Variable bandwidth in a communication system

• US 20050170839A1
• Filed: 02/04/2004
• Published: 08/04/2005
• Est. Priority Date: 02/04/2004
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Rinne, Mikko, Kaunisto, Risto, Lappetelainen, Antti, Parssinen, Aarno, Ojala, Jussi, Seppinen, Pauli
• Granted Patent: US 7,433,708 B2
• Time in Patent Office: Days
• US Class Current: 455/446
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/06 Hybrid resource partitioning, e.g. channel borrowing
• CPC Class Codes: H04W 16/12 Fixed resource partitioning

Abstract

A method, device, and system that use narrowband channels to provide higher re-use without multiplying the operator spectrum requirement. If a communication system supports variable carrier bandwidth channels, the narrow channel capacity can be divided among adjacent cells to provide higher re-use.

Claims

1. A method for decreasing required radio spectrum in a communication system using variable bandwidth, the method comprising:

dividing radio frequencies of the communication system into a wideband channel radio frequency and narrowband channel radio frequencies; and

communicating user data using both the wideband channel radio frequency and the narrowband channel radio frequencies.

2. The method of claim 1, wherein a higher frequency re-use factor is applied to said narrowband channel radio frequencies.

3. The method of claim 1, wherein at least in some cells of the communication system both the narrowband channel radio frequencies and the wideband channel radio frequency are allocated so that the narrowband channel radio frequencies are used to extend cell range.

4. The method of claim 1, wherein the narrowband channel radio frequencies are divided among adjacent communication cells in such a way that adjacent cells are using different narrowband channel radio frequencies.

5. The method of claim 1, wherein the narrowband channel radio frequencies are located outside the wideband channel.

6. The method of claim 5, wherein the narrowband channel multiple access method incorporates spreading as a means to implement spectrum sharing between adjacent cells.

7. The method of claim 1, wherein the narrowband channel radio frequencies are located inside the wideband channel radio frequency.

8. The method of claim 1, wherein at least one of the communication cells includes a repeater configured to operate using both wideband channel radio frequencies and narrowband channel radio frequencies.

9. The method of claim 1, further comprising transmission of communication scheduling information using a narrowband channel radio frequency.

10. The method of claim 9, wherein scheduling information includes terminal identity for a terminal that will use a channel.

11. The method of claim 1, wherein use of the wideband channel radio frequency is coordinated.

12. The method of claim 1, wherein the narrowband channel radio frequencies are assigned to different communication cells.

13. A wireless communication system using variable bandwidth to increase re-use of frequency channels in the wireless communication system, the system comprising:

a mobile station having a receiver and a transmitter, the receiver and transmitter being configured to adaptively sample frequency and bandwidth; and

a base station having a receiver and a transmitter, the receiver and transmitter being configured to adaptively sample frequency and bandwidth.

14. The system of claim 13, wherein communication between said mobile station and said base station can take place utilizing at least two different frequency carrier bandwidths;

narrowband and wideband.

15. The system of claim 14, wherein narrowband carriers are used in communication between the mobile station and base station to enable higher re-use of frequency channels without multiplying operator spectrum requirements.

16. The system of claim 14, wherein the narrowband carriers are outside a full bandwidth channel.

17. The system of claim 16, wherein the narrowband carrier or narrowband carriers outside the full bandwidth channel implement spreading.

18. The system of claim 14, wherein the narrowband carriers are inside a full bandwidth channel.

19. The system of claim 14, wherein the mobile station utilizes multiple antennas.

20. A device operable in a wireless communication environment and configured to utilize variable bandwidth, the device comprising:

a radio interface configured to communicate with base stations in a wireless communication environment; and

a processor coupled to the radio interface, the processor providing commands to modulate at least two transmission and receive bandwidths;

wideband and narrowband.

21. The device of claim 20, wherein the narrowband carriers are inside a full bandwidth channel.

22. The device of claim 20, wherein the narrowband carriers are outside a full bandwidth channel.

23. The device of claim 22, wherein the narrowband carrier or narrowband carriers outside the full bandwidth channel implement spreading.

24. The device of claim 20, further comprising multiple antennas.