RADIO RESOURCE CONTROL FOR DUAL-ACCESS-TECHNOLOGY CELLS

• US 20140307552A1
• Filed: 04/13/2013
• Published: 10/16/2014
• Est. Priority Date: 04/13/2013
• Status: Active Grant

• Current Assignee: Fujitsu Connected Technologies Limited
• Original Assignee: Fujitsu Limited
• Inventors: CHEN, Wei-Peng, ELSHERIF, Ahmed Ragab
• Granted Patent: US 9,107,126 B2
• Time in Patent Office: Days
• US Class Current: 370/235
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/24 Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
• CPC Class Codes: H04W 36/1446 wherein at least one of the networks is unlicensed
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

According to an aspect of an embodiment, a base station includes a first interface, a second interface, a third interface, and an allocator. The first interface communicates with a plurality of terminals via a licensed radio spectrum. The second interface communicates with the plurality of terminals via an unlicensed radio spectrum. The third interface receives from a central controller a licensed radio spectrum assignment including a set of assigned physical resource blocks associated with the licensed radio spectrum. The allocator allocates unlicensed radio spectrum resources and the physical resource blocks among the plurality of terminals.

Claims

1. A base station comprising:

a first interface configured to communicate with a plurality of terminals via a licensed radio spectrum;

a second interface configured to communicate with the plurality of terminals via an unlicensed radio spectrum;

a third interface configured to receive from a central controller a licensed radio spectrum assignment including a set of assigned physical resource blocks associated with the licensed radio spectrum; and

an allocator configured to allocate unlicensed radio spectrum resources and the physical resource blocks among the plurality of terminals.

2. The base station of claim 1, further comprising an estimator configured to estimate radio resources desired by the plurality of terminals for both the licensed radio spectrum and the unlicensed radio spectrum,

wherein the third interface is further configured to transmit to the central controller the estimated radio resources desired by the plurality of terminals for the licensed radio spectrum.

3. The base station of claim 2, wherein the estimator is configured to estimate the radio resources desired by the plurality of terminals for both the licensed radio spectrum and the unlicensed radio spectrum at least in part by decoupling an estimation of unlicensed radio spectrum rates from licensed radio spectrum rates.

4. The base station of claim 2, wherein the estimator is configured to estimate the radio resources desired by the plurality of terminals for both the licensed radio spectrum and the unlicensed radio spectrum at least in part by determining a minimum number of physical resource blocks that satisfy rate requirements of the plurality of terminals.

5. The base station of claim 1, wherein the allocator is configured to allocate the unlicensed radio spectrum resources and the physical resource blocks at least in part by maximizing a worst ratio of an achieved rate to a requested rate for all terminals of the plurality of terminals.

6. The base station of claim 5, wherein the allocator is further configured to allocate the unlicensed radio spectrum resources and the physical resource blocks with Quality of Service (QoS) guarantees based on the traffic type for each connection for all terminals.

7. The base station of claim 1, further comprising a distributor configured to distribute packets to be communicated to a terminal of the plurality of terminals, the distributor further configured to distribute the packets between the licensed radio spectrum and the unlicensed radio spectrum, wherein the packets to be communicated via the unlicensed radio spectrum are distributed to an unlicensed spectrum scheduler and packets to be communicated via the licensed radio spectrum are distributed to a licensed spectrum scheduler.

8. A non-transitory computer-readable medium having computer instructions stored thereon that are executable by a processing device to perform operations for controlling radio resources in a telecommunication system, the operations comprising:

communicating with a plurality of terminals via a licensed radio spectrum;

communicating with the plurality of terminals via an unlicensed radio spectrum;

receiving from a central controller a licensed radio spectrum assignment including a set of assigned physical resource blocks associated with the licensed radio spectrum; and

allocating unlicensed radio spectrum resources and the physical resource blocks among the plurality of terminals.

9. The non-transitory computer-readable medium of claim 8, wherein the operations further comprise:

estimating radio resources desired by the plurality of terminals for both the licensed radio spectrum and the unlicensed radio spectrum; and

transmitting to the central controller the estimated radio resources desired by the plurality of terminals for the licensed radio spectrum.

10. The non-transitory computer-readable medium of claim 9, wherein the radio resources desired by the plurality of terminals for both the licensed radio spectrum and the unlicensed radio spectrum are estimated at least in part by decoupling an estimation of unlicensed radio spectrum rates from licensed radio spectrum rates.

11. The non-transitory computer-readable medium of claim 9, wherein the radio resources desired by the plurality of terminals for both the licensed radio spectrum and the unlicensed radio spectrum are estimated at least in part by determining a minimum number of physical resource blocks that satisfy rate requirements of the plurality of terminals.

12. The non-transitory computer-readable medium of claim 8, wherein the unlicensed radio spectrum resources and the physical resource blocks are allocated at least in part by maximizing a worst ratio of an achieved rate to a requested rate for all terminals of the plurality of terminals.

13. The non-transitory computer-readable medium of claim 12, wherein the unlicensed radio spectrum resources and the physical resource blocks are allocated with Quality of Service (QoS) guarantees based on the traffic type for each connection for all terminals.

14. The non-transitory computer-readable medium of claim 8, wherein the operations further comprise distributing packets to be communicated to a terminal of the plurality of terminals between the licensed radio spectrum and the unlicensed radio spectrum, and wherein the packets to be communicated via the unlicensed radio spectrum are distributed to an unlicensed spectrum scheduler and the packets to be communicated via the licensed radio spectrum are distributed to a licensed spectrum scheduler.

15. A method of controlling radio resources, the method comprising:

communicating with a plurality of terminals via a licensed radio spectrum;

communicating with the plurality of terminals via an unlicensed radio spectrum;

receiving from a central controller a licensed radio spectrum assignment including a set of assigned physical resource blocks associated with the licensed radio spectrum; and

allocating unlicensed radio spectrum resources and the physical resource blocks among the plurality of terminals.

16. The method of claim 15, further comprising:

estimating radio resources desired by the plurality of terminals for both the licensed radio spectrum and the unlicensed radio spectrum; and

transmitting to the central controller the estimated radio resources desired by the plurality of terminals for the licensed radio spectrum.

17. The method of claim 16, wherein the radio resources desired by the plurality of terminals for both the licensed radio spectrum and the unlicensed radio spectrum are estimated at least in part by decoupling an estimation of unlicensed radio spectrum rates from licensed radio spectrum rates.

18. The method of claim 16, wherein the radio resources desired by the plurality of terminals for both the licensed radio spectrum and the unlicensed radio spectrum are estimated at least in part by determining a minimum number of physical resource blocks that satisfy rate requirements of the plurality of terminals.

19. The method of claim 15, wherein the unlicensed radio spectrum resources and the physical resource blocks are allocated at least in part by maximizing a worst ratio of an achieved rate to a requested rate for all terminals of the plurality of terminals, and wherein the unlicensed radio spectrum resources and the physical resource blocks are allocated with Quality of Service (QoS) guarantees based on the traffic type for each connection for all terminals.

20. The method of claim 15, further comprising distributing packets to be communicated to a terminal of the plurality of terminals between the licensed radio spectrum and the unlicensed radio spectrum, wherein the packets to be communicated via the unlicensed radio spectrum are distributed to an unlicensed spectrum scheduler and the packets to be communicated via the licensed radio spectrum are distributed to a licensed spectrum scheduler.