Interference Avoidance in D2D Communications

• US 20160044486A1
• Filed: 08/07/2015
• Published: 02/11/2016
• Est. Priority Date: 08/08/2014
• Status: Active Grant

• Current Assignee: Koninklijke KPN NV, Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno
• Original Assignee: Koninklijke KPN NV, Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno
• Inventors: Pais, Adrian Victor, Jorguseski, Ljupco, Norp, Antonius Hendrikus Johannes, Almodovar Chico, Jose Luis
• Granted Patent: US 10,057,752 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 52/0209 in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for allocating radio resources for a D2D communication between a first device and a second device is disclosed. The method includes identifying device(s) relevant for the D2D communication between the first and second devices, obtaining location information for the identified device(s), determining a value of a distance parameter for each of the identified devices using the location information obtained for the device and one or both of location information for the first device and location information for the second device, and allocating one or more radio resources for the D2D communication between the first device and the second device based on the determined value of the distance parameter.

Claims

1. A computer-implemented method for allocating radio resources for a device-to-device (D2D) communication between a first D2D device and a second D2D device:

identifying one or more devices relevant for the D2D communication between the first D2D device and the second D2D device;

for each device of the identified devices, obtaining location information for the device;

for each device of the identified devices, using the location information obtained for the device and one or both of location information for the first D2D device and location information for the second D2D device, determining a distance parameter indicative of a distance between one of the device, a device pair comprising the device and a further entity or a further device with which the device is in communication, or a group of further devices comprising the device and a plurality of further entities or further devices with which the relevant device is in communication, and one of the first D2D device, the second D2D device, or a device pair comprising the first D2D device and the second D2D device; and

allocating one or more radio resources for the D2D communication between the first D2D device and the second D2D device based on the determined distance parameter.

2. The computer-implemented method according to claim 1, further comprising:

assessing D2D transmit power to be used by at least one of the first D2D device or the second D2D device for the D2D communication between the first D2D device and the second D2D device; and

for each device of the identified devices;

determining a victim interference parameter using the determined distance parameter and the assessed D2D transmit power, the victim interference parameter being indicative of an interference level at the device attributable to the D2D communication between the first D2D device and the second D2D device, and

determining whether the victim interference parameter satisfies a victim condition,

wherein the allocating comprises allocating one or more radio resources for the D2D communication between the first D2D device and the second D2D device based on radio resources allocated to the one or more devices for which the victim interference parameter was determined to satisfy the victim condition, preferably further based on the victim interference parameter.

3. The computer-implemented method according to claim 2, wherein the allocating further comprises setting a transmit power level for at least one of the first D2D device or the second D2D device.

4. The computer-implemented method according to claim 1, further comprising, for each device of the identified devices:

assessing device transmit power used or to be used by the device,

determining an aggressor interference parameter using the determined distance parameter and the assessed device transmit power, the aggressor interference parameter being indicative of an interference level at at least one of the first D2D device or the second D2D device attributable to the device, and

determining whether the aggressor interference parameter satisfies an aggressor condition,

wherein the allocating comprises allocating one or more radio resources for the D2D communication between the first D2D device and the second D2D device based on radio resources allocated to the one or more devices for which the aggressor interference parameter was determined to satisfy the aggressor condition, preferably further based on the aggressor interference parameter.

5. The computer-implemented method according to claim 4, wherein the allocating comprises setting a transmit power level for at least one device for which the aggressor interference parameter was determined to satisfy the aggressor condition.

6. The computer-implemented method according to claim 1, further comprising:

assessing one or more of;

D2D transmit power to be used by the first D2D device for the D2D communication between the first D2D device and the second D2D device,

D2D transmit power to be used by the second D2D device for the D2D communication between the first D2D device and the second D2D device, and

transmit power used or to be used by each device of the identified devices; and

allocating the one or more radio resources for the D2D communication between the first D2D device and the second D2D device based on whether the determined distance parameter satisfies a condition based on the assessed one or more transmit powers.

7. The computer-implemented method according to claim 1, wherein the device is identified as relevant for the D2D communication between the first D2D device and the second D2D device when at least one of:

(i) the device is served by a cell that is the same as, overlapping with, neighboring to, or within a certain distance from a cell serving at least one of the first D2D device or a cell serving the second D2D device,

(ii) the device uses or is configured to use the same type of a radio resource as the one requested for the D2D communication between the first D2D device and the second D2D device,

(iii) the device uses or is configured to use frequencies within a frequency band at least partially overlapping with a frequency band requested for the D2D communication between the first D2D device and the second D2D device, or

(iv) the device uses or is configured to use radio resources within a time period at least partially overlapping with the time period for which the D2D communication between the first D2D device and the second D2D device is requested.

8. The computer-implemented method according to claim 1, wherein the location information for the device indicates a point representative of a location of the device, and wherein the distance parameter for the device is determined as:

i) a minimum or as a weighted average of;

a geometrical distance between the point representative of the location of the device and a point representative of a location of the first D2D device, and

a geometrical distance between the point representative of the location of the device and a point representative of a location of the second D2D device;

or

ii) when the device is in communication with a further node, the minimum or as a weighted average of;

a geometrical distance between the point representative of the location of the device and a point representative of a location of the first D2D device, and

a geometrical distance between the point representative of the location of the device and a point representative of a location of the second D2D device;

a geometrical distance between the point representative of the location of the further node and a point representative of a location of the first D2D device, and

a geometrical distance between the point representative of the location of the further node and a point representative of a location of the second D2D device;

or

iii) when the device is in communication with the further node, a distance between a point on a line between the device and the further node and a point on a line between the first D2D device and the second D2D device, wherein at least one of;

a location of the point on the line between the device and the further node is predefined or determined based on transmit power of at least one of the device or the further node, sensitivity of at least one of the device or the further node, or priority of the communication between the device and the further node, or

a location of the point on the line between the first D2D device and the second D2D device is predefined or determined based on transmit power of at least one of the first D2D device or the second D2D device, sensitivity of at least one of the first D2D device or the second D2D device, or priority of the D2D communication between the first D2D device and the second D2D device.

9. The computer-implemented method according to claim 1, further comprising, when the one or more radio resources allocated for the D2D communication between the first D2D device and the second D2D device overlap, in at least one of frequency or time, with radio resources used by at least one device of the identified devices, at least one of:

(i) providing an indication regarding the overlap to the at least one device, preferably with an indication of a power transmit level that the at least one device should apply;

or

(ii) providing an indication regarding the overlap to at least one of the first D2D device or the second D2D device, preferably with an indication of a power transmit level that the first D2D device should apply and an indication of a power transmit level that the second D2D device should apply.

10. A computer program product, preferably stored on a computer-readable non-transitory storage medium, comprising software code portions, which when executed in a computer, cause the computer to:

identify one or more devices relevant for a device-to-device (D2D) communication between a first D2D device and a second D2D device;

for each device of the identified devices, obtain location information for the device;

for each device of the identified devices, using the location information obtained for the device and one or both of location information for the first D2D device and location information for the second D2D device, determine a distance parameter indicative of a distance between one of the device, a device pair comprising the device and a further entity or a further device with which the device is in communication, or a group of further devices comprising the device and a plurality of further entities or further devices with which the relevant device is in communication, and one of the first D2D device, the second D2D device, or a device pair comprising the first D2D device and the second D2D device; and

allocate one or more radio resources for the D2D communication between the first D2D device and the second D2D device based on the determined distance parameter.

11. A node comprising at least a processor, including hardware, configured to:

identify one or more devices relevant for a device-to-device (D2D) communication between a first D2D device and a second D2D device;

for each device of the identified devices, obtain location information for the device;

for each device of the identified devices, using the location information obtained for the device and one or both of location information for the first D2D device and location information for the second D2D device, determine a distance parameter indicative of a distance between one of the device, a device pair comprising the device and a further entity or a further device with which the device is in communication, or a group of further devices comprising the device and a plurality of further entities or further devices with which the relevant device is in communication, and one of the first D2D device, the second D2D device, or a device pair comprising the first D2D device and the second D2D device; and

allocate one or more radio resources for the D2D communication between the first D2D device and the second D2D device based on the determined distance parameter.

12. The node according to claim 11, wherein the node is an evolved nodeB (eNB) or another node in a telecommunications network serving the first D2D device and the second D2D device, wherein the node is configured to obtain the location information of each device of the identified devices by receiving the location information as reported by the device or by determining the location information for the device.

13. The node according to claim 12, wherein, to receive the location information as reported by the device, the node is configured to at least one of:

(i) receive the location information as reported by the device to a further telecommunications network, preferably the further telecommunications network being configured to operate using radio technology different than that used for the D2D communication between the first D2D device and the second D2D device,

(ii) receive the location information as reported by the device to a further eNB within the telecommunications network, the further eNB configured to operate in a different frequency band than that used for the D2D communication between the first D2D device and the second D2D device, or

(iii) receive the location information as reported by the device located outside of the coverage of the telecommunications network or the further telecommunications network to a device located inside the coverage of the telecommunications network or the further telecommunications network.

14. The node according to claim 11, wherein the node is the first D2D device.

15. The node according to claim 14, wherein the node is further configured to transmit the location information for the node, and wherein the node is further configured to scan, in at least one of frequency or time, radio resources used by the one or more of the identified devices.