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Resource management method in SVC multicast based on NOMA in heterogeneous wireless network

A heterogeneous wireless network and resource management technology, applied in the field of scalable video multicast, can solve problems such as limiting spectrum utilization, and achieve the effects of improving received video quality, improving resource utilization, and increasing PSNR

Active Publication Date: 2021-02-12
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since different video layers use orthogonal frequency resources for transmission, spectrum utilization is limited to a certain extent

Method used

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  • Resource management method in SVC multicast based on NOMA in heterogeneous wireless network
  • Resource management method in SVC multicast based on NOMA in heterogeneous wireless network
  • Resource management method in SVC multicast based on NOMA in heterogeneous wireless network

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Embodiment Construction

[0020] The present invention is described below in conjunction with specific embodiment, wherein:

[0021] The first section describes the system model.

[0022] The second part describes the NOMA-based SVC video multicast mechanism in the heterogeneous wireless network scenario proposed by this scheme and raises questions.

[0023] The third part decouples the problem into two sub-problems and designs a loop algorithm and a dynamic programming algorithm to solve it.

[0024] Section IV simulates and evaluates the proposed scheme.

[0025] Finally, the invention is summarized.

[0026] 1 System model

[0027] 1.1 Resource Management Framework

[0028] This example figure 1 As shown in , consider a two-layer heterogeneous wireless network consisting of a macro base station and several small base stations.

[0029] A multicast group within the respective coverage areas of the macro base station and the small base station. The controller (controller) masters all user infor...

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Abstract

A resource management method in SVC multicast based on NOMA in a heterogeneous wireless network is characterized in that the resource management is joint resource management including wireless spectrum allocation and transmitting power division, a joint resource management problem is decomposed into sub-problems, then the sub-problems are solved respectively. The method comprises the following steps: 1) converting a joint resource management problem into a mixed integer nonlinear programming problem, and decoupling the mixed integer nonlinear programming problem P0 into two sub-problems: a multicast group internal transmitting power division problem P1; inter-base station spectrum resource segmentation and multi-group spectrum resource allocation problem P2 in the base station; 2) solvingthe problem P1, solving all possible power distribution schemes, wherein the group with the highest overall video quality is the optimal solution; and 3) solving the problem P2, modeling the spectrumresource segmentation between the base stations and the resource allocation problem between the multicast groups into a knapsack problem, and solving the knapsack problem.

Description

technical field [0001] The invention belongs to the technical field of computers, in particular to a scalable video multicast method based on non-orthogonal multiple access in a heterogeneous wireless network. Background technique [0002] Video service has become the mainstream service of wireless communication, and the increasing video traffic has exacerbated the shortage of wireless spectrum resources. Multicast technology is one of the effective technologies to improve spectrum utilization [1] . Many user equipments (UEs) usually request the same video content, so these UEs can use the same frequency resource [2] . However, since the multicast user equipment needs to correctly decode the received video, the user equipment with the worst channel condition becomes the bottleneck restricting the increase of the multicast rate. [3] . Applying Scalable Video Coding (Scalable Video Coding, SVC) to wireless video multicast can alleviate the performance bottleneck caused by...

Claims

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Application Information

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IPC IPC(8): H04N19/30H04N21/6405H04W72/00H04W72/04H04W72/08
CPCH04N19/30H04N21/6405H04W72/0453H04W72/0473H04W72/543H04W72/30H04W72/542
Inventor 沈航吉晓祥白光伟
Owner NANJING UNIV OF TECH
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