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Novel cognitive radio multi-channel MAC protocol

A cognitive radio and multi-channel technology, applied in wireless network protocols, wireless communication, electrical components, etc., can solve problems such as channel unavailability and channel resource waste

Active Publication Date: 2011-06-22
青海西部矿业科技有限公司
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Problems solved by technology

However, since HCh is selected by the node before transmitting data, and remains until the channel is unavailable
If there is no data transmission between two nodes, one HCh will also be occupied, which will lead to a waste of channel resources

Method used

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Embodiment Construction

[0032] The specific implementation is as follows: This method proposes a new cognitive radio multi-channel MAC protocol, which uses a controller to sense channels in sequence and defines channel availability. Its goal is to reduce the frequency of channel switching while reducing the impact of interference, thereby increasing the throughput of the network. It is mainly divided into two stages: channel information collection period and channel selection period. Figure 4 .

[0033] It is assumed that data transmission is to be carried out between transmitter A and receiver B, C is the neighbor node of B, and Ctrl is the control machine. The "transmitter" is the host that sends the MAC data frame, the "receiver" is the host that receives the MAC data frame, and the "controller" is responsible for sensing the busy or idle state of the channel. Then A and B will be processed according to the following steps:

[0034] Step 1: The information collection period of the control mach...

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Abstract

The invention provides a cognitive radio multi-channel measurement and control (MAC) protocol. The protocol has the basic thought of improving network performance by using the characteristic of dynamic change of frequency spectrum of a cognitive radio multi-channel environment. At a frequency spectrum cognition stage, the protocol discovers available idle frequency spectrum in a synchronous time slot mode by adopting a method for perceiving the frequency spectrum in sequence by a controller. Meanwhile, the protocol defines the channel availability, and preferably selects an idle channel with high availability for data transmission. The protocol ensures reduction of cognitive user conflicts and reliability of data channels in a cognitive radio network so as to improve the throughput of the cognitive radio network.

Description

technical field [0001] The invention relates to the technical field of radio transmission, in particular to a novel cognitive radio multi-channel MAC protocol. Background technique [0002] At present, as the demand for wireless communication continues to grow, the spectrum resources of wireless communication become increasingly tight, which becomes a new bottleneck restricting the development of wireless communication. On the other hand, the spectrum resources that have been allocated to many existing wireless systems are idle to varying degrees in time and space [1]. In order to solve the problem of scarcity of spectrum resources, cognitive radio technology has been proposed. [0003] So far, research on the MAC layer of cognitive radio is still in its infancy. The IEEE 802.22 working group is developing a standard for the MAC layer of cognitive radio, which is based on the reuse of spectrum allocated to TV broadcasting service bands. The 802.22 MAC layer is centralized...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W16/14H04W74/08H04W80/02
Inventor 林大泽张永德周贤伟黄秋香张鸣鲁李永芳赵丹萍
Owner 青海西部矿业科技有限公司
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