Sidelink MAC Control Elements With Routing for UE Relay Traffic
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Solution Overview
Problem
There is a need for improved communication techniques in wireless networks, particularly in NR and LTE technologies, to enhance sidelink communications between user equipments (UEs) and support various wireless communication services with different latency and reliability requirements.
Innovation Solution
The implementation of medium access control (MAC) control elements (CEs) for sidelink communications, including the preparation and transmission of MAC-CEs on sidelink or cellular links, with routing information to manage and activate or deactivate resources based on sidelink communications between UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MAC-CEs are transmitted on sidelink or cellular link with routing information, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The MAC-CE transmission system is segmented into distinct components: routing information fields, source/destination identification, and MAC-CE payload. This segmentation allows each component to be processed independently, improving reliability through targeted error handling while managing device complexity by breaking down the overall processing task into manageable segments.
Solution Approach 2:
Routing information acts as an intermediary element between the MAC-CE and the network nodes. This intermediary contains source and destination identifiers that enable proper routing without requiring complex peer-to-peer addressing logic at each device, thereby improving communication reliability while keeping device complexity manageable.
2Productivity
If routing information is provided for MAC-CE, then resource management is improved, but information processing overhead increases
Solution Approach 1:
Routing information including source and destination identifiers is prepared and attached to MAC-CEs in advance, before transmission. This preliminary action enables receiving nodes to pre-process and categorize incoming MAC-CEs based on routing information, improving resource management efficiency by enabling proactive resource allocation rather than reactive processing.
Solution Approach 2:
The routing information includes only the essential fields needed for resource management (source identifier, destination identifier, and routing path), providing sufficient information for efficient resource allocation without excessive processing overhead. This partial information approach balances the need for comprehensive resource management with the constraint of minimizing information processing requirements.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for conveying information via medium access control (MAC) control element (CEs). In some cases, the MAC-CEs may relate to sidelink communications between two user equipments (UEs). A first wireless node may send the first MAC-CE on at least one of a sidelink or a cellular link and provide providing routing information for the first MAC-CE. The routing information may indicate, for example, a source node, a destination node, or a transit route through one or more nodes. The routing information may also indicate whether traffic sent with the first MAC-CE is relayed traffic or traffic originating at the first node.