Method, system and base station for implementing multimedia broadcasting multicast service

Abstract

A method for realizing multimedia broadcast / multicast service MBMS comprises: the base station adjusts the downlink modulation mode according to the uplink indication information fed back by terminals, and provides MBMS service to terminal according to the adjusted downlink modulation mode. Moreover, a system and a base station for MBMS are provided, the system comprises base station and terminals, and the base station comprises a receiving unit, a transmitting unit and a adjusting unit. The present invention can save power resources and ensure the MBMS QoS in the mean time.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for realizing a Multimedia Broadcast / Multicast Service (MBMS), an MBMS system and a base station. Background of the invention [0002] Broadcast and multicast are ways to transmit data from one data source to multiple users. In traditional mobile networks, the cell broadcast service allows low bit rate data to be sent to all users through the cell shared broadcast channel. Now people's demand for mobile communication is no longer satisfied with telephone and message services. With the rapid development of the Internet, a large number of multimedia services have emerged. Some of the application services allow multiple users to receive the same data at the same time, such as video on demand, TV, etc. Broadcasting, video conferencing, online education, interactive games, and more. Compared with general data, these mobile multimedia services have the characteristics of...

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the main defect of MBMS based on the downlink S-CCPCH is: since the MBMS service is required to achieve full coverage in the cell, no matter whether the MBMS user is currently far from the base station or not, the transmission power must be transmitted according to the coverage requirements at the edge of the cell, which is likely to cause power loss. waste; and, because no closed-loop power control is adopted, in order to counteract the poor channel conditions that MBMS users may encounter and obtain a certain degree of user receiving satisfaction, it is necessary to transmit very high power. When the number of MBMS users is relatively small, the power resource Waste is more serious

[0008] It is not flexible enough to provide business service quality and downlink resource utilization, and does not bring the greatest value to the operator. For example, if the operator adopts MBMS based on S-CCPCH, it must be deployed according to the business plan to implement S-CCPCH in the corresponding cell. -The full coverage of CCPCH is allocated according to certain cell code resources and power resources. These resources are relatively poor in resource sharing with other downlink channels such as dedicated downlink channels, and S-CCPCH does not have a composite retransmission mechanism. The flexibility of exchanging transmission delay for power reduction is relatively poor, and it cannot provide a compromise between business service quality and downlink resources, and cannot provide diversification of service quality

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