U E D R , A S I H C RSS

Data Communication Summary Project/Chapter8

1. The Air Link

  • ณ ฐ „คํŠธ›Œํฌ˜ งˆ€ง‰ —ฐฒฐด‹ค. ฒ ดŠค Šคํ…Œด…˜€ —–ด งํฌ ฒ”œ„— ํฌํ•จ˜€ •ŠŠ”‹ค.
  • —–ด งํฌ€ ™ž‘ํ•˜ธฐ œ„ํ•ด„œŠ” ‘€€ ˆ˜‹ ธฐ€ ํ•„š”ํ•œฐ ‚ฌšฉž— ˜ํ•ด„œ ž‘™ํ•˜Š”ฒŒ MSU(ํ•ธ“œํฐ) šด˜ž— ˜ํ•ด„œ ™ž‘ํ•˜Š”ฒŒ BTS(Base Transceiver Station) ด‹ค.

1.1. Subscriber Unit

  • ํ•ธ“œํฐ„ งํ•œ‹ค. (MS mobile station)

1.2. Base Stations

  • Base Transceiver Stations (BTS)
  • ชจ“  …€˜ €šดฐ— žˆŠ” Œ€ํ•œ ˆ˜‹ ธฐ ด‹ค.
  • €ฉด— žฅ• — ฐฉํ•ด ฐ›€ •Šธฐ œ„ํ•ด„œ †’€ œ„˜— žˆ–ด• ํ•œ‹ค.
  • —…งํฌ œ„ํ•ด„œ fiberoptic„ งŽด “ด‹ค.
  • BTS€ ํ˜˜ค„„ œํ‚คธฐ •Œฌธ— € –ดšธฆฌฒŒ พธ„€งŒ „ˆฌด ํ‹ฐ€ •ˆ‚˜ฉด ‚ฌžŒ“คด •ˆ „— ฌด‹ฌํ•ด ธ„œ œ„ํ—˜ํ•ดงˆ ˆ˜„ žˆ‹ค.

2. Voice Infrastructure

2.1. Station Controllers

  • ””€„ธ ํ•ธ“œํฐ˜ ฒซฒˆงธ ‹จ„Š” BTS BSC(Base Station Controller)— —ฐฒฐํ•˜Š” ฒƒด‹ค.
  • •„‚ กœทธ „คํŠธ›ŒํฌŠ” •„‚ กœทธ  „ํŒŒ ””€„ „ํŒŒกœ ฐ”พธธฐ œ„ํ•ด„œ BTS— BSC€ ํ•„š”ํ•˜‹ค.
  • —ฌŸฌฐœ˜ Base Stationด BSC ฐ™ด ‚ฌšฉํ•œ‹ค.
  • BSC€ —ฐฒฐ˜–ด žˆŠ” BTS“ค—ฒŒ ™ œกœ ŠคํŽ™ํŠธŸ„ ํ• ‹ํ•  ˆ˜ žˆธฐ •Œฌธ— ํ•˜‚˜˜ …€— ”งŽ€ ‚ฌšฉž ˆ˜šฉํ•  ˆ˜ žˆ‹ค.

2.2. Switching Centers

  • moblie voice „คํŠธ›Œํฌ—„œ €žฅ ณตžกํ•œ ตฌ„š”†ŒŠ” MSC(Mobile Switching Center)ด‹ค.
  •  „ํ™”ธฐ˜ ตํ™˜ธฐ ฒ˜Ÿ, MSCŠ” ‚ฌšฉž“ค„ ธฐ–ตํ•˜ณ  žˆ‹ค€ ํ•„š”ํ• •Œ €ฅธ‹ค.
  • „คํŠธ›ŒํฌŠ” งŽ€ MSC €€ณ  žˆณ , ํ•˜‚˜˜ MSCŠ” —ฌŸฌ ฌดฆฌ˜ …€“ค„ งกณ  žˆ‹ค.
  • ชจ“  ณ ฐ€ ํŠ •ํ•œ MSC— “ก˜–ด žˆ‹ค.
  • ‚ฌšฉž™€ —ฐฒฐํ•˜ธฐ œ„ํ•ด„œ „คํŠธ›Œํฌ—„œ ค‘š”ํ•˜‹ค
  • ฐฐ˜ MSCŠ” •„ž˜™€ ฐ™€ —ฌŸฌฐœ˜ ฐดํ„ฒ ดŠค™€ —ฐฒฐ˜–ด žˆ‹ค.(‚ฌšฉž˜ œ„˜ ถ” , š”ธˆ €ถˆ  •ณด“„ œ„ํ•ด„œ)

2.2.1. The Home Location Register(HLR)

  • MSC—  €žฅ˜–ด žˆŠ” ชจ“  ํ•ธ“œํฐ˜ œ„˜ €€ณ  žˆ‹ค.
  • ž‹ ด ํฌ„ํ•˜Š” ฒ”œ„‚ด˜ ‚ฌšฉž— Œ€ํ•ด„œงŒ  •ํ™•ํ•œ €ฆฌ ธ  •ณด €€ณ  žˆ‹ค.
  • งŒ•ฝ ‚ฌšฉž€ ฒ”œ„ ฐ–œกœ ด™ํ•˜ฉด, ทธ ด™ํ•œ ณณ˜ MSC „„ ฒˆํ˜ธ Œ€‹   €žฅํ•œ‹ค.

2.2.2. The Visitors' Location Register(VLR)

  • MSC€ ํฌ„ํ•˜Š” ฒ”œ„‚ด˜ ชจ“  ํ•ธ“œํฐ˜ €ฆฌ ธ œ„˜ ž„‹œ œกœ  €žฅํ•œ‹ค.
  • MSC€ ํฌ„ํ•˜Š” œ„˜•ˆ— žˆŠ” ‚ฌšฉž—ฒŒ call š”ฒญด ˜คฉด ‚ฌšฉž˜ home HLR€ ƒˆกœšด …€˜ VLR—  ‘ด‰ํ•˜ณ , ‚ฌšฉž— —ฐฒฐ˜ฒŒ ํ•ด€‹ค.
  • ด ‹œŠคํ…œ˜ ฌธ œŠ” ชจ“  callด ‚ฌšฉž˜ home HLR„ ํ†ตํ•ด„œ —ฐฒฐœ‹คŠ” ฒƒด‹ค. ตญ œ œกœ —ฐฒฐ˜ฉด „šฉด งŽด “คฒŒ œ‹ค.
    • ทธž˜„œ งŽ€ „คํŠธ›Œํฌ“ค€ ํ˜„žฌ MAP(Mobile Application Part)ณ , HLR VLR„ ˜คง ํ•œฒˆงŒ ฐพ•„ด„œ €Šฅํ•˜ฉด €—ญ•ˆ—„œ —ฐฒฐ˜ฒŒ ํ•˜Š” ƒˆกœšด ‹œŠคํ…œ„ ตฌํ˜„ํ•˜ณ  žˆ‹ค.

2.2.3. The Equipment Identity Register(EIR)

  •  „ํ™” ฒˆํ˜ธž‘ —ฐ„ํ•˜—ฌ„œ ํ•ธ“œํฐ„ ตฌ„ํ•˜ธฐ œ„ํ•ด„œ ‚ฌšฉ˜Š” ณ œ ˜ ฒˆํ˜ธ €€ณ  žˆ‹ค.
  •  „ํ™”š”ธˆด  •ํ™•ํ•˜ฒŒ งคฒจ€ฒŒ ํ•˜ณ , „‚œ‹ํ•œ ํ•ธ“œํฐ˜  •ณด“„ €€ณ  žˆ–ด„œ „‚œ‹ํ•œ‚ฌšฉชปํ•˜ฒŒ ํ•˜„ก ํ•œ‹ค.

2.2.4. The Authentication Center(AuC)

  • ””€„„คํŠธ›Œํฌ—„œงŒ กดžฌํ•œ‹ค.
  • ดฒƒ€ „คํŠธ›Œํฌ—„œ ฐฐ˜ ํฐ— Œ€ํ•ด„œ ทธ ํ•ธ“œํฐ—„ žˆŠ” ณด•ˆ ธฆ ฝ”“œ˜ ณต‚ฌณธ„ €€ณ  žˆ‹ค.
  • ”  ฅธ ฒ˜ฆฌ œ„ํ•ด„œ HLR VLR—„ ธฆ ฝ”“œ€ •Œ•Œกœ ณต‚ฌ˜ธฐ„ ํ•˜€งŒ ทธฒƒ“ค€ ฒฐฝ” ณตค‘„ ํ†ตํ•ด„œ  „‹ฌ ˜€Š” •ŠŠ”‹ค.
  • 2G ํ•ธ“œํฐ€ ํ•ธ“œํฐงŒ €ฆ ํ•˜€งŒ 3G ํฐ PMR(Private Mobile Radio)Š” „คํŠธ›Œํฌ„ €ฆํ•œ‹ค.

2.2.5. The Messaging Center

  • SMS ฉ”‹œ€ ‹คฃจณ , ํ•ธ“œํฐœกœ “ค–ด˜ค€ ‚˜€Š” ฉ”‹œ€ šฐํŒ…ํ•ด€‹ค.

2.3. Trunking

  • ดˆธฐ ํ•ธ“œํฐ „คํŠธ›Œํฌ—„œ MSC€ ทธงฒ˜Ÿ ˜—ˆŠ”ฐ, ดณง  œ–ดํ•˜ธฐ ํž˜“คฒŒ ˜—ˆ‹ค. ทธž˜„œ TSCs(Trunking Switching Centers)€ ”Œ—ฌ€ฒŒ ˜—ˆ‹ค.
  • TSCsŠ” ‹จ€ —ฌŸฌ MSC“คกœ€„˜คŠ” —ฐฒฐ“ค˜ ง‘ํ•ฉ„ งคšฐ †’€ šฉŸ‰˜ €ดธ”“ค ํ•ฉœฒƒ ฟด‹ค.
  • TSCŠ” „คํŠธ›Œํฌ—„œ ณดํ†ต งคšฐ  ‚˜ •Œ•ŒกœŠ” ํ•˜‚˜งŒ ‚ฌšฉ˜€ธฐ„ ํ•œ‹ค.

2.4. GateWays

  • The Gateway Mobile Switching Center (GMSC)Š” Šคœ„ฒด„˜ ตœ ƒœ„— žˆ‹ค.
  • ทธฒƒ€ ชจฐ” „คํŠธ›Œํฌ  „ํ™” „คํŠธ›Œํฌ(PSTN)‚˜ ‹คฅธ roaming ํ˜‘•ฝ„ งต€ šด˜ž™€ —ฐฒฐํ•œ‹ค.
  • ดฒƒ€ €žฅํฐ —ญํ• € ํ•ธ“œํฐ ‹œŠคํ…œ žฒด˜ ‹ ํ˜ธ ํ”„กœํ† ฝœ„ ณดํ†ต  „ํ™”„ —„œ  „ํ™”ฒˆํ˜ธ™€ ฐ™€  •ณด ‚˜ฅดŠ”ฐ ‚ฌšฉํ•˜Š” Signaling System 7(SS7)กœ €ํ™˜ํ•˜Š” ฒƒด‹ค.

3. Data Infrastructure

  • ชจฐ” ฐดํ„„ BST‚˜ BSC™€ ฐ™ด Œ„ ฐดํ„™€ „Šทํ•œ กฐง ฒด„ ‚ฌšฉํ•œ‹ค.
  •  „ํ™”ธฐ Šคํƒ€˜ €† ธ circuit Šคœ„˜ Œ€‹ — ž‘€ ํŒจํ‚ทœกœ ฐดํ„ ณด‚ดŠ” ธํ„„Šคํƒ€˜ šฐํ„€ ํ•„š”ํ•˜‹ค.

3.1. Packet Control

  • GPRS „คํŠธ›Œํฌ—„œ €žฅ „‹ €„ด Packet Control Unit(PCU)ด‹ค. base station€ ํŒจํ‚ท ฐดํ„ œ„ํ•ด„œ ดฒŒ žˆ–ด• ํ•œ‹ค.
  • PCUŠ” ฐดํ„€ Œ„ „คํŠธ›Œํฌกœ€„ถœฐœํ•˜Š” € ด‹ค. ทธž˜„œ ทธ € € Œ€ธฐ ‹œ„ด‚˜ šฉŸ‰— งŽ€ ˜ํ–ฅ„ œ‹ค.

3.2. Serving Support

  • Serving GPRS Support Node (SGSN)€ data infrastructure —„œ MSC™€ „Šทํ•œ ฒƒด‹ค.
  • MSCฒ˜Ÿ ดฒƒ€ ‹ค–‘ํ•œ ฐดํ„ฒ ดŠค(œ„˜ ฐพณ , ธฆ ํ•˜Š”ฐ..)— —ฐฒฐ˜–ด žˆ‹ค.
  • MSC™€Š” ‹คฅดฒŒ „œ„Šค  œณตํ•˜Š” ฐฐ˜ …€— ง ‘ —ฐฒฐ  ํ•„š”Š” —†‹ค.
  • PCU™€Š” ‹คฅดฒŒ SGSN„ „คํŠธ›Œํฌ— —ฐฒฐํ•˜Š”ฐ ช…ํ™•ํ•œ ธฐ€ด  •˜ ˜–ด žˆ–ด„œ šด˜ž€  œกฐ—…ž งˆŒŒ€กœ ณ  ˆ˜ žˆ‹ค.
  • SGSN˜ œ ํ˜•€ šด˜ž€ ํƒ€ฒŸœกœ ‚Š” ณ ฐด –ด–ค ข…ฅ˜ธ€— ”ฐ„œ „ํƒ ฒƒด‹ค.

3.3. The GPRS Backbone

  • Œ€€„˜ šด˜ž“ค€ ทธ“คด „œ„Šค  œณตํ•˜Š” ˜—ญ•ˆ— SGSN“ค„ „˜ํ•˜—ฌ,  ฐจ Œ€ํ•œ ฐดํ„„คํŠธ›Œํฌ งŒ“ค „ํš„ ํ•œ‹ค. ดฒƒด GPRS Backbone ดณ  •Œ ค ธ žˆ‹ค.
  • GPRS Backboneด MSC™€ €žฅ ‹คฅธ  € ฐดํ„— ”  ํ•ฉํ•œ ํŒจํ‚ท Šคœ„ฐฉ‹„ „ํƒํ–ˆ‹คŠ”  ด‹ค.
  • ธํ„„—„œ ‚ฌšฉ˜Š” IP™€ „Šทํ•œ GTP(GPRS Tunneling Protocol)Š” ํ”„กœํ† ฝœ„ ‚ฌšฉํ•œ‹ค.

3.4. The Gateway Node

  • GPRSŠ” ฐดํ„„คํŠธ›Œํฌ ฐ–—  ‘ ํ•  ˆ˜ žˆ„ก „„˜–ด žˆ‹ค. ทธ ‡ฒŒ ํ•˜ธฐ œ„ํ•ด„œŠ” ‹คฅธ žฅ˜€ ํ•„š”ํ•˜‹ค.
  • Gateway GPRS Support Node(GGSN)Š” GTP ฐดํ„ฐ ํŒจํ‚ท„ TCP/IPกœ ตํ™˜ ํ•˜‚˜ ทธ —ญœกœ ตํ™˜ํ•  ˆ˜ žˆ‹ค. ธํ„„— Œ€ํ•œ ธํ„ฐํŽ˜ดŠค€ ˜Š” ฒƒด‹ค.
  • GGSN€ ธํ„„—ฒŒ GPRS˜ ณตžกํ•ฉ„ ฐถ˜‹ค.
  • X.25„ €›ํ•œ‹ค.
  • ATM— Œ€ํ•œ —ฐฒฐ€ €›ํ•˜€ •ŠŠ”‹ค.

3.5. Optional GPRS Infrastructure

  • The Point-to-Multipoint Service Center(PTM SC), Qos ฌธ œ ‹คฃจŠ” „œ„ด‹ค. ˆ„ ” งŽด ‚ธ ณ ฐ—ฒŒ ํ†ต‹ —„œ šฐ„ ถŒ„ €‹ค. ทธฆฌณ  †Œฆฌ™€ ทธ ฐ™ด ฐดํ„˜ ข…ฅ˜— ”ฐ šฐ„ ถŒ„ ‹ฌฆฌ €‹ค.(†Œฆฌ€ ” †„— ฐํ•˜‹ค.)
  • The Border Gateway(BG), roaming„ ‹คฃฌ‹ค. ดฒƒ€ กœ ํ•„„ง„ ํ†ตํ•ด„œ ›ํ•˜€ •ŠŠ” —ฐฒฐ„ ง‰Š” ฐฉํ™”ฒฝ— —ฐฒฐ˜–ด žˆ‹ค.
  • The GPRS Charging Gateway(GCG), š”ธˆ €ถˆ ˜ต…˜„  „ฌธ œกœ ํ•˜ธฐ œ„ํ•ด„œ ํ•„š”ํ•˜‹ค.
  • The Lawful Interception Gateway(LIG), ‹ตญด GPRS „คํŠธ›Œํฌ— žˆŠ” ด™ ฐดํ„ ค‘„—„œ —ฟณดŠ”ฒƒ„ ํ—ˆฝํ•œ‹ค.

3.6. GPRS Roaming

  • ‹คฅธ šด˜ž˜ GPRS „คํŠธ›Œํฌ—„œ roaming ํ•˜Š” GPRS €ž…ž€Š” —ฌ „ํžˆ ธํ„„—Š”  ‘ํ•  ˆ˜ žˆ„€„, ทธ“คด ˜กดํ•˜ณ  žˆŠ” ‹คฅธ „œ„ŠคŠ” ชปฐ›Š”‹ค.
  • ‚ฌšฉž€ ดŸฌํ•œ ํŠํ™”œ „œ„Šค—  ‘ํ•  ˆ˜ žˆ„ก ํ•˜ธฐ œ„ํ•ด„œŠ”, šด˜ž€ ํŠ„ํ•œ ํ˜•ํƒœ˜ GPRS roaming„ ตฌํ˜„ํ•  ํ•„š”€ žˆ‹ค.
    • Internet Roaming : ‹จˆœํžˆ ธํ„„„ ํ†ตํ•ด„œ ํŠํ™”œ „œ„Šค œ„ํ•œ —ฐฒฐ„ ณด‚ธ‹ค. ดฒƒ€ ‹ธณ , „‹จํ•œ ํ•ดฒฐ…ด€งŒ, Šฆฌณ  ณด•ˆ ฌธ œ€ žˆ‹ค.
    • GRX Roaming : GPRS Roaming Exchange(GRX) ณ  ถˆฆฌšฐŠ” ƒˆกœšด ํ˜•ํƒœ˜ „œ„Šค ณตธ‰ž ‚ฌšฉํ•œ‹ค. ดฒƒ€ ‹ค–‘ํ•œ GPRS „คํŠธ›Œํฌ—„œ GTP ํŠธž˜ํ”ฝ„ šดฐ˜ํ•œ‹ค. ” „‹ธ‹ค

3.7. Wired Access Points

  • Richchet— ˜ํ•ด ‚ฌšฉœ MCDN ‹œŠคํ…œ€  „ํ†ต ธ cellular „คํŠธ›Œํฌ ตฌกฐ™€Š” ‹ค†Œ ‹คฅธ ตฌกฐ— ธฐดˆํ•ด žˆ‹ค. ทธฒƒ˜ ํฌธฐŠ” งคšฐ ž‘ณ , ทธฒƒ“ค€ ฆด ˆด ํ˜•‹œกœ Œ€ํ•œ BTS— ‹ ํ˜ธ“ค„ ณด‚ธ‹ค.
  • Œ€ํ•œ BTSŠ” WAP(wired access points , ํ˜ž€ ŠคŸฝฒŒ„..)ณ  ถˆฆฐ‹ค.
  • งํ–ˆ€งŒ, ด ตฌกฐŠ” 4„Œ€ ‹œŠคํ…œ—„œ งŽด  œ•ˆœ ฒƒ „Šทํ•œ‹ค.

4. Server-Side Equipment

  • ˆฒŒ คณ  „คํŠธ›Œํฌ šด˜ž“คด ฒ˜Œ—Š” ž‹ “ค˜ ‚ฌดํŠธกœงŒ ณ ฐ“คด  ‘ํ•˜„ก ธํ„„— Œ€ํ•œ  ‘„  œํ•œ ํ–ˆ€งŒ ‚˜ค‘— €„œŠ” žธฐ“คฆฌ ฒฝŸํ•˜”‹ˆงŒ ธํ„„— Œ€ํ•œ  ‘  œํ•œ„ ํ’€—ˆ‹ค.

4.1. Wap Gateways and Servers

  • šด˜ž ž‹ ˜ WAP „œ„Šค—  ‘†ํ•˜Š” Œ€‹ —, ‚ฌšฉž€ WAP gateway ํ˜ธถœํ•ด„œ ธฐ— ง ‘  ‘ํ•œ‹ค. ดฒƒ˜ ฌธ œŠ” š”ฒญ— Œ€ํ•œ š”ธˆด‹ค. šด˜ž˜ WAP „œ„Šค€ ‹ฐ „ํ•ด„œ WAP gateway—  ‘†ํ•˜Š”ฐ—Š” Œ„ „ํ™”™€ ฐ™€ „šฉด “ ‹ค.
  • WAP gatewaysŠ” WAP servers(ชจ“  ํ˜•ํƒœ˜ WAP žฅ„ ปค„ํ•˜Š” ‹จ–ด)™€ ํ˜ˆ˜ธฐ ‰ฌšดฐ WAP „œ„Š” ‹จˆœํžˆ ธํ„„†Œ €€ณ  žˆŠ” ปดํ“จํ„กœ WAP ฐดํ„€  œณตํ•˜Š” ฒƒด‹ค.

4.2. Unbundling and Virtual Networks

  • ž‹ ˜ „คํŠธ›Œํฌ ฒฝŸ‚ฌ™€ ฐ™ด ณตœ ํ•˜Š” ฒ•ด œ Ÿฝ—„ žˆŠ”ฐ, ด™€ ฐ™€ ฒƒ€ ดœฐฎ€ฐ™‹ค.

4.3. Mobile E-Mail Gateways

  • Œ€€„˜ ดฉ”€ งงธฐ •Œฌธ— ณด‚ดณ  ฐ›ธฐ€ ํŽธํ•˜‹ค.
  • IMAP(Internet Message Access Protocol) : ฉ” ฝ–ด„ „œ„—„œ €›Œ€€ •ŠŠ”‹ค.
  • POP(Post Office Protocol) : ํ•œฒˆ ณธ ดฉ”€ „œ„—„œ €›Œ„‹ค.
  • ‚ด€ ธ ปดํ“จํ„ดฉ” ‹œŠคํ…œ€ POP‚˜ IMAP„ ํ†ตํ•œ ›ฒฉ  ‘„ €›ํ•˜€ •ŠŠ”‹ค. Œ€‹  ด™€ ฐ™€ ฒƒ— Œ€ํ•œ ด™ ํ†ต‹ ˜  ‘„ œ„ํ•œ €žฅ ข‹€ ฐฉฒ•€ ดฉ”งŒ ‹ด‹ํ•˜Š” gateway server(ํ—ˆšฉœ ‹œŠคํ…œ ด™ ํ†ต‹   ‘†ํ•˜ฒŒ ํ•˜Š”)„ ํ†ตํ•ด„œ  ‘ ํ•˜Š” ฒƒด‹ค.
  • Gateway †Œํ”„ํŠธ›จ–ด€ ดฉ” „œ„—„œงŒ Œ•„• ํ•œ‹คŠ” ฒ•€ —†‹ค. ฐœ„ PC—„œ„ Œ•„ €ฒŒ ํ•  ˆ˜ žˆณ , ทธฒฝšฐ žฅ € ISP‚˜ ฒ•ธ „œ„ ‚ฌšฉํ•˜—ฌ –ด–ค ดฉ” ‹œŠคํ…œ„ ฐ™ด ™ž‘ํ•˜ฒŒ งŒ“ค ˆ˜ žˆ‹ค. ‹จ € ํ•ญƒ ปดํ“จํ„ œ †“•„• ํ•œ‹คŠ” ฒƒด‹ค.

5. The Internet

5.1. Internet Protocol Version 4

  • 32 bit ( 4 ฐœ˜ byte)

5.2. The IP Address Shortage

  • IP †Œ˜ ‚ฌšฉŸ‰„ œ„ํ˜‘ํ•˜Š” ฒƒ€ GSMํฐ— €ฐฉ˜–ด žˆŠ” ํ•ญƒ  ‘†˜–ด žˆŠ” GPRS ธฐˆ ด‹ค.
  • ํ•˜—ฌํŠ ทธž˜„œ †Œ€ €ํ•˜‹ค

5.3. Mobile IP

  • ง‘—งŒ žˆ„•ŒŠ” ณ  •œ IP “ฐฉด ˜€งŒ ด™ํ•˜ณ  ฐ–— žˆณ  ทธŸด•ŒŠ” ทธ ‡ฒŒ ํ•˜€ ชปํ•œ‹ค. ทธž˜„œ Mobile IP standard€ ฐœํ‘œ˜—ˆ‹ค.
  • ดฒƒŠ” ‹œŠคํ…œ tunnelingดŠ” ฒƒ„ ดšฉํ•˜Š”ฐ, ดฒƒ€ ‚ฌšฉž€ ž‹ ˜ IP†Œ€ †ํ•œ €—ญด •„‹Œ „คํŠธ›Œํฌ—  ‘†ํ• •Œงˆ‹ค ž„‹œ ธ IP †Œ €€Š”ฒƒ„ ํ•„š”กœ ํ•œ‹ค.
  • ํ™ˆ „คํŠธ›Œํฌ€ ทธ ž„‹œ †Œกœ ํŒจํ‚ท„ šฐํŒ… ํ•œ‹ค.
  • ฆฌ— ”ฐ ‚ฌšฉž˜ ธํ„„‚ฌšฉฃŒ€ €ถˆ˜€ •ŠŠ”‹คŠ” žฅ ด žˆ€งŒ, Œ€—ญํญ„ ‚ญ„ํ•˜ณ , €—ฐ‹œ„ด Š˜–ด‚˜ณ , IP †Œ ‚ญ„ํ•˜Š” ‹จ „ €€ณ  žˆ‹ค.

5.4. Internet Protocol Version 6

  • 16 byte˜ †Œ (128„ํŠธ)
  • •„ง ‹คšฉํ™”Š” •ˆ˜—ˆ‹ค.

5.5. Voice Over IP

  • ฐดํ„™€ Œ„˜ ธฐณธ กฐง„ ‚˜ˆ „œ šด˜ํ•˜ธฐณด‹คŠ” šด˜žŠ” ˜คง ํ•˜‚˜˜ ํ†ตํ•ฉœ „คํŠธ›Œํฌ ํ•„š”กœ ํ•  ฒƒด‹ค.
  • IP ํŒจํ‚ท˜ ณตžก˜ ตฌกฐ•Œฌธ— ดŸฌํ•œ ํ†ตํ•ฉด ฐฉํ•ด˜—ˆ‹ค.
  • Œ„ „””˜คŠ” ” งง€ ํŒจํ‚ท„ ‚ฌšฉํ•˜ธฐ •Œฌธ— ˜ค„ ํ—ค“œ€ „ˆฌด ํฌ‹ค.
  • ทธž˜„œ ‚˜˜จฒƒด ํ—ค” Robust Header Compression(ROHC)ณ  ถˆฆฌšฐŠ” ธฐ€œกœ ••ถ•ํ•˜Š” ฒƒด‹ค. - ํ—ค” —ฌŸฌฒˆ ณด‚ดŠ” Œ€‹ — 3„Œ€ ํฐ€ ํ—ค”Š” ํ•œฒˆงŒ ณด‚ดณ  ‚˜„œ งง€ ฉ”‹œ€ ณด‚ธ‹ค.

6. Summary

  • ชจฐ” „คํŠธ›ŒํฌŠ” ณตžกํ•˜ณ  ณ  •œ ํ† Œ€€ ํ•„š”ํ•˜‹ค.  „ํ™”ง ธํ„„ด „Šทํ•œ...(ํ•ด„ž˜•ˆจ)
  • ณดดŠค „คํŠธ›ŒํฌŠ” MSC“ค -  „ํ™” ตํ™˜ธฐ™€ „Šทํ•œ - กœ€„งŒ“ค–ด„‹ค. GPRS „คํŠธ›ŒํฌŠ” SGSN“ค - ธํ„„šฐํ„™€ „Šทํ•œ - กœ€„งŒ“ค–ด„‹ค.
  • WAP ฒŒดํŠธ›จดŠ” ณ ฐ“คกœ ํ•˜—ฌธˆ ทธ“ค˜  „ํ™”ธฐกœ€„‹คด–กœจ „คํŠธ›Œํฌ— “ค–ดฐˆˆ˜ žˆฒŒ ํ•ด€‹ค. WAP „œ„Š” › „œ„ž‘ „Šทํ•˜‹ค.
  • ˜คํ”ˆ WAP „คํŠธ›ŒํฌŠ” –ดŠ ‚ฌดํŠธ˜  ‘„ ํ—ˆšฉํ•œ‹ค. ํดกœฆˆ“œ WAP „คํŠธ›ŒํฌŠ” ˜คํ ˆดํŠธ™€ ทธ˜ ํŒŒํŠธ„ˆ“ค—ฒŒงŒ  ‘„ ํ—ˆšฉํ•œ‹ค.
  • ธํ„„ „ํ™”ธฐŠ” IP†Œ - ํ˜„žฌ ณตธ‰ด ž˜ •ˆœ‹ค? - € ํ•„š”ํ•˜‹ค.
  • 3Gกœ ํ•˜—ฌธˆ ทธฒƒ˜ ž žฌ ฅ„ ตœณ กœ Œ–ด˜ฌฆฌ คฉด, ธํ„„€ IPv4กœ€„IPv6 šฐํ„กœ ˜ฎฒจ€• ํ•œ‹ค.
  • 3G „คํŠธ›ŒํฌŠ” ถ œกœ ฐดํ„ œ„ํ•ด ํ•˜Š” ฒƒฒ˜Ÿ, ณดดŠค œ„ํ•ด ฐ™€ ํ† Œ€ ‚ฌšฉํ•  ฒƒด‹ค. ธํ„„ท ํ”„กœํ†  œ„— ณดดŠค ‹ฌฆฌฒŒ ํ•ด„œ.(?)

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