Uplink Data Channel Mapping for Cooperative Wireless Communication
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Solution Overview
Problem
In wireless communication systems, especially in the context of multi-antenna technologies, the efficiency of closed-loop precoding, Adaptive Modulation and Coding (AMC), and channel-sensitive scheduling schemes is compromised due to delayed channel state information, leading to suboptimal performance, particularly for users at the edge of cell coverage areas.
Innovation Solution
A method for transmitting and receiving physical uplink data channel mapping information between different transmission/reception points, allowing for cooperative communication by mapping physical uplink data channels to wireless resources based on specific channel information, thereby improving channel estimation and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel state information is reported from receiver to transmitter, then transmission efficiency is improved through closed-loop precoding, AMC, and channel-sensitive scheduling, but transmission delay occurs causing deterioration of these schemes
Solution Approach 1:
The patent applies preliminary action by having the receiver pre-calculate and store channel mapping information for multiple transmission points before actual data transmission. When cooperative communication is needed, the transmitter can immediately retrieve pre-computed channel mapping information without waiting for real-time channel state reporting, thus eliminating delay while maintaining transmission efficiency
Solution Approach 2:
The receiver performs preliminary channel estimation and calculates channel mapping information in advance for multiple transmission points. This pre-computation allows the system to switch between transmission points without real-time channel state feedback delay, resolving the contradiction between maintaining transmission efficiency and avoiding time loss
2Reliability
If users at cell boundary receive service from serving base station, then coverage is maintained, but transmission rate deteriorates due to interference from other base stations
Solution Approach 1:
The patent introduces another transmission point as an intermediary for cooperative communication. Instead of the boundary user directly communicating with the serving base station under interference, the system uses a second transmission point with better channel conditions as a mediator, allowing the user to maintain coverage while achieving higher transmission rates through the intermediary path
Solution Approach 2:
The system changes the transmission point parameter dynamically. For boundary users, instead of fixed serving base station, the system selects between multiple transmission points based on channel conditions. By changing which transmission point serves the user, the system maintains coverage reliability while improving transmission rate through cooperative communication
Data Source
AI summary
The present disclosure relates to a wireless communication system. The wireless communication system includes a transmission and reception point and a terminal. The transmission and reception point and the terminal perform cooperative communication.