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Cooperative non-orthogonal layered multicast multiple access transmission method

A transmission method and non-orthogonal technology, applied in the field of cooperative non-orthogonal hierarchical multicast multiple access transmission, can solve the problems of limited hierarchical multicast performance and lack of physical layer cooperative support, so as to reduce interruption probability and improve reliability. sexual effect

Active Publication Date: 2021-04-13
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current layered multicast mechanisms are mainly performed at the application layer without the coordinated support of the physical layer, thus limiting the performance of layered multicast in wireless systems

Method used

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  • Cooperative non-orthogonal layered multicast multiple access transmission method
  • Cooperative non-orthogonal layered multicast multiple access transmission method
  • Cooperative non-orthogonal layered multicast multiple access transmission method

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Experimental program
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Embodiment 1

[0044] The cooperative non-orthogonal multiple access layered multicast network system model of the present invention is as follows figure 1 As shown, it includes a base station, a group of regular users LU and a group of advanced users HU. In multicast applications such as video services, the original video information is divided into basic streams and enhanced streams, in which the basic stream provides the basic level of video quality, and each enhanced stream can further optimize the video resolution. Therefore, each multicast user can be based on It adaptively decodes the layered streams it receives with respect to the quality of reception of each layered stream. Assume that the HU requires a high information rate, that is, the users in the HU need to decode x 1 signal and x 2 Signal. In other words, users in the HU need to decode both the base stream and the enhancement stream. LU requires a lower information rate, i.e. users in LU only need to decode x 1 informatio...

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Abstract

The invention discloses a cooperative non-orthogonal layered multicast multiple access transmission method. Including: the base station broadcasts superimposed signals, each user uses the chain sequence interference cancellation technology to decode the message; selects the relay, and the relay selection includes two stages. In the first stage, several high-level users who have successfully decoded are selected as potential relays. In the second stage, from all potential relays, the potential relay that makes the worst link gain of the regular users who are not successfully decoded in the first time slot is selected as the relay user; the relay user forwards the superimposed Signal or high-priority signal, the user who failed to decode the first time slot receives the signal forwarded by the relay user, and decodes the signal required by the subset through the chain sequence interference cancellation technology. Utilizing the invention, in wireless multicasting, the best service can be provided for all multicasting users at the same time, and the system interruption probability is reduced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a cooperative non-orthogonal layered multicast multiple access transmission method. Background technique [0002] With the development of the times, system communication technology continues to advance by leaps and bounds. As of 2020, some cities in my country have successfully deployed 5G communication networks. Facing the future, the communications industry needs a multiple access technology that can achieve low latency, high reliability, large-scale connectivity, better fairness, and high throughput. Therefore, non-orthogonal multiple access technology should be used And born. So far, several non-orthogonal multiple access techniques have been proposed in academia and industry. These multiple access techniques are based on the same idea of ​​serving more than one user in each orthogonal resource block. [0003] When electromagnetic waves are transmitted in fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/06H04L29/06H04L12/18H04N21/6405
CPCH04W4/06H04L12/18H04N21/6405H04L65/611
Inventor 张璞
Owner XIDIAN UNIV