User scheduling method of wireless bidirectional trunk network coding system

A user scheduling and network coding technology, applied in wireless communication, electrical components, etc., can solve problems such as the inability to guarantee high spectral efficiency of relay transmission, the inability to effectively improve system spectral efficiency, and uncertain performance gain, so as to improve system throughput , Guarantee user fairness, facilitate cost and marketization effect

Active Publication Date: 2011-07-27
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It should be noted that there are some problems in the traditional relay technology: (1) Type I relay is mainly used to extend the coverage and cannot effectively improve the system spectrum efficiency; (2) Although Type II relay can provide additional cooperative space diversity gain , but there are many modifications to the existing standard protocol and the performance gain is uncertain; (3) Whether it is a traditional relay or a coordinated relay, it is necessary to provide additional resources for the relay link, and the high spectral efficiency of the relay transmission cannot be guaranteed
However, since the wireless relay network coding system adopts two-way transmission, that is, the base station and multiple users transmit information to the interruption node at the same time, it is necessary to prevent the internal interference of the information (that is, the information sent by the base station to a certain user and the user Interference between information sent to the base station), and to prevent interference between information pairs (that is, interference between different users and between different data streams of the base station), and proportional fair scheduling and The opportunistic scheduling methods do not consider how to prevent the interference within the information pair and the interference between the information pairs at the same time, so they are not suitable for the wireless relay network coding system involved in the present invention

Method used

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  • User scheduling method of wireless bidirectional trunk network coding system
  • User scheduling method of wireless bidirectional trunk network coding system
  • User scheduling method of wireless bidirectional trunk network coding system

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no. 1 example

[0101] This embodiment proposes a user scheduling method for a wireless two-way relay network coding system. Using this method, when the base station or the relay is scheduling users, first the base station and the relay obtain the channel matrix between the base station and the relay through channel estimation, and decompose the singular value of the channel matrix to obtain a unitary matrix U, which is polled with the base station All users to be scheduled in the corresponding cell, more specifically, for each column vector u in the unitary matrix U m , respectively calculate the channel vector h between each user to be scheduled and the relay k with u m The correlation coefficient ρ between k，m , select each user to be scheduled |ρ k，m |The largest user is scheduled to determine at most M users who use the same time-frequency resources to send data to the relay, so as to complete the scheduling, where m is a natural number less than or equal to M, and m is the sequence n...

no. 2 example

[0129] Combine below Figure 4 A second embodiment will be described. Here, only the differences from the first embodiment are emphasized. Unless otherwise specified in this embodiment, all technical means in the first embodiment can be applied to this embodiment. In addition, in this embodiment, the same reference numerals as those in the first embodiment are used for steps that are the same as or similar to those in the first embodiment.

[0130] Step S400:

[0131] The base station or the relay obtains the multi-antenna channel matrix G=[g 1 , g 2 ,..., g M ], however, different from the first embodiment, in this embodiment, no singular value decomposition is performed on the channel matrix G.

[0132] Step S420:

[0133] Poll the kth user in Ω, and calculate the uplink channel vector h between the kth user and the relay by expression (12) k (h k is M×1 dimensional vector) and g m The correlation coefficient ρ k，m ,

[0134] ρ k...

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Abstract

The invention disclose a user scheduling method of a wireless bidirectional trunk network coding system, which relates to one multi-antenna base station, one multi-antenna trunk and multiple single-antenna users. When the base station or the trunk is scheduled, a multi-antenna channel between the base station and the trunk is estimated firstly, then singular value decomposition (SVD) is conductedon the multi-antenna channel between the base station and the trunk so as to obtain unitary matrix, all service users in a cell is polled, related coefficient between the service users and the trunk channel and between the service users and unitary matrix array vector is calculated respectively, and the users with maximum related coefficient absolute value are selected to be scheduled. The methodprevents the interference between the information sent to the user by the base station and information sent to the base station by the user, and also prevents the interference between different usersand between different data streams of the base station, thus greatly improving the system throughput on the premise of guaranteeing the fairness of the users. In addition, the method has low calculating complexity, does not need to increase extra signaling cost, and is suitable for being used in the future wireless bidirectional trunk network coding system.

Description

technical field [0001] The invention relates to a user scheduling method of a wireless two-way relay network coding system, belonging to the technical field of wireless mobile communication relay systems. Background technique [0002] The next-generation broadband cellular mobile communication system (IMT-Advanced) will use traditional wireless relay technology (such as Type I relay, Type I) to expand coverage, and also consider the use of cooperative relay technology (such as Type II relay, Type II) to provide additional space diversity gain, thereby improving the transmission rate and the spectral efficiency of the system. It should be noted that there are some problems in the traditional relay technology: (1) Type I relay is mainly used to extend the coverage and cannot effectively improve the system spectrum efficiency; (2) Although Type II relay can provide additional cooperative space diversity gain , but there are many modifications to the existing standard protocol ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12
Inventor 彭木根张翔李勇丰俊伟王文博
Owner COMBA TELECOM SYST CHINA LTD
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