Patent ID: 7805138
Filing Date: 2010-09-28
Classification: H04W

Abstract:
1. A system, comprising: a high threshold for roaming out of a home network; a minimum threshold for roaming into the home network; a mobile terminal for use in the home network and at least one roaming agreement partner network; and a roaming criteria in the home network and in the at least one roaming agreement partner network that is structured such that, when the high threshold is exceeded, the mobile terminal always roams out of the home network and, when the minimum threshold is met, the mobile terminal immediately roams into the home network; such that handoff into a roaming agreement partner network occurs only when a predetermined cell in the roaming agreement partner network offered the highest signal strength, and handoff into the home network occurs as soon as the mobile terminal did not receive the strongest signal from the roaming agreement predetermined off-network cell; and such that the high threshold being exceeded occurs when the mobile terminal has detected a signal strength in excess of the high threshold from each off-network cell of a first predetermined number of off-network cells, wherein the minimum threshold is met when the mobile terminal has detected a signal strength that exceeds the low threshold from each off-network cell of a second predetermined number of off-network cells, and wherein the first predetermined number is greater than the second predetermined number.