Method and apparatus for scheduling uplink transmissions with reduced latency

1. A method at a device, the method comprising:

receiving a first higher layer parameter for uplink power control adjustment associated with a first transmit time interval duration, where the higher layer is higher than a physical layer;

receiving a second higher layer parameter for uplink power control adjustment associated with a second transmit time interval duration;

receiving a first transmit power control command for power control adjustment, the first transmit power control command included in a first physical control channel with a first downlink control information format;

receiving a second transmit power control command for power control adjustment, the second transmit power control command included in a second physical control channel with a second downlink control information format;

determining a first transmit power for a first physical uplink shared channel transmission in a subframe with the first transmit time interval duration for a first serving cell based on the first higher layer parameter for uplink power control adjustment and the first transmit power control command, where the first physical uplink shared channel transmission spans the first transmit time interval duration, and where the first transmit time interval duration comprises a first number of symbols;

determining a second transmit power for a second physical uplink shared channel transmission in a slot with a second transmit time interval duration for a second serving cell based on the second higher layer parameter for uplink power control adjustment and the second transmit power control command, where the second physical uplink shared channel transmission spans the second transmit time interval duration, where the second transmit time interval duration comprises a second number of symbols and where the second transmit time interval duration is different from the first transmit time interval duration;

transmitting the first physical uplink shared channel in the subframe using the first transmit power; and

transmitting the second physical uplink shared channel in the slot using the second transmit power, where the first physical uplink shared channel transmission and the second physical uplink shared channel transmission overlap in time for at least one symbol duration.

2. The method according to claim 1 , further comprising receiving a higher layer configuration parameter indicating a maximum transmit power value,

wherein determining the second transmit power further comprises determining the second transmit power for the second physical uplink shared channel transmission in any portion of the slot for the second serving cell so that a combined transmission power of the first uplink transmission and the second uplink transmission in any portion of the slot does not exceed the configured maximum transmit power value.

3. The method according to claim 2 , further wherein determining the second transmit power further comprises determining the second transmit power by reducing a transmit power required for the second physical uplink shared channel transmission in any portion of the slot for the second serving cell.

4. The method according to claim 1 ,

wherein the subframe comprises a first subframe,

wherein the slot comprises a first slot, and

wherein the method further comprises:

receiving a third higher layer parameter for uplink power control of a physical uplink control channel transmission associated with a third transmit time interval duration;

receiving a fourth higher layer parameter for uplink power control of the physical uplink control channel transmission associated with a fourth transmit time interval duration;

determining a third transmit power for a first physical uplink control channel transmission in a second subframe with a third transmit time interval duration for a third serving cell based on the third higher layer parameter for uplink power control of the physical uplink control channel, where the first physical uplink control channel transmission spans the third transmit time interval duration;

determining a fourth transmit power for a second physical uplink control channel transmission in a second slot with a fourth transmit time interval duration for a fourth serving cell based on the fourth higher layer parameter for uplink power control of the physical uplink control channel, where the second physical uplink control channel transmission spans the fourth transmit time interval duration, and where the fourth transmit time interval duration is shorter than the third transmit time interval duration;

transmitting the first physical uplink control channel in the second subframe using the third transmit power; and

transmitting the second physical uplink control channel in the second slot using the fourth transmit power.

5. The method according to claim 4 ,

wherein the third transmit time interval duration is the same as the first transmit time interval duration, and

wherein the fourth transmit time interval duration is the same as the second transmit time interval duration.

6. The method according to claim 4 , further comprising transmitting the second physical uplink shared channel in the first slot while not transmitting the first physical uplink control channel in the second subframe, where the third serving cell is the same as the second serving cell, and where the second physical uplink shared channel transmission and the first physical uplink control channel transmission overlap in time for at least one symbol duration.

7. The method according to claim 4 , further comprising transmitting the second physical uplink control channel in the second slot while not transmitting the first physical uplink control channel in the second subframe, where the third serving cell is the same as the fourth serving cell, and where the second physical uplink control channel transmission and the first physical uplink control channel transmission overlap in time for at least one symbol duration.

8. The method according to claim 4 , further comprising transmitting the second physical uplink control channel in the second slot while not transmitting the first physical uplink shared channel in the first subframe, where the fourth serving cell is the same as the first serving cell, and where the second physical uplink control channel transmission and the first physical uplink shared channel transmission overlap in time for at least one symbol duration.

9. The method according to claim 4 , wherein the third transmit time interval duration comprises a third number of symbols, and the fourth transmit time interval duration comprises a fourth number of symbols.

10. The method according to claim 1 , further comprising transmitting the second physical uplink shared channel in the first slot while not transmitting the first physical uplink shared channel in the first subframe wherein the first serving cell is the same as the second serving cell.

11. The method according to claim 1 , wherein the second physical uplink shared channel transmission is a semi-persistently scheduled physical uplink shared channel transmission.

12. The method according to claim 1 , wherein the second number of symbols is different than the first number of symbols.

13. An apparatus comprising:

a transceiver that

receives a first higher layer parameter for uplink power control adjustment associated with a first transmit time interval duration, where the higher layer is higher than a physical layer,

receives a second higher layer parameter for uplink power control adjustment associated with a second transmit time interval duration,

receives a first transmit power control command for power control adjustment, the first transmit power control command included in a first physical control channel with a first downlink control information format, and

receives a second transmit power control command for power control adjustment, the second transmit power control command included in a second physical control channel with a second downlink control information format; and

a controller coupled to the transceiver, where the controller

determines a first transmit power for a first physical uplink shared channel transmission in a subframe with the first transmit time interval duration for a first serving cell based on the first higher layer parameter for uplink power control adjustment and the first transmit power control command, where the first physical uplink shared channel transmission spans the first transmit time interval duration, and where the first transmit time interval duration comprises a first number of symbols, and

determines a second transmit power for a second physical uplink shared channel transmission in a slot with a second transmit time interval duration for a second serving cell based on the second higher layer parameter for uplink power control adjustment and the second transmit power control command, where the second physical uplink shared channel transmission spans the second transmit time interval duration, where the second transmit time interval duration comprises a second number of symbols and where the second transmit time interval duration is different from the first transmit time interval duration,

wherein the transceiver

transmits the first physical uplink shared channel in the subframe using the first transmit power, and

transmits the second physical uplink shared channel in the slot using the second transmit power, where the first physical uplink shared channel transmission and the second physical uplink shared channel transmission overlap in time for at least one symbol duration.

14. The apparatus according to claim 13 ,

wherein the transceiver receives a higher layer configuration parameter indicating a maximum transmit power value, and

wherein the controller determines the second transmit power for the second physical uplink shared channel transmission in any portion of the slot for the second serving cell so that a combined transmission power of the first uplink transmission and the second uplink transmission in any portion of the slot does not exceed the configured maximum transmit power value.

15. The apparatus according to claim 14 , wherein the controller determines the second transmit power by reducing a transmit power required for the second physical uplink shared channel transmission in any portion of the slot for the second serving cell.

16. The apparatus according to claim 13 ,

wherein the subframe comprises a first subframe,

wherein the slot comprises a first slot,

wherein the transceiver

receives a third higher layer parameter for uplink power control of a physical uplink control channel transmission associated with a third transmit time interval duration, and

receives a fourth higher layer parameter for uplink power control of the physical uplink control channel transmission associated with a fourth transmit time interval duration,

wherein the controller

determines a third transmit power for a first physical uplink control channel transmission in a second subframe with a third transmit time interval duration for a third serving cell based on the third higher layer parameter for uplink power control of the physical uplink control channel, where the first physical uplink control channel transmission spans the third transmit time interval duration, and

determines a fourth transmit power for a second physical uplink control channel transmission in a second slot with a fourth transmit time interval duration for a fourth serving cell based on the fourth higher layer parameter for uplink power control of the physical uplink control channel, where the second physical uplink control channel transmission spans the fourth transmit time interval duration, and where the fourth transmit time interval duration is shorter than the third transmit time interval duration, and

wherein the transceiver

transmits the first physical uplink control channel in the second subframe using the third transmit power, and

transmits the second physical uplink control channel in the second slot using the fourth transmit power.

17. The apparatus according to claim 16 , wherein the transceiver transmits the second physical uplink shared channel in the first slot while not transmitting the first physical uplink control channel in the second subframe, where the third serving cell is the same as the second serving cell, and where the second physical uplink shared channel transmission and the first physical uplink control channel transmission overlap in time for at least one symbol duration.

18. The apparatus according to claim 16 , wherein the transceiver transmits the second physical uplink control channel in the second slot while not transmitting the first physical uplink control channel in the second subframe, where the third serving cell is the same as the fourth serving cell, and where the second physical uplink control channel transmission and the first physical uplink control channel transmission overlap in time for at least one symbol duration.

19. The apparatus according to claim 16 , wherein the transceiver transmits the second physical uplink control channel in the second slot while not transmitting the first physical uplink shared channel in the first subframe, where the fourth serving cell is the same as the first serving cell, and where the second physical uplink control channel transmission and the first physical uplink shared channel transmission overlap in time for at least one symbol duration.

20. The apparatus according to claim 13 , wherein the transceiver transmits the second physical uplink shared channel in the first slot while not transmitting the first physical uplink shared channel in the first subframe wherein the first serving cell is the same as the second serving cell.