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Adjusting method for interference between relay stations based on sub-channel pattern

A relay station, sub-channel technology, applied in radio relay systems, transmission control/equalization, communication between multiple stations, etc., can solve the problems of increased system complexity, poor system compatibility, etc. The effect of compatibility

Inactive Publication Date: 2008-06-04
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Description
  • Claims
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Problems solved by technology

[0004] At present, the interference reduction problem at the RS boundary is mainly solved by: multi-antenna technology, repeated coding and other technologies, which will have a certain effect, but the complexity of the system will increase, and the compatibility with the existing system is relatively poor.

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  • Adjusting method for interference between relay stations based on sub-channel pattern
  • Adjusting method for interference between relay stations based on sub-channel pattern
  • Adjusting method for interference between relay stations based on sub-channel pattern

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Embodiment Construction

[0016] In the present invention, we propose a sub-channel pattern (permutation pattern) based inter-relay station interference adjustment scheme.

[0017] Subchannel pattern (permutation pattern) is one of the main methods to realize multiple access and distinguish subscriber stations in OFDMA system (such as IEEE802.16e). The specific implementation method is as follows figure 2 shown.

[0018] In RelayA, the subchannel pattern of the time-frequency block is as figure 2 As shown in the upper part, the subchannels can be allocated in the following manner: subscriber station MS-A1 uses subchannel I; subscriber station MS-A2 uses subchannel II, and so on.

[0019] In RelayB, the subchannel pattern of the time-frequency block is as figure 2 As shown in the lower part, the subchannels can be allocated in the following way: subscriber station MS-B1 uses subchannel I; subscriber station MS-B2 uses subchannel II, and so on.

[0020] It can be noticed from the figure that the su...

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Abstract

The invention relates to a method for adjusting the interference between relay stations based on the sub-channel pattern, which comprises the steps that: an interfered subscriber station determines whether the present interference level surpasses the threshold value; if the present interference level surpasses the threshold value, the present interference level is informed to an assignment relay station; the assignment relay station informs a base station BS of the interfered subscriber station and the interference level; the base station determines the power adjustment pattern according to the interferential relay station and the assignment relay station; the interferential relay station adjusts the emissive power in a time-frequency block according to the power adjustment pattern that determined by the base station BS. The invention effectively realizes the interference adjustment between the relay stations, and simultaneously can be implemented simply and conveniently without changing the present system terminal and can keep the compatibility with the present system.

Description

technical field [0001] The invention relates to an OFDMA multi-carrier communication system, in particular to a method for adjusting interference between relay stations based on sub-channel patterns. Background technique [0002] In the relay system, each relay station (RS) belonging to the same base station (BS) can transmit to the subscriber stations (MS) within its coverage area at the same time. In order to improve spectrum utilization, each RS usually uses the same time-frequency resource for transmission, that is, the multiplexing factor between each RS is 1. [0003] Since the reuse factor is 1, while improving the spectrum utilization, it will also increase the interference level of the system, especially the interference level in the border area between RSs, such as figure 1 shown. Therefore, additional interference mitigation measures need to be taken for subscriber stations (MS) in this area. [0004] At present, the interference reduction problem at the RS bou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/14H04B7/26H04B7/005
Inventor 郑旭峰
Owner BEIJING SAMSUNG TELECOM R&D CENT