Patent ID: 7917134

Claim:
A method for the determination of deteriorations in the quality of a mobile telephony network on a day D, at an hour H or minute M, making use of one or more items of special equipment in the network, wherein the method implements a measurement means and a calculation means, characterised in that the method comprises at least: a stage for acquisition, at the Mobile Services Switching Centres (MSCs, commutation switches) of the network or at any other point in the network, of Usage Messages (UMs) ( 1 ) corresponding to each call by the recording of the data in the UMs in a storage means, a stage for selection (S 1 ) of a “call date” field for extracting the UMs ( 1 ) corresponding to each call on day D, at hour H or minute M, ( 2 a ) by comparing the value of a “call date” field associated with each UM ( 1 ) with the value of the “call date” field sought, wherein the UMs ( 1 ) are recorded in a storage means, a stage for characterising (S 2 ) groups of UMs corresponding to the calls from among the UMs of the selected calls ( 4 ) by comparing the value of a “previous call time difference” field associated with each UM with a value previously recorded in a storage means, wherein the UMs of each group have identical “client”, “caller” and “call date” fields, a stage for calculating at least one indicator (S 7 ) by grouping the UMs as a function of one or more common data fields, a stage for calculating a callback rate for an indicator, a stage for determining the quality of the transmissions in a section of the network defined by at least one field code common to several UMs, a stage of intervention to restore or improve the quality of the calls in a section of the network defined by at least one field code common to several UMs, and characterised in that the callback calculation stage applies an algorithm executing the following operation: Callback Rate=Number of Calls ( Number of Calls−Number of Callbacks).