MAC Reset Mechanism for 5G NR MBS Service Continuity
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Solution Overview
Problem
Current 5G NR MBS communication systems face challenges in performing MAC reset and RRC procedures efficiently, leading to service disruptions and degraded user experience due to lack of flexible HARQ feedback mechanisms and group paging handling.
Innovation Solution
A method and UE implementation that enhance MAC reset mechanisms by considering broadcast/multicast receptions, providing flexible HARQ feedback configurations, and implementing group paging reception procedures to ensure uninterrupted and lossless MBS communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional MAC reset procedure is performed in 5G NR MBS communication, then the MAC entity is reset to initial state, but service disruption and packet loss occur due to clearing of HARQ buffers and termination of DRX timers
Solution Approach 1:
The patent segments the MAC reset operation into selective resetting based on service type. For MBS services, the reset is modified to preserve HARQ buffers and DRX timers while still resetting other MAC parameters. This segmentation allows different parts of the MAC entity to be treated differently during reset, preventing service disruption and packet loss in MBS communication.
Solution Approach 2:
The patent applies local quality by making the reset behavior service-dependent. When MBS service is detected, the reset procedure applies special handling (preserving HARQ buffers and DRX timers) compared to conventional reset. This localized differentiation ensures that MBS-specific parameters are not cleared, maintaining service continuity while other MAC functions are reset.
2Adaptability or versatility
If flexible HARQ feedback configuration is implemented for MBS, then HARQ feedback modes can be adapted to service requirements, but system complexity increases due to additional configuration parameters and procedures
Solution Approach 1:
The patent implements dynamic HARQ feedback configuration where the feedback mode can be adjusted based on service requirements. The system can dynamically switch between different HARQ feedback modes (e.g., mode 1 with ACK/NACK, mode 2 with NACK only, mode 3 without feedback) depending on the MBS service characteristics, providing flexibility while managing complexity through service-aware adaptation.
3Adaptability or versatility
If group paging handling procedure is added for MBS, then group-specific paging can be supported, but protocol complexity increases due to new message types and processing requirements
Solution Approach 1:
The patent implements group paging handling by extending existing paging mechanisms to serve multiple functions. The group paging procedure reuses fundamental paging structures while adding group-specific identification and handling capabilities. This approach allows the system to support group paging without requiring entirely new protocol mechanisms, thereby managing complexity while achieving versatility.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Accordingly, the embodiment herein is to provide a method and a User Equipment (100) for enhancing Medium Access Control (MAC) reset mechanism and other RRC procedures in a New Radio (NR) Multicast and broadcast service (MBS) communication. The method includes receiving a service from a network device (200), where the service includes an MBS multicast service and an MBS broadcast service. Furthermore, the method includes receiving a plurality of network messages from the network device. Furthermore, the method includes determining a plurality of events associated with the UE (100). Furthermore, the method includes performing the MAC reset mechanism in the MBS communication based on the service and/or the plurality of network messages, and/or the plurality of events.