Mobile Link Adaptation with In-Resource Channel-State Signaling
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Solution Overview
Problem
Existing mobile communication systems face delays in reflecting the dynamic changes in radio channel states during resource allocation, leading to inefficiencies in link adaptation.
Innovation Solution
A transmitting node-based link adaptation method that includes determining and transmitting link adaptation information within the allocated resource, allowing for accurate reflection of radio channel states, thereby enhancing resource utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station determines link adaptation information and transmits it to the terminal, then the terminal can transmit data based on allocated resources, but a delay occurs between measuring the radio channel and transmitting data
Solution Approach 1:
The terminal autonomously determines link adaptation information based on its own radio channel measurements and transmits this information along with data in the allocated resource. This self-service approach eliminates the need for base station processing of link adaptation determination, thereby reducing delay while maintaining accurate channel state reflection.
2Productivity
If the terminal transmits data based on resource allocation information from the base station, then resource utilization can be managed, but the delay between channel measurement and data transmission reduces efficiency
Solution Approach 1:
The terminal independently determines link adaptation information based on current radio channel conditions and transmits it with data. This eliminates the sequential dependency where the base station must first determine and transmit resource allocation before the terminal can adapt to channel conditions, thereby improving productivity by enabling simultaneous resource utilization and channel adaptation.
3Adaptability or versatility
If the base station manages radio resources and determines transmission schemes, then centralized control is maintained, but the system cannot rapidly reflect dynamic changes in radio channel state
Solution Approach 1:
The terminal autonomously determines link adaptation information based on real-time radio channel measurements and transmits it with data. This distributes the adaptation function from the base station to the terminal, enabling rapid response to channel changes without increasing overall system complexity, as the terminal already possesses the necessary measurement and processing capabilities.
Data Source
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AI summary
A method for operating a transmission node performing link adaptation in a mobile communication network may comprise the steps of: receiving, from a resource allocation node, resource allocation information for a resource for transmission of data; determining link adaptation information and transmitting the determined link adaptation information to a reception node; and on the basis of the determined link adaptation information, transmitting the data to the reception node. Therefore, link adaptation accurately reflecting a radio channel state between a base station and terminals can be performed, thereby enabling efficient use of a radio resource.