Space division multiplexing-based encoding method, device and system in cooperative multiple input multiple output (MIMO) communication

A technology of space division multiplexing and encoding method, applied in the field of encoding method, device and system based on space division multiplexing, can solve the problems of wasting wireless resources, inter-user interference, unable to accurately decode signals, etc., to reduce the number of inter-user Effects of interference, avoiding waste, and taking into account interests

Inactive Publication Date: 2011-04-20
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

[0022] Using the existing D-STTD structure to send symbols, cell edge users will receive 8 signals at the same time. For cell edge users with 2 receiving antennas, they cannot accurately decode the signals they want to receive, that is, they are greatly affected. Strong inter-user interference, in order to eliminate the interference, the existing technology adopts increasing the number of antennas at the receiving end or adopting the existing macro-diversity-based antenna selection technology, which greatly wastes wireless resources, and cannot simultaneously consider the user at the center of the cell and the user at the edge of the cell business experience
[0023] Spatial multiplexing plus single-hop antenna (SM+AH, spatial multiplexing+antenna hopping) technology also has the above problems of wasting wireless resources and not considering the service experience of users at the center of the cell and users at the edge of the cell at the same time.

Method used

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  • Space division multiplexing-based encoding method, device and system in cooperative multiple input multiple output (MIMO) communication
  • Space division multiplexing-based encoding method, device and system in cooperative multiple input multiple output (MIMO) communication
  • Space division multiplexing-based encoding method, device and system in cooperative multiple input multiple output (MIMO) communication

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example 1

[0089] This embodiment takes two BS cooperation as an example to introduce. In this example, the BS supports 4 antennas, and the MS supports 2 antennas; each MS moves at a high speed (without special CSI feedback); the application environment is still as follows figure 2 As shown, one MS (MS1) is located at the edge of the cell, which is the cell edge user, and two MSs (MS2 and MS3) are respectively located at the cell center, that is, MS2 is the cell center user of BS1, and MS3 is the cell center user of BS2. Assume that MS1 receives symbols x1, x2, x3, x4; MS2 receives symbol x5; MS3 receives symbol x6. Each BS transmits a D-STTD signal structure, one stream is used for cell-edge MSs, and one stream is used for both intra-cell users (Cell-center MSs) and cell-edge MSs.

[0090] Taking BS1 as an example, use one of the group (2) antennas of BS1 to exclusively serve the cell edge user MS1 of the cell where BS1 is located, and encode the first group of symbols x1 and x2 to be ...

example 2

[0122] In this example, three base stations cooperate to provide services for one cell edge user and three cell center users. Each base station has 4 antennas, users at the edge of the cell have more than 2 antennas, and users at the center of the cell have more than 2 antennas. Suppose cell edge user MS1 receives symbols x1, x2, x3, x4, x5, x6; other 3 cell center users MS2, MS3, MS4 receive symbols x7, x8, x9 respectively.

[0123] Each BS transmits a D-STTD signal structure, one flow is used for cell edge users (Cell-edge MSs), and one flow is used for cell center users (Cell-center MSs) and cell edge users (Cell-edge MSs), according to The encoding structure of each base station of the scheme of the present invention is as follows:

[0124] BS1 transfer structure BS2 Transport Structure

[0125] BS3 Transport Structure

[0126] For the users in the center of the cell, they treat the transmitted signals according to the traditional D-STTD structure, and perform the...

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Abstract

The embodiment of the invention relates to a symbol sending method, a symbol sending device and a symbol sending system in cooperative multiple input multiple output (MIMO) communication in the field of communication. The method comprises the following steps that: a first group of antennae send a first group of symbols to a cell edge user; and a second group of antennae send a second group of symbols to a cell center user and the cell edge user, wherein the second group of symbols comprise symbols sent to the cell center user and symbols sent to the cell edge user by another base station. User interference is reduced effectively, the benefits of the cell center user and the cell edge user are ensured and the waste of a radio resource is avoided effectively.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a coding method, device and system based on space division multiplexing in cooperative multiple input multiple output (MIMO, Multiple Input Multiple Output) communication. Background technique [0002] Downlink Co-MIMO (Downlink Co-MIMO) is a technique for coordinating signal transmission of multiple base stations to mitigate inter-cell interference. In the Co-MIMO system, multiple base stations (BS, Base Station) will cooperate / coordinate to provide communication services for multiple mobile terminals (MS, Mobile Station) at the same time, such as figure 1 shown in . [0003] In a Co-MIMO environment, users are usually divided into two types according to their location in the network and the degree of path loss: cell center users (cell_center users) and cell edge users (cell_edge users). [0004] Since the user in the center of the cell is far away from the neig...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04B7/04H04W52/24
Inventor 张弓龙毅潘璐伽崔颖余浩张顺卿
Owner HUAWEI TECH CO LTD
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