User Equipment Frequency Band Group Update for Cell Reselection
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Solution Overview
Problem
In mobile communication networks, user equipment (UE) struggles to detect neighboring cells successfully during cell reselection due to prolonged dedicated signaling and mismatched frequency bands, leading to unstable communication connections when moving to new cells.
Innovation Solution
A method and device that allow user equipment to receive a message indicating a switch from connected to idle state, updating its stored frequency band group with a new set of frequency bands, including both general and dedicated bands, to detect neighboring cells based on priority, ensuring timely updates and improved detection success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system designates the UE to detect signal quality on only a few frequency bands through dedicated signaling for load balance, then the system load is balanced, but the UE cannot detect neighboring cells successfully when moving fast to a remote location because the dedicated signaling has not expired and the frequency band of the neighboring cell differs from the designated frequency band
Solution Approach 1:
The patent makes the frequency band group dynamic by allowing the UE to update its stored frequency band group with new frequency band groups received in RRC connection release messages. This enables the frequency band configuration to adapt to changing network conditions and UE locations, resolving the contradiction between maintaining load balance through dedicated signaling and ensuring neighboring cell detection success when moving to remote locations with different frequency bands.
Solution Approach 2:
The patent changes the parameter of frequency band group by receiving new frequency band groups from the base station through RRC connection release messages and updating the stored frequency band group. This parameter change allows the UE to transition from using outdated dedicated frequency bands to using updated frequency bands that match the current network environment, thereby improving neighboring cell detection success rate while maintaining system load balance.
2Ease of operation
If the UE uses the stored frequency band group for neighboring cell detection, then the detection process is simple, but the detection fails when the stored frequency band group is outdated and does not match the current network environment
Solution Approach 1:
The patent applies preliminary action by having the base station proactively send frequency band group information to the UE through RRC connection release messages before the UE needs to perform cell reselection. This preliminary update ensures that the UE's stored frequency band group is current and matches the network environment when the UE actually needs to detect neighboring cells, maintaining both detection simplicity and accuracy.
3Reliability
If the UE monitors signal quality on all configured frequency bands, then the UE can detect neighboring cells accurately, but the power consumption and processing complexity increase significantly
Solution Approach 1:
The patent applies local quality by having the UE focus its signal quality monitoring on a specific, updated frequency band group rather than all possible frequency bands. The frequency band group provided in RRC connection release messages identifies the relevant frequency bands for the UE's current location and network conditions, allowing the UE to concentrate its monitoring efforts locally on the most pertinent frequency bands, thereby maintaining detection accuracy while reducing power consumption and processing complexity.
Data Source
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AI summary
The present disclosure relates to a method and device for detecting a neighboring cell in cell reselection process and belongs to the field of mobile communication technology. The method comprises: receiving (201) a first message to indicate the user equipment to switch from connected state to idle state, the first message comprises a first frequency band group which comprises at least one frequency band; updating (202) a second frequency band group which has been stored in the user equipment according to the first frequency band group; and detecting (203) a neighboring cell on the at least one frequency band in the updated second frequency band group when performing cell reselection [Fig. 2].