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Media access control method based on recognition of correlative sequences

A media access control and related sequence technology, applied in electrical components, wireless communication, etc., can solve the problems of channel efficiency network performance degradation, failure to keep up with the development speed, and proportional increase, so as to improve network throughput and eliminate competition process , the effect of reducing costs

Inactive Publication Date: 2015-02-25
PLA UNIV OF SCI & TECH
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Problems solved by technology

However, the development of the MAC layer protocol has not kept up with the development speed of the high-speed data transmission technology at the physical layer. Taking the 802.11 protocol family in the wireless local area network as an example, the data rate supported by IEEE 802.11a can reach up to 54Mbps, while the latest 802.11ac can Supports data rates up to 6.93Gbps
According to the provisions of the MAC protocol, the control messages necessary for the protocol do not benefit from the high-speed transmission technology, and the control messages must be transmitted at the lowest rate supported by the protocol to ensure its reliability. Therefore, although the data transmission rate has increased, the data The proportion of transmission time in the channel usage time will not necessarily increase, or even decrease, which will cause a decrease in channel efficiency and overall network performance

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  • Media access control method based on recognition of correlative sequences
  • Media access control method based on recognition of correlative sequences

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specific Embodiment approach

[0019] The invention proposes a media access control method based on correlation sequence identification, which mainly includes two parts: physical layer control message design and MAC layer channel competition design. The specific implementation method is:

[0020] 1. Physical layer control message design

[0021] Physical layer control messages are expressed by relative sequences, and each node in the network has a unique sequence as its node identifier. This node identity can be identified through correlation operations. The identification sequence of each node is a private sequence, which can only be identified by this node. In addition, define the public sequence channel reservation sequence and channel release sequence, these two sequences can be identified by all nodes.

[0022] The length of the related sequence is determined by the number of nodes in the network. If the number of nodes is N, the length of the sequence is at least N+2.

[0023] 1. MAC layer channel...

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Abstract

The invention provides a media access control method based on recognition of correlative sequences. Different nodes are recognized through correlative sequences, different control messages are transmitted through the combination of the correlative sequences and a micro-timeslot mechanism, and the contradiction between high-speed data and low-speed control messages in the traditional MAC (media access control) protocol is relieved. The control messages are transmitted through the correlative sequences, control sequences and data packets are transmitted in the same time by the aid of the interference elimination technology, the explicit competition process of the traditional media access control protocol is eliminated, expenditure on conventional control message transmission and time of binary exponential backoff are reduced, and channel utilization rate and network throughput are increased.

Description

technical field [0001] The invention relates to a media access control method based on correlation sequence identification. The method can replace the control message in the traditional media access control protocol with a related sequence, so that the control message can be sent simultaneously with the data packet, thereby reducing the overhead of control message transmission and the time consumption of exponential backoff. Background technique [0002] In recent years, with the rapid development of OFDM (Orthogonal Frequency Division Multiplexing), MIMO (Multiple Input Multiple Output) and other technologies, the data transmission rate has been greatly improved. However, the development of the MAC layer protocol has not kept up with the development speed of the high-speed data transmission technology of the physical layer. Taking the 802.11 protocol family in the wireless local area network as an example, the data rate supported by IEEE 802.11a can reach up to 54Mbps, whil...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/04
CPCH04W74/04H04W74/085
Inventor 牛大伟李艾静王海董超于卫波米志超
Owner PLA UNIV OF SCI & TECH
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