Paging Subgroup ID Handling for Seamless Cell Reselection
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Solution Overview
Problem
In the New Radio (NR) system, when a User Equipment (UE) undergoes cell reselection, the subgroup ID assigned by the previous cell may not be included in the target cell's subgroup IDs, preventing normal paging listening due to varying grouping strategies across different base stations.
Innovation Solution
The UE obtains paging group configuration information from the access network device, which includes a default paging subgroup ID and a maximum paging subgroup ID, allowing it to perform paging listening based on these IDs. If the UE's subgroup ID exceeds the maximum, it uses the default ID, ensuring seamless paging listening during cell reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station divides UEs into several subgroups and assigns subgroup IDs to avoid unnecessary paging listening, then paging listening efficiency is improved, but device compatibility deteriorates when UEs perform cell reselection to cells with different grouping strategies
Solution Approach 1:
The target access network device determines the subgroup ID corresponding to the UE before the UE performs paging listening in the target cell. By preliminarily determining the appropriate subgroup ID based on the UE's identity and the target cell's paging group configuration, the system ensures that the UE can seamlessly continue paging listening without interruption or reconfiguration during cell reselection, thus maintaining both efficiency and compatibility.
2Productivity
If different base stations use varying grouping strategies for UEs, then local paging optimization is improved, but system-wide compatibility deteriorates during cell reselection
Solution Approach 1:
The system changes the parameter of subgroup ID assignment dynamically based on the cell reselection event. When a UE reselects to a target cell, the target access network device determines a new subgroup ID for the UE based on the target cell's paging group configuration and the UE's identity, rather than using the source cell's grouping strategy. This parameter adaptation ensures local optimization is maintained while achieving system-wide compatibility.
3Duration of action of stationary object
If the UE uses the subgroup ID assigned by the previous cell for paging listening in the target cell, then paging listening continuity is improved, but paging listening accuracy deteriorates when the subgroup ID is not included in the target cell's subgroup IDs
Solution Approach 1:
The target access network device provides feedback information to the UE regarding the determined subgroup ID for paging listening in the target cell. This feedback mechanism ensures that the UE receives accurate guidance on which subgroup to monitor, maintaining both continuity of paging listening service and accuracy by preventing the UE from listening to incorrect or non-existent subgroups in the target cell.
Data Source
AI summary
The present disclosure belongs to the technical field of communications. Provided are a paging indication method and apparatus, and a user equipment (UE), an access network device and a storage medium. The method includes: a UE acquiring paging group configuration information which is indicated by an access network device, wherein the paging group configuration information includes a default paging subgroup serial number ID, and the default paging subgroup ID is an ID of any paging group from among paging groups that correspond to the access network device.