Sidelink MAC Procedure Management for Wireless Reliability
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Solution Overview
Problem
Current wireless communication systems lack adequate management mechanisms for sidelink communications, particularly for User Equipment (UE) operating with multiple radio access interfaces, which can impact the quality of service and reliability of direct communications such as Device-to-Device (D2D) and Vehicle-to-Everything (V2X) services.
Innovation Solution
A User Equipment (UE) is configured to perform a Medium Access Control (MAC) procedure on one radio access interface for a sidelink connection and can release or cancel this procedure based on triggering events associated with another radio access interface, ensuring seamless operation and minimizing disruptions during MAC reset operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a MAC procedure is performed on a first radio access interface for a sidelink connection, then the direct communication between UEs can be established, but the MAC procedure may be disrupted or cancelled when a MAC reset operation is triggered on a second radio access interface, impacting service continuity
Solution Approach 1:
The patent segments the MAC entity into multiple independent MAC instances, each associated with a specific radio access interface. This allows the MAC procedure on the first radio access interface to operate independently from the MAC reset operation on the second radio access interface, preventing disruption and maintaining service continuity while managing complexity through modular organization
Solution Approach 2:
The patent implements a unified MAC management mechanism that handles multiple radio access interfaces through a single MAC entity or coordinated MAC instances. This multi-functional approach allows the system to manage sidelink communications across different interfaces (e.g., LTE and NR) while maintaining consistent MAC procedures and avoiding conflicts during reset operations
2Duration of action of stationary object
If the MAC procedure continues during a MAC reset operation, then service continuity is maintained, but conflicts may arise between the ongoing MAC procedure and the reset operation on different radio access interfaces
Solution Approach 1:
The patent implements dynamic MAC instance management where each MAC instance can be independently activated, suspended, or reset based on the state of its associated radio access interface. When a MAC reset is triggered on one interface, only the corresponding MAC instance is affected, while other MAC instances continue operating dynamically without interruption, maintaining service continuity and avoiding conflicts
Data Source
AI summary
A method of wireless communication is provided. The method includes performing a first Medium Access Control (MAC) procedure on a first radio access interface for a first Sidelink (SL) connection between the UE and a target UE of a first destination on a second radio access interface; and releasing or canceling the first MAC procedure in a case that the UE is indicated to perform an MAC reset operation associated with the first SL connection based on at least one triggering event associated with the target UE and the second radio access interface.