Patent ID: 6643319
Filing Date: 2003-11-04
Classification: H04B,H04J,H04W

Abstract:
A method of communicating by a first group of terminals, comprising the steps of:sensing, by a host terminal of the first group, spreading codes which are vacant and available for use by the first group; transmitting, by the host terminal of the first group, a confirmation packet indicating a desire to use one of the spreading codes which is vacant; waiting, by the host terminal of the first group, for a response to the confirmation packet, and when a response is received from a terminal of a second group of terminals which indicates that the one of the spreading codes is busy, selecting another one of the spreading codes which is vacant and repeating the steps of transmitting and waiting; and communicating, by the terminals of the first group, using code-division multiple access communication using one of the spreading codes which was determined to be vacant and for which no busy response was received.