PCS CDMA cell having increased sector capacity

• US 6,741,582 B1
• Filed: 01/31/2000
• Issued: 05/25/2004
• Est. Priority Date: 02/16/1999
• Status: Expired due to Term

• Current Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Mansour, Nagi A.
• Primary Examiner(s): Nguyen, Duc M.
• Application Number:
  US09/495,439
• Time in Patent Office: 1,576 Days
• Field of Search: 370/328, 370/329, 370/335, 370/342, 370/333, 370/441, 455/446, 455/447, 455/450, 455/454, 455/561, 455/562, 455/509
• US Class Current: 370/342
• CPC Class Codes: H04B 2201/70701 featuring pilot assisted reception
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04B 7/0491 using two or more sectors, i.e. sector diversity
• 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: H04J 13/004 Orthogonal

Abstract

A CDMA PCS telecommunications cell (40) of increased capacity includes a plurality of sectors (42, 44, 46) controlled by a base station (14) using a defined set of CDMA codes for each sector. Cell capacity is increased by using two antennas for each sector corresponding to two subsectors with each using a subset of the CDMA codes defined for the sector and with each subset including a pilot channel.

Claims

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

an antenna site configured into a plurality of sectors and including antennas for transmission and reception of CDMA PCS telecommunications traffic for the sectors;

a base station coupled with the antennas and operable for controlling the transmission and reception over the antennas using selected ones of a defined set of CDMA codes for each of said sectors;

the antennas including, for a selected sector, a plurality of antennas oriented to configure the selected sector into a plurality of subsectors; and

the base station being operable for controlling telecommunications traffic for each of the sectors using selected ones of a defined set of sixty-four CDMA Walsh codes and using two different subsets thereof for the subsectors with each subset including a pilot channel and a synchronization channel, one of the subsectors using channel 0 as the pilot channel and channel 32 as the synchronization channel, and with the other subsectors using channel 33 as the pilot channel and channel 64 as the synchronization channel.

2. In a CDMA PCS telecommunications network, a telecommunications cell comprising:

an antenna site configured into a plurality of sectors and including antennas for transmission and reception of CDMA PCS telecommunications traffic for the sectors;

a base station coupled with the antennas and operable for controlling the transmission and reception over the antennas using selected ones of a defined set of CDMA codes for each of said sectors;

the antennas including, for a selected sector, a plurality of antennas oriented to configure the selected sector into a plurality of subsectors; and

the base station operable for controlling telecommunications traffic for the selected sector over the antennas using a plurality of different subsets of the defined set of 64 CDMA Walsh codes for the respective subsectors with each subsector including a pilot channel and a synchronization channel that is different from pilot and synchronization channels used in other subsectors of the selected sector, one of the subsectors using code 0 as the pilot channel and code 32 as the synchronization channel, and with the other subsectors using code 33 as the pilot channel and code 64 as the synchronization channel.