| US 7,499,423 B1 | ||
| System and method for clock distribution and synchronization and radio location | ||
| James A. Amos, North Canton, Ohio (US); and Clark Carty, Brunswick, Ohio (US) | ||
| Assigned to Cisco Technology, Inc. (US), | ||
| Filed on Jun. 10, 2004, as Appl. No. 10/865,545. | ||
| Int. Cl. H04B 7/212 (2006.01) | ||
| U.S. Cl. 370—324 [370/503; 370/507; 370/509; 370/512; 324/387; 455/456; 455/404] | 21 Claims |
| 1. A method for determining location in a wireless network having at least three access points, comprising the steps of:
determining the relative position of the at least three access points;
distributing a clock to synchronize clocking in the at least three access points;
receiving a packet at a first access point;
oversampling a correlation of the packet;
obtaining a first correlation peak; and
adjusting the relative position of the first access point using the correlation peak to represent a first coplanar point.
|