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A Medium Access Control Method Based on Implicit Contention

A medium access control and implicit competition technology, applied in advanced technology, climate sustainability, sustainable communication technology, etc., can solve the problems of occupying channel time, channel waste, etc., to reduce overhead, improve utilization efficiency, improve The effect of network throughput

Inactive Publication Date: 2019-04-23
PLA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the control messages required to compete for the channel are transmitted at the lowest rate, a large amount of channel time is taken up, and this channel waste becomes more serious as the data transmission rate increases

Method used

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  • A Medium Access Control Method Based on Implicit Contention
  • A Medium Access Control Method Based on Implicit Contention
  • A Medium Access Control Method Based on Implicit Contention

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Experimental program
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specific Embodiment approach

[0025] The invention proposes a media access control method based on implicit contention, which mainly includes two parts: physical layer control message design and MAC layer channel competition design. The specific implementation method is:

[0026] 1. Physical layer control message design

[0027] Physical layer control messages are represented by pulses on a time-frequency-domain two-dimensional diagram (TF diagram). The TF map is a two-dimensional matrix, each row represents a subcarrier, and each column represents a symbol. The value of each element is a Boolean type. A value of 1 indicates that a pulse is detected at the subcarrier and symbol position, and a value of 0 indicates that this No pulses were detected at the subcarrier and symbol positions. Establish the mapping relationship between the serial number of the communication node and the position of the TF graph:

[0028]

[0029] Here the mapping relation adopts

[0030] Sending node ID = subcarrier ID

...

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Abstract

The invention discloses a media access control method based on implicit competition. According to the method, high-energy pulse signals on some sub-carriers of orthogonal frequency division multiplexing signals are transmitted to transmit control information, so that the control information and a data packet can be sent at the same time. Explicit competition of the traditional media access control protocol is transformed into implicit competition, only a continuous data sending process is seen in the time domain, the overhead of routine control information transmission is reduced, and the channel utilization rate and network throughput are improved.

Description

technical field [0001] The invention relates to a medium access control method based on implicit contention. The method can transform the explicit contention in the traditional medium access control protocol into implicit contention, allowing control messages and data packets to be sent at the same time. Reduced overhead for control message transmission. Background technique [0002] In recent years, high-speed data transmission technology has developed very rapidly, such as OFDM (Orthogonal Frequency Division Multiplexing) technology, MIMO (Multiple Input Multiple Output) technology, etc. These technologies have greatly improved the data transmission rate. In order to adapt to these physical layer technologies, many A supplementary standard for the wireless local area network media access control protocol was proposed. Typical wireless network standards include IEEE 802.11a, IEEE 802.11n, IEEE802.11ac, etc., and the data rate supported by it has increased from the original...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04L27/26
CPCY02D30/70
Inventor 王海董超李艾静于卫波牛大伟米志超
Owner PLA UNIV OF SCI & TECH