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Precoding method of multi-cast broadcasting service, base station and terminal

A multicast broadcast service and precoding technology, applied in the multicast broadcast service precoding method, base station and terminal field, can solve the problems of user channel quality deterioration, large feedback overhead, etc., to improve user performance, solve performance bottlenecks, Improves spectral efficiency and coverage

Active Publication Date: 2013-11-06
HUAWEI TECH CO LTD
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Problems solved by technology

[0022] In view of the deficiencies in the prior art, the embodiment of the present invention provides a precoding method under the MBS service, a base station and a terminal, to solve the problems of high feedback overhead and improvement of the worst channel quality causing deterioration of other users' channel quality

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  • Precoding method of multi-cast broadcasting service, base station and terminal
  • Precoding method of multi-cast broadcasting service, base station and terminal
  • Precoding method of multi-cast broadcasting service, base station and terminal

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0037] An embodiment of the present invention provides a base station precoding method, see figure 1 ,

[0038] 101. The public threshold of the receiving signal-to-noise ratio of the base station broadcasting MBS;

[0039] 102. Receive codebook-based channel state information fed back by an MBS user whose original signal-to-noise ratio is smaller than the public threshold through a common feedback control channel;

[0040] Here, each MBS user compares its own or...

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Abstract

A precoding method includes: broadcasting a public threshold for signal-to-noise ratio reception of a multicast broadcast service (MBS); receiving codebook-based channel status information fed back via the public feedback control channel by MBS users whose original signal-to-noise ratio is lower than the public threshold; according to the channel status information fed back, constructing precoding vectors which maximize the minimum signal-to-noise ratio reception of MBS users. The present method improves performance for users with worst channel quality without incurring excessive loss of performance for other users, and enhances the frequency spectrum efficiency and the coverage of MBS.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a multicast broadcast service precoding method, a base station and a terminal. Background technique [0002] MBS (Multicast Broadcast Service, Multicast Broadcast Service) is a service corresponding to unicast, and the service transmission of MBS is to transmit data to multiple users at the same time. Since the channel quality of each user varies greatly in an actual system, the service efficiency of MBS is severely limited by the worst user channel quality. An effective way to improve the efficiency of MBS services is to improve the channel quality of limited users by applying multi-antenna precoding technology and utilizing space diversity gain. [0003] Suppose there are K MBS users, the base station is configured with M effective transmit antennas, and each MBS user is configured with N k a receiving antenna. Then the channel parameters of the kth user can be expresse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L1/06H04W4/06H04W88/02H04W88/08
CPCH04B7/0639H04L2001/0093H04L1/0028
Inventor 杜颖钢司宏杰常欣招溢利刘坚能
Owner HUAWEI TECH CO LTD
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