SUPPRESSION OF INTERFERENCES BETWEEN CELLS

• US 20150103689A1
• Filed: 12/19/2014
• Published: 04/16/2015
• Est. Priority Date: 12/22/2006
• Status: Abandoned Application

• Current Assignee: Lenovo Innovations Ltd Hong Kong (Lenovo Group Ltd.)
• Original Assignee: Lenovo Innovations Ltd Hong Kong (Lenovo Group Ltd.)
• Inventors: IWASAKI, Motoya
• Application Number:
  US14/577,348
• Publication Number:
  US 20150103689A1
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level

Abstract

An interference power measuring circuit in a base station measures the interference power in a cell that the base station belongs to. When the measured interference power is larger than a predetermined value, the transmitter in the base station transmits the interference information for each frequency used in the FDMA communication system to a base station in a neighboring cell. The base station in the neighboring cell instructs user equipment that communicates the base station to reduce a transmission power.

Claims

1. A base station in a FDMA communication system, comprising:

a measuring circuit that measures an interference power; and

a transmitter that transmits interference information to a neighboring base station when the measured interference power is larger than a predetermined value.

2. The base station according to claim 1, wherein the transmitter transmits the interference information for each frequency used in the FDMA communication system to the neighboring base station.

3. The base station according to claim 1, wherein the interference information includes frequency and time-slot information of the measured interference power.

4. The base station according to claim 1, wherein the neighboring base station instructs user equipment that communicates with the neighboring base station to reduce a transmission power in response to the interference information.

5. A FDMA communication system, comprising:

a base station;

a neighboring base station that is neighbor to the base station; and

user equipment that communicates with the neighboring base station,

wherein

the base station measures an interference power and transmits interference information to the neighboring base station when the measured interference power is larger than a predetermined value, and

the neighboring base station receives the interference information from the base station.

6. The FDMA communication system according to claim 5, wherein the base station transmits the interference information for each frequency used in the FDMA communication system to the neighboring base station.

7. The FDMA communication system according to claim 5, wherein the interference information includes frequency and time-slot information of the measured interference power.

8. The FDMA communication system according to claim 5, wherein the neighboring base station instructs the user equipment to reduce a transmission power in response to the interference information.

9. The FDMA communication system according to claim 7, wherein the neighboring base station instructs the user equipment to reduce a transmission power based on a result of comparison between frequency and time-slot information of a signal received by the neighboring base station from the user equipment and the frequency and time-slot information included in the interference information.

10. The FDMA communication system according to claim 9, wherein the result is a correlation between the interference power measured by the base station and the signal received by the neighboring base station from the user equipment.

11. A method for a FDMA communication system including a base station and a neighboring base station, the method comprising:

measuring an interference power by the base station; and

transmitting, by the base station, interference information to the neighboring base station when the measured interference power is larger than a predetermined value.

12. The method according to claim 11, wherein the base station transmits the interference information for each frequency used in the FDMA communication system to the neighboring base station.

13. The method according to claim 11, wherein the interference information includes frequency and time-slot information of the measured interference power.

14. The method according to claim 11, wherein the neighboring base station instructs user equipment that communicates with the neighboring base station to reduce a transmission power in response to the interference information.

15. The method according to claim 13, wherein the neighboring base station instructs user equipment that communicates with the neighboring base station to reduce a transmission power based on a result of comparison between frequency and time-slot information of a signal received by the neighboring base station from the user equipment and the frequency and time-slot information included in the interference information.

16. The method according to claim 15, wherein the result is a correlation between the interference power measured by the base station and the signal received by the neighboring base station from the user equipment.