Packet Reception Feedback to Cut Retransmission Overhead
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Solution Overview
Problem
Current packet transmission methods require frequent acknowledgment and retransmission of packets, leading to high consumption of air interface resources and reduced data transmission rates due to the need for extensive feedback mechanisms.
Innovation Solution
A communication method where a device feeds back successful reception of some packets that were initially received with errors, allowing the transmission of a reduced number of packets to be resent, thereby conserving air interface resources and increasing data transmission rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional packet transmission with individual ACK/NACK feedback is used, then packet transmission reliability is improved, but air interface resource consumption increases and data transmission rate decreases
Solution Approach 1:
The patent merges individual packet ACK/NACK feedback into a unified feedback mechanism. Instead of transmitting separate feedback signals for each packet, the system combines feedback information into a single feedback signal that indicates whether the packet was successfully received or needs retransmission, thereby reducing air interface resource consumption while maintaining reliability
Solution Approach 2:
The patent applies partial feedback by providing feedback only for packets that require attention. Rather than feedback for every single packet individually, the system provides consolidated feedback that covers multiple packets, reducing the total feedback overhead while ensuring that only necessary retransmissions occur
2Loss of information
If individual ACK/NACK feedback for each packet is transmitted, then packet reception status is accurately indicated, but air interface resources are excessively consumed
Solution Approach 1:
The patent combines multiple individual feedback signals into a single consolidated feedback signal. This merging approach preserves the essential information about packet reception status while dramatically reducing the number of signals transmitted over the air interface, thereby reducing resource consumption without losing critical information
Solution Approach 2:
The feedback signal is designed to serve multiple functions simultaneously. A single feedback signal can indicate reception status for multiple packets, provide error correction information, and trigger appropriate retransmission actions, making the feedback mechanism more efficient and less resource-intensive
3Reliability
If packets are resent based on NACK feedback, then transmission reliability is maintained, but air interface resources are consumed unnecessarily
Solution Approach 1:
The patent uses intelligent feedback mechanisms that provide the transmitter with accurate information about which packets were successfully received and which need retransmission. This feedback allows the transmitter to send retransmission signals only for packets that actually failed, avoiding unnecessary retransmissions and conserving air interface resources while maintaining reliability
Solution Approach 2:
The system changes the parameter of feedback granularity from individual packet level to consolidated packet level. By adjusting this parameter, the system reduces the number of feedback signals and subsequent retransmission operations, thereby reducing air interface resource consumption while maintaining transmission reliability through selective retransmission
Data Source
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AI summary
This application provides a communication method and a communication apparatus. The communication method provided in this application is applied to a first device. The method includes: receiving N packets sent by a second device; and sending first information to the second device, where the first information indicates that at least one packet is successfully received, the at least one packet is included in T packets that are unsuccessfully received in the N packets, and N and T are positive integers. According to the communication method provided in this application, air interface resources can be reduced, and a data transmission rate between the first device and the second device can be increased.