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A Carrier Sense-Based Protocol Sequence Channel Access Algorithm

A channel access method and protocol sequence technology, applied in the field of carrier sense-based protocol sequence channel access algorithm, can solve the problem of low channel utilization, achieve synchronization, improve channel utilization, and improve system throughput and the effect of transmission delay

Active Publication Date: 2020-05-22
NANJING UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

[0004] The present invention aims to provide a protocol sequence channel access algorithm based on carrier sensing to solve the problem that the traditional protocol sequence requires that the channel time corresponding to each sequence value be consistent, so compared with the CSMA mechanism, the channel utilization rate is lower.

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  • A Carrier Sense-Based Protocol Sequence Channel Access Algorithm
  • A Carrier Sense-Based Protocol Sequence Channel Access Algorithm
  • A Carrier Sense-Based Protocol Sequence Channel Access Algorithm

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0018] A protocol sequence channel access algorithm based on carrier sense, which retains the original deterministic transmission characteristics of the protocol sequence channel access mechanism, that is, when the sequence value of the time slot is 1, the node sends a data packet; When the sequence value is 0, the node remains quiet. The deterministic sending scheme ensures that the user's maximum transmission delay will not exceed one sequence period, that is, at least...

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Abstract

The invention proposes a protocol sequence channel access algorithm based on carrier interception. The algorithm comprises the steps: firstly distributing a binary protocol sequence to each network node, and reading the sequence values sequentially; secondly transmitting a data group with a non-fixed length when the current sequence value is one, and determining the moment of keeping silent according to a channel interception result when the current sequence value is zero. Compared with a conventional protocol sequence channel access mechanism, the method is more suitable for a network scene comprising various types of data businesses. Moreover, the time delay performance is remarkably superior to a p-persistence CSMA channel access mechanism.

Description

technical field [0001] The invention relates to the technical field of wireless medium access control for wireless sensor networks and mobile ad hoc networks, in particular to a protocol sequence channel access algorithm based on carrier sense that supports non-fixed-length data packet transmission. Background technique [0002] Massey and Mathys defined the no-feedback conflict channel model in 1985, and proposed a new wireless channel access mechanism, called protocol sequence. The protocol sequence is a definite periodic binary sequence, which allows each node to determine the data transmission time according to the assigned protocol sequence. In the protocol sequence channel access mechanism, nodes read the sequence value in turn, if the value is 1, send data, otherwise keep quiet. Compared with TDMA, the protocol sequence does not require strict time synchronization; compared with random access protocols such as ALOHA, the protocol sequence can provide short-term perfo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04W56/00
CPCH04W56/00H04W74/0808
Inventor 张一晋房玉轩张茗周远达邹爱洁关凤瑜桂林卿
Owner NANJING UNIV OF SCI & TECH
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