WO2020211198A1 - 一种Mesh组网AP控制客户端接入的方法及系统 - Google Patents

一种Mesh组网AP控制客户端接入的方法及系统 Download PDF

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WO2020211198A1
WO2020211198A1 PCT/CN2019/094127 CN2019094127W WO2020211198A1 WO 2020211198 A1 WO2020211198 A1 WO 2020211198A1 CN 2019094127 W CN2019094127 W CN 2019094127W WO 2020211198 A1 WO2020211198 A1 WO 2020211198A1
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node
client
rate
information
bandwidth rate
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PCT/CN2019/094127
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English (en)
French (fr)
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邵存金
陈金花
王戈
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烽火通信科技股份有限公司
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Publication of WO2020211198A1 publication Critical patent/WO2020211198A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0289—Congestion control

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  • the invention relates to the technical field of wireless networks, in particular to a method and system for a Mesh networking AP to control client access.
  • Traditional wireless network access technologies mainly adopt point-to-point or point-to-multipoint topological structures.
  • a central node in this type of topological structure, such as base stations in mobile communication systems and 802.11 wireless local area networks (WLAN). Access point (AP) and so on.
  • the central node is connected to each wireless terminal through a single-hop wireless link.
  • the central node controls the access of each wireless terminal to the wireless network.
  • it is connected to the wired backbone network through a wired link to provide a connection to the backbone network.
  • the wireless Mesh network is a completely different network from the traditional wireless network.
  • each network node is connected in a wireless multi-hop manner through neighboring other network nodes.
  • Mesh network has many advantages, such as more stability, wider coverage area, automatic networking, etc., and adding MU-MIMO technology (Multi-User Multiple-Input Multiple-Output, multi-user multiple After the in-multiple-out technology), it can easily cope with complex, multi-device access and high-efficiency transmission environments.
  • the client selects the node AP with strong signal strength according to the RSSI (Received Signal Strength Indication) scanned to the Mesh node AP, but if multiple clients connect Entering under the same node AP with strong signal strength will cause congestion of the node AP and affect user experience.
  • RSSI Receiveived Signal Strength Indication
  • the purpose of the present invention is to provide a method and system for a Mesh networking AP to control client access, which can judge the network status of the node AP before accessing, and avoid multiple client accesses. Into the same node AP with better network, causing node AP blockage.
  • the technical solution adopted by a method for a Mesh networking AP to control client access in the present invention is:
  • the node AP of the Mesh network receives the probe request frame sent by the client, and the probe request frame includes the RSSI information and MIMO information of the client;
  • the node AP queries the rate table based on the RSSI information and MIMO information of the client, and the current working frequency band and bandwidth information of the node AP, and obtains the bandwidth rate estimated by the node AP to the client;
  • Each node AP calculates the actual bandwidth rate that the node AP can allocate to the client based on the bandwidth rate estimated to the client and its own channel utilization rate;
  • Each node AP reports the calculated actual bandwidth rate to the Mesh network control node, and the Mesh network control node connects the client to the optimal node AP based on the actual bandwidth rate.
  • the rate table is based on the client's RSSI information and MIMO information, as well as the current working frequency band and bandwidth information of the node AP. It is used to record the bandwidth rate that the node AP can provide to the client in an ideal state. , And the rate table is maintained by the node AP.
  • Pre_Allow_Through_Put is the actual bandwidth rate that the node AP can allocate to the client
  • Pre_Through_Put is the bandwidth rate estimated by the node AP to the client
  • channel_utilization is the channel utilization rate of the node AP itself.
  • the Mesh network control node connects the client to the optimal node AP based on the actual bandwidth rate.
  • the specific steps are as follows:
  • the Mesh network control node selects all the node APs corresponding to the largest actual bandwidth rate in the reported actual bandwidth rate, and connects the client to the node AP.
  • the node AP based on the client's RSSI information and MIMO information, as well as the current working frequency band and bandwidth information of the node AP, before querying the rate table, it also includes: the node AP of the Mesh network receives the probe request broadcast by the client Frame, based on the RSSI information in the probe request frame, determine whether the RSSI value of the client is greater than the set threshold. If so, the node AP of the Mesh network is based on the RSSI information and MIMO information of the client, and the current working frequency band and bandwidth information of the node AP. Query the rate table, if not, end.
  • the present invention also provides a system for Mesh networking AP to control client access, including:
  • At least one node AP includes:
  • the -Query module which is used to query the rate table based on the RSSI information and MIMO information of the client in the probe request frame, as well as the current working frequency band and bandwidth information of the node AP, to obtain the bandwidth rate estimated by the node AP to the client;
  • -Access control module which is used to receive notifications from the arbitration module in the Mesh network control node and allow the corresponding client to access;
  • the Mesh network control node includes:
  • -Arbitration module which is used to receive the actual bandwidth rate uploaded by the communication module in the node AP, and based on the actual bandwidth rate, select the optimal node AP for the client to access, and notify the optimal node AP to allow the client to access.
  • the rate table is based on the client's RSSI information and MIMO information, as well as the working frequency band and bandwidth information of the node AP. It is used to record the bandwidth rate that the node AP can provide to the client in an ideal state. , And the rate table is maintained by the node AP.
  • the calculation module calculates the actual bandwidth rate that the node AP can allocate to the client.
  • the calculation formula is:
  • Pre_Allow_Through_Put is the actual bandwidth rate that the node AP can allocate to the client
  • Pre_Through_Put is the bandwidth rate estimated by the node AP to the client
  • channel_utilization is the channel utilization rate of the node AP itself.
  • the arbitration module receives the actual bandwidth rate uploaded by the communication module in the node AP, and selects the optimal node AP for the client to access based on the actual bandwidth rate.
  • the specific process is:
  • the arbitration module selects all the node APs corresponding to the largest actual bandwidth rate in the reported actual bandwidth rate, and the node AP is the optimal node AP.
  • the receiving module is further configured to determine whether the RSSI value of the client is greater than the set threshold based on the RSSI information in the received probe request frame, and if so, drive the query module based on the client's information in the probe request frame RSSI information and MIMO information, as well as the current working frequency band and bandwidth information of the node AP, query the rate table, if not, end.
  • the present invention has the advantages that: before the client accesses the node AP, the node AP according to the client's RSSI information and MIMO (Multiple-Input Multiple-Output) information, and the node AP
  • the current working frequency band and bandwidth information obtain the bandwidth rate estimated by the node AP to the client, and calculate the bandwidth rate that the node AP can actually provide to the client according to the current channel utilization of the node AP.
  • the Mesh network control node according to all The bandwidth rate that the node AP can actually provide to the client, connect the client to the node AP of the optimal network, and judge the network status of the node AP before accessing, avoiding multiple clients from accessing the same network. Under the node AP, cause the occurrence of node AP congestion.
  • Figure 1 is a flowchart of a method for a Mesh networking AP to control client access in an embodiment of the present invention
  • Figure 2 is a schematic structural diagram of a system for a Mesh networking AP to control client access in an embodiment of the present invention.
  • the embodiment of the present invention provides a method for a Mesh networking AP to control client access.
  • the node Before the client accesses the node AP, the node is obtained according to the RSSI information and MIMO information of the client, and the current working frequency band and bandwidth information of the node AP
  • the AP estimates the bandwidth rate for the client, and calculates the bandwidth rate that the node AP can actually provide to the client, so as to connect the client to the node AP of the optimal network.
  • the embodiment of the present invention also provides a corresponding Mesh networking AP controls the system that the client accesses.
  • an embodiment of the present invention provides a method for a Mesh networking AP to control client access, which includes the following steps:
  • the node AP of the Mesh network receives the probe request frame sent by the client.
  • the probe request frame includes the client's RSSI information and MIMO information.
  • the client first broadcasts a detection request frame to the Mesh network, and the node AP of the Mesh network receives the detection request frame sent by the client. This event occurs before the client accesses the node AP and exchanges service data.
  • the Mesh network includes multiple node APs, and all the node APs will receive the detection request frame broadcast by the client.
  • the RSSI information contains the RSSI value of the client.
  • the client in the embodiment of the present invention is a wireless device that accesses the Mesh network. When the client broadcasts the detection request frame to the Mesh network, each detection request frame is encapsulated with the client's RSSI information and MIMO information.
  • the node AP of the Mesh network queries the rate table to obtain the bandwidth rate estimated by the node AP to the client based on the RSSI information and MIMO information of the client, as well as the AP's current working frequency band and bandwidth information.
  • the rate table is based on the client's RSSI information and MIMO information, as well as the current working frequency band and bandwidth information of the node AP. It is used to record the bandwidth rate that the node AP can provide to the client in an ideal state, and the rate table Maintained by the node AP.
  • the ideal state means that there is no interference from other equipment, and the channel utilization rate of the node AP is 100%, and the bandwidth rate that the node AP can provide to the client. Therefore, according to the RSSI information and MIMO information of the client, and the current working frequency band and bandwidth information of the node AP, By looking up the table, the bandwidth rate estimated by the node AP to the client can be obtained.
  • the bandwidth rate estimated by each node AP to the client is recorded in the rate table with the client as a unit, that is, the bandwidth rate that the node AP can provide to the client in an ideal state. Subsequently, when the node AP receives the probe request frame, it can quickly learn the bandwidth rate estimated by the node AP itself to the client according to the RSSI information and MIMO information in the probe request frame.
  • the bandwidth rate that the node AP can provide to the client recorded in the rate table is only the RSSI information, and other conditions are fixed values.
  • the RSSI information of the client is checked, and the bandwidth rate that the node AP can provide to the client can be obtained.
  • the bandwidth rate table provided to the client is shown in Table 1:
  • Throughput represents the bandwidth rate. It can be seen that when other conditions that affect the bandwidth rate are fixed values, the measured bandwidth rate changes as the RSSI changes.
  • Each node AP calculates the actual bandwidth rate that the node AP can allocate to the client based on the estimated bandwidth rate for the client and its own channel utilization. That is, the node AP calculates the actual bandwidth rate that can be provided to the client according to the current actual channel utilization rate.
  • Each node AP reports the calculated actual bandwidth rate to the Mesh network control node, and the Mesh network control node connects the client to the optimal node AP based on the actual bandwidth rate.
  • the Mesh network control node connects the client to the optimal node AP based on the actual bandwidth rate.
  • the specific steps are: The Mesh network control node selects all the reported actual bandwidth rate medians and the node corresponding to the largest actual bandwidth rate, and connects the client to the AP. Node AP.
  • the node AP obtains the node AP estimation according to the client's RSSI information and MIMO and AP current working frequency band and bandwidth information The bandwidth rate for the client, and calculate the bandwidth rate that the node AP can actually provide to the client based on the current channel utilization rate of the node AP.
  • the Mesh network control node calculates the bandwidth rate that all the node APs can actually provide to the client.
  • the network status of the node AP is judged before the access, so as to avoid multiple clients accessing the same node AP with better network, causing the node AP to be blocked. It overcomes the problem that the mesh network may be congested after being connected to the Mesh network by simply using RSSI information in the prior art.
  • the node AP can be allocated to The actual bandwidth rate of the client, the calculation formula is:
  • Pre_Allow_Through_Put is the actual bandwidth rate that the node AP can allocate to the client
  • Pre_Through_Put is the bandwidth rate estimated by the node AP to the client
  • channel_utilization is the channel utilization rate of the node AP itself.
  • the implementation of the present invention provides a method for Mesh networking AP to control client access.
  • the node AP based on the RSSI information and MIMO information of the client, and the current working frequency band and bandwidth information of the node AP, before querying the rate table, it also includes: the node AP of the Mesh network receives the detection broadcast by the client Request frame, based on the RSSI information in the probe request frame, determine whether the RSSI value of the client is greater than the set threshold, if so, the node AP of the Mesh network is based on the RSSI information and MIMO information of the client, and the current working frequency band and bandwidth information of the node AP , Query the rate table, if not, end.
  • a system for Mesh networking AP to control client access includes a Mesh network control node and at least one node AP.
  • the node AP includes a receiving module, a query module, a calculation module, a communication module, and an access control module.
  • the receiving module is used to receive the probe request frame sent by the client;
  • the query module is used to query the rate table based on the client's RSSI information and MIMO information in the probe request frame and the current working frequency band and bandwidth information of the node AP to obtain the node AP Estimate the bandwidth rate to the client;
  • the calculation module is used to calculate the actual bandwidth rate that the node AP can allocate to the client according to the obtained node AP’s estimated bandwidth rate to the client and the node AP’s own channel utilization;
  • the communication module is used The actual bandwidth rate calculated by the calculation module is reported to the Mesh network control node;
  • the access control module is used to receive the notification from the arbitration module in the Mesh network control node and allow the corresponding client to access.
  • the Mesh network control node includes an arbitration module.
  • the arbitration module is used to receive the actual bandwidth rate uploaded by the communication module in the node AP, and based on the actual bandwidth rate, select the optimal node AP for the client to access, and notify the optimal node AP to allow the client to access .
  • the rate table is based on the client's RSSI information and MIMO information, as well as the current working frequency band and bandwidth information of the node AP. It is used to record the bandwidth rate that the node AP can provide to the client in an ideal state, and the rate table is maintained by the node AP.
  • the ideal state means that there is no interference from other equipment, and the channel utilization rate of the node AP is 100%, and the bandwidth rate that the node AP can provide to the client.
  • the rate table the bandwidth rate estimated by each node AP to the client is recorded in the rate table with the client as a unit, that is, the bandwidth rate that the node AP can provide to the client in an ideal state. Subsequently, when the node AP receives the probe request frame, it can quickly learn the bandwidth rate estimated by the node AP itself to the client according to the RSSI information and MIMO information in the probe request frame.
  • the arbitration module receives the actual bandwidth rate uploaded by the communication module in the node AP, and selects the optimal node AP for the client to access based on the actual bandwidth rate.
  • the specific process is:
  • the arbitration module selects all the node APs corresponding to the maximum actual bandwidth rate in the reported actual bandwidth rate, and this node AP is regarded as the optimal node AP.
  • the Mesh networking AP in the embodiment of the present invention controls the client access system.
  • the node AP obtains the node according to the RSSI information and MIMO information of the client, and the current working frequency band and bandwidth information of the node AP
  • the AP estimates the bandwidth rate for the client, and calculates the bandwidth rate that the node AP can actually provide to the client based on the current channel utilization of the node AP.
  • the Mesh network control node calculates the bandwidth rate that all the node APs can actually provide to the client , Connect the client to the node AP of the optimal network, and judge the network status of the node AP before accessing, so as to avoid multiple clients accessing to the same node AP with better network, causing node AP blockage Appear.
  • the implementation of the present invention provides the first option of a system for Mesh networking AP to control client access.
  • the calculation module calculates the actual bandwidth rate that the node AP itself can allocate to the client, and the calculation formula is:
  • Pre_Allow_Through_Put is the actual bandwidth rate that the node AP can allocate to the client
  • Pre_Through_Put is the bandwidth rate estimated by the node AP to the client
  • channel_utilization is the channel utilization rate of the node AP itself.
  • the implementation of the present invention provides a system for Mesh networking AP to control client access.
  • the receiving module is further configured to determine whether the RSSI value of the client is greater than the set threshold based on the RSSI information in the received probe request frame, and if so, drive the query module based on the RSSI of the client in the probe request frame Information and MIMO information, as well as the current working frequency band and bandwidth information of the node AP, query the rate table, if not, end.

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Abstract

本发明公开了一种Mesh组网AP控制客户端接入的方法及系统，涉及无线网络技术领域，该方法包括：Mesh网络的节点AP接收客户端发出的探测请求帧；节点AP基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，获得节点AP预估给客户端的带宽速率；各节点AP根据预估给客户端的带宽速率，以及自身的信道利用率，计算出节点AP能够分配给客户端的实际带宽速率；各节点AP将计算出的实际带宽速率上报至Mesh网络控制节点，Mesh网络控制节点基于实际带宽速率将客户端接入最优节点AP。本发明在接入之前对节点AP的网络状态进行判断，避免多个客户端接入在同一个网络较优的节点AP下，造成节点AP堵塞现象的出现。

Description

一种Mesh组网AP控制客户端接入的方法及系统 技术领域
本发明涉及无线网络技术领域，具体涉及一种Mesh组网AP控制客户端接入的方法及系统。
背景技术
传统的无线网络接入技术中，主要采用点到点或者点到多点的拓扑结构，该类拓扑结构中一般都存在一个中心节点，例如移动通信系统中的基站、802.11无线局域网(WLAN)中的接入点(AP)等等。中心节点与各个无线终端通过单跳无线链路相连，中心节点控制各无线终端对无线网络的访问，同时，其又通过有线链路与有线骨干网相连，提供到骨干网的连接。
无线Mesh网络是一种与传统的无线网络完全不同的网络，在Mesh网络结构中，各网络节点通过相邻其他网络节点，以无线多跳方式相连。与传统的组网相比，Mesh网络拥有多项优势，如更稳定、覆盖面积更广、自动组网等等，再加入MU-MIMO技术(Multi-User Multiple-Input Multiple-Output，多用户多入多出技术)之后，更是让它能够轻松应付复杂、多设备接入，且还能够高效率传输的使用环境。
在无线Mesh网络的接入方式上，客户端根据扫描到Mesh节点AP的RSSI(Received Signal Strength Indication，接收的信号强度指示)来选择接入信号强度大的节点AP，但如果多个客户端接入在同一个信号强度较强的节点AP下，就会造成该节点AP的拥塞，影响用户体验。
发明内容
针对现有技术中存在的缺陷，本发明的目的在于提供一种Mesh组网AP控制客户端接入的方法及系统，在接入之前对节点AP的网络状态进行判断，避免多个客户端接入在同一个网络较优的节点AP下，造成节点AP堵塞现象的出现。
为达到以上目的，本发明一种Mesh组网AP控制客户端接入的方法采取的技术方案是：
Mesh网络的节点AP接收客户端发出的探测请求帧，所述探测请求帧中包括客户端的RSSI信息和MIMO信息；
节点AP基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，获得节点AP预估给客户端的带宽速率；
各节点AP根据预估给客户端的带宽速率，以及自身的信道利用率，计算出节点AP能够分配给客户端的实际带宽速率；
各节点AP将计算出的实际带宽速率上报至Mesh网络控制节点，Mesh网络控制节点基于实际带宽速率将客户端接入最优节点AP。
在上述技术方案的基础上，所述速率表基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息测试得出，用于记录理想状态下节点AP能提供给客户端的带宽速率，且速率表由节点AP维护。
在上述技术方案的基础上，所述计算出节点AP能够分配给客户端的实际带宽速率，计算公式为：
Pre_Allow_Through_Put＝Pre_Through_Put*(1-channel_utilization)
其中，Pre_Allow_Through_Put为节点AP能够分配给客户端的实际带宽速率，Pre_Through_Put为节点AP预估给客户端的带宽速率， channel_utilization为节点AP自身的信道利用率。
在上述技术方案的基础上，所述Mesh网络控制节点基于实际带宽速率将客户端接入最优节点AP，具体步骤为：
Mesh网络控制节点选取所有上报的实际带宽速率中值最大实际带宽速率对应的节点AP，将客户端接入该节点AP中。
在上述技术方案的基础上，节点AP基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表之前，还包括：Mesh网络的节点AP接收客户端广播的探测请求帧，基于探测请求帧中的RSSI信息，判断客户端的RSSI值是否大于设定阈值，若是，则Mesh网络的节点AP基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，若否，则结束。
本发明还提供一种Mesh组网AP控制客户端接入的系统，包括：
至少一节点AP，所述节点AP包括，
-接收模块，其用于用于接收客户端发出的探测请求帧；
-查询模块，其用于基于探测请求帧中客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，获得节点AP预估给客户端的带宽速率；
-计算模块，其用于根据获得的节点AP预估给客户端的带宽速率和节点AP自身的信道利用率，计算节点AP自身能够分配给客户端的实际带宽速率；
-通信模块，其用于将计算模块计算出的实际带宽速率上报至Mesh网络控制节点；
-接入控制模块，其用于接收Mesh网络控制节点中仲裁模块的通知，允许对应客户端接入；
Mesh网络控制节点，所述Mesh网络控制节点包括，
-仲裁模块，其用于接收节点AP中通信模块上传的实际带宽速率，并基于实际带宽速率为客户端选择接入最优节点AP，通知最优节点AP允许客户端接入。
在上述技术方案的基础上，所述速率表基于客户端的RSSI信息和MIMO信息，以及节点AP的工作频段和频宽信息测试得出，用于记录理想状态下节点AP能提供给客户端的带宽速率，且速率表由节点AP维护。
在上述技术方案的基础上，所述计算模块计算节点AP自身能够分配给客户端的实际带宽速率，计算公式为：
Pre_Allow_Through_Put＝Pre_Through_Put*(1-channel_utilization)
其中，Pre_Allow_Through_Put为节点AP能够分配给客户端的实际带宽速率，Pre_Through_Put为节点AP预估给客户端的带宽速率，channel_utilization为节点AP自身的信道利用率。
在上述技术方案的基础上，所述仲裁模块接收节点AP中通信模块上传的实际带宽速率，并基于实际带宽速率为客户端选择接入最优节点AP，具体过程为：
仲裁模块选取所有上报的实际带宽速率中值最大实际带宽速率对应的节点AP，该节点AP作为最优节点AP。
在上述技术方案的基础上，所述接收模块还用于基于所接收探测请求帧中的RSSI信息，判断客户端的RSSI值是否大于设定阈值，若是，则驱使查询模块基于探测请求帧中客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，若否，则结束。
与现有技术相比，本发明的优点在于：在客户端接入节点AP之 前，节点AP根据客户端的RSSI信息和MIMO(Multiple-Input Multiple-Output，多入多出技术)信息，以及节点AP当前工作频段和频宽信息，获取节点AP预估给该客户端的带宽速率，并根据节点AP当前自身的信道利用率计算出节点AP实际能够提供给该客户端的带宽速率，Mesh网络控制节点根据所有节点AP实际能够提供给客户端的带宽速率，将客户端接入最优网络的节点AP上，在接入之前对节点AP的网络状态进行判断，避免多个客户端接入在同一个网络较优的节点AP下，造成节点AP堵塞现象的出现。
附图说明
图1为本发明实施例中一种Mesh组网AP控制客户端接入的方法的流程图；
图2为本发明实施例中一种Mesh组网AP控制客户端接入的系统的结构示意图。
具体实施方式
本发明实施例提供一种Mesh组网AP控制客户端接入的方法，在客户端接入节点AP之前，根据客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，获取节点AP预估给该客户端的带宽速率，并计算出节点AP实际能够提供给该客户端的带宽速率，从而将客户端接入最优网络的节点AP上，本发明实施例还相应的提供了一种Mesh组网AP控制客户端接入的系统。以下结合附图及实施例对本发明作进一步详细说明。
参见图1所示，本发明实施例提供一种Mesh组网AP控制客户端接入的方法，包括以下步骤：
S1：Mesh网络的节点AP接收客户端发出的探测请求帧，探测 请求帧中包括客户端的RSSI信息和MIMO信息。
本发明实施例中，客户端首先向Mesh网络广播探测请求帧，Mesh网络的节点AP接收客户端发出的探测请求帧，该事件发生在客户端接入节点AP，进行业务数据交互之前。Mesh网络中包括多个节点AP，所有节点AP均会收到客户端广播的探测请求帧。RSSI信息中含有客户端的RSSI值。本发明实施例中的客户端为接入Mesh网络的无线设备。客户端向Mesh网络广播探测请求帧时，每个探测请求帧均封装有客户端的RSSI信息和MIMO信息。
S2：Mesh网络的节点AP基于客户端的RSSI信息和MIMO信息，以及AP当前工作频段和频宽信息，查询速率表，获得节点AP预估给客户端的带宽速率。
本发明实施例中，速率表基于客户端的RSSI信息和MIMO信息，及节点AP当前工作频段和频宽信息测试得出，用于记录理想状态下节点AP能提供给客户端的带宽速率，且速率表由节点AP维护。理想状态指无其它设备干扰，且节点AP的信道利用率为100％，节点AP能够提供给客户端的带宽速率，因此根据客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，进行查表，即可获得节点AP预估给客户端的带宽速率。
通过前期的运行测试，在速率表中，以客户端为单位，记录每个节点AP预估给客户端的带宽速率，即在理想状态下，节点AP能够提供给客户端的带宽速率。后续当节点AP接收到探测请求帧时，即可根据探测请求帧中的RSSI信息和MIMO信息，快速获知节点AP自身预估给客户端的带宽速率。
进一步的，为简化查表操作，在另一种实施方式中，速率表中记录的节点AP能够提供给客户端的带宽速率仅与RSSI信息，其它条 件为定值，进行速率表查表时，根据客户端的RSSI信息进行查表，即可得到节点AP能提供给客户端的带宽速率。例如对于某节点AP，在5G工作频段、80MHz频宽、MIMO 2x2条件下，其对应的向客户端提供的带宽速率表参见表1所示：
表1
Figure PCTCN2019094127-appb-000001
其中，Throughput表示带宽速率，可见，在影响带宽速率的其它条件为定值时，随着RSSI的变化，测得的带宽速率随之发生改变。
因为同一款节点AP采用的芯片，硬件材料相同，同一款节点AP的上述经验数据基本上是一致的。该表是在节点AP出厂前固化在节点AP中的，后期也可以升级微调，在此不再赘述。
S3：各节点AP根据预估给客户端的带宽速率，以及自身的信道利用率，计算出节点AP能够分配给客户端的实际带宽速率。即节点AP根据当前自身的实际信道利用率，算出当前能够提供给客户端的实际带宽速率。
S4：各节点AP将计算出的实际带宽速率上报至Mesh网络控制节点，Mesh网络控制节点基于实际带宽速率将客户端接入最优节点AP。
Mesh网络控制节点基于实际带宽速率将客户端接入最优节点AP，具体步骤为：Mesh网络控制节点选取所有上报的实际带宽速率中值最大实际带宽速率对应的节点AP，将客户端接入该节点AP中。
本发明实施例的Mesh组网AP控制客户端接入的方法，在客户端接入节点AP之前，节点AP根据客户端的RSSI信息及MIMO及 AP当前工作频段和频宽信息，获取节点AP预估给该客户端的带宽速率，并根据节点AP当前自身的信道利用率计算出节点AP实际能够提供给该客户端的带宽速率，Mesh网络控制节点根据所有节点AP实际能够提供给客户端的带宽速率，将客户端接入最优网络的节点AP上，在接入之前对节点AP的网络状态进行判断，避免多个客户端接入在同一个网络较优的节点AP下，造成节点AP堵塞现象的出现，克服了现有技术中单纯以RSSI信息判断，接入Mesh网络后可能导致Mesh网络拥塞的问题。
可选地，在上述图1对应实施例的基础上，本发明实施提供的一种Mesh组网AP控制客户端接入的方法的第一个可选实施例中，计算出节点AP能够分配给客户端的实际带宽速率，计算公式为：
Pre_Allow_Through_Put＝Pre_Through_Put*(1-channel_utilization)
其中，Pre_Allow_Through_Put为节点AP能够分配给客户端的实际带宽速率，Pre_Through_Put为节点AP预估给客户端的带宽速率，channel_utilization为节点AP自身的信道利用率。
可选地，在上述一种Mesh组网AP控制客户端接入的方法的第一个可选实施例的基础上，本发明实施提供的一种Mesh组网AP控制客户端接入的方法的第二个可选实施例中，节点AP基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表之前，还包括：Mesh网络的节点AP接收客户端广播的探测请求帧，基于探测请求帧中的RSSI信息，判断客户端的RSSI值是否大于设定阈值，若是，则Mesh网络的节点AP基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，若否，则结束。
参见图2所示，本发明实施例提供的一种Mesh组网AP控制客 户端接入的系统，包括Mesh网络控制节点和至少一节点AP。
节点AP包括接收模块、查询模块、计算模块、通信模块和接入控制模块。接收模块用于用于接收客户端发出的探测请求帧；查询模块用于基于探测请求帧中客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，获得节点AP预估给客户端的带宽速率；计算模块用于根据获得的节点AP预估给客户端的带宽速率和节点AP自身的信道利用率，计算节点AP自身能够分配给客户端的实际带宽速率；通信模块用于将计算模块计算出的实际带宽速率上报至Mesh网络控制节点；接入控制模块用于接收Mesh网络控制节点中仲裁模块的通知，允许对应客户端接入。Mesh网络控制节点包括仲裁模块，仲裁模块用于接收节点AP中通信模块上传的实际带宽速率，并基于实际带宽速率为客户端选择接入最优节点AP，通知最优节点AP允许客户端接入。
速率表基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息测试得出，用于记录理想状态下节点AP能提供给客户端的带宽速率，且速率表由节点AP维护。理想状态指无其它设备干扰，且节点AP的信道利用率为100％，节点AP能够提供给客户端的带宽速率。通过前期的运行测试，在速率表中，以客户端为单位，记录每个节点AP预估给客户端的带宽速率，即在理想状态下，节点AP能够提供给客户端的带宽速率。后续当节点AP接收到探测请求帧时，即可根据探测请求帧中的RSSI信息和MIMO信息，快速获知节点AP自身预估给客户端的带宽速率。
仲裁模块接收节点AP中通信模块上传的实际带宽速率，并基于实际带宽速率为客户端选择接入最优节点AP，具体过程为：
仲裁模块选取所有上报的实际带宽速率中值最大实际带宽速率 对应的节点AP，该节点AP作为最优节点AP。
本发明实施例的Mesh组网AP控制客户端接入的系统，在客户端接入节点AP之前，节点AP根据客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，获取节点AP预估给该客户端的带宽速率，并根据节点AP当前自身的信道利用率计算出节点AP实际能够提供给该客户端的带宽速率，Mesh网络控制节点根据所有节点AP实际能够提供给客户端的带宽速率，将客户端接入最优网络的节点AP上，在接入之前对节点AP的网络状态进行判断，避免多个客户端接入在同一个网络较优的节点AP下，造成节点AP堵塞现象的出现。
可选地，在上述一种Mesh组网AP控制客户端接入的系统的实施例的基础上，本发明实施提供的一种Mesh组网AP控制客户端接入的系统的第一个可选实施例中，计算模块计算节点AP自身能够分配给客户端的实际带宽速率，计算公式为：
Pre_Allow_Through_Put＝Pre_Through_Put*(1-channel_utilization)
其中，Pre_Allow_Through_Put为节点AP能够分配给客户端的实际带宽速率，Pre_Through_Put为节点AP预估给客户端的带宽速率，channel_utilization为节点AP自身的信道利用率。
可选地，在上述一种Mesh组网AP控制客户端接入的系统的第一个可选实施例的基础上，本发明实施提供的一种Mesh组网AP控制客户端接入的系统的第二个可选实施例中，接收模块还用于基于所接收探测请求帧中的RSSI信息，判断客户端的RSSI值是否大于设定阈值，若是，则驱使查询模块基于探测请求帧中客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，若否，则结束。
本发明不局限于上述实施方式，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围之内。本说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技术。

Claims (10)

  1. 一种Mesh组网AP控制客户端接入的方法，其特征在于，包括以下步骤：
    Mesh网络的节点AP接收客户端发出的探测请求帧，所述探测请求帧中包括客户端的RSSI信息和MIMO信息；
    节点AP基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，获得节点AP预估给客户端的带宽速率；
    各节点AP根据预估给客户端的带宽速率，以及自身的信道利用率，计算出节点AP能够分配给客户端的实际带宽速率；
    各节点AP将计算出的实际带宽速率上报至Mesh网络控制节点，Mesh网络控制节点基于实际带宽速率将客户端接入最优节点AP。
  2. 如权利要求1所述的一种Mesh组网AP控制客户端接入的方法，其特征在于：所述速率表基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息测试得出，用于记录理想状态下节点AP能提供给客户端的带宽速率，且速率表由节点AP维护。
  3. 如权利要求1所述的一种Mesh组网AP控制客户端接入的方法，其特征在于，所述计算出节点AP能够分配给客户端的实际带宽速率，计算公式为：
    Pre_Allow_Through_Put＝Pre_Through_Put*(1-channel_utilization)
    其中，Pre_Allow_Through_Put为节点AP能够分配给客户端的实际带宽速率，Pre_Through_Put为节点AP预估给客户端的带宽速率，channel_utilization为节点AP自身的信道利用率。
  4. 如权利要求1所述的一种Mesh组网AP控制客户端接入的方法，其特征在于，所述Mesh网络控制节点基于实际带宽速率将客户 端接入最优节点AP，具体步骤为：
    Mesh网络控制节点选取所有上报的实际带宽速率中值最大实际带宽速率对应的节点AP，将客户端接入该节点AP中。
  5. 如权利要求1所述的一种Mesh组网AP控制客户端接入的方法，其特征在于，节点AP基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表之前，还包括：Mesh网络的节点AP接收客户端广播的探测请求帧，基于探测请求帧中的RSSI信息，判断客户端的RSSI值是否大于设定阈值，若是，则Mesh网络的节点AP基于客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，若否，则结束。
  6. 一种Mesh组网AP控制客户端接入的系统，其特征在于，包括：
    至少一节点AP，所述节点AP包括，
    -接收模块，其用于用于接收客户端发出的探测请求帧；
    -查询模块，其用于基于探测请求帧中客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，获得节点AP预估给客户端的带宽速率；
    -计算模块，其用于根据获得的节点AP预估给客户端的带宽速率和节点AP自身的信道利用率，计算节点AP自身能够分配给客户端的实际带宽速率；
    -通信模块，其用于将计算模块计算出的实际带宽速率上报至Mesh网络控制节点；
    -接入控制模块，其用于接收Mesh网络控制节点中仲裁模块的通知，允许对应客户端接入；
    Mesh网络控制节点，所述Mesh网络控制节点包括，
    -仲裁模块，其用于接收节点AP中通信模块上传的实际带宽速率，并基于实际带宽速率为客户端选择接入最优节点AP，通知最优节点AP允许客户端接入。
  7. 如权利要求6所述的一种Mesh组网AP控制客户端接入的系统，其特征在于，所述速率表基于客户端的RSSI信息和MIMO信息，以及节点AP的工作频段和频宽信息测试得出，用于记录理想状态下节点AP能提供给客户端的带宽速率，且速率表由节点AP维护。
  8. 如权利要求6所述的一种Mesh组网AP控制客户端接入的系统，其特征在于，所述计算模块计算节点AP自身能够分配给客户端的实际带宽速率，计算公式为：
    Pre_Allow_Through_Put＝Pre_Through_Put*(1-channel_utilization)
    其中，Pre_Allow_Through_Put为节点AP能够分配给客户端的实际带宽速率，Pre_Through_Put为节点AP预估给客户端的带宽速率，channel_utilization为节点AP自身的信道利用率。
  9. 如权利要求6所述的一种Mesh组网AP控制客户端接入的系统，其特征在于，所述仲裁模块接收节点AP中通信模块上传的实际带宽速率，并基于实际带宽速率为客户端选择接入最优节点AP，具体过程为：
    仲裁模块选取所有上报的实际带宽速率中值最大实际带宽速率对应的节点AP，该节点AP作为最优节点AP。
  10. 如权利要求6所述的一种Mesh组网AP控制客户端接入的系统，其特征在于，所述接收模块还用于基于所接收探测请求帧中的RSSI信息，判断客户端的RSSI值是否大于设定阈值，若是，则驱使查询模块基于探测请求帧中客户端的RSSI信息和MIMO信息，以及节点AP当前工作频段和频宽信息，查询速率表，若否，则结束。
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