System and method for reserving wireless mesh network channel resources with no interference to surrounding nodal points

Abstract

The invention relates to a system and a method for reserving wireless mesh network channel resources with no interference to surrounding nodal points. The method comprises the steps: (1) a source node sends remote transmission request (RTR) towards the destination node path direction in a common signal channel; (2) a middle node receives RTR of a previous hop node and then judges whether the reservation can be established or not, if the reservation can be performed, an acknowledgement character (ACK) is returned to the previous hop node in the common signal channel and simultaneously reserved radio frequency is switched to a reserved signal channel, then a destination node is judged, if the destination node is confirmed, the step (3) is performed, if not, the RTR is transmitted to a next hop node in the common signal channel and the step (2) is performed. If the reservation cannot be established, negative acknowledge (NAK) is returned to the previous hop node, the previous hop node receives the NAK, then sends noise temperature ratio (NTR) towards the source node direction and releases the reserved signal channel hop by hop, and the reservation establishing fails; (3) the destination node sends click through rate (CTR) towards the source node direction through the reserved signal channel. The middle node on the path receives and transmits the CTR, a final source node receives the CTR, and the reservation establishing work is finished.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to a wireless mesh network channel resource reservation system and method without interference to surrounding nodes. Background technique [0002] A wireless mesh network (also called a wireless Mesh network) is a network characterized by wireless multi-hop relays that combines a mobile Ad hoc network with an infrastructure network structure. The wireless mesh network is similar to the mobile Ad hoc network in terms of network topology, but most nodes in the network are in a static or weakly mobile state, and the topology changes little; the difference in business mode is the biggest difference between the wireless mesh network and the mobile Ad hoc network. The mobile Ad hoc network bears the traffic between any pair of nodes, while the wireless mesh network mainly bears the traffic to and from the Internet gateway, and a small amount of traffic between any pair of nodes. Wi...

AI Technical Summary

Problems solved by technology

The disadvantage of DARE is that it requires strict network synchronization, and it is difficult to achieve the desired effect by mixing the conflict-based DCF mechanism with DARE

[0008] The main reason why traditional resource reservation methods are difficult to use in wireless multi-hop networks is to prevent the data transmission in the reserved path from being damaged by the interference of surrounding nodes and suppress the data transmission of adjacent nodes, resulting in low network efficiency.

Resource reservation methods proposed in recent years usually require strict network synchronization, which is difficult to achieve for larger-scale wireless multi-hop networks

There are generally two deficiencies in the existing resource reservation research. One is that the channel interference is not considered enough in the simulation verification environment, and the other is that the advantages of multiple channel resources are not fully utilized.

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