Relay Dedicated R-PDCCH Configuration via OFDM Symbol Mapping
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Solution Overview
Problem
Existing relay node systems in LTE-A communication lack a detailed design for dedicated R-PDCCH, leading to challenges in determining the starting location of R-PDCCH without blind decoding, which affects efficient control channel management and resource allocation.
Innovation Solution
The method involves configuring and detecting dedicated control channels by pre-configuring the number of OFDM symbols occupied by R-PDCCH and mapping it to resource elements via frequency domain priority, using R-PCFICH to indicate the number of OFDM symbols, and enabling blind detection to determine the start position of R-PDCCH, ensuring each relay node has specific and efficient R-PDCCH resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If relay nodes share R-PDCCH resource blocks, then resource utilization efficiency is improved, but determining the starting location of R-PDCCH requires blind decoding which increases detection complexity
Solution Approach 1:
The patent applies preliminary action by pre-configuring the starting location of R-PDCCH resources for each relay node before communication begins. The eNB configures and notifies each RN of its specific starting location in advance, eliminating the need for blind decoding during actual operation. This pre-configuration approach resolves the contradiction by maintaining resource sharing efficiency while removing detection complexity through advance preparation.
2Adaptability or versatility
If relay nodes perform blind decoding to obtain R-PDCCH, then resource allocation flexibility is improved, but time consumption and detection complexity increase
Solution Approach 1:
The patent resolves this contradiction by performing the resource allocation decision in advance. The eNB determines and configures the starting location of R-PDCCH resources for each RN before communication occurs. This preliminary configuration maintains resource allocation flexibility through eNB control while eliminating time consumption associated with blind decoding during active communication.
3Productivity
If dedicated R-PDCCH resources are allocated to each relay node, then control channel management efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies preliminary action by having the eNB pre-configure and notify each relay node of its dedicated R-PDCCH starting location before communication begins. This approach achieves efficient dedicated control channel management during operation while concentrating the allocation complexity only in the initial configuration phase, which is managed centrally by the eNB.
Data Source
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AI summary
A configuration method, detection method and equipment for control channels of a relay system are provided in the present invention. The configuration method comprises: the network side transmits a Relay-Physical Downlink Control Channel (R-PDCCH) of a control channel to its service relay equipment, the related control information of said relay equipment is included in said R-PDCCH, said R-PDCCH is a dedicated R-PDCCH of said relay equipment. In the present invention, the dedicated control channel of the relay system is configured according to the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied by a R-PDCCH, and the mapping from a R-PDDCH/Relay-Physical Downlink Shared Channel (R-PDSCH) to a Resource Element (RE), and the demand that one relay node dedicates a R-PDCCH is satisfied.