Method for implementing group broadcasting service of multi-media broadcast

Abstract

This invention provides a method for realizing MBMS, which distributes same user ID to MBMS users and loads the MBMS service on a down share channel to distribute them to the users, each of them feeds back the channel quality instruction and data received performance to a base station based on its own channel quality state and data performance, which adjusts the MBMS down transmission format or emission power to transmit the MBMS service timely so as to control and increase the service quality and use the power resources and increase the service load ability of the MBMS service on the down share channel.

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). Background technique [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 large data volume, long duration, and tim...

AI Technical Summary

Problems solved by technology

[0005] 1) Since the MBMS service is required to achieve full coverage in the cell, no matter how far the MBMS user is from the base station or not, the power must be transmitted according to the coverage requirements at the edge of the cell, resulting in inflexible power usage

[0006] 2) 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 satisfaction, it is necessary to transmit very high power. When the number of MBMS users is relatively small, power resources are wasted more serious

[0007] 3) After the MBMS service carried on the S-CCPCH is sent to the MBMS user, the base station cannot quickly obtain the reception satisfaction of the MBMS user, so it cannot quickly adjust the MBMS user satisfaction through downlink transmission control, resulting in the service guarantee of the MBMS service relatively poor sex

[0008] 4) Due to the relatively limited rate of supported MBMS services, considering the need to achieve full cell coverage, the rate of MBMS services will be much lower than 1Mbps. Therefore, for MBMS services with high-quality multimedia requirements in the future, MBMS services based on downlink S-CCPCH There may be a certain bottleneck in the transmission rate

[0009] 5) It is not flexible enough to provide business service quality and downlink resource utilization, and does not bring the greatest value to operators. For example, if an operator adopts MBMS based on S-CCPCH, it must be deployed according to the business plan. Realize the full coverage of S-CCPCH, and allocate 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, so in The flexibility of exchanging retransmission 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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