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WIRELESS CORE NETWORK EVOLUTION

WIRELESS CORE NETWORK EVOLUTION. Scott Carlson Motorola Global Telecom Solutions Sector. June 5, 2004. Overview. Softswitch – What is it? Softswitch in the Wireless Environment Wireless/Wireline Convergence. Switching in General. Provides connectivity between users

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WIRELESS CORE NETWORK EVOLUTION

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  1. WIRELESS CORE NETWORK EVOLUTION Scott CarlsonMotorolaGlobal Telecom Solutions Sector June 5, 2004

  2. Overview • Softswitch – What is it? • Softswitch in the Wireless Environment • Wireless/Wireline Convergence

  3. Switching in General • Provides connectivity between users • Connects Access Networks into the Core Network • Provides advanced services • Call Routing • Call Features (3WC, CFU, CFC, CWT, BNAT…) • Call Accounting • System Statistics • Interfaces to Feature Platforms • e.g. Voice Mail • Signaling interfaces to various Network Elements • Very high reliability and QoS requirements

  4. Traditional Switches • Circuit oriented • TDM switch matrix • Highly integrated • Heirarchical architecture • Specialized hardware

  5. Softswitch a New Approach • Separate platforms for Call Control and Voice Path • Standards defined “internal” interfaces (H.248) • Packet switching instead of TDM circuit-based • Widely available hardware • Allows distributed, more peer-to-peer architecture

  6. Signaling & Control Signaling & Control SS7 SS7 Line Interfaces Line Interfaces Time Slot Inter-change Packet T D M T D M TDM or IP TDM or IP Media Gateway Media Gateway Softswitch Architecture Legacy Circuit Switch Soft Switch SS7 SS7 • Monolithic • (Control + Bearer Integrated) • Proprietary Interfaces • Inefficient Resource Utilization • Limited Scalability • Higher Operating Costs • Long Feature Development Intervals • Disaggregated • (Control separated from Bearer) • Open Interfaces • Most Efficient Resource Utilization • High Scalability • Lower Capital / Operating Costs • Rapid Feature Development

  7. Key Softswitch Benefits • Distributed architecture for more flexible network deployments • Highly scalable (up & down), independently scalable • Non-proprietary – quickly leverage technology improvements • Smaller footprint provides a reduces operations cost ~1/10th the size of legacy switches • Lower maintenance with less hardware • IP/ATM provides a Reduced Transport Costs vs. TDM • Standards-based interfaces allow for faster feature development

  8. SS7 H/W CPU Architecture Example • Element Management • System • Full O&M EMS Servers and RAID MSC Features Session Control Manager Media Gateway Control Function Roaming Signaling Gateway Trunking Signaling Gateway • Control Switch/ • Call Server • Call processing • SS7 and C7 signaling cards • Accounting • Media Gateway • Bearer Traffic Interface • High Port Densities • Multiple Transport Options Scalable MGWs

  9. Control Chassis/Call Server • Call Control • Routing decisions • Class of Service Management • Calling Features • Media Gateway Control Function • SS7 Signaling, H.248 Signaling • Accounting • Statistics • Multiple Control Chassis can be connected via IP as a single logical switch for capacity expansion

  10. Media Gateway • Supports TDM to TDM, TDM to IP and TDM to ATM under management of the Control Switch • Standards-based interoperability using H.248/MEGACO and MGCP • Toll quality voice enabled using the G.711 codec • Other compressed codecs can be supported such as G.729A, G.723.1 and G.726 as well as G.729B and G.711 with silence suppression • G.168 echo cancellation algorithms and very low delay inherent provide voice quality equal to or better than the PSTN • Distributed architecture – can locate the MGW in separate frame in separate location

  11. Crossbar Switch Electronic TDM Circuit Switch Packet Softswitch Core Network Direction • Network convergence is driving the momentum toward IP and VoIP for both wireline and wireless networks • Softswitch architecture enables packet switching of voice traffic in the IP environment • Softswitches bridge between circuit and packet networks • Long-distance networks were the first to use softswitches in the late 1990’s with VoIP • Softswitches are now being introduced for wireless and local wireline networks

  12. Softswitch in the Wireless Environment Softswitching has become mainstream in 2004, which is a year earlier than we originally thought. It allows carriers to offer new services and lowers network operating costs. Wireline, Cable and Wireless operators as well as Enterprises are all in early deployments with this next-generation equipment. - BAIRD U.S. Equity Research

  13. Softswitching in Wireless • In addition to the basic softswitch functions, a wireless softswitch must: • Perform Mobility Management • VLR • Call Delivery • Handover • Interface with the Radio Access Network • Interface with other wireless network elements • HLR • SMS • Prepaid • Location Based Services • IN/CAMEL Services • Packet Data Nodes

  14. BSC BSC PSTN/ISDN PSTN/ISDN Packet Core Domain VAS Services GAMA MMS-C SMS-C Photo Album Content Server Transcoding Wireless Core Network Overview IMS Services IMS Domain UMS VM Clients IMS/PoC/AD/PDS CS/IMS MGW CDMA RAN 2G RAN Domain Manager CS Core Domain HLR/HSS MSC Server CS/PS Services MGW EIR Pre-Paid IN Server RNC 3G RAN

  15. Key Benefits for Wireless • Initially MSC w/ Circuit Interfaces (today’s RAN std.) • Enables transition to All-IP environment (R5, R6) • Support for evolved 3G with Transcoding at the Edge • Distributed Switching • Enables IP Transport • Improved Cost Structure • Paves the way for Convergence

  16. Wireless / Wireline Convergence

  17. Convergence  Network Evolution “By 2006, the typical consumer will use his or her “phone” equally to: 1) talk to others, 2) e-mail or message and 3) access the Web; completely redefining conventional wisdom about consumer demand for mobile services.” Gartner Dataquest • Media • Streaming video • Video on demand • Interactive video services • TV/radio/data contribution & distribution • Telecommunication • ISDN services • Video telephony • Wideband data services Internet Broadband Wireless • Computer • Internet access • Electronic mail • Real time images • Multimedia • Mobile computing Convergence of applications and networks is driving the evolution to a common, Internet Protocol (IP) -based network architecture

  18. Core Network Convergence • Convergence can be viewed as: • Integrated Core Network / Unified Control Layer • Across access networks/devices/locations • Network that supports single device used at work, home and mobile, on various access networks • Services that can be accessed across variety of devices • IP Multimedia Subsystem (IMS) • 3G standard for wireless and Internet convergence • Ideal solution for wireline/wireless convergence • Access independent (IP connectivity can be through GPRS, CDMA2000, LAN etc.) • Based on Internet standard Session Initiation Protocol (SIP) • Enables Multimedia Services

  19. Application Developers Application Developers Application Developers Content Providers Content Providers Content Providers IMS Routers Middleware INTERNET Subs Database Gateway Access Technologies Wireless | Cable DSL BROADBAND IP NETWORKS Network Management SoftSwitch PoC Server PSTN Nomadic Automobile Hot Spot Home Enterprise COMMUNICATION DOMAINS Converged Services Network Vision • Common End-User Services • Accessibility Everywhere at Wireline-Like Cost and Desktop-LikeUser Experience • Voice, Messaging, PoC, Video, Web Services, Location Services, Content Storage InFiNet, IP Phone, Web Phone Terminals IP Based PBX

  20. Seamless Mobility • Extend PBX into the mobile work place • Extend Cellular Network into WLAN environments • Optimize infrastructure costs • Optimize coverage • Manage quality of service • Residential: IMS-PacketCable-WLAN-Multi-mode device • Multi-mode devices • VoIP over WLAN • VoIP over 3G cellular high speed packet data • GSM/CDMA voice • Multimedia in all domains

  21. What are the challenges? • Intelligent management of the user experience across a variety of access networks: • Transition point between realms • IP-TDM-IP • Transcoding for voice, video • Interface with a variety of applications servers • Added complexity for Mobility Management • Inter-technology handover • Multiple standards • QoS Management • Requires Advanced User Devices • Multiple Radio Modes (GSM, GPRS, WLAN) • SIP Clients • New vocoders

  22. The Pieces are Coming Together • Avaya, Motorola and Proxim have partnered to offer Enterprise Seamless Mobility solution due in 3Q04 • Several vendors have announced WLAN/cellular handsets recently • http://www.pcworld.com/news/article/0,aid,116334,00.asp • Qualcomm MSM7200 GSM/UMTS chipset supports WLAN and Bluetooth interfaces • Motorola demonstrated many of these concepts recently at WIRED NextFest2004…

  23. Liquid Media

  24. Questions?

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