Multi-Node Feedback Signal Transmission in Wireless Systems
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Solution Overview
Problem
In multi-node wireless communication systems, there is a need for an efficient method to transmit feedback signals from terminals to base stations, particularly in systems with high node density, where coordinated operation between nodes enhances system performance.
Innovation Solution
A method and device for transmitting feedback information in a multi-node system, where a terminal requests resource assignment information from a base station, receives necessary information, and transmits feedback related to node reception signal levels, including the number and identification of nodes with predetermined signal strengths, along with scheduling or bandwidth requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback information is transmitted separately from resource assignment requests, then the base station can process resource assignment and feedback independently, but the transmission time and signaling overhead increase
Solution Approach 1:
The patent combines feedback information transmission with resource assignment request transmission by multiplexing them on the same physical uplink channel (PUCCH or PUSCH). This allows the terminal to send both the scheduling request/bandwidth request and the feedback information (such as CQI, PMI, RI) simultaneously, reducing the total transmission time and signaling overhead while maintaining reliable delivery of both information types
2Productivity
If feedback information includes detailed signal level data from multiple nodes, then the base station can optimize resource allocation more effectively, but the amount of feedback data and processing complexity increase
Solution Approach 1:
The patent enables the base station to identify which specific nodes are providing strong signals to the terminal by including node identification information along with signal level measurements in the feedback. This allows the base station to focus resource allocation decisions on the relevant local nodes rather than processing data from all nodes uniformly, optimizing resource allocation while managing complexity through selective processing
3Loss of information
If the terminal monitors all nodes in the multi-node system, then the feedback information becomes more comprehensive, but the terminal's measurement and processing burden increases
Solution Approach 1:
The patent extracts and reports only the most relevant feedback information - specifically focusing on nodes with strong signal levels and their corresponding quality metrics. Rather than requiring the terminal to process and report data from all nodes equally, the system extracts the essential information about the dominant nodes, achieving comprehensive feedback where needed while reducing the terminal's processing burden by not requiring exhaustive monitoring of all nodes
Data Source
AI summary
The present invention relates to wireless communication, and particularly, to a method and device for transmitting a feedback signal of a terminal in a multi-node system. The method for a terminal to transmit feedback information in a multi-node system including a plurality of nodes and a base station for controlling same includes: transmitting first information upon the request of resource allocation so as to give notice that there is information to be transmitted to the base station; receiving information from the base station at the request for the transmission of second information necessary for the resource allocation; and transmitting the requested second information to the base station. The feedback information may be transmitted to the base station together with the first information or the second information.