Identification of colliding UE for grant-free transmission of data and scheduling request based on resource sub-pool assignments for wireless networks

• US 10,383,140 B2
• Filed: 06/23/2017
• Issued: 08/13/2019
• Est. Priority Date: 06/23/2017
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Technologies Oy (Nokia Corporation)
• Inventors: Li, Zexian, Singh, Bikramjit, Van Phan, Vinh, Farag, Emad, Yu, Ling, Uusitalo, Mikko Aleksi
• Primary Examiner(s): Crompton, Christopher R
• Application Number:
  US15/631,648
• Publication Number:
  US 20180376493A1
• Time in Patent Office: 781 Days
• Field of Search: 370329
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• 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 72/542 using measured or perceived quality
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

A technique includes receiving, by a first user device from a base station, control information indicating an assignment of the first user device to a first scheduling request sub-pool of resources of one or more scheduling request sub-pools, and an assignment of the first user device to a first data sub-pool of resources of one or more data sub-pools, wherein the sub-pools assigned to the first user device allow a contention-based grant-free mode transmission from the first user device of both a data and a scheduling request at the same time via different resources, wherein for at least a plurality of user devices no two user devices are assigned to both a same data sub-pool and a same scheduling request sub-pool.

Claims

1. A method comprising:

receiving, by a first user device from a base station, control information indicating an assignment of the first user device to a first scheduling request sub-pool of resources of one or more scheduling request sub-pools, and an assignment of the first user device to a first data sub-pool of resources of one or more data sub-pools, wherein the sub-pools assigned to the first user device allow a contention-based grant-free mode transmission from the first user device of both a data and a scheduling request via different resources;

wherein for at least a plurality of user devices, no two user devices are assigned to both a same data sub-pool and a same scheduling request sub-pool to allow the base station to detect a collision condition for the first user device with respect to both data and a scheduling request, in which a grant-free mode transmission of both a data and a scheduling request at the same time from the first user device collided with uplink transmissions from other user devices.

2. The method of claim 1 and further comprising:

performing, by the first user device, a contention-based grant-free mode transmission at the same time of both a data, via a resource of the assigned first data sub-pool, and a scheduling request, via a resource of the first scheduling request sub-pool.

3. A method of claim 1 and further comprising:

receiving, by the first user device from the base station, an uplink grant that identifies a dedicated resource for the first user device to retransmit the data;

retransmitting, by the first user device to the base station, the data via the dedicated resource.

4. The method of claim 1 wherein the assignment for the first user device comprises a dedicated resource that is dedicated to the first user device and is not shared among multiple user devices, the dedicated resource being from either the first scheduling request sub-pool or the first the data sub-pool.

5. An apparatus comprising at least one processor and at least one memory including computer instructions, when executed by the at least one processor, cause the apparatus to:

receive, by a first user device from a base station, control information indicating an assignment of the first user device to a first scheduling request sub-pool of resources of one or more scheduling request sub-pools, and an assignment of the first user device to a first data sub-pool of resources of one or more data sub-pools, wherein the sub-pools assigned to the first user device allow a contention-based grant-free mode transmission from the first user device of both a data and a scheduling request via different resources;

wherein for at least a plurality of user devices, no two user devices are assigned to both a same data sub-pool and a same scheduling request sub-pool to allow the base station to detect a collision condition for the first user device with respect to both data and a scheduling request, in which a grant-free mode transmission of both a data and a scheduling request at the same time from the first user device collided with uplink transmissions from other user devices.

6. A method comprising:

determining, by a base station, a hierarchical resource pool configuration to allow each of one or more user devices to use a contention-based grant-free mode to transmit both data and a scheduling request to the base station via different resources, the hierarchical resource pool configuration including a scheduling request pool that includes one or more scheduling request sub-pools, each scheduling request sub-pool including one or more resources to be used by a user device for an uplink transmission of a scheduling request, and a data pool that includes one or more data sub-pools, each of the data sub-pools including one or more resources to be used by a user device for an uplink transmission of data;

the hierarchical resource pool configuration also including an assignment of each of a plurality of user devices served by the base station to one scheduling request sub-pool and to one data sub-pool, wherein no two user devices are assigned to a same sub-pool in both the scheduling request pool and the data pool to allow the base station to identify a failed user device in which grant-free mode transmissions of both data and a scheduling request from the failed user device collided with transmissions from other user devices; and

sending, by the base station, control information indicating the assignment of each of one or more user devices to a scheduling request sub-pool and a data sub-pool.

7. The method of claim 6 and further comprising:

determining, based on at least one received data and at least one received scheduling request and the assignment of user devices to one or more scheduling request sub-pools and assignment of user devices to one or more data sub-pools, that both data and a scheduling request transmitted from the failed user device collided with transmissions from other user devices; and

transmitting, by the base station in response to determining that both data and a scheduling request transmitted from the failed user device collided with transmissions from other user devices, an uplink grant to the failed user device.

8. The method of claim 6 and further comprising:

receiving, by the base station, a first scheduling request, but not first data, from a first user device that transmitted both the first scheduling request and the first data at the same time using a grant-free mode;

receiving, by the base station, a second data, but not a second scheduling request, from a second user device that transmitted both the second scheduling request and the second data at the same time using a grant-free mode;

determining a first set of user devices that share a data sub-pool with the first user device and a second set of user devices that share a scheduling request sub-pool with the second user device;

determining that an overlap of the first set of user devices and the second set of user devices includes the failed user device; and

determining, based on the overlap of the first and second sets of user devices, that both data and a scheduling request transmitted from the failed user device collided with the first data transmitted by the first user device and the second scheduling request transmitted by the second user device, respectively.

9. The method of claim 6 and further comprising:

detecting, by the base station, a change in a number of user devices served by the base station;

determining, by the base station in response to the detecting of a change in a number of user devices served by the base station, an updated hierarchical resource pool configuration including at least an updated assignment of each of one or more user devices to a scheduling request sub-pool and a data sub-pool; and

sending, by the base station, control information indicating the updated assignment of each of one or more user devices to a scheduling request sub-pool and a data sub-pool.

10. The method of claim 9 wherein the determining an updated hierarchical resource pool configuration comprises performing one or more of the following:

changing a number of data sub-pools in the data pool;

changing a number of resources in one or more data sub-pools;

changing an assignment of one or more user devices to one or more of the data sub-pools;

changing a number of scheduling request sub-pools in the scheduling request pool;

changing a number of resources in one or more scheduling request sub-pools; and

changing an assignment of one or more user devices to one or more of the data sub-pools.

11. The method of claim 6 wherein the hierarchical resource pool configuration also includes a dedicated resource, within either the assigned scheduling request sub-pool or the assigned data pool for a user device, for each of one or more user devices served by the base station.

12. An apparatus comprising at least one processor and at least one memory including computer instructions, when executed by the at least one processor, cause the apparatus to:

determine, by a base station, a hierarchical resource pool configuration to allow each of one or more user devices to use a contention-based grant-free mode to transmit both data and a scheduling request to the base station via different resources, the hierarchical resource pool configuration including a scheduling request pool that includes one or more scheduling request sub-pools, each scheduling request sub-pool including one or more resources to be used by a user device for an uplink transmission of a scheduling request, and a data pool that includes one or more data sub-pools, each of the data sub-pools including one or more resources to be used by a user device for an uplink transmission of data;

the hierarchical resource pool configuration also including an assignment of each of a plurality of user devices served by the base station to one scheduling request sub-pool and to one data sub-pool, wherein no two user devices are assigned to a same sub-pool in both the scheduling request pool and the data pool to allow the base station to identify a failed user device in which grant-free mode transmissions of both data and a scheduling request from the failed user device collided with transmissions from other user devices; and

send, by the base station, control information indicating the assignment of each of one or more user devices to a scheduling request sub-pool and a data sub-pool.

13. A computer program product comprising a non-transitory computer-readable storage medium, the computer-readable storage medium storing executable code that, when executed by at least one data processing apparatus, is configured to cause the at least one data processing apparatus to perform a method of:

determining, by a base station, a hierarchical resource pool configuration to allow each of one or more user devices to use a contention-based grant-free mode to transmit both data and a scheduling request to the base station via different resources, the hierarchical resource pool configuration including a scheduling request pool that includes one or more scheduling request sub-pools, each scheduling request sub-pool including one or more resources to be used by a user device for an uplink transmission of a scheduling request, and a data pool that includes one or more data sub-pools, each of the data sub-pools including one or more resources to be used by a user device for an uplink transmission of data;

the hierarchical resource pool configuration also including an assignment of each of a plurality of user devices served by the base station to one scheduling request sub-pool and to one data sub-pool, wherein no two user devices are assigned to a same sub-pool in both the scheduling request pool and the data pool to allow the base station to identify a failed user device in which grant-free mode transmissions of both data and a scheduling request from the failed user device collided with transmissions from other user devices; and

sending, by the base station, control information indicating the assignment of each of one or more user devices to a scheduling request sub-pool and a data sub-pool.

14. A method comprising:

receiving, by a first user device from a base station, control information indicating an assignment of the first user device to a first scheduling request sub-pool of one or more scheduling request sub-pools, and an assignment of the first user device to a first data sub-pool of one or more data sub-pools;

wherein the one or more scheduling request sub-pools and the one or more data sub-pools are configured to allow each of one or more user devices to use a contention-based grant-free mode to transmit both data, via a resource of an assigned data sub-pool, and a scheduling request, via a resource of an assigned scheduling request sub-pool, to the base station, wherein no two user devices are assigned to both a same data sub-pool and a same scheduling request sub-pool to allow the base station to identify a failed user device in which grant-free mode transmissions of both data and a scheduling request from the failed user device collided with uplink transmissions from other user devices; and

transmitting, by the first user device using a contention-based grant-free mode, both a first scheduling request via a resource of the first scheduling request sub-pool that is assigned to the first user device and a first data via a resource of the first data sub-pool that is assigned to the first user device.

15. A method of claim 14 and further comprising:

receiving, by the first user device from the base station in response to the base station detecting that both the first scheduling request and the first data transmitted by the first user device collided with transmissions from other user devices, an uplink grant that identifies a dedicated resource for the first user device to retransmit the first data;

retransmitting, by the first user device to the base station, the first data via the dedicated resource.

16. The method of claim 14 wherein the retransmitting comprises at least one of the following:

performing a HARQ (hybrid ARQ) retransmission of a same redundancy version of the first data via the dedicated resource; and

performing a HARQ (hybrid ARQ) retransmission of a different redundancy version of the first data via the dedicated resource.

17. The method of claim 14 wherein the hierarchical resource pool configuration also includes a dedicated resource, within either the assigned scheduling request sub-pool or the assigned data pool for a user device, for each of one or more user devices served by the base station.

18. An apparatus comprising at least one processor and at least one memory including computer instructions, when executed by the at least one processor, cause the apparatus to:

receive, by a first user device from a base station, control information indicating an assignment of the first user device to a first scheduling request sub-pool of one or more scheduling request sub-pools, and an assignment of the first user device to a first data sub-pool of one or more data sub-pools;

wherein the one or more scheduling request sub-pools and the one or more data sub-pools are configured to allow each of one or more user devices to use a contention-based grant-free mode to transmit both data, via a resource of an assigned data sub-pool, and a scheduling request, via a resource of an assigned scheduling request sub-pool, to the base station, wherein no two user devices are assigned to both a same data sub-pool and a same scheduling request sub-pool to allow the base station to identify a failed user device in which grant-free mode transmissions of both data and a scheduling request from the failed user device collided with uplink transmissions from other user devices; and

transmit, by the first user device using a contention-based grant-free mode, both a first scheduling request via a resource of the first scheduling request sub-pool that is assigned to the first user device and a first data via a resource of the first data sub-pool that is assigned to the first user device.

19. A computer program product comprising a non-transitory computer-readable storage medium, the computer-readable storage medium storing executable code that, when executed by at least one data processing apparatus, is configured to cause the at least one data processing apparatus to perform a method of:

receiving, by a first user device from a base station, control information indicating an assignment of the first user device to a first scheduling request sub-pool of one or more scheduling request sub-pools, and an assignment of the first user device to a first data sub-pool of one or more data sub-pools;

wherein the one or more scheduling request sub-pools and the one or more data sub-pools are configured to allow each of one or more user devices to use a contention-based grant-free mode to transmit both data, via a resource of an assigned data sub-pool, and a scheduling request, via a resource of an assigned scheduling request sub-pool, to the base station, wherein no two user devices are assigned to both a same data sub-pool and a same scheduling request sub-pool to allow the base station to identify a failed user device in which grant-free mode transmissions of both data and a scheduling request from the failed user device collided with uplink transmissions from other user devices; and

transmitting, by the first user device using a contention-based grant-free mode, both a first scheduling request via a resource of the first scheduling request sub-pool that is assigned to the first user device and a first data via a resource of the first data sub-pool that is assigned to the first user device.

20. A method comprising:

receiving, by a first user device from a base station, control information indicating an assignment of the first user device to a scheduling request sub-pool of resources and to a data sub-pool of resources, wherein the sub-pools of resources assigned to the first user device allow a contention-based grant-free mode of transmission from the first user device of both a data and a scheduling request via different resources, wherein for at least a plurality of user devices, no two user devices are assigned to both a same data sub-pool and a same scheduling request sub-pool to allow the base station to detect a collision condition for the first user device with respect to both data and a scheduling request, in which a grant-free mode transmission of both a data and a scheduling request at the same time from the first user device collided with uplink transmissions from other user devices; and

performing, by the first user device, a contention-based grant-free mode of transmission of data via a resource of the data sub-pool and a scheduling request via a resource of the scheduling request sub-pool.

21. The method of claim 20 wherein the performing comprises:

performing, by the first user device, a contention-based grant-free mode of transmission, at the same time, of both data via a resource of the data sub-pool and a scheduling request via a resource of the scheduling request sub-pool.

22. The method of claim 20 and further comprising:

receiving, by the first user device from the base station in response to the base station detecting that both the scheduling request and the data transmitted by the first user device collided with transmissions from other user devices, an uplink grant that identifies a dedicated resource for the first user device to retransmit the first data;

retransmitting, by the first user device to the base station, the data via the dedicated resource.

23. A method comprising:

sending, by a base station to a first user device, control information indicating an assignment of the first user device to a scheduling request sub-pool of resources and to a data sub-pool of resources, wherein the sub-pools of resources assigned to the first user device allow a contention-based grant-free mode of transmission from the first user device of both a data and a scheduling request via different resources, wherein for at least a plurality of user devices no two user devices are assigned to both a same data sub-pool and a same scheduling request sub-pool to allow the base station to detect a collision condition for the first user device with respect to both data and a scheduling request, in which a grant-free mode transmission of both a data and a scheduling request at the same time from the first user device collided with uplink transmissions from other user devices.

24. The method of claim 23 and further comprising:

receiving, by the base station from the first user device, a contention-based grant-free transmission of data via a resource of the data pool and a scheduling request via a resource of the scheduling request pool.

25. A method of claim 23 and further comprising:

determining, by the base station, that both the scheduling request and the data transmitted by the first user device collided with transmissions from other user devices; and

sending, by the base station to the user device in response to the base station detecting that both the scheduling request and the data transmitted by the first user device collided with transmissions from other user devices, an uplink grant that identifies a dedicated resource for the first user device to retransmit the data.

26. A method of claim 25 and further comprising:

receiving, by the base station from the user, the data via the dedicated resource.

27. A computer program product comprising a non-transitory computer-readable storage medium, the computer-readable storage medium storing executable code that, when executed by at least one data processing apparatus, is configured to cause the at least one data processing apparatus to perform a method of:

receiving, by a first user device from a base station, control information indicating an assignment of the first user device to a first scheduling request sub-pool of resources of one or more scheduling request sub-pools, and an assignment of the first user device to a first data sub-pool of resources of one or more data sub-pools, wherein the sub-pools assigned to the first user device allow a contention-based grant-free mode transmission from the first user device of both a data and a scheduling request via different resources;

wherein for at least a plurality of user devices, no two user devices are assigned to both a same data sub-pool and a same scheduling request sub-pool to allow the base station to detect a collision condition for the first user device with respect to both data and a scheduling request, in which a grant-free mode transmission of both a data and a scheduling request at the same time from the first user device collided with uplink transmissions from other user devices.