Mobile radio telephone system

• US 6,289,221 B1
• Filed: 01/20/1998
• Issued: 09/11/2001
• Est. Priority Date: 01/20/1998
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Ritter, Gerhard
• Primary Examiner(s): Trost, William
• Assistant Examiner(s): Gesesse, Tilahun
• Application Number:
  US09/009,899
• Time in Patent Office: 1,330 Days
• Field of Search: 455/447, 455/448, 455/449, 455/450, 455/454, 455/561, 455/562, 455/446, 455/464, 455/552, 455/553
• US Class Current: 455/447
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/12 Fixed resource partitioning
• CPC Class Codes: H04W 16/24 Cell structures

Abstract

A mobile radio telephone system comprises a plurality of operatively coupled base stations, having first and second radio communications apparatus which operate to effect radio communications with at least one mobile station via first and second radio signals with radio frequencies which occupy common parts of the radio frequency spectrum, wherein a frequency re-use pattern associated with the first radio communications apparatus is substantially matched to a frequency re-use pattern associated with the second radio communications apparatus.

Claims

1. A mobile radio telephone system comprising:

a plurality of operatively coupled base stations, said base stations having first and second radio communications apparatus which effect radio communications with at least one mobile station via at least first and second radio signals having radio frequencies which occupy a common radio frequency spectrum,

wherein

a first frequency re-use pattern associated with said first radio communications apparatus is at least substantially matched to a second frequency re-use pattern associated with said second radio communications apparatus; and

a plurality of cells, each of said cells being associated with at least one of said base stations,

wherein

a cluster size associated with the first radio communications apparatus is at least substantially equal to a cluster size associated with the second radio communications apparatus scaled by a predetermined factor, to provide a match between the first and the second frequency re-use patterns associated with the first and the second communications apparatus.

2. A mobile radio telephone system according to claim 1, wherein a bandwidth occupied by said second radio signals is substantially greater than a bandwidth occupied by said first radio signals.

3. A mobile radio system as claimed in claims 2, wherein a predetermined factor is substantially equal to a ratio of the bandwidth of said second radio frequency signal compared with a bandwidth of said first radio frequency signal.

4. A mobile radio system as claimed in claim 3, wherein said predetermined factor R is calculated from the following equation;

$R=\frac{B_{\mathrm{wide}}}{n\times <br><br>B_{\mathrm{narrow}}}$

where B_narrow is the bandwidth of said second radio signal, B_wide is the bandwidth of said first radio signals, and n is a scalar.

5. A mobile radio system as claimed in claim 1, wherein said first radio communications apparatus is a cellular radio communications system.

6. A mobile radio system as claimed in claim 4, wherein said scalar is an integer.

7. A mobile radio telephone system as claimed in claim 1, wherein said first radio communications apparatus is a cordless radio communications system.

8. A mobile radio system as claimed in claim 1, wherein said second radio communications apparatus is a code division multiple access system.

9. A mobile radio system as claimed in claim 8, wherein the code division multiple access system is a time division/code division multiple access system.

11. A mobile radio system as claimed in claim 1, further comprising:

a control unit, coupled to said base stations and arranged to control a distribution of carrier frequencies to said first and said second communications apparatus.

10. A mobile radio telephone system comprising:

a plurality of operatively coupled base stations, said base stations having first and second radio communications apparatus which effect radio communications with at least one mobile station via at least first and second radio signals having radio frequencies which occupy a common radio frequency spectrum;

wherein

a first frequency re-use pattern associated with said first radio communications apparatus is at least substantially matched to a second frequency re-use pattern associated with said second radio communications apparatus; and

wherein

said second radio communications apparatus comprises a means for communicating data via said second radio signal which has a different amount of co-channel interference present at a receiver of said second communications apparatus than can be tolerated by said first radio signals at a receiver of said first radio communications apparatus.

12. A mobile radio telephone system as claimed in claim 10, further comprising:

a control unit, coupled to said base stations and arranged to control a distribution of carrier frequencies to said first and said second communications apparatus.

13. A mobile radio telephone system according to claim 10, wherein a bandwidth occupied by said second radio signals is substantially greater than a bandwidth occupied by said first radio signals.

14. A mobile radio system as claimed in claim 13, wherein a predetermined factor is substantially equal to a ratio of the bandwidth of said second radio frequency signal compared with a bandwidth of said first radio frequency signal.

15. A mobile radio system as claimed in claim 14, wherein said predetermined factor R is calculated from the following equation;

$R=\frac{B_{\mathrm{wide}}}{n\times <br><br>B_{\mathrm{narro}}}$

where B_narrow is the bandwidth of said second radio signal, B_wide is the bandwidth of said first radio signals, and n is a scalar.

16. A mobile radio system as claimed in claim 10, wherein said first a radio communications apparatus is a cellular radio communications system.

17. A mobile radio system as claimed in claim 15, wherein said scalar is an integer.

18. A mobile radio telephone system as claimed in claim 10, wherein said first radio communications apparatus is a cordless radio communications system.

19. A mobile radio system as claimed in claim 10, wherein said second radio communications apparatus is a code division multiple access system.

20. A mobile radio system as claimed in claim 19, wherein the code division multiple access system is a time division/code division multiple access system.

21. A mobile radio telephone system comprising:

a plurality of operatively coupled base stations, said base stations having first and second radio communications apparatus which effect radio communications with at least one mobile station via at least first and second radio signals having radio frequencies which occupy a common radio frequency spectrum;

wherein

a first frequency re-use pattern associated with said first radio communications apparatus is at least substantially matched to a second frequency re-use pattern associated with said second radio communications apparatus; and

wherein

the base stations further comprise directional antennas which divide each associated cell into a plurality of sectors, each sector being allocated to at least one different radio frequency carrier from at least one of said first and said second radio communications apparatus.

22. A method of combining first and second radio communications apparatus in a mobile radio system, comprising the steps of:

allocating carrier frequencies in accordance with a first frequency re-use pattern associated with the first radio communications apparatus to a plurality of base stations, and

matching carrier frequencies in accordance with a second frequency re-use pattern associated with the second communications apparatus to the first frequency re-use pattern; and

arranging a cluster size of the first frequency re-use pattern to be substantially equal to a cluster size of the second frequency re-use pattern, scaled by a predetermined factor.

23. A method of combining first and second radio communications apparatus as claimed in claim 22, wherein a bandwidth occupied by said second radio frequency signals is substantially equal to a bandwith occupied by said first radio frequencies scaled by said predetermined factor.