Short TTI patterns
There is disclosed a method of operating a terminal ( 10 ) in a wireless communication network, the method comprising receiving and/or transmitting according to a transmission time interval, TTI, configuration, the TTI configuration indicating at least one short transmitting time interval having between one or two and seven symbols of duration in a subframe. There are also disclosed related methods and devices.
1. A method of operating a terminal in a wireless communication network, the method comprising:
receiving or transmitting according to a transmission time interval, TTI, configuration, the TTI configuration indicating a plurality of TTI patterns,
wherein each TTI pattern includes at least one short TTI having between one or two and seven symbols of duration in a subframe, and
wherein, within each TTI pattern, the at least one short TTI ends at a same Orthogonal Frequency Division Multiple Access, OFDM, symbol.
2. The method according to claim 1 , wherein the TTI configuration is configured by a network node.
3. The method according to claim 1 , wherein, for each TTI pattern, the at least one short TTI is confined within a slot.
4. The method according to claim 3 , wherein the slot is a first slot in a first subframe of each TTI pattern.
5. The method according to claim 3 , wherein the at least one short TTI comprises:
a first short TTI having between one or two and seven symbols of duration in a first slot of a first subframe, and
a second short TTI having between one or two and seven symbols of duration in another slot of the first subframe, wherein the second short TTI has a short TTI length that is different from a short TTI length of the first short TTI.
6. The method according to claim 1 , wherein the at least one short TTI comprises:
a first short TTI having between one or two and seven symbols of duration in a first subframe, and
a second short TTI having between one or two and seven symbols of duration in a second subframe, wherein the second short TTI has a short TTI length that is different from a short TTI length of the first short TTI.
7. A terminal for a wireless communication network, the terminal comprising:
processing circuitry configured to receive or transmit according to a transmission time interval, TTI, configuration, the TTI configuration indicating a plurality of TTI patterns,
wherein each TTI pattern includes at least one short TTI having between one or two and seven symbols of duration in a subframe, and
wherein, within each TTI pattern, the at least one short TTI ends at a same Orthogonal Frequency Division Multiple Access, OFDM, symbol.
8. The terminal according to claim 7 , wherein the TTI configuration is configured by a network node.
9. The terminal according to claim 7 , wherein, for each TTI pattern, the at least one short TTI is confined within a slot.
10. The terminal according to claim 9 , wherein the slot is a first slot in a first subframe of each TTI pattern.
11. The terminal according to claim 9 , wherein the at least one short TTI comprises:
a first short TTI having between one or two and seven symbols of duration in a first slot of a first subframe, and
a second short TTI having between one or two and seven symbols of duration in another slot of the first subframe, wherein the second short TTI has a short TTI length that is different from a short TTI length of the first short TTI.
12. The terminal according to claim 7 , wherein the at least one short TTI comprises:
a first short TTI having between one or two and seven symbols of duration in a first subframe, and
a second short TTI having between one or two and seven symbols of duration in a second subframe, wherein the second short TTI has a short TTI length that is different from a short TTI length of the first short TTI.
13. A method of operating a network node in a wireless communication network, the method comprising:
configuring a terminal with a transmission time interval, TTI, configuration for downlink communication and/or uplink transmission, the TTI configuration indicating a plurality of TTI patterns,
wherein each TTI pattern includes at least one short TTI having between one or two and seven symbols of duration in a subframe, and
wherein, within each TTI pattern, the at least one short TTI ends at a same Orthogonal Frequency Division Multiple Access, OFDM, symbol.
14. The method according to claim 13 , wherein, for each TTI pattern, the at least one short TTI is confined within a slot.
15. The method according to claim 14 , wherein the slot is a first slot in a first subframe of each TTI pattern.
16. The method according to claim 14 , wherein the at least one short TTI comprises:
a first short TTI having between one or two and seven symbols of duration in a first slot of a first subframe, and
a second short TTI having between one or two and seven symbols of duration in another slot of the first subframe, wherein the second short TTI has a short TTI length that is different from a short TTI length of the first short TTI.
17. The method according to claim 13 , wherein the at least one short TTI comprises:
a first short TTI having between one or two and seven symbols of duration in a first subframe, and
a second short TTI having between one or two and seven symbols of duration in a second subframe, wherein the second short TTI has a short TTI length that is different from a short TTI length of the first short TTI.
18. A network node for a wireless communication network, the network node comprising:
processing circuitry configured to configure a terminal with a transmission time interval, TTI, configuration for downlink communication and/or uplink transmission, the TTI configuration indicating a plurality of TTI patterns,
wherein each TTI pattern includes at least one short TTI having between one or two and seven symbols of duration in a subframe, and
wherein, within each TTI pattern, the at least one short TTI ends at a same Orthogonal Frequency Division Multiple Access, OFDM, symbol.
19. A non-transitory computer readable medium storing code executable by processing circuitry, the code causing the processing circuitry to:
receive or transmit according to a transmission time interval, TTI, configuration, the TTI configuration indicating a plurality of TTI patterns,
wherein each TTI pattern includes at least one short TTI having between one or two and seven symbols of duration in a subframe, and
wherein, within each TTI pattern, the at least one short TTI ends at a same Orthogonal Frequency Division Multiple Access, OFDM, symbol.