Channel state judgment method based on frequency hopping and time hopping pattern under self-organizing network

A self-organizing network, time-hopping pattern technology, applied in network topology, network traffic/resource management, wireless communication, etc. The effect of both performance

Active Publication Date: 2020-08-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is mainly to solve the problem of reducing algorithm complexity while reducing delay and improving throughput

Method used

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  • Channel state judgment method based on frequency hopping and time hopping pattern under self-organizing network
  • Channel state judgment method based on frequency hopping and time hopping pattern under self-organizing network
  • Channel state judgment method based on frequency hopping and time hopping pattern under self-organizing network

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Experimental program
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specific Embodiment approach 1

[0056] Specific implementation mode one: combine figure 1 To describe this embodiment,

[0057] This embodiment is a channel state judgment method based on frequency hopping and time hopping patterns in an ad hoc network, including the following steps:

[0058] The fully connected self-organizing network includes N nodes, N nodes are randomly distributed and have equal status, and each node generates k priority services in proportion;

[0059] For fully connected ad hoc networks, the physical layer uses frequency hopping and time hopping technology for transmission, providing a total of m frequency points; based on non-overlapping frequency hopping and time hopping patterns, q patterns are fixedly assigned to each node in advance, and the transmission and timing of nodes Receiving is based on the pattern, which can realize multiple receiving for one send;

[0060] Each pattern corresponds to a time-frequency matrix, and the split physical pulse is mapped to the time-frequenc...

specific Embodiment approach 2

[0064] This embodiment is a channel state judgment method based on frequency-hopping and time-hopping patterns under an ad hoc network, and the process of mapping the split physical pulses to a time-frequency matrix includes the following steps:

[0065] For a data packet, the time required for complete transmission is T p , split it into n durations of t p The physical pulse, then the sending duty cycle is When sending, the node corresponds n physical pulses to the time-frequency matrix one by one, and performs double hopping of frequency and time to enhance the anti-interference performance of the system, reduce the collision probability and delay, and improve throughput.

[0066] The generation process of the time-frequency matrix is ​​as follows:

[0067] Assuming that the number of frequency points m is large enough, based on the construction method of the truncated prime frequency hopping sequence, taking n+1≤p≤m+1, sufficient non-overlapping frequency-hopping and tim...

specific Embodiment approach 3

[0075] Specific implementation mode three: combination figure 2 To describe this embodiment,

[0076] This embodiment is a channel state judgment method based on frequency hopping and time hopping patterns in an ad hoc network. The specific process of channel load statistics is as follows:

[0077] Reasonably design the parameters to generate enough total number of frequency-hopping and time-hopping patterns to ensure that each node is allocated to mutually orthogonal q patterns. Since pulses are sent in patterns, the load statistics are also in units of patterns. The existing channel load statistics methods are generally divided into two types, one is to count the number of data packets arriving at the upper layer or broadcast information through the network layer, and the other is to perform statistics on each frequency point at the physical layer and obtain the average value as the final result. Statistics. However, in the case of frequency-hopping and time-hopping patt...

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Abstract

The invention discloses a channel state judgment method based on a frequency hopping and time hopping pattern under a self-organizing network, and belongs to the field of wireless network communication. The invention aims to solve the problem of reducing the algorithm complexity while reducing the time delay and improving the throughput. Aiming at the fully-connected self-organizing network, a physical layer adopts a frequency hopping and time hopping technology for sending, and m frequency points are provided in total; based on non-overlapping frequency hopping and time hopping patterns, q patterns are fixedly distributed to each node in advance, and the pattern is taken as a unit in sending and receiving of the nodes; wherein each pattern corresponds to one time-frequency matrix, the split physical pulse is mapped into the time-frequency matrix to obtain a sending form of the physical pulse, and determining whether to send is performed according to a channel load state: when the channel load statistical value is smaller than a priority threshold, the channel state is a light load state, and sending can be carried out; otherwise, the channel is overloaded, and the node withdraws.The method is mainly used for judging the channel state.

Description

technical field [0001] The invention belongs to the field of wireless network communication, and relates to a method for judging channel state under ad hoc networks. Background technique [0002] With the advent of the Internet of Everything era, the amount of wireless data is increasing rapidly, and the requirements for data transmission of different services are also increasing. In environments with high latency requirements such as battlefields and disaster relief sites, self-organizing networks have attracted widespread attention due to their huge advantages such as easy deployment, no dependencies, and strong flexibility, especially in terms of network access control, serving different services of nodes Quality and average end-to-end latency are guaranteed. However, traditional access control methods such as the distribution protocol TDMA and random access control CSMA / CA cannot meet the delay requirements and the service quality of different business priorities. Stat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/02H04W84/18H04B1/713
CPCH04W28/0284H04W84/18H04B1/713Y02D30/70
Inventor 马永奎刘依婷赵洪林张佳岩高玉龙
Owner HARBIN INST OF TECH
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