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Cognitive radio network frequency hopping communication method supporting node priorities

A cognitive wireless network and node-supporting technology, applied in the field of communication interaction mechanism design, can solve problems such as inability to distinguish communication priority levels, unfavorable communication transmission performance of cognitive wireless network, and inability to reduce communication transmission performance

Inactive Publication Date: 2016-03-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this control information exchange mechanism can ensure that any transmit frequency hopping sequence and any receive frequency hopping sequence can achieve frequency hopping aggregation on all accessible channels, it will cause all cognitive transmitting and receiving node pairs to have the same The average aggregation time interval of , cannot distinguish different communication priority levels for different pairs of cognitive sending and receiving nodes, so that it cannot provide superior importance for cognitive sending and receiving node pairs with higher importance (such as network backbone nodes) Lower communication transfer performance for cognitive sending and receiving node pairs (e.g. network end nodes)
At the same time, the channel load generated by this interaction mechanism is also relatively large, which is not conducive to the improvement of the overall communication transmission performance of the cognitive wireless network.

Method used

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  • Cognitive radio network frequency hopping communication method supporting node priorities
  • Cognitive radio network frequency hopping communication method supporting node priorities
  • Cognitive radio network frequency hopping communication method supporting node priorities

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Example of Cognitive Transmit and Receive Frequency Hopping Sequence Generation Algorithms Supporting Node Priority

[0049] When the total number of authorized channels is N=8, since the integer 8 has only two non-1 true factors 4 and 2, the cognitive frequency hopping communication mechanism supporting node priority proposed by the present invention can support up to 2 node priority level, ie M=2. Among them, the time interval for the low priority sending and receiving nodes to achieve two consecutive convergences is q 1 = 4 time slots, and the time interval between high-priority sending and receiving nodes to achieve 2 consecutive aggregations is q 2 = 2 time slots.

[0050] According to the constraints, the channel interval r of a single frequency hop of a low-priority cognitive sending node 1,s can be set to r 1,s = 1, while the channel interval r of a single frequency hop of the low priority cognitive receiving node 1,t can be set to r 1,t =1. At this time,...

Embodiment 2

[0068] An example of an existing cognitive transmit and receive frequency hopping sequence generation algorithm that does not support node priority

[0069] The existing cognitive sending and receiving frequency hopping sequences are obtained based on a generation algorithm of synchronous frequency hopping sequences without distinguishing priorities. In this algorithm, the number N of authorized channels must be an even number, and each sending frequency hopping sequence for the next N 2 Periodic repetition of a sequence of / 2 elements:

[0070] {b i +0moduloN,b i +1moduloN,...,b i +N-1moduloN,(b i +2)+0moduloN,(b i +2)+1moduloN,...,(b i +2)+N-1moduloN,...,(b i +N-2)+0moduloN,(b i +N-2)+1moduloN,...,(b i +N-2)+N-1moduloN}, where, b i , i∈[1,N / 2], represents the sending frequency hopping sequence The initial channel where it is located, and satisfies b 1 =b 2 =...=b N / 2 modulo2.

[0071] At the same time, each received frequency hopping sequence ψ i is an N-e...

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Abstract

The invention belongs to the technical field of communication, and particularly relates to a communication interaction mechanism design based on frequency hopping for a cognitive radio network. Transceivers of cognitive transmitting or receiving nodes hop periodically on all N authorized channels according to a certain frequency hopping sequence, so that the aim of fully utilizing idle authorized spectrum resources on the premise of avoiding interference on authorized user communication is fulfilled. At the start of time slots, the transceivers are switched to new authorized channels firstly by the transmitting or receiving nodes, and then real-time spectrum sensing is performed on the authorized channels. Being similar to an existing cognitive radio network control information interaction method based on frequency hopping, a control information interaction method based on frequency hopping and supporting node priorities provided by the invention is characterized in that periodical frequency hopping convergence of cognitive transmitting and receiving nodes having the same priorities on all accessible channels can be realized.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a communication interaction mechanism design based on frequency hopping for a cognitive wireless network. Background technique [0002] In order to flexibly use the idle spectrum resources of the licensed network for communication without interfering with the licensed network communication, the cognitive wireless network needs to have a set of efficient control information interaction mechanism to realize the transmission between cognitive nodes, including spectrum sensing results, A large amount of control information such as clock synchronization and communication frequency band reservation. The control information interaction method based on frequency hopping can flexibly and quickly find the communication frequency band (or channel) that is not occupied by authorized users by continuously changing the communication frequency band (or channel) of the cognitiv...

Claims

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Application Information

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IPC IPC(8): H04W72/10H04B1/7136
CPCH04B1/7136H04W72/56
Inventor 谭雪松吴玉香
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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