CELLULAR VEHICLE-TO-EVERYTHING DESIGN PRINCIPLES

• US 20180332620A1
• Filed: 05/09/2018
• Published: 11/15/2018
• Est. Priority Date: 05/10/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Malladi, Durga Prasad, Patil, Shailesh
• Granted Patent: US 11,166,312 B2
• Time in Patent Office: Days
• 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: H04W 16/28 using beam steering
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 74/0816 with collision avoidance
• CPC Class Codes: H04W 84/005 Moving wireless networks

Abstract

Methods, systems, and devices for wireless communication are described. A 5G device may decode a control channel transmission of a safety message in a vehicle-to-everything system during a first portion of a time period. The 5G device may identify, based at least in part on the decoding, a pool of resource blocks (RBs) that are available for the time period. The 5G device may select a subset of RBs from the available pool of RBs for a transmission during a second portion of the time period.

Claims

1. A method for wireless communication, comprising:

decoding a control channel transmission of a safety message in a vehicle-to-everything (V2X) system during a first portion of a time period;

identifying, based at least in part on the decoding, a pool of resource blocks (RBs) that are available for the time period; and

selecting a subset of RBs from the available pool of RBs for a transmission during a second portion of the time period.

2. The method of claim 1, further comprising:

monitoring a plurality of channels during the first portion of the time period, the channels associated with control channel transmissions; and

decoding the one or more control channels based at least in part on the monitoring.

3. The method of claim 1, further comprising:

determining, based at least in part on the decoding, a time and frequency resources allocated for data transmissions scheduled during the time period and at least one subsequent time period; and

identifying the pool of RBs based at least in part on the determining.

4. The method of claim 1, further comprising:

identifying, based at least in part on the decoding, an ordered list of available RBs for the pool of RBs; and

selecting, according to the ordered list, the subset of RBs.

5. The method of claim 1, further comprising:

selecting, according to a random selection scheme, the subset of RBs.

6. The method of claim 1, further comprising:

hashing, based at least in part on a user equipment (UE) identifier and a RB index, the RBs in the pool of RBs; and

selecting, according to the hashing, the subset of RBs.

7. The method of claim 1, further comprising:

selecting the subset of RBs according to an ordered list of the RBs in the pool of RBs, a random selection scheme, a RB index hashed to a user equipment (UE) identifier, or combinations thereof.

8. The method of claim 1, wherein:

the transmission during the second portion of the time period comprises a unicast transmission, a broadcast transmission, or combinations thereof.

9. The method of claim 1, wherein:

the transmission during the second portion of the time period comprises a vehicle-to-everything (V2X) transmission.

10. A method for wireless communication, comprising:

identifying, by a first device configured to communicate using a first radio access technology (RAT), a shared radio frequency spectrum band that is shared between the first device and a second device that is configured to communicate using a second RAT;

generating a preamble for transmission on the shared radio frequency spectrum band, the preamble configured to be decodable by the second device of the second RAT and conveying an indication of a transmission by the first device using the first RAT; and

transmitting the configured preamble prior to the transmission using the first RAT.

11. The method of claim 10, further comprising:

configuring at least one of a network allocation vector (NAV) or a transmission opportunity (TxOP) parameter in the preamble to convey an indication of a transmission duration for the transmission by the first device using the first RAT.

12. The method of claim 10, wherein:

the first RAT has a higher transmission priority than the second RAT.

13. The method of claim 10, wherein:

the first RAT comprises a vehicle-to-everything (V2X) RAT and the second RAT comprises one or more of a Wi-Fi RAT, a long term evolution (LTE) license assisted access (LTE-LAA) RAT, an enhanced LTE-LAA RAT, and a multi-fire RAT.

14. The method of claim 10, further comprising:

selecting a bandwidth for the transmission by the first device using the first RAT; and

configuring the preamble to convey an indication of the bandwidth.

15. The method of claim 10, further comprising:

performing a listen-before-talk (LBT) procedure prior to the transmission by the first device using the first RAT; and

performing a backoff procedure when the LBT procedure indicates that the shared radio frequency spectrum band is occupied.

16. The method of claim 10, wherein:

the transmission by the first device using the first RAT comprises a unicast transmission, a broadcast transmission, or combinations thereof.

17. The method of claim 10, wherein:

the transmission by the first device using the first RAT comprises a vehicle-to-everything (V2X) transmission.

18. A method for wireless communication, comprising:

identifying a shared radio frequency spectrum band that is shared between a first device that is configured to communicate using a first radio access technology (RAT) and a second device that is configured to communicate using a second RAT;

identifying, by the second device, a first transmission opportunity (TxOP) duration associated with the first RAT; and

selecting, based at least in part on the first TxOP duration, a second TxOP duration for communications on the shared radio frequency spectrum band, wherein the second TxOP duration is smaller than the first TxOP duration.

19. The method of claim 18, further comprising:

performing one or more communications on the shared radio frequency spectrum band using the second TxOP.

20. The method of claim 18, wherein:

the first RAT comprises a vehicle-to-everything (V2X) RAT and the second RAT comprises one or more of a Wi-Fi RAT, a long term evolution (LTE) license assisted access (LTE-LAA) RAT, an enhanced LTE-LAA RAT, and a multi-fire RAT.

21. 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;

decode a control channel transmission of a safety message in a vehicle-to-everything (V2X) system during a first portion of a time period;

identify, based at least in part on the decoding, a pool of resource blocks (RBs) that are available for the time period; and

select a subset of RBs from the available pool of RBs for a transmission during a second portion of the time period.

22. The apparatus of claim 21, wherein the instructions are further executable by the processor to:

monitor a plurality of channels during the first portion of the time period, the channels associated with control channel transmissions; and

decode the one or more control channels based at least in part on the monitoring.

23. The apparatus of claim 21, wherein the instructions are further executable by the processor to:

determine, based at least in part on the decoding, a time and frequency resources allocated for data transmissions scheduled during the time period and at least one subsequent time period; and

identify the pool of RBs based at least in part on the determining.

24. The apparatus of claim 21, wherein the instructions are further executable by the processor to:

identify, based at least in part on the decoding, an ordered list of available RBs for the pool of RBs; and

select, according to the ordered list, the subset of RBs.

25. The apparatus of claim 21, wherein the instructions are further executable by the processor to:

select, according to a random selection scheme, the subset of RBs.

26. The apparatus of claim 21, wherein the instructions are further executable by the processor to:

hash, based at least in part on a user equipment (UE) identifier and a RB index, the RBs in the pool of RBs; and

select, according to the hashing, the subset of RBs.

27. The apparatus of claim 21, wherein the instructions are further executable by the processor to:

select the subset of RBs according to an ordered list of the RBs in the pool of RBs, a random selection scheme, a RB index hashed to a user equipment (UE) identifier, or combinations thereof.

28. The apparatus of claim 21, wherein:

the transmission during the second portion of the time period comprises a unicast transmission, a broadcast transmission, or combinations thereof.

29. The apparatus of claim 21, wherein:

the transmission during the second portion of the time period comprises a vehicle-to-everything (V2X) transmission.