Method and apparatus for a high-capacity cellular network by improved sectorization and interleaved channel assignment

• US 6,580,912 B2
• Filed: 09/10/2001
• Issued: 06/17/2003
• Est. Priority Date: 10/19/1998
• Status: Expired due to Fees

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Wang, Li-Chun, Leung, Kin K.
• Primary Examiner(s): Nguyen, Lee
• Application Number:
  US09/948,816
• Publication Number:
  US 20020019233A1
• Time in Patent Office: 645 Days
• Field of Search: 455/422, 455/446, 455/447
• 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
• CPC Class Codes: H04W 28/16 Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]

Abstract

A method and apparatus for a high-capacity cellular network by improved sectorization and interleaved channel assignment is presented. Data transmission over a cellular network is carried out by implementation of a sectorization scheme, called the Narrow-Beam Quad-sector Cell (NBQC) sectorization scheme, and the corresponding Interleaved Channel Assignments (ICA). The NBQC sectorization scheme calls for each cell of a cellular network to be divided into four sectors, with each sector covered by a 60 degree antenna. Use of the NBQC sectorization scheme allows for implementation of the corresponding ICA, in which assignment of transmission channels to each cell is based on a re-use factor of N=2. Accordingly, the interleaved channel assignments allow for the use of the transmission channels in cells which are adjacent in the cellular network.

Claims

1. A method for creating a high-capacity cellular network having a plurality of cells, the method comprising:

sectorizing the cells to each have four sectors; and

assigning in an interleaved fashion at least one channel to each one of the plurality of sectors wherein;

sectorizing the cells to each have four sectors comprises;

sectorizing a first one of the cells into a first sector, a second sector, a third sector, and a fourth sector, and

sectorizing a second one of the cells into a fifth sector, a sixth sector, a seventh sector, and an eighth sector;

and assigning in an interleaved fashion at least one channel to each one of the plurality of sectors comprises;

assigning a first channel to both the first sector of the first cell and to the sixth sector of the second cell;

assigning a second channel to both the second sector of the first cell and to the fifth sector of the second cell;

assigning a third channel to both the third sector of the first cell and to the eight sector of the second cell; and

assigning a fourth channel to both the fourth sector of the first cell and to the seventh sector of the second cell.

2. A high-capacity cellular network, comprising:

a plurality of sectorized cells, each of the sectorized cells having four sectors;

wherein a frequency channel is assigned to each sector in an interleaved fashion wherein the plurality of cells comprise first and second cells, the first cell being sectorized into a first sector, a second sector, a third sector, and a fourth sector, wherein a first frequency channel is assigned to both the first sector of the first cell and to the sixth sector of the second cell, a second frequency channel is assigned to both the second sector of the first cell and to the fifth sector of the second cell, a third frequency channel is assigned to both the third sector of the first cell and to the eighth sector of the second cell, and a fourth frequency channel is assigned to both the fourth sector of the first cell and to the seventh sector of the second cell.