Patent ID: 7245649
Filing Date: 2007-07-17
Classification: H04B

Abstract:
1. A method for establishing a connection by a scanner device to a paging device over a sequence of hop channels, the method comprising the steps of repeatedly activating the scanner device; selecting by the scanner device a hop channel from the sequence of hop channels as a function of a present phase when the scanner device is activated; determining by the scanner device whether the selected hop channel is a forbidden hop channel; selecting by the scanner device a substitute hop channel from the sequence of hop channels as the selected hop channel if the selected hop channel is a forbidden hop channel, wherein the substitute hop channel is selected using a time-varying parameter; monitoring by the scanner device the selected hop channel for receipt of a paging message from the paging device during the present phase; establishing a connection from the scanner device to the paging device in response to receipt of the paging message; and wherein selecting a substitute hop channel comprises forming an index value from the time-varying parameter and selecting the substitute hop channel from the sequence of hop channels using the index value, wherein the index value is formed from the expression: index value=(the time-varying parameter modulo N)+BASE_VALUE, where N is the number of hop channels in the sequence of hop channels and BASE_VALUE represents an index value of a first hop channel in the sequence of hop channels.