Relay Node Multi-Subframe Scheduling via R-PDCCH
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Solution Overview
Problem
Existing resource allocation methods for the Relay Physical Downlink Control Channel (R-PDCCH) in wireless communication systems are limited to scheduling resources for a single subframe, failing to efficiently manage resources for multiple subframes.
Innovation Solution
A method and system for a Relay Node (RN) to acquire and transmit data across multiple continuous or discontinuous subframes by receiving scheduling information on the R-PDCCH, using DCI formats and RRC signaling to allocate resources for multiple subframes, allowing flexible configuration and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing resource allocation methods for R-PDCCH are used, then scheduling for a single subframe is supported, but resource management efficiency for multiple subframes deteriorates
Solution Approach 1:
The patent combines multiple single-subframe scheduling operations into a unified multi-subframe scheduling operation. The R-PDCCH is enhanced to carry scheduling information that spans multiple subframes, allowing the relay node to allocate resources across multiple subframes simultaneously rather than sequentially, thereby improving resource management efficiency while maintaining adaptability.
Solution Approach 2:
The scheduling mechanism is designed to be universal, supporting both single-subframe and multi-subframe scheduling through the same R-PDCCH structure. The downlink assignment and uplink grant formats are extended to include multi-subframe resource allocation capabilities, making the system versatile without requiring separate mechanisms for different scheduling scenarios.
2Adaptability or versatility
If single subframe scheduling is used, then system complexity remains low, but resource utilization flexibility deteriorates
Solution Approach 1:
The multi-subframe scheduling is segmented into manageable components within the DCI structure. The resource allocation is divided into downlink resource grants and uplink resource grants, each with specific fields for subframe indication, resource block allocation, and modulation and coding scheme. This segmentation allows the system to handle multi-subframe complexity in an organized manner while maintaining clarity and reducing overall system complexity.
Solution Approach 2:
The scheduling system dynamically adapts between single-subframe and multi-subframe modes based on traffic requirements. The R-PDCCH can flexibly indicate the number of subframes to be scheduled, allowing the system to increase resource allocation flexibility when needed while maintaining low complexity during periods of simpler traffic patterns.
Data Source
AI summary
A relay node and a method thereof for transmitting data are provided in the present invention, which relates to the field of wireless communication technology. The method in the present invention includes: the relay node receiving data on multiple corresponding continuous or discontinuous downlink backhaul subframes according to the obtained scheduling information of downlink multiple subframes scheduling, and sending data on multiple corresponding continuous or discontinuous uplink backhaul subframes according to the obtained scheduling information of uplink multiple subframes scheduling. The technical solution of the present invention solves a problem of scheduling resources of multiple subframes for the relay node. Compared to a dynamic scheduling and semi-persistent scheduling method in the prior art, the technical solution of the present invention can more flexibly configure and use resources to ensure transmission of the backhaul link between a base station and the relay node.