CN113079582A - Random access method and device - Google Patents
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及通信技术领域，尤其涉及一种随机接入方法及装置。The present invention relates to the field of communication technologies, and in particular, to a random access method and device.
背景技术Background technique
在5G NR中，终端(User Equipment，UE)选择物理随机接入信道时频资源(PRACHOccasion，RO)发送随机接入前导码。在R15中通过格式表格规定了RO的时域格式，通过参数规定了频域上RO与同步信号块(Synchronization Signal and PBCH block，SSB)的映射关系。图1为现有技术中SSB与RO的映射关系示意图，如图1所示，频域上RO和SSB的映射关系可以是多对一，也可以是一对一，也可以是一对多。In 5G NR, a terminal (User Equipment, UE) selects a physical random access channel time-frequency resource (PRACHOccasion, RO) to send a random access preamble. In R15, the time domain format of the RO is specified by the format table, and the mapping relationship between the RO and the synchronization signal block (Synchronization Signal and PBCH block, SSB) in the frequency domain is specified by parameters. FIG. 1 is a schematic diagram of the mapping relationship between SSB and RO in the prior art. As shown in FIG. 1 , the mapping relationship between RO and SSB in the frequency domain may be many-to-one, one-to-one, or one-to-many.
现有技术中，UE选择其中的1个SSB映射的RO来传输随机接入前导码，每个RO上承载的随机接入前导码范围根据参数CB-PreamblePerSSB来确定，如果是多个SSB映射1个RO，那么这些RO上承载的随机接入前导码索引的起始索引号是不同的。In the prior art, the UE selects one of the ROs mapped by the SSB to transmit the random access preamble, and the range of the random access preamble carried on each RO is determined according to the parameter CB-PreamblePerSSB. If multiple SSBs are mapped to 1 ROs, then the starting index numbers of the random access preamble indexes carried on these ROs are different.
针对独立NR-U系统，UE先接收SSB，对于能够接收到的频域SSB进行先听后说(Listen Before Talk，LBT)，选择一个成功的SSB映射的RO发送两步随机接入的消息A，消息A中包含随机接入前导码和消息负荷(Msg A payload)。基站gNB通过RO接收消息A，在PUSCH上接收消息负荷，检测成功后进行后续流程。For the independent NR-U system, the UE first receives the SSB, performs Listen Before Talk (LBT) for the received SSB in the frequency domain, and selects a successful SSB-mapped RO to send a two-step random access message A. , the message A contains a random access preamble and a message payload (Msg A payload). The base station gNB receives the message A through the RO, receives the message load on the PUSCH, and performs subsequent procedures after the detection is successful.
但是，采用现有技术中的方案，由于无线信道的干扰因素较多，在受到干扰时，容易出现gNB接收不到消息A，导致gNB接收消息A的成功率较低。However, with the solution in the prior art, since there are many interference factors in the wireless channel, it is easy for the gNB to fail to receive the message A when the wireless channel is interfered, resulting in a low success rate of the gNB receiving the message A.
发明内容SUMMARY OF THE INVENTION
本发明实施例提供一种随机接入方法及装置，用于解决现有技术中的上述技术问题。Embodiments of the present invention provide a random access method and device, which are used to solve the above technical problems in the prior art.
为了解决上述技术问题，一方面，本发明实施例提供一种随机接入方法，包括：In order to solve the above technical problems, on the one hand, an embodiment of the present invention provides a random access method, including:
若在频域上先听后说LBT成功的同步信号块SSB个数大于等于2，则同时在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A；If the number of synchronization signal blocks SSBs for which LBT is successful after listening is heard in the frequency domain is greater than or equal to 2, then at the same time, message A is sent on the physical random access channel time-frequency resource RO mapped by each SSB;
等待接收基站下发的随机接入响应消息。Waiting to receive the random access response message sent by the base station.
进一步地，在每一RO上发送的消息A中包含的随机接入前导码的索引值都相同。Further, the index value of the random access preamble contained in the message A sent on each RO is the same.
进一步地，所述在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A之前，还包括：Further, before sending the message A on the physical random access channel time-frequency resource RO mapped by each SSB, the method further includes:
确定消息A中包含的随机接入前导码的索引值。Determine the index value of the random access preamble contained in message A.
进一步地，所述在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A之前，还包括：Further, before sending the message A on the physical random access channel time-frequency resource RO mapped by each SSB, the method further includes:
根据前导码索引值和RO的起始时域信息，确定消息A中包含的无线网络临时标识RNTI。According to the preamble index value and the starting time domain information of the RO, the wireless network temporary identifier RNTI contained in the message A is determined.
进一步地，通过如下公式确定消息A中包含的RNTI：Further, the RNTI contained in the message A is determined by the following formula:
RNTI＝1+s_id+14*t_id+index+14*80*8*ul_carrier_idRNTI=1+s_id+14*t_id+index+14*80*8*ul_carrier_id
其中，s_id为RO的第一个正交频分复用OFDM符号的索引，t_id为系统帧中RO的第一个时隙的索引，index是前导码索引值，ul_carrier_id为用于传输随机接入前导码的上行载波类型指示符。Among them, s_id is the index of the first OFDM symbol of the RO, t_id is the index of the first time slot of the RO in the system frame, index is the preamble index value, and ul_carrier_id is used for transmitting random access Upstream carrier type indicator for the preamble.
另一方面，本发明实施例提供一种随机接入方法，包括：On the other hand, an embodiment of the present invention provides a random access method, including:
接收来自不同RO上的消息A；Receive message A from different ROs;
若每一RO上的消息A均由同一终端发送，则基于每一RO上消息A的接收功率进行随机接入响应。If the message A on each RO is sent by the same terminal, a random access response is performed based on the received power of the message A on each RO.
再一方面，本发明实施例提供一种终端，包括：In another aspect, an embodiment of the present invention provides a terminal, including:
发送模块，用于若在频域上先听后说LBT成功的同步信号块SSB个数大于等于2，则同时在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A；The sending module is used to send message A on the physical random access channel time-frequency resource RO mapped by each SSB at the same time if the number of synchronization signal blocks SSB for which the LBT is successful is heard first and then said in the frequency domain;
等待模块，用于等待接收基站下发的随机接入响应消息。The waiting module is used for waiting to receive the random access response message sent by the base station.
又一方面，本发明实施例提供一种基站，包括：In another aspect, an embodiment of the present invention provides a base station, including:
接收模块，用于接收来自不同RO上的消息A；a receiving module for receiving messages A from different ROs;
响应模块，用于若每一RO上的消息A均由同一终端发送，则基于每一RO上消息A的接收功率进行随机接入响应。The response module is configured to perform a random access response based on the received power of the message A on each RO if the message A on each RO is sent by the same terminal.
又一方面，本发明实施例提供一种电子设备，包括：存储器、处理器，以及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时，实现上述方法的步骤。In another aspect, an embodiment of the present invention provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program , implement the steps of the above method.
又一方面，本发明实施例提供一种非暂态计算机可读存储介质，其上存储有计算机程序，当所述计算机程序被处理器执行时，实现上述方法的步骤。In yet another aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are implemented.
本发明实施例提供的随机接入方法及装置，在NR-U系统随机接入流程中充分利用频域资源，终端在所有可用的SSB映射的RO上发送相同的消息A，达到相同时间尽可能利用频域的目的，提高了基站接收消息A的成功概率。The random access method and device provided by the embodiments of the present invention make full use of frequency domain resources in the random access process of the NR-U system, and the terminal sends the same message A on all available SSB-mapped ROs to achieve the same time as possible. The purpose of utilizing the frequency domain improves the success probability of the base station receiving the message A.
附图说明Description of drawings
图1为现有技术中SSB与RO的映射关系示意图；1 is a schematic diagram of the mapping relationship between SSB and RO in the prior art;
图2为本发明实施例提供的随机接入方法示意图；FIG. 2 is a schematic diagram of a random access method provided by an embodiment of the present invention;
图3为本发明实施例提供的前导码范围选择示意图；3 is a schematic diagram of a preamble range selection provided by an embodiment of the present invention;
图4为本发明另一实施例提供的随机接入方法示意图；FIG. 4 is a schematic diagram of a random access method provided by another embodiment of the present invention;
图5为本发明实施例提供的终端示意图；FIG. 5 is a schematic diagram of a terminal provided by an embodiment of the present invention;
图6为本发明实施例提供的基站示意图；FIG. 6 is a schematic diagram of a base station provided by an embodiment of the present invention;
图7为本发明实施例提供的电子设备的结构示意图。FIG. 7 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention.
具体实施方式Detailed ways
为了使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.
5G NR-U,全称5G NR in Unlicensed Spectrum，即工作于非授权频谱的5G NR。包括授权频谱辅助接入(LAA)NR-U和独立(Stand-alone)NR-U两种模式。5G NR-U, the full name of 5G NR in Unlicensed Spectrum, is 5G NR working in unlicensed spectrum. Including licensed spectrum assisted access (LAA) NR-U and independent (Stand-alone) NR-U two modes.
独立NR-U模式有以下特点：Standalone NR-U mode has the following features:
1、非授权频段时域不能随时保证可用。使用LBT技术，在占用信道前要先进行空闲信道评估，LBT成功，则信道空闲，可以连续占用用来传输消息，传输的最大时长存在限制；LBT失败，则不能进行传输。1. The time domain of unlicensed frequency bands cannot be guaranteed to be available at any time. Using LBT technology, an idle channel evaluation must be performed before occupying a channel. If the LBT is successful, the channel is idle and can be continuously occupied to transmit messages. There is a limit to the maximum duration of transmission; if LBT fails, transmission cannot be performed.
2、非授权频段有充裕的可用带宽。2. Unlicensed frequency bands have ample available bandwidth.
与5G NR相比，NR-U最大的特性和挑战都来自于对LBT机制的支持和LBT失败带来的影响。在该系统中，随机接入流程中UE和gNB之间进行消息交互，由于只有LBT成功才能发送消息，所以相比于4步随机接入，2步随机接入由于减少了UE和gNB的交互次数，更利于UE尽快完成随机接入。Compared with 5G NR, the biggest features and challenges of NR-U come from the support of LBT mechanism and the impact of LBT failure. In this system, messages are exchanged between the UE and the gNB in the random access process. Since the message can only be sent if the LBT is successful, the 2-step random access reduces the interaction between the UE and the gNB compared to the 4-step random access. The number of times is more conducive to the UE to complete the random access as soon as possible.
2步随机接入过程涉及消息A和消息B，其中，消息A是UE向gNB发送的消息，包括承载在物理随机接入信道(Physical Random Access Channel，PRACH)上的随机接入前导码，以及承载在物理上行共享信道(Physical Uplink Shared Channel，PUSCH)上的消息A中的消息负荷(Msg A payload)。2步随机接入中前导码和4步随机接入中的前导码配置方式相同。The 2-step random access procedure involves message A and message B, where message A is a message sent by the UE to the gNB, including the random access preamble carried on the Physical Random Access Channel (PRACH), and The message payload (Msg A payload) in message A carried on the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH). The preamble in the 2-step random access and the preamble in the 4-step random access are configured in the same way.
在独立NR-U模式下，UE先接收SSB，对于能够接收到的频域SSB进行LBT，选择成功的一个SSB根据RO配置发送前导序列和消息A中的消息负荷。gNB通过RO接收消息A，在PUSCH上接收消息负荷，检测成功后进行后续流程。In the independent NR-U mode, the UE first receives the SSB, performs LBT on the SSB in the frequency domain that can be received, and selects a successful SSB to send the preamble sequence and the message load in the message A according to the RO configuration. The gNB receives the message A through the RO, receives the message load on the PUSCH, and performs the subsequent process after the detection is successful.
但是，采用现有技术中的方案，由于无线信道的干扰因素较多，在受到干扰时，容易出现gNB接收不到消息A，导致gNB接收消息A的成功率较低。However, with the solution in the prior art, since there are many interference factors in the wireless channel, it is easy for the gNB to fail to receive the message A when the wireless channel is interfered, resulting in a low success rate of the gNB receiving the message A.
为了解决上述技术问题，本发明实施例提供一种随机接入方法，在NR-U系统随机接入流程中充分利用频域资源，终端在所有可用的SSB映射的RO上发送相同的消息A，达到相同时间尽可能利用频域的目的，提高了基站接收消息A的成功概率。In order to solve the above technical problem, the embodiment of the present invention provides a random access method. In the random access process of the NR-U system, frequency domain resources are fully utilized, and the terminal sends the same message A on all available ROs mapped by SSB, To achieve the purpose of using the frequency domain as much as possible at the same time, the success probability of the base station receiving the message A is improved.
图2为本发明实施例提供的随机接入方法示意图，如图2所示，本发明实施例提供一种随机接入方法，其执行主体为终端，例如，手机等。该方法包括：FIG. 2 is a schematic diagram of a random access method provided by an embodiment of the present invention. As shown in FIG. 2 , an embodiment of the present invention provides a random access method, the execution subject of which is a terminal, such as a mobile phone. The method includes:
步骤S201、若在频域上先听后说LBT成功的同步信号块SSB个数大于等于2，则同时在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A。Step S201 , if the number of synchronization signal blocks SSBs for which LBT is successful is greater than or equal to 2 in the frequency domain, message A is simultaneously sent on the physical random access channel time-frequency resource RO mapped by each SSB.
具体来说，在独立NR-U模式下，UE先接收SSB，对于能够接收到的频域SSB进行LBT。Specifically, in the independent NR-U mode, the UE receives the SSB first, and performs LBT on the frequency domain SSB that can be received.
若在频域上LBT成功的SSB个数大于等于2时，则UE同时在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A。If the number of SSBs for which LBT is successful in the frequency domain is greater than or equal to 2, the UE simultaneously sends message A on the physical random access channel time-frequency resource RO mapped by each SSB.
例如，UE在频域上LBT成功的SSB数目是M，选择LBT时干扰能量最低的N个SSB映射的RO承载消息A。N个消息A同时发送，N大于等于2。消息A包括承载在PRACH上的前导码，以及承载在PUSCH上的消息A中的消息负荷。For example, the number of SSBs for which the UE succeeds in LBT in the frequency domain is M, and the ROs mapped by the N SSBs with the lowest interference energy when selecting LBT carry message A. N messages A are sent at the same time, and N is greater than or equal to 2. Message A includes the preamble carried on PRACH, and the message payload in Message A carried on PUSCH.
步骤S202、等待接收基站下发的随机接入响应消息。Step S202, waiting for the random access response message sent by the base station to be received.
具体来说，UE通过多个RO发出消息A之后，等待接收gNB下发的随机接入响应消息。Specifically, after sending the message A through multiple ROs, the UE waits to receive the random access response message sent by the gNB.
gNB同时接收到来自不同的RO上的消息A时，根据消息A中的消息负荷携带的用户身份信息，判断这些消息A是否来自同一个用户，如果是来自同一个用户，gNB根据接收功率以及下一步的LBT结果选择回复消息B的频段。When the gNB receives messages A from different ROs at the same time, it judges whether these messages A come from the same user according to the user identity information carried in the message payload of the message A. The one-step LBT result selects the frequency band for replying to message B.
gNB向UE发送随机接入响应消息之前，需要对消息A进行解析，若gNB既成功接收解码前导码preamble，也成功解码Msg A payload，则需返回成功响应消息，其内容包含类似于4步随机接入过程中的Msg 2和Msg 4内容(即用于解决多个UE冲突的竞争解决信息)，UE收到gNB返回的成功响应则判断2步随机接入成功。Before the gNB sends the random access response message to the UE, it needs to parse the message A. If the gNB successfully receives and decodes the preamble preamble and successfully decodes the Msg A payload, it needs to return a successful response message, the content of which is similar to the 4-step random The content of Msg 2 and
若gNB仅成功解码preamble，而未成功解码Msg A payload，则需返回回落(fallback)响应消息，UE收到回落响应，则判断2步随机接入失败，进而回落到4步随机接入过程，发送Msg 3。If the gNB only successfully decodes the preamble, but fails to decode the Msg A payload, it needs to return a fallback response message. The UE receives the fallback response and determines that the 2-step random access fails, and then falls back to the 4-step random access process. Send Msg 3.
若gNB既未成功解码preamble，也未解码Msg A payload，则可不返回任何响应消息，当随机接入响应接收窗口超时后，UE判断随机接入失败，尝试重新发送Msg A。If the gNB has neither successfully decoded the preamble nor the Msg A payload, it may not return any response message. When the random access response receiving window times out, the UE determines that the random access has failed and tries to resend the Msg A.
本发明实施例提供的随机接入方法，在NR-U系统随机接入流程中充分利用频域资源，终端在所有可用的SSB映射的RO上发送相同的消息A，达到相同时间尽可能利用频域的目的，提高了基站接收消息A的成功概率。In the random access method provided by the embodiment of the present invention, the frequency domain resources are fully utilized in the random access procedure of the NR-U system, and the terminal sends the same message A on all available SSB-mapped ROs, so that the frequency can be utilized as much as possible at the same time. The purpose of the domain is to improve the success probability of the base station receiving message A.
基于上述任一实施例，进一步地，在每一RO上发送的消息A中包含的随机接入前导码的索引值都相同。Based on any of the foregoing embodiments, further, the index values of the random access preambles included in the message A sent on each RO are the same.
具体来说，在本发明实施例中，UE通过每一RO发送的消息A中包含的随机接入前导码的索引值都相同，以保证gNB在不同的RO上接收到的消息A完全相同。Specifically, in the embodiment of the present invention, the index values of the random access preambles included in the message A sent by the UE through each RO are the same to ensure that the messages A received by the gNB on different ROs are identical.
本发明实施例提供的随机接入方法，在NR-U系统随机接入流程中充分利用频域资源，终端在所有可用的SSB映射的RO上发送相同的消息A，达到相同时间尽可能利用频域的目的，提高了基站接收消息A的成功概率。In the random access method provided by the embodiment of the present invention, the frequency domain resources are fully utilized in the random access procedure of the NR-U system, and the terminal sends the same message A on all available SSB-mapped ROs, so that the frequency can be utilized as much as possible at the same time. The purpose of the domain is to improve the success probability of the base station receiving message A.
基于上述任一实施例，进一步地，所述在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A之前，还包括：Based on any of the foregoing embodiments, further, before sending the message A on the physical random access channel time-frequency resource RO mapped by each SSB, the method further includes:
确定消息A中包含的随机接入前导码的索引值。Determine the index value of the random access preamble contained in message A.
具体来说，高层通过参数ssb-perRACH-OccasionAndCB-PreamblesPerSS B配置N(L1参数：SSB-per-rach-occasion)个SSB关联一个RO(频域)，和每个SSB在每个有效PRACHoccasion上基于竞争的preamble数(L1参数：CB-preambles-per-SSB)。其中对于N的配置有如下两种：Specifically, the upper layer configures N (L1 parameter: SSB-per-rach-occasion) SSBs associated with one RO (frequency domain) through the parameter ssb-perRACH-OccasionAndCB-PreamblesPerSS B, and each SSB is based on each valid PRACHoccasion based on The number of competing preambles (L1 parameter: CB-preambles-per-SSB). There are two configurations for N as follows:
如果N<1，则一个SSB映射到1/N个连续有效的RO(频域)，例如，N＝1/8，则一个SSB映射8个RO，且R个连续索引的preamble映射到SSBn，0<＝n<＝N-1，每个有效RO从preamble索引0开始。例如，N＝1/8，则一个SSB映射8个RO，那么一个SSB中有8个preamble索引为0的起始点，因为一个RO对应一个preamble索引为0的起始点。。If N<1, then one SSB is mapped to 1/N consecutive valid ROs (frequency domain), for example, N=1/8, then one SSB is mapped to 8 ROs, and the preambles of R consecutive indices are mapped to SSBn, 0<=n<=N-1, each valid RO starts from preamble index 0. For example, if N=1/8, then one SSB maps 8 ROs, then there are 8 starting points whose preamble index is 0 in one SSB, because one RO corresponds to one starting point whose preamble index is 0. .
如果N>＝1，R个连续索引的preamble映射到SSBn，0<＝n<＝N-1，每个有效RO从preamble索引
1)当n＝0时，在SSB0的preamble索引从0开始；1) When n=0, the preamble index in SSB0 starts from 0;
2)当n＝1时，在SSB1的preamble索引从32开始；2) When n=1, the preamble index in SSB1 starts from 32;
3)SSB0上的preamble索引为0～31，SSB1上的preamble索引为32～所配置竞争preamble-1；3) The preamble index on SSB0 is 0 to 31, and the preamble index on SSB1 is 32 to the configured competition preamble-1;
4)一个有效RO对应整个竞争preamble数，此时一个有效RO覆盖两个SSB，所以两个SSB各占部分preamble，与N<1不一样。4) One valid RO corresponds to the entire number of competing preambles. At this time, one valid RO covers two SSBs, so the two SSBs each occupy part of the preamble, which is different from N<1.
其中，
因此，在本发明实施例中，UE在每一SSB映射的RO上均发送消息A之前，还需要先确定消息A中包含的随机接入前导码的索引值。Therefore, in the embodiment of the present invention, before the UE sends the message A on the RO mapped by each SSB, the index value of the random access preamble contained in the message A needs to be determined first.
图3为本发明实施例提供的前导码范围选择示意图，如图3所示，SSB和RO的映射是一对一或者多时，每个SSB的范围都是一致的，此时UE选择相同的前导码索引。FIG. 3 is a schematic diagram of preamble range selection provided by an embodiment of the present invention. As shown in FIG. 3 , when the mapping between SSB and RO is one-to-one or multiple, the range of each SSB is the same, and the UE selects the same preamble at this time. code index.
当SSB和RO的映射是多对一时，UE选择可用的多个SSB中的第一个的前导码索引范围作为自己的选择范围，并且在这些SSB上使用相同的前导码索引发送前导码。When the mapping of SSB and RO is many-to-one, the UE selects the preamble index range of the first of the available multiple SSBs as its own selection range, and transmits the preamble using the same preamble index on these SSBs.
本发明实施例提供的随机接入方法，在NR-U系统随机接入流程中充分利用频域资源，终端在所有可用的SSB映射的RO上发送相同的消息A，达到相同时间尽可能利用频域的目的，提高了基站接收消息A的成功概率。In the random access method provided by the embodiment of the present invention, the frequency domain resources are fully utilized in the random access procedure of the NR-U system, and the terminal sends the same message A on all available SSB-mapped ROs, so that the frequency can be utilized as much as possible at the same time. The purpose of the domain is to improve the success probability of the base station receiving message A.
基于上述任一实施例，进一步地，所述在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A之前，还包括：Based on any of the foregoing embodiments, further, before sending the message A on the physical random access channel time-frequency resource RO mapped by each SSB, the method further includes:
根据前导码索引值和RO的起始时域信息，确定消息A中包含的无线网络临时标识RNTI。According to the preamble index value and the starting time domain information of the RO, the wireless network temporary identifier RNTI contained in the message A is determined.
具体来说，在本发明实施例中，在消息A中，通过PUSCH传输的消息负荷紧跟前导码。在不同的RO上传输的消息A是完全一致的，包括RNTI。在独立模式的NR-U中，消息A的消息负荷包含的RNTI的值与之前发送的前导码的索引值、起始时域信息有关。Specifically, in the embodiment of the present invention, in message A, the message load transmitted through the PUSCH immediately follows the preamble. Message A transmitted on different ROs is completely consistent, including RNTI. In the NR-U of the independent mode, the value of the RNTI included in the message payload of the message A is related to the index value of the previously sent preamble and the starting time domain information.
因此，在每一SSB映射的RO上均发送消息A之前，还需要根据前导码索引值和RO的起始时域信息，确定消息A中包含的RNTI。Therefore, before the message A is sent on the RO mapped by each SSB, the RNTI included in the message A also needs to be determined according to the preamble index value and the starting time domain information of the RO.
本发明实施例提供的随机接入方法，在NR-U系统随机接入流程中充分利用频域资源，终端在所有可用的SSB映射的RO上发送相同的消息A，达到相同时间尽可能利用频域的目的，提高了基站接收消息A的成功概率。In the random access method provided by the embodiment of the present invention, the frequency domain resources are fully utilized in the random access procedure of the NR-U system, and the terminal sends the same message A on all available SSB-mapped ROs, so that the frequency can be utilized as much as possible at the same time. The purpose of the domain is to improve the success probability of the base station receiving message A.
基于上述任一实施例，进一步地，通过如下公式确定消息A中包含的RNTI：Based on any of the above embodiments, further, the RNTI included in the message A is determined by the following formula:
RNTI＝1+s_id+14*t_id+index+14*80*8*ul_carrier_idRNTI=1+s_id+14*t_id+index+14*80*8*ul_carrier_id
其中，s_id为RO的第一个正交频分复用OFDM符号的索引，t_id为系统帧中RO的第一个时隙的索引，index是前导码索引值，ul_carrier_id为用于传输随机接入前导码的上行载波类型指示符。Among them, s_id is the index of the first OFDM symbol of the RO, t_id is the index of the first time slot of the RO in the system frame, index is the preamble index value, and ul_carrier_id is used for transmitting random access Upstream carrier type indicator for the preamble.
具体来说，在本发明实施例中，根据前导码索引值和RO的起始时域信息，确定消息A中包含的RNTI的方式采用如下公式：Specifically, in the embodiment of the present invention, according to the preamble index value and the starting time domain information of the RO, the following formula is used to determine the RNTI included in the message A:
RNTI＝1+s_id+14*t_id+index+14*80*8*ul_carrier_idRNTI=1+s_id+14*t_id+index+14*80*8*ul_carrier_id
其中，s_id为RO的第一个正交频分复用OFDM符号的索引，0≤s_id<14，t_id为系统帧中RO的第一个时隙的索引，0≤t_id<80，index是前导码索引值，0≤index<64，ul_carrier_id为用于传输随机接入前导码的上行载波类型指示符，ul_carrier_id的值为0表示NUL载波，ul_carrier_id的值为1表示SUL载波。Among them, s_id is the index of the first OFDM symbol of RO, 0≤s_id<14, t_id is the index of the first time slot of RO in the system frame, 0≤t_id<80, index is the preamble Code index value, 0≤index<64, ul_carrier_id is the uplink carrier type indicator used to transmit the random access preamble, the value of ul_carrier_id is 0 for NUL carrier, and the value of ul_carrier_id is 1 for SUL carrier.
本发明实施例提供的随机接入方法，在NR-U系统随机接入流程中充分利用频域资源，终端在所有可用的SSB映射的RO上发送相同的消息A，达到相同时间尽可能利用频域的目的，提高了基站接收消息A的成功概率。In the random access method provided by the embodiment of the present invention, the frequency domain resources are fully utilized in the random access procedure of the NR-U system, and the terminal sends the same message A on all available SSB-mapped ROs, so that the frequency can be utilized as much as possible at the same time. The purpose of the domain is to improve the success probability of the base station receiving message A.
基于上述任一实施例，图4为本发明另一实施例提供的随机接入方法示意图，如图4所示，本发明实施例提供一种随机接入方法，其执行主体为基站。该方法包括：Based on any of the above embodiments, FIG. 4 is a schematic diagram of a random access method provided by another embodiment of the present invention. As shown in FIG. 4 , an embodiment of the present invention provides a random access method, the execution subject of which is a base station. The method includes:
步骤S401、接收来自不同RO上的消息A。Step S401: Receive message A from different ROs.
步骤S402、若每一RO上的消息A均由同一终端发送，则基于每一RO上消息A的接收功率进行随机接入响应。Step S402: If the message A on each RO is sent by the same terminal, perform a random access response based on the received power of the message A on each RO.
具体来说，在独立NR-U模式下，UE先接收SSB，对于能够接收到的频域SSB进行LBT。Specifically, in the independent NR-U mode, the UE receives the SSB first, and performs LBT on the frequency domain SSB that can be received.
若在频域上LBT成功的SSB个数大于等于2时，则UE同时在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A。If the number of SSBs for which LBT is successful in the frequency domain is greater than or equal to 2, the UE simultaneously sends message A on the physical random access channel time-frequency resource RO mapped by each SSB.
例如，UE在频域上LBT成功的SSB数目是M，选择LBT时干扰能量最低的N个SSB映射的RO承载消息A。N个消息A同时发送，N大于等于2。消息A包括承载在PRACH上的前导码，以及承载在PUSCH上的消息A中的消息负荷。For example, the number of SSBs that the UE succeeds in LBT in the frequency domain is M, and the ROs mapped by the N SSBs with the lowest interference energy during LBT are selected to carry message A. N messages A are sent at the same time, and N is greater than or equal to 2. Message A includes the preamble carried on PRACH, and the message payload in Message A carried on PUSCH.
gNB接收来自不同RO上的消息A。gNB receives message A from different ROs.
gNB同时接收到来自不同的RO上的消息A时，根据消息A中的消息负荷携带的用户身份信息，判断这些消息A是否来自同一个用户，如果是来自同一个用户，gNB根据接收功率以及下一步的LBT结果选择回复消息B的频段。When the gNB receives messages A from different ROs at the same time, it judges whether these messages A come from the same user according to the user identity information carried in the message payload of the message A. The one-step LBT result selects the frequency band for replying to message B.
gNB向UE发送随机接入响应消息之前，需要对消息A进行解析，若gNB既成功接收解码前导码preamble，也成功解码Msg A payload，则需返回成功响应消息，其内容包含类似于4步随机接入过程中的Msg 2和Msg 4内容(即用于解决多个UE冲突的竞争解决信息)，UE收到gNB返回的成功响应则判断2步随机接入成功。Before the gNB sends the random access response message to the UE, it needs to parse the message A. If the gNB successfully receives and decodes the preamble preamble and successfully decodes the Msg A payload, it needs to return a successful response message, the content of which is similar to the 4-step random The content of Msg 2 and
若gNB仅成功解码preamble，而未成功解码Msg A payload，则需返回回落(fallback)响应消息，UE收到回落响应，则判断2步随机接入失败，进而回落到4步随机接入过程，发送Msg 3。If the gNB only successfully decodes the preamble, but fails to decode the Msg A payload, it needs to return a fallback response message. The UE receives the fallback response and determines that the 2-step random access fails, and then falls back to the 4-step random access process. Send Msg 3.
若gNB既未成功解码preamble，也未解码Msg A payload，则可不返回任何响应消息，当随机接入响应接收窗口超时后，UE判断随机接入失败，尝试重新发送Msg A。If the gNB has neither successfully decoded the preamble nor the Msg A payload, it may not return any response message. When the random access response receiving window times out, the UE determines that the random access has failed and tries to resend the Msg A.
本发明实施例提供的随机接入方法，在NR-U系统随机接入流程中充分利用频域资源，终端在所有可用的SSB映射的RO上发送相同的消息A，达到相同时间尽可能利用频域的目的，提高了基站接收消息A的成功概率。In the random access method provided by the embodiment of the present invention, the frequency domain resources are fully utilized in the random access procedure of the NR-U system, and the terminal sends the same message A on all available SSB-mapped ROs, so that the frequency can be utilized as much as possible at the same time. The purpose of the domain is to improve the success probability of the base station receiving message A.
基于上述任一实施例，图5为本发明实施例提供的终端示意图，如图5所示，本发明实施例提供一种终端，例如，手机等。该终端包括发送模块501和等待模块502，其中：Based on any of the foregoing embodiments, FIG. 5 is a schematic diagram of a terminal provided by an embodiment of the present invention. As shown in FIG. 5 , an embodiment of the present invention provides a terminal, such as a mobile phone. The terminal includes a sending
发送模块501用于若在频域上先听后说LBT成功的同步信号块SSB个数大于等于2，则同时在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A；等待模块502用于等待接收基站下发的随机接入响应消息。The sending
本发明实施例提供一种终端，用于执行上述任一实施例中执行主体为终端的方法，通过本实施例提供的装置执行上述某一实施例中所述的方法的具体步骤与上述相应实施例相同，此处不再赘述。An embodiment of the present invention provides a terminal for executing the method in any of the foregoing embodiments in which the execution subject is a terminal, and the specific steps of executing the method described in one of the foregoing embodiments by using the apparatus provided in this embodiment are the same as those of the foregoing corresponding implementations. The same example is not repeated here.
本发明实施例提供的终端，在NR-U系统随机接入流程中充分利用频域资源，终端在所有可用的SSB映射的RO上发送相同的消息A，达到相同时间尽可能利用频域的目的，提高了基站接收消息A的成功概率。The terminal provided by the embodiment of the present invention makes full use of frequency domain resources in the random access process of the NR-U system, and the terminal sends the same message A on all available SSB-mapped ROs, so as to achieve the purpose of using the frequency domain as much as possible at the same time , which increases the success probability of the base station receiving message A.
基于上述任一实施例，图6为本发明实施例提供的基站示意图，如图6所示，本发明实施例提供一种基站，该基站包括接收模块601和响应模块602，其中：Based on any of the foregoing embodiments, FIG. 6 is a schematic diagram of a base station provided by an embodiment of the present invention. As shown in FIG. 6 , an embodiment of the present invention provides a base station. The base station includes a receiving
接收模块601用于接收来自不同RO上的消息A；响应模块602用于若每一RO上的消息A均由同一终端发送，则基于每一RO上消息A的接收功率进行随机接入响应。The receiving
本发明实施例提供一种基站，用于执行上述任一实施例中执行主体为基站的方法，通过本实施例提供的装置执行上述某一实施例中所述的方法的具体步骤与上述相应实施例相同，此处不再赘述。An embodiment of the present invention provides a base station for executing the method in any of the foregoing embodiments in which the execution subject is a base station, and the specific steps of executing the method described in one of the foregoing embodiments by using the apparatus provided in this embodiment are the same as those of the foregoing corresponding implementations The same example is not repeated here.
本发明实施例提供的基站，在NR-U系统随机接入流程中充分利用频域资源，终端在所有可用的SSB映射的RO上发送相同的消息A，达到相同时间尽可能利用频域的目的，提高了基站接收消息A的成功概率。The base station provided by the embodiment of the present invention makes full use of frequency domain resources in the random access procedure of the NR-U system, and the terminal sends the same message A on all available ROs mapped by SSB, so as to achieve the purpose of using the frequency domain as much as possible at the same time , which increases the success probability of the base station receiving message A.
图7为本发明实施例提供的电子设备的结构示意图，如图7所示，该电子设备包括：处理器(processor)701、通信接口(Communications Interface)702、存储器(memory)703和通信总线704，其中，处理器701，通信接口702，存储器703通过通信总线704完成相互间的通信。处理器701和存储器702通过总线703完成相互间的通信。处理器701可以调用存储器703中的逻辑指令，以执行如下方法：FIG. 7 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. As shown in FIG. 7 , the electronic device includes: a processor (processor) 701, a communication interface (Communications Interface) 702, a memory (memory) 703, and a
若在频域上先听后说LBT成功的同步信号块SSB个数大于等于2，则同时在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A；等待接收基站下发的随机接入响应消息。If the number of synchronization signal blocks SSBs for which LBT is successful after listening in the frequency domain is greater than or equal to 2, then send message A on the physical random access channel time-frequency resource RO mapped by each SSB at the same time; wait for the receiving base station to deliver Random Access Response message.
或者如下方法：Or the following method:
接收来自不同RO上的消息A；若每一RO上的消息A均由同一终端发送，则基于每一RO上消息A的接收功率进行随机接入响应。Receive messages A from different ROs; if the messages A on each RO are sent by the same terminal, a random access response is performed based on the received power of the messages A on each RO.
此外，上述的存储器中的逻辑指令可以通过软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。In addition, the above-mentioned logic instructions in the memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .
进一步地，本发明实施例提供一种计算机程序产品，所述计算机程序产品包括存储在非暂态计算机可读存储介质上的计算机程序，所述计算机程序包括程序指令，当所述程序指令被计算机执行时，计算机能够执行上述各方法实施例中的步骤，例如包括：Further, an embodiment of the present invention provides a computer program product, where the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer When executed, the computer can execute the steps in the above method embodiments, for example, including:
若在频域上先听后说LBT成功的同步信号块SSB个数大于等于2，则同时在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A；等待接收基站下发的随机接入响应消息。If the number of synchronization signal blocks SSBs for which LBT is successful after listening in the frequency domain is greater than or equal to 2, then send message A on the physical random access channel time-frequency resource RO mapped by each SSB at the same time; wait for the receiving base station to deliver Random Access Response message.
或者如下方法：Or the following method:
接收来自不同RO上的消息A；若每一RO上的消息A均由同一终端发送，则基于每一RO上消息A的接收功率进行随机接入响应。Receive messages A from different ROs; if the messages A on each RO are sent by the same terminal, a random access response is performed based on the received power of the messages A on each RO.
进一步地，本发明实施例提供一种非暂态计算机可读存储介质，其上存储有计算机程序，当所述计算机程序被处理器执行时，实现上述各方法实施例中的步骤，例如包括：Further, an embodiment of the present invention provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps in the above method embodiments are implemented, for example, including:
若在频域上先听后说LBT成功的同步信号块SSB个数大于等于2，则同时在每一SSB映射的物理随机接入信道时频资源RO上均发送消息A；等待接收基站下发的随机接入响应消息。If the number of synchronization signal blocks SSBs for which LBT is successful after listening in the frequency domain is greater than or equal to 2, then send message A on the physical random access channel time-frequency resource RO mapped by each SSB at the same time; wait for the receiving base station to deliver Random Access Response message.
或者如下方法：Or the following method:
接收来自不同RO上的消息A；若每一RO上的消息A均由同一终端发送，则基于每一RO上消息A的接收功率进行随机接入响应。Receive messages A from different ROs; if the messages A on each RO are sent by the same terminal, a random access response is performed based on the received power of the messages A on each RO.
以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性的劳动的情况下，即可以理解并实施。The device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到各实施方式可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件。基于这样的理解，上述技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如ROM/RAM、磁碟、光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行各个实施例或者实施例的某些部分所述的方法。From the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on this understanding, the above-mentioned technical solutions can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic A disc, an optical disc, etc., includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments or some parts of the embodiments.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
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