A wireless chain multi-hop cross-layer method for time slot multiplexing

A technology of time slot multiplexing and wireless chain, applied in wireless communication, synchronization devices, electrical components, etc., can solve the problem of channel waste and other issues

Active Publication Date: 2019-08-13
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional TDMA mechanism allocates different time slots for each node, which will cause a waste of channels

Method used

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  • A wireless chain multi-hop cross-layer method for time slot multiplexing
  • A wireless chain multi-hop cross-layer method for time slot multiplexing
  • A wireless chain multi-hop cross-layer method for time slot multiplexing

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Such as figure 1 As shown, the slot frame structure in the present invention is the slot cycle, which is composed of control slots and data slots. Control slots include slot 0 and slot 1. Nodes regularly send and receive HELLO messages in time slot 0. The Hello broadcast message contains all the neighbor nodes and their link information of the Ad Hoc network node. Each node in the network completes the link through the link information in the Hello broadcast message. Probing, adjacent area detection; the node sends RREQ and RREP messages in time slot 1 for route discovery and route establishment. The data slots include slot 2, slot 3 and slot 4. After the route is established, nodes receive and send data packets in data slots. The present invention uses three time slots for data transmission to ensure that any two nodes outside the t...

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Abstract

The present invention relates to a timeslot multiplexing wireless chain multi-hop cross-layer optimization method, which is applicable to wireless long-distance chain multi-hop communication. A chain multi-hop timeslot allocation algorithm is designed by combining a TDMA channel access mechanism with an AODV routing protocol, and a transmit-receive timeslot is allocated to each node, to ensure that a same timeslot is allocated to any two nodes outside a two-hop neighbor node range, and implement cross-layer optimization. Because neighbor nodes in a two-hop range easily conflict, three timeslots need to be allocated for data transmission. A transmit-receive timeslot of a node is allocated by using a routing control message of a network layer without adding overhead of another control message. According to the optimization method, a channel waste problem caused by conventional TDMA is resolved in a timeslot deployment manner by using a cross-layer design method and comprehensively considering a TDMA network feature.

Description

technical field [0001] The invention relates to a wireless chain type multi-hop cross-layer optimization method for time slot multiplexing, which belongs to the field of wireless network communication. Background technique [0002] In the wireless multi-hop network, the source node to the destination node is composed of multi-hop wireless links. Any node can act as an end node to generate or receive data packets, and can also act as an intermediate node to forward data packets from other nodes. Extend network coverage and realize wireless long-distance communication. [0003] Nowadays, wireless multi-hop networks are widely used in remote monitoring and industrial plants and stations, but in special environments such as roads, railways, mine roadways, underground tunnels, rivers, bridges, etc., multi-hop nodes can only be deployed in narrow and long areas to form chained wireless networks. Multi-hop network. Usually, the 802.11DCF protocol is used as the MAC layer access m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/04H04W56/00H04W72/04H04W74/00
CPCH04W40/04H04W56/002H04W72/0446H04W74/002
Inventor 孙彦景高郁卿简毅李松曹起左海维
Owner CHINA UNIV OF MINING & TECH
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