MOBILE STATION SERVICE QUALIFICATION in Visual C#

Reading QR Code in Visual C# MOBILE STATION SERVICE QUALIFICATION

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stored in the subscriber s service profile Network access can be either allowed or denied on the basis of service or financial criteria defined for that subscriber Managing service profile information consists of handling the specific set of features and service capabilities, including service restrictions, associated with the subscriber An example of this information is a restriction on the types of calls a subscriber can make, such as limitations on long-distance or international calls A subscriber s HLR service profile record is the network repository for the subscriber s service qualification information

MOBILE STATION LOCATION MANAGEMENT MS location management is the set of functions that stores, updates, and cancels the MS s (ie, subscriber s) location When the subscriber initially registers with the network, the current location is stored in the service profile record As the subscriber moves from one serving area to another, the location is updated The subscriber s location is canceled in the network when the subscriber is no longer considered active (for example, when the MS is turned off) When a VLR serves multiple MSCs, or when a system serves multiple markets, many levels of the MS s location resolution are possible (see Figure 57):

The serving market ID If the MS is authorized for service for a particular market, the HLR will be provided a location update if the market changes, even if the serving VLR remains constant The serving MSC ID If the MS is authorized for service at the serving MSC s MSC ID, the HLR will be provided a location update if the MSC ID changes or if the serving VLR changes (these two are the same for a serving system [MSC/VLR] that has a single MSC ID) The serving location area ID If the MS is authorized for service in the location area of the serving MSC, the HLR will be provided a location update if the location area changes or if the serving VLR changes

MOBILE STATION STATE MANAGEMENT MS state management is the set of functions that manages the activity status of the MS (ie, the subscriber) The subscriber s state is considered by the network to be either active or inactive When the state is active, the subscriber is considered available to receive calls When the state is inactive, calls are generally not sent to the subscriber by the network The subscriber s state is considered inactive when the subscriber is not registered, outside the radio

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coverage area, or is intentionally inaccessible based upon the modes of certain features or capabilities

MSC ID = SWNO, SID (SWNO = 1, SID = 1) MSC ID = SWNO, SID (SWNO = 2, SID = 1) MSC/VLR MSC/VLR cell site cell site ID = 1 cell site ID = 2 cell site ID = 3 ID = 4 cell site ID = 1 cell site ID = 2 cell site ID = 3 cell site ID = 4

Figure 57 In ANSI-41, the location of a mobile station can be resolved to the SID only, MSC ID (SWNO and SID), or to a location area representing a group of cells

Authentication Authentication is a mobility management process by which information is exchanged between an MS and the network for the purpose of authenticating (ie, verifying with a strong degree of confidence) the identity of the MS Authentication provides robust security against unauthorized or fraudulent access to the network above and beyond simple subscriber validation Note that the authentication process requires an authentication-capable MS as well as the network support to perform the ANSI-41 authentication intersystem operations and calculations The authentication process is designed to be performed while a subscriber is in the home system or roaming This means that if a subscriber with an authentication-capable MS roams to a network that is authentication capable, the network can challenge the MS to prove authenticity

BACKGROUND AND NEED FOR AUTHENTICATION Fraud has become a widespread problem in the wireless industry The most well-known type of fraud in wireless networks is cloning fraud Cloning is accomplished by reprogramming an MS with the identification values of a valid MS (ie, the MIN and ESN) The valid identification values are typically obtained by illegally scanning the control channels on the air interface It is relatively easy to obtain the identification data of legitimate sub-

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