VEHICLE-TO-EVERYTHING CONTROL CHANNEL DESIGN

• US 20180220410A1
• Filed: 11/08/2017
• Published: 08/02/2018
• Est. Priority Date: 01/31/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Baghel, Sudhir Kumar, Li, Junyi, Patil, Shailesh, Gulati, Kapil
• Granted Patent: US 10,165,574 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/04 using frequency diversity
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0058 Allocation criteria
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• 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 transmitting device may identify resource blocks (RBs) used to transmit data in a data transmission. The transmitting device may determine a frequency width of a data channel in a frequency domain that is used to transmit the data based at least in part on the identified RBs. The transmitting device may dynamically determine an allocation of RBs used to transmit control information in a control channel. The allocation of RBs may be based on the frequency width of the data channel and may cause a frequency width of the control channel to match the frequency width of the data channel in the frequency domain. The transmitting device may transmit the control information in the control channel to indicate a location of the data channel.

Claims

1. A method for wireless communication, comprising:

identifying resource blocks (RBs) used to transmit data in a data transmission;

determining a frequency width of a data channel in a frequency domain that is used to transmit the data based at least in part on the identified RBs;

dynamically determining an allocation of RBs used to transmit control information in a control channel, the allocation of RBs based at least in part on the determined frequency width of the data channel such that a frequency width of the control channel is based on and matches the frequency width of the data channel in the frequency domain; and

transmitting the control information in the control channel to indicate a location of the data channel.

2. The method of claim 1, wherein dynamically determining the allocation of RBs further comprises:

repeating the control channel in the frequency domain.

3. The method of claim 2, further comprising:

repeating the control channel in time domain.

4. The method of claim 2, wherein a channel estimation of the control channel is performed based on a Listen Before Talk (LBT) sequence.

5. The method of claim 1, further comprising:

identifying a starting point and a length of the data transmitted in the data transmission; and

configuring the control information based at least in part on the starting point and the length of the data.

6. The method of claim 1, further comprising:

identifying a plurality of sub-channels used to transmit the data in the data transmission; and

dynamically determining the allocation of RBs used to transmit the control information based at least in part on the plurality of sub-channels.

7. The method of claim 1, further comprising:

determining a number of RBs used to transmit the data transmission, wherein dynamically determining the allocation of RBs used to transmit control information is based at least in part on the number of RBs used to transmit the data transmission.

8. The method of claim 1, wherein the allocation of RBs of the control channel comprises allocating a same number of allocated RBs used to transmit control information as a number of identified RBs used to transmit the data.

9. The method of claim 1, further comprising:

transmitting the data in the data channel in conjunction with transmitting the control information in the control channel.

10. The method of claim 9, wherein the control information comprises information bits configured according to the data transmission.

11. The method of claim 1, wherein the data transmission comprises a vehicle-to-everything (V2X) transmission or a vehicle-to-vehicle (V2V) transmission.

12. An apparatus for wireless communication, comprising:

means for identifying resource blocks (RBs) used to transmit data in a data transmission;

means for determining a frequency width of a data channel in a frequency domain that is used to transmit the data based at least in part on the identified RBs;

means for dynamically determining an allocation of RBs used to transmit control information in a control channel, the allocation of RBs based at least in part on the determined frequency width of the data channel such that a frequency width of the control channel is based on and matches the frequency width of the data channel in the frequency domain; and

means for transmitting the control information in the control channel to indicate a location of the data channel.

13. An apparatus for wireless communication, in a system comprising:

a processor;

memory in electronic communication with the processor; and

the processor and memory configured to;

identify resource blocks (RBs) used to transmit data in a data transmission;

determine a frequency width of a data channel in a frequency domain that is used to transmit the data based at least in part on the identified RBs;

dynamically determine an allocation of RBs used to transmit control information in a control channel, the allocation of RBs based at least in part on the determined frequency width of the data channel such that a frequency width of the control channel is based on and matches the frequency width of the data channel in the frequency domain; and

transmit the control information in the control channel to indicate a location of the data channel.

14. The apparatus of claim 13, wherein dynamically determining the allocation of RBs further comprises:

repeating the control channel in the frequency domain.

15. The apparatus of claim 14, wherein the processor and memory are further configured to:

repeat the control channel in time domain.

16. The apparatus of claim 14, wherein a channel estimation of the control channel is performed based on a Listen Before Talk (LBT) sequence.

17. The apparatus of claim 13, wherein the processor and memory are further configured to:

identify a starting point and a length of the data transmitted in the data transmission; and

configure the control information based at least in part on the starting point and the length of the data.

18. The apparatus of claim 13, wherein the processor and memory are further configured to:

identify a plurality of sub-channels used to transmit the data in the data transmission; and

dynamically determine the allocation of RBs used to transmit the control information based at least in part on the plurality of sub-channels.

19. The apparatus of claim 13, wherein the processor and memory are further configured to:

determine a number of RBs used to transmit the data transmission, wherein dynamically determining the allocation of RBs used to transmit control information is based at least in part on the number of RBs used to transmit the data transmission.

20. The apparatus of claim 13, wherein the allocation of RBs of the control channel comprises allocating a same number of allocated RBs used to transmit control information as a number of identified RBs used to transmit the data.

21. The apparatus of claim 13, wherein the processor and memory are further configured to:

transmit the data in the data channel in conjunction with transmitting the control information in the control channel.

22. The apparatus of claim 21, wherein the control information comprises information bits configured according to the data transmission.

23. The apparatus of claim 13, wherein the data transmission comprises a vehicle-to-everything (V2X) transmission or a vehicle-to-vehicle (V2V) transmission.

24. A non-transitory computer readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

identify resource blocks (RBs) used to transmit data in a data transmission;

determine a frequency width of a data channel in a frequency domain that is used to transmit the data based at least in part on the identified RBs;

dynamically determine an allocation of RBs used to transmit control information in a control channel, the allocation of RBs based at least in part on the determined frequency width of the data channel such that a frequency width of the control channel is based on and matches the frequency width of the data channel in the frequency domain; and

transmit the control information in the control channel to indicate a location of the data channel.

25. The non-transitory computer-readable medium of claim 24, wherein dynamically determining the allocation of RBs further comprises:

repeating the control channel in the frequency domain.

26. The non-transitory computer readable medium of claim 25, wherein the instructions are further executable by the processor to:

repeat the control channel in time domain.

27. The non-transitory computer readable medium of claim 25, wherein a channel estimation of the control channel is performed based on a Listen Before Talk (LBT) sequence.

28. The non-transitory computer-readable medium of claim 24, wherein the instructions are further executable by the processor to:

identify a starting point and a length of the data transmitted in the data transmission; and

configure the control information based at least in part on the starting point and the length of the data.

29. The non-transitory computer-readable medium of claim 24, wherein the instructions are further executable by the processor to:

identify a plurality of sub-channels used to transmit the data in the data transmission; and

dynamically determine the allocation of RBs used to transmit the control information based at least in part on the plurality of sub-channels.

30. The non-transitory computer-readable medium of claim 24, wherein the instructions are further executable by the processor to:

determine a number of RBs used to transmit the data transmission, wherein dynamically determining the allocation of RBs used to transmit control information is based at least in part on the number of RBs used to transmit the data transmission.