Method of analyzing interference between data communication terminals

• US 8,848,598 B2
• Filed: 12/22/2011
• Issued: 09/30/2014
• Est. Priority Date: 12/23/2010
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Son, Ho Kyung
• Primary Examiner(s): Hamza, Faruk
• Assistant Examiner(s): GUADALUPE CRUZ, AIXA AMYR
• Application Number:
  US13/334,133
• Publication Number:
  US 20120163195A1
• Time in Patent Office: 1,013 Days
• Field of Search: None
• US Class Current: 370/317
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]
• CPC Class Codes: H04B 17/336 Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method may include distributing a interfered terminal; calculating an initial signal-to-interference power ratio and a data throughput of the interfered terminal; distributing interfering terminals and an interfering link base station; calculating a final transmitting power of the interfering terminal through power control between the interfering terminal and the interfering link base station; calculating a path loss and a collision factor between the interfered terminal and the interfering terminal; and calculating a final signal-to-interference power ratio and a data throughput of the interfered terminal. Accordingly, it is possible to analyze interference in consideration of a terminal use pattern in view of presence of hot spots, and to provide basic data for setting an effective emission transmitting power level of the terminal and a protection band between the terminals since the signal-to-interference power ratio and the data throughput can be calculated through interference analysis.

Claims

1. A method of analyzing interference between data communication terminals, the method comprising:

distributing an interfered terminal suffering from interference;

calculating an initial signal-to-interference power ratio and a data throughput of the interfered terminal;

distributing interfering terminals and an interfering link base station;

calculating a final transmitting power of the interfering terminal through power control between the interfering terminal and the interfering link base station;

calculating a path loss and a collision factor between the interfered terminal and the interfering terminal; and

calculating a final signal-to-interference power ratio and a data throughput of the interfered terminal;

wherein the distributing of the interfered terminal suffering from interference comprises randomly distributing the interfered terminal suffering from interference around a hotspot region that is disposed within a radius of a cell of an interfered link base station, the hotspot region having an area that is smaller than the area of the cell.

2. The method of claim 1, wherein the distributing of the interfering terminals and the interfering link base station comprises randomly distributing a predetermined number of interfering terminals around the interfered terminal within a radius of a hot-spot cell, and distributing the interfering link base station according to a condition of an input parameter.

3. The method of claim 1, wherein the calculating of the path loss and the collision factor between the interfered terminal and the interfering terminal comprises calculating the collision factor using the following equation:

4. The method of claim 1, wherein the calculating of the final signal-to-interference power ratio and the data throughput of the interfered terminal comprises calculating the signal-to-interference power ratio using the following equation:

5. The method of claim 4, wherein the interference signal sizes I_inter and I_other are calculated using a value obtained by subtracting the collision factor from a path loss difference between the terminals.

6. The method of claim 4, wherein I_other is calculated using the following equation:

I_other=P_tx(f_interfer,f_vr)−

PL<sub>t—

t</sub>−

G_collision

where P_tx(f_interfer, f_vr) denotes a size of a signal actually transmitted in a receiving bandwidth of the interfered terminal in a mask of a transmitting signal that the interfering terminal transmits after performing power control, PL<sub>t—

t</sub> denotes the path loss value calculated in a unit configured to calculate a path loss between the interfered terminal and the interfering terminal, and G_collision denotes the collision factor between the interfered terminal and the interfering terminal calculated in a unit configured to calculate a collision factor between the interfered terminal and the interfering terminal.