U E D R , A S I H C RSS

Data Communication Summary Project/Chapter8

1. The Air Link

  • 고객과 . .
  • 게 MSU() 게 BTS(Base Transceiver Station) .

1.1. Subscriber Unit

  • . (MS mobile station)

1.2. Base Stations

  • Base Transceiver Stations (BTS)
  • .
  • .
  • fiberoptic .
  • BTS 게 꾸 .

2. Voice Infrastructure

2.1. Station Controllers

  • BTS BSC(Base Station Controller) .
  • 꾸기 BTS BSC .
  • Base Station BSC .
  • BSC BTS .

2.2. Switching Centers

  • moblie voice MSC(Mobile Switching Center).
  • , MSC .
  • MSC 고, MSC .
  • 고객 MSC .

  • 각각 MSC .( 과, )

2.2.1. The Home Location Register(HLR)

  • MSC .
  • .
  • , 그 MSC .

2.2.2. The Visitors' Location Register(VLR)

  • MSC .
  • MSC 게 call home HLR VLR 고, .
  • call home HLR . 국 .
    • MAP(Mobile Application Part)고, HLR과 VLR .

2.2.3. The Equipment Identity Register(EIR)

  • .
  • 고, .

2.2.4. The Authentication Center(AuC)

  • .
  • 각각 .
  • HLR과 VLR .
  • 2G 3G 과 PMR(Private Mobile Radio) .

2.2.5. The Messaging Center

  • SMS 고, .

2.3. Trunking

  • MSC , . 그 TSCs(Trunking Switching Centers) .
  • TSCs MSC .
  • TSC .

2.4. GateWays

  • The Gateway Mobile Switching Center (GMSC) .
  • (PSTN) roaming .
  • Signaling System 7(SS7) .

3. Data Infrastructure

  • BST BSC .
  • circuit .

3.1. Packet Control

  • GPRS Packet Control Unit(PCU). base station .
  • PCU . 그 .

3.2. Serving Support

  • Serving GPRS Support Node (SGSN) data infrastructure MSC .
  • MSC ( 고, 거..) .
  • MSC 각각 .
  • PCU 게 SGSN .
  • SGSN 고객 .

3.3. The GPRS Backbone

  • SGSN , . GPRS Backbone .
  • GPRS Backbone MSC .
  • IP GTP(GPRS Tunneling Protocol) .

3.4. The Gateway Node

  • GPRS . 그 .
  • Gateway GPRS Support Node(GGSN) GTP TCP/IP . .
  • GGSN 게 GPRS .
  • X.25 .
  • ATM .

3.5. Optional GPRS Infrastructure

  • The Point-to-Multipoint Service Center(PTM SC), Qos . 고객 . 그 .( .)
  • The Border Gateway(BG), roaming . .
  • The GPRS Charging Gateway(GCG), .
  • The Lawful Interception Gateway(LIG), GPRS .

3.6. GPRS Roaming

  • GPRS roaming GPRS , 그 .
  • , GPRS roaming .
    • Internet Roaming : . 고, 간 , .
    • GRX Roaming : GPRS Roaming Exchange(GRX) 공급 . GPRS GTP .

3.7. Wired Access Points

  • Richchet MCDN cellular . 그 고, 그 BTS .
  • BTS WAP(wired access points , ..).
  • , 4 .

4. Server-Side Equipment

  • 고객 .

4.1. Wap Gateways and Servers

  • WAP , WAP gateway 거기 . . WAP WAP gateway .
  • WAP gateways WAP servers( WAP ) WAP WAP .

4.2. Unbundling and Virtual Networks

  • , .

4.3. Mobile E-Mail Gateways

  • .
  • IMAP(Internet Message Access Protocol) : .
  • POP(Post Office Protocol) : .
  • POP IMAP . gateway server( ) .
  • Gateway . 개 PC 고, 그경 ISP . .

5. The Internet

5.1. Internet Protocol Version 4

  • 32 bit ( 4 개 byte)

5.2. The IP Address Shortage

  • IP GSM GPRS 기.

5.3. Mobile IP

  • IP 고 그 . 그 Mobile IP standard .
  • tunneling , IP IP .
  • .
  • , 고, 고, IP .

5.4. Internet Protocol Version 6

  • 16 byte (128)
  • .

5.5. Voice Over IP

  • .
  • IP .
  • .
  • Robust Header Compression(ROHC) . - 3 .

6. Summary

  • 고 고 . ...()
  • MSC - - . GPRS SGSN - - .
  • WAP 게 고객 금 그 . WAP .
  • WAP . WAP .
  • IP - 공급 ? - .
  • 3G 금 그 , IPv4 IPv6 .
  • 3G 궁극 , . .(?)

Valid XHTML 1.0! Valid CSS! powered by MoniWiki
last modified 2021-02-07 05:23:05
Processing time 0.0441 sec