Interference elimination method of multi-cell base station cooperation

A technology of base station cooperation and interference cancellation, applied in wireless local area network, system and standard fields, can solve problems such as engineering realization problems

Inactive Publication Date: 2011-08-31
BEIJING UNIV OF TECH
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  • Claims
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Problems solved by technology

However, CoMP needs to exchange signals between the base stations participating in the cooperation, which requires a very high transmission rate between the base stations, and the joint processing between the base stations also requires high synchronization accuracy, so there are still difficulties in engineering implementation.

Method used

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Embodiment Construction

[0018] The following is an example of a two-cell communication system. In the two-cell communication system, each cell contains a base station, such as figure 2 shown. The user terminal UE1 communicates with the base station NodeB1 belonging to the cell 1, and the user terminal UE2 communicates with the base station NodeB2 belonging to the cell 2. At the same time, UE1 transmitting signal x1 will cause interference to base station BS2 of cell 2, and UE2 transmitting signal x2 will cause interference to base station BS1 of cell 1.

[0019] Specific steps are as follows:

[0020] Step 1: User UE1 belonging to cell 1 transmits a pilot signal to base station NodeB1.

[0021] Step 2: The neighboring base station NodeB2 of the base station NodeB1 measures the pilot signal, if it can receive the pilot signal transmitted by the UE1, it is selected as the disturbed base station.

[0022] Step 3: the target base station NodeB1 and the disturbed base station NodeB2 respectively calcu...

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Abstract

The invention provides an interference elimination method of multi-cell base station cooperation, belonging to the wireless information transmission field. When a user terminal located in the edge of the cell communicates with the target service base station thereof, the terminal causes interference to the base stations of the adjacent cells. In the invention, the service base station terminal is used to detect the user signal, and transmit the information bit to the interfered base station after demodulation and coding; and at the interfered base station terminal, the interference is rebuilt in accordance with the received user information bit flow, and is deleted from the received signal, after that, the information is recovered. Compared to the general base station cooperation method, by the interference elimination method of the invention, the transmission rate requirement between the cooperative base stations is reduced, and the system capacity is improved.

Description

technical field [0001] The invention belongs to the field of wireless information transmission, in particular to systems and standards such as wireless local area network, broadband wireless access, mobile communication, and terrestrial digital television broadcasting using multi-antenna technology. Background technique [0002] With the gradual integration of wireless networks, multimedia technologies and the Internet, people have higher and higher requirements for the type and quality of wireless communication services. In order to meet the requirements of wireless multimedia and high-speed data transmission, it is necessary to develop a new generation of wireless communication systems, such as 3G, LTE-Advanced, etc. [0003] The current 3G and LTE-Advanced systems adopt CDMA and OFDM technologies respectively, and can realize co-frequency networking. They enable users' information in a cell to be carried on mutually orthogonal spreading codes or orthogonal subcarriers, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04L1/00
Inventor 黎海涛
Owner BEIJING UNIV OF TECH
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