Method and system for dynamic ACK/NACK repetition for robust downlink MAC PDU transmission in LTE
View Patent ↗A method and apparatus for dynamic acknowledgement repetition for a downlink medium access control packet data unit transmission ‘MAC PDU’ requiring multiple acknowledgements, the method having the steps of: receiving the downlink MAC PDU requiring multiple acknowledgements; and utilizing a differentiating factor and acknowledgement scheme, sending the multiple acknowledgements.
1. A method performed by a user equipment to provide acknowledgement (ACK) or negative acknowledgement (NACK) feedback regarding a downlink transmission, the method comprising:
upon receipt of a downlink transmission:
transmitting, by the user equipment, a first ACK/NACK feedback response in a first subframe using a first uplink transmission resource, and
transmitting, by the user equipment, a plurality of additional ACK/NACK feedback responses, each of the plurality of additional ACK/NACK feedback responses being transmitted in a respective subframe using a second uplink transmission resource that is different from the first uplink transmission resource.
2. The method of claim 1 , wherein the first uplink transmission resource and the second uplink transmission resource utilize different cyclic shifts.
3. The method of claim 1 , wherein the first uplink transmission resource and the second uplink transmission resource utilize different resource blocks.
4. The method of claim 1 , wherein each of the plurality of additional ACK/NACK feedback responses is a repetition of the first ACK/NACK feedback response.
5. The method of claim 1 , wherein each of the respective subframes is a subframe following the first subframe.
6. The method of claim 1 , wherein the first uplink transmission resource is determined based on a location of a physical downlink control channel.
7. The method of claim 1 , wherein the first uplink transmission resource is determined based on an index associated with a physical downlink control channel.
8. The method of claim 1 , wherein the downlink transmission is a single transmission of a Medium Access Control (MAC) Protocol Data Unit (PDU).
9. A user equipment comprising:
a receiver configured to receive a downlink transmission and
a transmitter configured to provide acknowledgement (ACK) or negative acknowledgement (NACK) feedback upon receipt of the downlink transmission by
transmitting a first ACK/NACK feedback response in a first subframe of a first uplink transmission resource, and
transmitting a plurality of additional ACK/NACK feedback responses, each of the plurality of additional ACK responses being transmitted in respective subframes of a second uplink transmission resource that is different from the first uplink transmission resource.
10. The user equipment of claim 9 , wherein the first uplink transmission resource and the second uplink transmission resource utilize a different cyclic shift.
11. The user equipment of claim 9 , wherein each of the plurality of additional ACK/NACK feedback responses is a repetition of the first ACK/NACK feedback response.
12. The user equipment of claim 9 , wherein the first uplink transmission resource is determined based on a location of a physical downlink control channel.
13. The user equipment of claim 9 , wherein the first uplink transmission resource is determined based on an index associated with a physical downlink control channel.
14. A method performed by a user equipment for providing acknowledgement (ACK) or a negative acknowledgement (NACK) feedback, the method comprising:
transmitting, by a transmitter of the user equipment, a first ACK/NACK response corresponding to a downlink transmission, the first ACK/NACK response transmitted in a first subframe using a first uplink transmission resource; and
repeating transmission, by the transmitter of the user equipment, of additional ACK/NACK responses corresponding to the downlink transmission, each of the plurality of additional ACK/NACK responses being transmitted in a respective subframe using a second uplink transmission resource that is different from the first uplink transmission resource.
15. A user equipment for providing acknowledgement (ACK) or a negative acknowledgement (NACK) feedback, the user equipment comprising:
a receiver configured to receive a downlink transmission; and
a transmitter configured to transmit a first ACK/NACK response corresponding to a downlink transmission, the first ACK/NACK response transmitted in a first subframe using a first uplink transmission resource, and repeat transmission of additional ACK/NACK responses corresponding to the downlink transmission, each of the plurality of additional ACK/NACK responses being transmitted in a respective subframe using a second uplink transmission resource that is different from the first uplink transmission resource.