Anchor WTRU Coordination for Synchronized Group Handover
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Solution Overview
Problem
Existing wireless communication systems fail to coordinate handovers for groups of wireless transmit/receive units (WTRUs) considering application layer requirements, leading to potential loss of synchronized multimedia experiences due to asynchronous data transmission.
Innovation Solution
A system and method enabling a single WTRU to act as an anchor for coordinated handover, overriding network messages and triggering handovers for other WTRUs within a group, based on predefined conditions and thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If each WTRU performs independent handover based on network messages, then handover decision speed is improved, but synchronization between group WTRUs deteriorates
Solution Approach 1:
The patent merges the handover decision-making function across multiple WTRUs by designating one WTRU as anchor. The anchor WTRU consolidates measurement results from all group WTRUs and makes the final handover decision, ensuring synchronized execution while maintaining individual measurement capabilities. This combining approach resolves the contradiction by centralizing the decision function that was previously distributed.
Solution Approach 2:
The anchor WTRU acts as an intermediary between the network and other group WTRUs. It receives measurement configurations from the network, collects measurement results from all WTRUs, makes the handover decision, and coordinates the execution. This intermediary role enables fast individual measurements while ensuring synchronized group handover execution through the anchor's coordinating function.
2Stability of the object's composition
If a single anchor WTRU coordinates handover for the group, then synchronization is improved, but control complexity increases
Solution Approach 1:
The patent segments the handover control function into distinct roles: the anchor WTRU handles high-level coordination and decision-making, while other group WTRUs focus on measurement and execution. This segmentation reduces the control burden on each individual WTRU and distributes the complexity appropriately, with the anchor managing synchronization while others perform specialized functions.
Solution Approach 2:
The anchor WTRU performs multiple functions including receiving measurement configurations from the network, collecting measurement results from all group WTRUs, making handover decisions, and coordinating execution. This multi-functionality consolidates control complexity into a single entity rather than requiring complex inter-WTRU coordination protocols, simplifying the overall system control architecture.
3Stability of the object's composition
If network controls handover for all WTRUs, then handover consistency is improved, but response time increases
Solution Approach 1:
The network performs preliminary actions by providing measurement configurations and candidate target cell information to the anchor WTRU in advance. The anchor then uses pre-collected measurement results from all group WTRUs to make rapid handover decisions without waiting for real-time network analysis. This preliminary preparation enables fast response while maintaining network-controlled consistency.
Solution Approach 2:
The anchor WTRU serves as an intermediary that enables fast local decision-making while preserving network control for consistency. It receives guidance from the network through measurement configurations and candidate cell information, then makes rapid handover decisions based on real-time measurements from all group WTRUs. This intermediary approach bridges the gap between network-controlled consistency and device-autonomous speed.
Data Source
AI summary
A system and method allowing a group of WTRUs in a group to be handed over in a coordinated manner are disclosed. The system and method include procedures for handling mobility and handover for a subset of WTRUs or all WTRUs belonging to a group, considering application layer requirements. Included procedures enable a single WTRU within a group of WTRUs to trigger handover for other WTRUs within the group. The system and method include procedures enabling a single WTRU to act as an anchor WTRU for handover control messages, allowing it to override handover messages sent by the network, allowing one WTRU in a group to coordinate handovers for all or a subset of WTRUs.