Physical Layer Status Report for Wireless Data Retransmission
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently retransmitting data to ensure reliable transmission, particularly for user equipment spaced apart from base stations, where data loss rates are high, and existing ARQ and HARQ methods do not effectively utilize radio resources to rapidly correct errors and retransmit data.
Innovation Solution
The method involves transmitting status report information from the receiver to the transmitter through the physical layer to rapidly confirm reception failures and retransmit data, utilizing RLC entities to ensure error-free data arrival, thereby enhancing Quality of Service (QoS) and efficiently using radio resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ARQ and HARQ methods are used to reduce data loss, then transmission reliability is improved, but radio resource efficiency deteriorates due to redundant retransmissions
Solution Approach 1:
The patent applies preliminary action by having the receiver proactively send status report information through the physical layer before the transmitter initiates retransmission. This allows the transmitter to anticipate which data packets need retransmission, reducing unnecessary retransmissions and improving radio resource efficiency while maintaining transmission reliability.
2Reliability
If status report information is transmitted through higher layers, then reception failure confirmation is achieved, but transmission speed deteriorates due to processing delays
Solution Approach 1:
The patent replaces the conventional higher-layer signaling mechanism with a physical layer-based status report transmission mechanism. By utilizing the physical layer for status report information, the system eliminates the processing delays associated with higher-layer protocols, thereby achieving both reliable reception failure confirmation and faster transmission speed.
Data Source
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AI summary
A method which can reduce loss in data transmission is provided. A data block is prepared in a high-level layer and the data block is transmitted in a low-level layer. Status report information associated with reception or non-reception of the data block is received through the low-level layer. When a receiver fails to receive data transmitted from a transmitter, the transmitter can rapidly recognize the reception failure and can retransmit the data.