5G MCCH Signaling and Reception for Shared MBS DRX
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Solution Overview
Problem
The existing wireless communication networks face challenges with excessive signaling overhead and power consumption due to per-service DRX configuration for multicast/broadcast services, especially in LTE SC-PTM, which becomes cumbersome with large numbers of services and complex configuration updates, and the introduction of low-latency services like V2X further complicates the management of DRX scheduling.
Innovation Solution
A method for DRX scheduling in 5G networks that involves receiving MCCH change notifications with bits indicating new session starts and configuration modifications, allowing UEs to determine their interest and adjust DRX configurations efficiently, and grouping services with common DRX configurations to reduce signaling and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If per-service DRX configuration is provided in signaling for multicast/broadcast services, then service reception reliability is improved, but signaling overhead increases excessively
Solution Approach 1:
The patent merges DRX configuration parameters into a single common DRX configuration that applies to multiple multicast/broadcast services simultaneously. Instead of providing separate DRX configurations for each service, the system uses one unified configuration that can be shared across multiple services, thereby significantly reducing signaling overhead while maintaining service reception reliability through the shared configuration parameters.
Solution Approach 2:
The common DRX configuration is designed to serve multiple functions by applying to multiple different multicast/broadcast services. The configuration includes universal parameters such as on-duration timer, inactivity timer, and DRX cycle that can be reused across services, making the signaling mechanism universally applicable rather than service-specific.
2Use of energy by moving object
If per-service DRX configuration is provided for each multicast/broadcast service, then service-specific power saving is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple service-specific DRX configurations into a single common DRX configuration that is managed and applied uniformly across all multicast/broadcast services. This merging reduces the complexity of configuration management at the UE side, as the device no longer needs to track and manage separate DRX parameters for each service, while still achieving power saving through the shared configuration.
3Speed
If MCCH modification period is reduced for low-latency services, then service responsiveness is improved, but power consumption increases
Solution Approach 1:
The patent introduces dynamic adjustment of the MCCH modification period based on service requirements. The system can flexibly configure the modification period length, allowing it to be reduced for low-latency services that require faster responsiveness. This dynamic configuration enables the network to optimize between responsiveness and power consumption by adjusting the modification period according to actual service needs rather than using a fixed period.
Data Source
AI summary
A method for MCCH acquisition in a 5G wireless network (1000) by a UE (100) includes: receiving, by the UE, a MCCH change notification from the gNodeB over a PDCCH. Further, the method includes detecting whether at least one of the UE is interested to receive a new MBS and the UE is already receiving an MBS. Further, the method includes determining the start of the new MBS session for the new MBS by reading the first bit of the MCCH change notification in response to detecting that the UE is interested to receive the new MBS, or determining the modification to the MBS session configuration of the ongoing MBS session by reading the second bit of the MCCH change notification in response to detecting that the UE is already receiving the MBS.