FRAME STRUCTURE SIGNALING FOR MULTEFIRE

• US 20170311346A1
• Filed: 04/20/2017
• Published: 10/26/2017
• Est. Priority Date: 04/22/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chendamarai Kannan, Arumugam, Patel, Chirag, Luo, Tao, Kadous, Tamer
• Granted Patent: US 10,631,331 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]

Abstract

Methods, systems, and devices for wireless communication are described. A downlink control message type used for triggering uplink transmissions may convey additional information, including timing for uplink transmissions. The type or format of the control channel (e.g., physical downlink control channel (PDCCH) type or format) used to trigger an uplink transmission may also indicate a starting time or a time period, or both for the uplink transmission. In some cases, downlink control information (DCI) may indicate the function of a downlink control message that includes the DCI. Additionally, system information identified in a downlink control message may be used to determine a subframe length which, in some examples, may be used to determine whether or how long to monitor a discovery reference signal (DRS) subframe.

Claims

1. A method of wireless communication, comprising:

receiving a downlink (DL) control message using a first set of resources of a shared radio frequency spectrum band;

identifying downlink control information (DCI) of the DL control message; and

determining a function of the DL control message based at least in part on the DCI, wherein the function of the DL control message comprises at least one of an uplink transmission trigger or a frame structure indication.

2. The method of claim 1, further comprising:

identifying a control channel type of the DL control message; and

determining a starting time for an uplink (UL) transmission based at least in part on the control channel type.

3. The method of claim 2, further comprising:

determining a time period for the UL transmission based at least in part on one or both of a user equipment (UE) capability and the control channel type.

4. The method of claim 3, further comprising:

transmitting a UL message during the time period, wherein the UL message comprises at least one of a physical uplink control channel (PUCCH) message, a short PUCCH (sPUCCH) message, an enhanced PUCCH (ePUCCH) message, an acknowledgement (ACK) message corresponding to a previous DL transmission, or a physical uplink shared channel (PUSCH) message.

5. The method of claim 1, further comprising:

receiving a grant for a physical uplink shared channel (PUSCH) transmission before receiving the DL control message.

6. The method of claim 1, further comprising:

receiving a cross-TxOP grant, wherein the function of the DL control message is a cross-TxOP grant trigger and the cross-TxOP grant is received before the cross-TxOP grant trigger; and

transmitting a UL message in response to the cross-TxOP grant and the cross-TxOP grant trigger.

7. The method of claim 6, further comprising:

receiving a cross-TxOP configuration indicating a location of the cross-TxOP grant trigger.

8. The method of claim 6, wherein the cross-TxOP grant trigger comprises a single bit of the DL control message.

9. The method of claim 6, wherein the cross-TxOP grant trigger comprises a plurality of bits of the DL control message corresponding to a plurality of cross-TxOP grants.

10. The method of claim 1, wherein the DL control message is a common physical downlink control channel (C-PDCCH).

11. The method of claim 1, wherein the at least one of the uplink transmission trigger or the frame structure indication comprises at least one of a short physical uplink control channel (sPUCCH) trigger, an enhanced PUCCH (ePUCCH) trigger, or a cross-transmission opportunity (TxOP) grant trigger.

12. A method of wireless communication, comprising:

configuring a function of a downlink (DL) control message, wherein the function of the DL control message comprises at least one of an uplink transmission trigger or a frame structure indication;

selecting downlink control information (DCI) of the DL control message based at least in part on the function of the DL control message; and

transmitting the DL control message using a first set of resources of a shared radio frequency spectrum band.

13. The method of claim 12, further comprising:

identifying a control channel type of the DL control message; and

determining a starting time for an uplink (UL) transmission based at least in part on the control channel type.

14. The method of claim 13, further comprising:

determining a time period for the UL transmission based at least in part on one or both of a user equipment (UE) capability and the control channel type.

15. The method of claim 14, further comprising:

receiving a UL message during the time period, wherein the UL message comprises at least one of a physical uplink control channel (PUCCH) message, a short PUCCH (sPUCCH) message, an enhanced PUCCH (ePUCCH) message, an acknowledgement (ACK) message corresponding to a previous DL transmission, or a physical uplink shared channel (PUSCH) message.

16. The method of claim 12, further comprising:

transmitting a grant for a physical uplink shared channel (PUSCH) transmission before transmitting the DL control message.

17. The method of claim 12, further comprising:

transmitting a cross-TxOP grant, wherein the function of the DL control message is a cross-TxOP grant trigger and the cross-TxOP grant is transmitted before the cross-TxOP grant trigger; and

receiving an uplink (UL) message in response to the cross-TxOP grant and the cross-TxOP grant trigger.

18. The method of claim 17, further comprising:

transmitting a cross-TxOP configuration indicating a location of the cross-TxOP grant trigger.

19. The method of claim 17, wherein the cross-TxOP grant trigger comprises a single bit of the DL control message.

20. The method of claim 17, wherein the cross-TxOP grant trigger comprises a plurality of bits of the DL control message corresponding to a plurality of cross-TxOP grants.

21. The method of claim 12, wherein the DL control message is a common physical downlink control channel (C-PDCCH).

22. The method of claim 12, wherein the at least one of the uplink transmission trigger or the frame structure indication comprises at least one of a short physical uplink control channel (sPUCCH) trigger, an enhanced PUCCH (ePUCCH) trigger, or a cross-transmission opportunity (TxOP) grant trigger.

23. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

receive a downlink (DL) control message using a first set of resources of a shared radio frequency spectrum band;

identify downlink control information (DCI) of the DL control message; and

determine a function of the DL control message based at least in part on the DCI, wherein the function of the DL control message comprises at least one of an uplink transmission trigger or a frame structure indication.

24. The apparatus of claim 23, wherein the instructions are operable to cause the apparatus to:

identify a control channel type of the DL control message; and

determine one or both of a starting time for an uplink (UL) transmission based at least in part on the control channel type and a time period for the UL transmission based at least in part on one or both of a user equipment (UE) capability and the control channel type.

25. The apparatus of claim 24, wherein the instructions are operable to cause the apparatus to:

transmit an UL message during the time period, wherein the UL message comprises at least one of a physical uplink control channel (PUCCH) message, a short PUCCH (sPUCCH) message, an enhanced PUCCH (ePUCCH) message, an acknowledgement (ACK) message corresponding to a previous DL transmission, or a physical uplink shared channel (PUSCH) message.

26. The apparatus of claim 23, wherein the instructions are operable to cause the apparatus to:

receive a cross-TxOP grant, wherein the function of the DL control message is a cross-TxOP grant trigger and the cross-TxOP grant is received before the cross-TxOP grant trigger; and

transmit a UL message in response to the cross-TxOP grant and the cross-TxOP grant trigger.

27. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

configure a function of a downlink (DL) control message, wherein the function of the DL control message comprises at least one of an uplink transmission trigger or a frame structure indication;

select downlink control information (DCI) of the DL control message based at least in part on the function of the DL control message; and

transmit the DL control message using a first set of resources of a shared radio frequency spectrum band.

28. The apparatus of claim 27, wherein the instructions are operable to cause the apparatus to:

identify a control channel type of the DL control message; and

determine one or both of a starting time for an uplink (UL) transmission based at least in part on the control channel type and a time period for the UL transmission based at least in part on one or both of a user equipment (UE) capability and the control channel type.

29. The apparatus of claim 28, wherein the instructions are operable to cause the apparatus to:

receive a UL message during the time period, wherein the UL message comprises at least one of a physical uplink control channel (PUCCH) message, a short PUCCH (sPUCCH) message, an enhanced PUCCH (ePUCCH) message, an acknowledgement (ACK) message corresponding to a previous DL transmission, or a physical uplink shared channel (PUSCH) message.

30. The apparatus of claim 27, wherein the instructions are operable to cause the apparatus to:

transmit a cross-TxOP grant, wherein the function of the DL control message is a cross-TxOP grant trigger and the cross-TxOP grant is transmitted before the cross-TxOP grant trigger; and

receive an uplink (UL) message in response to the cross-TxOP grant and the cross-TxOP grant trigger.