Abstract
Hybrid ARQ is employed in a multi-carrier communication system for retransmission of erroneous packets by taking advantage of time/frequency/space diversity and by combining ARQ functions at physical layer and MAC layers making the multi-carrier system more robust in a high packet-error environment.
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4G | 28/05/2018 | ISLD-201808-005 | GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD |
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4G | 28/05/2018 | ISLD-201808-005 | GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD |
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Yes | Basis Patent |
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Synchronization
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Claim
1. A method for a transmitter with multiple transmission antennas in a wireless communication system, the method comprising:
configuring a first subchannel and a second subchannel in the spatial domain for signal transmissions to a receiver in the communication system, the first and second subchannels containing Orthogonal Frequency Division Multiplexing (OFDM) subcarriers;
transmitting concurrently to the receiver, at a first transmission time a first data packet over the first subchannel and a second data packet over the second subchannel;
receiving a signal from the receiver, the signal indicating an error in the first data packet received by the receiver;
providing, to the receiver, information regarding a retransmission process for a data packet received in error, the information indicating a use of subchannel swapping for retransmission; and
transmitting concurrently to the receiver, at a second transmission time, a redundancy version of the first data packet over the second subchannel and a third packet over the first subchannel, the third packet being swapped from transmission over the second subchannel.
2. The method of claim 1, wherein the transmission over the first or second subchannel uses an adaptive modulation and coding scheme.
3. The method of claim 2, wherein the retransmission process uses an adaptive modulation and coding scheme for retransmission of the redundancy version of the first data packet.
4. The method of claim 1, wherein the transmission over the first or second subchannel uses a rate-matching scheme.
5. The method of claim 1, wherein the redundancy version of the first data packet is a progressive parity packet of the first data packet.
6. The method of claim 1, wherein the signal from the receiver indicating an error in the first data packet is a negative acknowledgement (NACK) from the receiver.
7. The method of claim 1, further comprising receiving a channel quality indicator (CQI) or channel measurements from the receiver.
8. A wireless communication system with multiple transmission antennas, the wireless communication system comprising:
a transmitter to:
allocate a first subchannel and a second subchannel in the spatial domain for signal transmissions to a receiver in the communication system, the first and second subchannels containing Orthogonal Frequency Division Multiplexing (OFDM) subcarriers;
transmit concurrently to the receiver, at a first transmission time, a first data packet over the first subchannel and a second data packet over the second subchannel; and
receive a signal from the receiver, the signal indicating an error in the first data packet received by the receiver; and
a scheduler to provide to the receiver information regarding a retransmission process for a data packet received in error, the control information indicating a use of subchannel swapping for retransmission;
wherein the transmitter is further configured to transmit concurrently to the receiver, at a second transmission time, a redundancy version of the first data packet over the second subchannel and a third packet over the first subchannel, the third packet being swapped from transmission over the second subchannel.
9. The system of claim 8, wherein the transmitter is further configured to receive a channel quality indicator (CQI) or channel measurements from the receiver.
10. A method for a receiver in a wireless communication system, the method comprising:
concurrently receiving from a transmitter, at a first reception time, a first data packet over a first subchannel and a second data packet over a second subchannel, wherein the first and second subchannels have different spatial configurations;
transmitting a signal to the transmitter, the signal indicating an error in the first data packet received by the receiver;
receiving information regarding a retransmission process for a data packet received in error, the information indicating a use of subchannel swapping for retransmission by the transmitter; and
concurrently receiving, at a second reception time, a redundancy version of the first data packet over the second subchannel and a third packet over the first subchannel, the third packet being swapped from transmission over the second subchannel.
11. The method of claim 10, wherein the reception over the first or second subchannel uses an adaptive modulation and coding scheme.
12. The method of claim 11, wherein the retransmission process uses an adaptive modulation and coding scheme for retransmission of the redundancy version of the first data packet.
13. The method of claim 10, wherein the reception over the first or second subchannel uses a rate-matching scheme.
14. The method of claim 10, wherein the redundancy version of the first data packet is a progressive parity packet of the first data packet.
15. The method of claim 10, wherein the transmitted signal to the transmitter is a negative acknowledgement (NACK).
16. The method of claim 10, further comprising transmitting a channel quality indicator (CQI) or channel measurements to the transmitter.
17. A wireless communication system, the wireless communication system comprising:
a receiver to concurrently receive from a transmitter, at a first reception time, a first data packet over a first subchannel and a second data packet over a second subchannel, wherein the first and second subchannels have different spatial configurations; and
an acknowledgement transmitter configured to transmit a signal to the transmitter, the signal indicating an error in the first data packet received by the receiver;
wherein the receiver is further configured to:
receive information regarding a retransmission process for a data packet received in error, the information indicating a use of subchannel swapping for retransmission by the transmitter; and
concurrently receive, at a second reception time, a redundancy version of the first data packet over the second subchannel and a third packet over the first subchannel, the third packet being swapped from transmission over the second subchannel.
18. The system of claim 17, wherein the acknowledgement transmitter is further configured to transmit a channel quality indicator (CQI) or channel measurements to the transmitter.
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