RADIO SIGNAL TRANSMISSION METHOD, RADIO SIGNAL TRANSMITTING DEVICE, RADIO SIGNAL RECEIVING DEVICE, RADIO BASE STATION DEVICE AND RADIO TERMINAL DEVICE

• US 20140204900A1
• Filed: 03/25/2014
• Published: 07/24/2014
• Est. Priority Date: 09/28/2011
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: KAWASAKI, Yoshihiro
• Granted Patent: US 9,380,579 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/26025 Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking allocating sub-channels of the transmission path H04L5/003
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames

Abstract

When a plurality of radio signals having different sub frame lengths are transmitted on the same radio carrier, a radio signal of a short sub frame length is arranged inside a carrier band, and a radio signal of a sub frame length longer than the sub frame length of the short sub frame length signal is arranged outside the carrier band.

Claims

1. A radio signal transmission method, comprising:

when a plurality of radio signals having different sub frame lengths are transmitted on the same radio carrier,

arranging a radio signal of a short sub frame length (hereinafter, referred to as a “

short sub frame length signal”

) inside a carrier band; and

arranging a radio signal of a sub frame length (hereinafter, referred to as a “

long sub frame length signal”

) longer than the sub frame length of the short sub frame length signal outside the carrier band.

2. The radio signal transmission method according to claim 1,

wherein control information related to the short sub frame length signal is arranged throughout a transmission band of the short sub frame length signal, and

control information related to the long sub frame length signal is arranged throughout the entire carrier band.

3. The radio signal transmission method according to claim 2,

wherein a synchronous signal related to the short sub frame length signal and the long sub frame length signal is arranged in a central portion of the carrier band.

4. The radio signal transmission method according to claim 2,

wherein an area through which the short sub frame length signal is transmitted differs from an area through which the long sub frame length signal is transmitted in at least one of an arrangement pattern, an arrangement density, and a code sequence of a reference signal used by a radio terminal device for demodulation of a data signal or a control signal or quality evaluation of a radio section between a radio base station device and each radio terminal device.

5. The radio signal transmission method according to claim 1,

wherein information related to a frequency width of a transmission area of the short sub frame length signal is transmitted to a terminal capable of receiving only the short sub frame length signal as the control information related to the short sub frame length signal, and

information related to a frequency width of a transmission area of the short sub frame length signal and information related to the carrier band are transmitted to a terminal capable of receiving both the short sub frame length signal and the long sub frame length signal as the control information related to the long sub frame length signal.

6. A radio signal transmission method, comprising:

when an existing radio signal having a certain sub frame length and a new radio signal having a sub frame length different from the sub frame length of the existing radio signal are transmitted together on the same radio carrier,

arranging the existing radio signal inside a carrier band; and

arranging the new radio signal outside the carrier band.

7. The radio signal transmission method according to claim 6,

wherein the sub frame length of the existing radio signal is set to be shorter than the sub frame length of the new radio signal,

control information related to the existing radio signal is arranged throughout a transmission band of the existing radio signal, and

control information related to the new radio signal is arranged throughout the entire carrier band.

8. The radio signal transmission method according to claim 6,

wherein the sub frame length of the existing radio signal is set to be longer than the sub frame length of the new radio signal,

control information related to the existing radio signal is arranged throughout a transmission band of the existing radio signal, and

control information related to the new radio signal is arranged throughout a transmission band of the new radio signal.

9. A radio signal transmitting device that transmits a plurality of radio signals having different sub frame lengths on the same radio carrier, the radio signal transmitting device comprising:

a short sub frame length signal generator that generates a radio signal of a short sub frame length (hereinafter, referred to as a “

short sub frame length signal”

);

a long sub frame length signal generator that generates a radio signal of a sub frame length (hereinafter, referred to as a “

long sub frame length signal”

) longer than the sub frame length of the short sub frame length signal; and

a signal multiplexer that performs time multiplexing and frequency multiplexing on the short sub frame length signal and the long sub frame length signal such that the short sub frame length signal generated by the short sub frame length signal generator is arranged inside a carrier band, and the long sub frame length signal generated by the long sub frame length signal generator is arranged outside the carrier band.

10. The radio signal transmitting device according to claim 9,

wherein the signal multiplexer arranges control information related to the short sub frame length signal throughout a transmission band of the short sub frame length signal, and arranges control information related to the long sub frame length signal throughout the entire carrier band.

11. The radio signal transmitting device according to claim 10,

wherein the signal multiplexer arranges a synchronous signal related to the short sub frame length signal and the long sub frame length signal in a central portion of the carrier band.

16. A radio signal receiving device that receives either of the short sub frame length signal and the long sub frame length signal from the radio signal transmitting device according to claim 9, the radio signal receiving device comprising:

a signal demultiplexer that performs time demultiplexing and frequency demultiplexing on the short sub frame length signal and the long sub frame length signal;

a control information extractor that extracts the control information related to the short sub frame length signal and the control information related to the long sub frame length signal from a signal demultiplexed by the signal demultiplexer; and

a signal extractor that extracts the short sub frame length signal and the long sub frame length signal based on the control information extracted by the control information extractor.

12. A radio signal transmitting device that transmits an existing radio signal having a certain sub frame length and a new radio signal having a sub frame length different from the sub frame length of the existing radio signal together on the same radio carrier, the radio signal transmitting device comprising:

an existing radio signal generator that generates the existing radio signal;

a new radio signal generator that generates the new radio signal; and

a signal multiplexer that performs time multiplexing and frequency multiplexing on the existing radio signal and the new radio signal such that the existing radio signal generated by the existing radio signal generator is arranged inside a carrier band, and the new radio signal generated by the new radio signal generator is arranged outside the carrier band.

13. The radio signal transmitting device according to claim 12,

wherein the sub frame length of the existing radio signal is set to be shorter than the sub frame length of the new radio signal, and

the signal multiplexer arranges control information related to the existing radio signal throughout a transmission band of the existing radio signal, and arranges control information related to the new radio signal throughout the entire carrier band.

14. The radio signal transmitting device according to claim 12,

wherein the sub frame length of the existing radio signal is set to be longer than the sub frame length of the new radio signal, and

the signal multiplexer arranges control information related to the existing radio signal throughout a transmission band of the existing radio signal, and arranges control information related to the new radio signal throughout a transmission band of the new radio signal.

15. The radio signal transmitting device according to claim 13,

wherein the signal multiplexer arranges a synchronous signal related to the existing radio signal and the new radio signal in a central portion of the carrier band.

17. A radio signal receiving device that receives either of the existing radio signal and the new radio signal from the radio signal transmitting device according to claim 12, the radio signal receiving device comprising:

a signal demultiplexer that performs time demultiplexing and frequency demultiplexing on the existing radio signal and the new radio signal;

a control information extractor extracts the control information related to the existing radio signal and the control information related to the new radio signal from a signal demultiplexed by the signal demultiplexer; and

a signal extractor that extracts the existing radio signal and the new radio signal based on the control information extracted by the control information extractor.