Selective MBMS-MDT for Wireless UE Memory Constraints
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing MBMS-MDT methods in LTE systems cause overhead for user equipment (UE) when configured for multiple multicast broadcast single frequency network (MBSFN) areas, leading to insufficient memory for storing logged results for a single area due to shared memory resources.
Innovation Solution
A method and apparatus for performing selective MBMS-MDT, where the UE receives a configuration from the network and selects a subset of MBSFN areas providing interested MBMS services, performing MBMS-MDT only for this selected subset, thereby restricting the number of areas on which MBMS-MDT is performed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MBMS-MDT is configured for multiple MBSFN areas, then the UE can perform comprehensive measurement coverage, but the UE experiences overhead and insufficient memory for storing logged results
Solution Approach 1:
The patent segments the set of MBSFN areas into a subset that the UE will actually perform MDT measurements on. The UE receives configuration information for multiple MBSFN areas but selectively performs MDT only for a subset of these areas, thereby reducing processing overhead and memory requirements while maintaining adequate measurement coverage for the services of interest.
Solution Approach 2:
The patent applies local quality by making the UE perform MDT measurements selectively based on local conditions - specifically, only for MBSFN areas where the UE is actually receiving or interested in receiving MBMS services. This localized approach ensures that measurement resources are allocated efficiently to areas with actual service relevance rather than uniformly across all configured areas.
2Adaptability or versatility
If MBMS-MDT is performed for multiple MBSFN areas, then comprehensive service coverage is achieved, but memory resources become insufficient for accurate logging
Solution Approach 1:
The patent segments the measurement scope by restricting MDT performance to a subset of MBSFN areas rather than all configured areas. This segmentation allows the UE to maintain comprehensive service coverage for areas where services are actually delivered while preserving sufficient memory capacity for accurate logging by avoiding redundant storage requirements across all areas.
Solution Approach 2:
The patent applies partial action by having the UE perform MDT measurements only for a subset of MBSFN areas rather than all configured areas. This partial approach provides sufficient measurement data for services of interest without the excessive memory consumption that would result from attempting to log measurements for all configured areas.
3Loss of information
If the UE performs MDT for all configured MBSFN areas, then complete measurement data is obtained, but processing overhead increases significantly
Solution Approach 1:
The patent applies local quality by having the UE perform MDT measurements selectively based on local service reception conditions. The UE measures only for MBSFN areas where it is actually receiving or interested in receiving services, thereby obtaining sufficient measurement data for practical purposes while significantly reducing processing overhead compared to measuring all configured areas.
Data Source
AI summary
A method and apparatus for performing multimedia broadcast multicast service (MBMS) minimization of drive test (MDT) in a wireless communication system is provided. Upon receiving a MBMS-MDT configuration from a network, a user equipment (UE) selects a subset of multicast broadcast single frequency network (MBSFN) areas among multiple MBSFN areas providing interested MBMS services, and performs MBMS-MDT only for the selected subset of MBSFN areas. The subset of MBSFN areas may be selected based on priorities of the multiple MBSFN areas.