Patent ID: 6377563
Filing Date: 2002-04-23
Classification: H04W

Abstract:
A handoff method applicable to a mobile communication system comprising the steps of:a first step of requesting a handoff service repeatedly with a regular interval based on a timer from a mobile station to a service base station until the mobile station receives the handoff service if a pilot strength of a neighboring base station is greater than a base station pilot strength value (T-ADD) when the mobile station enters a handoff service region, said first step including the steps of 1(a) determining whether the handoff service request is a first request if the pilot strength of the neighboring base station is greater than the base station pilot strength value (T-ADD) and the mobile station does not receive the handoff service while it is located with a soft handoff region; 1(b) transmitting the handoff service request to the service base station and activating the handoff timer if the handoff service request is a first request according to a result of determination at said step 1(a); 1(c) determining whether the handoff timer is stopped if the handoff service request is not the first request according to a result of determination at said third step 1(a); and 1(d) resetting the handoff timer after the handoff service request is transmitted immediately if the handoff timer is expired and returning to said first step if the handoff timer is not stopped according to a result of determination at said step 1(c); and a second step of holding back a new call service in the neighboring base station if the mobile station requesting the handoff service does not receive the handoff service and assigning a released channel to the mobile station requesting repeatedly the handoff service if a released call is present.