Relay Station Resource Allocation Feedback Mechanism
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Solution Overview
Problem
In mobile multi-hop relay systems, existing resource allocation methods fail to reliably manage transmission errors and resource mismatches, leading to data loss when the relay station's resource allocation information is lost or mismatched.
Innovation Solution
A method involving a base station that allocates resources by transmitting a resource allocation message and checking for successful allocation, and includes error detection and retransmission requests for data received through an uplink dedicated channel, with the relay station retransmitting data upon request.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If unidirectional resource allocation message transmission is used from base station to relay station, then device complexity is reduced, but reliability of resource allocation deteriorates due to potential message loss and mismatch
Solution Approach 1:
The patent implements a feedback mechanism where the relay station sends an acknowledgment message back to the base station to confirm successful reception of the resource allocation message. This two-way communication ensures that the base station can verify whether the relay station has correctly received and understood the resource allocation, thereby preventing resource mismatch and improving allocation reliability without significantly increasing system complexity.
2Reliability
If error control mechanisms are added to the base station's data reception process, then transmission error control improves, but device complexity increases
Solution Approach 1:
The patent employs feedback through acknowledgment messages and retransmission requests. When the base station detects an error in received data, it sends a retransmission request to the relay station, which then retransmits the affected data packets. This feedback-based error control mechanism achieves reliable transmission without requiring complex forward error correction coding, thereby maintaining relatively simple device complexity while improving error control.
3Reliability
If retransmission capability is implemented for lost allocation messages, then resource allocation reliability improves, but loss of time increases due to retransmission delays
Solution Approach 1:
The patent implements preliminary action by having the relay station send an acknowledgment message immediately upon successful reception of the resource allocation message. This allows the base station to proactively verify allocation status and quickly detect any transmission failures. By detecting errors early through this preliminary acknowledgment step, the system can initiate retransmission promptly, minimizing the overall time loss compared to waiting for data transmission failures to manifest.
Data Source
AI summary
The present invention relates to a resource allocation and data receiving method. A resource allocation message for allocating a resource for an uplink dedicated channel is transmitted to a relay station, a receipt check message on the resource allocation message is received from the relay station, and successful resource allocation is checked.