Method for receiving group broadcasting business data by mobile station in radio network

Abstract

A method of receiving multicast ¿C broadcast service data by mobile station in radio network includes setting up fixed mapping relation of index number on modulation and coding mode to coding modulation mode in multicast ¿C broadcast service resource MBS ZONE, obtaining index number of said mode in MBS ZONE and service resource occupied by MBS connection by mobile station, receiving MBS service data by mobile station according service resource occupied by MBS connection and obtaining modulation coding mode corresponding to index number according to fixed mapping relation sought out as per index number for analyzing MBS service data.

Description

technical field [0001] The present invention relates to the multicast broadcasting technology in the wireless network, in particular to a method for receiving multicast broadcast service data by a mobile station in the wireless network. Background technique [0002] The IEEE 802.16 developed by the IEEE (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers) defines a wireless metropolitan area network standard for fixed broadband wireless access (BWA, Broad Wireless Access). The standard defines different physical layer technologies for different frequency bands, and its application scope is mainly for residential, small office / home office (SOHO), remote workers, and SME (small and medium enterprise) markets. [0003] IEEE 802.16 can support a very unfavorable user environment, can cope with the application environment that may have hundreds or thousands of users on each channel, and supports different business volumes such as ...

AI Technical Summary

Problems solved by technology

[0025] a) The base stations are provided by different manufacturers, and the mapping relationship between the DIUC defined in the DCD messages of different manufacturers and the specific coding and modulation methods is inconsistent; therefore, when the mobile station is covered by two such base stations in the same MBSZONE area When the area is transferred, the mobile station cannot accurately locate the actual modulation and coding mode of the current base station in the current base station according to the DIUC of the MBS service indicated by the MBS_MAP message in the previous base station at the previous moment, so it cannot decode;

[0026] b) Assuming that the mapping relationship between DIUC defined by DCD messages of base stations of different manufacturers and the specific coding and modulation methods is consistent, different base stations in the same MBS ZONE will change the mapping between DIUC and specific coding and modulation methods when updating DCD messages relationship, and different base stations do not synchronize when updating DCD messages (this is because DCD describes the "downlink channel descriptor", and its target object is limited to a certain base station, so the update of DCD is completely performed by each base station Independently controlled), the mobile station cannot exactly know the mapping relationship between the DIUC and the modulation and coding mode in the new base station only according to the DIUC of the MBS_MAP message, which leads to the inability to decode correctly, and thus cannot guarantee the continuous reception of the MBS service

[0027] In addition, the mobile station cannot achieve effective macro-diversity for MBS services

[0028] In the case of macro-diversity in the MBS service, the mobile station needs to receive the MBS service data delivered by two or more base stations at the same time, and the sending time of the MBS service for all the base stations in the same MBS ZONE is Synchronous, and the physical channel resources used should be consistent, such as sub-channels, OFDMA symbols, coding and modulation methods, etc. Since the DCD update times of different base stations cannot be synchronized, the mobile station cannot know exactly the two channels only based on the DIUC of the MBS_MAP message. The mapping relationship between DIUC and the exact coding and modulation method in different base stations, so that the correct decoding method cannot be used, and macro diversity cannot be realized.

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