Cellular/PCS CDMA system with increased sector capacity by using two radio frequencies

• US 6,483,823 B1
• Filed: 02/16/1999
• Issued: 11/19/2002
• Est. Priority Date: 02/16/1999
• Status: Expired due to Term

• Current Assignee: Sprint Spectrum LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Inventors: Mansour, Nagi A.
• Primary Examiner(s): Hsu, Alpus H.
• Assistant Examiner(s): Qureshi, Afsar M.
• Application Number:
  US09/250,646
• Time in Patent Office: 1,372 Days
• Field of Search: 370/252, 370/320, 370/332, 370/335, 370/342, 370/441, 370/492, 375/130, 375/151, 375/267, 375/335, 455/255, 455/259, 455/180.3, 455/442, 455/443, 455/437, 455/506, 455/522, 455/561, 455/562, 455/447
• US Class Current: 370/330
• CPC Class Codes: H04B 7/2628 using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] H04B7/2618 takes precedence
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

A CDMA cellular/PCS telecommunications cell of increased capacity includes a plurality of sectors controlled by a base station unit using a defined set of CDMA codes for each sector. Capacity is increased by adding a second base station unit operating at a different, non-interfering frequency.

Claims

1. In a CDMA cellular/PCS telecommunications network, a telecommunications cell comprising:

an antenna site configured into a plurality of sectors, with each sector having a first and a second antenna; and

a base station unit coupled with said antennas and operable for controlling transmission and reception thereover using selected ones of a defined set of CDMA codes for each of said sectors at a first frequency for the first antenna in each sector and using selected ones of a defined set of CDMA codes for each of said sectors at a second frequency for the second antenna in each sector.

2. The cell as set forth in claim 1, said antenna site including antennas oriented for configuring said site into three corresponding sectors.

3. The cell as set forth in claim 1, wherein said first frequency includes 1931.25 MHZ.

4. The cell as set forth in claim 1, wherein said second frequency includes 1933.75 MHZ.

5. The cell as set forth in claim 1, wherein said base station unit controls transmission and reception over each antenna simultaneously.

6. A method of operating a cell having an antenna site in a CDMA cellular/PCS telecommunications network, said method comprising the steps of:

(a) transmitting and receiving CDMA and cellular/PCS telecommunications at the antenna site by way of a plurality of antennas configuring the site into a plurality of sectors; and

(b) using a base station unit coupled with said antennas for transmitting and receiving using selected ones of a defined set of CDMA codes for each of said sectors at a first frequency and a second frequency.

7. The method as set forth in claim 6, step (b) including the step of using 1900 MHZ as said first frequency.

8. The method as set forth in claim 6, step (b) including the step of using 1924 MHZ as said first frequency.

9. the method as set forth in claim 6, step (a) including the step of using three antennas oriented for configuring the site into three sectors.