Facilitating detection of control channels with different transmission time intervals in a wireless communication system

Patent metadata

Field	Value
Publication number	US-10356778-B2
Application number	US-201715594250-A
Country	US
Kind code	B2
Filing date	May 12, 2017
Priority date	May 12, 2016
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

Facilitation detection of control channels with different transmission time intervals (TTIs) in wireless communications systems is described herein. In one example, a computer-implemented method comprises: monitoring, by a mobile device comprising a processor, a first control channel in the beginning of a first TTI; and receiving, by the mobile device, a first downlink control information (DCI) on the first control channel in the first TTI, wherein information of the first DCI indicates a pattern of a second TTI associated with a second control channel, and wherein the second control channel occurs later than the first control channel and the second TTI is shorter than the first TTI. The computer-implemented method can also comprise determining, by the mobile device, whether to monitor the second control channel of the second TTI based on the information of the first DCI.

First claim

What is claimed is:

1. A computer-implemented method, comprising:
monitoring, by a mobile device comprising a processor, a first control channel in the beginning of a first transmission time interval (TTI);
receiving, by the mobile device, a first downlink control information (DCI) on the first control channel in the first TTI, wherein information of the first DCI indicates a pattern of a second TTI associated with a second control channel, and wherein the second control channel occurs later than the first control channel and the second TTI is shorter than the first TTI; and
determining, by the mobile device, whether and in which symbols to monitor the second control channel of the second TTI based on the information of the first DCI.

2. The computer-implemented method of claim 1 , further comprising:
receiving, by the mobile device, a second DCI on the second control channel;
performing, by the mobile device, a defined action based on the second DCI, wherein the defined action comprises at least one of: an uplink (UL) data transmission, wherein the pattern of the second TTI indicates the TTI of the UL data transmission; downlink (DL) data reception, wherein the pattern of the second TTI indicates the TTI of DL data reception; UL control information transmission; or DL control information reception.

3. The computer-implemented method of claim 2 , wherein the pattern of the second TTI indicates no second TTI exists in first TTI, and wherein the computer-implemented method further comprising:
determining, by the mobile device, that the second TTI is no longer in use, wherein the determining that the second TTI is no longer in use is based on the pattern of the second TTI indicating no second TTI exists in the first TTI.

4. The computer-implemented method of claim 2 , wherein the pattern of the second TTI indicates the second TTI exists in the first TTI, and wherein the computer-implemented method further comprising:
determining, by the mobile device, that the second TTI is in use, wherein the determining that the second TTI is in use is based on the pattern of the second TTI indicating the second TTI exists in the first TTI.

5. The computer-implemented method of claim 4 , wherein a period of having the second TTI is limited, wherein the period is at least one of: a fixed or configured value; or controlled by a defined timer, a defined window or a defined counter.

6. The computer-implemented method of claim 4 , wherein a period of having the second TTI is extended based on detection, by the mobile device, of a third DCI of the first TTI.

7. The computer-implemented method of claim 1 , wherein the first control channel is a physical downlink control channel or a secondary physical downlink control channel.

8. The computer-implemented method of claim 2 , wherein the first DCI is a stage 0 DCI and the second DCI is a stage 1 DCI.

9. A computer-implemented method, comprising:
monitoring, by a mobile device comprising a processor, a first control channel in the beginning of a first transmission time interval (TTI) to determine information of receiving a second control channel of a second TTI within the first TTI, wherein the second control channel occurs later than the first control channel and the second TTI is shorter than the first TTI;
monitoring, by the mobile device, the second control channel of the second TTI based on defined information without detection of a first downlink control information (DCI) on the first control channel in the first TTI;
receiving, by the mobile device, a second DCI on the second control channel; and
performing, by the mobile device, a defined action based on the second DCI or the defined information.

10. The computer-implemented method of claim 9 , wherein the defined information is at least one of: a last received third DCI on the first control channel or part of the third DCI; a fourth DCI of a last first TTI on the first control channel or part of the fourth DCI.

11. The computer-implemented method of claim 9 , wherein the defined information comprises all potential or preconfigured resource locations.

12. The computer-implemented method of claim 9 , wherein the defined action comprises at least one of receiving DL data on a DL data channel; receiving DL control information; transmitting UL data on a UL data channel; or transmitting UL control information.

13. The computer-implemented method of claim 12 , wherein the DL control information comprises transmit power control information.

14. The computer-implemented method of claim 12 , wherein the UL control information comprises a sounding reference signal, a channel status report or a random preamble.

15. The computer-implemented method of claim 9 , wherein the first control channel is a physical downlink control channel or a secondary physical downlink control channel.

16. The computer-implemented method of claim 9 , wherein the first DCI is a stage 0 DCI and the second DCI is a stage 1 DCI.

17. A computer-implemented method, comprising:
monitoring, by a mobile device coupled to a processor, a first control channel in a beginning of a first transmission time interval (TTI);
monitoring, by the device, a second control channel of a second TTI without detection of a first downlink control information (DCI) on the first control channel in the first TTI, wherein the second control channel occurs later than the first control channel and the second TTI is shorter than the first TTI;
receiving, by the device, a second DCI on the second control channel; and
performing, by the device, a defined action based on the second DCI or defined information.

18. The computer-implemented method of claim 17 , wherein the defined information is at least one of: a last received third DCI on the first control channel or part of the third DCI; or a fourth DCI of a last first TTI on the first control channel or part of the fourth DCI.

19. The computer-implemented method of claim 17 , wherein the defined action is at least one of: receiving DL data on a DL data channel; receiving DL control information like TPC based on the second DCI; transmitting UL data on a UL data channel; or transmitting a UL control information.

20. The computer-implemented method of claim 19 , wherein the UL control information comprises a sounding reference signal, a channel status report or a random preamble.

21. The computer-implemented method of claim 17 , wherein the first control channel is a physical downlink control channel or a secondary physical downlink control channel.

22. The computer-implemented method of claim 17 , wherein the first DCI is a stage 0 DCI and the second DCI is a stage 1 DCI.

23. A mobile device, comprising:
a control circuit;
a processor installed in the control circuit; and
a memory installed in the control circuit and operatively coupled to the processor, wherein the processor is configured to execute a program code stored in memory to perform resource requesting in a wireless communication system by operations comprising:
monitoring a first control channel in the beginning of a first transmission time interval (TTI);
receiving a first downlink control information (DCI) on the first control channel in the first TTI, wherein information of the first DCI indicates a pattern of a second TTI associated with a second control channel, and wherein the second control channel occurs later than the first control channel and the second TTI is shorter than the first TTI; and
determining, by t

Assignees

• Asustek Comp Inc

Inventors

• Tseng Li-Chih
• Lin Ko-Chiang
• Li Ming-Che

Classifications

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W74/006 Primary

  in the downlink, i.e. towards the terminal · CPC title

• H04W72/23

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

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title