Signal transmission method and system for transmitting signal by using interference control method and/or transmission power control method

• US 8,892,045 B2
• Filed: 08/26/2009
• Issued: 11/18/2014
• Est. Priority Date: 03/03/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwon, Tae Soo, Jang, Kyung Hun, Kim, Young-Doo
• Primary Examiner(s): Bilodeau, David
• Application Number:
  US12/547,535
• Publication Number:
  US 20100227637A1
• Time in Patent Office: 1,910 Days
• Field of Search: 455/63.1
• US Class Current: 455/63.1
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04B 7/0697 using spatial multiplexing
• CPC Class Codes: H04J 11/0026 of multi-user interference
• CPC Class Codes: H04L 2025/03802 Signalling on the reverse channel
• CPC Class Codes: H04L 25/0228 with direct estimation from sounding signals
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 52/143 Downlink 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 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Provided are a signal transmission method and a network apparatus to control interference in a radio communication network. A terminal may transmit to the network apparatus, signal quality information associated with a radio channel formed between the terminal and a corresponding base station. The corresponding base station may output a signal received by the plurality of terminals, based on the signal quality information.

Claims

1. A terminal comprising:

a receiver configured to receive a main signal transmitted from a corresponding base station, and receive interference signals transmitted from interference base stations, the interference signals being processed based on an interference control scheme; and

a signal quality information generation unit configured to generate signal quality information to be transmitted to the corresponding base station and the interference base station,

the signal quality information enabling the interference base stations to control phases of the transmitted interference signals to have a same phase when received by the receiver.

2. The terminal of claim 1, wherein the interference control scheme is one of an interference alignment scheme, an interference neutralization scheme, an interference cancellation scheme, and an interference treated as noise scheme.

6. The terminal of claim 1, wherein each of the interference base station determines whether the signal quality information is greater than or equal to a predetermined value, and controls the phases of the interference signals to have the same phase when received by the receiver in response to the signals quality information being determined to be greater than or equal to the predetermined value, the signal quality information being selected from a group consisting of a signal-to-noise power ratio of a radio channel formed between a corresponding base station and the terminal, an interference-to-noise power ratio of the radio channel, a gain of the radio channel, a gain of an interference channel formed between the corresponding base station and the terminal, and a noise power of the terminal.

3. A method of receiving a radio signal, the method comprising:

receiving a main signal transmitted from a corresponding base station and interference signals transmitted from interference base stations, the main signal and the interference signals being processed based on an interference control scheme; and

generating signal quality information to be transmitted to the corresponding base station and the interference base stations,

the signal quality information enabling the interference base stations to control phases of the transmitted interference signals to have a same phase when received.

4. The method of claim 3, wherein the interference control scheme is one of an interference alignment scheme, an interference neutralization scheme, an interference cancellation scheme, and an interference treated as noise scheme.

5. A non-transitory computer-readable storage medium storing a program to receiving a radio signal, the program comprising instructions that when executed cause a computer to:

receive a main signal transmitted from a corresponding base station and interference signals transmitted from interference base stations, the interference signals being processed based on an interference control scheme; and

generate signal quality information to be transmitted to the corresponding base station and the interference base stations,

the signal quality information enabling the interference base stations to control phases of the transmitted interference signals to have a same phase when received.