User Equipment Frequency Priority for MBMS Service
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, user equipment (UE) in idle mode currently selects cells based on signal quality without considering the availability of Multimedia Broadcast Multicast Service (MBMS) frequencies, leading to potential inability to receive MBMS services if the selected cell does not provide them.
Innovation Solution
The UE identifies and prioritizes frequencies for cell reselection based on MBMS service availability, receiving priority information from the network via system information or dedicated signaling, and adjusts priorities if the MBMS service is stopped or not available in the area, ensuring higher priority for frequencies providing MBMS services during cell reselection in RRC idle mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment selects cells based on signal quality in idle mode, then connection reliability is improved, but MBMS service availability deteriorates
Solution Approach 1:
The patent implements dynamic frequency priority adjustment by modifying the cell reselection priority based on MBMS service requirements. When MBMS service is available on a frequency, the UE dynamically adjusts that frequency's priority higher than default signal-quality-based priorities, enabling adaptive behavior that balances connection reliability with MBMS service availability.
Solution Approach 2:
The patent changes the priority parameter used in cell reselection from static signal quality metrics to dynamic values that incorporate MBMS service availability information. The network provides frequency priority information indicating which frequencies support MBMS, and the UE uses this information to adjust reselection priorities, thereby ensuring MBMS service continuity while maintaining reliable connections.
2Stability of the object's composition
If user equipment prioritizes signal quality for cell reselection, then communication stability is improved, but MBMS service reception deteriorates
Solution Approach 1:
The patent applies preliminary action by having the network pre-provide frequency priority information to the UE before cell reselection occurs. This information indicates which frequencies support MBMS services, allowing the UE to proactively prioritize those frequencies during reselection rather than reacting after service interruption occurs.
Solution Approach 2:
The patent implements feedback mechanisms where the network provides frequency priority information to the UE based on MBMS service distribution status. The UE uses this feedback to adjust its cell reselection behavior, creating a closed-loop system that ensures MBMS service reception while maintaining communication stability.
3Device complexity
If user equipment uses default frequency priorities for cell reselection, then device complexity is reduced, but service availability deteriorates
Solution Approach 1:
The patent enables self-service by allowing the UE to autonomously adjust frequency priorities based on network-provided MBMS availability information. The UE independently modifies its cell reselection behavior without requiring complex network control or additional signaling, reducing overall system complexity while improving service availability.
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
A method for prioritizing frequencies by a user equipment (UE) in a wireless communication system is disclosed. The method comprises identifying a plurality of frequencies, each frequency having a corresponding priority; and considering a specific frequency to be the highest priority among the plurality of frequencies, wherein the specific frequency is for a MBMS (Multimedia Broadcast Multicast Service) service.