handoff between the same intervention

Handoff can be divided into two types: handoff between the same intervention can be called horizontal handoff, the handoff between different types of intervention to can be called vertical handoff. The witching between CDMA and wireless I have done includes vertical handoff and horizontal handoff between CDMA and WLAN.Handoff process can be divided into three main discount wedding dresses stages. In accordance with the time and they must satisfy certain constraints at each stage of the order:1, Initiation Phase: This phase is responsible for measurements of signal quality or state of wireless links based on wireless transmission methods, but also may include a number of system parameters, and hereby dicide the need to determine the trigger handoff.2, Decision Phase: this cheap wedding gown dresses phase is to select access technology and network on the basis of data collected on the Cell.3, Execution Phase: this phase is construct new connection and cut the old connection, and the changing must the same to the selected line in second phase.Handoff trigger parameters are: the absolute signal intensity, with an absolute signal strength threshold, the relative signal strength with threshold, such as the relative signal strength.
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