WO2018054043A1

WO2018054043A1 - Method and system for forwarding broadcast packet in ble network

Info

Publication number: WO2018054043A1
Application number: PCT/CN2017/080340
Authority: WO
Inventors: 陈道远; 宋德超; 华洪香
Original assignee: 珠海格力电器股份有限公司
Priority date: 2016-09-26
Filing date: 2017-04-13
Publication date: 2018-03-29
Also published as: CN106658355A; CN106658355B

Abstract

The present invention relates to a method and system for forwarding a broadcast packet in a Bluetooth low energy (BLE) MESH network. The BLE network comprises a gateway and multiple BLE modules, one of the BLE modules being determined as a target module of the broadcast packet. The method comprises: set a maximum number of times T a broadcast packet is allowed to be forwarded; the gateway transmits the broadcast packet to a target module; the BLE module receiving the broadcast packet determines whether the BLE module is the target module; if yes, broadcast a reply packet; or if not, determine whether the number of forwarding times of the broadcast packet is greater than T so as to determine whether to forward the broadcast packet. The method and the system of the present invention can prevent a broadcast packet from being repeatedly forwarded without limitation, and effectively save the time of processing the repeated broadcast packet, thereby avoiding a waste of resources, and greatly increasing the network speed.

Description

Method and system for forwarding broadcast packets in Bluetooth BLE network

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and system for forwarding a broadcast packet in a Bluetooth BLE network.

Background technique

Bluetooth low energy (ie Bluetooth BLE (abbreviation of Bluetooth Low Energy)) After the MESH networking, the communication between the BLE module and the BLE module does not need to be connected, but is broadcasted. The advantage of this communication method is that There is no need to perform a handshake connection when communicating, saving time, and when the number of BLE modules is very large, the communication time is greatly shortened because no connection is required, as shown in Figure 1.

However, this communication method has its disadvantages at the same time: since the inter-module communication does not need to be connected, when one of the BLE modules transmits data to another BLE module, the broadcast packet transmitted by the BLE module in the MESH network can be Received and forwarded. If the number of BLE modules is large, a large number of forwarded packets can easily cause network congestion in the MESH network, which in turn reduces communication speed.

Summary of the invention

The main purpose of the present invention is to provide a method and system for forwarding broadcast packets in a Bluetooth low energy (BLE) MESH network. By limiting the number of broadcast packets, the MESH network congestion can be effectively alleviated and the network communication speed can be improved. . Moreover, by sequence identification, the time for the existing BLE module to process the same broadcast packet can be greatly saved.

To achieve the above object, an aspect of the present invention provides a method for forwarding a broadcast packet in a Bluetooth BLE network, the Bluetooth BLE network including a gateway and a plurality of BLE modules, wherein one BLE module is determined to be a destination module of a broadcast packet. , wherein the method comprises:

Set the maximum number of times the broadcast packet is allowed to be forwarded T;

The gateway sends a broadcast packet to the destination module;

Claims

The BLE module that receives the broadcast packet determines whether it is the destination module;

If yes, broadcast the reply packet;

If not, it is determined whether the number of times the broadcast packet is forwarded is greater than T to determine whether to forward the broadcast packet.

Preferably, the method further comprises: if the number of times the broadcast packet is forwarded is greater than T, requesting the gateway to resend the broadcast packet; otherwise, the module forwards the broadcast packet.

Preferably, the method further includes: determining whether the number of retransmissions of the broadcast packet is greater than a predetermined number of allowed retransmissions R before determining whether the number of times the broadcast packet is forwarded is greater than T, and if R is less than or equal to R, It is further determined whether the number of times the broadcast packet is forwarded is greater than T.

Preferably, in a case where the number of retransmissions of the broadcast packet is greater than R, the broadcast packet is discarded, and the transmission error information is returned.

Preferably, when the BLE module that receives the broadcast packet is not the destination module, the number of times of forwarding and the module serial number identifier are added to the broadcast packet.

Preferably, in the case that the BLE module that receives the broadcast packet is determined to be the destination module, the module first determines whether the received broadcast packet is the first time the broadcast packet is received, and if so, broadcasts the reply packet, otherwise, discards the broadcast. package.

Preferably, the module increases the fastest arrival channel information of the broadcast packet delivery destination module in the broadcast packet while broadcasting the reply packet.

Preferably, any module does not forward the broadcast packet for which the reply packet is directed when the reply packet is received.

Preferably, when the gateway sends the broadcast packet to the destination module, the broadcast packet includes a sequence number identifier for the destination module to determine whether it is received for the first time when receiving the broadcast packet.

Preferably, the method further comprises: setting a waiting time, if the gateway does not receive the reply packet returned by the destination module within the waiting time, resending the broadcast packet.

Preferably, the gateway determines whether the number of retransmissions exceeds a predetermined number of allowed retransmissions R before resending the broadcast packet, and if so, the broadcast packet is no longer sent, and the failure information is returned.

To achieve the above object, another aspect of the present invention provides a system for forwarding a broadcast packet in a Bluetooth BLE network, the Bluetooth BLE network including a gateway and a plurality of BLE modules, wherein one BLE module is determined to be a broadcast packet. Module, wherein the system includes: