Cellular networks khoury college of computer sciences. Gsm subsystems network subsystem hlr connects and interacts with a number of other components on the system the gateway msc for handling incoming calls the vlr for handling request from mobile phones to attach to the network the smsc for handling incoming sms the voice system for delivering notification to the. Geographical structures in a mobile communication network gsm is a worldwide standard for mobile communication with an extensive coverage. Optional to use the same password to access the extender network that you use for your network, click the copy password button. Network switching subsystem nss network management subsystem nms the three subsystems, different network elements, and their respective tasks are presented in the following.
Enter the passphrase for your wireless network and click continue. Describe the functionality of lan, man, and wan networks. Jan 01, 2011 the gsm network is divided into two systems. An omc is a computerized monitoring center which is connected to other network components such as mscs and bscs via x. Gsm network architecture, channelisation, signalling and call processing dr bhaskar ramamurthi professor department of electrical engineering iit madras.
Gsm network architecture, channelisation, signalling and. Due to the mobility of the subscribers, the organisational structure must be subdivided into different processing elements. Switching system ss base station system bss in addition, as with all telecommunications networks, gsm networks are operated, maintained and managed from computerized centers. Weve included an easy reference resource guide and faqs to get you started. A minimum of at least 2 computers cables that connect the computers to each other, although wireless communication is becoming more common see advice sheet 20 for more information a network interface device on each computer this is called a network. Description of the lan topologydescription of the wan topologydescription of the network connectors such as routers, bridges.
Download it once and read it on your kindle device, pc, phones or tablets. It has an open, distributed architecture the separation of switching and service control functions full use of ss7 as the signaling infrastructure its clearly defined and specified interfaces the nature of its in structure. Qos can be characterized, by such factors as contiguity of coverage, accessibility of the network, speech. The structure of a gsm network relies on several functional entities, which have been specified in terms of functions and interfaces. May 21, 2008 networks have a number of components that all need to be up and running for the network to be operational. Camel customised applications for mobile network enhanced logic is a set of in intelligent network type functions and procedures that make operatorspecific in services available to subscribers who roam outside their home network. The ngn functional architecture described in this reference. Gsm computer network telecommunications standards free. The msc is responsible for toll ticketing, network interfacing, common channel signaling.
Geographical locations of the different components or subnets involved in the network. Sep 05, 2010 teracom videotutorial dvd6 tco cwa l42. A network can be defined as a group of computers and other devices connected in some ways so as to be able to exchange data. Some of these elements overlap with those of wired networks, but special consideration is necessary for all of these components when deploying a wireless network. Page 12 n300re wifi range extender when this happens, your computer is automatically disconnected from the extender wifi network. Wireless course call routing in wireline network location of exchange port corresponding to. Network areas the cell is the area given radio coverage by one base transceiver station. The nodes typically handle the network protocols and provide switching capabilities. Networking hardware, also known as network equipment or computer networking devices, are. Components of a network a computer network comprises the following components. Visitor location register vlr a database which stores temporary information about roaming gsm subscribers. The gsm network is called public land mobile network plmn.
The gsm network identifies each cell via the cell global identity cgi number assigned to each cell. Contents at a glance introduction xxv chapter 1 computer network fundamentals 2 chapter 2 the osi reference model 28 chapter 3 network components 60 chapter 4 ethernet technology 112 chapter 5 ipv4 and ipv6 addresses 148 chapter 6 routing ip packets 198 chapter 7 widearea networks 230 chapter 8 wireless lans 266 chapter 9 network optimization 296 chapter 10. Network layerprovides the same functionality as the physical, the data link and network layers in the osi model. Gsm frequencies gsm systems use radio frequencies between 890915 mhz to receive and between 935960 mhz to transmit rf carriers are spaced every 200 khz 8 users, allowing a total of 124 carriers to use an rf carrier is a pair of radio frequencies, one used in each direction transmit and receive frequencies are always separated by 45. The main new entities required within the network are the sgsn and ggsn, and these are required as the starting point. Gsm network areas the gsm network is made up of geographic areas. This blog post describes a basic global system for mobile communications gsm network and role of each component within its core network. Peer network outside the family, there is a community that offers a wider array of resources than the typical family can provide. Operating systems servers physical or virtual client workstations desktop and mobile copp. The core network components are connected to the proximate routers directly through fege fast ethernet gigabit ethernet. Mobile services switching center msc the network element which performs the telephony switching functions of the gsm network.
It involves three main subsystems, each containing functional units and interconnected with the others through a series of standard interfaces. A wireless network consists of quite a few components that support communications using radio or light waves propagating through an air medium. When a hub receives data, it rebroadcasts it to every connected device, computers simply ignore data that is not meant for them. Hubs, switches and routers are devices that allow us to create networks and connect those networks to one another. Cons reference point is described as a part of this ncs document idl file is under idlcons directory.
Contents at a glance introduction 1 chapter 1 introduction to networking 9 chapter 2 osi and tcpip models and network protocols 43 chapter 3 addressing and routing 93 chapter 4 components and devices 5. Gsm often described as a true intelligence network, gsm is called the first true wireless network because. Introduction in a fiercely competitive environment, a good quality of service qos is a competitive advantage for a service provider. In the case of products of safety class i with movable power cord and connector, operation is permitted only on sockets with a protective conductor contact and protective conductor. Gsm network interfaces list a series of different interface definitions were written and each given names as seen below. A disadventage can be that it has implications for network performance because a lot of bandwidth is wasted on sending unneccesery data over the network to computers. Network switching subsystem nss network management subsystem nms the three subsystems, different network elements, and their respective tasks are. Packets dropped by an inbound access list are not forwarded to the nam. May 12, 2015 network classification by their component rule.
It is used to control and monitor the overall gsm network and it is also used to control the traffic load of the bss. Introduction to computer networking docdeveloppementdurable. Base transceiver station bts the network element which handles the radio interface to the mobile station. Some of these elements overlap with those of wired networks, but special consideration is necessary for all of these components when deploying a.
Networks have a number of components that all need to be up and running for the network to be operational. Packets that are dropped by the cisco ios because of errors. It is a central connection point for several network devices. This technology was invented by bob metcalfe and d. Such competitive local carriers may also lease specific network elements from the incumbent see figure 5. In this paper we focus on the concept of software defined for mobile network control sdmc network. The specification of the network topology diagram requires the definition of the characteristics and entities underlying the network. Data communication and computer network 8 let us go through various lan technologies in brief.
Scribd is the worlds largest social reading and publishing site. Get certified get ahead a get certified get ahead kindle short kindle edition by gibson, darril. Gsm is a mobile phone standard developed by the european telecommunications standards institute etsi for secondgeneration 2g digital cellular networks. We are interested in your contributions to constructive innovation. The ohio state university raj jain 1b layering protocols of each layer have to perform a set of functions all alternatives for a row have the same interfaces choice of protocols at each layer is independent of those of at other layers. Due to the mobility of the subscribers, the organisational structure must be. The core network components are then interconnected through the ip bearer network composed of the routers. Network access process function packet transport function media resource processing function t1 t3 t20 t7 t4 ls function user profile db function registration function t6 t8 9 t t12 t 11 t15 t1618 s1 s4 s9 s10 s11 s12 s s17 s. The mobile station ms the base station subsystem bss the network switching subsystem nss the operation support subsystem oss given below is a simple pictorial view of the gsm architecture.
Each of these systems are comprised of a number of functional units which are individual components of the mobile network. The main one is the addition of the pcu described above. Gsm cellular networks pdf book free ebook download as pdf file. Introduction a computer network is made of two distinct subsets of componentsdistributed applications are programs running on interconnected computers. The purpose of oss is to offer the customer costeffective support for centralized, regional, and local operational and maintenance activities that are required for a gsm network. Computer networks share common devices, functions, and features including servers, clients, transmission media, shared data, shared printers and other. The additional components of the gsm architecture comprise of databases and messaging systems functions. Computer networks components comprise both physical parts as well as the software required for installing computer networks, both at. Packets dropped by an outbound access list are forwarded to the nam for analysis.
As shown in figure 3, these areas include cells, location areas las, mscvlr service areas, and public land mobile network plmn areas. Each function is defined and specified as a set of functional entities outlined in sections 3 and 4 of this specification. If a different voltage is to be set, the power fuse of the product may have to be changed accordingly. By convention, switching devices acting at the lan layer and forwarding packets based on the lan address are called switches or, originally. Today, gsm is widely used around the world, having a market share of. Given below is a simple pictorial view of the gsm architecture.
Network subsystem ns provides link between cellular network and pstns controls handoffs between cells in different bsss authenticates users and validates accounts enables worldwide roaming of mobile users central element of ns is the mobile switching center msc. Network analysis module nm nam the network analysis module nm nam feature is a network module that monitors and analyzes network traffic for a system using extended remote monitoring rmon standards, rmon2, and other management information bases mibs. The bts is the radio equipment transceivers and antennas needed to service each cell in the network. A node is usually itself a computer general or special which runs specific network software.
Components of a computer network purdue computer science. Introduction a computer network is made of two distinct subsets of components distributed applications are programs running on interconnected computers. Um interface the air or radio interface standard that is used for exchanges between a mobile me and a base station bts bsc. Please take time to familiarize yourself with all aspects of the network manual. An important function of oss is to provide a network overview and support the. Network which uses shared media has high probability of. Customers of the incumbent telephone carrier make calls to their dialup internet service provider, which in turn is a customer of a. Cs 536 park introduction what is a computer network. Introducing basic network concepts 1 basetech networking concepts team 2230894 blind folio 1 a network connects members of a family. The oss or operation support subsystem is an element within the overall gsm mobile communications network architecture that is connected to components of the nss and the bsc. Mapping between ip addresses and network physical addresses. In the omc, staff are presented with information about the status of the network and can monitor and control a variety of system parameters.
These functions and interfaces are explained in this chapter. Qos can be characterized, by such factors as contiguity of coverage, accessibility of the network, speech quality and number of dropped calls. Contents at a glance introduction 1 chapter 1 introduction to networking 9 chapter 2 osi and tcpip models and network protocols 43 chapter 3 addressing and routing 93 chapter 4 components and devices 5 chapter 5 installation and configuration 167 chapter 6 cabling and wiring 209 chapter 7 wireless 259 chapter 8 network management 303 chapter 9 network optimization 381. Ethernet ethernet is a widely deployed lan technology.
519 365 1131 1436 768 550 690 1466 183 578 394 1031 661 1375 219 211 816 628 1059 230 216 360 1248 1466 269 958 1320 940 1268 824 618 1473 1290 1437 938 416 151 1294 1136 86 1113 1038 332