Transmission mode selection and switching device used for multimedia broadcast multicast service

Abstract

The invention provides a send mode choose and switch device for an MBMS, comprising a threshold value set unit, a send mode choose unit and a send mode switch unit, wherein, the threshold value set unit is used for presetting a count cycle of a timer, a user device access probability factor, an M threshold and a P threshold of the number of the user device, a time threshold of an M event of the number of the user device entering an M state and a time threshold of a P event entering a P state; the send mode choose unit is used for counting the number of the user device according to the count response of the user device and the context of the user device and for choosing the send mode of the MBMS according to the counted number of the user device, the M threshold and the P threshold; the send mode switch unit is used for counting the number of the user device in real time according to the count response of the user device and the context of the user device and for determining whether the send mode of the MBMS is switched according to the real time counted number of the user device, the M threshold, the P threshold, the time threshold of the M event of the number of the user device entering the M state and the time threshold of the P event of the number of the user device entering the P state.

Description

technical field [0001] The present invention relates to the communication field, and more specifically relates to a transmission mode selection and switching device for multimedia broadcast and multicast services. Background technique [0002] Multimedia Broadcast Multicast Service (MBMS) can be divided into broadcast and multicast modes, and can also be divided into point-to-point (Point to Point, referred to as P-T-P) transmission and point-to-multipoint (Point to Multipoint, referred to as P-T-M) transmission . The P-T-P transmission mode of MBMS in the Universal Terrestrial Radio Access Network (UTRAN for short) adopts the same protocol structure and process as the traditional point-to-point packet switching (Packet Switched, PS) service: dedicated control for signaling Dedicated Control Channel (DCCH for short), Dedicated Traffic Channel for business (DTCH for short), mapped to Dedicated Channel (DCH for short) or High Speed ​​Downlink Shared Channel (HS-HS for short) ...

AI Technical Summary

Problems solved by technology

[0003] In the multicast mode, the use of P-T-P and P-T-M transmission has its own advantages and disadvantages: the use of P-T-P transmission is simple, but in the case of a large number of UEs, it will waste wireless resources; the use of P-T-M transmission, when the number of users reaches a certain number, It can fully save code resources and power resources, but requires the system to increase the overhead of related logical channels

In the process of MBMS service, some users may be terminated, and some new users may join in the middle, which will cause the number of active users to change, which may lead to frequent switching of sending methods. Frequent switching of MBMS sending methods may seriously affect the service quality of the business. (Quality of Service, referred to as QoS), currently for this situation, no public method has been found

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