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Feasibility Study of A-interface over Internet Protocol

Feasibility Study of A-interface over Internet Protocol. Master’s Thesis Presentation Eero Laitinen, 7.9.2009. Supervisor: Professor Heikki Hämmäinen. Outline. Objective of the Study and Methodology Mobile Market Situation All-IP Transition Case Study: Feasibility of AoIP technology

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Feasibility Study of A-interface over Internet Protocol

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  1. Feasibility Study of A-interface over Internet Protocol Master’s Thesis Presentation Eero Laitinen, 7.9.2009 Supervisor: Professor Heikki Hämmäinen

  2. Outline • Objective of the Study and Methodology • Mobile Market Situation • All-IP Transition • Case Study: Feasibility of AoIP technology • Conclusions

  3. Outline • Objective of the Study and Methodology • Mobile Market Situation • All-IP Transition • Case Study: Feasibility of AoIP technology • Conclusions

  4. Objective of the Study andMethodology • Objectives: • Compare GSM A-interface over IP to legacy A-interface over TDM in terms of CAPEX and OPEX • Study factors influencing expected lifetime of GSM • Methodology: • Literature survey • Books, standards, whitepapers, press releases, etc • Interviews • Ericsson expert interviews

  5. Outline • Objective of the Study and Methodology • Mobile Market Situation • All-IP Transition • Case Study: Feasibility of AoIP technology • Conclusions

  6. Mobile Market Situation • 2G GSM currently the most successful • 3G technologies are growing importance • LTE is at the ”door step”

  7. Outline • Objective of the Study and Methodology • Mobile Market Situation • All-IP Transition • Case Study: Feasibility of AoIP technology • Conclusions

  8. Transport Technologies • Three main transport technologies in mobile networks: • Time Division Multiplexing (TDM) • Asynchronous Transfer Mode (ATM) • Internet Protocol (IP) • Why IP? • Some reasons: • Packet based data transmission considered more efficient and future proof • IP instead of TDM • IP used in the datacom índustry  IP can utilize the economies of scale • IP instead of ATM

  9. The Traffic and Revenue Challenge

  10. All-IP Transition • Reduce costs • Networks are simply transformed to use IP • Preparing for the future • E.g. Circuit-Switched mobile network from TDM/ATM/IP to IP only • Generate revenues • All-IP based core network will provide access to IP based applications via variety of different access systems • 3GPP IMS and EPS/SAE

  11. Reduce costs in GSM architecture: A-interface from TDM to IP

  12. Outline • Objective of the Study and Methodology • Mobile Market Situation • All-IP Transition • Case Study: Feasibility of AoIP technology • CAPEX benefits • OPEX benefits • GSM lifetime speculation • Conclusions

  13. CAPEX: Transcoding

  14. CAPEX: MGW Redundancy

  15. CAPEX: Transmission equipment • Network nodes in AoTDM architecture use TDM ports (e.g. STM-1), whereas network nodes in AoIP architecture use Ethernet ports (e.g. Gigabit Ethernet) • One STM-1 port can carry 1890-1953 voice calls, whereas one Gigabit Ethernet port can carry over 26 000 voice calls • About 13-times more STM-1 ports are needed to fulfil a certain traffic need • The CAPEX benefit depends on the unit prices of the ports

  16. CAPEX Summary • Transcoderless BSS • No need for transcoders in BSS anymore  Transcoder equipment savings • Transcoding in MGW • MGW capacity is impacted due to ”new” transcoding functionality • If capacity decreases, more hardware needs to be purchased, and if capacity increases, existing hardware becomes available • The impact depends on the traffic model • MGW redundancy • Extended A-interface enables N+1 MGW redundancy  Less MGW capacity overdimensioning • Transmission equipment • TDM ports in BSC and MGW are replaced by Ethernet ports  Less Ethernet ports are needed than TDM ports and typically Ethernet ports are also less expensive

  17. AoIP vs. AoTDM: OPEX • Single transport technology • Operating one transport technology instead of multiple ones is more cost-efficient • AoIP is only one part of the big picture • Node configuration • Reduced node configuration effort in BSC, MGW and MSC-S • Service availability • Better service availability due to N+1 MGW redundancy • Speech quality • Transcoder Free Operation doesn’t reduce voice quality • Same can be achieved with TFO in AoTDM • Training • Synergy savings with 3G RAN

  18. GSM lifetime speculation • Operating more than one, not to mentions two, mobile network is considered to be too expensive • 3G technologies are expected to replace GSM • 3G will enable new revenue streams • However • 3G coverage and existing handset base not yet good enough • Situation is expected to get better around 2015 • Three competing 3G technologies create market uncertainty • LTE commercial operation is expected to begin in the near future • Could it be LTE instead of 3G that will replace GSM? • It remains to be seen

  19. Outline • Objective of the Study and Methodology • Mobile Market Situation • All-IP Transition • Case Study: Feasibility of AoIP technology • Conclusions

  20. Conclusions • GSM has still strong market position • 3G and LTE are expected to replace GSM eventually • AoIP is more cost-efficient option to build and operate GSM networks than legacy AoTDM • AoIP is also more future proof • AoIP has business opportunities especially in emerging markets • In developed markets operators will more likely choose 3G and/or LTE

  21. Questions?

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