Question

Briefly describe the main architectural components of a cellular radio system. Identify the primary purpose of each. Identify the two major components and their respective subsystems. Ensure you identify which component interacts with cellular phone and which component interacts with public switched telephone network (PLEASE TYPE NOT WRITE ANSER)

Answer 1

The main components of a cellular radio system. identify the primary purpose of each, identify the two major components and their respective subsystem. ensure you identify which components interact with cellular phone and which components interacts with public switched telephone network --

• The basic components of cellular radio system includes --
• Mobile station standard -- a mobile station is wireless devices that consists of control unit, antenna system and transceiver for data and vioce transmission. for example -- GSM network.
• Air Interface -- the main interface protocols are (TDMA) time division multiple access, (FDMA) frequency division multiple access,and (MAC) medium access control.
• Base station -- Base station is fixed station in cellular system which is used for radio communication with mobile units. they are radio channels, receiver antenna mounted on tower and transmitter.
• Databases -- The database is used to keep track of information for example -- caller location, billing, and subscriber data.
• The main two database is called home location register and visitor location register.
• Security mechanism -- the security mechanism confirm subscriber and allowed access to network and authenticate billing.
• Gateway -- This is communication link between two wireless and wired system. the two components of gateway is -- interworking function and mobile switching center.

The two main components of cellular radio system is -

• Radio interface - that allows user to wander while communicating through radio from mobile station to other components.
• Fixed network -- which is used in public switched telephone network.
• The cellular radio system is classified by the marine, military services and police.
• The main complexity of public cellular radio is control structure that enables the network to know where the mobile station is currently located and track wether it is making call.
• The control machenism is possible because of set of protocols that enables mobile station to register on network, controls radiated power levels, facilitates call set up and clear down switches mobile station between base station as they travel, and provide security system and perform vital functions.
• The support sysetm of users on network is based on "Common air interface" by using this users communicate.
• The capacity of users is dependent on many factors but the main one is amount of spectrum the regulatros allocate and size of radio coverage area from basic station and amount of interference a particular radio link can tolerate.