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Medium access control method used for distributed multi-skip underwater acoustic communication network

A medium access control, acoustic communication technology, applied in wireless communication, network traffic/resource management, electrical components and other directions, can solve the problems of high complexity, low throughput, serious collision packet loss, etc. Apply flexible effects

Inactive Publication Date: 2014-11-19
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

[0004] aUT-Lohi can achieve high throughput performance, but the collision packet loss is serious; cUT-Lohi has a low collision packet loss rate, but the throughput is not high; ST-Lohi can achieve high throughput, but also has a low Collision packet loss rate, but ST-Lohi needs time synchronization, high complexity and high overhead
T-Lohi is an efficient, energy-saving, and stable-performance MAC protocol for underwater acoustic communication networks. However, it is designed for single-hop all-pass networks and is not suitable for multi-hop networks.

Method used

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  • Medium access control method used for distributed multi-skip underwater acoustic communication network
  • Medium access control method used for distributed multi-skip underwater acoustic communication network
  • Medium access control method used for distributed multi-skip underwater acoustic communication network

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Embodiment Construction

[0036] In this method, the packets transmitted in the network are divided into Tone packets and data packets, see figure 1 , the Tone packet is composed of four fields: "type", "sending node number", "receiving node number", and "priority value"; where the "type" field is used to indicate the competing tone is CT or pseudo-tone is PT, CT is used For reserved channels, PTs are used to create virtual competition to prevent data collisions caused by hidden terminal problems. For each node, the condition for sending PTs is: pt =T data +[γ(1,n min )-γ(1, n max )](τ max +T tone If the number of CTs received in ) is greater than 1 and it contains the CT sent to itself, then the PT will be sent; "sending node number" and "receiving node number" are the numbers of the sender and target receiver of the Tone packet respectively; "priority Weight" is used to mark the priority of the node currently participating in the competition. At the same time, there is a competition flag queue C...

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Abstract

The invention discloses a medium access control method used for the distributed multi-skip underwater acoustic communication network. The medium access control method includes: utilizing dynamic contend round to balance throughput and packet loss rate on the basis of T-Lohi protocol; solving the problems of terminal concealing and exposing by introducing pseudo tone mechanism and novel contender counting manner; solving the problem about fairness on the basis of priority contend strategy and setting pre-staying time at blocking state reasonably so that the T-Lohi protocol can be extended from the single-skip network to the multi-skip network. In the underwater acoustic signal channel environment, the tone reservation mode in the protocol is higher in efficiency and reliability than the conventional carrier interception mode and the RTS / CTS (request to send / clear to send) handshaking system and performance of the protocol is stable.

Description

technical field [0001] The invention relates to a medium access control technology of a data link layer of a wireless sensor network, in particular to a medium access control method for a distributed multi-diving underwater acoustic communication network, belonging to the technical field of underwater acoustic signal processing. Background technique: [0002] Due to the long propagation delay characteristics of the underwater acoustic channel, in the channel access mode of the competitive MAC protocol, the random access mode (such as Aloha) has serious collision and packet loss, and the energy efficiency is too low; the carrier sense method (such as CSMA) requires The long listening time and the unreliable channel state detected also cause inefficiency. Therefore, the competitive MAC protocol of the underwater acoustic communication network mostly adopts the access method based on the reservation mechanism to reduce the collision packet loss rate and improve energy efficienc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/04H04W74/08
Inventor 李霞方世良杨文苏阳周景锦张博天
Owner SOUTHEAST UNIV