Data receiving and transmitting method, device and system applied to MBMS service

A data transmission method and service data technology, applied in the field of communication, can solve the problem that the transmit diversity scheme cannot obtain space diversity gain and coding gain, etc., and achieve the effect of simple decoding process and high space diversity gain

Inactive Publication Date: 2010-03-17
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology

[0026] Embodiments of the present invention provide a data sending method, a receiving method, and a data sending and receiving system applied to MBMS services, to solve the problem that the transmit diversity schemes in the prior art cannot obtain complete space diversity gain and coding gain or need to be in a specific The problem that the full space diversity gain can only be obtained under the condition of

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  • Data receiving and transmitting method, device and system applied to MBMS service
  • Data receiving and transmitting method, device and system applied to MBMS service
  • Data receiving and transmitting method, device and system applied to MBMS service

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Embodiment Construction

[0057] The embodiment of the present invention is based on 4Tx MDC (that is, MDC space-time coding with 4 antennas at the transmitting end, where Minimum Decoding Complexity, minimum complexity coding, is the name of a space-time coding scheme, which can achieve a full rate of 1 when 4 antennas Diversity effect) The space-time coding model formulates the MBMS distribution diversity scheme. Before the BSs of the three groups of cells send MBMS data streams to the users, they respectively perform space-time coding on the data according to a branch in the 4Tx MDC space-time coding model, so that the space-time coding The last three data streams constitute an encoding matrix with a rate of 1 and a diversity of 3. Using it as an MBMS transmission diversity scheme can ensure that the diversity gain of order 3 can be realized in any channel coding rate and channel environment, and at the same time obtain a certain extra coding gain, so that the system performance can be significantly ...

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Abstract

The invention discloses a data receiving and transmitting method, a transceiver and a system applied to an MBMS service. The data transmitting method applied to a broadcast / multicast MBMS service comprises the following steps that: all cells sending the same MBMS service data are divided into three groups; a base station of each group of the cells performs constellation rotation of a modulation symbol of the MBMS service data to be transmitted and performs space-time coding on the data after the constellation rotation according to a branch in an MDC model, and the branches used by the base stations of the same group of the cells are same and the branches used by the base stations of different groups of the cells are different; the base station of each group of the cells modulates the dataafter the space-time coding into radio-frequency signals and transmits the radio-frequency signals. The data receiving and transmitting method, the transceiver and the system can improve the space diversity gain and the coding gain of the signals.

Description

technical field [0001] The present invention relates to the MBMS technology in the communication field, in particular to a data sending method, a data receiving method, a transmitting device, a receiving device, and a system applied to MBMS services. Background technique [0002] MBMS (Multimedia Broadcast / Multimedia Service, multimedia broadcast / multicast service, or multimedia broadcast / multicast service) aims to provide a flexible and effective mechanism for broadcast and multicast services. Multiple base stations (Base Station, BS) A user equipment (UE) sends data covering the same information, and the same UE can receive signals from its own cell and a neighboring cell BS. If the BSs in all cells send the same signal, such as the MBMSFN scheme, the UE receives an enhanced signal-to-noise ratio, but the system cannot effectively obtain space diversity gain. If the cells whose broadcast information can be received by the same UE are grouped, each group processes the broa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08H04L1/06H04W4/06
Inventor 韩璐赵慧邵兰王文博
Owner CHINA MOBILE COMM GRP CO LTD
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