技术领域technical field
本发明涉及无线通信技术领域，具体而言，涉及通信装置和频段切换方法。The present invention relates to the technical field of wireless communication, in particular, to a communication device and a frequency band switching method.
背景技术Background technique
IEEE（美国电气和电子工程师协会）802.11ad技术主要用在家庭娱乐，特点是：大数据量的传输，数据速率高，但其覆盖的范围较小，大概为10米甚至更小。IEEE (Institute of Electrical and Electronics Engineers) 802.11ad technology is mainly used in home entertainment. It is characterized by large data transmission and high data rate, but its coverage is small, about 10 meters or even smaller.
802.11ad技术使用60GHz的频谱（在本文中实际指包含60GHz在内的一段频谱），但在中国由于频谱管理的规定，60GHz频谱分配给802.11ad的资源非常少，所以无委又分配了40GHz-50GHz的频谱用于11ad，在中国称为CMMW（ChinaMillimeterWave，中国毫米波），在IEEE中称为802.11aj。802.11ad technology uses 60GHz spectrum (actually refers to a section of spectrum including 60GHz in this article), but in China, due to spectrum management regulations, 60GHz spectrum is allocated to 802.11ad very few resources, so no committee allocated 40GHz- The 50GHz spectrum is used for 11ad, which is called CMMW (ChinaMillimeterWave, Chinese millimeter wave) in China and 802.11aj in IEEE.
由于40GHz-50GHz的频谱和60GHz的频谱存在着很大的差异，譬如：在传输中衰减的不同、传输功率的不同等等，完全把已经在802.11ad中已经制定好的技术点应用到802.11aj中显然是行不通的，所以在现在11aj制定的过程中，有人提出了这样的构想，如图1所示：即802.11ad的设备、CMMW-60GHz的设备和CMMW-45GHz（在本文中实际指包含45GHz在内的一段频谱）的设备能够在同一个网络中融合，具体如图2所示，802.11ad的设备204、206，CMMW-60GHz的设备208、210，以及CMMW-45GHz的设备212、214都能够加入网络，并且一种方式是由上述设备通过CMMWAP/PCP（接入点/personalbasicservicesetcontrolpoint，个人基本服务集控制点）202接入网络，另一种方式是在45GHz或60GHz网络下，如设备206与设备208之间可以通过直连（比如DLS，DirectLinkSetup；或是TDLS，TunneledDirectLinkSetup，通道直接链路建立）的方式进行通信。Due to the great difference between the 40GHz-50GHz spectrum and the 60GHz spectrum, such as: different attenuation during transmission, different transmission power, etc., completely apply the technical points that have been formulated in 802.11ad to 802.11aj It is obviously not feasible in 11aj, so in the process of formulating 11aj, someone proposed such a concept, as shown in Figure 1: 802.11ad equipment, CMMW-60GHz equipment and CMMW-45GHz (actually referred to in this article A spectrum including 45GHz) devices can be integrated in the same network, specifically as shown in Figure 2, 802.11ad devices 204, 206, CMMW-60GHz devices 208, 210, and CMMW-45GHz devices 212, 214 can join the network, and one way is to access the network by the above-mentioned equipment through CMMWAP/PCP (access point/personal basic service set control point, personal basic service set control point) 202, another way is under 45GHz or 60GHz network, such as The device 206 and the device 208 may communicate through a direct connection (for example, DLS, DirectLinkSetup; or TDLS, TunneledDirectLinkSetup, channel direct link setup).
虽然相关技术中，802.11aj的设备可以支持45GHz和60GHz的网络，但并没有给出相关机制，使得上述设备能够在45GHz与60GHz之间实现频段切换，导致即便是在当前频段极为繁忙的情况下，设备之间依然只能够在当前频段中通信，而无法切换至相对空闲的其他频段，这显然是极为不利的。Although in the related art, 802.11aj devices can support 45GHz and 60GHz networks, but there is no relevant mechanism, so that the above-mentioned devices can switch between 45GHz and 60GHz frequency bands, resulting in even when the current frequency band is extremely busy. , the devices can still only communicate in the current frequency band, but cannot switch to other relatively idle frequency bands, which is obviously extremely disadvantageous.
因此，需要一种新的技术方案，可以使得802.11aj的设备能够在60GHz和45GHz之间切换工作，从较为繁忙频段切换至空闲的频段，以提高设备间的通信效率。Therefore, a new technical solution is needed, which can enable 802.11aj devices to switch between 60 GHz and 45 GHz, and switch from a relatively busy frequency band to an idle frequency band, so as to improve communication efficiency between devices.
发明内容Contents of the invention
本发明正是基于上述问题，提出了一种新的技术方案，可以使得802.11aj的设备能够在60GHz和45GHz之间切换工作，从较为繁忙频段切换至空闲的频段，以提高设备间的通信效率。Based on the above problems, the present invention proposes a new technical solution, which can enable 802.11aj equipment to switch between 60GHz and 45GHz, and switch from a relatively busy frequency band to an idle frequency band, so as to improve communication efficiency between devices .
有鉴于此，本发明提出了一种通信装置，包括：消息生成模块和数据交互模块；其中，In view of this, the present invention proposes a communication device, including: a message generation module and a data interaction module; wherein,
所述消息生成模块，在第一频段中生成频段切换消息帧，所述频段切换消息帧至少包含第一切换时间点信息和将要切换到的第二频段的信息；所述数据交互模块，在所述第一频段中发送所述频段切换消息帧，以及在所述第一频段中接收所述频段切换消息帧的响应消息帧；和/或The message generation module generates a frequency band switching message frame in the first frequency band, and the frequency band switching message frame includes at least the information of the first switching time point and the information of the second frequency band to be switched to; the data interaction module, in the Sending the frequency band switching message frame in the first frequency band, and receiving a response message frame of the frequency band switching message frame in the first frequency band; and/or
所述消息生成模块根据所述数据交互模块接收到的所述频段切换消息帧，生成所述频段切换消息帧的响应消息帧，所述频段切换消息帧至少包含第一切换时间点信息和将要切换到的第二频段的信息；所述数据交互模块，在所述第一频段中接收所述频段切换消息帧，以及在所述第一频段中发送所述频段切换消息帧的响应消息帧。The message generating module generates a response message frame of the frequency band switching message frame according to the frequency band switching message frame received by the data interaction module, and the frequency band switching message frame includes at least the first switching time point information and the The received information of the second frequency band; the data interaction module receives the frequency band switching message frame in the first frequency band, and sends a response message frame of the frequency band switching message frame in the first frequency band.
在该技术方案中，通信装置可以是手机或是平板，也可以是路由器等设备，消息生成模块可以是通信装置中数据处理的芯片模块，而数据交互模块则相当于信号收发装置以及天线等。譬如，对于两个均处于第一频段（60GHz）的通信装置，当发现60GHz的通信频段过于繁忙时，可以由一方发送频段切换消息帧，与另一方进行协商，以实现共同切换至第二频段（45GHz）进行通信，其中第一切换时间点、通信装置所处的第一频段的信息以及将要切换到的第二频段的信息可以用信息元素IE（InformationElement）的形式封装在频段切换消息帧中，它们在频段切换消息帧中处于不同的位置域。In this technical solution, the communication device can be a mobile phone or a tablet, or a device such as a router, the message generation module can be a chip module for data processing in the communication device, and the data interaction module is equivalent to a signal transceiver and an antenna. For example, for two communication devices that are both in the first frequency band (60GHz), when the 60GHz communication frequency band is found to be too busy, one party can send a frequency band switching message frame and negotiate with the other party to achieve common switching to the second frequency band (45GHz) for communication, where the first switching time point, the information of the first frequency band where the communication device is located, and the information of the second frequency band to be switched to can be encapsulated in the frequency band switching message frame in the form of information element IE (InformationElement) , they are in different position fields in the band switching message frame.
在上述技术方案中，优选地，所述频段切换消息帧还包括：频段切换的超时信息和将要切换到的所述第二频段的工作信道信息。在该技术方案中，在频段切换消息帧中可以同时包含切换时间点信息和超时信息，从而当超出该设定的超时信息时，可以直接判定为切换失败，避免通信装置无限等待下去。同时，由于第二频段中可能包含有多个工作信道，因而通过告知第二频段的工作信道信息，使得同时切换频段的多个通信装置可以准确切换至相同的工作信道，避免无法建立连接，譬如，切换的超时信息可与切换的时间点处于同一域中，可以是由一个16比特位的二进制数组来标识“0000110000000011”，高八位标识切换的时间点，低八位表示切换的超时信息，其单位可以是10us，在这个具体例子中，标识超时的信息为30us，切换的工作信道可以和第二频段的信息处于同一个域中，它们可以是由一个8比特位的二进制数组来标识“00010011”，其中高4位标识切换到的频段信息，低4位标识切换到的频段信息的具体工作信道，在这个例子中，高4为“0001”表示切换的频段信息为45GHz，具体的工作信道为第3工作信道。当然不管是切换时间点、超时信息、第二频段的信息以及需要切换到的第二频段中的工作信道，它们都可以用不同的信息元素封装在频段切换消息帧中标识出来，也可以用不同于上述例子中的比特位长度来标识，这里不再赘述。In the above technical solution, preferably, the frequency band switching message frame further includes: timeout information of frequency band switching and working channel information of the second frequency band to be switched to. In this technical solution, the switching time point information and timeout information can be included in the frequency band switching message frame at the same time, so that when the set timeout information is exceeded, it can be directly determined that the switching fails, preventing the communication device from waiting indefinitely. At the same time, since the second frequency band may contain multiple working channels, by notifying the working channel information of the second frequency band, multiple communication devices that switch frequency bands at the same time can accurately switch to the same working channel to avoid failure to establish a connection, such as , the timeout information of switching can be in the same field as the time point of switching, which can be identified by a 16-bit binary array "0000110000000011", the high eight bits indicate the time point of switching, and the low eight bits represent the timeout information of switching, Its unit can be 10us. In this specific example, the timeout information is 30us. The switched working channel can be in the same domain as the information of the second frequency band. They can be identified by an 8-bit binary array " 00010011", where the upper 4 bits identify the frequency band information to be switched to, and the lower 4 bits identify the specific working channel of the frequency band information to be switched to. In this example, the upper 4 bits are "0001", indicating that the frequency band information to be switched to is 45GHz. The channel is the third working channel. Of course, regardless of the switching time point, timeout information, information of the second frequency band, and the working channel in the second frequency band to be switched to, they can all be marked in the frequency band switching message frame with different information elements, or can be marked with different information elements. It is identified by the bit length in the above example, and will not be repeated here.
在上述技术方案中，优选地，所述频段切换消息帧还包括：时间同步功能（TSF，TimingSynchronizationFunction）信息。在该技术方案中，通过加入TSF信息，使得共同切换频段的多个通信装置可以依此实现时间同步，以便建立通信连接。当然，如果所述多个通信装置在切换频段之前已经建立了连接，那么也可以不在频段切换消息帧中添加TSF信息，其中时间同步功能信息可以以信息元素的形式封装在频段切换消息帧中，由频段切换消息帧的发送者来提供，频段消息帧的接收者完全接收TSF信息，由此实现两者时间上的同步。In the above technical solution, preferably, the frequency band switching message frame further includes: timing synchronization function (TSF, TimingSynchronizationFunction) information. In this technical solution, by adding TSF information, multiple communication devices that switch frequency bands together can achieve time synchronization so as to establish a communication connection. Of course, if the multiple communication devices have established connections before switching frequency bands, then the TSF information may not be added to the frequency band switching message frame, wherein the time synchronization function information may be encapsulated in the frequency band switching message frame in the form of information elements, It is provided by the sender of the frequency band switching message frame, and the receiver of the frequency band message frame completely receives the TSF information, thereby realizing time synchronization between the two.
在上述技术方案中，优选地，所述频段切换消息帧为管理消息帧、动作消息帧或控制消息帧，所述频段切换消息帧的响应消息帧为管理消息帧、动作消息帧或控制消息帧，在该技术方案中，当频段切换消息帧为管理消息帧时，其帧控制域的类型Type和子类型Subtype的联合值用来标识帧的类型，譬如可用“001000”来标识频段切换消息帧为管理消息帧；当频段切换消息帧为动作消息帧或控制消息帧时，其帧控制域的类型Type和子类型Subtype的联合值用来标识帧的类型，譬如可用“010110”来标识频段切换消息帧为动作消息帧或控制消息帧。对应的响应消息帧的情况与之相类似，此处不再赘述。In the above technical solution, preferably, the frequency band switching message frame is a management message frame, an action message frame or a control message frame, and the response message frame of the frequency band switching message frame is a management message frame, an action message frame or a control message frame , in this technical solution, when the frequency band switching message frame is a management message frame, the joint value of the type Type and the subtype Subtype of the frame control field is used to identify the type of the frame, for example, "001000" can be used to identify the frequency band switching message frame as Management message frame; when the frequency band switching message frame is an action message frame or a control message frame, the joint value of the type Type and the subtype Subtype of the frame control field is used to identify the type of the frame, for example, "010110" can be used to identify the frequency band switching message frame It is an action message frame or a control message frame. The situation of the corresponding response message frame is similar and will not be repeated here.
在上述技术方案中，优选地，还包括：所述频段切换消息帧的响应消息帧为所述频段切换消息帧的确认消息帧或所述频段切换消息帧的拒绝消息帧；其中，所述拒绝消息帧至少包括所述拒绝消息帧的发送方所推荐的第二切换时间点信息。在该技术方案中，若响应消息帧为确认消息帧，则频段切换消息帧的收发双方可以在约定的第一切换时间点实现频段切换；若响应消息帧为拒绝消息帧，则频段切换消息帧的收发双方可以在第二切换时间点实现频段切换，具体地第二切换时间点信息可以用IE的形式封装在拒绝消息帧中，可以是由一个8比特位的数组“00011111”来标识切换的时间点，当然也可用其它比特位长度的数组来标识，这里不再赘述。In the above technical solution, preferably, it further includes: the response message frame of the frequency band switching message frame is the confirmation message frame of the frequency band switching message frame or the rejection message frame of the frequency band switching message frame; wherein, the rejection The message frame includes at least the second switching time point information recommended by the sender of the rejection message frame. In this technical solution, if the response message frame is a confirmation message frame, the sender and receiver of the frequency band switching message frame can realize the frequency band switching at the agreed first switching time point; if the response message frame is a rejection message frame, the frequency band switching message frame The sender and receiver can switch frequency bands at the second switching time point. Specifically, the second switching time point information can be encapsulated in the rejection message frame in the form of IE, and the switching can be identified by an 8-bit array "00011111" The time point, of course, can also be identified by an array of other bit lengths, which will not be repeated here.
在上述技术方案中，优选地，还包括：In the above technical solution, preferably, it also includes:
所述消息生成模块在所述第二频段中生成频段切换完成消息帧，所述频段切换完成消息帧至少包含所述第二频段的信道信息；所述数据交互模块在所述第二频段中发送所述频段切换完成消息帧，以及在所述第二频段中接收所述频段切换完成消息帧的响应消息帧；和/或The message generation module generates a frequency band switching completion message frame in the second frequency band, and the frequency band switching completion message frame includes at least channel information of the second frequency band; the data interaction module sends in the second frequency band The frequency band switching complete message frame, and a response message frame receiving the frequency band switching complete message frame in the second frequency band; and/or
所述消息生成模块根据所述数据交互模块接收到的所述频段切换完成消息帧，生成所述频段切换完成消息帧的响应消息帧，所述频段切换完成消息帧至少包含所述第二频段的信道信息；所述数据交互模块在所述第二频段中接收所述频段切换完成消息帧，以及在所述第二频段中发送所述频段切换完成消息帧的响应消息帧。在该技术方案中，为了保证后续的通信正常进行，当两者切换后，由频段切换消息帧的发送者在第二频段中发送频段切换完成消息帧用来确认频段切换消息帧的响应者是否已经切换到第二频段中，在这个频段切换完成帧中，它至少包含了第二频段的信息，可以用IE的形式封装在频段切换完成帧中，当然也可以以域的形式出现在频段切换完成帧中。The message generating module generates a response message frame of the frequency band switching completion message frame according to the frequency band switching completion message frame received by the data interaction module, and the frequency band switching completion message frame includes at least the information of the second frequency band Channel information: the data interaction module receives the frequency band switching completion message frame in the second frequency band, and sends a response message frame to the frequency band switching completion message frame in the second frequency band. In this technical solution, in order to ensure the normal progress of subsequent communication, when the two are switched, the sender of the frequency band switching message frame sends a frequency band switching complete message frame in the second frequency band to confirm whether the responder of the frequency band switching message frame It has been switched to the second frequency band. In this frequency band switching completion frame, it contains at least the information of the second frequency band. It can be encapsulated in the frequency band switching completion frame in the form of IE, and of course it can also appear in the frequency band switching in the form of domains. Complete frame.
在上述技术方案中，优选地，还包括：所述频段切换完成消息帧的响应消息帧为确认消息帧。在该技术方案中，通过发送确认消息帧（ACK帧），从而在频段切换消息帧的收发双方确认已经完成了从第一频段向第二频段的切换，双方在完成频段切换完成以及确认后，就可以进行接下来的业务通信。In the above technical solution, preferably, it further includes: the response message frame of the frequency band switching completion message frame is a confirmation message frame. In this technical solution, by sending an acknowledgment message frame (ACK frame), the sender and receiver of the frequency band switch message frame confirm that the switch from the first frequency band to the second frequency band has been completed. After the completion and confirmation of the frequency band switch, The next business communication can be carried out.
在上述技术方案中，优选地，还包括：当所述第一频段为60GHz的频段时，所述第二频段为45GHz的频段；以及当所述第一频段为45GHz的频段时，所述第二频段为60GHz的频段。在该技术方案中，对于802.11aj的设备，可以在45GHz和60GHz之间实现频段切换，从而在当前频段较为繁忙时，切换至另一个频段中进行通信。当然，对于其他通信协议和通信频段而言，显然也可以采用本发明的技术方案，从而实现多个通信装置的频段的切换操作。In the above technical solution, preferably, further comprising: when the first frequency band is a 60 GHz frequency band, the second frequency band is a 45 GHz frequency band; and when the first frequency band is a 45 GHz frequency band, the first The second frequency band is the frequency band of 60GHz. In this technical solution, for 802.11aj equipment, frequency band switching between 45 GHz and 60 GHz can be realized, so that when the current frequency band is relatively busy, it can be switched to another frequency band for communication. Of course, for other communication protocols and communication frequency bands, it is obvious that the technical solution of the present invention can also be adopted, so as to realize the switching operation of the frequency bands of multiple communication devices.
在上述技术方案中，优选地，还包括：会话处理模块，在所述通信装置完成切换至所述第二频段之后，与所述频段切换消息帧的交互方在所述第二频段执行会话密钥协商。在该技术方案中，若频段切换的多个通信装置在第一频段中已经建立连接，则当切换至第二频段后，可以不必执行会话密钥协商，而直接使用之前建立的连接的相关参数；若频段切换的多个通信装置在第一频段中并未建立连接，则当切换至第二频段后，需要通过会话密钥协商，以便建立连接。In the above technical solution, preferably, further comprising: a session processing module, after the communication device finishes switching to the second frequency band, the interacting party with the frequency band switching message frame performs session encryption in the second frequency band key negotiation. In this technical solution, if a plurality of communication devices that switch frequency bands have already established connections in the first frequency band, after switching to the second frequency band, it is not necessary to perform session key negotiation, but directly use the relevant parameters of the previously established connections ; If the multiple communication devices for frequency band switching have not established a connection in the first frequency band, after switching to the second frequency band, session key negotiation is required to establish a connection.
本发明还提出了一种频段切换方法，包括：第一通信装置在第一频段中生成频段切换消息帧，所述频段切换消息帧至少包含第一切换时间点信息和将要切换到的第二频段的信息；所述第一通信装置在所述第一频段中向第二通信装置发送所述频段切换消息帧，以及在所述第一频段中接收所述频段切换消息帧的响应消息帧；其中，所述第二通信装置根据接收到的所述频段切换消息帧，生成并向所述第一通信装置发送所述频段切换消息帧的响应消息帧。在该技术方案中，第一通信装置和第二通信装置可以是手机或是平板，也可以是路由器等设备，通过相应通信装置中的芯片模块执行数据处理，并由信号收发装置以及天线等实现信号的收发。譬如，对于两个均处于第一频段（60GHz）的通信装置，当发现60GHz的通信频段过于繁忙时，可以由一方发送频段切换消息帧，与另一方进行协商，以实现共同切换至第二频段（45GHz）进行通信，其中第一切换时间点、通信装置所处的第一频段的信息以及将要切换到的第二频段的信息可以用信息元素IE（InformationElement）的形式封装在频段切换消息帧中，它们在频段切换消息帧中处于不同的位置域。The present invention also proposes a frequency band switching method, including: the first communication device generates a frequency band switching message frame in the first frequency band, and the frequency band switching message frame includes at least the first switching time point information and the second frequency band to be switched to information; the first communication device sends the frequency band switching message frame to the second communication device in the first frequency band, and receives a response message frame of the frequency band switching message frame in the first frequency band; wherein The second communication device generates and sends a response message frame to the frequency band switching message frame to the first communication device according to the received frequency band switching message frame. In this technical solution, the first communication device and the second communication device may be mobile phones or tablets, or equipment such as routers, and data processing is performed through chip modules in the corresponding communication devices, and are realized by signal transceiver devices and antennas. Signal sending and receiving. For example, for two communication devices that are both in the first frequency band (60GHz), when the 60GHz communication frequency band is found to be too busy, one party can send a frequency band switching message frame and negotiate with the other party to achieve common switching to the second frequency band (45GHz) for communication, where the first switching time point, the information of the first frequency band where the communication device is located, and the information of the second frequency band to be switched to can be encapsulated in the frequency band switching message frame in the form of information element IE (InformationElement) , they are in different position fields in the band switching message frame.
在上述技术方案中，优选地，所述频段切换消息帧还包括：频段切换的超时信息和将要切换到的所述第二频段的工作信道信息。在该技术方案中，在频段切换消息帧中可以同时包含切换时间点信息和超时信息，从而当超出该设定的超时信息时，可以直接判定为切换失败，避免通信装置无限等待下去。同时，由于第二频段中可能包含有多个工作信道，因而通过告知第二频段的工作信道信息，使得同时切换频段的多个通信装置可以准确切换至相同的工作信道，避免无法建立连接，譬如，切换的超时信息可与切换的时间点处于同一域中，可以是由一个16比特位的二进制数组来标识“0000110000000011”，高八位标识切换的时间点，低八位表示切换的超时信息，其单位可以是10us，在这个具体例子中，标识超时的信息为30us，切换的工作信道可以和第二频段的信息处于同一个域中，它们可以是由一个8比特位的二进制数组来标识“00010011”，其中高4位标识切换到的频段信息，低4位标识切换到的频段信息的具体工作信道，在这个例子中，高4为“0001”表示切换的频段信息为45GHz，具体的工作信道为第3工作信道。当然不管是切换时间点、超时信息、第二频段的信息以及需要切换到的第二频段中的工作信道，它们都可以用不同的信息元素封装在频段切换消息帧中标识出来，也可以用不同于上述例子中的比特位长度来标识，这里不再赘述。In the above technical solution, preferably, the frequency band switching message frame further includes: timeout information of frequency band switching and working channel information of the second frequency band to be switched to. In this technical solution, the switching time point information and timeout information can be included in the frequency band switching message frame at the same time, so that when the set timeout information is exceeded, it can be directly determined that the switching fails, preventing the communication device from waiting indefinitely. At the same time, since the second frequency band may contain multiple working channels, by notifying the working channel information of the second frequency band, multiple communication devices that switch frequency bands at the same time can accurately switch to the same working channel to avoid failure to establish a connection, such as , the timeout information of switching can be in the same field as the time point of switching, which can be identified by a 16-bit binary array "0000110000000011", the high eight bits indicate the time point of switching, and the low eight bits represent the timeout information of switching, Its unit can be 10us. In this specific example, the timeout information is 30us. The switched working channel can be in the same domain as the information of the second frequency band. They can be identified by an 8-bit binary array " 00010011", where the upper 4 bits identify the frequency band information to be switched to, and the lower 4 bits identify the specific working channel of the frequency band information to be switched to. In this example, the upper 4 bits are "0001", indicating that the frequency band information to be switched to is 45GHz. The channel is the third working channel. Of course, regardless of the switching time point, timeout information, information of the second frequency band, and the working channel in the second frequency band to be switched to, they can all be marked in the frequency band switching message frame with different information elements, or can be marked with different information elements. It is identified by the bit length in the above example, and will not be repeated here.
在上述技术方案中，优选地，所述频段切换消息帧还包括：时间同步功能信息。在该技术方案中，通过加入TSF信息，使得共同切换频段的多个通信装置可以依此实现时间同步，以便建立通信连接。当然，如果所述多个通信装置在切换频段之前已经建立了连接，那么也可以不在频段切换消息帧中添加TSF信息，其中时间同步功能信息可以以信息元素的形式封装在频段切换消息帧中，由频段切换消息帧的发送者来提供，频段消息帧的接收者完全接收TSF信息，由此实现两者时间上的同步。In the above technical solution, preferably, the frequency band switching message frame further includes: time synchronization function information. In this technical solution, by adding TSF information, multiple communication devices that switch frequency bands together can achieve time synchronization so as to establish a communication connection. Of course, if the multiple communication devices have established connections before switching frequency bands, then the TSF information may not be added to the frequency band switching message frame, wherein the time synchronization function information may be encapsulated in the frequency band switching message frame in the form of information elements, It is provided by the sender of the frequency band switching message frame, and the receiver of the frequency band message frame completely receives the TSF information, thereby realizing time synchronization between the two.
在上述技术方案中，优选地，所述频段切换消息帧为管理消息帧、动作消息帧或控制消息帧，所述频段切换消息帧的响应消息帧为管理消息帧、动作消息帧或控制消息帧，在该技术方案中，当频段切换消息帧为管理消息帧时，其帧控制域的类型Type和子类型Subtype的联合值用来标识帧的类型，譬如可用“001000”来标识频段切换消息帧为管理消息帧；当频段切换消息帧为动作消息帧或控制消息帧时，其帧控制域的类型Type和子类型Subtype的联合值用来标识帧的类型，譬如可用“010110”来标识频段切换消息帧为动作消息帧或控制消息帧。对应的响应消息帧的情况与之相类似，此处不再赘述。In the above technical solution, preferably, the frequency band switching message frame is a management message frame, an action message frame or a control message frame, and the response message frame of the frequency band switching message frame is a management message frame, an action message frame or a control message frame , in this technical solution, when the frequency band switching message frame is a management message frame, the joint value of the type Type and the subtype Subtype of the frame control field is used to identify the type of the frame, for example, "001000" can be used to identify the frequency band switching message frame as Management message frame; when the frequency band switching message frame is an action message frame or a control message frame, the joint value of the type Type and the subtype Subtype of the frame control field is used to identify the type of the frame, for example, "010110" can be used to identify the frequency band switching message frame It is an action message frame or a control message frame. The situation of the corresponding response message frame is similar and will not be repeated here.
在上述技术方案中，优选地，还包括：所述频段切换消息帧的响应消息帧为所述频段切换消息帧的确认消息帧或所述频段切换消息帧的拒绝消息帧；其中，所述拒绝消息帧至少包括所述第二通信装置所推荐的第二切换时间点信息。在该技术方案中，若响应消息帧为确认消息帧，则频段切换消息帧的收发双方可以在约定的第一切换时间点实现频段切换；若响应消息帧为拒绝消息帧，则频段切换消息帧的收发双方可以在第二切换时间点实现频段切换，具体地第二切换时间点信息可以用IE的形式封装在拒绝消息帧中，可以是由一个8比特位的数组“00011111”来标识切换的时间点，当然也可用其它比特位长度的数组来标识，这里不再赘述。In the above technical solution, preferably, it further includes: the response message frame of the frequency band switching message frame is the confirmation message frame of the frequency band switching message frame or the rejection message frame of the frequency band switching message frame; wherein, the rejection The message frame includes at least information about the second switching time point recommended by the second communication device. In this technical solution, if the response message frame is a confirmation message frame, the sender and receiver of the frequency band switching message frame can realize the frequency band switching at the agreed first switching time point; if the response message frame is a rejection message frame, the frequency band switching message frame The sender and receiver can switch frequency bands at the second switching time point. Specifically, the second switching time point information can be encapsulated in the rejection message frame in the form of IE, and the switching can be identified by an 8-bit array "00011111" The time point, of course, can also be identified by an array of other bit lengths, which will not be repeated here.
在上述技术方案中，优选地，还包括：所述第一通信装置在所述第二频段中生成频段切换完成消息帧，所述频段切换完成消息帧至少包含所述第二频段的信道信息；所述第一通信装置在所述第二频段中向所述第二通信装置发送所述频段切换完成消息帧，以及在所述第二频段中接收所述频段切换完成消息帧的响应消息帧；其中，所述第二通信装置根据接收到的所述频段切换完成消息帧，生成并向所述第一通信装置发送所述频段切换完成消息帧的响应消息帧。在该技术方案中，为了保证后续的通信正常进行，当两者切换后，由频段切换消息帧的发送者在第二频段中发送频段切换完成消息帧用来确认频段切换消息帧的响应者是否已经切换到第二频段中，在这个频段切换完成帧中，它至少包含了第二频段的信息，可以用IE的形式封装在频段切换完成帧中，当然也可以以域的形式出现在频段切换完成帧中。In the above technical solution, preferably, further comprising: the first communication device generates a frequency band switching complete message frame in the second frequency band, and the frequency band switching complete message frame includes at least channel information of the second frequency band; The first communication device sends the frequency band switch complete message frame to the second communication device in the second frequency band, and receives a response message frame of the frequency band switch complete message frame in the second frequency band; Wherein, the second communication device generates and sends a response message frame to the frequency band switching completion message frame to the first communication device according to the received frequency band switching completion message frame. In this technical solution, in order to ensure the normal progress of subsequent communication, when the two are switched, the sender of the frequency band switching message frame sends a frequency band switching complete message frame in the second frequency band to confirm whether the responder of the frequency band switching message frame It has been switched to the second frequency band. In this frequency band switching completion frame, it contains at least the information of the second frequency band. It can be encapsulated in the frequency band switching completion frame in the form of IE, and of course it can also appear in the frequency band switching in the form of domains. Complete frame.
在上述技术方案中，优选地，还包括：所述频段切换完成消息帧的响应消息帧为确认消息帧。在该技术方案中，通过发送确认消息帧（ACK帧），从而在频段切换消息帧的收发双方确认已经完成了从第一频段向第二频段的切换，双方在完成频段切换完成以及确认后，就可以进行接下来的业务通信。In the above technical solution, preferably, it further includes: the response message frame of the frequency band switching completion message frame is a confirmation message frame. In this technical solution, by sending an acknowledgment message frame (ACK frame), the sender and receiver of the frequency band switch message frame confirm that the switch from the first frequency band to the second frequency band has been completed. After the completion and confirmation of the frequency band switch, The next business communication can be carried out.
在上述技术方案中，优选地，包括：当所述第一频段为60GHz的频段时，所述第二频段为45GHz的频段；以及当所述第一频段为45GHz的频段时，所述第二频段为60GHz的频段。在该技术方案中，对于802.11aj的设备，可以在45GHz和60GHz之间实现频段切换，从而在当前频段较为繁忙时，切换至另一个频段中进行通信。当然，对于其他通信协议和通信频段而言，显然也可以采用本发明的技术方案，从而实现多个通信装置的频段的切换操作。In the above technical solution, preferably, it includes: when the first frequency band is a 60GHz frequency band, the second frequency band is a 45GHz frequency band; and when the first frequency band is a 45GHz frequency band, the second The frequency band is the 60GHz frequency band. In this technical solution, for 802.11aj equipment, frequency band switching between 45 GHz and 60 GHz can be realized, so that when the current frequency band is relatively busy, it can be switched to another frequency band for communication. Of course, for other communication protocols and communication frequency bands, it is obvious that the technical solution of the present invention can also be adopted, so as to realize the switching operation of the frequency bands of multiple communication devices.
在上述技术方案中，优选地，还包括：在完成所述频段切换之后，所述第一通信装置和所述第二通信装置在所述第二频段执行会话密钥协商。在该技术方案中，若频段切换的多个通信装置在第一频段中已经建立连接，则当切换至第二频段后，可以不必执行会话密钥协商，而直接使用之前建立的连接的相关参数；若频段切换的多个通信装置在第一频段中并未建立连接，则当切换至第二频段后，需要通过会话密钥协商，以便建立连接。In the above technical solution, preferably, further comprising: after the frequency band switching is completed, the first communication device and the second communication device perform session key negotiation in the second frequency band. In this technical solution, if a plurality of communication devices that switch frequency bands have already established connections in the first frequency band, after switching to the second frequency band, it is not necessary to perform session key negotiation, but directly use the relevant parameters of the previously established connections ; If the multiple communication devices for frequency band switching have not established a connection in the first frequency band, after switching to the second frequency band, session key negotiation is required to establish a connection.
通过以上技术方案，可以使得802.11aj的设备能够在60GHz和45GHz之间切换工作，从较为繁忙频段切换至空闲的频段，以提高设备间的通信效率。Through the above technical solutions, 802.11aj devices can be switched between 60 GHz and 45 GHz, switching from a relatively busy frequency band to an idle frequency band, so as to improve communication efficiency between devices.
附图说明Description of drawings
图1是一种帧结构模型的示意图；Fig. 1 is a schematic diagram of a frame structure model;
图2是一种网络设备进行数据交互的应用场景示意图；FIG. 2 is a schematic diagram of an application scenario in which a network device performs data interaction;
图3示出了根据本发明的一个实施例的通信装置的框图；Fig. 3 shows a block diagram of a communication device according to an embodiment of the present invention;
图4示出了根据本发明的一个实施例的频段切换方法的流程图；FIG. 4 shows a flowchart of a frequency band switching method according to an embodiment of the present invention;
图5示出了根据本发明的实施例的切换频段的具体流程图；FIG. 5 shows a specific flow chart of switching frequency bands according to an embodiment of the present invention;
图6示出了根据本发明的实施例的频段切换消息帧中的切换时间信息的结构示意图；FIG. 6 shows a schematic structural diagram of switching time information in a frequency band switching message frame according to an embodiment of the present invention;
图7示出了根据本发明的实施例的频段切换消息帧中的切换信道信息的结构示意图。Fig. 7 shows a schematic structural diagram of switching channel information in a frequency band switching message frame according to an embodiment of the present invention.
具体实施方式detailed description
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.
图3示出了根据本发明的一个实施例的通信装置的框图。Fig. 3 shows a block diagram of a communication device according to an embodiment of the present invention.
如图3所示，根据本发明的一个实施例的通信装置300，包括：消息生成模块302和数据交互模块304。其中，As shown in FIG. 3 , a communication device 300 according to an embodiment of the present invention includes: a message generation module 302 and a data interaction module 304 . in,
所述消息生成模块302，在第一频段中生成频段切换消息帧，所述频段切换消息帧至少包含第一切换时间点信息和将要切换到的第二频段的信息；所述数据交互模块304，在所述第一频段中发送所述频段切换消息帧，以及在所述第一频段中接收所述频段切换消息帧的响应消息帧；和/或The message generation module 302 generates a frequency band switching message frame in the first frequency band, and the frequency band switching message frame includes at least the information of the first switching time point and the information of the second frequency band to be switched to; the data interaction module 304, sending the band switch message frame in the first frequency band, and receiving a response message frame to the band switch message frame in the first frequency band; and/or
所述消息生成模块302根据所述数据交互模块304接收到的所述频段切换消息帧，生成所述频段切换消息帧的响应消息帧，所述频段切换消息帧至少包含第一切换时间点信息和将要切换到的第二频段的信息；所述数据交互模块304，在所述第一频段中接收所述频段切换消息帧，以及在所述第一频段中发送所述频段切换消息帧的响应消息帧。The message generating module 302 generates a response message frame of the frequency band switching message frame according to the frequency band switching message frame received by the data interaction module 304, and the frequency band switching message frame includes at least the first switching time point information and Information about the second frequency band to be switched to; the data interaction module 304 receives the frequency band switching message frame in the first frequency band, and sends a response message of the frequency band switching message frame in the first frequency band frame.
在该技术方案中，通信装置300可以是手机或是平板，也可以是路由器等设备，消息生成模块302可以是通信装置中数据处理的芯片模块，而数据交互模块304则相当于信号收发装置以及天线等。譬如，对于两个均处于第一频段（60GHz）的通信装置，当发现60GHz的通信频段过于繁忙时，可以由一方发送频段切换消息帧，与另一方进行协商，以实现共同切换至第二频段（45GHz）进行通信，其中第一切换时间点、通信装置所处的第一频段的信息以及将要切换到的第二频段的信息可以用信息元素IE（InformationElement）的形式封装在频段切换消息帧中，它们在频段切换消息帧中处于不同的位置域。In this technical solution, the communication device 300 can be a mobile phone or a tablet, or a device such as a router, the message generation module 302 can be a chip module for data processing in the communication device, and the data interaction module 304 is equivalent to a signal transceiving device and Antenna etc. For example, for two communication devices that are both in the first frequency band (60GHz), when the 60GHz communication frequency band is found to be too busy, one party can send a frequency band switching message frame and negotiate with the other party to achieve common switching to the second frequency band (45GHz) for communication, where the first switching time point, the information of the first frequency band where the communication device is located, and the information of the second frequency band to be switched to can be encapsulated in the frequency band switching message frame in the form of information element IE (InformationElement) , they are in different position fields in the band switching message frame.
在上述技术方案中，优选地，所述频段切换消息帧还包括：频段切换的超时信息和将要切换到的所述第二频段的工作信道信息。在该技术方案中，在频段切换消息帧中可以同时包含切换时间点信息和超时信息，从而当超出该设定的超时信息时，可以直接判定为切换失败，避免通信装置无限等待下去。同时，由于第二频段中可能包含有多个工作信道，因而通过告知第二频段的工作信道信息，使得同时切换频段的多个通信装置可以准确切换至相同的工作信道，避免无法建立连接，譬如，切换的超时信息可与切换的时间点处于同一域中，可以是由一个16比特位的二进制数组来标识“0000110000000011”，高八位标识切换的时间点，低八位表示切换的超时信息，其单位可以是10us，在这个具体例子中，标识超时的信息为30us，切换的工作信道可以和第二频段的信息处于同一个域中，它们可以是由一个8比特位的二进制数组来标识“00010011”，其中高4位标识切换到的频段信息，低4位标识切换到的频段信息的具体工作信道，在这个例子中，高4为“0001”表示切换的频段信息为45GHz，具体的工作信道为第3工作信道。当然不管是切换时间点、超时信息、第二频段的信息以及需要切换到的第二频段中的工作信道，它们都可以用不同的信息元素封装在频段切换消息帧中标识出来，也可以用不同于上述例子中的比特位长度来标识，这里不再赘述。In the above technical solution, preferably, the frequency band switching message frame further includes: timeout information of frequency band switching and working channel information of the second frequency band to be switched to. In this technical solution, the switching time point information and timeout information can be included in the frequency band switching message frame at the same time, so that when the set timeout information is exceeded, it can be directly determined that the switching fails, preventing the communication device from waiting indefinitely. At the same time, since the second frequency band may contain multiple working channels, by notifying the working channel information of the second frequency band, multiple communication devices that switch frequency bands at the same time can accurately switch to the same working channel to avoid failure to establish a connection, such as , the timeout information of switching can be in the same field as the time point of switching, which can be identified by a 16-bit binary array "0000110000000011", the high eight bits indicate the time point of switching, and the low eight bits represent the timeout information of switching, Its unit can be 10us. In this specific example, the timeout information is 30us. The switched working channel can be in the same domain as the information of the second frequency band. They can be identified by an 8-bit binary array " 00010011", where the upper 4 bits identify the frequency band information to be switched to, and the lower 4 bits identify the specific working channel of the frequency band information to be switched to. In this example, the upper 4 bits are "0001", indicating that the frequency band information to be switched to is 45GHz. The channel is the third working channel. Of course, regardless of the switching time point, timeout information, information of the second frequency band, and the working channel in the second frequency band to be switched to, they can all be marked in the frequency band switching message frame with different information elements, or can be marked with different information elements. It is identified by the bit length in the above example, and will not be repeated here.
在上述技术方案中，优选地，所述频段切换消息帧还包括：时间同步功能（TSF，TimingSynchronizationFunction）信息。在该技术方案中，通过加入TSF信息，使得共同切换频段的多个通信装置可以依此实现时间同步，以便建立通信连接。当然，如果所述多个通信装置在切换频段之前已经建立了连接，那么也可以不在频段切换消息帧中添加TSF信息，其中时间同步功能信息可以以信息元素的形式封装在频段切换消息帧中，由频段切换消息帧的发送者来提供，频段消息帧的接收者完全接收TSF信息，由此实现两者时间上的同步。In the above technical solution, preferably, the frequency band switching message frame further includes: timing synchronization function (TSF, TimingSynchronizationFunction) information. In this technical solution, by adding TSF information, multiple communication devices that switch frequency bands together can achieve time synchronization so as to establish a communication connection. Of course, if the multiple communication devices have established connections before switching frequency bands, then the TSF information may not be added to the frequency band switching message frame, wherein the time synchronization function information may be encapsulated in the frequency band switching message frame in the form of information elements, It is provided by the sender of the frequency band switching message frame, and the receiver of the frequency band message frame completely receives the TSF information, thereby realizing time synchronization between the two.
在上述技术方案中，优选地，所述频段切换消息帧为管理消息帧、动作消息帧或控制消息帧，所述频段切换消息帧的响应消息帧为管理消息帧、动作消息帧或控制消息帧，在该技术方案中，当频段切换消息帧为管理消息帧时，其帧控制域的类型Type和子类型Subtype的联合值用来标识帧的类型，譬如可用“001000”来标识频段切换消息帧为管理消息帧；当频段切换消息帧为动作消息帧或控制消息帧时，其帧控制域的类型Type和子类型Subtype的联合值用来标识帧的类型，譬如可用“010110”来标识频段切换消息帧为动作消息帧或控制消息帧。对应的响应消息帧的情况与之相类似，此处不再赘述。In the above technical solution, preferably, the frequency band switching message frame is a management message frame, an action message frame or a control message frame, and the response message frame of the frequency band switching message frame is a management message frame, an action message frame or a control message frame , in this technical solution, when the frequency band switching message frame is a management message frame, the joint value of the type Type and the subtype Subtype of the frame control field is used to identify the type of the frame, for example, "001000" can be used to identify the frequency band switching message frame as Management message frame; when the frequency band switching message frame is an action message frame or a control message frame, the joint value of the type Type and the subtype Subtype of the frame control field is used to identify the type of the frame, for example, "010110" can be used to identify the frequency band switching message frame It is an action message frame or a control message frame. The situation of the corresponding response message frame is similar and will not be repeated here.
在上述技术方案中，优选地，还包括：所述频段切换消息帧的响应消息帧为所述频段切换消息帧的确认消息帧或所述频段切换消息帧的拒绝消息帧；其中，所述拒绝消息帧至少包括所述拒绝消息帧的发送方所推荐的第二切换时间点信息。在该技术方案中，若响应消息帧为确认消息帧，则频段切换消息帧的收发双方可以在约定的第一切换时间点实现频段切换；若响应消息帧为拒绝消息帧，则频段切换消息帧的收发双方可以在第二切换时间点实现频段切换，具体地第二切换时间点信息可以用IE的形式封装在拒绝消息帧中，可以是由一个8比特位的数组“00011111”来标识切换的时间点，当然也可用其它比特位长度的数组来标识，这里不再赘述。In the above technical solution, preferably, it further includes: the response message frame of the frequency band switching message frame is the confirmation message frame of the frequency band switching message frame or the rejection message frame of the frequency band switching message frame; wherein, the rejection The message frame includes at least the second switching time point information recommended by the sender of the rejection message frame. In this technical solution, if the response message frame is a confirmation message frame, the sender and receiver of the frequency band switching message frame can realize the frequency band switching at the agreed first switching time point; if the response message frame is a rejection message frame, the frequency band switching message frame The sender and receiver can switch frequency bands at the second switching time point. Specifically, the second switching time point information can be encapsulated in the rejection message frame in the form of IE, and the switching can be identified by an 8-bit array "00011111" The time point, of course, can also be identified by an array of other bit lengths, which will not be repeated here.
在上述技术方案中，优选地，还包括：In the above technical solution, preferably, it also includes:
所述消息生成模块302在所述第二频段中生成频段切换完成消息帧，所述频段切换完成消息帧至少包含所述第二频段的信道信息；所述数据交互模块304在所述第二频段中发送所述频段切换完成消息帧，以及在所述第二频段中接收所述频段切换完成消息帧的响应消息帧；和/或The message generation module 302 generates a frequency band switching completion message frame in the second frequency band, and the frequency band switching completion message frame includes at least channel information of the second frequency band; Sending the frequency band switch complete message frame in the second frequency band, and receiving a response message frame of the frequency band switch complete message frame in the second frequency band; and/or
所述消息生成模块302根据所述数据交互模块304接收到的所述频段切换完成消息帧，生成所述频段切换完成消息帧的响应消息帧，所述频段切换完成消息帧至少包含所述第二频段的信道信息；所述数据交互模块304在所述第二频段中接收所述频段切换完成消息帧，以及在所述第二频段中发送所述频段切换完成消息帧的响应消息帧。The message generation module 302 generates a response message frame of the frequency band switching completion message frame according to the frequency band switching completion message frame received by the data interaction module 304, and the frequency band switching completion message frame includes at least the second Channel information of a frequency band; the data interaction module 304 receives the frequency band switch complete message frame in the second frequency band, and sends a response message frame of the frequency band switch complete message frame in the second frequency band.
在该技术方案中，为了保证后续的通信正常进行，当两者切换后，由频段切换消息帧的发送者在第二频段中发送频段切换完成消息帧用来确认频段切换消息帧的响应者是否已经切换到第二频段中，在这个频段切换完成帧中，它至少包含了第二频段的信息，可以用IE的形式封装在频段切换完成帧中，当然也可以以域的形式出现在频段切换完成帧中。In this technical solution, in order to ensure the normal progress of subsequent communication, when the two are switched, the sender of the frequency band switching message frame sends a frequency band switching complete message frame in the second frequency band to confirm whether the responder of the frequency band switching message frame It has been switched to the second frequency band. In this frequency band switching completion frame, it contains at least the information of the second frequency band. It can be encapsulated in the frequency band switching completion frame in the form of IE, and of course it can also appear in the frequency band switching in the form of domains. Complete frame.
在上述技术方案中，优选地，还包括：所述频段切换完成消息帧的响应消息帧为确认消息帧。在该技术方案中，通过发送确认消息帧（ACK帧），从而在频段切换消息帧的收发双方确认已经完成了从第一频段向第二频段的切换，双方在完成频段切换完成以及确认后，就可以进行接下来的业务通信。In the above technical solution, preferably, it further includes: the response message frame of the frequency band switching completion message frame is a confirmation message frame. In this technical solution, by sending an acknowledgment message frame (ACK frame), the sender and receiver of the frequency band switch message frame confirm that the switch from the first frequency band to the second frequency band has been completed. After the completion and confirmation of the frequency band switch, The next business communication can be carried out.
在上述技术方案中，优选地，还包括：当所述第一频段为60GHz的频段时，所述第二频段为45GHz的频段；以及当所述第一频段为45GHz的频段时，所述第二频段为60GHz的频段。在该技术方案中，对于802.11aj的设备，可以在45GHz和60GHz之间实现频段切换，从而在当前频段较为繁忙时，切换至另一个频段中进行通信。当然，对于其他通信协议和通信频段而言，显然也可以采用本发明的技术方案，从而实现多个通信装置的频段的切换操作。In the above technical solution, preferably, further comprising: when the first frequency band is a 60 GHz frequency band, the second frequency band is a 45 GHz frequency band; and when the first frequency band is a 45 GHz frequency band, the first The second frequency band is the frequency band of 60GHz. In this technical solution, for 802.11aj equipment, frequency band switching between 45 GHz and 60 GHz can be realized, so that when the current frequency band is relatively busy, it can be switched to another frequency band for communication. Of course, for other communication protocols and communication frequency bands, it is obvious that the technical solution of the present invention can also be adopted, so as to realize the switching operation of the frequency bands of multiple communication devices.
在上述技术方案中，优选地，还包括：会话处理模块306，在所述通信装置300完成切换至所述第二频段之后，与所述频段切换消息帧的交互方在所述第二频段执行会话密钥协商。在该技术方案中，若频段切换的多个通信装置在第一频段中已经建立连接，则当切换至第二频段后，可以不必执行会话密钥协商，而直接使用之前建立的连接的相关参数；若频段切换的多个通信装置在第一频段中并未建立连接，则当切换至第二频段后，需要通过会话密钥协商，以便建立连接。当通信装置300生成并发送频段切换消息帧时，上述交互方即频段切换消息帧的接收方；当通信装置300接收频段切换消息帧时，上述交互方即频段切换消息帧的发送方。In the above technical solution, preferably, further comprising: a session processing module 306, after the communication device 300 finishes switching to the second frequency band, the interacting party with the frequency band switching message frame executes in the second frequency band Session key negotiation. In this technical solution, if a plurality of communication devices that switch frequency bands have already established connections in the first frequency band, after switching to the second frequency band, it is not necessary to perform session key negotiation, but directly use the relevant parameters of the previously established connections ; If the multiple communication devices for frequency band switching have not established a connection in the first frequency band, after switching to the second frequency band, session key negotiation is required to establish a connection. When the communication device 300 generates and sends a frequency band switching message frame, the interacting party is the receiver of the frequency band switching message frame; when the communication device 300 receives the frequency band switching message frame, the above interacting party is the frequency band switching message frame sender.
图4示出了根据本发明的一个实施例的频段切换方法的流程图。Fig. 4 shows a flowchart of a frequency band switching method according to an embodiment of the present invention.
如图4所示，根据本发明的一个实施例的频段切换方法，包括：步骤402，第一通信装置在第一频段中生成频段切换消息帧，所述频段切换消息帧至少包含第一切换时间点信息、所述第一通信装置所处的第一频段的信息和将要切换到的第二频段的信息；步骤404，所述第一通信装置在所述第一频段中向第二通信装置发送所述频段切换消息帧，以及在所述第一频段中接收所述频段切换消息帧的响应消息帧；其中，所述第二通信装置根据接收到的所述频段切换消息帧，生成并向所述第一通信装置发送所述频段切换消息帧的响应消息帧。在该技术方案中，第一通信装置和第二通信装置可以是手机或是平板，也可以是路由器等设备，通过相应通信装置中的芯片模块执行数据处理，并由信号收发装置以及天线等实现信号的收发。譬如，对于两个均处于第一频段（60GHz）的通信装置，当发现60GHz的通信频段过于繁忙时，可以由一方发送频段切换消息帧，与另一方进行协商，以实现共同切换至第二频段（45GHz）进行通信，其中第一切换时间点、通信装置所处的第一频段的信息以及将要切换到的第二频段的信息可以用信息元素IE（InformationElement）的形式封装在频段切换消息帧中，它们在频段切换消息帧中处于不同的位置域。As shown in FIG. 4, the frequency band switching method according to an embodiment of the present invention includes: step 402, the first communication device generates a frequency band switching message frame in the first frequency band, and the frequency band switching message frame includes at least the first switching time point information, the information of the first frequency band where the first communication device is located and the information of the second frequency band to be switched to; step 404, the first communication device transmits to the second communication device in the first frequency band The frequency band switching message frame, and a response message frame receiving the frequency band switching message frame in the first frequency band; wherein, the second communication device generates and sends to the frequency band switching message frame according to the received frequency band switching message frame The first communication device sends a response message frame to the frequency band switching message frame. In this technical solution, the first communication device and the second communication device may be mobile phones or tablets, or equipment such as routers, and data processing is performed through chip modules in the corresponding communication devices, and are realized by signal transceiver devices and antennas. Signal sending and receiving. For example, for two communication devices that are both in the first frequency band (60GHz), when the 60GHz communication frequency band is found to be too busy, one party can send a frequency band switching message frame and negotiate with the other party to achieve common switching to the second frequency band (45GHz) for communication, where the first switching time point, the information of the first frequency band where the communication device is located, and the information of the second frequency band to be switched to can be encapsulated in the frequency band switching message frame in the form of information element IE (InformationElement) , they are in different position fields in the band switching message frame.
在上述技术方案中，优选地，所述频段切换消息帧还包括：频段切换的超时信息和将要切换到的所述第二频段的工作信道信息。在该技术方案中，在频段切换消息帧中可以同时包含切换时间点信息和超时信息，从而当超出该设定的超时信息时，可以直接判定为切换失败，避免通信装置无限等待下去。同时，由于第二频段中可能包含有多个工作信道，因而通过告知第二频段的工作信道信息，使得同时切换频段的多个通信装置可以准确切换至相同的工作信道，避免无法建立连接，譬如，切换的超时信息可与切换的时间点处于同一域中，可以是由一个16比特位的二进制数组来标识“0000110000000011”，高八位标识切换的时间点，低八位表示切换的超时信息，其单位可以是10us，在这个具体例子中，标识超时的信息为30us，切换的工作信道可以和第二频段的信息处于同一个域中，它们可以是由一个8比特位的二进制数组来标识“00010011”，其中高4位标识切换到的频段信息，低4位标识切换到的频段信息的具体工作信道，在这个例子中，高4为“0001”表示切换的频段信息为45GHz，具体的工作信道为第3工作信道。当然不管是切换时间点、超时信息、第二频段的信息以及需要切换到的第二频段中的工作信道，它们都可以用不同的信息元素封装在频段切换消息帧中标识出来，也可以用不同于上述例子中的比特位长度来标识，这里不再赘述。In the above technical solution, preferably, the frequency band switching message frame further includes: timeout information of frequency band switching and working channel information of the second frequency band to be switched to. In this technical solution, the switching time point information and timeout information can be included in the frequency band switching message frame at the same time, so that when the set timeout information is exceeded, it can be directly determined that the switching fails, preventing the communication device from waiting indefinitely. At the same time, since the second frequency band may contain multiple working channels, by notifying the working channel information of the second frequency band, multiple communication devices that switch frequency bands at the same time can accurately switch to the same working channel to avoid failure to establish a connection, such as , the timeout information of switching can be in the same field as the time point of switching, which can be identified by a 16-bit binary array "0000110000000011", the high eight bits indicate the time point of switching, and the low eight bits represent the timeout information of switching, Its unit can be 10us. In this specific example, the timeout information is 30us. The switched working channel can be in the same domain as the information of the second frequency band. They can be identified by an 8-bit binary array " 00010011", where the upper 4 bits identify the frequency band information to be switched to, and the lower 4 bits identify the specific working channel of the frequency band information to be switched to. In this example, the upper 4 bits are "0001", indicating that the frequency band information to be switched to is 45GHz. The channel is the third working channel. Of course, regardless of the switching time point, timeout information, information of the second frequency band, and the working channel in the second frequency band to be switched to, they can all be marked in the frequency band switching message frame with different information elements, or can be marked with different information elements. It is identified by the bit length in the above example, and will not be repeated here.
在上述技术方案中，优选地，所述频段切换消息帧还包括：时间同步功能信息。在该技术方案中，通过加入TSF信息，使得共同切换频段的多个通信装置可以依此实现时间同步，以便建立通信连接。当然，如果所述多个通信装置在切换频段之前已经建立了连接，那么也可以不在频段切换消息帧中添加TSF信息，其中时间同步功能信息可以以信息元素的形式封装在频段切换消息帧中，由频段切换消息帧的发送者来提供，频段消息帧的接收者完全接收TSF信息，由此实现两者时间上的同步。In the above technical solution, preferably, the frequency band switching message frame further includes: time synchronization function information. In this technical solution, by adding TSF information, multiple communication devices that switch frequency bands together can achieve time synchronization so as to establish a communication connection. Of course, if the multiple communication devices have established connections before switching frequency bands, then the TSF information may not be added to the frequency band switching message frame, wherein the time synchronization function information may be encapsulated in the frequency band switching message frame in the form of information elements, It is provided by the sender of the frequency band switching message frame, and the receiver of the frequency band message frame completely receives the TSF information, thereby realizing time synchronization between the two.
在上述技术方案中，优选地，所述频段切换消息帧为管理消息帧、动作消息帧或控制消息帧，所述频段切换消息帧的响应消息帧为管理消息帧、动作消息帧或控制消息帧，在该技术方案中，当频段切换消息帧为管理消息帧时，其帧控制域的类型Type和子类型Subtype的联合值用来标识帧的类型，譬如可用“001000”来标识频段切换消息帧为管理消息帧；当频段切换消息帧为动作消息帧或控制消息帧时，其帧控制域的类型Type和子类型Subtype的联合值用来标识帧的类型，譬如可用“010110”来标识频段切换消息帧为动作消息帧或控制消息帧。对应的响应消息帧的情况与之相类似，此处不再赘述。In the above technical solution, preferably, the frequency band switching message frame is a management message frame, an action message frame or a control message frame, and the response message frame of the frequency band switching message frame is a management message frame, an action message frame or a control message frame , in this technical solution, when the frequency band switching message frame is a management message frame, the joint value of the type Type and the subtype Subtype of the frame control field is used to identify the type of the frame, for example, "001000" can be used to identify the frequency band switching message frame as Management message frame; when the frequency band switching message frame is an action message frame or a control message frame, the joint value of the type Type and the subtype Subtype of the frame control field is used to identify the type of the frame, for example, "010110" can be used to identify the frequency band switching message frame It is an action message frame or a control message frame. The situation of the corresponding response message frame is similar and will not be repeated here.
在上述技术方案中，优选地，还包括：所述频段切换消息帧的响应消息帧为所述频段切换消息帧的确认消息帧或所述频段切换消息帧的拒绝消息帧；其中，所述拒绝消息帧至少包括所述第二通信装置所推荐的第二切换时间点信息。在该技术方案中，若响应消息帧为确认消息帧，则频段切换消息帧的收发双方可以在约定的第一切换时间点实现频段切换；若响应消息帧为拒绝消息帧，则频段切换消息帧的收发双方可以在第二切换时间点实现频段切换，具体地第二切换时间点信息可以用IE的形式封装在拒绝消息帧中，可以是由一个8比特位的数组“00011111”来标识切换的时间点，当然也可用其它比特位长度的数组来标识，这里不再赘述。In the above technical solution, preferably, it further includes: the response message frame of the frequency band switching message frame is the confirmation message frame of the frequency band switching message frame or the rejection message frame of the frequency band switching message frame; wherein, the rejection The message frame includes at least information about the second switching time point recommended by the second communication device. In this technical solution, if the response message frame is a confirmation message frame, the sender and receiver of the frequency band switching message frame can realize the frequency band switching at the agreed first switching time point; if the response message frame is a rejection message frame, the frequency band switching message frame The sender and receiver can switch frequency bands at the second switching time point. Specifically, the second switching time point information can be encapsulated in the rejection message frame in the form of IE, and the switching can be identified by an 8-bit array "00011111" The time point, of course, can also be identified by an array of other bit lengths, which will not be repeated here.
在上述技术方案中，优选地，还包括：所述第一通信装置在所述第二频段中生成频段切换完成消息帧，所述频段切换完成消息帧至少包含所述第二频段的信道信息；所述第一通信装置在所述第二频段中向所述第二通信装置发送所述频段切换完成消息帧，以及在所述第二频段中接收所述频段切换完成消息帧的响应消息帧；其中，所述第二通信装置根据接收到的所述频段切换完成消息帧，生成并向所述第一通信装置发送所述频段切换完成消息帧的响应消息帧。在该技术方案中，为了保证后续的通信正常进行，当两者切换后，由频段切换消息帧的发送者在第二频段中发送频段切换完成消息帧用来确认频段切换消息帧的响应者是否已经切换到第二频段中，在这个频段切换完成帧中，它至少包含了第二频段的信息，可以用IE的形式封装在频段切换完成帧中，当然也可以以域的形式出现在频段切换完成帧中。In the above technical solution, preferably, further comprising: the first communication device generates a frequency band switching complete message frame in the second frequency band, and the frequency band switching complete message frame includes at least channel information of the second frequency band; The first communication device sends the frequency band switch complete message frame to the second communication device in the second frequency band, and receives a response message frame of the frequency band switch complete message frame in the second frequency band; Wherein, the second communication device generates and sends a response message frame to the frequency band switching completion message frame to the first communication device according to the received frequency band switching completion message frame. In this technical solution, in order to ensure the normal progress of subsequent communication, when the two are switched, the sender of the frequency band switching message frame sends a frequency band switching complete message frame in the second frequency band to confirm whether the responder of the frequency band switching message frame It has been switched to the second frequency band. In this frequency band switching completion frame, it contains at least the information of the second frequency band. It can be encapsulated in the frequency band switching completion frame in the form of IE, and of course it can also appear in the frequency band switching in the form of domains. Complete frame.
在上述技术方案中，优选地，还包括：所述频段切换完成消息帧的响应消息帧为确认消息帧。在该技术方案中，通过发送确认消息帧（ACK帧），从而在频段切换消息帧的收发双方确认已经完成了从第一频段向第二频段的切换，双方在完成频段切换完成以及确认后，就可以进行接下来的业务通信。In the above technical solution, preferably, it further includes: the response message frame of the frequency band switching completion message frame is a confirmation message frame. In this technical solution, by sending an acknowledgment message frame (ACK frame), the sender and receiver of the frequency band switch message frame confirm that the switch from the first frequency band to the second frequency band has been completed. After the completion and confirmation of the frequency band switch, The next business communication can be carried out.
在上述技术方案中，优选地，包括：当所述第一频段为60GHz的频段时，所述第二频段为45GHz的频段；以及当所述第一频段为45GHz的频段时，所述第二频段为60GHz的频段。在该技术方案中，对于802.11aj的设备，可以在45GHz和60GHz之间实现频段切换，从而在当前频段较为繁忙时，切换至另一个频段中进行通信。当然，对于其他通信协议和通信频段而言，显然也可以采用本发明的技术方案，从而实现多个通信装置的频段的切换操作。In the above technical solution, preferably, it includes: when the first frequency band is a 60GHz frequency band, the second frequency band is a 45GHz frequency band; and when the first frequency band is a 45GHz frequency band, the second The frequency band is the 60GHz frequency band. In this technical solution, for 802.11aj equipment, frequency band switching between 45 GHz and 60 GHz can be realized, so that when the current frequency band is relatively busy, it can be switched to another frequency band for communication. Of course, for other communication protocols and communication frequency bands, it is obvious that the technical solution of the present invention can also be adopted, so as to realize the switching operation of the frequency bands of multiple communication devices.
在上述技术方案中，优选地，还包括：在完成所述频段切换之后，所述第一通信装置和所述第二通信装置在所述第二频段执行会话密钥协商。在该技术方案中，若频段切换的多个通信装置在第一频段中已经建立连接，则当切换至第二频段后，可以不必执行会话密钥协商，而直接使用之前建立的连接的相关参数；若频段切换的多个通信装置在第一频段中并未建立连接，则当切换至第二频段后，需要通过会话密钥协商，以便建立连接。In the above technical solution, preferably, further comprising: after the frequency band switching is completed, the first communication device and the second communication device perform session key negotiation in the second frequency band. In this technical solution, if a plurality of communication devices that switch frequency bands have already established connections in the first frequency band, after switching to the second frequency band, it is not necessary to perform session key negotiation, but directly use the relevant parameters of the previously established connections ; If the multiple communication devices for frequency band switching have not established a connection in the first frequency band, after switching to the second frequency band, session key negotiation is required to establish a connection.
图5示出了根据本发明的实施例的切换频段的具体流程图。Fig. 5 shows a specific flow chart of switching frequency bands according to an embodiment of the present invention.
对于802.11aj的设备，在执行频段切换时，具体可能涉及到两种应用场景，下面结合图5分别针对每种场景进行详细说明。For 802.11aj devices, two application scenarios may be involved when performing frequency band switching, and each scenario will be described in detail below with reference to FIG. 5 .
场景一：两个802.11aj设备已经在45GHz或60GHz频段下建立连接，具体地，比如是DLS或TDLS连接；但由于当前所处的45GHz或60GHz频段较为繁忙，影响到设备间的工作效率，需要切换至另一频段，即60GHz或45GHz。Scenario 1: Two 802.11aj devices have established a connection in the 45GHz or 60GHz frequency band, specifically, a DLS or TDLS connection; but because the current 45GHz or 60GHz frequency band is relatively busy, which affects the work efficiency between the devices, it is necessary to Switch to another frequency band, 60GHz or 45GHz.
由于已经建立了DLS/TDLS，那么在切换到另外一个信道时就不需要考虑TSF以及会话密钥协商等过程。因此，在该场景下，只涉及到图5中的步骤502至步骤508。下面，以STAA和STAB之间的数据交互为例进行具体说明，其中，假定STAA和STAB都处于45GHz频段中。Since the DLS/TDLS has been established, there is no need to consider TSF and session key negotiation processes when switching to another channel. Therefore, in this scenario, only steps 502 to 508 in FIG. 5 are involved. In the following, the data exchange between STAA and STAB is taken as an example for specific description, where it is assumed that both STAA and STAB are in the 45GHz frequency band.
步骤502，由STAA发起M1信令，并发送至STAB，以实现信道切换的初始化。Step 502, the STAA initiates the M1 signaling and sends it to the STAB, so as to realize the initialization of channel switching.
具体地，比如这里的M1信令可以为“频段切换消息帧”。为了顺利地实现频段的切换，在M1信令中必须包含：切换的时间点、原工作频段信息、将要切换的工作频段信息。优选地，由于在一些情况下，STAB可能无法对STAA做出及时的响应，则为了避免STAA无限地等待下去，还可以在M1信令中添加超时信息；以及，每个工作频段中可能包含有多个具体的工作信道，因而在将要切换的工作频段信息中可以具体指明需要切换到的工作信道。Specifically, for example, the M1 signaling here may be a "frequency band switching message frame". In order to realize the switching of the frequency band smoothly, the M1 signaling must include: the time point of the switching, the information of the original working frequency band, and the information of the working frequency band to be switched. Preferably, since in some cases, STAB may not be able to respond to STAA in a timely manner, in order to avoid STAA from waiting indefinitely, timeout information may also be added to the M1 signaling; and, each working frequency band may contain There are multiple specific working channels, so the working channel to be switched to can be specified in the information of the working frequency band to be switched.
同时，上述信息可以由IE的形式封装在M1信令中，则封装后的切换时间点和超时信息的格式如图6所示：其中，ElementID由1个字节组成，可用“11111110”标识这个IE为切换时间点信息元素；Length标识这个IE的长度，由1个字节组成；Switchtime这个信息域由两部分组成，由2个字节组成，具体包括切换的时间点和切换过程的Timeout（超时信息），其中可用高8位标识切换时间点，低8位标识切换过程的Timeout。At the same time, the above information can be encapsulated in the M1 signaling in the form of IE, and the format of the encapsulated switching time point and timeout information is shown in Figure 6: Among them, ElementID consists of 1 byte, which can be identified by "11111110" IE is the switching time point information element; Length identifies the length of this IE and consists of 1 byte; the information field Switchtime consists of two parts, consisting of 2 bytes, specifically including the switching time point and the Timeout of the switching process ( Timeout information), where the upper 8 bits can be used to identify the switching time point, and the lower 8 bits can be used to identify the Timeout of the switching process.
封装后的切换信道信息的格式如图7所示：其中，ElementID由1个字节组成，可用“11111101”标识其为切换工作信道信息；Length标识这个IE的长度，由1个字节组成；SwitchingBand信息域包含两个信息，由2个字节组成，高四位标识现有工作信道，低四位标识将要切换到的工作信道。The format of the encapsulated switching channel information is shown in Figure 7: Among them, ElementID consists of 1 byte, which can be identified as switching working channel information by "11111101"; Length identifies the length of this IE and consists of 1 byte; The SwitchingBand information field contains two pieces of information, consisting of 2 bytes, the upper four bits identify the existing working channel, and the lower four bits identify the working channel to be switched to.
步骤504，STAB在接收到来自STAA发送的M1信令之后，生成相应的M2信令，实现信道切换初始化的响应。Step 504, after receiving the M1 signaling sent by the STAA, the STAB generates a corresponding M2 signaling to implement a response to channel switching initialization.
需要说明的是，由图5可以看出，M1和M2信令的交互过程都是在STAA和STAB原本所处的工作频段中完成的，也就是此处的45GHz下；而之后的步骤，比如步骤506、步骤508以及步骤510则都是在切换完成后的频段中实现的，比如此处的60GHz。It should be noted that, as can be seen from Figure 5, the interaction process of M1 and M2 signaling is completed in the original working frequency band where STAA and STAB are located, that is, at 45GHz here; and the subsequent steps, such as Step 506, step 508, and step 510 are all implemented in the frequency band after the handover is completed, such as 60GHz here.
步骤506，STAA生成M3信令，并发送至STAB，以告知其自身的信道切换完成。具体地，M3信令可以是一个工作帧。In step 506, STAA generates M3 signaling and sends it to STAB to inform itself of the completion of channel switching. Specifically, the M3 signaling may be a working frame.
步骤508，对应于接收到的来自STAA的M3信令，STAB生成M4信令，并发送至STAA，以作为M3信令的响应帧，实现信道切换完成确认。具体地，M4信令可以是ACK帧。Step 508: Corresponding to the received M3 signaling from STAA, STAB generates M4 signaling and sends it to STAA as a response frame of M3 signaling to realize channel switching completion confirmation. Specifically, the M4 signaling may be an ACK frame.
对于场景一而言，由于STAA和STAB在45GHz中已经建立连接，因而在切换至60GHz之后，仍可以使用原本建立的连接的一些参数，因此，在完成步骤708之后，即可实现两者在60GHz下的连接和通信。For Scenario 1, since STAA and STAB have already established a connection in 45GHz, some parameters of the originally established connection can still be used after switching to 60GHz. under Connections and Communications.
场景二：两个802.11aj设备尚未在45GHz或60GHz频段下建立连接；但由于当前所处的45GHz或60GHz频段较为繁忙，希望切换至另一频段（即60GHz或45GHz）之后，再建立连接。Scenario 2: Two 802.11aj devices have not yet established a connection in the 45GHz or 60GHz frequency band; but because the current 45GHz or 60GHz frequency band is relatively busy, it is hoped to switch to another frequency band (ie 60GHz or 45GHz) before establishing a connection.
此时，需要完成图5所示的步骤502至步骤510，其中，在步骤502至步骤508中，除了在M1信令中需要添加TSF信息，以便两个STA实现时间上的同步之外，其余的与场景一中相同，此处不再赘述。At this time, step 502 to step 510 shown in FIG. 5 need to be completed, wherein, in step 502 to step 508, except that TSF information needs to be added in M1 signaling so that the two STAs can achieve time synchronization, the rest It is the same as in Scenario 1 and will not be repeated here.
步骤510，由于STAA和STAB在45GHz下并没有建立连接，因此，为了在切换完成后，在60GHz下建立连接，两者需要进行会话密钥的协商，具体可以现有的802.1X的协议来完成协商。Step 510, since STAA and STAB have not established a connection at 45 GHz, in order to establish a connection at 60 GHz after the handover is completed, the two need to negotiate a session key, which can be accomplished using the existing 802.1X protocol negotiate.
以上结合附图详细说明了本发明的技术方案，考虑到相关技术中，支持多个频段的设备无法实现频段间的切换，因此，本发明提出了相应的通信装置和频段切换方法，可以使得802.11aj的设备能够在60GHz和45GHz之间切换工作，从较为繁忙频段切换至空闲的频段，以提高设备间的通信效率。The above describes the technical solution of the present invention in detail in conjunction with the accompanying drawings. Considering that in the related art, devices supporting multiple frequency bands cannot switch between frequency bands, the present invention proposes a corresponding communication device and a frequency band switching method, which can enable 802.11 aj's equipment can switch between 60GHz and 45GHz, switching from a relatively busy frequency band to an idle frequency band, so as to improve the communication efficiency between devices.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310076728.8ACN103152777B (en) | 2013-03-11 | 2013-03-11 | Communicator and frequency band switching method |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310076728.8ACN103152777B (en) | 2013-03-11 | 2013-03-11 | Communicator and frequency band switching method |
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| CN103152777A CN103152777A (en) | 2013-06-12 |
| CN103152777Btrue CN103152777B (en) | 2016-03-09 |
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| CN201310076728.8AActiveCN103152777B (en) | 2013-03-11 | 2013-03-11 | Communicator and frequency band switching method |
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