programmable networks Programmable broadband Internet and mobile nets

programmable networks Programmable broadband, Internet and mobile nets Andrew T. Campbell Wireless Media Systems Comet Group Center for Telecommunications Research Columbia University http: //comet. ctr. columbia. edu/~campbell/

programmable networks making networks more programmable QOS control management net state programmable nets signaling distributed systems technology broadband transport kernel

programmable networks What is a broadband kernel? • motivation – to facilitiate the easy creation and introduction of new multimedia services with end-to-end QOS guarantees into broadband networks • concepts – – – “open programming networking” environment what do we by open? what do we mean by programmable? QOS explicitly modeled and programmable broadband kernel service multimedia services use broadband kernel

new services and applications service abstractions middleware layer degree of programmability programmable networks programming model broadband kernel servicesbinding and applications network interface base (BIB) programming model QOS abstractions broadband (ATM) QOS abstractions NG Internet mobile networks

Broadband kernel Active networks Conservative moderate Capsules-based Switchlets-based mobiware xbind -accelerate introduction of new service, protocols, etc. -signal and data integrated -inject customized code into nodes Mobile code-based -new services with QOS -signal and data separate -CORBA-based Objects-based programmable networks simple taxonomy of programmable Nets radical

programmable networks network objects with QOS

programmable networks Pro. Net projects at Columbia • xbind broadband kernel project (Lazar) – broadband kernel – focus: ATM networks • mobiware project (Campbell) – QOS-aware middleware for mobile multimedia networking – focus: QOS in next generation mobile Internet

programmable networks approach • CORBA-based signaling • open and flexible device control – – programmable ATM switches/routers mobile capable switches/routers base stations, and mobile and fixed devices programmable multimedia devices • transports – native ATM transport – active and adaptive transport

programmable networks CORBA-based Signaling programmability Client Application Object Implementation BIB CORBA IP Physical

programmable networks xbind: connection management Connection Manager Source Router Topo logy File Destination

programmable connection management programmable networks connection manager Destination node server source Node Server

programmable networks programming network nodes xbind/mobiware Virtual switch GSMP CTR Fore ASX-100 Virtual switch q. GSMP IP Switch NEC Model 5 Virtual switch q. GSMP CTR ATML Virata 1 Virtual basestation q. GSMP Pentium Base-stations

In port/vpi/vci -> Out port/vpi/vci vitural switch Schedulable Region Estimators q. GSMP Multiplexer Buffer Manager programmable networks programming explicit switch QOS Scheduler

virtual switch object idl programmable networks interface Virtual. Link: Media. Transporter{ void set. Schedulable. Region(in short dimension, in short nb. Hyperplanes, in int. Array coefficients) raises (Reject); void set. Scheduling. Policy(in short nb. Classes, in short scheduler. Type, in short. Array scheduler. Params) raises (Reject); void get. Scheduling. Policy(out short nb. Classes, out short scheduler. Type, out short. Array scheduler. Params) raises (Reject); void set. Buf. Mgmt. Policy(in short nb. Classes, in short cls. To. Buf. Map, in short. Array buffer. Masks, in short. Array thresholds) raises (Reject); void get. Buf. Mgmt. Policy(out short nb. Classes, out short cls. To. Buf. Map, out short. Array buffer. Masks, out short. Array thresholds) raises (Reject); void set. Traffic. Descriptors(in short nb. Classes, in short. Array class. Mask, in short. Array class. Parameters) raises (Reject); void set. QOSConstraints(in short nb. Classes, in short. Array class. Mask, in short. Array class. Parameters) void get. Estimator(out short update. Threshold, out short type, out short. Array parameters) raises (Reject); };

programmable networks comet. ctr. columbia. edu/xbind/www. SR/SRapplet. html

programmable networks multimedia services creation • Resource Reservation • Transport Selection and Binding • Management Binding

programmable networks services programming Transport Controller Route Manager Camera Switch Route Teleconference Display Device Manager QOS Mapper TP Connection Manager TP Broadband kernel services

programmable networks programmable testbed Computer Center Fore ASX-200 NYNEX // SUN Solaris 2. 4 CTR Fore ASX-100 CTR NEC Model 5 Sun Solaris 2. 3 SUN Solaris 2. 5 HP 9000 s PC PC CTR ATML Virata 1 CTR Scorpio Stinger 1 HP 9000 s Columbia Video Network

programmable networks xbind Platform Teleconference Manager VPN Manager Transport Controller QOS Mapper Router Device Manager Camera Display Microphone Speaker Connection Manager Node. Server q. Stack k. Stack ip. Stack Node. Server Fore API Fore ASX-100 Node. Server NEC API NEC Model 5 Node. Server GSMP ATML Virata 1 Sun. OS/Solaris, Windows NT/95, HP-UX

programmable networks End-to-end QOS Programmability Node. Server q. GSMP Virtual Switch Virtual Link switch/router Workstation/PC Virtual Link Virtual CPU Virtual Switch Virtual Link

programmable networks http: //comet. ctr. columbia. edu/wireless

programmable networks Next generation mobile Internet End-to-End Qo. S mobiware End-to-End Qo. S Transport Mobility distributed system technology (Corba, xbind, Java)

programmable networks Mobiware: programmable mobile network adaptive multimedia applications with controlled QOS Adaptive & Active Transport Objects (ATOs) wireline/wireless packet networks

programmable networks Mobiware features • QOS controlled handoff signaling protocol • programmable transport (a-trane) – mobile code put where it is needed – active filters provide media scaling – adaptive error control (FEC/ARQ hybrid) • new adaptive service for air-interface • programmable feature – – handoff signaling network service (controlled load, adaptive, ABR) programmable MAC support programmable beacon (quality, SNR, QOS)

programmable networks QOS controlled handoff • • mobile soft-state connection groups per mobile logical anchor points programmable features – – – mobile soft-state (on/off) mobile/ network initiated forward/backward soft/hard connection groups (on/off) QRP RAP CG

programmable networks Adaptive network service • represents flows as multi-layer streams • base layer hard QOS • enhancement layer soft QOS • clients periodic probe for more resources QRP RAP adpt resv

programmable networks Active and adaptive transport • highly programmable object-based transport • transport algorithms represented as java classes • active transport objects (ATOs) – mobile code – executes in mobile capable switches, base-station and devices

programmable networks Beaconing and handoff QRP RAP Soft-state timeout Handoff set-up COS

programmable networks Programmable beaconing Cymbal-air BS: NWID: Signal Level: SNR: QOS Cymbal-air 02 00 18 10 1000 Voice-air 01 00 25 20 500 BS 1 Wave. LAN Monitor Signaling Voice-air Mobile BS 2 beacon Sign_on_req Air Interface Sign_on_ack

programmable networks virtual mobile device object idl // mobile_device. idl // interface Mobile. Device : Node. Server { // initiate the location of Core and conn. Manager void initiate(in string<40> cm. Name) raises(Reject); // register with the current basestation void mobile. Register(in long cgi, inout End. Point bs) raises(Reject); // conn setup from the current base station to the network, called by mobile void mobile. Conn. Setup(inout QOSSpecification qos. Spec, inout End. Point host_A, in string<40> core. Name) raises(Reject); // handoff setup from the current base station to the network, called by mobile void handoff. Setup(inout QOSSpec. List qos. Spec, inout Source. List, srcnamelist, inout End. Point. List destlist) raises(Reject); // refresh a soft-state connection group through the current // base station to the network void refresh. CG(in Direction dir) raises(Reject); };

programmable networks Media scaling during handoff QRP RAP COS

programmable networks Inter domain handoff and adaptive error control RAP New QRP COS

programmable networks RAP COS

programmable networks Mobiware testbed connection Manager handoff. Setup() refresh. CG() conn. Setup() refresh. CG() locate. COS() locate. QRP() locate. RAP() route. Server node. Server virtual. BS handoff Initiation() virtual. MD

programmable networks Implementation • ATM network with Fore, NEC, ATML and Scorpio switches • air interface: Wave. LAN with prog device API • mobile device: laptop (Windows NT), initiate handoff based on signal strength and QOS • • base station: PC (Windows NT), send beacons data : Wave. LAN MAC <-> AAL 5 <-> ATM signalling : xbind <-> Corba <-> IP <-> ATM location management : Orbix. Name

programmable networks Adaptive network service Media Selector Filter Media Selector with hand-off

programmable networks Media scaling ATO Dynamic Rate Shaping Filter “drs” at 300 Kbits/sec “drs” at 200 Kbits/sec

programmable networks DCT dropping Dynamic Rate Shaping Filter The effect of “drs” on picture size (Kbytes)

programmable networks Active filters

programmable networks Some handoff results – – handoff delay soft-state refresh delay per node soft-state teardown delay hard-state teardown delay

programmable networks Publications and Software publications – xbind • http: //comet. ctr. columbia. edu/xbind/ • Lazar, A. A. , Lim, K. S. and Marconcini, F. , ``Realizing a Foundation for Programmability of ATM Networks with the Binding Architecture, '' IEEE Journal on Selected Areas in Communications, Special Issue on Distributed Multimedia Systems, – mobiware • http: //comet. ctr. columbia. edu/wireless/ • Campbell A. T. , "Mobiware: QOS-Aware Middleware for Mobile Multimedia Networking, ” Proc. IFIP 7 th International Conference on High Performance Networking, White Plains, New York, April 1997 • software – http: //comet. ctr. columbia. edu/software/

programmable networks OPENSIG and IEEE OPENARCH’ 98 • Network programmability forums – OPENSIG on open signaling for ATM, Internet and mobile networks, San Francisco, CA, April 3 -4, 1998 October 6 -7, 1997, • http: //comet. ctr. columbia. edu/openarch – IEEE OPENARCH’ 98 on Open Architecture and Network Programmability, April • http: //comet. ctr. columbia. edu/openarch

programmable networks Concluding remarks • Programmable networks will revolutionize – the way new network services are offered • Conservative approach is more acceptable – to telecommunications industry but still seen as radical departure • Extreme programming – (i. e. , capsule-based) provides the most flexible but lacks application • Programmable mobile networking • Content-based networking