Postponing Network Reselection During MBMS Reception
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Solution Overview
Problem
Periodic network reselection searches in wireless communication systems can negatively impact user experience by interrupting Multimedia Broadcast Multicast Services (MBMS) due to the time required for the search, which may lead to service interruptions and poor quality of service, especially when a user is receiving MBMS services in an idle mode.
Innovation Solution
A method where user equipment (UE) postpones or interleaves periodic network reselection searches with MBMS service reception, allowing the search to be performed during gaps or overlaps with MBMS transmission bursts, and delays switching to a higher priority PLMN until the MBMS service concludes to minimize service disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs a periodic network reselection search for a higher priority PLMN, then the network selection reliability is improved, but the MBMS service continuity deteriorates due to service interruptions
Solution Approach 1:
The patent applies dynamics by making the network reselection search behavior adaptive rather than static. The UE dynamically adjusts its reselection search timing based on whether it is currently receiving MBMS services. When MBMS service is detected, the periodic reselection search is postponed; when no MBMS service is received, the search proceeds normally. This dynamic adjustment resolves the contradiction by allowing the system to prioritize network selection reliability when not engaged in service, while preserving MBMS service continuity when actively receiving broadcasts.
Solution Approach 2:
The patent modifies the periodic nature of the network reselection search. Instead of performing searches at fixed periodic intervals regardless of service state, the search is conditionally postponed during MBMS service reception. The periodic action is maintained when appropriate (no service) but suspended when service reception is detected, thus resolving the contradiction between maintaining periodic network searches and ensuring service continuity.
2Adaptability or versatility
If the UE performs a periodic network reselection search, then the network priority management is improved, but the user experience deteriorates due to service interruptions
Solution Approach 1:
The system dynamically adapts its network reselection behavior based on service state. When the UE is receiving MBMS services, the reselection search is postponed to avoid interrupting the user experience. When no service is received, the search proceeds to maintain proper network priority management. This dynamic adaptation resolves the contradiction by making the system responsive to user needs while maintaining network management integrity.
Solution Approach 2:
The patent implements feedback by having the UE detect whether it is currently receiving MBMS services and use this information to control the timing of network reselection searches. The feedback loop (detect service state → adjust search timing) ensures that network priority management activities do not negatively impact user experience during active service reception, while still maintaining proper network management when services are not being received.
3Measurement precision
If the UE performs a periodic network reselection search on multiple frequencies, then the network selection accuracy is improved, but the service reception quality deteriorates due to time consumption
Solution Approach 1:
The patent applies dynamics by conditionally adjusting the duration and timing of frequency scanning based on service state. When MBMS service is detected, the extensive multi-frequency search is postponed, preserving service reception quality. When no service is received, the complete multi-frequency search is performed to ensure accurate network selection. This dynamic timing adjustment resolves the contradiction between thorough network selection and continuous service quality.
Solution Approach 2:
The patent applies preliminary action by checking for the presence of MBMS service before initiating the network reselection search. If service is detected, the search is postponed, effectively performing the network selection activity in advance of when it would be needed (after service completion). This prevents the lengthy multi-frequency search from interrupting ongoing service reception.
Data Source
AI summary
A user equipment (UE) registers on a first Public Land Mobile Network (PLMN) and, while in an idle mode, receives a Multimedia Broadcast Multicast Services (MBMS) service. The UE determines whether to perform a periodic network reselection search for a higher priority PLMN while in the idle mode, wherein the UE determines whether to perform the periodic network reselection search based on reception of the MBMS service. The UE may postpone the periodic network reselection search for a period of time while the UE receives the MBMS service in the idle mode. The UE may postpone the periodic network reselection search for a period of time while the UE receives the MBMS service in the idle mode. The UE may interleave the periodic network reselection search with the reception of transmission bursts of the MBMS service, the search being performed on frequencies other than that of the MBMS transmission.