Layer 3 Relay Service Interruption Minimization
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Solution Overview
Problem
Current wireless communication systems face challenges in minimizing service interruptions during device-to-device-based user-equipment-to-network relays, particularly when user equipment (UE) moves from in-coverage to out-of-coverage or vice versa, lacking standard methods to maintain seamless network connections.
Innovation Solution
The method involves selecting a Layer 3 relay for remote user equipment, sending indications to serving access nodes, and configuring extended discontinuous reception periods to minimize service interruptions by switching between Layer 3 relay and cellular access modes, ensuring continuous network connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ProSe UE-to-Network relay is used to maintain network connection when UE moves between coverage areas, then service continuity is improved, but service interruption during relay switching cannot be minimized due to lack of standard methods
Solution Approach 1:
The patent applies preliminary action by having the UE indicate to the access node whether service interruption minimization is needed before the actual relay switching occurs. This advance indication allows the network to prepare appropriate handling procedures, enabling faster relay switching and minimizing service interruption when UE moves between in-coverage and out-of-coverage areas.
2Adaptability or versatility
If relay switching is performed without standardized procedures, then adaptability to different movement scenarios is improved, but device complexity increases due to lack of standardized control mechanisms
Solution Approach 1:
The patent implements universality by creating a standardized indication mechanism that works across different movement scenarios (in-coverage to out-of-coverage and vice versa). The cause information element serves as a universal signal that can be sent in various RRC messages, providing a multi-functional solution that handles different relay switching scenarios through a common standardized procedure, thereby reducing device complexity.
Data Source
AI summary
Various communication systems may benefit from minimization of service interruption. For example, certain wireless communication systems may benefit from support for minimization of service interruption with device-to-device-based user-equipment-to-network relay. A method can include determining that a layer 3 relay is selected for a remote user equipment. The method can also include sending an indication to a serving access node about the relay selection.