METHOD AND DEVICE FOR SELECTING TERMINAL CAPABLE OF USING VAMOS

• US 20170374540A1
• Filed: 01/21/2016
• Published: 12/28/2017
• Est. Priority Date: 01/28/2015
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: SUK, Wonkyun
• Application Number:
  US15/545,835
• Publication Number:
  US 20170374540A1
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2089 with unbalanced quadrature channels
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 8/24 Transfer of terminal data
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Since a current GSM base station determines whether a terminal can remove interference using only a DARP information report of the terminal, the base station itself needs to determine whether the terminal is a VAMOS-executable terminal that can perform an interference removal function. The base station transmits a signal, together with a signal acting as interference, using an A-QPSK method, in order to determine whether the terminal can use a VAMOS function, and determines whether the terminal can receive an A-QPSK symbol, in consideration of a reception quality signal of a signal transmitted by the terminal.

Claims

1. ) A method of a base station for selecting a terminal capable of supporting voice services over adaptive multiuser channels on one slot (VAMOS), the method comprising:

determining whether to transmit an adaptive quadrature phase shift keying (A-QPSK) signal to a terminal;

transmitting, if a determination is made to transmit the A-QPSK signal, the A-QPSK signal in an A-QPSK symbol to the terminal;

receiving received signal quality information corresponding to the A-QPSK signal from the terminal; and

determining whether the terminal is a VAMOS-capable terminal based on the received signal quality information.

2. ) The method of claim 1, wherein transmitting the A-QPSK signal comprises modulating control information or data and an interference signal to generate the A-QPSK symbol in which the control information or data addressed to the terminal is mapped to a symbol on one of an in-phase (I) axis and quadrature-phase (Q) axis and the interference signal is mapped to a symbol on the other.

3. ) The method of claim 2, wherein transmitting the A-QPSK signal comprises adjusting a transmit power for the symbol carrying the interference signal to adjust an interference amount affecting the terminal.

4. ) The method of claim 1, wherein determining whether to transmit the A-QPSK signal comprises determining to transmit the A-QPSK signal along with system information-5 (SI-5) and system information-6 (SI-6) or discontinuous transmission silence description (DTX-SID) signaling.

5. ) The method of claim 4, wherein the received signal quality information comprises RX_REV_SUB or RX_QUAL_SUB contained in a measurement report transmitted from the terminal to the base station.

6. ) A method of a terminal for receiving an adaptive quadrature phase shift keying (A-QPSK) signal, the method comprising:

receiving an A-QPSK signal contained in an A-QPSK symbol transmitted by a base station; and

transmitting received signal quality information corresponding to the A-QPSK signal to the base station.

7. ) The method of claim 6, wherein the A-QPSK signal is transmitted along with

system information-5 (SI-5) and system information-6 (SI-6) or discontinuous transmission silence description (DTX-SID) signaling.

8. ) The method of claim 7, wherein the received signal quality information comprises RX_REV_SUB or RX_QUAL_SUB contained in a measurement report transmitted from the terminal to the base station.

9. ) A base station for selecting a terminal capable of supporting voice services over adaptive multiuser channels on one slot (VAMOS), the base station comprising:

a transceiver to transmit and receive signals; and

a controller coupled with the transceiver and configured to determine whether to transmit an adaptive quadrature phase shift keying (A-QPSK) signal to a terminal, transmit, if a determination is made to transmit the A-QPSK signal, the A-QPSK signal in an A-QPSK symbol to the terminal, receive received signal quality information corresponding to the A-QPSK signal from the terminal, and determine whether the terminal is a VAMOS-capable terminal based on the received signal quality information.

10. ) The base station of claim 9, wherein the controller controls modulating control information or data and an interference signal to generate the A-QPSK symbol in which the control information or data addressed to the terminal is mapped to a symbol on one of an in-phase (I) axis and quadrature-phase (Q) axis and the interference signal is mapped to a symbol on the other.

11. ) The base station of claim 10, wherein the controller controls a transmit power for the symbol carrying the interference signal to adjust an interference amount affecting the terminal.

12. ) The base station of claim 9, wherein the controller determines to transmit the A-QPSK signal along with system information-5 (SI-5) and system information-6 (SI-6) or discontinuous transmission silence description (DTX-SID) signaling.

13. ) The base station of claim 12, wherein the received signal quality information comprises RX_REV_SUB or RX_QUAL_SUB contained in a measurement report transmitted from the terminal to the base station.

14. ) A terminal for receiving an adaptive quadrature phase shift keying (A-QPSK) signal, the terminal comprising:

a transceiver transmit and receive signals; and

a controller coupled with the transceiver and configured to receive an A-QPSK signal contained in an A-QPSK symbol transmitted by a base station and transmit received signal quality information corresponding to the A-QPSK signal to the base station.

15. ) The terminal of claim 14, wherein the A-QPSK signal is transmitted along with system information-5 (SI-5) and system information-6 (SI-6) or discontinuous transmission silence description (DTX-SID) signaling.

16. ) The terminal of claim 15, wherein the received signal quality information comprises RX_REV_SUB or RX_QUAL_SUB contained in a measurement report transmitted from the terminal to the base station.