Wireless Device Paging Response Configuration for 5G Access Selection
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Solution Overview
Problem
In wireless communication networks, especially in the transition to 5G, UEs face challenges in efficiently responding to paging messages due to the need for frequent cell reselection and handovers, leading to increased overhead and session establishment delays, particularly when camping on legacy RATs with better coverage but requiring access to newer, spottily covered 5G RATs.
Innovation Solution
A method where wireless devices receive configuration information indicating how to respond to a paging message on a different access technology, cell, or frequency band than received, allowing them to respond optimally without constant reselection and handovers, by separating synchronous and asynchronous functions in the RAN and enabling dual connectivity between LTE and 5G RATs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs camp on legacy RATs with better coverage, then coverage reliability is improved, but session establishment delay increases due to frequent handovers to 5G RATs
Solution Approach 1:
The network provides configuration information in advance to the UE, indicating which access (RAT, cell, or frequency band) should be used for responding to paging messages. This preliminary configuration allows the UE to directly camp on the optimal legacy RAT without performing frequent measurements and reselection evaluations, thereby reducing session establishment delay while maintaining coverage reliability.
Solution Approach 2:
The patent introduces configuration information as an intermediary mechanism that mediates between the network's paging function and the UE's access selection. This configuration information acts as a pre-coordinated instruction that enables the UE to respond to paging on the most suitable access without ad-hoc decision-making, thus resolving the contradiction between coverage reliability and session establishment efficiency.
2Productivity
If UEs perform frequent measurements and cell reselection evaluations to camp on optimal RATs, then service quality is improved, but UE power consumption increases
Solution Approach 1:
The network performs the complex measurement and evaluation work in advance by determining the optimal access for each UE and providing configuration information accordingly. This preliminary action eliminates the need for UEs to perform frequent measurements and reselection evaluations, thereby maintaining high service quality while significantly reducing UE power consumption.
Solution Approach 2:
The network serves itself by making the access selection decisions that would otherwise require continuous UE measurements and evaluations. By providing configuration information, the network enables UEs to simply follow pre-determined instructions, transforming a UE-intensive process into a network-managed process that reduces overall system energy consumption.
3Adaptability or versatility
If UEs camp on 5G RAT for 5G services, then service capability is improved, but signaling load increases due to frequent location area updates
Solution Approach 1:
The network provides configuration information in advance that indicates the optimal access for responding to paging messages. This allows UEs to camp on legacy RATs when appropriate, avoiding frequent location area updates and reducing signaling load, while still maintaining the capability to access 5G services when needed through the configured access information.
Data Source
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AI summary
The disclosure relates to a method for responding to a paging message in a wireless device of a wireless communication network. The method comprises receiving (910) a paging message from the wireless communication network on a first access. The method also comprises receiving (920) configuration information from the wireless communication network indicating how to respond to the received paging message. The configuration information comprises information indicating that the received paging message should be responded to on another access than the first access. An access comprises at least one of a radio access technology, a cell, and a frequency band. The method further comprises responding (930) to the paging message as indicated by the received configuration information. The disclosure also relates to a corresponding method performed in the network, and to the corresponding apparatus.