Relay UE Selection Using Minimum Communication Range Discovery
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, there is a need for efficient relay user equipment (UE) selection to ensure reliable and stable communication links, especially in scenarios where multiple use cases require diverse optimization dimensions.
Innovation Solution
The proposed method involves a remote UE receiving discovery messages that include information about the minimum communication range (MCR) of a source UE. The remote UE then selects a relay UE based on this information, ensuring the selected relay UE has a signal strength equal to or greater than a preset value and is within the MCR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay UE selection is performed without considering MCR information, then relay selection can be done freely, but link quality becomes unstable and communication reliability decreases
Solution Approach 1:
The source UE performs preliminary actions by determining its MCR based on service requirements and including this information in discovery messages before relay selection occurs. This allows remote UEs to make informed selection decisions without complex real-time evaluations, improving reliability while maintaining simple selection procedures.
Solution Approach 2:
The patent introduces MCR as a new parameter in the relay selection process. By changing the selection criterion from simple signal strength to signal strength within a specified MCR range, the system achieves more stable link quality and communication reliability without significantly increasing overall system complexity.
2Productivity
If relay UE selection is performed without MCR consideration, then selection process is simple, but unnecessary relay selection occurs reducing efficiency
Solution Approach 1:
The source UE determines MCR in advance based on service requirements and includes it in discovery messages. This preliminary action allows remote UEs to quickly determine whether they fall within the acceptable range, avoiding unnecessary selection processes and improving overall efficiency.
Solution Approach 2:
The patent creates an equipotential selection environment where all remote UEs have equal access to MCR information through discovery messages. This allows them to independently and efficiently determine their eligibility without requiring complex coordination or additional time for evaluation.
3Measurement precision
If MCR is not included in discovery messages, then message size is small, but remote UE cannot determine if it is within service range
Solution Approach 1:
The source UE performs preliminary calculation of MCR based on service requirements and includes this pre-computed value in discovery messages. This allows remote UEs to precisely determine their service range eligibility without requiring the source UE to repeatedly calculate or communicate detailed service requirements.
Solution Approach 2:
The patent transforms complex service requirements into a single, easy-to-understand MCR parameter that can be included in discovery messages. This parameter change enables precise service range measurement while minimizing information loss, as the MCR encapsulates all necessary service constraints in one value.
Data Source
AI summary
One embodiment relates to a remote UE operation method in a wireless communication system, the method comprising steps of in which: a remote UE receives at least one discovery message; and a relay UE is selected on the basis of the at least one discovery message, wherein: the discovery message includes information related to the minimum communication range (MCR) of a source UE; the remote UE is included in the range of the MCR; and the selected relay UE has a signal strength greater than or equal to that of a preset value and is included in the range of the MCR.