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Data transmitting method and base station control system

A data transmission method and base station control technology, applied in diversity/multi-antenna systems, space transmit diversity, advanced technology, etc., can solve the problem of high power control requirements, achieve low power control requirements, be easy to implement, and improve signal detection performance Effect

Inactive Publication Date: 2009-11-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the embodiments of the present invention is to provide a data transmission method and a base station control system to solve the problem in the prior art that the requirements for power control are particularly high when transmission diversity or multiplexing is used between different cells

Method used

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  • Data transmitting method and base station control system

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Embodiment 1

[0027] Embodiment 1: This embodiment is a data transmission method in single-user MIMO mode. see figure 2 , base station A (BS A) and base station B (BS B) are two adjacent base stations, each equipped with two antennas, respectively A1A2 and B1B2, first, base station A and base station B with multiple antennas determine the data to be sent by each antenna and transmission mode, and then on the same time-frequency resource, respectively transmit data s1 and s2 to the terminal MS in the form of diversity Alamouti, that is, at the first moment, both antennas A1 and B1 transmit s1, antennas A2 and B2 both transmit s2, and at the second At this time, antennas A1 and B1 both transmit -s2*, and antennas A2 and B2 both transmit s1*. If base station A is the main serving base station, the terminal does not need to distinguish the signals from base station B. From the perspective of the terminal, all signals come from base station A. Here, base station B copies and transmits all sign...

Embodiment 2

[0028] Embodiment 2: This embodiment is a data transmission method in single-user MIMO mode. still refer to figure 2 , base station A and base station B are two adjacent base stations, each equipped with two antennas, namely A1A2 and B1B2, first, base station A and base station B with multiple antennas determine the data to be transmitted by each antenna and the transmission method, and then at the same time Each frequency resource transmits s1 and s2 to the terminal MS in a multiplexing manner, that is, at the same time and on the same frequency, antennas A1 and B1 both transmit s1, and antennas A2 and B2 transmit s2 to the terminal MS. Similarly, if base station A is set as the main serving base station, the terminal does not need to distinguish the signals from base station B. From the perspective of the terminal, all signals come from base station A. Here, base station B copies and transmits all signals from base station A to base station A. Because After going through d...

Embodiment 3

[0029] Embodiment 3: This embodiment is a data transmission method in multi-user MIMO mode, that is, there are two or more user terminals, two are used as an example here, and the user terminals all belong to the same transmission group. see image 3 , base station A and base station B are two adjacent base stations, and are equipped with two antennas respectively, namely A1A2 and B1B2. First, base station A and base station B with multiple antennas determine the data to be transmitted by each antenna and the transmission mode, and then use Send data s1 and s2 to terminals MS1 and MS2 in the way of space division multiple access (SDMA), that is, in base station A, s1 is mapped to A1A2 through the precoding vector or matrix corresponding to MS1, and s2 is mapped to the precoding vector or matrix corresponding to MS2 to A1A2, A1A2 sends the combined signal containing s1 and s2 to MS 1 and MS2 via channels Ha1 and Ha2, and in base station B, s1 is mapped to B1B2, s2 is mapped to...

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Abstract

The embodiment of the invention discloses a data transmitting method and a base station control system. The data transmitting method comprises the following steps: adjacent base stations with multiple antennas determine data to be transmitted by each antenna and a transmitting mode; and at least one antenna of the adjacent base stations on the same time-frequency resource transmits the same data to a user terminal in the same mode. The technical scheme of the embodiment of the invention solves the problem that different cells adopt transmit diversity or multiplex and have particularly high requirement on power control in the prior art, has low requirement on the power control of each base station and is easy to implement, and moreover, the user terminal obtains multi-path gaining and improves the signal detection performance.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a data sending method and a corresponding base station control system. Background technique [0002] The application of MIMO (Multi-Input Multi-Output) technology in wireless communication systems has attracted more and more attention. Whether it is from the perspective of increasing system capacity or improving system performance, MIMO has its irreplaceable Superiority. In OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing), the application of MIMO also effectively increases the throughput of the system. MIMO is mainly divided into two categories, one is space diversity technology aimed at maximizing diversity gain, and the other is space division multiplexing technology aimed at maximizing data rate. According to the number of supported users, it can be divided into single-user MIMO (SU-MIMO) and multi-user MIMO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04B7/04
CPCY02D30/70
Inventor 杜颖钢刘晟
Owner HUAWEI TECH CO LTD
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