Group Mobility Command for Wireless Handover Coordination
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Solution Overview
Problem
Current wireless communication systems face challenges in managing handover procedures for multiple User Equipments (UEs) moving together, leading to delays and failures due to the lack of efficient methods to deduce common mobility behaviors and handle mobility events separately for each UE.
Innovation Solution
The method involves grouping UEs with correlated mobility patterns to predict and prepare for handover events collectively, using a single mobility command for multiple UEs and leveraging mobility-related parameters like signal strength and geographical proximity to optimize handover procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual mobility procedures are performed for each UE, then mobility decisions can be made based on specific UE conditions, but the number of signaling messages and processing load increases significantly
Solution Approach 1:
The patent combines multiple individual mobility procedures into a single group mobility procedure. Instead of sending separate handover commands to each UE, the base station sends one mobility command to the entire UE group, which all UEs execute simultaneously. This merging approach maintains reliable mobility decisions while significantly reducing signaling overhead and processing complexity.
Solution Approach 2:
The mobility command is designed with universal applicability through the use of a group identifier that can be recognized by multiple UEs. The command structure allows a single message to serve multiple functions - it can be received and processed by any UE in the group without requiring UE-specific customization, thereby reducing the number of separate signaling messages needed.
2Adaptability or versatility
If mobility procedures are handled separately for each UE, then individual UE conditions can be addressed, but handover delays and failures increase due to lack of coordination
Solution Approach 1:
The base station performs preliminary actions by determining a mobility command in advance based on the mobility state of at least one UE in the group. This preliminary determination allows the base station to prepare and execute handover procedures proactively, coordinating the mobility actions of multiple UEs before actual handover events occur, thereby reducing delays and failures.
Solution Approach 2:
The system incorporates feedback mechanisms where UEs report their mobility states to the base station, which then uses this information to determine appropriate mobility commands for the entire group. This feedback loop ensures that individual UE conditions are considered while maintaining coordinated group-wide handover actions, improving overall handover reliability.
3Ease of operation
If separate handover commands are sent to each UE, then each UE can be instructed individually, but the time required for handover procedures increases
Solution Approach 1:
The patent merges multiple individual handover commands into a single group mobility command. This unified command structure allows the base station to instruct multiple UEs simultaneously without requiring separate signaling messages for each UE, thereby significantly reducing the time required for handover procedures while maintaining individual UE control through the group identifier and member indexing mechanism.
4Measurement precision
If mobility procedures are processed individually for each UE, then detailed UE-specific processing can be performed, but the base station becomes overloaded with processing tasks
Solution Approach 1:
The patent combines multiple individual mobility parameter processing tasks into a single group-level processing operation. Instead of the base station independently processing mobility parameters for each UE separately, the system processes mobility information at the group level, thereby reducing the total processing load on the base station while maintaining sufficient precision for mobility decisions through group representative parameters.
Data Source
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AI summary
Cooperating nodes, and methods therein, for mobility procedures in a wireless communication system supporting UE groups. One of the cooperating nodes is a base station being associated with a UE group comprising UEs having correlated mobility related parameters. The method in the base station comprises receiving, from a first UE in the UE group, a mobility related parameter associated with the first UE. The method further comprises determining whether to initiate a mobility related procedure for a second UE in the UE group based on the received mobility related parameter; and further comprises initiating the mobility related procedure for the second UE when it is determined that the mobility related procedure is to be performed. Thereby, prediction and decisions related to mobility events, e.g. handover events, for the second UE or for the whole group may be performed e.g. before or without receiving any mobility information related to the second UE, thereby enabling early prediction and better preparation, which can lead to more robust mobility procedures.