Apparatus and method for inter-band pairing of carriers for time division duplex transmit- and receive-switching and its application to multiplexing of different transmission time

Patent metadata

Field	Value
Publication number	US-11832230-B2
Application number	US-202117321223-A
Country	US
Kind code	B2
Filing date	May 14, 2021
Priority date	May 19, 2014
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

Aspects of the present disclosure provide for the pairing of an inter-band carrier with a time division duplex (TDD) carrier. If the paired band is a frequency division duplex (FDD) band, then base stations and mobile devices may transmit and receive additional thin control channels on FDD carriers to enable full duplex operations. If the paired band is a TDD band, then a conjugate or inverse carrier may be used such that full duplex, or a close approximation thereto, is achieved. With the introduction of a paired channel and fast control channels, rapid uplink/downlink switching may be achieved for TDD carriers efficiently and effectively. Other aspects, embodiments, and features are also claimed and described.

First claim

What is claimed is:

1. A method of wireless communication operable at a subordinate entity, comprising:
wirelessly communicating utilizing a first transmission time interval (TTI) over a first carrier, the first carrier being a time division duplex (TDD) carrier; and
wirelessly communicating utilizing a second TTI having a different duration than the first TTI and at least partially overlapping the first TTI, over a second carrier paired with the first carrier but separated from the first carrier in frequency.

2. The method of claim 1 , wherein the second TTI is shorter in duration than the first TTI.

3. The method of claim 1 , wherein the second carrier comprises at least one control channel for controlling data transmissions on the first carrier.

4. The method of claim 3 , wherein the second carrier is a frequency division duplex (FDD) carrier.

5. The method of claim 4 , further comprising:
receiving an uplink grant on the FDD carrier, the uplink grant of time slots on the TDD carrier for an uplink transmission utilizing the first TTI; and
receiving a grant modification on the FDD carrier, the grant modification modifying at least a portion of the time slots for the uplink transmission, the portion of the time slots utilizing the second TTI.

6. The method of claim 5 , further comprising: transmitting a capacity indication for being capable of decoding the grant modification during the second TTI.

7. The method of claim 5 , wherein the grant modification modifying the portion of the time slots for the uplink transmission comprises canceling the portion of the time slots for the uplink transmission during the second TTI.

8. The method of claim 5 , further comprising:
canceling the uplink transmission on the portion of the time slots during the second TTI; and
resuming the uplink transmission on the TDD carrier after completion of the canceling the uplink transmission on the portion of the time slots.

9. The method of claim 4 , further comprising:
receiving a downlink grant on the FDD carrier, the downlink grant of time slots on the TDD carrier for a downlink reception utilizing the first TTI; and
receiving a grant modification on the FDD carrier, the grant modification canceling at least a portion of the time slots for the downlink reception, the portion of the time slots utilizing the second TTI.

10. The method of claim 9 , further comprising: transmitting a capacity indication for being capable of decoding the grant modification during the second TTI.

11. The method of claim 9 , further comprising:
suspending the downlink reception on the portion of the time slots, the portion of the time slots utilizing the second TTI; and
resuming the downlink reception on the TDD carrier after completion of the suspending the downlink reception on the portion of the time slots.

12. The method of claim 1 , wherein the second carrier is a TDD carrier having a conjugate paring with the first carrier, and
wherein at least a portion of first time slots in the first carrier are complementary in direction to a direction of time-aligned time slots in the second carrier.

13. The method of claim 12 , further comprising:
receiving an uplink grant of second time slots for an uplink transmission utilizing the first TTI; and
receiving a grant modification modifying at least a portion of the second time slots for the uplink transmission, the portion of the second time slots utilizing the second TTI.

14. The method of claim 13 , further comprising: transmitting a capacity indication for being capable of decoding the grant modification during the second TTI.

15. The method of claim 13 , further comprising:
canceling the uplink transmission on the portion of the second time slots, the portion of the second time slots utilizing the second TTI; and
resuming the uplink transmission after completion of the canceling the uplink transmission on the portion of the second time slots.

16. The method of claim 12 , further comprising:
receiving a downlink grant of second time slots for a downlink reception utilizing the first TTI; and
receiving a grant modification modifying at least at least a portion of the second time slots for the downlink reception, the portion of the second time slots utilizing the second TTI.

17. The method of claim 16 , further comprising: transmitting a capacity indication for being capable of decoding the grant modification during the second TTI.

18. The method of claim 16 , further comprising:
suspending the downlink reception on the portion of the second time slots, the portion of the second time slots utilizing the second TTI; and
resuming the downlink reception after completion of the suspending the downlink reception on the portion of the second time slots.

19. A subordinate entity configured for wireless communication, comprising:
at least one processor;
a non-transitory computer-readable medium communicatively coupled to the at least one processor; and
a transceiver communicatively coupled to the at least one processor,
wherein the at least one processor is configured to:
wirelessly communicate utilizing a first transmission time interval (TTI) over a first carrier, the first carrier being a time division duplex (TDD) carrier; and
wirelessly communicate utilizing a second TTI having a different duration than the first TTI and at least partially overlapping the first TTI, over a second carrier paired with the first carrier but separated from the first carrier in frequency.

20. The subordinate entity of claim 19 , wherein the second carrier comprises at least one control channel for controlling data transmissions on the first carrier.

21. The subordinate entity of claim 20 , wherein the second carrier is a frequency division duplex (FDD) carrier.

22. The subordinate entity of claim 21 , wherein the at least one processor is further configured to:
receive an uplink grant on the FDD carrier, the uplink grant of time slots on the TDD carrier for an uplink transmission utilizing the first TTI; and
receive a grant modification on the FDD carrier, the grant modification modifying at least a portion of the time slots for the uplink transmission, the portion of the time slots utilizing the second TTI.

23. The subordinate entity of claim 22 , wherein the grant modification modifying the portion of the time slots for the uplink transmission comprises canceling the portion of the time slots for the uplink transmission during the second TTI.

24. The subordinate entity of claim 19 , wherein the at least one processor is further configured to:
receive a downlink grant on the FDD carrier, the downlink grant of time slots on the TDD carrier for a downlink reception utilizing the first TTI; and
receive a grant modification on the FDD carrier, the grant modification canceling at least a portion of the time slots for the downlink reception, the portion of the time slots utilizing the second TTI.

25. The subordinate entity of claim 19 , wherein the second carrier is a TDD carrier having a conjugate paring with the first carrier, and wherein at least a portion of first time slots in the first carrier are complementary in direction to a direction of time-aligned time slots in the second carrier.

26. The subordinate entity of claim 25 , wherein the at least one processor is further configured to:
receive an uplink grant of second time slots for an uplink transmission utilizing the

Assignees

• Qualcomm Inc

Inventors

• Ji Tingfang
• Smee John Edward
• Soriaga Joseph Binamira
• Bhushan Naga
• Gaal Peter
• Gorokhov Alexei Yurievitch
• Mukkavilli Krishna Kiran
• Ang Peter
• Howard Michael Alexander
• Cooper Rotem

Classifications

• H04W72/1268

  of uplink data flows · CPC title

• H04W72/1273

  of downlink data flows · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title