Relay UE Selection Using Battery Status and Charging Data
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Solution Overview
Problem
In wireless communication systems, efficiently selecting a relay user equipment (UE) that can handle congestion and optimize battery life is challenging, as existing methods often rely solely on signal strength without considering battery status or charging conditions.
Innovation Solution
A method where a User Equipment (UE) receives battery status information from multiple Relay UEs, including estimated residual battery life and charging status, and selects one based on this information, especially during congestion, by requesting additional details when necessary to ensure optimal power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay UE selection is based only on signal strength, then the selection process is simple, but system performance degrades under congestion and battery efficiency is poor
Solution Approach 1:
The patent applies preliminary action by having relay UEs report their battery status information (residual battery life, charging status) in advance before being selected. This allows the selecting UE to make informed decisions about relay selection based on both signal strength and battery conditions, preventing performance degradation before it occurs rather than reacting to congestion after it happens.
Solution Approach 2:
The patent implements feedback mechanisms where relay UEs continuously report their battery status to potential selecting UEs. The selecting UE uses this feedback information to dynamically adjust its relay selection decisions, choosing relays with sufficient battery life or charging capability when congestion is detected, thereby maintaining system performance through informed decision-making.
2Measurement precision
If additional battery status information is requested during congestion, then relay selection accuracy improves, but communication overhead increases
Solution Approach 1:
The patent applies partial action by requesting additional battery status information selectively rather than continuously. When congestion is detected, the selecting UE requests specific additional information (charging status, residual battery life) from candidate relay UEs. This partial information gathering achieves sufficient selection accuracy without the excessive overhead of continuous full-status reporting from all relays.
Solution Approach 2:
The patent changes the parameter set based on conditions: under normal conditions, only basic signal strength is considered, but when congestion is detected, additional parameters (battery status, charging status) are requested. This dynamic parameter adjustment improves selection accuracy when needed while minimizing communication overhead during normal operation.
3Adaptability or versatility
If relay UEs with low battery are selected, then available relays increase, but system reliability decreases due to potential relay failure
Solution Approach 1:
The patent changes the selection criteria parameters by incorporating battery status and charging status alongside signal strength. This allows the system to identify relays that are currently available but have low battery, while also identifying relays with sufficient power or charging capability. The selecting UE can then choose from a broader range of available relays without compromising reliability, as it can avoid selecting relays that are likely to fail due to power constraints.
Data Source
AI summary
The present invention is directed to a method and an apparatus for use in a wireless communication system. Specifically, the present invention is directed to a method comprising: receiving a plurality of first battery status information from a plurality of Relay UEs, wherein each first battery status information includes an estimated time length of residual battery life of a respective Relay UE; if a congestion is recognized, transmitting a first request signal for requesting additional information about battery status to the plurality of Relay UEs; as a response to the first request signal, receiving a plurality of second battery status information from the plurality of Relay UEs, wherein each second battery status information includes a charging status of a respective Relay UE; and selecting one of the plurality of Relay UEs based on the first and second battery status information, and an apparatus therefore. A UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, a base station or a network.