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A Time Division Multiplexing Channel Time Slot Division Method

A technology of time division multiplexing and time slot division, which is applied in the field of network communication, can solve problems such as difficult to obtain perception effects, and achieve the effects of improving detection efficiency and simplifying transmission control algorithms

Inactive Publication Date: 2017-12-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering the randomness and burstiness of PU traffic, it is difficult to achieve a better perception effect simply by relying on the perception ability of the SU
[0009] However, the existing literature lacks the practice of using optimized PU traffic allocation to improve SU perception effect.

Method used

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  • A Time Division Multiplexing Channel Time Slot Division Method
  • A Time Division Multiplexing Channel Time Slot Division Method
  • A Time Division Multiplexing Channel Time Slot Division Method

Examples

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Embodiment

[0052] Such as figure 1 As shown, a time division multiplexing channel time slot division method includes the following steps:

[0053] S1 assumes that the available bandwidth of the current channel is W=3Mbps, and the duration of the system's time frame (Time-frame) is T F = 1 second, the mini-slot duration δ is determined according to the following formula:

[0054] δ=T F / 2 M = 1 / 2 M ,

[0055] According to the processing capability of the wireless cognitive network and the minimum resolvable traffic of the PU, this embodiment selects M=8, then:

[0056] δ=1 / 2 M ≈3.9ms.

[0057] S2 takes the current available time frame T in units of δ F =1 second is divided into N mini-slots:

[0058]

[0059] All mini-slots form a set S:

[0060] S={τ i |T(τ i )=δ, 0≤i<256, i∈Z},

[0061] where T(τ i ) is to obtain τ i function of duration.

[0062] S3 without loss of generality, choose the mini-slot τ 0 as public control slot β CCC .Then according to the 2 times of t...

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Abstract

The invention discloses a time division multiplexing channel time slot partitioning method. The time division multiplexing channel time slot partitioning method includes the steps that the duration of a tiny time slot is determined according to the handling capacity of a cognitive radio network and the minimum distinguishable flow of a master user, and the whole time frame is divided into a tiny time slot set; the tiny time slot set is grouped, and a time slot set is obtained; the flow of the master user is distributed within time slots according to an algorithm, so that the time slots are completely occupied or idle. By means of the time division multiplexing channel time slot partitioning method, distribution of the flow of the master user and time slot occupation can be standardized, the time slots are prevented from being partially occupied, detection on the time slot state by a secondary user in the cognitive radio network is simplified, efficiency of detection on the time slot state is improved, and the degree of transmission and control complexity is decreased for the secondary user.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a time division multiplexing channel time slot division method. Background technique [0002] With the rapid growth of demand for wireless communication services, the available spectrum resources are becoming increasingly scarce, more and more users, and many emerging wireless access technologies are trying to use those limited and increasingly crowded frequency bands ; In contrast, the actual spectrum utilization rate of most of the licensed frequency bands in the world is very low. [0003] In order to solve the above problems, cognitive radio technology came into being. The core of this technology is to realize the dynamic use of frequency bands that have been fixedly allocated to licensed users and other idle frequency bands to improve the utilization of existing spectrum resources through the perception of the wireless environment. . Cognitive Radio Networks (CRN) is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14
Inventor 黄松郑心炜
Owner SOUTH CHINA UNIV OF TECH
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