Differentiate between hard handoff and soft handoff procedure. What is the relationship between a base station and mobile switching center?

Subject Computer Network
NU Year Set: 3.(c) Marks: 2+4=6 Year: 2017

Soft Handoff: It means the radio links are added and removed in a way that the MS always keeps at least one radio link to the UTRAN. ... Hard Handover:- When mobile(in Call) switches to a new sector/Cell which is on different frequency, then it performs hard Handover. It is basically an inter-frequency handover.

1. A mobile switching center (MSC) is the centerpiece of a network switching subsystem (NSS). The MSC is mostly associated with communications switching functions, such as call set-up, release, and routing. However, it also performs a host of other duties, including routing SMS messages, conference calls, fax, and service billing, as well as interfacing with other networks, such as the public, switched telephone network (PSTN).
2. The MSC is structured so that base stations connect to it, while it connects to the    PSTN. Because cellphones connect to these base stations, all forms of    communication, whether between two cell phones or between a cell phone and a landline telephone, travel through the MSC

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