Mobile networks
From Yate Documentation
(Difference between revisions)
| Line 17: | Line 17: | ||
The network and switching subsystem(NSS) | The network and switching subsystem(NSS) | ||
| − | * Home location register (HLR) | + | * Home location register (HLR) |
| − | * Authentication Center (AuC) | + | ** holds all subscribers in a network. |
| − | * Equipment inquiry register (EIR) | + | ** keeps subscriber specific information like MSISDN, IMSI, current location of the MS, roaming restrictions, additional features. |
| − | * Mobile switching center (MSC) | + | * Authentication Center (AuC) |
| + | ** handles the authentications and encryption in a network. | ||
| + | ** it is typically located with the HLR | ||
| + | * Equipment inquiry register (EIR) | ||
| + | ** tracks of handsets on the network using the International Mobile Equipment Identity (IMEI). | ||
| + | ** there is only one EIR per network. | ||
| + | ** It is composed of three lists. The white list, the gray list, and the black list. | ||
| + | * Mobile switching center (MSC) | ||
| + | ** handles call routing, call setup, and basic switching functions. | ||
| + | ** does inter BSC handoffs and coordinates inter MSC handoffs | ||
* GMSC | * GMSC | ||
| − | * Visitor location register (VLR) | + | * Visitor location register (VLR) |
| + | ** is associated a local area(LA). | ||
| + | ** Keeps information similar to the one in the HLR for the users in it's current local area | ||
Revision as of 14:44, 10 October 2012
A mobile network is composed by the following parts:
- Mobile Station (MS)
- The base stations subsystems (BSS)
- The network and switcing subsystem (NSS)
- The operations and support subsystem (OSS)
Mobile Station (MS):
- the mobile equipment (Ex: phone)
- the SIM (Subscriber identity Module) card that uniquely identified the card by the IMSI (International Mobile Subscriber Identity).
The base station subsystem (BSS):
- base station (BTS) - it defines a cell in the network
- base station controller (BSC) - controls a group of BTSs. Does handoffs, frequency hoppings, exchange functions and power control over each managed BTS
The network and switching subsystem(NSS)
- Home location register (HLR)
- holds all subscribers in a network.
- keeps subscriber specific information like MSISDN, IMSI, current location of the MS, roaming restrictions, additional features.
- Authentication Center (AuC)
- handles the authentications and encryption in a network.
- it is typically located with the HLR
- Equipment inquiry register (EIR)
- tracks of handsets on the network using the International Mobile Equipment Identity (IMEI).
- there is only one EIR per network.
- It is composed of three lists. The white list, the gray list, and the black list.
- Mobile switching center (MSC)
- handles call routing, call setup, and basic switching functions.
- does inter BSC handoffs and coordinates inter MSC handoffs
- GMSC
- Visitor location register (VLR)
- is associated a local area(LA).
- Keeps information similar to the one in the HLR for the users in it's current local area
