XR UE Group Paging for Synchronized Multi-Modal Sessions
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing multi-modal sessions for extended reality (XR) user equipment (UEs), leading to asynchrony due to separate paging of UEs in multi-modal sessions, which affects the immersive experience.
Innovation Solution
Introduce a multi-modal group paging mechanism using a unique group multi-modal service ID to page a group of XR UEs simultaneously, ensuring synchronization of distinct data flows within a synchronization threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate paging is used for each UE in multi-modal sessions, then individual UE paging can be performed, but asynchrony occurs between different UEs affecting immersive experience
Solution Approach 1:
The patent combines multiple individual UE paging operations into a single group paging operation by introducing a group ID that identifies multiple UEs participating in multi-modal sessions. The network device sends one group paging message to wake up all associated UEs simultaneously, eliminating the asynchrony that would occur with separate paging while maintaining reliable synchronized data stream delivery.
2Reliability
If group paging is implemented for multiple XR UEs, then synchronization is improved, but signaling complexity increases
Solution Approach 1:
The patent segments the paging function into individual UE-specific paging (for single UE scenarios) and group paging (for multi-modal session scenarios). The group paging is further segmented by introducing a group ID that can identify different sets of UEs for different multi-modal sessions. This segmentation allows the system to use the appropriate paging method based on the scenario, avoiding unnecessary complexity while maintaining synchronization when needed.
Solution Approach 2:
The group paging mechanism is designed to be universal and can handle multiple UEs in different configurations. The group ID can represent different groups of UEs for different multi-modal sessions, and the same group paging message structure can accommodate varying numbers of UEs and different service types, reducing the need for multiple specialized paging mechanisms.
3Ease of operation
If individual RRC setup is performed for each UE, then each UE can be configured properly, but signaling overhead increases
Solution Approach 1:
The patent merges individual RRC setup procedures into a group-based RRC setup where a single RRC message can configure multiple UEs simultaneously. The network device sends one RRC setup message containing configuration information for all UEs in the group, significantly reducing signaling overhead and energy consumption compared to sending separate RRC setup messages to each UE individually, while still providing proper configuration for each UE in the multi-modal session.
Data Source
AI summary
A method for wireless communication at an extended reality (XR) user equipment (UE) includes receiving an XR multi-modal group page associated with a group multi-modal paging identifier (ID) for a group of XR UEs including the XR UE. The group of XR UEs has a same multi-modal service ID. The method also includes transmitting an uplink message for radio resource control (RRC) setup of a deactivated multi-modal session, in response to receiving the XR multi-modal group page. The multi-modal session includes a set of distinct data flows for a same multi-modal service. A method of wireless communication at a network device includes generating a multi-modal paging ID based on a multi-modal service ID assigned to a group of XR UEs. The method also includes initiating a group page of inactive mode or idle mode XR UEs having the multi-modal paging ID.