Method and apparatus for providing a synchronous communication environment

• US 5,784,368 A
• Filed: 09/23/1994
• Issued: 07/21/1998
• Est. Priority Date: 09/23/1994
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Weigand, David L., Malek, Charles John
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Patel, Ajit
• Application Number:
  US08/311,467
• Time in Patent Office: 1,397 Days
• Field of Search: 370/18, 370/98, 370/29, 370/103, 370/100.1, 370/105.3, 370/95.1, 370/95.3, 370/324, 370/350, 370/503, 370/507, 370/509, 370/510, 370/512, 375/356, 375/354, 455/51.1, 455/56.1, 455/71, 455/13.3, 455/51.2, 455/524, 455/502, 455/503
• US Class Current: 370/350
• CPC Class Codes: H04B 7/269 Master/slave synchronisation

Abstract

An apparatus and method provides synchronous communication in a communication environment (102) wherein multiple base stations are adapted to operate on the same frequencies. In particular, the base stations which operate within range of one another must be coordinated to minimize interference with other base stations which may otherwise operate independently. Each base station operating in a system will determine whether another base station operating on the same frequencies is within range (310). One of the base stations will assume a role as a master and the remaining base station will then synchronize to the master base station (312). The preferred methods for synchronizing the base stations includes signaling protocols (702, 902) and collision avoidance techniques for digital multiple access communication systems.

Claims

1. A method for providing synchronous communication in a communication system having a plurality of base stations adapted to operate within range of one another, said method comprising the steps of:

detecting a beacon signal from a first base station and a second base station at a third-base station;

synchronizing said third base station to said first base station;

detecting, at said second base station, a beacon signal from a third base station; and

synchronizing said second base station to said third base station.

2. The method for providing synchronous communication according to claim 1 wherein said step of detecting a beacon signal from said third base station comprises detecting handset traffic from a handset associated with said third base station.

3. The method for providing synchronous communication according to claim 1 wherein said step of detecting said beacon signal from said third base station includes detecting handset traffic on a blank slot of a message frame associated with said third base station.

4. A method for providing synchronous communication in a communication system having a plurality of base stations adapted to operate within range of one another, said method comprising the steps of:

detecting a beacon signal from each of a first base station and a second base station at a third base station;

synchronizing said third base station to said first base station;

generating a beacon signal at said third base station;

detecting, at said second base station, said beacon signal generated at said third base station; and

synchronizing said second base station to said third base station.

5. A method for providing synchronous communication in a communication system having, a plurality of base stations adapted to operate within range of one another, said method comprising the steps of:

detecting a beacon signal from each of a first base station and a second base station at a third base station;

synchronizing said third base station to said first base station;

detecting at said second base station handset traffic from a handset adapted to communicate with said third base station; and

synchronizing said second base station to said third base station based upon said handset traffic.