HARQ Feedback Consolidation for Wireless Power Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face inefficiencies in power consumption due to the transmission of Hybrid Automatic Repeat Request (HARQ) feedback information, as the receiving end activates a transmission power amplifier even when no data is being transmitted, leading to unnecessary power usage.
Innovation Solution
The method involves transmitting HARQ feedback information for a group of received packets using a single feedback signal, allowing the receiving end to confirm packet reception status and request retransmissions efficiently, thereby reducing power consumption and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ feedback information is transmitted for each received packet, then transmission reliability is improved, but power consumption increases due to activation of transmission power amplifier
Solution Approach 1:
The patent combines HARQ feedback information for multiple received packets into a single feedback signal. Instead of transmitting separate feedback for each packet, the receiving end aggregates ACK/NACK information for multiple packets and transmits them together in one uplink transmission, thereby reducing the frequency of power amplifier activation while maintaining reliable feedback delivery.
Solution Approach 2:
The patent implements periodic feedback transmission where the receiving end transmits HARQ feedback information at specific intervals rather than continuously for each packet. By grouping packets and transmitting feedback periodically, the system reduces unnecessary power consumption while ensuring timely error detection and retransmission requests.
2Reliability
If HARQ feedback information is transmitted for each received packet, then transmission reliability is improved, but resource efficiency deteriorates due to unnecessary transmissions
Solution Approach 1:
The patent merges feedback for multiple packets into a single transmission resource. By consolidating ACK/NACK information for multiple downlink packets into one uplink feedback message, the system reduces the number of uplink resource allocations needed, thereby improving resource efficiency while maintaining complete feedback coverage for all transmitted packets.
3Reliability
If the receiving end transmits HARQ feedback information continuously, then error correction capability is improved, but power consumption increases due to activation of transmission power amplifier
Solution Approach 1:
The patent implements periodic feedback transmission where the receiving end transmits HARQ feedback information at specific intervals rather than continuously. By grouping packets and transmitting feedback periodically, the system reduces the activation frequency of the transmission power amplifier while ensuring that error correction capability is maintained through timely feedback at appropriate intervals.
Data Source
AI summary
An apparatus and a method for transmitting HARQ feedback information in a wireless communication system are provided. In so doing, the method for transmitting the HARQ feedback information in a receiving end includes confirming the number of packets received from a transmitting end, and when receiving a reference number of packets from the transmitting end, transmitting to the transmitting end a feedback signal comprising HARQ feedback information for the reference number of the packets.