Transmission method, transmitter and receiver

• US 20020118659A1
• Filed: 04/01/2002
• Published: 08/29/2002
• Est. Priority Date: 02/26/1998
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sakoda, Kazuyuki, Suzuki, Mitsuhiro
• Granted Patent: US 7,110,472 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 7/264 for data rate control
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/026 using code division
• CPC Class Codes: H04W 52/267 taking into account the information rate

Abstract

In a transmission method, a receiver and a transmitter, communication is performed without affecting other types of communication even under a communication environment for using the same frequency band for adjacent cells. When generating a transmission symbol stream by applying predetermined modulation processing to an encoded bit series obtained by encoding an information bit series having a predetermined transmission rate and transmitting a transmission signal generated by applying predetermined transmission processing to the transmission symbol series through a predetermined communication channel, the present invention generates a transmission-information bit series having a transmission rate lower than a predetermined transmission rate in accordance with an information bit series, starts transmission of a transmission signal generated in accordance with the transmission-information bit series through a communication channel, makes the low transmission rate of the transmission-information bit series reach a predetermined transmission rate by stepwise increasing the low transmission rate, and performs transmission while stepwise increasing the number of communication channels to be used in accordance with the stepwise increase of the low transmission rate.

Claims

1. A transmission method for generating a transmission symbol series by applying predetermined modulation processing to an encoded bit series obtained by encoding an information bit series of a predetermined transmission rate and transmitting a transmission signal generated by applying predetermined transmission processing to said transmission symbol series through a predetermined communication channel, the method comprising the steps of:

generating the transmission-information bit series of a transmission rate lower than said predetermined transmission rate in accordance with said information bit series and starting the transmission of said transmission signal generated in accordance with said transmission-information bit series through said communication channel; and

making the low transmission rate-of said transmission-information bit series reach said predetermined transmission rate by stepwise increasing said low transmission rate and transmitting said transmission signal while stepwise increasing the number of said communication channels to be used in accordance with the stepwise increase of said low transmission rate.

2. The transmission method according to claim 1, wherein

transmission is performed with the minimum number of channels approx. {fraction (1/32)} or less the total number of said communication channels at the time of said transmission start.

3. The transmission method according to claim 1, wherein

transmission is performed with the minimum number of channels approx. {fraction (1/32)} or less the total number of said communication channels at the time of said transmission start to increase the number of channels to be used in accordance with the stepwise increase of said low transmission rate every above minimum number of channels.

4. The transmission method according to claim 1, wherein

the number of said communication channels to be used when reaching said predetermined transmission rate is previously assigned and the transmission of said transmission signal is started at said low transmission rate by using some of said channels to increase the number of channels to be used in accordance with the stepwise increase of said low transmission rate.

5. A transmitter for generating a transmission symbol series by applying predetermined modulation processing to an encoded bit series obtained by encoding an information bit series of a predetermined transmission rate and transmitting a transmission signal generated by applying predetermined transmission processing to said transmission symbol series through a predetermined transmission channel, said transmitter comprising:

transmission-signal generating means for generating a transmission-information bit series of a transmission rate lower than said predetermined transmission rate in accordance with said information bit series; and

transmitting means for transmitting said transmission signal by generating said transmission signal in accordance with said transmission-information bit series and thereafter, starting the transmission of said transmission signal through said communication channel and stepwise increasing the low transmission rate of said transmission-information bit series to make the low transmission rate reach said predetermined transmission rate while stepwise increasing the number of said communication channels used in accordance with the stepwise increase of said low transmission rate.

6. The transmitter according to claim 5, wherein

said transmitting means performs transmission with the minimum number of channels approx. {fraction (1/32)} or less the total number of said communication channels at the time of said transmission start.

7. The transmitter according to claim 5, wherein

said transmitting means performs transmission with the minimum number of channels approx. {fraction (1/32)} or less the total number of said communication channels at the time of said transmission start and moreover, increases the number of channels used in accordance with the stepwise increase of said low transmission rate every above minimum number of channels.

8. The transmitter according to claim 5, wherein

said transmitting means starts the transmission of said transmission signal at said low transmission rate by previously assigning the number of said communication channels used when reaching said predetermined transmission rate and using some of said channels and increases the number of channels to be used in accordance with the stepwise increase of said low transmission rate.

9. A receiver for generating a transmission symbol series by applying predetermined modulation processing to an encoded bit series obtained by encoding an information bit series of a predetermined transmission rate, generating a transmission signal by applying predetermined transmission processing to said transmission symbol series, and receiving said transmission signal transmitted through a predetermined communication channel, the receiver comprising:

receiving means for generating a transmission-information bit series of a transmission rate lower than said predetermined transmission rate in accordance with said information bit series and receiving said transmission signal transmitted when the transmission of said transmission signal generated in accordance with said transmission-information bit series is started through said communication channel and the low transmission rate of said transmission-information bit series is stepwise increased to reach said predetermined transmission rate while the number of said communication channels to be used in accordance with the stepwise increase of said low transmission rate is stepwise increased with the channels equal to the number of channels for said transmission signal;

demodulating means for generating a reception symbol series by applying predetermined demodulation processing to each of reception signals received by said receiving means; and

storing means for storing and outputting a reception bit series obtained by applying predetermined decoding to said reception symbol series.