Radio communication method, radio communication system, radio communication base station, radio communication terminal station, and radio communication program

• US 7,782,750 B2
• Filed: 02/20/2003
• Issued: 08/24/2010
• Est. Priority Date: 02/21/2002
• Status: Active Grant

• Current Assignee: Redwood Technologies, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Yoshida, Hidemasa, Maeshima, Yasunori, Sakoda, Kazuyuki, Yamaura, Tomoya
• Primary Examiner(s): Patel; Jayanti K
• Assistant Examiner(s): PARK, JUNG H
• Application Number:
  US10/368,612
• Publication Number:
  US 20030224731A1
• Time in Patent Office: 2,742 Days
• Field of Search: 370/206, 370/208, 455/63.3, 375/343
• US Class Current: 370/206
• CPC Class Codes: H04L 25/03834 using pulse shaping
• CPC Class Codes: H04L 27/2605 Symbol extensions, e.g. Zero Tail, Unique Word [UW]
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/26134 Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain
• CPC Class Codes: H04L 27/2655 Synchronisation arrangements
• CPC Class Codes: H04L 27/2656 Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0241 where no transmission is received, e.g. out of range of the transmitter
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A radio communication method for exchanging information between a base station and a terminal station. The method includes: communicating the information between the base station and the terminal station by multi-carrier signals by OFDM modulation scheme including plural subcarriers within a bandwidth, communicating control signals in addition to the information between the base station and the terminal station, and wherein part of the control signals addressed to the terminal station from the base station is transmitted by one or more specific subcarriers in the bandwidth for the multi-carrier signals.

Claims

1. A radio communication method for exchanging information between a base station and a terminal station, the method comprising:

communicating the information between the base station and the terminal station by multi-carrier signals, by OFDM modulation scheme, including plural subcarriers within a bandwidth;

communicating control signals in addition to the information between the base station and the terminal station,

wherein part of the control signals addressed to the terminal station from the base station is transmitted by one or more specific subcarriers in the bandwidth for the multi-carrier signals,

wherein the one or more specific subcarriers is one subcarrier which occupies the band of a plurality of subcarriers which have their center at DC subcarrier in the equivalent base band.

2. The radio communication method as defined in claim 1, wherein the one or more specific subcarriers are an odd number of subcarriers which have their center at DC subcarrier in the equivalent base band.

3. The radio communication method as defined in claim 2, wherein the one or more specific subcarriers is one DC subcarrier in the equivalent base band.

4. The radio communication method as defined in claim 1, wherein the base station transmits part of the control signals addressed to the terminal station, which is transmitted by the one or more specific subcarriers, in synchronism with the frame position for information transmission.

5. The radio communication method as defined in claim 1, wherein the base station transmits part of the control signals addressed to the terminal station, which is transmitted by the specific subcarrier, in a code format.

6. A radio communication method for exchanging information between a base station and a terminal station, the method comprising:

communicating the information between the base station and the terminal station with a frame period by multi-carrier signals, by OFDM modulation scheme, including plural subcarriers within a bandwidth;

communicating control signals in addition to the information between the base station and the terminal station,

wherein part of the control signals addressed to the terminal station from the base station is transmitted by one or more specific subcarriers in the bandwidth for the multi-carrier signals,

wherein the one or more specific subcarriers is one subcarrier which occupies the band of a plurality of subcarriers which have their center at DC subcarrier in the equivalent base band.

7. The radio communication method as defined in claim 6, wherein the base station transmits the part of the control signals addressed to the terminal station, which is transmitted by the specific position, in a code format.

8. A non-transitory computer readable storage medium storing computer executable instructions to be applied to a radio communication system for exchanging information between a base station and a terminal station, comprising:

computer executable instruction causing communicating the information between the base station and the terminal station by multi-carrier signals by OFDM modulation scheme including plural subcarriers within a bandwidth, and communicating control signals in addition to the information between the base station and the terminal station,

wherein in the base station, information to be transmitted is modulated by the OFDM modulation scheme, so that multi-carrier signals addressed to the terminal station are generated, part of the control signals addressed to the terminal station is modulated by one or more specific subcarriers in the band of the multi-carrier signal, and the modulated signals are transmitted,

wherein the one or more specific subcarriers is one subcarrier which occupies the band of a plurality of subcarriers which have their center at DC subcarrier in the equivalent base band.

9. A radio communication method for exchanging information between a base station and a terminal station, the method comprising:

communicating the information between the base station and the terminal station by multi-carrier signals, by OFDM modulation scheme, including plural subcarriers within a bandwidth;

communicating control signals in addition to the information between the base station and the terminal station,

wherein part of the control signals addressed to the terminal station from the base station is transmitted by one or more specific subcarriers in the bandwidth for the multi-carrier signals,

wherein the information to be transmitted from the base station by the specific subcarrier requires the same data to be transmitted repeatedly an even number of times, with more than half the repeated transmissions being composed of said data whose polarity of sign is inverted.

10. The radio communication method as defined in claim 9, wherein the one or more specific subcarriers are an odd number of subcarriers which have their center at DC subcarrier in the equivalent base band.

11. The radio communication method as defined in claim 9, wherein the one or more specific subcarriers is one DC subcarrier in the equivalent base band.

12. The radio communication method as defined in claim 9, wherein the one or more specific subcarriers is one subcarrier which occupies the band of a plurality of subcarriers which have their center at DC subcarrier in the equivalent base band.

13. The radio communication method as defined in claim 9, wherein the base station transmits part of the control signals addressed to the terminal station, which is transmitted by the one or more specific subcarriers, in synchronism with the frame position for information transmission.

14. The radio communication method as defined in claim 9, wherein the base station transmits part of the control signals addressed to the terminal station, which is transmitted by the specific subcarrier, in a code format.

16. The radio communication method as defined in claim 14, wherein the base station transmits the part of the control signals addressed to the terminal station, which is transmitted by the specific position, in a code format.

15. A radio communication method for exchanging information between a base station and a terminal station, the method comprising:

communicating the information between the base station and the terminal station with a frame period by multi-carrier signals, by OFDM modulation scheme, including plural subcarriers within a bandwidth;

communicating control signals in addition to the information between the base station and the terminal station,

wherein part of the control signals addressed to the terminal station from the base station is transmitted by one or more specific subcarriers in the bandwidth for the multi-carrier signals,

wherein the information to be transmitted from the base station by the specific subcarrier requires the same data to be transmitted repeatedly an even number of times, with more than half the repeated transmissions being composed of said data whose polarity of sign is inverted.

17. A non-transitory computer readable storage medium storing computer executable instructions to be applied to a radio communication system for exchanging information between a base station and a terminal station, comprising:

computer executable instruction causing communicating the information between the base station and the terminal station by multi-carrier signals by OFDM modulation scheme including plural subcarriers within a bandwidth, and communicating control signals in addition to the information between the base station and the terminal station,

wherein in the base station, information to be transmitted is modulated by the OFDM modulation scheme, so that multi-carrier signals addressed to the terminal station are generated, part of the control signals addressed to the terminal station is modulated by one or more specific subcarriers in the band of the multi-carrier signal, and the modulated signals are transmitted,

wherein the information to be transmitted from the base station by the specific subcarrier requires the same data to be transmitted repeatedly an even number of times, with more than half the repeated transmissions being composed of said data whose polarity of sign is inverted.