UE-to-UE Relay ID Configuration for Lower Header Overhead
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Solution Overview
Problem
Existing wireless communication systems face challenges in identifying the transmitting and receiving UEs in UE-to-UE relay operations, leading to inefficiencies and increased header overhead in data transmission.
Innovation Solution
The proposed solution involves configuring ID information in the adaptation layer headers of messages transmitted between source and target remote UEs through a relay UE, ensuring accurate identification and reducing header overhead by using the same or different ID values for the target and source UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional MAC layer ID configuration is used in UE-to-UE relay operations, then the transmitting and receiving UEs can be identified, but the header overhead increases and communication efficiency decreases
Solution Approach 1:
The patent changes the ID parameter configuration by allowing the same L2 ID to be used for both source and destination UEs in relay operations, rather than requiring distinct MAC addresses. This parameter change reduces header overhead while maintaining identification capability through adaptation layer information.
Solution Approach 2:
The adaptation layer acts as an intermediary that carries source and destination UE information, enabling identification without requiring traditional MAC layer address configuration. This mediator layer resolves the contradiction by providing identification functionality without the overhead of conventional MAC address handling.
2Measurement precision
If distinct MAC addresses are configured for source and target UEs, then accurate identification is achieved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent merges the source and destination UE identification into a single L2 ID configuration, eliminating the need for separate MAC address management. The adaptation layer combines both identification functions, reducing configuration complexity while maintaining accurate UE identification through the unified ID approach.
3Productivity
If conventional relay messaging is used, then messages can be transmitted between remote UEs, but the header size increases reducing transmission efficiency
Solution Approach 1:
The patent extracts the identification function from the MAC layer headers and relocates it to the adaptation layer. This extraction removes unnecessary header overhead from the MAC layer while preserving the essential identification capability, thereby reducing overall header size and improving transmission efficiency.
Data Source
AI summary
One embodiment is an operation method of a relay UE related to a user equipment (UE)-to-UE relay in a wireless communication system in which the relay UE establishes a connection for UE-to-UE relay between a source remote UE and a target remote UE, receives a first message to be transmitted from the source remote UE to the target remote UE, and transmits a second message based on the first message to the target remote UE, wherein the header of an adaptation layer of the first message received from the source remote UE includes ID information for identifying the target remote UE, and the header of an adaptation layer of the second message to be transferred to the target remote UE includes ID information for identifying the source UE.