Communication resource allocation method and apparatus

• US 6,400,679 B1
• Filed: 01/21/1997
• Issued: 06/04/2002
• Est. Priority Date: 01/29/1996
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Suzuki, Mitsuhiro
• Primary Examiner(s): TON, DANG T
• Application Number:
  US08/785,792
• Time in Patent Office: 1,960 Days
• Field of Search: 370/208, 370/203, 370/206, 370/449, 370/215, 370/276, 370/477, 370/468, 370/395, 370/432, 370/480, 370/319-321, 370/324, 370/333-338, 370/341-345, 370/347, 370/350, 370/441, 370/442, 340/825.08, 375/200, 375/130, 375/140, 375/144, 375/145, 375/235, 375/237, 375/238, 375/239, 375/242, 375/261, 375/268, 455/500, 455/501, 455/502, 455/519, 455/516-518, 455/60
• US Class Current: 370/208
• CPC Class Codes: H04L 5/026 using code division

Abstract

A communication resource allocation method and apparatus services, in even the code division multiple access method (CDMA) considered to be suitable for radio transmission using mobile stations such as a cellular phone, a strict orthogonal relationship, so that received signals can be separated from each other completely. This reduces the problem whereby other mobile stations are interfering sources. It also reduces the problem whereby if an application band width for use is defined, the other band widths cannot be applied. The multi-carrier modulation section places a plurality of carriers continuously within a preliminary allocated band and modulates the individual carriers separately. An adder synthesizes a plurality of the carriers modulated by the multi-carrier modulation section. An antenna transmits a synthesized output from the adder.

Claims

1. A communication resource allocation method for allocating user signals for transmission in a communication system having a least a base station, comprising the steps of:

assigning a frequency band to the communication system for use by the base station, wherein said frequency band is simultaneously allocated among a plurality of original user signals, so that the plurality of original user signals continuously occupy the entire assigned frequency band;

allocating simultaneously a plurality of carriers continuously within each original user signal occupying said frequency band;

assigning at least one of the said plurality of the carriers to each original user of the system;

modulating said plurality of carriers in accordance with information to be transferred, so that said carriers are orthogonal to each other.

3. The communication resource allocation method as claimed in claim 1, wherein

each plurality of carriers assigned to each user form a carrier group and contain at least one power reduced carrier located between the carrier group and a next adjacent carrier group.

5. The communication resource allocation method as claimed in claim 1, further comprising the step of:

varying numbers of said plurality of carriers assigned to each user according to an information to be transferred.

2. A communication resource allocation apparatus for allocating user signals for transmission in a communication system having a plurality of base stations, comprising:

assigning means for assigning a frequency band to the system for use by one of said plurality of base stations, said frequency band being simultaneously allocated among a plurality of original signals, so that the plurality of original user signals continuously occupy the entire assigned frequency band;

carrier assigning means for simultaneously assigning a portion of said plurality of carriers to each original user of the system, and

multi-carrier modulating means for modulating said plurality of carriers in accordance with information to be transferred, so that said plurality of carriers are orthogonal to each other.

4. The communication resource allocation apparatus as claimed in claim 2, wherein said portion of said plurality of carriers assigned to each user form a carrier group and each said carrier group contains at least one power reduced carrier located between the carrier group and a next adjacent carrier group.

6. The communication resource allocation apparatus as claimed in claim 2, wherein numbers of said carriers in said portion of said plurality of carriers assigned to each user are varied in time according to an information to be transferred.

7. A transmitting method of allocating user signals in a communication system having plurality of base stations, comprising the steps of:

assigning a frequency band to the system for use by one of the plurality of base stations, said frequency band being simultaneously allocated among a plurality of original user signals so that the plurality of original user signals continuously occupy the entire frequency band;

allocating a plurality of carriers continuously within each original user signal occupying said frequency band;

simultaneously assigning a portion of said plurality of carriers to each of said plurality of original user signals corresponding to respective original users of the system;

modulating said carriers in accordance with information to be transferred, so that said plurality of carriers are mutually orthogonal;

synthesizing a plurality of said carriers modulated in said modulating step to produce a synthesized output of carrier modulation signals; and

transmitting said synthesized output of carrier modulation signals.

11. The transmitting method as claimed in claim 7, further comprising the step of

varying numbers of said plurality of carriers assigned to each user signal in time to each user signal according to an information to be transferred.

8. A transmitting apparatus for allocating user signals in a communication system having a plurality of base stations, comprising:

multi-carrier modulation means for simultaneously allocating a plurality of carriers continuously within each of a plurality of original user signals continuously occupying one of a plurality of predetermined frequency bands respectively assigned for each of said plurality of base stations and for modulating said carriers in accordance with information to be transferred, so that said plurality of carriers are mutually orthogonal, wherein each of said plurality of original user signals contains a portion of said plurality of carriers;

adding means for synthesizing a plurality of said carriers modulated by said multi-carrier modulation means to produce a synthesized output of carrier modulation signals; and

transmitting means for transmitting said synthesized output of carrier modulation signals.

9. The transmitting method as claimed in claim 8, wherein

each portion of said plurality of carriers assigned to each user signal forms a carrier group and contains at least one power reduced carrier located between the carrier group and a next adjacent carrier group.

10. The transmitting apparatus as claimed in claim 8, wherein

each portion of said plurality of carriers assigned to each user signal forms a carrier group and contains at least one power reduced carrier located between the carrier group and a next adjacent carrier group.

12. The transmitting apparatus as claimed in claim 8, wherein numbers of said plurality of carriers assigned to each user signal are varied in time according to an information to be transferred.

13. A transmitting and receiving method for transmitting and receiving allocated user signals in a communication system having a plurality of base stations, comprising the steps of:

assigning a respective frequency band to each of said plurality of base stations, wherein each frequency band is occupied by a plurality of sequentially arranged original user signals, so that the plurality of original user signals continuously occupy the entire frequency band;

allocating simultaneously a plurality of carriers continuously within each of said plurality of original user signals;

simultaneously assigning at least one of said carriers to each original user of the system;

modulating said carriers in accordance with information to be transferred, so that said plurality of carriers are mutually orthogonal;

synthesizing a plurality of said carriers modulated by said modulating step to produce a synthesized output of carrier modulation signals;

transmitting said synthesized output of carrier modulation signals;

receiving said synthesized output of carrier modulation signals;

demodulating said synthesized output of carrier modulation signals to produce respective demodulation signals; and

synthesizing said respective demodulation signals.

16. The transmitting and receiving method as claimed in claim 13, wherein

said plurality of carriers in each user signal form a carrier group and contain at least one power reduced carrier located between the carrier group and a next adjacent carrier group.

19. The transmitting and receiving method as claimed in claim 13, further comprising the step of:

varying numbers of said plurality of carriers in time in each portion assigned to each user signal according to an information to be transferred.

14. A communication subscriber apparatus for use in a communication resource allocation system for allocating user signals in a communication system having a plurality of base stations, comprising:

multi-carrier modulation means for allocation simultaneously a plurality of carriers continuously within each of a plurality of original user signals continuously occupying on eof a plurality of predetermined frequency bands respectively assigned for each of said plurality of base stations and for modulating said carriers in accordance with the information to be transferred, so that said plurality of carriers are mutually orthogonal, and wherein each of said plurality of frequency bands is divided into a plurality of original user signals and each of said plurality of original user signals contains a portion of said plurality of carriers;

adding means for synthesizing a plurality of said carriers modulated by said multi-carrier modulation means to produce a synthesized output of carrier modulation signals;

transmitting means for transmitting said synthesized output of carrier modulation signals;

receiving means for receiving said synthesized output of carrier modulation signals;

demodulating means for demodulating said synthesized output of carrier modulation signals to produce respective demodulation signals; and

synthesizing means for synthesizing said respective demodulation signals.

17. The communication subscriber apparatus as claimed in claim 14, wherein

said plurality of carriers in each user signal form a carrier group and contain at least one power reduced carrier located between the carrier group and a next adjacent carrier group.

20. The communication subscriber apparatus as claimed in claim 14, wherein

numbers of each portion of said plurality of carriers assigned to each user signal are varied in time according to an information to be transferred.

15. A communication base station apparatus, being assigned a predetermined frequency band formed of a plurality of user signals, comprising:

multi-carrier modulation means for allocating a plurality of carriers continuously within each of said plurality of user signals and for modulating said carriers in accordance with information to be transferred, so that each of said plurality of carriers are mutually orthogonal;

adding means for synthesizing a plurality of said carriers modulated by said multi-carrier modulation means and to produce a synthesized output of carrier modulation signals;

transmitting means for transmitting said synthesized output of carrier modulation signals;

receiving means for receiving said synthesized output of carrier modulation signals;

demodulating means for demodulating said synthesized output of carrier modulation signals to produce respective demodulation signals; and

synthesizing means for synthesizing respective demodulation signals.

18. The communication base station apparatus as claimed in claim 15, wherein

said plurality of carriers in each of said plurality of user signals form a carrier group and contain at least one power reduced carrier located between the carrier group and a next adjacent carrier group.

21. The communication base station apparatus as claimed in claim 15, wherein

numbers of said plurality of carriers forming each of said plurality of user signals are varied in time according to an information to be transferred.