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Slide titleIn CAPITALS
50 pt
Slide subtitle 32 pt
Feasibility Study of A-interface over Internet Protocol
Master’s Thesis Presentation
Eero Laitinen, 7.9.2009
Supervisor: Professor Heikki Hämmäinen
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Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
Feasibility Study of A-interface over Internet Protocol 2009-09-02
Outline
• Objective of the Study and Methodology• Mobile Market Situation• All-IP Transition• Case Study: Feasibility of AoIP technology• Conclusions
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
Feasibility Study of A-interface over Internet Protocol 2009-09-02
Outline
• Objective of the Study and Methodology• Mobile Market Situation• All-IP Transition• Case Study: Feasibility of AoIP technology• Conclusions
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
Feasibility Study of A-interface over Internet Protocol 2009-09-02
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
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Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
Feasibility Study of A-interface over Internet Protocol 2009-09-02
Outline
• Objective of the Study and Methodology• Mobile Market Situation• All-IP Transition• Case Study: Feasibility of AoIP technology• Conclusions
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
Feasibility Study of A-interface over Internet Protocol 2009-09-02
Mobile Market Situation
2G GSM currently the most successful 3G technologies are growing importance LTE is at the ”door step”
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
Feasibility Study of A-interface over Internet Protocol 2009-09-02
Outline
• Objective of the Study and Methodology• Mobile Market Situation• All-IP Transition• Case Study: Feasibility of AoIP technology• Conclusions
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
Feasibility Study of A-interface over Internet Protocol 2009-09-02
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
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
The Traffic and Revenue Challenge
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
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
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
Reduce costs in GSM architecture: A-interface from TDM to IP
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
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
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
CAPEX: Transcoding
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
CAPEX: MGW Redundancy
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
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
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
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
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
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
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
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
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Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
Feasibility Study of A-interface over Internet Protocol 2009-09-02
Outline
• Objective of the Study and Methodology• Mobile Market Situation• All-IP Transition• Case Study: Feasibility of AoIP technology• Conclusions
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
Feasibility Study of A-interface over Internet Protocol 2009-09-02
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
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Slide title 40 pt
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Feasibility Study of A-interface over Internet Protocol 2009-09-02
Questions?Questions?
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Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
Feasibility Study of A-interface over Internet Protocol 2009-09-02