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Next Generation Mobile Networks -
2010 and beyond
Dr. Sebastian Speicher
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Outline
• Motivation for NGMN: Be prepared when everything goes mobile
• The Next Generation Mobile Networks (NGMN) initiative– Some history: The GSM success story and lessons learned from UMTS
– NGMN's vision and mission
– Operators' key requirements
• NGMN high level system architecture
• Conclusion
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Everything goes mobile – today mobile voice, tomorrow mobile data
• Today, Mobile is replacing Fixed Networks for Voice
• In some markets mobile voice minutes already exceed fixed voice minutes
• However, the real game is data: In fixed networks, voice is only a fraction of the overall data volume
• Customers are getting used to bandwidth-demanding services, e.g., “YouTube”, MySpace, …
• And they want to have it anytime, everywhere – on the move Source: Lehmann Brothers research,
01/07
Proportion of voice minutes
carried over mobile network
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Our aim for the next decade
• Be prepared for the uptake of mobile data
• One mobile network for voice and data
• Fully consistent broadband user experience (DSL as benchmark)
• ‘Always on’ experience without significant network overhead or reduced terminal battery life
• Make Internet/user the limiting factor – not the access system!
2010
2020
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Some history: The GSM success story
• GSM: 2.1 billion subscribers across 920 networks in 222 countries & regions
• GSM was driven by Governments as show-case for the European Union – created momentum to challenge many previously national regulations & processes– Terminal/infrastr. testing, approval, and certification were unified on European level
Important prerequisite for the free circulation of mobiles
• GSM offered a truly new & important feature: Roaming– Service obligations from the beginning: same service everywhere– Frame for billing: revenue insurance for operators
• Standardization was done by operators, vendors and EU government Operator's view was considered sufficiently
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Some history: Lessons learned from UMTS
• UMTS still based on legacy core network Stated promises for high-speed data transfer could not be fulfilled
• Standardization mostly driven by vendors Operators' view was not considered sufficiently
• Targets and business model not clearly defined
• Sufficient quality of standards only reached after long period
• Mobiles were too late: market penetration & quality did not meet expectations– Too many options resulting in high integration and validation effort
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Next Generation Mobile Networks (NGMN)
• Initiative of a group of leading mobile network operators
• Vision: – Provide a technology vision for broadband wireless service delivery beyond 3G
• Mission: Create an ecosystem for next generation mobile networks– Address all key factors for success (Business, Service, and Technology)– Bring together all members of the mobile ecosystem: network infrastructure,
terminal, and chipset vendors, test system manufacturers, regulatory bodies, application developers, and service providers
• However, as a lesson learned from UMTS, operators speak first– Drive standardization by setting targets well in advance ( NGMN white paper)– Drive industry by articulating not only technical but also business vision
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Operator's key requirements
• Cost-efficiency requirements– Efficient reuse of existing assets (sites, antenna systems, spectrum)– Equipment sharing between network operators (e.g., access network sharing)– Standardized Operations & Maintenance (O&M) platforms, increased automation– Transparent Intellectual Property Rights (IPR) regime
• Functional requirements– Best-in-class radio performance & well-engineered network architecture– Optimized end-to-end Quality of Service (QoS) architecture– Seamless mobility– Efficient always-on support– Roaming and interconnection for IP-based services– Security
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Intellectual Property Rights (IPR)
• Today, IPR accounts for up to 20% of the 3G terminal price(with any new radio technology adding on top)
Background
• IPR has become a strong business asset for some big players
• New role "Patent Pirate": Smuggle patent into standard and retrieve royalties
• IPR situation even more complex due to intransparent cross-licensing ("I don't charge you if you don't charge me!")
NGMN requirements
• Successful NGMN ecosystem requires predictable and limited IPR costs
• IPR costs have to be known prior to any technology decision
IPR
+20%
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Performance requirements
• Improved spectral efficiency – 2-4 times higher than HSPA
• User data rates: up to 100 Mbit/s in downlink and 50 Mbit/s in uplink
• End-to-end latency less than 20 ms
• Efficient support of IP Services (incl. VoIP)
0 20 40 60 80
LTE
HSPA
VoIP Sessions per sector/MHz0 50 100 150
LTE
HSPA
Downlink peak rate [Mbps]
0 50 100 150
LTE
HSPA
Latency [ms]
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High level system architecture
• Access-agnostic packet-only core network– Serves a variety of radio technologies– In the beginning, co-existence with
CS-segments of today's 2G/3G networks(the latter will phase out over time)
• Radically simplified two node architecture– Decreases latency– Eases deployment– Enhances scalability– Simplifies transport network
GGSN
SGSN
RNC
NodeB
Access Gateway
eNodeB
UMTS NGMN
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Conclusion
• The Next Generation Mobile Networks (NGMN) initiative– Goal: Provide a cost-efficient enabling platform for innovative mobile services
– Create an ecosystem for next generation mobile networks– Drive standardization by setting targets and requirements well in advance– Drive industry by articulating not only technical but also business vision
• Be prepared for the future – when everything goes mobile everywhere
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Thank you for your attention!
Dr. Sebastian Speicher
T-Mobile International AG
Core Network Architecture
+49 160 969 83548 (My T-Mobile)
E-Mail: [email protected]. Sebastian SpeicherCore Network ArchitectureT-Mobile International AG
Mobile +49 160 969 83548Phone +49 228 936 189 96E-Mail [email protected]
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Spectrum for NGMN
• Existing spectrum (e.g., 900/1800/2100 MHz in Germany) – Spectrum can be shared by NGMN and legacy systems, but only with lower
bandwidth options of NGMN– Increasing 3G traffic will saturate UMTS core band spectrum (2100 MHz)
More spectrum with higher bandwidth required
• Most likely frequency bands for NMGN 20 MHz carrier– UMTS extension band (2500 -2690 MHz)
– UHF-Band 470-860 MHz (Digital Dividend)• Allows for efficient wide are coverage• Usage for mobile has to be agreed by ITU-R World Radio Conference (WRC)
