New node network accessing synchronizing method of wireless multi-hop collaboration network

Abstract

The invention discloses a new node network accessing synchronizing method of a wireless multi-hop collaboration network. The new node network accessing synchronizing method comprises the following steps of S1, periodically broadcasting MSH-NCFG information in a network node; S2, performing network accessing scanning on the new node, establishing a physical neighbor list, and selecting a plurality of pre-selected sponsor nodes; S3, enabling the new node to select one of pre-selected sponsor nodes to perform coarse synchronizing; S4, enabling the new node to start a timer, and carrying the MSH-NENT information of each pre-selected sponsor node information to the broadcast of each neighbor node; S5, enabling the pre-selected sponsor node receiving the MSH-NENT information to calculate the transmission delay between the pre-selected sponsor node and the new node, and reply NCFG-NEO information to the new node; S6, after the timing of the timer is reached, enabling the new node to select one sponsor node from the pre-selected sponsor node corresponding to the received NCFG-NEO information, and performing fine synchronizing; S7, enabling the new node to judge whether the reference node of the coarse synchronizing and the reference node of the fine synchronizing are the same node or not; when the reference node of the coarse synchronizing and the reference node of the fine synchronizing are not the same node, compensating the error of coarse synchronizing. The new node network accessing synchronizing method has the advantage that the accurate synchronizing of new node and network is realized.

Description

technical field [0001] The invention relates to the technical field of wireless communication. More specifically, it relates to a network access synchronization method for new nodes in a wireless multi-hop cooperative network. Background technique [0002] IEEE 802.16 wireless Mesh network is a TDD-based self-organizing self-synchronizing multi-hop cooperative network, and the synchronization mechanism is the premise to ensure the normal communication of the TDD system. Each node must be synchronized with the network in order to correctly receive network signals and communicate with other nodes in the network. Therefore, in a wireless multi-hop cooperative network based on a TDD system, the quality of the clock synchronization mechanism has a great influence on the performance of the system. big impact. [0003] The design of the synchronization mechanism in the node network process mainly includes coarse synchronization and fine synchronization. Clock synchronization bet...

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Problems solved by technology

[0010] The purpose of the present invention is to provide a network access method for a new node in a wireless multi-hop cooperative network, so as to solve the existing network access synchronization mechanism of the wireless multi-hop cooperative network. When the reference nodes of the coarse synchronization and the fine synchronization of the new node are different, it may occur The problem of sync errors

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