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Method and system for implementing multiple user complexing pre-coding in multi-point coordination transmission

A multi-point coordination and precoding technology, applied in the field of multi-user multiplexing precoding, can solve problems that have not yet existed, and achieve the effect of improving the signal-to-interference-noise ratio

Inactive Publication Date: 2011-05-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no implementation scheme that combines MU-MIMO technology with multi-point coordinated transmission technology

Method used

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  • Method and system for implementing multiple user complexing pre-coding in multi-point coordination transmission
  • Method and system for implementing multiple user complexing pre-coding in multi-point coordination transmission
  • Method and system for implementing multiple user complexing pre-coding in multi-point coordination transmission

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0116] Example 1: A scenario where a cooperative user performs multi-user pairing with a non-cooperative user.

[0117] Combined with the semi-static planning of the system and the channel measurement feedback of user 1 and user 2, the serving cell (cell 1) to which user 1 and user 2 belong determines that user 1 is a cooperative user, and a cooperative set consisting of cell 1, cell 2, and cell 3 is required Coordinated transmission is performed for user 1, and base station 1 is the master base station of the coordinated set. User 2 is a non-cooperative user, and only the serving cell (cell 1) provides transmission. The base stations 1, 2, and 3 in the cooperative set interact with each other through the X2 interface to communicate channel information fed back by their respective service users. Finally, the master base station 1 determines the time-frequency resource block a between user 1 and user 2 according to the principle of orthogonality of paired user channels for mul...

example 2

[0129] Example 2: A scenario where two cooperative users perform pairing.

[0130] Combined with the semi-static planning of the system and the channel measurement feedback of user 1 and user 3, the serving cell (cell 1) to which user 1 belongs determines that user 1 is a cooperative user, and a cooperative set consisting of cell 1, cell 2, and cell 3 needs to perform For coordinated transmission, the serving cell (cell 3) to which user 3 belongs determines that user 3 is a coordinated user, and a coordinated set consisting of cells 1, 2, and 3 is required to perform coordinated transmission for user 3. Therefore, although user 1 and user 3 belong to different serving cells, they belong to the same coordination set.

[0131] Cells 1, 2, and 3 in the coordination set exchange channel information fed back by their service users with each other through the X2 interface, and perform overall resource scheduling. According to the principle of channel orthogonality of paired users, ...

example 3

[0143] Example 3: A scenario where two non-cooperative users perform pairing.

[0144] Combined with the semi-static planning of the system and the channel measurement feedback of users 4 and 5, the serving cell (cell 1) to which they belong determines that user 1 and user 5 are non-cooperative users, so only the serving cell transmits them. Cell 1 does not need to transmit the channel feedback of users 4 and 5 to cells 2 and 3 through the X2 interface, and cell 1 performs resource scheduling for these two users. According to the principle of channel orthogonality of paired users, it is determined that user 4 and user 5 perform multi-user pairing on the time-frequency resource block c. The network structure is as Figure 4 shown.

[0145] If the user directly feeds back the channel response to the serving cell, the channel response from user 4 to cell 1 is The channel responses from user 5 to cell 1 are respectively Cell 1 determines the transmit precoding weights of use...

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Abstract

The invention discloses a method for implementing multi-user complexing pre-coding in multi-point coordination transmission. The method comprises: adopting a combined pre-code, of which multiple cells and multiple users are paired, to implement the multiple user-multiple input multiple output (MU-MIMO) when multi-point coordination transmission is carried out. The invention also discloses a system for implementing the multiple user complexing pre-coding in the multi-point coordination transmission. The system comprises an MU-MIMO implementing unit which is used for implementing MU-MIMO by adopting the combined pre-code, of which multiple cells and multiple users are paired, when multi-point coordination transmission is carried out. When the method and the system provided by the invention are adopted, the MU-MIMO technology is combined with multi-point coordination transmission technology, so the frequency spectrum efficiency of the system and the communication quality of the user are greatly improved.

Description

technical field [0001] The present invention relates to multiple-input multiple-output (MIMO, Multiple-Input Multiple-Output) wireless mobile communication technology, in particular to a method and system for realizing multi-user multiplexing precoding in multi-point coordinated transmission. Background technique [0002] MIMO technology has become a key technology in B3G and 4G mobile communication systems because it can increase system capacity, improve transmission performance, and can be well integrated with other physical layer technologies. [0003] The receiving end of the downlink MIMO system can be single-user MIMO (SU-MIMO, Single-User MIMO) configured with multiple antennas, or multi-user MIMO (MU-MIMO, Multi-User MIMO) configured with one or more antennas. User MIMO). Among them, for MU-MIMO, its base station transmits with multiple users, and the transmissions of each user are independent of each other, but share the same time / frequency resources; for SU-MIMO, ...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04B7/06H04W72/12
CPCH04B7/024H04B7/0452
Inventor 张晨晨姜静朱常青
Owner ZTE CORP
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