Important in wireless networks
Because of the low delay requirements than the recharge price conversational class and the streaming, interactive and background class provide less error-rate by appropriate encoding schemes and re transmission. The traffic of interactive class has a higher priority than the background traffic and therefore mobile recharge api it can only use the resources freed by interactive traffic. This feature is important in networks, since the bandwidth available is much lower than that used in fixed networks.
UE (User Equipment) is the mobile terminal for recharge price which you need the user to take advantage of all the services offered by the network. UMTS is based on the same principles of GSM, distinguishing between the physical equipment, ME (Mobile Equipment) and identification card USIM (UMTS Subscriber mobile recharge api Identity Module). As with GPRS, there are several types of EU, according to the operating mode supported.
And in fact provided the possibility of using only the circuit-switched services, only this packet switching, or both. UTRAN (UMTS Radio Access Network): is the entity dedicated to network access control through the management of radio resources available. The UTRAN is the only entity that most differentiates the UMTS system compared to GPRS, mainly due to the introduction of the technique recharge price of multiplexing code division instead of the time division used in cellular systems GSM/ GPRS.
CN (Core Network) is users with the various services required: can be connected with networks of different types that support a variety of communication protocols. It is mobile recharge api the task of the different network operators to define and negotiate interconnection with external ones (PDN or other). The UMTS core network incorporates the GSM Phase 2+ with GPRS and CAMEL.
This is to allow operators to protect investments in the mobile recharge api second generation, thus reducing the risks. The base station (BSS, Base Station Subsystem) is the functional entity delegated to communicate with a GSM a particular geographical area; the area controlled by a BSS can be formed by one or more cells, each served by a network element defined as BTS (Base Transceiver Station). The entity that oversees all the BTS is identified as BSC (Base Station Controller).
In the GSM system (and in all the following based on it) there is a clear separation between network elements that deal with the management of radio access mobile recharge api by those who should occupy the problems of the fixed network. The BSS (as with BTS+ recharge price BSC) is appointed to carry out the services of reception and transmission of information (ensuring a good quality of transmission) and control radio resource.
Terminal in mobile recharge api
The mobile switching centre (MSC, Mobile Switching Centre) and the visitors register (VLR, Visitor Location Register) are able to serve users of a GSM mobile radio network that are within range radio controlled by them. Basically performs switching functions required to establish, control, tax the mobile recharge api calls to and from a terminal present in your area. This area is defined by the BSS controlled MSC.
A terminal as it moves within the GSM network can change continuously recharge price BTS performing the procedure known as handover. An MSC is delegated to the switching of calls to a number of BSS (controlled by it) in such a way as to mask the mobility of users within the area served by it. In mobile recharge api VLR are maintained information of the users who are currently under the control of the MSC to which the VLR belongs.
