UE Coordination Set for Wireless Signal Quality
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Solution Overview
Problem
Conventional wireless communication systems face challenges in maintaining signal quality, particularly for user equipment (UE) located at the cell edge, due to factors like signal interference and distance, which degrades data transmission efficiency with the advent of faster data transmission speeds in 5G NR.
Innovation Solution
The formation of a user-equipment-coordination set (UE-coordination set) where multiple UEs jointly transmit and receive data intended for a target UE, acting similarly to a distributed antenna to enhance signal quality by aggregating and processing baseband samples, thereby increasing effective transmission power and receive power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional single-UE reception is used, then device complexity is low, but signal quality deteriorates at cell edge
Solution Approach 1:
Multiple UEs are merged into a coordination set where they jointly receive and process downlink signals. The UEs aggregate baseband samples and cooperatively decode data intended for the target UE, effectively combining their receiving capabilities to overcome individual signal quality limitations at the cell edge.
Solution Approach 2:
The reception function is segmented across multiple UEs in the coordination set. Each UE independently receives and processes a portion of the downlink signal, then contributes its baseband samples to the collective decoding process, distributing the reception task across multiple devices.
2Power
If joint transmission by multiple UEs is implemented, then effective transmission power increases, but coordination complexity increases
Solution Approach 1:
Multiple UEs merge their transmission resources to jointly transmit uplink data. By coordinating their transmission efforts, the coordination set achieves higher effective transmission power than any single UE could attain alone, improving uplink coverage and reliability.
Solution Approach 2:
A coordinating UE acts as an intermediary within the coordination set, managing the joint transmission process. The coordinating UE handles resource allocation, timing synchronization, and power coordination among member UEs, simplifying the overall coordination complexity through centralized management.
3Measurement precision
If baseband sample aggregation is performed, then decoding accuracy improves, but processing time increases
Solution Approach 1:
UEs perform preliminary processing of downlink signals by converting received RF signals to baseband samples before aggregation. This preliminary action prepares the data in advance for efficient collective decoding, reducing the actual processing time required when samples are aggregated from multiple UEs.
Data Source
AI summary
This document describes techniques and apparatuses for a user equipment (UE)-coordination set for a wireless network. In aspects, a base station specifies a set of UEs to form a UE-coordination set for joint transmission and reception of data intended for a target UE within the UE-coordination set. The base station selects one of the UEs within the UE-coordination set to act as a coordinating UE for the UE-coordination set and transmits a request message that directs the coordinating UE to coordinate the joint transmission and reception of the data intended for the target UE. Then, the base station transmits a downlink signal to each UE within the UE-coordination set. Each UE within the UE-coordination set demodulates and samples the downlink signal and then forwards the samples to the coordinating UE, which combines the samples and processes the combined samples to provide decoded data.