Method and system for improved beacon acquisition performance with time slot and antenna sector reuse

• US 8,027,674 B2
• Filed: 08/08/2007
• Issued: 09/27/2011
• Est. Priority Date: 09/20/2002
• Status: Expired due to Fees

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Rudolf, Marian
• Primary Examiner(s): Trinh; Sonny
• Application Number:
  US11/890,877
• Publication Number:
  US 20080039148A1
• Time in Patent Office: 1,511 Days
• Field of Search: 455/434, 455/452.1, 455/452.2, 455/561, 455/562.1, 455/435.2, 370/332, 370/337, 370/280, 370/294
• US Class Current: 455/434
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04W 16/00 Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 48/12 using downlink control channel

Abstract

A wireless multi-cell communication system, such as a time division duplex (TDD) system, includes at least one wireless transmit/receive unit (WTRU) and a plurality of base stations which broadcast beacon signals into a plurality of sectors of a cell of the system. Beacon channel acquisition performance is enhanced by reducing beacon channel mutual interference. Each of the base stations broadcasts a beacon signal into at least one of the cell sectors in a first time slot and to at least another one of the cell sectors in a second time slot different from the first time slot. The WTRU determines, at a particular position, which one of the beacon signals has the best signal quality, acquires the one beacon signal and establishes communications via the base station that generated the one beacon signal having the best signal quality.

Claims

1. A method implemented in a wireless multi-cell communication system including a plurality of cells and a plurality of base stations, wherein each cell has at least three cell sectors, the method comprising:

each base station broadcasting a beacon signal into two of the at least three cell sectors in a first time slot; and

each base station broadcasting a beacon signal into the remaining cell sector(s) in a second time slot different from the first time slot.

2. The method of claim 1 further comprising:

determining, at a particular position, which one of the beacon signals has a best signal quality; and

acquiring the one beacon signal and establishing communications via the base station that generated the one beacon signal having the best signal quality.

3. The method of claim 2 wherein the determining and the acquiring are performed by at least one wireless transmit/receive unit (WTRU) located at the particular position.

4. The method of claim 1 wherein the wireless multi-cell communication system is a time division duplex (TDD) system.

5. The method of claim 1 wherein each of the time slots is offset from each of the other time slots by a predetermined number of time slots.