技术领域technical field
本发明属于无线通讯领域，涉及到一种在道路交通通信应用中的，面向应急通信、应急指挥的网络结构，以及实现移动终端的流动通信方法。The invention belongs to the field of wireless communication, and relates to a network structure oriented to emergency communication and emergency command in the application of road traffic communication, and a mobile terminal mobile communication method.
背景技术Background technique
近年来重大的交通安全事故层出不穷，而在事故现场往往比较混乱、人员众多，目前现场的指挥基本依赖对讲机、公众电信。对讲机可以解决语音指挥问题，但是其所用的频率是ISM波段，易受冲突和干扰，对讲机不能解决数据、图像的传输问题。而公众电信主要缺点是容量受限，难以在不同用户间进行区分业务优先级的资源调度。在紧急情况下，大量重要的指挥调度消息与普通民众的通信需求混杂竞争有限的资源。这两者都不能充分保障应急通信的有效、实时和多业务需求。In recent years, major traffic safety accidents have emerged one after another, and the scene of the accident is often chaotic and crowded with people. At present, the command on the scene basically relies on walkie-talkies and public telecommunications. The walkie-talkie can solve the problem of voice command, but the frequency it uses is the ISM band, which is prone to conflict and interference, and the walkie-talkie cannot solve the problem of data and image transmission. The main disadvantage of public telecommunications is limited capacity, which makes it difficult to perform resource scheduling that differentiates business priorities among different users. In emergency situations, a large number of important command and dispatch messages are mixed with the communication needs of ordinary people to compete for limited resources. Neither of them can fully guarantee the effective, real-time and multi-service requirements of emergency communication.
总之，随着公共无线通信的日益普及和发展，利用3G或未来的4G技术为智能交通提供通信支持，是一个重要的途径。但是，作为公众电信，其在专业领域的使用存在适应性差、费用高、带宽不能保证的缺陷，因此在应急现场，铺设专用的无线通信管道是必然之选。本专利就是基于这个背景而提出的组网和接入技术。In short, with the increasing popularity and development of public wireless communication, it is an important way to use 3G or future 4G technology to provide communication support for intelligent transportation. However, as public telecommunications, its use in professional fields has the disadvantages of poor adaptability, high cost, and unguaranteed bandwidth. Therefore, laying dedicated wireless communication pipelines is an inevitable choice at emergency sites. This patent is the networking and access technology proposed based on this background.
发明内容Contents of the invention
技术问题：为了更好地解决在智能交通应用中，车辆频繁运动带来的移动接入和网络运营管理的问题，本发明提出了一种可靠地解决在车载节点频繁移动导致的接入点切换和随之而来的IP接入问题，实现简单，无须改动TCP/IP协议栈，并可提高系统软件兼容性的面向道路应急无线接入的网络结构，以及采用这种网络结构的IP流动接入方法。Technical problem: In order to better solve the problems of mobile access and network operation management caused by frequent vehicle movement in intelligent transportation applications, the present invention proposes a reliable solution to access point switching caused by frequent movement of vehicle nodes And the subsequent IP access problem, it is simple to implement, without changing the TCP/IP protocol stack, and can improve the system software compatibility oriented network structure for road emergency wireless access, and the IP mobile access using this network structure input method.
技术方案：本发明的面向道路应急无线接入的网络结构，包括：Technical solution: The network structure oriented to road emergency wireless access of the present invention includes:
一个或多个具有与周边无线接入点通信能力的无线接入流动终端；One or more wireless access mobile terminals capable of communicating with surrounding wireless access points;
一个或多个布置在道路上或道路周边建筑中的无线接入点，用于接收来自无线接入流动终端的数据包，发送目的地址是无线接入流动终端的数据包、其它控制和配置信息；无线接入点通过由本地有线网(如以太网)或无线网组成的IP核心网与系统中其它部分用IP(IPV4或IPV6)协议互联；One or more wireless access points arranged on the road or in the buildings around the road are used to receive data packets from wireless access mobile terminals, and send data packets and other control and configuration information to the wireless access mobile terminal ;The wireless access point is interconnected with other parts of the system through IP (IPV4 or IPV6) protocol through the IP core network composed of local wired network (such as Ethernet) or wireless network;
一个用户账号用户实时状态服务器，用于记录预配置的用户信息，同时记录包括在线状态、当前登录位置在内的当前用户状态；A user account user real-time status server, used to record pre-configured user information, and record the current user status including online status and current login location;
一个或多个IP业务转发服务器，用于将目的地址为无线接入流动终端的IP包转发至无线接入流动终端当前接入的无线接入点；One or more IP service forwarding servers are used to forward the IP packet whose destination address is the wireless access mobile terminal to the wireless access point currently accessed by the wireless access mobile terminal;
一个支持IPV4或IPV6的IP核心网，用于在无线接入点、用户账号和用户实时状态服务器、IP业务转发服务器之间的通信。An IP core network supporting IPV4 or IPV6 is used for communication between wireless access points, user accounts and user real-time status servers, and IP service forwarding servers.
本发明的采用这种网络结构的IP流动接入方法，包括无线接入流动终端的数据包接收步骤和无线接入流动终端的接入位置更新步骤。无线接入流动终端数据包接收步骤中，数据包的接收依赖于IP业务转发服务器节点，IP业务转发服务器具有不止一个的网络接口，其中一个网络接口用于IP业务转发服务器分别与用户账号用户实时状态服务器和无线接入点进行IP通讯，其它接口连接到IP网络的路由器的端口上，每个路由器端口对应于一个IP网段，IP网段的地址分配给无线接入流动终端。The IP flow access method adopting the network structure of the present invention includes the step of receiving the data packet of the wireless access flow terminal and the step of updating the access location of the wireless access flow terminal. In the wireless access mobile terminal data packet receiving step, the reception of the data packet depends on the IP service forwarding server node. The IP service forwarding server has more than one network interface, and one of the network interfaces is used for the IP service forwarding server to communicate with the user account user in real time respectively. The status server and the wireless access point perform IP communication, and other interfaces are connected to the ports of the router of the IP network. Each router port corresponds to an IP network segment, and the address of the IP network segment is allocated to the wireless access mobile terminal.
无线接入流动终端的接入位置更新步骤中，无线接入流动终端在不同无线接入点之间切换时，保持无线接入流动终端位置的一致性，具体的方法为：通过无线接入点向用户账号用户实时状态服务器实时更新用户当前接入的无线接入点的信息，然后用户账号用户实时状态服务器向IP业务转发服务器实时推送无线接入流动终端的当前接入无线接入点的信息，从而实现网络中用户位置的一致性。In the step of updating the access location of the wireless access mobile terminal, when the wireless access mobile terminal is switched between different wireless access points, the consistency of the location of the wireless access mobile terminal is maintained. The specific method is: through the wireless access point Update the information of the wireless access point currently accessed by the user to the user account real-time status server in real time, and then the user account user real-time status server pushes the information of the current wireless access point of the wireless access mobile terminal to the IP service forwarding server in real time , so as to achieve the consistency of user location in the network.
有益效果：本发明与现有技术相比，具有以下优点：Beneficial effect: compared with the prior art, the present invention has the following advantages:
本发明技术方案在允许集中控制的网络中，支持终端在不同AP之间自动切换，可以保证IP地址不变化，保证无线接入流动终端对全IP业务的支持能力。但是系统未对切换中的数据包进行保护，适宜使用的场合为流动，终端在业务传输期间处于同一个AP覆盖范围，这对应急救援中的大多数场合都是适用的。而由于切换时间不长，对于差错不敏感的业务、在无线资源不紧张的情况下还是支持的。The technical scheme of the invention supports automatic switching of terminals between different APs in a network that allows centralized control, can ensure that the IP address does not change, and ensures the ability of wireless access mobile terminals to support all IP services. However, the system does not protect the data packets in switching, and the suitable occasion is mobility, and the terminal is in the coverage of the same AP during service transmission, which is applicable to most occasions in emergency rescue. And because the switching time is not long, the business that is not sensitive to errors is still supported when the wireless resources are not tight.
附图说明Description of drawings
图1是本发明中终端入网过程流程图；Fig. 1 is a flow chart of terminal network access process in the present invention;
图2是本发明中终端切换AP的流程图；Fig. 2 is the flowchart of terminal switching AP among the present invention;
图3是本发明中IP包的收发过程流程图；Fig. 3 is the flow chart of sending and receiving process of IP packet among the present invention;
图4是本发明中多用户下IP包的收发过程流程图；Fig. 4 is the flow chart of sending and receiving process of IP packet under multi-user in the present invention;
图5是本发明的系统总体框架结构图。Fig. 5 is a general frame structure diagram of the system of the present invention.
具体实施方式detailed description
下面结合附图和实施例，来进一步说明本发明技术方案。The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
本发明的面向道路应急无线接入的网络结构，包括：The network structure oriented to road emergency wireless access of the present invention includes:
一个或若干个具有与周边无线接入点通信能力的无线接入流动终端，其实际位置不固定，具有与周边无线接入点通信的能力，并通过无线接入点接入系统中的各类服务器。IP业务终端包括但不限于电脑、手机、嵌入式车载终端等。One or several wireless access mobile terminals with the ability to communicate with surrounding wireless access points, whose actual location is not fixed, have the ability to communicate with surrounding wireless access points, and access various types of terminals in the system through wireless access points server. IP service terminals include but are not limited to computers, mobile phones, embedded vehicle terminals, etc.
一个或若干个布置在道路上或道路周边建筑中的无线接入点，它布置在路边或者周边建筑中，用于接收来自无线接入流动终端的数据包，发送目的地址是无线接入流动终端的数据包、其它控制和配置信息；包括但不限于终端入网登记、位置登记与更新、IP地址配置等；一个AP至少拥有一个与终端通信的无线网络接口(记为AP-INTERFACE-W)，一个或若干个有线或无线的，与用户账号用户实时状态服务器通信的接口(记为AP-INTERFACE-L)。AP通过有线或无线网络接入到系统中。One or several wireless access points arranged on the road or in the surrounding buildings of the road, which are arranged on the roadside or in the surrounding buildings, are used to receive data packets from the wireless access mobile terminal, and the sending destination address is the wireless access mobile terminal. Terminal data packets, other control and configuration information; including but not limited to terminal network registration, location registration and update, IP address configuration, etc.; an AP has at least one wireless network interface for communication with the terminal (marked as AP-INTERFACE-W) , one or several wired or wireless interfaces (marked as AP-INTERFACE-L) for communicating with the user account user real-time status server. APs are connected to the system through wired or wireless networks.
一个用户账号用户实时状态服务器(URSS)，用于记录预配置的用户信息，包括但不限于认证信息、用户权限、IP地址信息等，同时记录当前用户状态，包括在线状态、当前登录位置等；A user account user real-time status server (URSS), used to record pre-configured user information, including but not limited to authentication information, user rights, IP address information, etc., and record the current user status, including online status, current login location, etc.;
一个或若干个IP业务转发服务器(IPTS)，用于将目的地址为终端地址的IP包转发至终端当前接入的接入点；One or several IP service forwarding servers (IPTS), used to forward the IP packet whose destination address is the terminal address to the access point currently accessed by the terminal;
一个支持IPV4或IPV6的IP网络，用于在无线接入点、用户账号用户实时状态服务器、IP业务转发服务器之间的通信；An IP network supporting IPV4 or IPV6 for communication between wireless access points, user account user real-time status servers, and IP service forwarding servers;
下文的系统初始化步骤和系统运行步骤(包括无线接入移动终端接收数据包过程、无线接入移动终端发送数据包过程、无线接入终端切换过程)详细描述了本发明的采用这种网络结构的IP流动接入实现方法。The following system initialization steps and system operation steps (including the process of receiving data packets by the wireless access mobile terminal, the process of sending data packets by the wireless access mobile terminal, and the switching process of the wireless access terminal) describe in detail the network structure of the present invention. Implementation method of IP mobile access.
一、系统运行初始化步骤1. System operation initialization steps
(1)对网络中的AP、URSS、IPTS进行初始配置，设置AP、URSS、IP业务转发服务器IPTS-INTERFACE-A网络接口的IP地址，保证三者之间可以进行正常IP通信；(1) Initially configure the AP, URSS, and IPTS in the network, and set the IP address of the IPTS-INTERFACE-A network interface of the AP, URSS, and IP service forwarding server to ensure normal IP communication between the three;
(2)配置URSS，登记或装入用户信息，启动一个应用层服务，等待来自接入点(AP)和IPTS的连接；(2) Configure URSS, register or load user information, start an application layer service, and wait for the connection from the access point (AP) and IPTS;
(3)将IPTS的若干IPTS-INTERFACE-B接口连接到对应的路由器端口，创建到URSS的TCP/IP连接，并启动一个应用层服务，等待来自接入点(AP)的连接；(3) Connect several IPTS-INTERFACE-B interfaces of IPTS to corresponding router ports, create a TCP/IP connection to URSS, and start an application layer service, waiting for a connection from an access point (AP);
(4)AP启动，创建一个到URSS的TCP/IP连接，并从URSS下载各移动终端网段对应的IPTS服务器地址和端口列表，每个终端网段为一个表项；(4) AP starts, creates a TCP/IP connection to URSS, and downloads the IPTS server address and port list corresponding to each mobile terminal network segment from URSS, and each terminal network segment is an entry;
(5)当有移动终端开机后，通过无线链路控制层向所接入的AP发送登录请求；(5) When a mobile terminal is turned on, send a login request to the accessed AP through the wireless link control layer;
(6)该请求被AP转发至URSS；(6) The request is forwarded to the URSS by the AP;
(7)URSS进行用户认证后，将预配置的IP(如固定IP的终端)、或实时分配的IP地址、或者如果发生了切换将切换前的IP地址，以及其它网络参数传递给AP转交终端，完成终端初始IP地址参数的初始化。URSS同时将该用户的当前状态及所接入的AP通知该终端对应的IPTS；(7) After URSS authenticates the user, it will pass the pre-configured IP (such as a terminal with a fixed IP), or the IP address allocated in real time, or the IP address before the switch if a switch occurs, and other network parameters to the AP handover terminal to complete the initialization of the initial IP address parameter of the terminal. URSS notifies the corresponding IPTS of the terminal of the user's current status and the accessed AP at the same time;
(8)IPTS接收到其管辖的终端的新位置，进行本地登记、建表备查；(8) IPTS receives the new location of the terminal under its jurisdiction, performs local registration, and builds a table for future reference;
(9)AP将接受到的地址参数转交终端，同时AP建立一个到该终端所在子网IPTS服务器的TCP/IP连接，如果已经有连接则不新建连接；(9) The AP transfers the received address parameters to the terminal, and at the same time, the AP establishes a TCP/IP connection to the IPTS server of the subnet where the terminal is located, and does not create a new connection if there is already a connection;
(10)终端利用收到的地址就行TCP/IP协议栈参数初始化，如果收到的地址与之前相同则不动作。(10) The terminal uses the received address to initialize the parameters of the TCP/IP protocol stack. If the received address is the same as before, no action is taken.
二、系统运行步骤2. System operation steps
终端发送IP包的过程：The process of the terminal sending IP packets:
(1)终端产生一个IP包时，源IP是自身的IP(设为IPS)，目的IP为对端的IP(设为IPD)，该包由终端交给接入的AP处理；(1) When the terminal generates an IP packet, the source IP is its own IP (set as IPS), and the destination IP is the IP of the opposite end (set as IPD), and the packet is handed over to the access AP by the terminal for processing;
(2)AP从无线接口AP-INTERFACE-W接收到，并将此包经过AP的AP-INTERFACE-L转发出去；(2) The AP receives it from the wireless interface AP-INTERFACE-W, and forwards the packet through the AP's AP-INTERFACE-L;
(3)该包被网络里面的路由器接收到，并被正常路由到该包的目的节点。(3) The packet is received by the router in the network, and is normally routed to the destination node of the packet.
终端接收IP包的过程：The process of terminal receiving IP packets:
(1)对端发出IP包，源IP为IPD，目的地址为IPS；(1) The peer sends an IP packet, the source IP is IPD, and the destination address is IPS;
(2)该IP包被路由器接收到，并路由至IPS的对应网段；(2) The IP packet is received by the router and routed to the corresponding network segment of the IPS;
(3)该网段相连的IPTS其某个IPTS-INTERFACE-B接口得到，随后IPTS根据该IP包的目的地址查询目前该终端所处的AP地址，将这个IP数据包通过其IPTS-INTERFACE-A接口以IP隧道的方式利用先前AP与IPTS的连接传输给AP。(3) The IPTS connected to the network segment is obtained from an IPTS-INTERFACE-B interface, and then the IPTS queries the current AP address of the terminal according to the destination address of the IP packet, and passes the IP data packet through its IPTS-INTERFACE- The A interface uses the previous connection between the AP and the IPTS to transmit to the AP in the form of an IP tunnel.
(4)该AP将IP包由AP-INTERFACE-W接口转发给终端；(4) The AP forwards the IP packet to the terminal through the AP-INTERFACE-W interface;
(5)终端接收到一个来自对端的源地址为IPD，目的地址为自身(IPS)的数据包，完成IP包的接收操作。(5) The terminal receives a data packet whose source address is IPD and destination address is itself (IPS) from the opposite end, and completes the receiving operation of the IP packet.
终端切换过程：Terminal switching process:
(1)终端由于移动等原因导致原接入AP(记为AP1)信号减弱，终端重新搜索当前信号最佳的AP，并经过无线链路控制层协议切换至新的AP(记为AP2)；(1) The signal of the original access AP (denoted as AP1) is weakened due to movement and other reasons, and the terminal searches for the AP with the best current signal again, and switches to the new AP (denoted as AP2) through the wireless link control layer protocol;
(2)AP2上触发一个事件，AP2向URSS汇报终端位置变更；(2) An event is triggered on AP2, and AP2 reports the terminal location change to URSS;
(3)URSS收到终端位置变更消息后，在URSS上触发两个事件，一个是向该终端对应的IPTS服务器(记为IPTS-T)更新终端新位置，一个向终端原先接入的AP1发出用户脱离消息；(3) After the URSS receives the terminal location change message, it triggers two events on the URSS, one is to update the new location of the terminal to the IPTS server corresponding to the terminal (denoted as IPTS-T), and the other is to send a message to the AP1 originally connected to the terminal. user exit message;
(4)IPTS-T更新用户当前接入的AP地址由AP1更新至AP2；(4) IPTS-T updates the AP address currently accessed by the user from AP1 to AP2;
(5)AP1完成终端离开的后续清理工作。(5) AP1 completes the follow-up cleaning work of the terminal leaving.
附图1描述了终端入网工作过程。为简便起见，图中未画出IPTS的IPTS-INTERFACE-A接口的连接，下同。图中URSS给T1预分配了地址10.1.1.2，掩码为255.255.255.0，为简化起见省略了网关及DNS配置。其中各步骤的说明如下：①终端T1发现无线接入点AP1，并向AP1发起入网请求；②AP1将此请求转交给URSS，URSS鉴权完毕后，读取预分配的IP地址(10.1.1.2)(如果终端切换，则再次分配之前的IP地址)，同时在自身数据库中查询该IP地址对应的IPTS服务器地址IPTS1；③由于IPTS1已经与URSS预建立了一个连接，URSS通过该连接通知T1的新位置(AP1)；④IPTS1回送确认；⑤URSS向AP1传送地址及确认消息；⑥AP1向T1回送地址(10.1.1.2)和确认消息。Figure 1 describes the working process of terminal network access. For simplicity, the connection of the IPTS-INTERFACE-A interface of the IPTS is not shown in the figure, the same below. In the figure, URSS pre-assigns address 10.1.1.2 to T1, mask is 255.255.255.0, gateway and DNS configuration are omitted for simplicity. The description of each step is as follows: ①The terminal T1 discovers the wireless access point AP1, and initiates a network access request to AP1; ②AP1 forwards the request to URSS, and after the URSS authentication is completed, it reads the pre-assigned IP address (10.1.1.2) (If the terminal is switched, the previous IP address will be assigned again), and at the same time query the IPTS server address IPTS1 corresponding to the IP address in its own database; ③Since IPTS1 has pre-established a connection with URSS, URSS will notify T1 of the new IP address through this connection Location (AP1); ④ IPTS1 returns confirmation; ⑤ URSS sends address and confirmation message to AP1; ⑥ AP1 returns address (10.1.1.2) and confirmation message to T1.
附图2描述了终端切换过程，图中T1终端原先接入的是AP1。与图1相比，处理流程基本相同，无线接入点变成了AP2，由于发生了切换，因此额外通知原先接入AP1，此终端已经脱离。与附图1相比，多出的⑦和⑧步骤为：⑦URSS通知AP1无线接入流动终端T1脱离AP1；⑧AP1回送URSS确认消息。Figure 2 describes the terminal switching process. In the figure, the T1 terminal originally connected to AP1. Compared with Figure 1, the processing flow is basically the same, the wireless access point becomes AP2, and because of the handover, it is additionally notified that the terminal that was originally connected to AP1 has left. Compared with Fig. 1, the extra steps ⑦ and ⑧ are: ⑦ URSS notifies AP1 that wireless access mobile terminal T1 leaves AP1; ⑧ AP1 returns URSS confirmation message.
附图3以查询气象与路况为例给出了移动节点进行IP数据收发的过程。其中各步骤说明如下：①终端产生查询请求，IP的源地址为T1的地址，IP的目的地址为气象与路况服务器的地址；②AP2将该IP包从其某个AP-INTERFACE-L接口发送出去，并进IP核心网路由至气象与路况服务器；③气象与路况服务器接收到该包后，产生响应消息，响应消息的源地址为气象服务器的地址，目的地址为10.1.1.2(T1的IP地址)，该IP包被正常路由到路由器的10.1.1.0/24接口，并被与之相连的IPTS1接收得到；④IPTS1从URSS推送的终端位置得知该目的IP在AP2处，IPTS1查询AP2的连接，并把完整IP数据包转交给AP2；⑤AP2解出完整数据包，并从AP-INTERFACE-W网络接口发送给T1。Figure 3 shows the process of sending and receiving IP data by the mobile node by taking the query of weather and road conditions as an example. The steps are described as follows: ①The terminal generates a query request, the source address of the IP is the address of T1, and the destination address of the IP is the address of the weather and traffic server; ②AP2 sends the IP packet out of one of its AP-INTERFACE-L interfaces , and enter the IP core network to route to the weather and road condition server; ③ After the weather and road condition server receives the packet, it generates a response message, the source address of the response message is the address of the weather server, and the destination address is 10.1.1.2 (the IP address of T1) , the IP packet is normally routed to the 10.1.1.0/24 interface of the router, and is received by the connected IPTS1; ④ IPTS1 knows that the destination IP is at AP2 from the terminal location pushed by URSS, IPTS1 queries the connection of AP2, and Transfer the complete IP data packet to AP2; ⑤ AP2 decodes the complete data packet and sends it to T1 from the AP-INTERFACE-W network interface.
附图4描述了多个用户终端同时访问某个服务器的情况。该图说明了，不同的终端访问服务器时，服务器的响应消息回程路径。由于T1和T2的网段不同，服务器发送给他们的数据包分别路由到不同的网段，并被不同的IPTS处理。Accompanying drawing 4 has described the situation that multiple user terminals access a certain server at the same time. This figure illustrates the return path of the server's response message when different terminals access the server. Since the network segments of T1 and T2 are different, the data packets sent by the server to them are routed to different network segments and processed by different IPTS.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210576328.9ACN103067535B (en) | 2012-12-26 | 2012-12-26 | Towards network structure and the mobile cut-in method of IP of road emergency wireless access |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210576328.9ACN103067535B (en) | 2012-12-26 | 2012-12-26 | Towards network structure and the mobile cut-in method of IP of road emergency wireless access |
| Publication Number | Publication Date |
|---|---|
| CN103067535A CN103067535A (en) | 2013-04-24 |
| CN103067535Btrue CN103067535B (en) | 2016-05-04 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210576328.9AExpired - Fee RelatedCN103067535B (en) | 2012-12-26 | 2012-12-26 | Towards network structure and the mobile cut-in method of IP of road emergency wireless access |
| Country | Link |
|---|---|
| CN (1) | CN103067535B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106875705B (en)* | 2017-02-23 | 2020-10-20 | 上海赛可电子商务有限公司 | Road accident rescue system and implementation method thereof |
| CN110621053B (en)* | 2019-06-06 | 2022-09-09 | 珠海全志科技股份有限公司 | Network distribution method, network distribution device and electronic equipment |
| CN114697970A (en)* | 2022-04-02 | 2022-07-01 | 辽宁工控科技有限公司 | Wireless network system for tunnel type scene |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316168A (en)* | 1999-06-28 | 2001-10-03 | 诺基亚网络有限公司 | Location management for cellular system |
| CN1341311A (en)* | 1999-02-22 | 2002-03-20 | B·G·罗伯特 | Wireless Communications Network Containing Multiple Mobile Access Nodes |
| CN1838829A (en)* | 2005-03-25 | 2006-09-27 | 朗迅科技公司 | Method and apparatus for seamless roaming for wireless networks |
| CN101998367A (en)* | 2009-08-21 | 2011-03-30 | 中兴通讯股份有限公司 | Management method for local network protocol access connection and mobility management entities |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1341311A (en)* | 1999-02-22 | 2002-03-20 | B·G·罗伯特 | Wireless Communications Network Containing Multiple Mobile Access Nodes |
| CN1316168A (en)* | 1999-06-28 | 2001-10-03 | 诺基亚网络有限公司 | Location management for cellular system |
| CN1838829A (en)* | 2005-03-25 | 2006-09-27 | 朗迅科技公司 | Method and apparatus for seamless roaming for wireless networks |
| CN101998367A (en)* | 2009-08-21 | 2011-03-30 | 中兴通讯股份有限公司 | Management method for local network protocol access connection and mobility management entities |
| Publication number | Publication date |
|---|---|
| CN103067535A (en) | 2013-04-24 |
| Publication | Publication Date | Title |
|---|---|---|
| EP4008128B1 (en) | Configuration of time sensitive bridge during handover | |
| KR100272567B1 (en) | Mobile Internet in Mobile Communication Network | |
| CN100561956C (en) | Heterogeneous Mobile Radio System | |
| CN105813153B (en) | Inter-network switch method, network element and system | |
| US20100309881A1 (en) | Mobile communication system and tunnel management method thereof | |
| CN101222752B (en) | Group node switching method, group node-based communication system, and group node controller | |
| CN106686572B (en) | SDN-based mobility management method | |
| WO2014086280A1 (en) | Method, device and system for processing wireless network user access | |
| CN114079613B (en) | A communication method and related equipment | |
| WO2011026392A1 (en) | Method and system for acquiring route strategies | |
| US20110047612A1 (en) | Method for Network Access, Related Network and Computer Program Product Therefor | |
| KR20170133793A (en) | Method and system of signaling procedure for mobile communication core network | |
| WO2021128482A1 (en) | Method for realizing pdt packet cross-system interconnection | |
| CN104255062A (en) | Communication system, and path control method | |
| CN107148061B (en) | LTE and WLAN heterogeneous network switching system and method based on SDN | |
| JP4472537B2 (en) | Packet control apparatus, authentication server, and wireless communication system | |
| CN104735734A (en) | Service handling method, network controller and forwarding device | |
| WO2023226946A1 (en) | Communication method and system, and wireless access device and access controller | |
| CN103067535B (en) | Towards network structure and the mobile cut-in method of IP of road emergency wireless access | |
| CN101516085B (en) | Route rule updating method and device and communication system | |
| CN104053199B (en) | Method, handover management device and wireless network in wireless local inter-network handover | |
| KR100400719B1 (en) | Mobile Internet in Mobile communication Network and Communication Method Thereof | |
| CN102282807A (en) | Method, device and system for realizing local routing | |
| CN104113930A (en) | Method of realizing termination connection, and system of realizing termination connection | |
| JP2012156796A (en) | Communication system, communication terminal, gateway, communication method, and program |
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20160504 Termination date:20211226 |