R-PDCCH Multi-Carrier Aggregation for Relay Node Throughput
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Solution Overview
Problem
In LTE Rel-10, the relay node can only support single-carrier transmission on the Un link, leading to throughput restrictions and bottlenecks in system performance, as existing technologies do not support multi-carrier aggregation for R-PDCCH transmission between the base station and relay node.
Innovation Solution
Implementing a method and device for R-PDCCH transmission in the scenario of carrier aggregation, where the relay node receives and decodes multiple aggregated component carriers carrying R-PDCCH, allowing for blind decoding and resource acquisition to enable multi-carrier scheduling and information transmission between the base station and relay node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single-carrier transmission is used on the Un link as in LTE Rel-10, then the relay node can maintain compatibility with existing LTE Rel-10 standards, but the throughput and system performance are restricted due to the inability to support multi-carrier aggregation
Solution Approach 1:
The patent changes the parameter of carrier aggregation support from single-carrier to multi-carrier by introducing separate R-PDCCH search space configurations for each component carrier. The relay node is enabled to perform blind decoding on multiple component carriers independently, with each carrier having its own search space parameters (numberOfCandidates, searchSpaceSetIndex) that can be separately configured by the donor eNB, thereby achieving multi-carrier throughput improvement while maintaining LTE Rel-10 compatibility
Solution Approach 2:
The patent segments the R-PDCCH search space into separate configurations for each component carrier. Instead of a unified search space, each component carrier has its own search space parameters including starting position, number of candidates, and resource allocation. This segmentation allows the relay node to independently decode control information on each carrier, enabling multi-carrier aggregation while keeping each carrier's processing compatible with existing LTE Rel-10 standards
2Productivity
If multi-carrier aggregation is introduced to improve throughput on the Un link, then the system performance can be enhanced, but existing LTE Rel-10 standards and protocols do not support such functionality
Solution Approach 1:
The patent makes the existing LTE Rel-10 R-PDCCH mechanism universal by extending it to support multiple component carriers. The same blind decoding and search space configuration mechanisms used in single-carrier mode are generalized to multi-carrier operation. Each component carrier uses the same R-PDCCH structure and decoding procedures as defined in LTE Rel-10, but with separate configurable parameters, allowing the system to maintain standard compatibility while achieving multi-carrier functionality
Solution Approach 2:
The patent introduces dynamic configurability for R-PDCCH search spaces on each component carrier. The donor eNB can dynamically adjust parameters such as the number of candidates, search space set index, and resource allocation for each carrier based on traffic conditions and channel quality. This dynamic adaptation allows the system to optimize performance for multi-carrier aggregation while maintaining compatibility with the static configuration expectations of LTE Rel-10 standards
Data Source
AI summary
Disclosed are a method and device for R-PDCCH transmission in the scenario of carrier aggregation. By way of applying the technical solution of the embodiments of the present invention, multi-carrier aggregation transmission is supported between the relay node and the base station. The base station sends a component carrier carrying the R-PDCCH to the relay node and schedules the resources in each component carrier by way of the R-PDCCH carried in the component carrier. Thus what is achieved is that the base station communicates with the relay node by way of a plurality of aggregated component carriers, enabling the link transmission resources between the base station and the relay node to support multi-carrier PDCCH scheduling, improving the transmitting capacity of the link between the base station and the relay node, and improving the system performance.