Multi-Transmission Point Downlink Data Reception in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving uplink/downlink data between user equipment and multi-cell or multi-transmission points, particularly in supporting high data traffic, increased transmission rates, and low latency while maintaining energy efficiency.
Innovation Solution
A method for user equipment to receive downlink data from multiple transmission points by processing downlink scheduling information and transmitting acknowledgment responses, utilizing a radio frequency unit and processor to manage data from multiple sources, with options for same or different data transmission and joint or independent encoding of acknowledgment responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If downlink data is transmitted from multiple transmission points to user equipment, then data transmission reliability is improved, but system complexity increases
Solution Approach 1:
The patent segments the downlink data transmission by dividing it into multiple transmission points (first TP, second TP, etc.), where each TP transmits data independently through separate physical channels. This segmentation allows the system to achieve diversity gain and improve reliability without requiring complex coordination between transmission points, as each operates semi-independently with its own scheduling and resource allocation.
Solution Approach 2:
The user equipment is designed with multi-functionality to handle data from multiple transmission points simultaneously. It can receive, process, and acknowledge data from different TPs using the same receiving mechanisms and protocols, making the UE universally capable of operating in multi-TP environments without requiring TP-specific processing for each transmission point.
2Measurement precision
If acknowledgment responses are transmitted to multiple transmission points, then data transmission accuracy is improved, but signaling overhead increases
Solution Approach 1:
The acknowledgment response is segmented and directed to specific transmission points based on which TP transmitted the data. Each TP receives its own dedicated ACK/NACK feedback, allowing for precise transmission accuracy measurement for each TP-UE link while maintaining organized, separate signaling paths that reduce overall overhead compared to centralized feedback mechanisms.
3Productivity
If downlink scheduling information is received from multiple transmission points, then resource allocation efficiency is improved, but processing complexity at user equipment increases
Solution Approach 1:
Downlink scheduling information is segmented by transmission point, with each TP providing its own scheduling assignments for its allocated resources. The UE processes scheduling information from each TP separately, associating each scheduling message with the corresponding TP's resource allocation. This segmentation allows efficient resource utilization across multiple TPs while keeping processing complexity manageable through organized, TP-specific handling of scheduling messages.
Data Source
AI summary
Disclosed are a method for transmitting and receiving uplink/downlink data in a wireless communication system, and an apparatus therefor. Specifically, a method for receiving downlink data from multiple transmission points (TPs) by a terminal in a wireless communication system may comprise the steps of: receiving downlink scheduling information from one or more of a first TP and a second TP; receiving first downlink data from the first TP and second downlink data from the second TP, on the basis of the downlink scheduling information; and transmitting, to the first TP and the second TP, a first acknowledgment/non-acknowledgment (ACK/NACK) response to the first downlink data and a second ACK/NACK response to the second downlink data, respectively.