Three cell wireless communication system

• US 5,850,600 A
• Filed: 06/16/1997
• Issued: 12/15/1998
• Est. Priority Date: 04/08/1991
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Omnipoint Corp. (Deutsche Telekom AG)
• Inventors: Dixon, Robert C.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): BANKS HAROLD, MARSHA DENISE
• Application Number:
  US08/876,775
• Time in Patent Office: 547 Days
• Field of Search: 455/422, 455/432, 455/436, 455/443, 455/517, 455/524, 375/200, 370/335, 370/337
• US Class Current: 455/422.1
• CPC Class Codes: H04B 2201/70702 Intercell-related aspects
• CPC Class Codes: H04J 13/16 Code allocation
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/12 Fixed resource partitioning

Abstract

A wireless communication system including a repeated pattern of cells, in which base station transmitters and user station transmitters for each cell may be assigned a spread-spectrum code for modulating radio signal communication in that cell. Radio signals used in that cell are spread across a bandwidth sufficiently wide that both base station receivers and user station receivers in an adjacent cell may distinguish communication which originates in one cell from another. Adjacent cells may use distinguishable frequencies and distinguishable codes, but it is sufficient if adjacent cells use distinguishable frequencies and identical codes. A repeated pattern of cells allows the codes each to be reused in a plurality of cells.

Claims

1. A wireless communication system, comprising:

a pattern of cells;

a base station; and

one or more user stations;

wherein said base station and said user stations communicate using time division multiple access;

wherein said base station is assigned a first transmission frequency for transmitting to a first cell in said pattern of cells, said first transmission frequency not being assigned to any base station for transmitting to any cell in said pattern of cells adjacent to said first cell;

wherein each user station in said first cell is assigned a second transmission frequency for transmitting to said base station for the respective first cell, said second transmission frequency not being assigned to any user station in any cell in said pattern of cells adjacent to said first cell.

2. The wireless communication system of claim 1, wherein said first transmission frequency is from a first set comprised of a limited first predetermined number of frequencies and wherein said second transmission frequency is from a second set comprised of a limited second predetermined number of frequencies, whereby said first set of frequencies is different than said second set of frequencies.

3. The wireless communication system of claim 2, wherein said first predetermined number of frequencies is three and said second predetermined number of frequencies is three.

4. The wireless communication system of claim 1, wherein said base station is dynamically assigned said first transmission frequency.

5. The wireless communication system of claim 1, wherein the user stations in said first cell are dynamically assigned said second transmission frequency.

6. The wireless communication system of claim 1, wherein transmissions between said base station transmitting to said first cell and the user stations in said first cell are time division duplexed.

7. A wireless communication system, comprising:

a pattern of cells;

one or more base stations; and

one or more user stations;

wherein said base stations and said user stations communicate using time division multiple access;

wherein a base station which transmits to a first cell in said pattern of cells is assigned a first transmission frequency for transmitting to said first cell, said first transmission frequency not being assigned to any base station for transmitting to any cell in said pattern of cells adjacent to said first cell;

wherein each user station in said first cell is assigned said first transmission frequency for transmitting to said base station which transmits to said first cell;

wherein the communications between said base station which transmits to said first cell and the user stations in said first cell are time division duplexed.

8. The wireless communication system of claim 7, wherein a user station in said first cell transmits data communication messages which include station identification information.

9. The wireless communication system of claim 7, wherein said base station which transmits to said first cell is dynamically assigned said first transmission frequency.

10. The wireless communication system of claim 7, wherein a user station is dynamically assigned said first transmission frequency when it enters said first cell.

11. The wireless communication system of claim 7, wherein said pattern of cells comprises a repeated pattern of cells consisting essentially of a first class of cells, a second class of cells, and a third class of cells, wherein no member of said first class of cells is adjacent to another member of said first class of cells, no member of said second class of cells is adjacent to another member of said second class of cells, and no member of said third class of cells is adjacent to another member of said third class of cells.

12. A wireless communication system, comprising:

a pattern of cells;

a base station; and

one or more user stations;

wherein said base station is assigned a first transmission frequency for transmitting to a first cell in said pattern of cells, said first transmission frequency not being assigned to any base station for transmitting to any cell in said pattern of cells adjacent said first cell;

wherein said user stations in said first cell are assigned a second transmission frequency, said second transmission frequency not assigned to any user stations in any cell in said pattern of cells adjacent said first cell;

wherein said base station is further assigned a first spread spectrum code for modulating radio communication for said first cell; and

wherein said user stations in said first cell are each assigned a second spread spectrum code for modulating radio communication from said first cell.

13. The wireless communication system of claim 12, wherein said first transmission frequency is from a first set comprised of a limited first predetermined number of frequencies and wherein said second transmission frequency is from a second set comprised of a limited second predetermined number of frequencies.

14. The wireless communication system of claim 13, whereby the frequencies of said first set of frequencies are mutually exclusive of the frequencies of said second set of frequencies.

15. The wireless communication system of claim 13, wherein said first predetermined number of frequencies is three and said second predetermined number of frequencies is three.

16. The wireless communication system of claim 12, wherein said base station is dynamically assigned said first transmission frequency.

17. The wireless communication system of claim 12, wherein a user station is dynamically assigned said second transmission frequency when it enters said first cell.

18. The wireless communication system of claim 12, wherein each base station servicing said pattern of cells uses said first spread spectrum code for modulating radio communication for said pattern of cells and wherein each user station in said pattern of cells uses said second spread spectrum code for modulating radio communications from said pattern of cells.

19. The wireless communication system of claim 12, wherein said pattern of cells comprises a repeated pattern of cells consisting essentially of a first class of cells, a second class of cells, and a third class of cells, wherein no member of said first class of cells is adjacent to another member of said first class of cells, no member of said second class of cells is adjacent to another member of said second class of cells and no member of said third class of cells is adjacent to another member of said third class of cells.

20. The wireless communication system of claim 12, wherein said first spread spectrum code and said second spread spectrum code comprise a set of codes with minimal cross-correlation attributes.