Data transmission method, system and network element

• US 20040228388A1
• Filed: 06/20/2003
• Published: 11/18/2004
• Est. Priority Date: 04/25/2003
• Status: Active Grant

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Salmenkaita, Matti
• Granted Patent: US 7,388,897 B2
• Time in Patent Office: Days
• US Class Current: 375/132
• CPC Class Codes: H04B 1/715 Interference-related aspects
• CPC Class Codes: H04B 2001/7154 with means for preventing interference
• CPC Class Codes: H04W 16/12 Fixed resource partitioning

Abstract

A data transmission method in a telecommunication system utilizing frequency hopping and the system having a limit for allowable interference. The method includes performing at least two frequency hopping layers, each layer comprising one or more frequency hopping areas, the frequency hopping layers having frequency hopping parameters divergent from each other, setting the frequency hopping layers one on the other in such a way that the overlapping of the border zones of the frequency hopping areas is minimized, estimating interference in the system or in a predetermined part of the system, and if the interference is too high, transferring one or more users to another frequency hopping layer.

Claims

1. A method of data transmission in a telecommunication system utilizing frequency hopping and the system having a limit for allowable interference, the method comprising:

performing at least two frequency hopping layers, each layer comprising one or more frequency hopping areas, the frequency hopping layers having frequency hopping parameters divergent from each other;

setting the frequency hopping layers one on the other in such a way that overlapping of border zones of the frequency hopping areas is minimized;

estimating interference in the system or in a predetermined part of the system;

if the interference is too high,

transferring one or more users to another frequency hopping layer.

2. The method of claim 1, wherein the frequency hopping areas are at least essentially of a same size as radio cells of the telecommunication system.

3. The method of claim 1, wherein the frequency hopping areas are of the same size as a cell cluster comprising a predetermined number of radio cells of the telecommunication system.

4. The method of claim 1, wherein the telecommunication system is synchronized allowing synchronous utilization of frequency hopping sequences.

5. The method of claim 1, wherein the frequency hopping parameters of the frequency hopping layers differ from each other in such a way that layers do not interfere with each other.

6. The method of claim 1, wherein the interference estimating comprises carrier-to-interference (CIR) measuring.

7. The method of claim 1, wherein the frequency hopping layers have different frequency reuse factors.

8. The method of claim 1, wherein a used frequency hopping band is divided into the frequency hopping layers.

9. A network element utilizing frequency hopping, the network element comprising:

means for performing at least two frequency hopping layers, each layer comprising one or more frequency hopping areas, the frequency hopping layers having frequency hopping parameters divergent from each other;

means for setting the frequency hopping layers in such a way that overlapping of border zones of the frequency hopping areas is minimized,

means for processing interference information of a telecommunications system or of a predetermined part of the system,

means for transferring one or more users to another frequency hopping layer.

10. The network element of claim 9, wherein the frequency hopping areas are at least essentially of a same size as radio cells of the telecommunication system.

11. The network element of claim 9, wherein the frequency hopping areas are of substantially a same size as a cell cluster comprising a predetermined number of radio cells of the telecommunication system.

12. The network element of claim 9, wherein the network element is synchronized with the telecommunications system allowing synchronous utilization of frequency hopping sequences.

13. The network element of claim 9, wherein the frequency hopping parameters of the layers differ from each other in order to prevent the layers from interfering with each other.

14. The network element of claim 9, wherein the interference information comprise results of carrier-to-interference (CIR) measuring.

15. The network element of claim 9, wherein the frequency hopping layers have different frequency reuse factors.

16. The network element of claim 9, further comprising means for dividing a used frequency hopping band with the frequency hopping layers.

17. A network element utilizing frequency hopping, the network element being configured to:

perform at least two frequency hopping layers, each layer comprising one or more frequency hopping areas, the frequency hopping layers having frequency hopping parameters divergent from each other;

set the frequency hopping layers in such a way that overlapping of border zones of the frequency hopping areas is minimized;

process interference information of a telecommunications system or of a predetermined part of the system; and

transfer one or more users to another frequency hopping layer.

18. A data transmission system using frequency hopping and having a limit for allowable interference, the data transmission system comprising:

means for performing at least two frequency hopping layers, each layer comprising one or more frequency hopping areas, the frequency hopping layers having frequency hopping parameters divergent from each other;

means for setting the frequency hopping layers one on the other in such a way that overlapping of border zones of the frequency hopping areas is minimized;

means for measuring interference in the system or in a predetermined part of the system and for comparing the interference to the limit; and

means for transferring one or more users to another frequency hopping layer.