Relay Node Signal Reception Using Reference Signals Between Guard Intervals
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Solution Overview
Problem
In wireless communication systems, Relay Nodes (RN) face challenges in receiving data and control signals from Evolved Node Bs (eNBs) due to the absence of effective solutions for proper signal transmission and synchronization during the backhaul link, particularly in MBSFN subframes, leading to incomplete reception of PDCCH signals.
Innovation Solution
The method involves carrying a Common Reference Signal (CRS) or Demodulation Reference Signal (DMRS) by the eNB over specific OFDM symbols and carriers between the guard intervals TRG and RTG, allowing the RN to demodulate data and control signals correctly, ensuring proper synchronization and signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the RN uses half-duplex operation to extend coverage area, then the coverage area is improved, but the RN cannot receive and transmit signals simultaneously causing incomplete reception of control signals
Solution Approach 1:
The backhaul subframe is segmented into distinct time regions: the first part contains downlink control signals (PDCCH) received from the donor eNB, while the second part contains uplink transmissions to the donor eNB. This temporal segmentation allows the RN to properly receive control signals during the downlink portion before switching to transmission mode, resolving the half-duplex conflict while maintaining complete control signal reception.
2Productivity
If the RN switches from receiving to transmitting without a guard interval, then the transmission efficiency is improved, but the structural integrity of guard intervals is compromised
Solution Approach 1:
The guard interval is configured and maintained in advance within the backhaul subframe structure. By pre-defining the guard interval position and duration before the RN switches from receiving to transmitting, the system ensures proper signal transition while maintaining the structural integrity of the guard interval. This preliminary configuration allows efficient switching without compromising the protective function of the guard interval.
Data Source
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AI summary
A method, system and device for wireless communication are provided by the present invention. The method includes that: from the ending of the Transmit-Receive Guard interval (TRG) to the beginning of the Receive-Transmit Guard interval (RTG), an evolved Node B (eNB) carries Common Reference Signals (CRSs) or Demodulated Reference Signals (DMRSs) on the carriers are used for transmitting data signals and/or control signals to a Relay Node (RN); the RN demodulates, according to the CRSs or the DMRSs, the signals transmitted by the eNB; the TRG is the guard interval of the transition, for the RN, from transmitting signals to receiving signals over the backhaul link, and the RTG is the guard interval of the transition, for the RN, from receiving signals to transmitting signals over the backhaul link. The application of the present invention enables the RN to receive the data signals and/or control signals transmitted by the eNB correctly.