Wireless Handover Using TMGI and G-RNTI for MBS Continuity
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing signal timing and resource allocation across multiple carriers, particularly in scenarios involving carrier aggregation and dual connectivity, which can lead to service interruptions and delays during handovers and dual connectivity procedures.
Innovation Solution
The implementation of advanced timing advance group configurations and message flow optimizations, including the use of RRC connection reconfiguration messages to pre-configure UE with MBMS configuration parameters during handovers and SeNB additions, ensures seamless continuity of MBMS services by reducing the need for UE to wait for system information blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carrier aggregation and dual connectivity are implemented to enhance network capacity and connectivity, then service continuity and reliability are improved, but handover delays and service interruptions occur during mobility procedures
Solution Approach 1:
The patent applies preliminary action by pre-configuring the UE with MBMS configuration parameters from the source eNB before handover execution. The target eNB provides MBMS configuration parameters to the source eNB in advance, which are then forwarded to the UE via RRC connection reconfiguration messages prior to the actual handover, eliminating the need for UE to wait for system information blocks during handover.
Solution Approach 2:
The source eNB acts as an intermediary by receiving MBMS configuration parameters from the target eNB and forwarding them to the UE before handover. This intermediary mechanism allows the UE to obtain necessary configuration information without direct contact with the target eNB during the handover process, reducing handover delay and service interruption.
2Manufacturing precision
If system information blocks are transmitted periodically to ensure UE has up-to-date configuration, then configuration accuracy is improved, but service interruption occurs during handover when UE waits for system information
Solution Approach 1:
The patent implements preliminary action by having the target eNB provide MBMS configuration parameters to the source eNB in advance of handover. The source eNB then includes these pre-obtained parameters in RRC connection reconfiguration messages sent to the UE before handover executes, ensuring the UE receives accurate configuration without waiting for periodic system information transmission during handover.
3Device complexity
If MBMS configuration parameters are obtained through normal handover procedures, then procedure simplicity is maintained, but service continuity is interrupted due to parameter acquisition time
Solution Approach 1:
The patent applies preliminary action by having the source eNB obtain MBMS configuration parameters from the target eNB before executing handover. The source eNB then includes these parameters in RRC connection reconfiguration messages to the UE in advance, maintaining procedure simplicity while ensuring service continuity without additional complex steps during handover execution.
Data Source
AI summary
A non-transitory computer-readable medium comprises instructions that, when executed by one or more processors, cause the one or more processors to: receive, from a wireless device, one or more temporary mobile group identities (TMGIs) of one or more multimedia broadcast service (MBS) services that the wireless device is receiving or interested to receive; send, to a second base station, a message requesting a handover of the wireless device and comprising the one or more TMGIs; receive, from the second base station, an acknowledge message comprising a group-radio network temporary identifier (G-RNTI) associated with at least one of the one or more MBS services; and transmit, to the wireless device, a radio resource control message comprising the G-RNTI.