Persistent Allocation Error Recovery in Voice Packet Systems
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Solution Overview
Problem
In next-generation packet mobile communication systems, existing technologies face challenges in effectively recovering from reception errors of control messages during data transmission and reception using persistent allocation schemes, particularly impacting voice services between base stations and mobile terminals.
Innovation Solution
A method is introduced that includes a base station and terminal architecture with a radio resource allocation unit, control information generation, and transmission/reception mechanisms. The base station transmits control information and data, and upon failure to receive an acknowledgement, it retransmits the control information to ensure error recovery. The terminal receives control information to decode data and sends ACK messages for successful reception, enabling quick error recovery in persistent allocation schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If persistent allocation scheme is used for data transmission, then radio resource utilization efficiency is improved, but error recovery capability deteriorates
Solution Approach 1:
The patent applies preliminary action by transmitting control information (activation/deactivation messages) before the actual data transmission begins. This allows the terminal to be properly configured and prepared for persistent allocation, ensuring that when data is transmitted, the terminal is already ready to receive and process it correctly, thereby maintaining both efficiency and reliability
Solution Approach 2:
The patent implements feedback mechanisms where the terminal sends acknowledgment messages back to the base station regarding the receipt of control information. This feedback loop enables the base station to verify successful transmission of control messages and adjust subsequent data transmission accordingly, ensuring reliable error recovery while maintaining persistent allocation benefits
2Reliability
If control information is transmitted for each data packet, then error recovery is improved, but device complexity increases
Solution Approach 1:
The patent segments the control information into distinct activation messages and deactivation messages that can be transmitted independently. This segmentation allows for targeted error recovery - if an activation message is lost, only that specific message needs to be retransmitted rather than the entire control information set, reducing the complexity of error recovery operations
Solution Approach 2:
By transmitting control information in advance before data transmission begins, the patent establishes a clear framework and expectations for subsequent data packets. This preliminary configuration simplifies the terminal's processing requirements during actual data transmission, as it already has the necessary instructions configured, thereby reducing overall device complexity
Data Source
AI summary
Provided is a method of transmitting and receiving data using a persistent allocation scheme in order to effectively support a voice service between a base station and a mobile terminal in a packet based mobile communication system. When an error occurs in transmitting control information that indicates whether to use a radio resource using the persistent allocation scheme, the base station may retransmit the control information and thereby maintain a communication quality.