Multiplexing method for broadcast multicast service data and de-multiplexing method

Abstract

The method includes steps: network side transfers each broadcast / multicast traffic (BMT) data after processed by medium access control layer to physical layer; based on multiplexing control information, physical layer executes multiplexing process for each BMT data. The invention also discloses method for demultiplexing BMT data. The demultiplexing method includes steps: after demodulation at physical layer, UE obtains multiplexing control information (MCI) in use for multiplexing processing BMT data down sent from network side; based on MCI, physical layer only carries out demultiplexing and demodulating processes for relevant BMT data in broadcast / multicast multiplexing traffic data down sent from network side. The invention reduces power consumption needed by UE to demodulate multiplexing data, and guarantees that all UE with different transmission bandwidth can receive needed BMT, and gets better balance between performance of BMT and use ratio of wireless resources.

Description

technical field [0001] The present invention relates to the technical field of broadcast and multicast services in the third generation mobile communication system and the next generation mobile communication system, in particular to a method for multiplexing broadcast and multicast service data and a corresponding demultiplexing method. Background technique [0002] With the development of mobile communication technology, users' demand for mobile communication services is no longer satisfied with voice services. Due to the third generation mobile communication system and the next generation mobile communication system (such as Orthogonal Frequency Division Multiplexing OFDM, Orthogonal Frequency Division Multiplexing system, etc.) can provide a higher data transmission rate than the second-generation mobile communication system, so a large number of multimedia services have emerged, such as: video calls, picture downloads, high-speed Internet browsing and other services. Am...

AI Technical Summary

Problems solved by technology

In this way, if the network side multiplexes different MBMS service data at the MAC layer, the same channel coding method and modulation method must be used for different MBMS service data with different BER requirements at the physical layer. The service performance requirements of multiplexed MBMS services will lead to a decrease in the utilization rate of radio resources; and if the utilization rate of radio resources is to be guaranteed, the service performance requirements of part of the multiplexed MBMS services cannot be guaranteed

[0013] 3. In the next-generation mobile communication system, such as the OFDM system being developed by the Long Term Evolution (LTE, Long Term Evolution), it will support different UEs to receive MBMS service data delivered by the network side based on different transmission bandwidths In this way, if the network side multiplexes multiple different MBMS service data at the MAC layer, the transmission bandwidth of the MBMS service data will be increased, which may cause UEs with low transmission bandwidth capabilities to be unable to receive the corresponding MBMS business

For example: the network side wants to send MBMS service 1 (S1) and MBMS service 2 (S2), assuming that sending service S1 needs to occupy a transmission bandwidth of 3MHz, and sending service S2 needs to occupy a transmission bandwidth of 5MHz, the two MBMS services to be delivered by the network side After the services (S1 and S2) are multiplexed at the MAC layer, they will occupy a transmission bandwidth of 8MHz for delivery; in this way, when the transmission bandwidth capability of a user UE1 that only subscribes to MBMS service 1 (S1) is 5MHz, the physical The layer can only see a service flow with a transmission bandwidth of 8MHz, which has exceeded its own transmission bandwidth capacity of 5MHz, so it will not be able to receive the MBMS service data multiplexed and sent by the network side, so it will not be able to receive the MBMS service it subscribes to1 (S1) data

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