MBMS Service Continuity via Group Identity Handover
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Solution Overview
Problem
Existing MBMS systems based on MBSFN areas have a static division and cannot be dynamically adjusted, leading to inefficiencies in small-range group communication, where services are broadcast in all cells even if not required, resulting in service interruption delays during handovers.
Innovation Solution
The proposed method involves a source base station obtaining and sending the first group identity information of an MBMS service to a terminal device in a neighboring cell, allowing the terminal to continue receiving service content without interruption by using the same group identity information in the neighboring cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SC-PTM based on predefined service is used, then air interface efficiency is improved, but service interruption delay increases during handover
Solution Approach 1:
The source base station performs preliminary actions by obtaining the first group identity information from the target base station before the terminal actually needs to hand over. This advance preparation ensures that the group identity information is ready in advance, eliminating the need for the terminal to read broadcast information during handover and thus reducing service interruption delay.
Solution Approach 2:
The source base station acts as an intermediary between the terminal and the target base station. It obtains the group identity information from the target base station and then provides it to the terminal, serving as a mediator that facilitates smooth handover without requiring the terminal to directly access broadcast information in the target cell.
2Adaptability or versatility
If SC-PTM with dynamic configuration is used, then adaptability is improved, but service interruption delay increases
Solution Approach 1:
The source base station performs preliminary action by obtaining the first group identity information from the target base station before handover occurs. This advance acquisition of configuration information allows the terminal to continue receiving services without interruption, even when dynamic configuration is required, thus resolving the contradiction between adaptability and service continuity.
3Area of stationary object
If MBSFN area broadcast is used, then coverage is improved, but resource efficiency deteriorates for small-range communication
Solution Approach 1:
The invention segments the service delivery approach by introducing single-cell point-to-multipoint transmission as an alternative to area-wide MBSFN broadcast. This segmentation allows services to be delivered only to terminals in specific cells that require them, rather than broadcasting to all cells in the MBSFN area, thus improving resource efficiency while maintaining coverage where needed.
Solution Approach 2:
The invention applies local quality by enabling different transmission modes in different cells based on local requirements. Cells can operate in SC-PTM mode for localized service delivery or MBSFN mode for wide-area broadcast, depending on the specific needs of terminals in each cell, thus optimizing both coverage and resource efficiency.
Data Source
AI summary
Embodiments of this application provide an MBMS service communication method and a base station, and relate to the communication field. The method includes: A source base station obtains first group identity information of an MBMS service of a terminal device in a neighboring cell; and the source base station sends the first group identity information to the terminal device. In this application, after moving to or accessing the neighboring cell, the terminal device may continue to receive service content and information of the MBMS service based on the first group identity information that is of the MBMS service in the neighboring cell and that is obtained from the source base station.