Radio resource management in a communication system

• US 20030171123A1
• Filed: 01/17/2003
• Published: 09/11/2003
• Est. Priority Date: 02/14/2000
• Status: Active Grant

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Holma, Harri, Raitola, Mika, Laakso, Janne, Heiska, Kari
• Granted Patent: US 7,395,069 B2
• Time in Patent Office: Days
• US Class Current: 455/453
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading

Abstract

The present invention relates to a radio communication system and a method in the system. According to the method radio resources of the system are managed based on information of the bitrate that has been allocated for a station of the radio communication system.

Claims

1. A method in a radio communication system, comprising

allocating a bitrate for a station of the radio communication system;

and

managing radio resources of the system based on information of the allocated bitrate, wherein the information comprises a load factor that is determined based on the allocated bitrate and signal energy to noise ratio, and which load factor is independent of the power of the uplink signal.

2. A method as claimed in claim 1, wherein the load factor is defined by taking an inverse of equation:

1+[(chiprate×

noise)/(signal energy×

bitrate)].

3. A method as claimed in claims 1 or 2, wherein the load factor is measured by a base station of the radio communication system.

4. A method as claimed in any of claims 1 to 3, wherein a load factor is determined for all stations within a cell of the radio communication system.

5. A method as claimed in claim 4, wherein the load factors of all stations in the cell are summed together to receive a total load factor of the cell.

6. A method as claimed in claim 5, wherein a target load is set for the total load factor

7. A method as claimed in any of preceding claims, comprising step of identifying a station that causes interference to the radio communication system.

8. A method as claimed in claim 7, wherein the interference consists of adjacent channel interference.

9. A method as claimed in claim 7 or 8, wherein the power of the interfering station is adjusted.

10. A method as claimed in claim 9, wherein uplink power of the interfering station is adjusted.

11. A method as claimed in any of claims 7 to 10, wherein powers of the stations that suffer from the interference by the interfering station are adjusted.

12. A method as claimed in any preceding claim;

wherein the management of radio resources is based also on a total power value that is derived from noise raise information.

13. A method as claimed in any of claims 1 to 11 when appended to claim 12, wherein a power target value is set for the total power value.

14. A method as claimed in any of claims 1 to 13, wherein the determination of the load factor is accomplished at a base station.

15. A method as claimed in any of claims 1 to 13, wherein the determination of the load factor is accomplished at a radio network controller.

16. A method as claimed in any of the preceding claims, wherein the management of the radio resources is adapted in cell-by-cell basis.

17. A method as claimed in any of the claims 1 to 16, wherein the load factor is also based on information of interference caused by other cells.

18. A method as claimed in any of the claims 1 to 17, wherein the management of the radio resources is accomplished at a radio network controller and the load factor is signalled from a base station to the radio network controller with predefined intervals.

19. A radio communication system, comprising

means for allocating bitrates for stations of the radio communication system;

and

means for managing radio resources of the system based on information of the allocated bitrates, wherein the information comprises a load factor that is determined based on the allocated bitrates and signal to noise ratio, and which load factor is independent of the power of the uplink signal.

20. A radio communication system as claimed in claim 19, wherein a radio resource management unit is arranged both to allocate the bitrates and to manage the radio resources.