All IP Cellular Network, 3G and Beyond


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All IP Cellular Network, 3G and Beyond

  1. 1. All IP Cellular Network, 3G and Beyond 연세대학교 김 영용 [email_address] [email_address] ☎ 2123-2861
  2. 2. Trends of Network Evolution 2G 3G Wireless Wireline circuit packet (Voip) ALL IP Network Tremendous Growth in Data Traffic It’s not a choice but an inevitable trend
  3. 3. Advantage of All IP Structure <ul><li>Single network that represents the convergence of multiple independent networks (voice, data, video) into a single unified network </li></ul><ul><li>Operational efficiencies of a single integrated network </li></ul><ul><li>Facilitate new service development and implementation </li></ul><ul><li>Shorten time-to-market for new services </li></ul><ul><li>Seamless deployment of voice services across packet network </li></ul><ul><li>Distributed networking model for scalability, performance, and reliability </li></ul>
  4. 4. 3G Standard Activities <ul><li>3GPP (1) </li></ul><ul><ul><li>Global specifications for GSM/MAP network evolution to </li></ul></ul><ul><ul><li>3G and the UTRA RTT </li></ul></ul><ul><ul><li>Almost Mature Standards </li></ul></ul><ul><li>3GPP2 </li></ul><ul><ul><li>Global specifications for ANSI/TIA/EIA-41 network </li></ul></ul><ul><ul><li>evolution to 3G and global specifications for the RTTs </li></ul></ul><ul><ul><li>supported by ANSI/TIA/EIA-41 </li></ul></ul><ul><ul><li>Standards under development </li></ul></ul>
  5. 5. ALL IP Network 관련연구동향 standardization efforts 3GPP 3GPP2 3G.IP IETF MWIF ARIB/TTC ETSI ANSI/TIA Fusitsu Nokia Erricson BT AT&T NEC Panasonic Mitsubishi Docomo Lucent Nortel Cisco Toshiba Telcordia Hitachi Qualcomm Vodafone Motorola Sprint/PCS
  6. 6. Generic All IP Network Architecture IP Core 1G/2G GW 1G/2G RAN 3G RAN SA RTS WCCA Legacy App Application servers HSS PacketGW Signalling GW 3G RAN GW Trunk GW Other Networks Packet Public Data Network Signalling Network PSTN
  7. 7. Key components of all IP architecture <ul><li>Radio Network </li></ul><ul><li>The Core Packet Network </li></ul><ul><li>The Call Control </li></ul><ul><li>Gateways to mobile systems and to external networks </li></ul><ul><li>The Service architecture </li></ul>
  8. 8. 3GPP <ul><li>3GPP - 3rd Generation Partnership Project </li></ul><ul><li>Development of 3rd generation cellular systems based on GSM architecture </li></ul><ul><ul><li>GSM </li></ul></ul><ul><ul><li>GPRS </li></ul></ul><ul><ul><li>WCDMA </li></ul></ul><ul><ul><li>EDGE </li></ul></ul><ul><li>Supported by several regional standardization bodies : </li></ul><ul><ul><li>ETSI (Europe) </li></ul></ul><ul><ul><li>ARIB, TTC (Japan) </li></ul></ul><ul><ul><li>CWTS (China) </li></ul></ul><ul><ul><li>T1 (U.S.) </li></ul></ul><ul><ul><li>TTA (Korea) </li></ul></ul>
  9. 9. All-IP wireless network discussed in 3GPP : History <ul><li>[July 99] 3GPP All-IP network feasibility study started </li></ul><ul><li>[Sept 99] TSG-S2 R00 AdHoc submitted results of the TSG-S2 for approval </li></ul><ul><li>[Oct 99] After TSG-S2 approval, TSG-S2 R00 AdHoc Group results were submitted to TSG-SA for approval to be the first Spec. </li></ul><ul><li>[Oct 99] After TSG-SA approval, Project planning work for R00 (including All-IP option) was started at TSG-S2 project planning AdHoc groups. </li></ul><ul><li>[Dec 99] After TSG-S2 approval, the detailed workplan for R00 (including All-IP network option) was submitted to TSG-SA for approval. </li></ul><ul><li>[Jan 00 - Dec 00] Work within 3GPP TSGs and WGs proceed according to the TSG-SA approved R00 Project plan. </li></ul><ul><li>[Dec 00] Release 00 specifications completed including All-IP option. </li></ul>
  10. 10. 3GPP All-IP wireless network reference architecture : Option- 1 Option 1 is based on packet technologies and IP telephony for simultaneous real time and non real time services.
  11. 11. 3GPP All-IP wireless network reference architecture : Option- 2 Option 2 is to support of release 99 CS domain terminals. Option 2 also supports the IP based services of option 1.
  12. 12. 3GPP Signaling Protocol Stack
  13. 13. Features of 3GPP All-IP <ul><li>GPRS-based </li></ul><ul><li>Mobility management - GSN+HSS(=HLR) </li></ul><ul><li>Call control - Further study (H.323 and SIP are used as examples) </li></ul><ul><li>Compatibility with existing networks - Support of CS domain GSM terminals </li></ul><ul><li>QoS support - GPRS QoS support scheme even if call control protocols are introduced </li></ul><ul><li>Support of EDGE </li></ul><ul><li>Handover and Roaming - Supported </li></ul><ul><ul><li>Within UMTS R00 IP network </li></ul></ul><ul><ul><li>Between All-IP and CS domain/GSM </li></ul></ul><ul><li>AirLink Optimization for Real-Time IP - Header </li></ul><ul><li>compression/decompression and Header stripping /regeneration for IP/UDP/RTP stack </li></ul><ul><li>Security - For Further study </li></ul>
  14. 14. 3GPP2 <ul><li>3GPP - 3rd Generation Partnership Project 2 </li></ul><ul><li>Development of 3rd generation cellular systems as </li></ul><ul><li>evolution of ANSI/TIA/EIA-41 networks </li></ul><ul><li>Supported by several regional standardization bodies : </li></ul><ul><ul><li>ARIB, TTC (Japan) </li></ul></ul><ul><ul><li>CWTS (China) </li></ul></ul><ul><ul><li>TIA (U.S.) </li></ul></ul><ul><ul><li>TTA (Korea) </li></ul></ul>
  15. 15. 3GPP2 Organization <ul><li>Steering Committee </li></ul><ul><li>Technical Specification Group </li></ul><ul><ul><li>TSG-A (A-Interface System) </li></ul></ul><ul><ul><li>TSG-C (cdma2000) </li></ul></ul><ul><ul><li>TSG-P (Wireless Packet Data Interworking) </li></ul></ul><ul><ul><li>TSG-R (Interface of 3GPP Radio Access Technology to 3G Core Network evolved from ANSI-41) </li></ul></ul><ul><ul><li>TSG-S (Service and System Aspects) </li></ul></ul><ul><ul><li>TSG-N (ANS-41/WIN) </li></ul></ul>
  16. 16. 3GPP2 All-IP wireless network discussed in 3GPP2 <ul><li>[Nov 99] All-IP AdHoc was formed in TSG-S to develop an overview of related objects, requirements, issues, and recommendations by January 2000 TSG-S meeting </li></ul><ul><li>[Dec 99] 1st TSG-S All-IP AdHoc in HI to output initial Recommendations </li></ul><ul><li>[Jan 00] 2nd TSG-S All-IP AdHoc in CA to output conclusions of the adhoc group </li></ul><ul><ul><li>Phase-1 : All-IP Network Reference Model (NRM), Stage 1, 3GPP2 workplan </li></ul></ul><ul><ul><li>Phase-2 : Stage2 and 3 development </li></ul></ul><ul><ul><li>A desire for an all IP network architecture common between 3GPP and 3GPP2 </li></ul></ul><ul><ul><li>Use of the IETF IP protocols whenever possible </li></ul></ul><ul><li>[Feb 00] 3rd TSG-S All-IP AdHoc in CA Discussion on NRM proposals and workplan </li></ul><ul><li>[Mar 00] 4th TSG-S All-IP AdHoc in JapanSteering Committee </li></ul>
  17. 17. 3GPP2 All-IP wireless network proposals <ul><li>Lucent </li></ul><ul><li>CISCO </li></ul><ul><li>Ericsson </li></ul><ul><li>Sun </li></ul><ul><li>Telcordia/TOSHIBA </li></ul><ul><li>Potential participants : Sprint PCS, Motorola, Samsung,Nokia, Vodafone/Airtouch, Sony, 3COM, GTE, Nortel, Bell Atrantic Mobile, Qualcomm, LGIC, IDO, SK Telcom, LG Telecom, Hyndai, NEC, KDD, DDI, Fujitsu, Oki, Ericsson </li></ul>
  18. 18. 3GPP2 All-IP NRM proposal Lucent
  19. 19. 3GPP2 UMTS/EDGE/cdma2000 Common All-IP NRM proposal, Lucent
  20. 20. Common concept of All-IP NRM Lucent
  21. 21. 3GPP2 All-IP NRM proposal CISCO
  22. 22. 3GPP2 All-IP NRM proposal Ericsson
  23. 23. 3GPP2 All-IP NRM proposal Telcordia and Toshiba
  24. 24. CDMA2000 Phased NRM
  25. 25. Features of 3GPP2 All-IP <ul><li>Mobile-IP-based [All proposals] </li></ul><ul><li>Mobility management - L2 mechanism [Sun] or IP-based mobility management [Cisco] for micromobility and Mobile-IP for macromobility [All proposals] </li></ul><ul><li>Call control - TBD (H.323[Lucent], SIP[Lucent, Telcordia,TOSHIBA]) </li></ul><ul><li>Compatibility with existing networks - Support TSG-P </li></ul><ul><li>network </li></ul><ul><li>QoS support - Requirement </li></ul><ul><li>Proposal to support UMTS and EDGE (Lucent) </li></ul><ul><li>Handover and Roaming - TBD </li></ul><ul><li>AirLink Optimization for Real-Time IP - Requirement </li></ul><ul><li>Security - RequirementGPRS-based </li></ul>
  26. 26. IETF <ul><li>IETF - Internet Engineering Task Force </li></ul><ul><li>Working group [IP routing for wireless/mobile hosts (Mobile IP)] </li></ul><ul><li>Extension and improvement of Mobile IP </li></ul><ul><li>Route optimization in Mobile IP </li></ul><ul><li>Mobility support in IPv6 </li></ul><ul><li>Mobile IP regional registration </li></ul><ul><li>Revised Tunneling for Mobile IP </li></ul><ul><li>Micromobility support </li></ul><ul><li>Mobile IP based micro mobility management protocol in the third generation </li></ul><ul><li>Cellular IP </li></ul><ul><li>Mobile IP Authentication, Authorization, and Accounting requirements </li></ul><ul><li>Adaptation to wireless network </li></ul><ul><li>Requirements on Mobile IP from a cellular perspective </li></ul>
  27. 27. MWIF <ul><li>MWIF - Mobile Wireless Internet Forum </li></ul><ul><li>Drive an Open Internet-based architecture that </li></ul><ul><ul><li>enables seamless integration of mobile telephony and IP-based Services (voice, data, video, web, etc.) for the mobile wireless networks, and </li></ul></ul><ul><ul><li>is independent of the Air interface </li></ul></ul><ul><li>Influence and align standards with target architecture </li></ul><ul><li>Act as driver that is complementary to the existing standards working groups and provide a common voice of global operators </li></ul><ul><li>Is operator/service provider driven </li></ul><ul><li>Supported by around 50 companies, which includes </li></ul><ul><ul><li>Vendors </li></ul></ul><ul><ul><ul><li>CISCO, Motorola, 3COM, Fujitsu, Hitachi, IBM, Lucent, Nokia, Nortel, Qualcomm, Siemens, Sony, Sun, etc. </li></ul></ul></ul><ul><ul><li>Providers </li></ul></ul><ul><ul><ul><li>Vodafone AirTouch, DDI, SprintPCS, IDO, Bell Atlantic Mobile, Telstra, etc.IETF - Internet Engineering Task Force </li></ul></ul></ul>
  28. 28. 3G.IP <ul><li>Consists of BT, AT&T, Ericsson, Nokia, Nortel, etc. </li></ul><ul><li>Target radio system : GPRS-based TDMA and CDMA </li></ul><ul><li>Interim network standards established by the end of 2000, which include both circuit-switched and packet data Elements </li></ul>
  29. 29. 3G.IP <ul><li>Consists of BT, AT&T, Ericsson, Nokia, Nortel, etc. </li></ul><ul><li>Target radio system : GPRS-based TDMA and CDMA </li></ul><ul><li>Interim network standards established by the end of 2000, which include both circuit-switched and packet data Elements </li></ul>
  30. 30. Comparison of 3GPP & 3GPP2 Proposals and discussion detailed version by the end of 2000 Current Specification Status Requirement only Further study Security Requirement only Header compression and striping AirLink Optimization for Real-Time IP TBD Supported Handover and Roaming UMTS and EDGE [Lucent] EDGE Support of other radio systems Requirement only GPRS QoS scheme QoS support Support TSG-P (ANSI-41 base) network Support of CS domain GSM terminals Compatibility with existing networks H.323 [Lucent], SIP [Lucent, Telcordia,TOSHIBA] Further study (H.323, SIP) Call Control L2 Mechanism [Sun, etc.] or IP-based MM [CISCO] for micromobility, Mobile-IP for macromobility [All] GSN+HSS=(GPRS MM) Mobility management (MM) Mobile-IP (All) GPRS Fundamental network configuration 3GPP2 3GPP
  31. 31. OPEN ISSUES More flexible and efficient QoS control QoS Support Support of circuit switching More efficient transmission scheme compatible with existing IP protocols Header compression/stripping AirLink Optimization development of appropriate hooks Different approach (GPRS vs. Mobile-IP) Harmonization of different approach Distributed authentication Roaming gateway, remote AAA, regional Mobile IP registering Roaming Appropriate protocols in cellular environments H.323, SIP Call control IP-centric QoS gurantee scheme GPRS QoS support scheme QoS support IP-Protocol based unified and single mobility management protocol GPRS, L2 mechanism, Mobile-IP, IP-Protocol based micro mobility Mobility management Goal Current Status
  32. 32. Post 2001 Architectures <ul><li>Time Frame 1 </li></ul><ul><ul><li>Separate Voice and Data Networks but integrated Access </li></ul></ul><ul><ul><li>TIA PN-4286 Network Architecture </li></ul></ul><ul><li>Time Frame 2 </li></ul><ul><ul><li>Combined Voice over IP and IP networks for both access and backbone networks </li></ul></ul><ul><ul><li>Voice and IP combined in Network </li></ul></ul><ul><ul><li>Voice and IP combined in Access </li></ul></ul><ul><ul><li>Voice is sent over IP instead of using PCM </li></ul></ul><ul><li>IP Network Options </li></ul><ul><ul><li>H.323: Cisco, HP, Sonus </li></ul></ul><ul><ul><li>MGCP: Cisco, Lucent, Nortel, Sonus, Telcordia </li></ul></ul><ul><ul><li>SIP: 3Com, Cisco, Ericsson, Lucent, Nortel </li></ul></ul><ul><ul><li>MEGACO authors: FORE, Gotham, Lucent, Nortel, Telcordia </li></ul></ul>
  33. 33. Protocol Stack
  34. 34. LINK LAYER (TULIP) <ul><li>Transport Unaware Link Improvement Protocol </li></ul><ul><li>A candidate of solution for interfering problem between RLP and TCP </li></ul><ul><li>Proposed at University of California, Santa Cruz </li></ul>
  35. 35. LINK LAYER (TULIP) <ul><li>Transport Unaware Link Improvement Protocol </li></ul><ul><li>A candidate of solution for interfering problem between RLP and TCP </li></ul><ul><li>Proposed at University of California, Santa Cruz </li></ul><ul><li>Service aware, not protocol aware (Looking into TCP headers is not necessary) </li></ul><ul><ul><li>Reliable service TCP data </li></ul></ul><ul><ul><li>Unreliable service UDP data, TCP ACKs* </li></ul></ul><ul><ul><ul><li>Subsequent cumulative ACKs supersede the information in the lost ACK </li></ul></ul></ul><ul><li>Periodical transmission with time interval using RLP layer buffer </li></ul><ul><ul><li>The time interval equal to propagation delay at Link layer </li></ul></ul><ul><ul><li>Decrease temporal deviation of transmission speed </li></ul></ul>
  36. 36. Network Layer Mobility Management <ul><li>Mobile IP </li></ul><ul><ul><li>HAWAII </li></ul></ul><ul><ul><li>Cellular IP </li></ul></ul><ul><ul><li>HMMP </li></ul></ul><ul><ul><li>GPRS Mobility Management </li></ul></ul><ul><ul><li>CDPD Mobility Management </li></ul></ul>
  37. 37. Network Layer Mobility Management
  38. 38. Beyond 3G <ul><li>OFDM & Dynamic Packet Assignment </li></ul><ul><ul><li>Transmission rate of 2-5Mbps in macrocell, 10Mbps and above in microcells </li></ul></ul><ul><li>Iceberg (UC-Berkeley) </li></ul><ul><ul><li>Potentially Any Network Services (PANS): beyond just the two party telephone call service; requires a network/device independent system </li></ul></ul><ul><ul><li>Personal Mobility: person as communication endpoint; requires a single identity for an individual – iUID </li></ul></ul><ul><ul><li>Service Mobility : seamless mobility across different devices in the middle of a service session </li></ul></ul><ul><ul><li>Easy Service Creation and Customization </li></ul></ul><ul><ul><li>Scalability, Availability and Fault Tolerance </li></ul></ul>
  39. 39. Conclusions <ul><li>ALL IP network : plenty of technologies and migration path unresolved </li></ul><ul><li>Many promise for ALL IP common network </li></ul><ul><li>Many research issues for 3G/4G Network architecture </li></ul>