MBSFN Area Usage Indication for Wireless UE Power Saving
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Solution Overview
Problem
In wireless communication systems, low complexity User Equipment (UE) face challenges in efficiently indicating and accessing multicast-broadcast single-frequency network (MBSFN) areas for multimedia broadcast multicast services (MBMS), leading to increased power consumption and slower service acquisition.
Innovation Solution
Providing an identifier for MBSFN area usage via system information, allowing UE to quickly determine if an MBSFN area is for low complexity/cost UE, MTC, D2D, or public safety, enabling selective MCCH reading and reducing unnecessary power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low complexity UE monitors all MBSFN areas to ensure service availability, then service coverage is improved, but power consumption increases
Solution Approach 1:
The patent segments MBSFN areas into two distinct types: interest MBSFN areas for which the UE is interested in receiving MBMS services, and non-interest MBSFN areas for which the UE is not interested. This segmentation allows the UE to selectively monitor only interest areas, reducing power consumption while maintaining service availability for relevant services.
Solution Approach 2:
The patent applies local quality by assigning different monitoring characteristics to different MBSFN areas based on UE interest. Interest MBSFN areas are monitored with full attention and resource allocation, while non-interest areas are excluded from monitoring. This localized differentiation optimizes power usage specific to each area's relevance to the UE.
2Loss of information
If low complexity UE reads all MCCH information to ensure complete service information, then information completeness is improved, but service acquisition time increases
Solution Approach 1:
The patent extracts and filters MCCH information based on MBSFN area interest. The UE reads MCCH information only for interest MBSFN areas, extracting only the relevant service information needed. This extraction approach maintains information completeness for services the UE cares about while eliminating unnecessary reading of non-interest area information, thereby reducing service acquisition time.
Solution Approach 2:
The patent employs preliminary action by having the network provide indication information in advance that identifies which MBSFN areas are of interest to the UE. This preliminary indication allows the UE to pre-determine which MCCH information to read, avoiding the need to read all MCCH information and significantly reducing service acquisition time while maintaining completeness of relevant information.
3Measurement precision
If system provides detailed MBSFN area usage information, then UE service selection accuracy is improved, but system information overhead increases
Solution Approach 1:
The patent extracts only the essential usage information needed for service selection from the complete MBSFN area configuration. Instead of providing all detailed configuration parameters, the system extracts and provides only the usage indication information that enables the UE to identify interest versus non-interest areas. This extraction maintains service selection accuracy while minimizing system information overhead.
Solution Approach 2:
The patent changes the parameter representation by introducing a simplified usage indication parameter that categorizes MBSFN areas into interest and non-interest types. This parameter transformation converts detailed configuration data into a compact indication format, achieving accurate service selection based on usage type while significantly reducing the quantity of system information that needs to be transmitted and processed.
Data Source
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AI summary
A method for indicating usage of a multicast-broadcast single-frequency network (MBSFN) area in a wireless communication system is provided. A network indicates an identifier indicating usage of an MBSFN area via system information to a user equipment (UE). The UE determines whether to read a multicast control channel (MCCH) corresponding to the MBSFN area according to the received identifier.