Logical Channel Configuration for PTM/PTP Multicast Scheduling
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Solution Overview
Problem
In new radio (NR) networks, the scheduling of multicast services is complex due to multiple logical channels corresponding to a single temporary mobile group identifier (TMGI), leading to inefficiencies in both multicast and unicast service coordination.
Innovation Solution
User equipment (UE) obtains logical channel configuration information for both PTM and PTP legs, allowing it to determine appropriate LCIDs and RLC bearers for each TMGI, enabling efficient reception of multicast services by distinguishing between PTM and PTP legs based on specific configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple logical channels are configured for a single TMGI in NR multicast service, then the service can be transmitted through both PTM and PTP legs, but the scheduling complexity increases and coordination between multicast and unicast services becomes inefficient
Solution Approach 1:
The patent segments the logical channel configuration by introducing distinct configuration types (first configuration for PTM leg, second configuration for PTP leg) for each logical channel associated with a TMGI. This segmentation allows the UE to clearly distinguish between PTM and PTP configurations, reducing scheduling complexity while maintaining the ability to transmit through multiple legs simultaneously.
2Reliability
If separate LCIDs are assigned for PTM and PTP legs, then multicast and unicast services can be distinguished, but the signaling overhead increases
Solution Approach 1:
The patent applies local quality by configuring LCIDs differently based on the specific leg type (PTM or PTP). The first configuration type uses LCIDs suitable for PTM leg identification, while the second configuration type uses LCIDs suitable for PTP leg identification. This localized configuration approach ensures reliable service distinction while optimizing signaling overhead by not using uniform LCID allocation for all legs.
3Adaptability or versatility
If comprehensive logical channel configuration information is provided for all TMGIs, then UE can receive all multicast services, but the information processing load and signaling overhead increase
Solution Approach 1:
The patent implements dynamic configuration information provision by allowing the network to selectively provide first configuration information and/or second configuration information based on the UE's specific service requirements. The UE only processes configuration information relevant to its subscribed TMGIs and selected legs, reducing information processing load and signaling overhead while maintaining full adaptability for receiving all subscribed multicast services.
Data Source
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AI summary
This application discloses a logical channel configuration method and apparatus, and a device. The method includes: obtaining, by UE, at least one piece of logical channel configuration information corresponding to a first TMGI, where one piece of logical channel configuration information indicates any one of the following configurations: a first configuration: PTM LCID and/or PTM RLC bearer configuration; and a second configuration: PTP LCID and/or PTP RLC bearer configuration.