Layer 2 Entity Management for 5G Multicast Broadcast Services
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Solution Overview
Problem
Current 5G mobile communication systems lack clear guidelines for Layer 2 operations during Multicast Broadcast Services (MBS), leading to uncertainty in when to re-establish or reset L2 entities, especially in cases of UE mobility and disconnected modes where dedicated signaling is unavailable.
Innovation Solution
A User Equipment (UE) is designed to perform L2 operations in response to information received from the network or upon mobility, with specific triggers for changes in configuration, reconfigurations, and bearer establishment, allowing for flexible operation without additional signaling in idle, inactive, or connected modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clear guidelines for Layer 2 operations during MBS are implemented, then reliability of MBS reception is improved, but device complexity increases due to additional operational rules
Solution Approach 1:
The patent changes the operational parameters of L2 entities by introducing new configuration parameters that indicate when re-establishment or reset operations should be performed. These parameters are conveyed through RRC signaling, allowing the network to control UE behavior without hardcoding complex decision logic in the UE, thus improving reliability while managing complexity through parameterization rather than structural complexity
Solution Approach 2:
The patent enables UEs to autonomously determine when to perform L2 operations by providing them with clear guidelines and configuration parameters. The UE uses its own judgment based on received information and pre-configured rules to decide when to re-establish or reset L2 entities, eliminating the need for continuous network control signaling and reducing overall system complexity while maintaining reliability
2Measurement precision
If dedicated signaling is used to control L2 operations, then precision of operation control is improved, but loss of information increases in disconnected modes where dedicated signaling is unavailable
Solution Approach 1:
The patent applies preliminary action by configuring UEs with all necessary operation control information before disconnected modes begin. The network provides configuration parameters and guidelines in advance while the UE is in connected mode, storing this information for later use during idle or inactive states. This ensures control precision is maintained without requiring real-time dedicated signaling during disconnected modes
Solution Approach 2:
The patent introduces configuration parameters as intermediaries that carry control information from the network to the UE. These parameters act as a mediator that encapsulates the essential control decisions, allowing the UE to execute precise L2 operations based on pre-delivered information without needing continuous direct network control, thus bridging the information gap in disconnected modes
3Loss of time
If flexible operation without additional signaling is allowed, then loss of time is reduced, but reliability of L2 operations may deteriorate
Solution Approach 1:
The patent enables flexible operation by having the network pre-configure UEs with all necessary information and rules for L2 operations before the UE enters disconnected modes. The UE can then autonomously execute operations without additional signaling, reducing time loss while maintaining reliability through the quality and completeness of the pre-provided configuration information
Solution Approach 2:
The patent implements self-service by enabling UEs to independently perform L2 operations based on pre-configured rules and received information. The UE uses its own judgment and stored configuration to determine when and how to perform re-establishment or reset operations, eliminating the need for additional network signaling while maintaining operational reliability through autonomous decision-making based on reliable pre-provided information
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Disclosed is a User Equipment, UE, operable with a telecommunication network, arranged to perform an operation associated with a Level 2, L2, entity involved with Multicast Broadcast Services, MBS, wherein the UE is arranged to perform the operation in response to one of: i) information received or acquired from the network or upon UE mobility; and ii) information provided in a message field received from the network, explicitly to trigger the UE to perform the operation.