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Cache-Based SISO X Network Latency CSIT Disturbance Alignment Method

A technology of interference alignment and network delay, applied in the field of communication, can solve the problems of small signal transmission space, no consideration of caching and compression of interference signal space, and difficulty in compressing interference signal space

Active Publication Date: 2020-11-03
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] According to the above description, although there is currently a delayed CSIT interference alignment method for SISO X networks, this method does not consider the effect of caching and compressing the interference signal space when constructing high-order signals, because in SISO X networks, each base station and user have Only one antenna is configured, the space for signal transmission is very small, and the interference signal space is difficult to compress. Therefore, the effect of caching on compressing the interference space can greatly improve the degree of freedom of the SISO X network
At the same time, since the existing scheme only considers a fixed number of signals in the transmission process, it is only applicable to a single scenario

Method used

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  • Cache-Based SISO X Network Latency CSIT Disturbance Alignment Method

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Embodiment Construction

[0091] Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail:

[0092] refer to figure 1 , the present invention comprises the following steps:

[0093] Step 1) Build a single-input single-output SISO X network system:

[0094] Construction includes database, base station Tx i and user S K The single-input single-output SISO X network system of , i represents the serial number of the base station, i={1,2}, S K ={Rx 1 ,Rx 2 ,Rx 3},Rx j Represents the jth user, j∈{1,2,3}, K represents the total number of users, K=3, where:

[0095] The database is used to store files W={W 1 ,W 2 ,W 3}, W n , n∈{1,2,3} means the nth file containing F data packets, each data packet contains B symbols, F=6, B=3;

[0096] The base station Tx i , for W n The 3 packets contained in the cache are sent to S K Send the request file to obtain the channel state information CSIT delayed by one time slot;

[0097] The use...

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Abstract

The invention provides an SISO X network delay CSIT interference alignment method based on cache. The objective of the invention is to improve the degree of freedom of an SISO X network system. The implementation steps are as follows: the system parameters of SISO X networks of a plurality of users of the two base stations are set, cache contents of the base station and the user are determined according to the system parameters; therefore, the base station constructs a second-order signal by utilizing the cached content; afterwards, the base station designs a transmission policy, the sending strategy is divided into a plurality of stages. Different sending modes are flexibly selected according to the number of signals, high-order signals are sent to different numbers of users in each stage, the users are grouped, the high-order signals are sent to each group of users respectively, and higher-order signals are generated on a base station and sent in the next stage through delayed CSIT.And in the last stage, the base station sends the highest-order signal, so that the user eliminates the overlapped interference space, and the interference alignment of the delayed CSIT is realized.

Description

technical field [0001] The invention belongs to the technical field of communications, and relates to a delay CSIT interference alignment method, in particular to a buffer-based SISO X network delay CSIT interference alignment method, which can be used to eliminate interference in a SISO X network including two base stations and multiple users. Background technique [0002] With the development of multimedia services, the transmission rate requirements of wireless networks are getting higher and higher. Interference management is an important challenge in wireless networks since interference is the main factor limiting the transmission rate. [0003] Aiming at the interference problem, V.R. Cadambe and S.A. Jafar published a paper called Interference alignment and degrees of freedom of the K-user interference channel on IEEE Transactions on Information Theory in 2008, and proposed an interference management method for interference alignment. The main idea of ​​interference ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J11/00
CPCH04J11/0026
Inventor 刘伟张春宇
Owner XIDIAN UNIV