DISTRIBUTED SCHEDULING TO CONTROL INTERFERENCE FOR DATA TRANSACTIONS USING GRANT-LESS TRANSMISSIONS

• US 20160270102A1
• Filed: 10/29/2015
• Published: 09/15/2016
• Est. Priority Date: 03/14/2015
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: ZENG, Wei, SORIAGA, Joesph Binamira, JI, Tingfang, SMEE, John Edward, BHUSHAN, Naga
• Application Number:
  US14/926,065
• Publication Number:
  US 20160270102A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 52/262 taking into account adaptive modulation and coding [AMC] scheme AMC per se H04L1/0001
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• 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 72/535 based on resource usage policies
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

Certain aspects of the present disclosure generally relate to techniques for distributed scheduling to control interference for small data transactions using grant-less transmissions. A method for wireless communications by wireless node is provided. The method generally includes receiving, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference, determining a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter, selecting access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions, and transmitting the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.

Claims

1. A method for wireless communications by a wireless node, comprising:

receiving, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference;

determining a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter;

selecting access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions; and

transmitting the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.

2. The method of claim 1, wherein determining the data rate comprises:

calculating a transmission power associated with each of one or more of the supported MCS; and

selecting an MCS that is associated with a calculated transmission power that does not exceed a transmission power used for the grant-less transmission.

3. The method of claim 1, wherein:

the at least one parameter to control interference comprises a maximum duration for grant-less transmission; and

determining the duration for the grant-less transmission comprises selecting a duration for the grant-less transmission that does not exceed the maximum duration for grant-less transmission.

4. The method of claim 1, wherein:

the at least one parameter to control interference comprises a maximum payload size for grant-less transmission regardless of the selected MCS or a maximum payload size for grant-less transmission at each supported MCS; and

determining the duration for the grant-less transmission comprises determining a duration corresponding to the maximum payload size for the MCS corresponding to the determined data rate.

5. The method of claim 1, wherein:

the grant-less transmission is transmitted using multiple component carriers (CCs); and

the data rate and the duration for the grant-less transmission are determined per-CC.

6. The method of claim 5, wherein transmitting the grant-less transmission over multiple carriers comprises:

transmitting a first portion of the grant-less transmission on a first CC using a first determined data rate and a first determined duration, and

transmitting a second portion of the grant-less transmission on a second CC using a second determined data rate and a second determined duration.

7. The method of claim 1, wherein the grant-less transmission is transmitted using a single component carrier (CC).

8. The method of claim 1, wherein the access resources comprise a scrambling code or an interleaver and access time.

9. The method of claim 1, further comprising including an identification of the wireless node with the grant-less transmission.

10. An apparatus for wireless communications by a wireless node, comprising:

a receiver configured to receive, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference;

at least one processor configured to determine a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter, and select access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions; and

a transmitter configured to transmit the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.

11. The apparatus of claim 10, wherein the at least one processor is configured to determine the data rate by:

calculating a transmission power associated with each of one or more of the supported MCS; and

selecting an MCS that is associated with a calculated transmission power that does not exceed a transmission power used for the grant-less transmission.

12. The apparatus of claim 10, wherein:

the at least one parameter to control interference comprises a maximum duration for grant-less transmission; and

the at least one processor is configured to determine the duration for the grant-less transmission by selecting a duration for the grant-less transmission that does not exceed the maximum duration for grant-less transmission.

13. The apparatus of claim 10, wherein:

the at least one parameter to control interference comprises a maximum payload size for grant-less transmission regardless of the selected MCS or a maximum payload size for grant-less transmission at each supported MCS; and

the at least one processor is configured to determine the duration for the grant-less transmission by determining a duration corresponding to the maximum payload size for the MCS corresponding to the determined data rate.

14. The apparatus of claim 10, wherein:

the transmitter is configured to transmit the grant-less transmission using multiple component carriers (CCs); and

the at least one processor is configured to determine the data rate and the duration for the grant-less transmission per-CC.

15. The apparatus of claim 14, wherein the transmitter is configured to transmit the grant-less transmission over multiple carriers by:

transmitting a first portion of the grant-less transmission on a first CC using a first determined data rate and a first determined duration, and

transmitting a second portion of the grant-less transmission on a second CC using a second determined data rate and a second determined duration.

16. The apparatus of claim 10, wherein the transmitter is configured to transmit the grant-less transmission using a single component carrier (CC).

17. The apparatus of claim 10, wherein the access resources comprise a scrambling code or an interleaver and access time.

18. The apparatus of claim 10, wherein the at least one processor is further configured to include an identification of the wireless node with the grant-less transmission.

19. An apparatus for wireless communications by a wireless node, comprising:

means for receiving, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference;

means for determining a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter;

means for selecting access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions; and

means for transmitting the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.

20. The apparatus of claim 19, wherein the means for determining the data rate comprises:

means for calculating a transmission power associated with each of one or more of the supported MCS; and

means for selecting an MCS that is associated with a calculated transmission power that does not exceed a transmission power used for the grant-less transmission.

21. The apparatus of claim 19, wherein:

the at least one parameter to control interference comprises a maximum duration for grant-less transmission; and

the means for determining the duration for the grant-less transmission comprises means for selecting a duration for the grant-less transmission that does not exceed the maximum duration for grant-less transmission.

22. The apparatus of claim 19, wherein:

the at least one parameter to control interference comprises a maximum payload size for grant-less transmission regardless of the selected MCS or a maximum payload size for grant-less transmission at each supported MCS; and

the means for determining the duration for the grant-less transmission comprises means for determining a duration corresponding to the maximum payload size for the MCS corresponding to the determined data rate.

23. The apparatus of claim 19, wherein:

the grant-less transmission is transmitted using multiple component carriers (CCs); and

the data rate and the duration for the grant-less transmission are determined per-CC.

24. The apparatus of claim 23, wherein the means for transmitting the grant-less transmission over multiple carriers comprises:

means for transmitting a first portion of the grant-less transmission on a first CC using a first determined data rate and a first determined duration, and

means for transmitting a second portion of the grant-less transmission on a second CC using a second determined data rate and a second determined duration.

25. A computer readable medium having computer executable code stored thereon for:

receiving, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference;

determining a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter;

selecting access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions; and

transmitting the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.

26. The computer readable medium of claim 25, wherein determining the data rate comprises:

calculating a transmission power associated with each of one or more of the supported MCS; and

selecting an MCS that is associated with a calculated transmission power that does not exceed a transmission power used for the grant-less transmission.

27. The computer readable medium of claim 25, wherein:

the at least one parameter to control interference comprises a maximum duration for grant-less transmission; and

determining the duration for the grant-less transmission comprises selecting a duration for the grant-less transmission that does not exceed the maximum duration for grant-less transmission.

28. The computer readable medium of claim 25, wherein:

the at least one parameter to control interference comprises a maximum payload size for grant-less transmission regardless of the selected MCS or a maximum payload size for grant-less transmission at each supported MCS; and

determining the duration for the grant-less transmission comprises determining a duration corresponding to the maximum payload size for the MCS corresponding to the determined data rate.

29. The computer readable medium of claim 25, wherein:

the grant-less transmission is transmitted using multiple component carriers (CCs); and

the data rate and the duration for the grant-less transmission are determined per-CC.

30. The computer readable medium of claim 29, wherein transmitting the grant-less transmission over multiple carriers comprises:

transmitting a first portion of the grant-less transmission on a first CC using a first determined data rate and a first determined duration, and

transmitting a second portion of the grant-less transmission on a second CC using a second determined data rate and a second determined duration.