UPLINK CHANNEL SELECTION USING CHANNEL INTERFERENCE TOLERANCE LEVEL FEEDBACK FOR GRANTLESS DATA TRANSMISSION

• US 20170164390A1
• Filed: 06/20/2016
• Published: 06/08/2017
• Est. Priority Date: 12/02/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Park, Seyong, Zeng, Wei, Soriaga, Joseph Binamira, Ji, Tingfang
• Granted Patent: US 10,045,368 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal

Abstract

Aspects of the present disclosure provide for a network assisted grantless data transmission method operable in a wireless communication network. A wireless device may transmit grantless data without requesting a scheduling entity to grant and schedule network resources prior to the grantless data transmission. A scheduling entity determines interference tolerance information of a plurality of uplink channels, wherein the interference tolerance information is configured to individually indicate an availability of each of the plurality of uplink channels for grantless uplink data transmission. The scheduling entity broadcasts the interference tolerance information to one or more subordinate entities or wireless devices.

Claims

1. A method of operating a scheduling entity in a wireless communication network, the method comprising:

determining interference tolerance information of a plurality of uplink channels, wherein the interference tolerance information is configured to individually indicate an availability of each of the plurality of uplink channels for grantless uplink data transmission;

broadcasting the interference tolerance information to one or more subordinate entities; and

receiving a grantless uplink data transmission from the one or more subordinate entities utilizing one or more of the plurality of uplink channels according to the interference tolerance information.

2. The method of claim 1, wherein the interference tolerance information is further configured to indicate two or more levels of different grantless access for each of the plurality of uplink channels.

3. The method of claim 2, wherein the two or more levels of different grantless access comprise:

a first level indicating grantless access not allowed;

a second level indicating grantless access allowed with a constraint; and

a third level indicating grantless access allowed without constraint.

4. The method of claim 3, wherein the constraint comprises a modulation and coding scheme (MCS) limit for transmitting data through the plurality of uplink channels.

5. The method of claim 1, wherein the broadcasting comprises broadcasting the interference tolerance information once or more for a predetermined number of subframes of a control channel.

6. The method of claim 1, wherein the broadcasting comprises broadcasting the interference tolerance information at a rate based on a loading of the plurality of uplink channels.

7. The method of claim 1, wherein the broadcasting comprises broadcasting the interference tolerance information in a downlink control channel.

8. The method of claim 1, wherein the determining interference tolerance information comprises:

determining a loading of a channel of the plurality of uplink channels;

if the loading is greater than a first threshold, setting the interference tolerance information of the channel to indicate no grantless access;

if the loading is less than the first threshold and greater than a second threshold, setting the interference tolerance information of the channel to indicate grantless access with a constraint; and

if the loading is less than the second threshold, setting the interference tolerance information of the channel to indicate grantless access without constraint.

21. The scheduling entity of claim 4, wherein the processor is further configured by executing the code to:

determine a loading of a channel of the plurality of channels;

if the loading is greater than a first threshold, set the interference tolerance information of the channel to indicate no grantless access;

if the loading is less than the first threshold and greater than a second threshold, set the interference tolerance information of the channel to indicate grantless access with a constraint; and

if the loading is less than the second threshold, set the interference tolerance information of the channel to indicate grantless access without constraint.

9. A method of operating a subordinate entity in a wireless communication network, the method comprising:

determining channel qualities of a plurality of uplink channels and corresponding modulation and coding schemes (MCSs) supportable by the channel qualities;

receiving an interference tolerance information broadcast from a scheduling entity, wherein the interference tolerance information is configured to individually indicate an availability of each of the plurality of uplink channels for grantless data transmission;

selecting an uplink channel among the plurality of uplink channels and an MCS among the corresponding MCSs based on the received interference tolerance information; and

transmitting grantless data utilizing the selected uplink channel and MCS.

10. The method of claim 9, wherein the interference tolerance information is further configured to indicate two or more levels of different grantless access for each of the plurality of uplink channels.

11. The method of claim 10, wherein the two or more levels of different grantless access comprise:

a first level indicating grantless access not allowed;

a second level indicating grantless access allowed with constraint; and

a third level indicating grantless access allowed without constraint.

12. The method of claim 11, wherein the constraint comprises an MCS limit.

13. The method of claim 9, wherein the receiving the interference tolerance information comprises receiving the interference tolerance information in a downlink control channel.

14. A scheduling entity in a wireless communication network, comprising:

a computer-readable medium stored with executable code;

a communication interface configured for wireless communication; and

a processor operatively coupled to the communication interface and computer-readable medium,

wherein the processor is configured by executing the code to;

determine interference tolerance information of a plurality of uplink channels, wherein the interference tolerance information is configured to individually indicate an availability of each of the plurality of uplink channels for grantless uplink data transmission;

broadcast the interference tolerance information to one or more subordinate entities; and

receive a grantless uplink data transmission from the one or more subordinate entities utilizing one or more of the plurality of uplink channels according to the interference tolerance information.

15. The scheduling entity of claim 14, wherein the interference tolerance information is further configured to indicate two or more levels of different grantless access for the plurality of uplink channels.

16. The scheduling entity of claim 15, wherein the two or more levels of grantless access comprise:

a first level indicating grantless access not allowed;

a second level indicating grantless access allowed with constraint; and

a third level indicating grantless access allowed without constraint.

17. The scheduling entity of claim 16, wherein the constraint comprises a modulation and coding scheme (MCS) limit for transmitting data through an uplink channel.

18. The scheduling entity of claim 14, wherein the processor is further configured by executing the code to:

broadcast the interference tolerance information once or more for a predetermined number of subframes of a control channel.

19. The scheduling entity of claim 14, wherein the processor is further configured by executing the code to:

broadcast the interference tolerance information at a rate based on a loading of the plurality of uplink channels.

20. The scheduling entity of claim 14, wherein the processor is further configured by executing the code to:

broadcast the interference tolerance information in a downlink control channel.

22. A subordinate entity in a wireless communication network, comprising:

a computer-readable medium stored with executable code;

a communication interface configured for wireless communication; and

a processor operatively coupled to the communication interface and computer-readable medium,

wherein the processor is configured by executing the code to;

determine channel qualities of a plurality of uplink channels and corresponding modulation and coding schemes (MCSs) supportable by the channel qualities;

receive an interference tolerance information broadcast from a scheduling entity, wherein the interference tolerance information is configured to individually indicate an availability of each of the plurality of uplink channels for grantless data transmission;

select an uplink channel among the plurality of uplink channels and an MCS among the corresponding MCSs based on the received interference tolerance information; and

transmit grantless data utilizing the selected uplink channel and MCS.

23. The subordinate entity of claim 22, wherein the interference tolerance information is further configured to indicate two or more levels of different grantless access for each of the plurality of uplink channels.

24. The subordinate entity of claim 23, wherein the two or more levels of grantless access comprise:

a first level indicating grantless access not allowed;

a second level indicating grantless access allowed with constraint; and

a third level indicating grantless access allowed without constraint.

25. The subordinate entity of claim 24, wherein the constraint comprises an MCS limit.

26. The subordinate entity of claim 22, wherein the processor is further configured by executing the code to:

receive the interference tolerance information in a downlink control channel.