Layer 2 Relay NAS Reselection Under Sidelink Congestion
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing non-access stratum (NAS) procedures, particularly in layer 2 relaying, which can lead to inefficiencies and congestion issues.
Innovation Solution
Implementing methods and apparatuses for non-access stratum procedures in connection with layer 2 relaying, including message flow diagrams and flow charts to optimize communication protocols and manage congestion effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If layer 2 relaying is implemented to extend network coverage, then network coverage and accessibility are improved, but congestion issues and inefficiencies in NAS procedures occur
Solution Approach 1:
The patent introduces a relay node as an intermediary entity between the remote UE and the network. The relay node forwards NAS messages and signaling between the remote UE and the network, enabling extended coverage while managing the relaying process. This intermediary approach allows the system to maintain NAS procedure efficiency despite the added relaying layer by providing dedicated message forwarding and congestion management at the relay node level.
2Ease of manufacture
If traditional NAS procedures are used in layer 2 relaying, then implementation simplicity is maintained, but congestion and inefficiencies arise
Solution Approach 1:
The patent segments the NAS procedure handling by introducing separate message flows for relayed communications. Different message types (e.g., registration requests, service requests) are handled through specific relayed NAS procedures. This segmentation allows the system to maintain simplicity in individual procedure implementations while improving overall communication efficiency through optimized message routing and congestion management at each segment level.
Solution Approach 2:
The patent implements dynamic congestion control mechanisms that adjust NAS procedure handling based on network conditions. The system can dynamically modify message forwarding behavior, implement back-off strategies, and adapt relay operations based on congestion levels. This dynamic approach enables the system to maintain efficiency under varying load conditions while preserving the fundamental simplicity of traditional NAS procedures.
Data Source
AI summary
Methods and apparatuses directed to non-access stratum procedures in connection with layer 2 relaying are provided. A method implemented in a first WTRU, may comprise: receiving, from a second WTRU, a first sidelink transmission comprising a first information indicating an amount of time for the first WTRU to refrain from transmitting, to the second WTRU; determining to reselect to a third WTRU responsive to receiving the first information and based on a second sidelink transmission from the third WTRU; reselecting or autonomous reselecting to the third WTRU; establishing a connection with the third WTRU; and transmitting, to the third WTRU, a third sidelink transmission comprising a second information indicating congestion as a cause for the reselection.