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A Frequency Hopping Communication Method for Cognitive Wireless Networks Supporting Node Priority

A cognitive wireless network and node support technology, applied in the field of communication interaction mechanism design, can solve the problems of inability to distinguish communication priority levels, low communication transmission performance, and large channel load

Inactive Publication Date: 2018-12-11
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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  • A Frequency Hopping Communication Method for Cognitive Wireless Networks Supporting Node Priority
  • A Frequency Hopping Communication Method for Cognitive Wireless Networks Supporting Node Priority
  • A Frequency Hopping Communication Method for Cognitive Wireless Networks Supporting Node Priority

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Examples of generation algorithm for cognitive sending and receiving frequency hopping sequence 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 priorities. Level, namely M=2. Among them, the time interval for the low-priority sending and receiving nodes to achieve 2 consecutive convergences is q 1 = 4 time slots, and the time interval for high-priority sending and receiving nodes to achieve 2 consecutive convergences is q 2 = 2 time slots.

[0050] According to the restriction conditions, the channel interval r for a single frequency hopping of the low-priority cognitive sending node 1,s Can be set to r 1,s =1, and the channel interval r of the single frequency hopping of the low-priority cognitive receiving node 1,t Can be set to r 1,t = ...

Embodiment 2

[0068] Examples of existing cognitive transmission and reception frequency hopping sequence generation algorithms that do not support node priority

[0069] The existing cognitive transmit and receive frequency hopping sequences are obtained based on a priority-insensitive synchronization frequency hopping sequence generation algorithm. In this algorithm, the number of authorized channels N must be an even number, and each transmit frequency hopping sequence Is the following N 2 Periodic repetition of / 2 element sequence:

[0070] {b i +0modulo N,b i +1 modulo N,…,b i +N-1modulo N,(b i +2)+0 modulo N,(b i +2)+1modulo N,…,(b i +2)+N-1 modulo N,…,(b i +N-2)+0modulo N,(b i +N-2)+1 modulo N,…,(b i +N-2)+N-1 modulo N}, where b i , I∈[1,N / 2], represents the frequency hopping sequence Where the initial channel is located, and satisfies b 1 = B 2 =...=b N / 2 modulo 2.

[0071] At the same time, each received frequency hopping sequence ψ i Is a sequence of N elements {a i modulo N,a i -1mo...

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Abstract

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. The transceiver of each cognitive sending or receiving node in the present invention will perform periodic hopping on all N authorized channels according to a certain frequency hopping sequence, and make full use of idle time under the premise of avoiding interference to authorized user communications. The purpose of authorized spectrum resources. At the beginning of each time slot, each sending or receiving node will first switch its transceiver to a new licensed channel, and then perform real-time spectrum sensing on the licensed channel. Similar to the existing frequency hopping-based cognitive wireless network control information interaction method, the control information interaction method based on frequency hopping and support node priority proposed by the present invention can ensure that cognitive sending and receiving nodes of the same priority Both can realize periodic frequency hopping convergence on all accessible channels.

Description

Technical field [0001] The invention belongs to the field of communication technology, and in particular relates to a communication interaction mechanism design based on frequency hopping for cognitive wireless networks. Background technique [0002] In order to flexibly use the free spectrum resources of the authorized network for communication without interfering with the authorized network communication, the cognitive wireless network needs to have a set of efficient control information interaction mechanism to realize the transmission of spectrum sensing results, including spectrum sensing results, and A large amount of control information such as clock synchronization and communication band reservation. The control information interaction method based on frequency hopping can flexibly and quickly find the communication frequency band (or channel) occupied by unauthorized users by continuously changing the communication frequency band (or channel) for the cognitive node to ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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