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MAC layer transmission protocol design method with limited control overhead

A transmission protocol and overhead control technology, applied in the field of communication, can solve the problems of finding damaged nodes, data loss, energy waste, etc.

Active Publication Date: 2019-02-15
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for wireless sensor networks with high link reliability requirements and limited control overhead, the S-MAC protocol cannot detect damaged nodes through the message transfer mechanism with limited control overhead and notify the source node to change the sending path in time, resulting in data loss. , a waste of energy

Method used

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  • MAC layer transmission protocol design method with limited control overhead
  • MAC layer transmission protocol design method with limited control overhead
  • MAC layer transmission protocol design method with limited control overhead

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Embodiment Construction

[0117] The following examples illustrate the present invention in further detail.

[0118] This patent covers Figure 1 to Figure 6 Six message data formats, in which the ID fields of network nodes include Source ID, Dest ID and Nexthop ID, which are determined by the scale of the network. Assuming that m is the number of nodes in the network topology, then In order to represent the minimum number of binary digits required for m nodes; the Packet Type field is determined by the number of message types, and the six message formats only need 3-bit data bits; the Packet ID is determined according to the amount of network data sent, and the 4-bit Packet in this patent ID is enough to explain the advantages of this patent; HopCount is set to 4bit because it is considered that 4bit is enough for the general network scale, which is consistent with the classic RIP routing protocol. If it does not match the network scale, this value can be adjusted appropriately; the Data field is de...

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Abstract

The invention belongs to the field of communication and specifically relates to a MAC layer transmission protocol design method with limited control overhead. The method comprises the steps of initializing to generate a DATA message, sending an RTS (Request to Send) message, receiving the RTS message, sending a CTS (Clear to Send) message, receiving the CTS message, sending the DATA message, receiving the DATA message, sending a REQ message, receiving the REQ message, sending an SRQ (Selective Automatic Repeat Request) message, receiving the SRQ message, sending an ACK (Acknowledgement) message, receiving the ACK message and so on. By monitoring a channel reservation request RTS message sent by the next hop node and the REQ message of the next second hop node, the MAC layer transmission protocol design method with limited control overhead can judge correctness of the message transmission thereof, and accordingly can adjust and modify path information in time to solve problems of circumvention of invalid relay nodes and restoration of an interrupted transmission link. Network congestion, even network paralysis, caused by invalidity of transmission links, is avoided efficiently without adding any extra control message field within the limited control overhead, robustness of message transmission links is accordingly enhanced, the network lifecycle is prolonged and the MAC layer transmission protocol design method with limited control overhead is enabled to be more applicable to wireless sensor networking demands.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a design method of a MAC layer transmission protocol applicable to a wireless sensor network with limited control overhead. Background technique [0002] Contention-type MAC protocol is a kind of MAC protocol classified according to channel allocation method. When a wireless node needs to send data, it actively preempts the channel. When other wireless nodes within its communication range need to send data, it will also initiate the preemption of the wireless channel. This requires a corresponding mechanism to ensure any time in the communication. Only one wireless node in the area can obtain the right to use the channel. The S-MAC protocol is proposed by Wei Ye et al. of US / ISI on the basis of the 802.11MAC protocol as a competition-based MAC protocol for wireless sensor networks. The S-MAC protocol is improved in three aspects to meet the needs of sensor networks to redu...

Claims

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Application Information

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IPC IPC(8): H04W24/04H04W40/04H04W80/02H04W84/18H04L12/703H04L12/733H04L12/741H04L45/122H04L45/28H04L45/74
CPCH04L45/20H04L45/28H04L45/74H04W24/04H04W40/04H04W80/02H04W84/18
Inventor 刘彤杨帆张林波徐瑛程郝婧
Owner HARBIN ENG UNIV
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