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Method and device for coordinated multi-point transmission

A technology of multi-point coordination and transmission method, applied in the field of communication, can solve the problem that multiple cells cannot schedule coordinated users, and achieve the effect of achieving forward compatibility and improving system throughput and spectrum efficiency.

Inactive Publication Date: 2015-08-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In view of this, the main purpose of the present invention is to provide a method and device for coordinated multi-point transmission, which is used to solve the problem that multiple cells cannot schedule coordinated users on a unified resource during joint processing of coordinated multi-point transmission. Purpose, technical scheme of the present invention is achieved like this:

Method used

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  • Method and device for coordinated multi-point transmission
  • Method and device for coordinated multi-point transmission
  • Method and device for coordinated multi-point transmission

Examples

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example 1

[0071] In this embodiment, the special unicast time unit is an MBSFN subframe, and a fixed number of OFDM symbols are configured for the PDCCH in the MBSFN subframe, or reconfigured on the basis of the number of OFDM symbols configured for the PDCCH in the MBSFN subframe in R8 A fixed number of OFDM symbols are used for PDCCH mapping. The manner of configuring OFDM symbols for the PDCCH in the MBSFN subframe adopts a static or semi-static configuration manner.

[0072] Such as figure 1 As shown, the serving cell of users 1 and 2 is cell 1, the serving cell of user 3 is cell 2, and the serving cell of user 4 is cell 3. User 1 is the second type of user, and cells 1, 2, and 3 form a cooperative set for joint processing. Users 2, 3, and 4 are all users of the first type, and are non-cooperative users in the first type of users.

[0073] For the first type of users 2, 3, and 4, they are independently scheduled by the serving cells to which they belong. For the second type of u...

example 2

[0079] In this embodiment, the special unicast time unit is an MBSFN subframe. The manner of configuring OFDM symbols for the PDCCH in the MBSFN subframe adopts a static or semi-static configuration manner.

[0080] Such as Figure 4As shown, the serving cell of users 1 and 4 is cell 1, the serving cell of user 2 is cell 2, and the serving cell of user 3 is cell 3. User 1 is the second type of user, and cells 1, 2, and 3 form a cooperative set for joint processing. User 2 is a first-type user, and is a CS / CB cooperative user among the first-type users, and is coordinated and scheduled by cells 2 and 3 . Users 3 and 4 are R8 users in the first type of users, that is, non-cooperative users.

[0081] For the second type of user 1, a cooperative set including cells 1, 2, and 3 performs joint scheduling and joint transmission. For the first type of user 2, joint scheduling is performed by the cooperative set including cell 2 and cell 3, and the serving cell (cell 2) transmits i...

example 3

[0086] Such as Figure 5 As shown, the serving cell of users 1 and 2 is cell 1, the serving cell of user 3 is cell 2, and the serving cell of user 4 is cell 3. There is no second type of user in the system, user 1 is a CS / CB cooperative user in the first type of user, and the serving cell (cell 1), cell 2, and cell 3 form a cooperative set to coordinate scheduling. Users 2, 3, and 4 are all R8 users in the first type of users, that is, non-cooperative users.

[0087] Because there is no second type of user, the MBSFN subframe in this system does not need to carry joint processing data, and is only used to transmit MBMS services.

[0088] For the first type of user 1, the cooperative set including cells 1, 2, and 3 performs joint scheduling, and cell 1 performs independent transmission and joint transmission. For the first type of users 2, 3, and 4, they are independently scheduled and transmitted by their respective serving cells.

[0089] The subframe configuration of the ...

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Abstract

The invention discloses a multi-point coordinated transmission method and device, which are used to solve the problem that multiple cells cannot schedule coordinated users on a unified resource during joint processing of multi-point coordinated transmission. In the present invention, for the second type of users whose data is transmitted jointly by multiple nodes, multiple nodes form a cooperative set to perform data transmission for them in a special unicast time unit; each node in the same coordinated set adopts the same configuration method in the The PDCCH is configured on the special unicast time unit; in the special unicast time unit, the CSI-RS in the coordinated set is designed orthogonally, and on the resource unit that conflicts with the CSI-RS of the neighboring cell, the data Punch holes or leave data alone. Through the present invention, joint processing can be performed among multiple small cells, the cooperative combination gain can be obtained, and the system throughput and spectrum efficiency can be improved.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a method and device for coordinated multi-point transmission. Background technique [0002] With the introduction of Long-Term Evolution Advanced (LTE-A) requirements, people pay more and more attention to the average spectral efficiency of the cell and the spectral efficiency of the cell edge. In comparison, the spectral efficiency of the cell edge is the most concerned. This is mainly because the uplink and downlink of the LTE-A system is a frequency division system based on Orthogonal Frequency Division Multiplexing (OFDM) (or some variation of OFDM). Unlike traditional wireless communication systems that use CDMA (Code-Division Multiple Access, CDMA) as the basic multiple access multiplexing method, the LTE-A system has no processing gain. Because the cell is completely frequency-division orthogonal, there is almost no interference problem, but the interference han...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/16H04W72/04
Inventor 张晨晨孙云锋姜静郭森宝
Owner ZTE CORP
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