CN106455012B - Power off service personnel's end to end communication method - Google Patents
Power off service personnel's end to end communication method Download PDFInfo
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Abstract
Description
技术领域technical field
本发明涉及断电检修人员端对端通信技术。The invention relates to an end-to-end communication technology for power-off maintenance personnel.
背景技术Background technique
电力线路检修是指线路各侧开关均处于冷备用或检修状态且线路出线刀闸均在断开位置，或与线路相连接的所有刀闸均为断开位置，线路不带电；线路高抗高压侧刀闸拉开，线路PT低压侧断开，线路各侧接地刀闸在合上位置(或挂好接地线)；若无特殊要求，线路保护停运；有串补装置的线路，串补装置应在冷备用或检修状态。Power line maintenance means that the switches on each side of the line are in the cold standby or maintenance state and the line outlet switches are all in the off position, or all the knife switches connected to the line are in the off position, the line is not live; the line is highly resistant to high voltage The side knife switch is opened, the PT low-voltage side of the line is disconnected, and the grounding knife switch on each side of the line is in the closed position (or the grounding wire is hung); if there is no special requirement, the line protection will stop; for lines with series compensation devices, series compensation The device should be in cold standby or maintenance state.
但目前，对于线路检修的人员的工作地点很多情况下，是在信号条件较差的地方，检修人员之间的端对端通信可靠性较差。But at present, in many cases, the working place of the line maintenance personnel is in a place with poor signal conditions, and the end-to-end communication reliability between the maintenance personnel is poor.
发明内容Contents of the invention
本发明是为了解决线路检修人员的端对端通信过程中，通信可靠性差的问题，从而提供一种断电检修人员端对端通信方法。The invention aims to solve the problem of poor communication reliability in the end-to-end communication process of line maintenance personnel, thereby providing an end-to-end communication method for power-off maintenance personnel.
断电检修人员端对端通信方法，它包括以下步骤：The end-to-end communication method for power outage maintenance personnel includes the following steps:
步骤一、给每个拟参与通信的线路检修人员身上安装一个无线通信设备，并记为一个节点AP；Step 1. Install a wireless communication device on each line maintenance personnel who intends to participate in the communication, and record it as a node AP;
步骤二、在控制中心内部存入各小区的无线网络布设及各种无线网络强弱的历史数据，并按由强至弱的顺序列表；Step 2. Store the wireless network layout of each community and the historical data of the strength of various wireless networks in the control center, and list them in order from strong to weak;
步骤三、在一个通信周期内，若某节点AP拟发起端对端通信，则该节点AP向控制中心发送端对端通信请求数据包，所述端对端通信请求数据包包括：自身ID、另一通信节点的ID、当前坐标的经度和纬度、拟通信的业务类型；Step 3. In a communication cycle, if a certain node AP intends to initiate end-to-end communication, the node AP sends an end-to-end communication request packet to the control center, and the end-to-end communication request packet includes: its own ID, The ID of another communication node, the longitude and latitude of the current coordinates, and the type of business to be communicated;
步骤四、控制中心接收该通信请求数据包，根据读取端对端通信请求数据包中的另一通信节点的ID，并向该另一通信节点的发送询问数据包，所述询问数据包包括：发起节点的ID、是否同意与其端对端通信；Step 4, the control center receives the communication request packet, reads the ID of another communication node in the end-to-end communication request packet, and sends an inquiry packet to the other communication node, the inquiry packet includes : The ID of the initiating node, whether it agrees to communicate with it peer-to-peer;
步骤五、另一通信节点接收该询问数据包，若其同意进行该端对端通信，则向控制中心回复应答数据包，所述应答数据包包括：自身ID、同意与发起节点ID的端对端通信、自身的坐标的经度和纬度；若另一通信节点不同意进行该端对端通信，则丢弃该询问数据包；Step 5. Another communication node receives the query data packet, and if it agrees to carry out the end-to-end communication, it replies with a response data packet to the control center, and the response data packet includes: its own ID, the end-to-end agreement with the initiating node ID end-to-end communication, the longitude and latitude of its own coordinates; if another communication node does not agree to carry out the end-to-end communication, then discard the inquiry data packet;
步骤六、控制中心等待一个时间周期，若在该时间周期内，未收到另一通信节点的应答数据包，则终止该次端对端通信；若在该时间周期内，收到另一通信节点的应答数据包，则读取应答数据包中的坐标的经度和纬度，选择信号强度排在前两位的网络备选；Step 6. The control center waits for a time period. If it does not receive a response packet from another communication node within the time period, it terminates the end-to-end communication; if it receives another communication node within the time period For the response data packet of the node, read the longitude and latitude of the coordinates in the response data packet, and select the network option with the first two digits in signal strength;
步骤七、控制中心读取端对端通信请求数据包中的坐标的经度和纬度读取步骤二中的无线网络强弱的历史数据，选择信号强度排在前两位的网络备选；Step 7, the control center reads the longitude and latitude of the coordinates in the end-to-end communication request packet, reads the historical data of the strength of the wireless network in step 2, and selects the network whose signal strength ranks in the first two places as an alternative;
步骤八、控制中心判断步骤六和步骤七中的四个备选网络是否有重合的网络，若有，则舍弃其中之一；Step 8. The control center judges whether the four candidate networks in Step 6 and Step 7 have overlapped networks, and if so, discards one of them;
步骤九、控制中心判断步骤八中的剩余的备选网络是两个还是三个，若是三个，则舍弃信号强度最弱的一个，并将该两个作为备选网络，并执行步骤十；若是两个，则将该两个作为备选网络，并执行步骤十；Step 9, the control center judges whether the remaining candidate networks in step 8 are two or three, if there are three, discard the one with the weakest signal strength, and use these two as candidate networks, and perform step ten; If there are two, use the two as alternative networks, and perform step ten;
步骤十、控制中心读取端对端通信请求数据包中的拟通信的业务类型，判断是否为实时性业务，如果判断结果为是，则执行步骤十零一；如果判断结果为否，则执行步骤十零二；Step 10. The control center reads the business type to be communicated in the end-to-end communication request packet, and judges whether it is a real-time business. If the judgment result is yes, then execute step 101; if the judgment result is no, then execute Step ten and two;
步骤十零一、选择信号强度最高的无线网络作为终选网络，并执行步骤十一；Step 101, select the wireless network with the highest signal strength as the final selection network, and execute step 11;
步骤十零二、选择信号强度第二高的无线网络作为终选网络，并执行步骤十一；Step 102, select the wireless network with the second highest signal strength as the final network, and execute step 11;
步骤十一、控制中心根据端对端通信请求数据包中的ID和应答数据包中另一通信节点的ID，同时向发起节点和另一通信节点发送网络分配数据包，所述网络分配数据包包括：终选网络；Step 11, the control center sends a network distribution data packet to the initiating node and another communication node at the same time according to the ID in the end-to-end communication request data packet and the ID of another communication node in the response data packet, and the network distribution data packet Including: final selection network;
步骤十二、控制中心、发起节点与另一通信节点切换至终选网络，进行端对端通信。Step 12: The control center, the initiating node and another communication node switch to the final network for end-to-end communication.
步骤十一中，控制中心向发起节点和另一通信节点发送网络分配数据包中还包括：备选网络；控制中心、发起节点与另一通信节点改变业务类型，三方切换至备选网络中进行端对端通信。In step 11, the network allocation data packet sent by the control center to the initiating node and another communication node also includes: an alternative network; the control center, the initiating node and another communication node change the service type, and the three parties switch to the alternative network to carry out Peer-to-peer communication.
第二种断电检修人员端对端通信方法，其特征是：它包括以下步骤：The second end-to-end communication method for power-off maintenance personnel is characterized in that it includes the following steps:
步骤一、给每个拟参与通信的线路检修人员身上安装一个无线通信设备，并记为一个节点AP；Step 1. Install a wireless communication device on each line maintenance personnel who intends to participate in the communication, and record it as a node AP;
步骤二、在控制中心内部存入各小区的无线网络布设及各种无线网络强弱的历史数据，并按由强至弱的顺序列表；Step 2. Store the wireless network layout of each community and the historical data of the strength of various wireless networks in the control center, and list them in order from strong to weak;
步骤三、在一个通信周期内，若某节点AP拟发起端对端通信，则该节点AP向控制中心发送端对端通信请求数据包，所述端对端通信请求数据包包括：自身ID、每一通信节点的ID、当前坐标的经度和纬度、拟通信的业务类型；Step 3. In a communication cycle, if a certain node AP intends to initiate end-to-end communication, the node AP sends an end-to-end communication request packet to the control center, and the end-to-end communication request packet includes: its own ID, The ID of each communication node, the longitude and latitude of the current coordinates, and the type of business to be communicated;
步骤四、控制中心接收该通信请求数据包，根据读取端对端通信请求数据包中的每一通信节点的ID，并向该每一通信节点的发送询问数据包，所述询问数据包包括：发起节点的ID、是否同意与其端对端通信；Step 4, the control center receives the communication request packet, reads the ID of each communication node in the end-to-end communication request packet, and sends an inquiry packet to each communication node, the inquiry packet includes : The ID of the initiating node, whether it agrees to communicate with it peer-to-peer;
步骤五、每一通信节点接收该询问数据包，若其同意进行该端对端通信，则向控制中心回复应答数据包，所述应答数据包包括：自身ID、同意与发起节点ID的端对端通信、自身的坐标的经度和纬度；若某一通信节点不同意进行该端对端通信，则丢弃该询问数据包；Step 5. Each communication node receives the query data packet, and if it agrees to carry out the end-to-end communication, it replies with a response data packet to the control center, and the response data packet includes: its own ID, the end-to-end agreement with the originating node ID end-to-end communication, longitude and latitude of its own coordinates; if a communication node does not agree to carry out the end-to-end communication, then discard the query packet;
步骤六、控制中心等待一个时间周期，若在该时间周期内，未收到任何一个通信节点的应答数据包，则终止该次端对端通信；若在该时间周期内，收到至少一个通信节点的应答数据包，则读取每个应答数据包中的坐标的经度和纬度，选择信号强度排在前两位的网络备选；Step 6. The control center waits for a period of time. If within the period of time, no response packet from any communication node is received, the end-to-end communication is terminated; if at least one communication node is received within the period of time For the response data packet of the node, read the longitude and latitude of the coordinates in each response data packet, and select the network candidate with the first two digits in signal strength;
步骤七、控制中心读取端对端通信请求数据包中的坐标的经度和纬度读取步骤二中的无线网络强弱的历史数据，选择信号强度排在前两位的网络备选；Step 7, the control center reads the longitude and latitude of the coordinates in the end-to-end communication request packet, reads the historical data of the strength of the wireless network in step 2, and selects the network whose signal strength ranks in the first two places as an alternative;
步骤八、控制中心判断步骤七中的所有的备选网络的数量，选取其中强度最大的两个作为备选网络，并执行步骤九；Step 8. The control center judges the quantity of all candidate networks in step 7, selects the two with the greatest strength as candidate networks, and executes step 9;
步骤九、控制中心读取端对端通信请求数据包中的拟通信的业务类型，判断是否为实时性业务，如果判断结果为是，则执行步骤九一；如果判断结果为否，则执行步骤九二；Step 9, the control center reads the business type to be communicated in the end-to-end communication request packet, and judges whether it is a real-time business. If the judgment result is yes, then execute step 91; if the judgment result is no, then execute step Ninety two;
步骤九一、选择信号强度最高的无线网络作为终选网络，并执行步骤十；Step 91. Select the wireless network with the highest signal strength as the final selection network, and execute step 10;
步骤九二、选择信号强度第二高的无线网络作为终选网络，并执行步骤十；Step ninety-two, select the wireless network with the second highest signal strength as the final selection network, and execute step ten;
步骤十、控制中心根据端对端通信请求数据包中的ID和应答数据包中回复应答数据包的通信节点的ID，同时向发起节点和另一通信节点发送网络分配数据包，所述网络分配数据包包括：终选网络；Step ten, the control center sends the network distribution data packet to the initiating node and another communication node at the same time according to the ID in the end-to-end communication request data packet and the ID of the communication node replying the response data packet in the response data packet, the network distribution data packet The data package includes: the final selection network;
步骤十一、控制中心、发起节点与回复应答数据包的通信节点切换至终选网络，进行端对端通信。Step eleven, the control center, the initiating node and the communication node replying the response data packet are switched to the final selection network for end-to-end communication.
步骤十中，控制中心向发起节点和另一通信节点发送网络分配数据包中还包括：备选网络；控制中心、发起节点与回复应答数据包的通信节点改变业务类型，三方切换至备选网络中进行端对端通信。In step ten, the network allocation data packet sent by the control center to the initiating node and another communication node also includes: an alternative network; the control center, the initiating node, and the communication node replying to the response data packet change the service type, and the three parties switch to the alternative network peer-to-peer communication.
本发明中，在检修人员与外部进行端对端通信之间前，控制中心根据检修人员上报的业务的类型，结合检修人员所在小区的信号强度，选择恰当的无线网络，并与检修人员在选定的无线网络中进行通信。当端对端通信过程中业务类型发生变化时，三方或多方可以通过备选网络进行端对端通信。本发明的频谱利用率高，通信可靠性也得以大幅度提高。In the present invention, before the maintenance personnel perform end-to-end communication with the outside, the control center selects an appropriate wireless network according to the type of business reported by the maintenance personnel and in combination with the signal strength of the cell where the maintenance personnel are located, and communicates with the maintenance personnel in the selected communicate in a given wireless network. When the business type changes during the end-to-end communication, three or more parties can conduct end-to-end communication through the alternative network. The invention has high frequency spectrum utilization rate and greatly improves communication reliability.
具体实施方式Detailed ways
具体实施方式一、断电检修人员端对端通信方法，它包括以下步骤：Specific embodiments 1. An end-to-end communication method for power outage maintenance personnel, which includes the following steps:
步骤一、给每个拟参与通信的线路检修人员身上安装一个无线通信设备，并记为一个节点AP；Step 1. Install a wireless communication device on each line maintenance personnel who intends to participate in the communication, and record it as a node AP;
步骤二、在控制中心内部存入各小区的无线网络布设及各种无线网络强弱的历史数据，并按由强至弱的顺序列表；Step 2. Store the wireless network layout of each community and the historical data of the strength of various wireless networks in the control center, and list them in order from strong to weak;
步骤三、在一个通信周期内，若某节点AP拟发起端对端通信，则该节点AP向控制中心发送端对端通信请求数据包，所述端对端通信请求数据包包括：自身ID、另一通信节点的ID、当前坐标的经度和纬度、拟通信的业务类型；Step 3. In a communication cycle, if a certain node AP intends to initiate end-to-end communication, the node AP sends an end-to-end communication request packet to the control center, and the end-to-end communication request packet includes: its own ID, The ID of another communication node, the longitude and latitude of the current coordinates, and the type of business to be communicated;
步骤四、控制中心接收该通信请求数据包，根据读取端对端通信请求数据包中的另一通信节点的ID，并向该另一通信节点的发送询问数据包，所述询问数据包包括：发起节点的ID、是否同意与其端对端通信；Step 4, the control center receives the communication request packet, reads the ID of another communication node in the end-to-end communication request packet, and sends an inquiry packet to the other communication node, the inquiry packet includes : The ID of the initiating node, whether it agrees to communicate with it peer-to-peer;
步骤五、另一通信节点接收该询问数据包，若其同意进行该端对端通信，则向控制中心回复应答数据包，所述应答数据包包括：自身ID、同意与发起节点ID的端对端通信、自身的坐标的经度和纬度；若另一通信节点不同意进行该端对端通信，则丢弃该询问数据包；Step 5. Another communication node receives the query data packet, and if it agrees to carry out the end-to-end communication, it replies with a response data packet to the control center, and the response data packet includes: its own ID, the end-to-end agreement with the initiating node ID end-to-end communication, the longitude and latitude of its own coordinates; if another communication node does not agree to carry out the end-to-end communication, then discard the inquiry data packet;
步骤六、控制中心等待一个时间周期，若在该时间周期内，未收到另一通信节点的应答数据包，则终止该次端对端通信；若在该时间周期内，收到另一通信节点的应答数据包，则读取应答数据包中的坐标的经度和纬度，选择信号强度排在前两位的网络备选；Step 6. The control center waits for a time period. If it does not receive a response packet from another communication node within the time period, it terminates the end-to-end communication; if it receives another communication node within the time period For the response data packet of the node, read the longitude and latitude of the coordinates in the response data packet, and select the network option with the first two digits in signal strength;
步骤七、控制中心读取端对端通信请求数据包中的坐标的经度和纬度读取步骤二中的无线网络强弱的历史数据，选择信号强度排在前两位的网络备选；Step 7, the control center reads the longitude and latitude of the coordinates in the end-to-end communication request packet, reads the historical data of the strength of the wireless network in step 2, and selects the network whose signal strength ranks in the first two places as an alternative;
步骤八、控制中心判断步骤六和步骤七中的四个备选网络是否有重合的网络，若有，则舍弃其中之一；Step 8. The control center judges whether the four candidate networks in Step 6 and Step 7 have overlapped networks, and if so, discards one of them;
步骤九、控制中心判断步骤八中的剩余的备选网络是两个还是三个，若是三个，则舍弃信号强度最弱的一个，并将该两个作为备选网络，并执行步骤十；若是两个，则将该两个作为备选网络，并执行步骤十；Step 9, the control center judges whether the remaining candidate networks in step 8 are two or three, if there are three, discard the one with the weakest signal strength, and use these two as candidate networks, and perform step ten; If there are two, use the two as alternative networks, and perform step ten;
步骤十、控制中心读取端对端通信请求数据包中的拟通信的业务类型，判断是否为实时性业务，如果判断结果为是，则执行步骤十零一；如果判断结果为否，则执行步骤十零二；Step 10. The control center reads the business type to be communicated in the end-to-end communication request packet, and judges whether it is a real-time business. If the judgment result is yes, then execute step 101; if the judgment result is no, then execute Step ten and two;
步骤十零一、选择信号强度最高的无线网络作为终选网络，并执行步骤十一；Step 101, select the wireless network with the highest signal strength as the final selection network, and execute step 11;
步骤十零二、选择信号强度第二高的无线网络作为终选网络，并执行步骤十一；Step 102, select the wireless network with the second highest signal strength as the final network, and execute step 11;
步骤十一、控制中心根据端对端通信请求数据包中的ID和应答数据包中另一通信节点的ID，同时向发起节点和另一通信节点发送网络分配数据包，所述网络分配数据包包括：终选网络；Step 11, the control center sends a network distribution data packet to the initiating node and another communication node at the same time according to the ID in the end-to-end communication request data packet and the ID of another communication node in the response data packet, and the network distribution data packet Including: final selection network;
步骤十二、控制中心、发起节点与另一通信节点切换至终选网络，进行端对端通信。Step 12: The control center, the initiating node and another communication node switch to the final network for end-to-end communication.
本发明中，在检修人员与外部进行端对端通信之间前，控制中心根据检修人员上报的业务的类型，结合检修人员所在小区的信号强度，选择恰当的无线网络，并与检修人员在选定的无线网络中进行通信。当端对端通信过程中业务类型发生变化时，三方可以通过备选网络进行端对端通信。本发明的频谱利用率高，通信可靠性也得以大幅度提高。In the present invention, before the maintenance personnel perform end-to-end communication with the outside, the control center selects an appropriate wireless network according to the type of business reported by the maintenance personnel and in combination with the signal strength of the cell where the maintenance personnel are located, and communicates with the maintenance personnel in the selected communicate in a given wireless network. When the service type changes during the end-to-end communication, the three parties can communicate end-to-end through the alternative network. The invention has high frequency spectrum utilization rate and greatly improves communication reliability.
具体实施方式二、本具体实施方式是具体实施方式一的进一步限定，步骤十一中，控制中心向发起节点和另一通信节点发送网络分配数据包中还包括：备选网络；控制中心、发起节点与另一通信节点改变业务类型，三方切换至备选网络中进行端对端通信。Embodiment 2. This embodiment is a further limitation of Embodiment 1. In step 11, the network allocation data packet sent by the control center to the initiating node and another communication node also includes: an alternative network; the control center, the initiating The node changes the business type with another communication node, and the three parties switch to the alternative network for end-to-end communication.
具体实施方式三、断电检修人员端对端通信方法，它包括以下步骤：Specific implementation mode three, the end-to-end communication method for power-off maintenance personnel, which includes the following steps:
步骤一、给每个拟参与通信的线路检修人员身上安装一个无线通信设备，并记为一个节点AP；Step 1. Install a wireless communication device on each line maintenance personnel who intends to participate in the communication, and record it as a node AP;
步骤二、在控制中心内部存入各小区的无线网络布设及各种无线网络强弱的历史数据，并按由强至弱的顺序列表；Step 2. Store the wireless network layout of each community and the historical data of the strength of various wireless networks in the control center, and list them in order from strong to weak;
步骤三、在一个通信周期内，若某节点AP拟发起端对端通信，则该节点AP向控制中心发送端对端通信请求数据包，所述端对端通信请求数据包包括：自身ID、每一通信节点的ID、当前坐标的经度和纬度、拟通信的业务类型；Step 3. In a communication cycle, if a certain node AP intends to initiate end-to-end communication, the node AP sends an end-to-end communication request packet to the control center, and the end-to-end communication request packet includes: its own ID, The ID of each communication node, the longitude and latitude of the current coordinates, and the type of business to be communicated;
步骤四、控制中心接收该通信请求数据包，根据读取端对端通信请求数据包中的每一通信节点的ID，并向该每一通信节点的发送询问数据包，所述询问数据包包括：发起节点的ID、是否同意与其端对端通信；Step 4, the control center receives the communication request packet, reads the ID of each communication node in the end-to-end communication request packet, and sends an inquiry packet to each communication node, the inquiry packet includes : The ID of the initiating node, whether it agrees to communicate with it peer-to-peer;
步骤五、每一通信节点接收该询问数据包，若其同意进行该端对端通信，则向控制中心回复应答数据包，所述应答数据包包括：自身ID、同意与发起节点ID的端对端通信、自身的坐标的经度和纬度；若某一通信节点不同意进行该端对端通信，则丢弃该询问数据包；Step 5. Each communication node receives the query data packet, and if it agrees to carry out the end-to-end communication, it replies with a response data packet to the control center, and the response data packet includes: its own ID, the end-to-end agreement with the originating node ID end-to-end communication, longitude and latitude of its own coordinates; if a communication node does not agree to carry out the end-to-end communication, then discard the query packet;
步骤六、控制中心等待一个时间周期，若在该时间周期内，未收到任何一个通信节点的应答数据包，则终止该次端对端通信；若在该时间周期内，收到至少一个通信节点的应答数据包，则读取每个应答数据包中的坐标的经度和纬度，选择信号强度排在前两位的网络备选；Step 6. The control center waits for a period of time. If within the period of time, no response packet from any communication node is received, the end-to-end communication is terminated; if at least one communication node is received within the period of time For the response data packet of the node, read the longitude and latitude of the coordinates in each response data packet, and select the network candidate with the first two digits in signal strength;
步骤七、控制中心读取端对端通信请求数据包中的坐标的经度和纬度读取步骤二中的无线网络强弱的历史数据，选择信号强度排在前两位的网络备选；Step 7, the control center reads the longitude and latitude of the coordinates in the end-to-end communication request packet, reads the historical data of the strength of the wireless network in step 2, and selects the network whose signal strength ranks in the first two places as an alternative;
步骤八、控制中心判断步骤七中的所有的备选网络的数量，选取其中强度最大的两个作为备选网络，并执行步骤九；Step 8. The control center judges the quantity of all candidate networks in step 7, selects the two with the greatest strength as candidate networks, and executes step 9;
步骤九、控制中心读取端对端通信请求数据包中的拟通信的业务类型，判断是否为实时性业务，如果判断结果为是，则执行步骤九一；如果判断结果为否，则执行步骤九二；Step 9, the control center reads the business type to be communicated in the end-to-end communication request packet, and judges whether it is a real-time business. If the judgment result is yes, then execute step 91; if the judgment result is no, then execute step Ninety two;
步骤九一、选择信号强度最高的无线网络作为终选网络，并执行步骤十；Step 91. Select the wireless network with the highest signal strength as the final selection network, and execute step 10;
步骤九二、选择信号强度第二高的无线网络作为终选网络，并执行步骤十；Step ninety-two, select the wireless network with the second highest signal strength as the final selection network, and execute step ten;
步骤十、控制中心根据端对端通信请求数据包中的ID和回复应答数据包的通信节点的ID，同时向发起节点和另一通信节点发送网络分配数据包，所述网络分配数据包包括：终选网络；Step ten, the control center sends the network distribution data packet to the initiating node and another communication node simultaneously according to the ID in the end-to-end communication request data packet and the communication node ID of the reply response data packet, and the network distribution data packet includes: final selection network;
步骤十一、控制中心、发起节点与回复应答数据包的通信节点切换至终选网络，进行端对端通信。Step eleven, the control center, the initiating node and the communication node replying the response data packet are switched to the final selection network for end-to-end communication.
具体实施方式四、本具体实施方式是具体实施方式三的进一步限定，步骤十中，控制中心向发起节点和回复应答数据包的通信节点发送网络分配数据包中还包括：备选网络；控制中心、发起节点与回复应答数据包的通信节点改变业务类型，三方切换至备选网络中进行端对端通信。Embodiment 4. This embodiment is a further limitation of Embodiment 3. In step 10, the control center sends the network allocation data packet to the initiating node and the communication node that replies the response data packet and also includes: an alternative network; the control center 1. The initiating node and the communication node replying the response data packet change the service type, and the three parties switch to the alternative network for end-to-end communication.
本发明中，在检修人员与外部进行端对端通信之间前，控制中心根据检修人员上报的业务的类型，结合检修人员所在小区的信号强度，选择恰当的无线网络，并与检修人员在选定的无线网络中进行通信。当端对端通信过程中业务类型发生变化时，通信多方可以通过备选网络进行端对端通信。本发明的频谱利用率高，通信可靠性也得以大幅度提高。In the present invention, before the maintenance personnel perform end-to-end communication with the outside, the control center selects an appropriate wireless network according to the type of business reported by the maintenance personnel and in combination with the signal strength of the cell where the maintenance personnel are located, and communicates with the maintenance personnel in the selected communicate in a given wireless network. When the service type changes during the end-to-end communication process, multiple communication parties can conduct end-to-end communication through the alternative network. The invention has high frequency spectrum utilization rate and greatly improves communication reliability.
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