Detailed explanation of this structure:
The fourth generation networks of to are from a group of elements divided into two parts of the a, (or short), and it is responsible for the operations of the operations that are connected to radio like, demodulation, scheduling and others. New in the fourth generation that enb (previously named BTS and later her name node b) they are tied to each other directly compared to previous networks there was a device named CLT OR RNC (according to the generation) to link bts and perform some operations
The second part is core and this is bitcoin from a group of devices for each one of them a group of jobs
serving gateway S-GW
- Packet Gateway P-GW
- Mobile Management Entity MME
- Police and charging rule function PCRF
- Home subscriber server HSS
Posts components of the fourth generation networks LTE:
1. MME: it is responsible for signaling in the network and by which it will create or cancel the connections between the network and the user organs. It also identified the area in which the organs of the participants and their her area were located. He is responsible for the process of different networks. And if the mobile device will accept a call, he will be responsible for sending a message named paging to the mall so he knows that there is a phone call that she will accept. And also the part of making sure that the mobile device is responsible and called authentication.
2. Serving Gateway-SGW: this device reaches traffic for enodeb stations and in turn by selling traffic to mobile devices.
3. Packet Gateway - PGW: it is the device that reaches core in other networks like internet or other mobile networks. And also he will be responsible for giving ips to mobile devices. And make traffic to traffic from and to the network (routing). And possible can do traffic to passes on it.
4. PCRF - Policy and Charging Rule: it is responsible for determining and ensuring the quality of service for traffic and also determining how participants account.
5.HSS -Home Subscriber Server: the database of the data storage of subscribers in the network.
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