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Distributed multiple-channel multiple-access method based on parallel cooperation

An access method and multi-channel technology, applied in the field of multi-access access, can solve problems such as inability to adapt to dynamic changes in available channels, high complexity, and difficult implementation, so as to achieve the effect of improving the cooperative transmission rate and ensuring system performance

Inactive Publication Date: 2016-06-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the parallel cooperation method can effectively increase the data transmission rate and reduce the packet delay, there are still many problems in this protocol: first, the protocol is based on time synchronization, which is difficult to implement and has high complexity; second, CoopMC It is assumed that the sending and receiving nodes in the network have already known the best cooperative node information in advance, which is inconsistent with the actual situation; third, the protocol cannot adapt to the dynamic change of the number of available channels in the network

Method used

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  • Distributed multiple-channel multiple-access method based on parallel cooperation
  • Distributed multiple-channel multiple-access method based on parallel cooperation
  • Distributed multiple-channel multiple-access method based on parallel cooperation

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] The present invention can be implemented in the wireless network card through firmware, or in the driver program of the wireless network card. The implementation of the present invention will be described in detail below in conjunction with examples.

[0032] 1. The construction method of the data channel usage list

[0033] Each node using the access method of the present invention will create and maintain two structured linked lists: a data channel usage list DCUL (DataChannelUsageList) and an available channel list ACL (AvailableChannelList). Among them, DCUL stores the data channel usage information of all neighboring nodes, and ACL stores the data channel labels that the current node can use. The details of DCUL and ACL are as follows:

[0034] The structure in DCUL has the following variables:

[0035] channel: This variable is used to st...

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Abstract

The invention provides a distributed multiple-channel multiple-access method based on parallel cooperation, relating to the technical field of communication. In the invention, a handshaking process and a data transmission process are mainly controlled; the handshaking process is controlled as follows: after a node is successful in competition in a common control channel according to a distributed coordination function mechanism, a source node and a target node interact control information in a control channel, such that data processing is completed; and the data transmission process is controlled as follows: a transceiving node and a cooperation node complete transmission of data packets in a negotiated data channel according to a cooperation strategy. Because the transceiving node in a network only needs a set of transceiver, the implementation process is simple; because cooperation transmission is adopted, the number of the data packets transmitted in each TXOP is increased; the network throughput is greatly increased; the average packet delay is reduced; and in addition, a distributed working manner is adopted, such that a central control node and the whole-network time synchronization are unnecessary.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a multiple access method in a multi-channel environment. Background technique [0002] At present, multiple available frequency channel resources have been provided in the IEEE802.11 standard. For example, there are three non-overlapping channels of 20MHz in the 2.4GHz frequency band, and more than 20 non-overlapping available channels of 20MHz in the 5GHz frequency band. And with the continuous growth of the number of mobile users and the continuous increase of users' demand for large-bandwidth services, such as video conferencing and other services, channel resources become more and more tense. Therefore, how to design an efficient multi-channel multiple access (Multi-channel MAC, McMAC) protocol to maximize the use of the current limited channel resources has become a research hotspot of concern. However, due to the fading characteristics of the wireless channel, when t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04W72/12H04W74/00
CPCH04L1/0002H04L1/0077H04W72/1215H04W72/1221H04W74/002
Inventor 李波杨博闫中江杨懋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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