MBMS Beam Selection for Radio Resource Efficiency
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Solution Overview
Problem
Current MBMS systems, such as eMBMS, inefficiently use radio resources due to static MBSFN area configurations and unadjusted subframe configurations, leading to unnecessary resource wastage, especially in dynamic user distributions and traffic loads.
Innovation Solution
A method where a terminal transmits an MBMS interest indication message to a base station, allowing it to select and use only specific beams for MBMS service provision, rather than all beams, based on scheduling information and user location, enabling dynamic adjustment of radio resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If MBSFN transmission is used to provide MBMS service across multiple cells, then service coverage is improved, but radio resources are wasted because all beams must be used even when users are located in only specific areas
Solution Approach 1:
The patent segments the MBMS service transmission by associating different services with specific beams. Instead of using all beams for all services, each MBMS service is transmitted only through its associated beam(s), dividing the overall transmission resource into service-specific segments. This resolves the contradiction by maintaining wide coverage through multiple beams while avoiding resource waste by activating only the necessary beams for each service.
Solution Approach 2:
The patent applies local quality by creating a one-to-one or one-to-many association between beams and MBMS services, where each service is transmitted through specific beam(s) tailored to the user distribution pattern. This localized transmission approach ensures that radio resources are concentrated in the specific spatial regions where users are located, rather than being distributed across all beams, thus reducing resource waste while maintaining adequate coverage.
2Reliability
If all beams are used for MBMS transmission, then service availability is improved, but resource allocation efficiency deteriorates due to unnecessary beam activation
Solution Approach 1:
The patent introduces dynamic beam selection for MBMS transmission based on user location information and service requirements. The network can dynamically determine which beams to activate for each MBMS service, adjusting the transmission configuration in real-time according to actual user distribution patterns. This dynamic approach maintains service availability by ensuring users can always receive services through appropriate beams while improving resource efficiency by activating only the necessary beams.
3Device complexity
If static MBSFN area configuration is used, then system complexity is reduced, but adaptability to dynamic user distribution deteriorates
Solution Approach 1:
The patent changes the configuration parameter from static MBSFN area definitions to dynamic beam-service associations. Instead of fixing service areas in advance, the system uses parameters such as user location information, service type, and beam characteristics to dynamically determine which beams should transmit which services. This parameter-based approach maintains relatively simple system architecture while significantly improving adaptability to changing user distributions and traffic patterns.
Data Source
AI summary
Provided are a method for transmitting a multimedia broadcast multicast service (MBMS) interest indication message by a terminal in a wireless communication system and an apparatus for supporting the same. The method may comprise the steps of: receiving MBMS scheduling information from a base station; selecting at least one beam among a plurality of beams; on the basis of the MBMS scheduling information, determining whether an MBMS service of interest is provided via the at least one selected beam; and when the terminal determines that the MBMS service of interest is not provided via the at least one selected beam, transmitting, to the base station, an MBMS interest indication message including the MBMS service of interest and the at least one selected beam.