Data throughput for cell-edge users in a LTE network using down-link repeaters and up link HARQ relays
First Claim
1. An apparatus of a relay node (RN) comprising:
- processing circuitry and transceiver circuitry configured to;
demodulate a PDCCH to decode downlink control information (DCI), the DCI providing an indication as to what subframes can be used for by the RN for reception and transmission of downlink or uplink data, and re-transmission to a user equipment (UE),wherein downlink transmissions from an evolved Node B (eNB) to the RN are received during a first plurality of subframes, and downlink transmissions from the RN to the UE are transmitted during a second plurality of subframes in accordance with the indication provided in the DCI;
receive downlink transmissions from the eNB during the first plurality of subframes; and
retransmit the downlink transmissions to the UE during the second plurality of subframes, wherein the first plurality of subframes are time multiplexed with the second plurality of subframes.
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Accused Products
Abstract
A combination of repeaters and relays is used to improve the data throughput for user equipment (“UE”) near the cell edge in a LTE network. Amplify-and-forward repeaters and decode-and-forward relays enhance the down-link and up-link, respectively. Relay assistance on the up-link occurs when the evolved Node B (“eNB”) requests a retransmission (HARQ) from the UE at which point the UE and relay transmit simultaneously in a cooperative fashion. The quality of the up-link signal received by the eNB is improved due to a favorable channel through the relay. An analysis shows that relay assistance improves the throughput for a cell-edge user when the average delay per data transport block is allowed to increase.
35 Citations
20 Claims
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1. An apparatus of a relay node (RN) comprising:
processing circuitry and transceiver circuitry configured to; demodulate a PDCCH to decode downlink control information (DCI), the DCI providing an indication as to what subframes can be used for by the RN for reception and transmission of downlink or uplink data, and re-transmission to a user equipment (UE), wherein downlink transmissions from an evolved Node B (eNB) to the RN are received during a first plurality of subframes, and downlink transmissions from the RN to the UE are transmitted during a second plurality of subframes in accordance with the indication provided in the DCI; receive downlink transmissions from the eNB during the first plurality of subframes; and retransmit the downlink transmissions to the UE during the second plurality of subframes, wherein the first plurality of subframes are time multiplexed with the second plurality of subframes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A non-transitory computer-readable medium comprising instructions that, when executed on processing circuitry of a relay node (RN), cause the RN to:
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demodulate a PDCCH to decode downlink control information (DCI), the DCI providing an indication as to what subframes can be used for by the RN for reception and transmission of downlink or uplink data, and re-transmission to a user equipment (UE), wherein downlink transmissions from an evolved Node B (eNB) to the RN are received during a first plurality of subframes, and downlink transmissions from the RN to the UE are transmitted during a second plurality of subframes in accordance with the indication provided in the DCI; receive downlink transmissions from the eNB during the first plurality of subframes; and retransmit the downlink transmissions to the UE during the second plurality of subframes, wherein the first plurality of subframes are time multiplexed with the second plurality of subframes. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for relay node (RN) operation, comprising:
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demodulating a PDCCH to decode downlink control information (DCI), the DCI providing an indication as to what subframes can be used for by the RN for reception and transmission of downlink or uplink data, and re-transmission to a user equipment (UE), wherein downlink transmissions from an evolved Node B (eNB) to the RN are received during a first plurality of subframes, and downlink transmissions from the RN to the UE are transmitted during a second plurality of subframes in accordance with the indication provided in the DCI; receiving downlink transmissions from the eNB during the first plurality of subframes; configuring the received downlink transmissions from the eNB for retransmission to the UE as multimedia broadcast single frequency network (MBSFN) subframes; and retransmitting the downlink transmission to the UE during the MBSFN subframes.
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Specification