Multicast Paging via Group Common RNTI
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing paging for multicast and broadcast services (MBS) to user equipment (UEs) in inactive or idle states, particularly in ensuring timely and resource-effective initiation of MBS sessions.
Innovation Solution
A network node initiates an MBS session with UEs by transmitting an MBS session identifier through paging messages, and a core network (CN) facilitates communication between the radio access network (RAN) and the MBS network, providing session parameters and resource configurations to the RAN for broadcasting MBS data packets to UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station configures common frequency resource and PDCCH configuration for MBS, then the MBS data transmission capability is improved, but the device complexity increases due to additional configuration management
Solution Approach 1:
The patent applies universality by configuring common frequency resources and group common PDCCH that serve multiple UEs simultaneously for MBS. Instead of dedicating separate resources to each UE, the system uses shared resources that can be accessed by any UE in the MBS group, thereby improving transmission capability while avoiding the complexity of individual UE configuration management.
Solution Approach 2:
The patent segments the configuration management by introducing group-common RNTI that represents a group of UEs. Rather than managing configurations for each individual UE, the system segments the UE population into groups and manages configuration at the group level, reducing the overall configuration management complexity while maintaining efficient MBS transmission.
2Productivity
If the base station sends DCI to schedule PDSCH transmission for MBS, then the resource allocation efficiency is improved, but the signaling overhead increases
Solution Approach 1:
The patent merges the scheduling information for multiple UEs into a single DCI message that uses group-common RNTI. Instead of sending separate DCI to each UE individually, the system combines the scheduling information into one unified signal that all UEs in the MBS group can decode, thereby maintaining resource allocation efficiency while significantly reducing signaling overhead.
Solution Approach 2:
The patent uses copying by having multiple UEs share the same PDCCH configuration and resource allocation information. The scheduling DCI is effectively copied to multiple UEs through the group-common RNTI mechanism, allowing efficient resource allocation without repeating the signaling process for each UE, thus reducing overall signaling overhead.
Data Source
AI summary
A central node (CN) and a radio access network (RAN) can implement a method for managing paging for multicast and broadcast services (MBS). The method includes: receiving, from an MBS network, an identifier for an MBS session; transmitting, to a RAN, a message including the identifier for the MBS session; transmitting, to the RAN, one or more parameters associated with the MBS session; and transmitting, to the RAN, one or more MBS data packets to be broadcast to a user equipment (UE) in accordance with the one or more parameters.