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Multi-user, multi-input and multi-output pairing method and device

A user pairing, multi-input technology, applied in the field of multi-user multi-input multi-output pairing and devices, can solve the problem of ignoring the consideration of the imaginary part and the like

Inactive Publication Date: 2014-07-16
张达
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0030] The disadvantage of this algorithm is that: on the one hand, the f 12 = f 21 * , then f 12 +f 21 Small, it can only ensure that the real part of the two conjugate complex numbers is the smallest, ignoring the consideration of its imaginary part
On the other hand, the algorithm only

Method used

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  • Multi-user, multi-input and multi-output pairing method and device
  • Multi-user, multi-input and multi-output pairing method and device
  • Multi-user, multi-input and multi-output pairing method and device

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Experimental program
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Embodiment 1

[0091] figure 1 It is an overall flowchart of the pairing method in this embodiment, including:

[0092] Step 10, when the base station wants to use the multi-user V-MIMO mode, first select the first user in the V-MIMO mode from the users who have been allocated resources;

[0093] The base station can determine whether to use the V-MIMO mode by detecting the system load. When the system service is not busy, that is, when the system can meet user service requests through time domain and frequency domain resource scheduling, the multi-user V-MIMO mode is not used. Otherwise, use the V-MIMO mode for some users to solve or alleviate the problem of excessive load.

[0094] When selecting the first user, this can be done in the following sub-steps:

[0095] The first step is to use scheduling algorithms such as round robin or proportional to calculate the service priority of users requesting services, and allocate time-frequency resources to users with high priority;

[0096] I...

Embodiment 2

[0128] This embodiment differs from Embodiment 1 in the manner of determining the final paired user after the primary user is selected when threshold judgment is performed in the pairing process, and only the difference will be described below.

[0129] This embodiment adopts a judgment standard that combines the wide judgment standard and the strict judgment standard:

[0130] As mentioned above, the wide decision criterion means that for user g m , if the following conditions are met, it can be used as user k l Primary user for :

[0131] ξ ‾ k l g m = 1 N Σ n = 1 N ξ n , k l ...

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Abstract

A pairing method for Multi-user Multi-input Multi-output is applied in communications systems which can use multi-user Virtual Multi-Input Multi-Output (V-MIMO) mode. The method includes: during V-MIMO mode pairing, according to the following pairing judgement manner, a base station judges whether a first user to which resources have been allocated can be paired with a candidate user: firstly, calculating the pairing factor between the first user and the candidate user on the bandwidth occupied by the first user, only when the pairing factor is less than or equal to the set pairing threshold, making the candidate user be an original selected user paired with the first user, wherein: the pairing factor is equal to the average value of the pairing factors on the all single carriers which are included on the bandwidth occupied by the first user. A pairing device for Multi-user Multi-input Multi-output is also provided in the present invention. The present invention jointly considers the whole influence of the real and imaginary parts of the cross correlation value and reduces the negative influence of the pairing mode on the system throughput to a certain extent.

Description

technical field [0001] The invention relates to a multiuser multi-input multi-output (Mu-MIMO, Multiuser Multi-Input Multi-Output) pairing method in the field of mobile communication. Background technique [0002] In order to realize high-speed data transmission and improve system throughput, MIMO technology, which can make full use of space resources, is introduced in the 3G LTE standard. [0003] In order to effectively solve the problem of overloading and enable more users to access the system at the same time, LTE proposes a way for multiple uplink users to access the system at the same time at the same frequency, that is, virtual multiple-input multiple-output (V-MIMO, Virtual Multi -Input Multi-Output) mode, which increases the freedom of resource allocation through spatial multi-user transmission, so that the system can obtain spatial multi-user multiplexing gain. [0004] V-MIMO is actually a Space Division Multiple Access (SDMA, Space Division Multiple Access) meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04W72/12H04L1/06
CPCH04B7/0452H04B7/024
Inventor 魏民李晓辉李峰赵楠田开波牛军涛彭爱华薛鑫徐鑫昌任敏
Owner 张达
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