Relay Node R-PDCCH Reception via Backhaul Subframe Segmentation
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Solution Overview
Problem
Current wireless communication systems lack a detailed frame structure for transmitting control information between a relay node and an eNodeB, which hinders efficient communication and service coverage extension in next-generation mobile communication systems.
Innovation Solution
A method and device for a relay node to receive control information from an eNodeB, involving the reception of R-PDCCH information, search for assigned R-PDCCH, and receive grants including R-PDSCH and R-PUSCH resource allocation information, starting from specific symbols in the downlink backhaul subframe, with configuration by physical resource blocks and higher layer signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a relay node is introduced to extend service coverage and improve data throughput, then service coverage area and data throughput are improved, but the complexity of the frame structure for control information transmission increases
Solution Approach 1:
The downlink backhaul subframe is segmented into multiple slots, with the first slot containing control information (R-PDCCH) and subsequent slots containing data information. This segmentation allows the relay node to efficiently separate control signaling from data transmission, reducing the complexity of processing the overall frame structure while extending service coverage.
Solution Approach 2:
Control information is transmitted in advance in the first slot of the downlink backhaul subframe before data transmission occurs in subsequent slots. This preliminary action allows the relay node to receive and process control information (such as resource allocation and scheduling) before the actual data transmission, simplifying the overall reception process and improving efficiency.
2Productivity
If control information is transmitted without a detailed frame structure, then device complexity is reduced, but communication efficiency and reliability deteriorate
Solution Approach 1:
The frame structure is segmented into control regions (first slot with R-PDCCH) and data regions (subsequent slots with R-PDSCH/R-PUSCH). This segmentation provides a clear, efficient structure for communication without excessive complexity, as each segment has a specific function that simplifies processing.
Solution Approach 2:
Control information is preliminarily transmitted in the first slot to establish communication parameters before data transmission. This preliminary action improves communication efficiency by allowing the relay node to be properly configured before receiving or transmitting data, without requiring a complex overall frame structure.
3Productivity
If control information is received from earlier symbols in the subframe, then data throughput is improved, but the reliability of control information reception deteriorates due to potential interference
Solution Approach 1:
The downlink backhaul subframe is segmented such that the first slot is dedicated to control information transmission and subsequent slots to data transmission. This segmentation ensures that control information is transmitted in a dedicated region with appropriate protection, improving reliability while still allowing data throughput to be maximized in the remaining slots.
Data Source
AI summary
The present invention relates to a relay node device for receiving control information from a base station and a method therefor. The relay node device according to the present invention comprises: a receiver, which receives information about an area where a relay-physical downlink control channel (R-PDCCH), the channel for transmitting control information for the relay node from a base station, is allocated; a processor, which searches for at least one R-PDCCH for the relay node based on the R-PDCCH allocation information received; and an R-PDCCH receiver, which receives the at least one R-PDCCH from the fourth symbol of the first slot in a downlink backhaul subframe of the area where the at least one R-PDCCH searched for by the processor has been allocated.