Coordinating UE Selection in Distributed Antenna Systems
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Solution Overview
Problem
Wireless communication systems face challenges in maintaining quality of service, particularly for user equipment (UE) at the cell edge due to signal strength loss, bandwidth limitations, and interfering signals, and existing solutions fail to effectively form a user equipment-coordination set (UECS) when individual UEs cannot connect to a base station.
Innovation Solution
The formation of a UECS by multiple UEs acting as a group, where one UE coordinates joint transmission and reception of signals, using round-robin scheduling and selection criteria such as energy consumption and signal strength to determine the coordinating UE, improving signal quality and enabling communication with the base station without base station configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple UEs form a coordination set to improve signal quality, then the effective transmit power and signal quality are enhanced, but the device complexity and coordination overhead increase
Solution Approach 1:
The patent implements self-service by enabling UEs to autonomously form coordination sets and select coordinating UEs without base station intervention. The UEs independently execute selection criteria, establish group IDs, and manage resource allocation, thereby reducing coordination overhead while maintaining improved signal quality through distributed self-organization
Solution Approach 2:
The patent segments the coordination function by designating specific UEs as coordinating UEs for each coordination set, separating control functions from data transmission. This segmentation allows non-coordinating UEs to focus on signal transmission while coordinating UEs manage group synchronization and resource allocation, reducing overall system complexity
2Reliability
If UEs at cell edge form a coordination set, then communication reliability is improved, but the energy consumption increases due to joint transmission and reception
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the selection criteria for coordinating UEs based on energy consumption metrics. The system evaluates battery status, signal strength, and transmission capabilities to select optimal coordinating UEs, thereby managing energy consumption while maintaining communication reliability through adaptive parameter optimization
Solution Approach 2:
The patent implements multi-functionality by enabling participating UEs to simultaneously perform data transmission, signal reception, and coordination functions. Coordinating UEs execute multiple roles including group management, resource allocation, and synchronization, reducing the need for dedicated control infrastructure and optimizing energy utilization across the coordination set
3Adaptability or versatility
If UEs autonomously form coordination sets without base station configuration, then the adaptability to cell-edge conditions is improved, but the risk of interference and synchronization issues increases
Solution Approach 1:
The patent implements feedback mechanisms where coordinating UEs continuously monitor signal quality, interference levels, and synchronization status within the coordination set. Based on this feedback, the system dynamically adjusts resource allocation, selects optimal coordinating UEs, and manages group membership, thereby maintaining adaptability while mitigating interference and synchronization issues through closed-loop control
Solution Approach 2:
The patent applies dynamics by enabling flexible formation and dissolution of coordination sets based on real-time channel conditions. UEs can dynamically join or leave coordination sets, and coordinating UEs can be replaced when performance degradation is detected, allowing the system to adapt to changing cell-edge conditions while managing interference through dynamic reconfiguration
Data Source
AI summary
Methods, devices, systems, and means for selection of a coordinating user equipment, UE, in a user equipment-coordination set, UECS, that facilitates selection of the coordinating UE by the UEs in the UECS are described herein. Sharing of the role of coordinating UE by UEs in the UECS can be scheduled in a round-robin manner. Selection criteria can be used to determine which one or more UEs in the UECS will offer better performance in the role of coordinating UE.