SYNC Entity Configuration for MBSFN Service Synchronization
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Solution Overview
Problem
The configuration of SYNC entities between a base station (eNB) and a Broadcast Multicast Service Center (BM-SC) is challenging, particularly in managing service multiplexing and ensuring content synchronization across MBSFN areas, where each cell belongs to one MBSFN area and transmits the same service.
Innovation Solution
The method involves creating, updating, and releasing SYNC entities by associating them with services or service groups in a one-to-one correspondence manner, using instructions sent between the BM-SC and eNBs within an MBSFN area, including service identification and start/termination indications to manage synchronization effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SYNC entities are configured for each service individually, then service synchronization precision is improved, but device complexity and management overhead increase
Solution Approach 1:
The patent merges multiple services into service groups, where each service group shares a common SYNC entity. This reduces the total number of SYNC entities from one per service to one per service group, thereby reducing configuration complexity while maintaining synchronization precision through group-level coordination
Solution Approach 2:
A single SYNC entity is designed to serve multiple services within a service group, making it a universal synchronization component. This multi-functional approach reduces the overall number of SYNC entities needed in the system while maintaining adequate synchronization for all services
2Adaptability or versatility
If SYNC entities are frequently created and released to adapt to service changes, then adaptability is improved, but system stability deteriorates
Solution Approach 1:
By combining multiple services into service groups with shared SYNC entities, the system reduces the frequency of SYNC entity creation and release operations. When services change, only the service group membership needs adjustment rather than creating/destroying individual SYNC entities, thus improving stability while maintaining adaptability
Solution Approach 2:
The system pre-establishes SYNC entities at the service group level before services are fully deployed. This preliminary creation of SYNC entities allows for smoother service additions and removals without requiring frequent SYNC entity lifecycle management, thereby stabilizing the system while maintaining adaptability
3Device complexity
If service multiplexing is implemented to reduce complexity, then device complexity is reduced, but measurement precision of synchronization may deteriorate
Solution Approach 1:
The patent segments services into service groups that share SYNC entities, creating a hierarchical structure. This segmentation allows synchronization to be managed at the group level rather than individual service level, reducing complexity while maintaining precision through proper group boundaries and synchronization coordination mechanisms
Data Source
AI summary
The present invention provides processes of creating, updating, and releasing SYNC entities between eNB and BM-SC, and an eNB and a BM-SC for implementing the processes of creating, updating, and releasing the SYNC entities. According to a solution of the present invention, a method of creating SYNC entities is provided, including: creating, at a BM-SC, a plurality of SYNC entities whose amount is equal to the total amount of services, and associating the created plurality of SYNC entities with the services in a one-to-one correspondence manner; sending a SYNC entity creating instruction to all eNBs within an MBSFN area; creating, at each eNB, a plurality of SYNC entities whose amount is equal to the total amount of services based on the received SYNC entity creating instruction, and associating the created plurality of SYNC entities with the services in a one-to-one correspondence manner.