ELEC5509 Mobile Networks

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1 ELEC5509 Mbile Netwrks Edmund Tse 2010 ELEC5509 Mbile Netwrks General Lecturer Prfessr Abbas Jamalipur Rm 732, Bldg J03 Tutrs Fazirulhisyam Hashim Rm 730, Bldg J03 Curse web page Username: E5509 Passwrd: mbinet2007 Assessment Tutrial attendance and reprt n weekly assignments (10%) Literature survey, reprt and presentatin (10%) 2-hur exam (75%) Text bk Jamalipur, The Wireless Mbile Internet: Prtcls, Architectures, and Services Table f Cntents General... 1 Intrductin t wireless and mbile Internet... 3 Wireless cellular data netwrks G cellular data services... 3 Mre recent cellular data services... 4 Cellular mbile netwrks (GPRS, EGPRS, UMTS, cdma2000)... 6 EGPRS... 6 Standardisatin... 8 UMTS... 9 cdma Mbile netwrks f the future Beynd third generatin systems A quick verview t 4G AdaptNet Quality f service in a mbile envirnment Vice ver IP (VIP) Page 1 f 42

2 ELEC5509 Mbile Netwrks Edmund Tse 2010 Advantages and disadvantages General VIP architecture and verview Vice quality measurement methds Transprt prtcls Signalling prtcls Additinal VIP netwrk cmpnents Emergency services access in wireline and wireless netwrks Key methds fr mbile lcatin Wireless Internet security Basic security techniques Security in wireless internet Transprt prtcls fr mbile netwrks Sme wireless TCP slutins Simulatin envirnment Traffic mdelling and management Netwrk prtcls fr mbile netwrks Mbile IPv Integrated Netwrks Page 2 f 42

3 ELEC5509 Mbile Netwrks Edmund Tse 2010 Intrductin t wireless and mbile Internet Defining mbile internet N single definitin, but cnsists f several ideas Lcatin-independent access Wire-free access Internet access Seamless access ISP-independent access Evlutin in telecmmunicatins technlgies Telephny wired, wireless, cellular Internet fixed, wireless, mbile An increase in: Number f services Time/space accessibility Number f applicatins Netwrk traffic vice, text, data Trends Fixed t mbile access fixed access fr vice service nearing saturatin Vice t data tday s internet users are ptentially future mbile internet users We see less and less time required t get the first 50 millin users Service tariff and device price Accessibility and ease f use, and number f applicatins available Future telecmmunicatin systems Supprt new and existing applicatins Hrizntal cmmunicatin between different access technlgy Cnnected thrugh a cmmn, flexible, seamless (IP-based?) cre netwrk Glbal raming and inter-wrking between different access technlgies with bth hrizntal (intrasystem) and vertical (inter-system) handver Wireless cellular data netwrks Mbile circuit vs packet switching Circuit switching Dedicates a channel t the data even when nt in use Lw system efficiency and lw data rates Gd real-time QS, and build n existing wireline CS netwrks Packet switching Mre suitable fr burst data traffic Higher system efficiency and higher data rates Needs change t existing CS cre netwrks Mre difficult in prviding real-time QS t multimedia applicatins 2G cellular data services Cellular digital packet data (CDPD) Peer multiprtcl, cnnectinless netwrk Shares unused channels in existing AMPS (later PCS) t prvide 19.2 kbps data Data transmissin fr mbile-mbile, mbile-fixed, fixed-mbile, fixed-fixed users Page 3 f 42

4 ELEC5509 Mbile Netwrks Edmund Tse 2010 May manage secure cmmunicatin t the HA r the mbile IP freign hme auth extensin Receive user prfile (differentiated services, security inf) frm AAA fr MS Recrd usage data, cmmunicate accunting inf frm PCF t AAA Rute packets t IP netwrk r reverse tunnel t HA Manage layer 2 cnnectin between PCF and PDSN Maintain PPP cnnectin Tag and prcess packets as necessary fr QS prfile AAA (in service prvider netwrk) Pass authrisatin requests between PDSN and hme IP netwrk Stre accunting fr MS frm the PDSN Fr mbile IP, may supprt handffs between PDSNs that d nt invlve hme IP net Fr mbile IP, dynamically identify a HA and assign a user t that HA AAA (in hme IP netwrk) Authenticate and authrise the MS based n requests frm lcal AAA Prvide user prfile and QS infrmatin t PDSN Fr mbile IP, dynamically identify a HA and assign a user t that HA AAA (in a brker netwrk) Frward requests and respnses between service prvider netwrk and hme IP netwrk withut direct assciatin Mdes f peratin Nn-transparent new requests created based n incming requests Transparent brker AAA nly relays Redirectin brker AAA refers service prvider t anther AAA Packet cntrl functin (PCF) Manage layer 2 cnnectin t PDSN Interact with PDSN t supprt drmant handff Buffer incming PDSN packets when radi resurces are unavailable Cmmunicates with RRC t manage radi resurces with MS Frward serving PCF inf t target PCF fr hard handff Radi resurces cntrl (RRC) Optinal: authenticatin and authrisatin f MS fr radi access; air interface encryptin Mange radi resurces fr cmmunicatin between MS and PCF Mnitr radi resurce status Bradcast packet zne ID in the system verhead message Mbile statin (MS) Manage data link prtcl t PDSN Request apprpriate radi resurces frm the netwrk Buffer packets frm applicatins when radi resurces are unavailable Detect change in packet zne, system r netwrk ID t initiate drmant handff with RRC Architectural mdels fr mbile IP MS access t SPN using air interface t cnnect t radi netwrk (RN) One service prvider at a time (hme r visited netwrk) Mbility management using air interface prcedures including interactin between VLR and HLR An pen R-P interface between RN and PDSN Interactin f PDSN t lcal and visited AAA and ther servers using IP Page 13 f 42

ELEC5509 Mbile Netwrks Edmund Tse 2010 Accunting Accunting infrmatin exchanged between visited AAA servers and hme AAA servers using standardised accunting data interchange frmat (ADIF) Cellular

5 ELEC5509 Mbile Netwrks Edmund Tse 2010 Accunting Accunting infrmatin exchanged between visited AAA servers and hme AAA servers using standardised accunting data interchange frmat (ADIF) Cellular mbility management Lcatin management (LM) technique Find the real lcatin f a MT frm time t time and find its nearest pint f attachment t the netwrk Handff management (HM) technique Need efficient, reliable and quick handff scheme t maintain and re-rute an nging sessin while MT mves between cverage areas Mbility management = LM + HM Wireless IP mbility management PCF t PCF handff Link-layer mbility management functin used t manage the change f R-P attachment May happen fr an active r drmant MS Invlves PDSN selectin New R-P sessin setup Tear dwn f previus R-P sessin Each PCF is uniquely identified by: System ID (SID) Netwrk ID (NID) Packet Zne ID (PZID) PDSN t PDSN handff Mbile IP prvides IP-layer mbility management acrss PDSNs MS perfrms this handff by registering with its HA as per RFC 2002 with sme extensins Requires active MS, and invlves: Establish new PPP sessin Detect new FA via agent advertisement message Authenticatin via remte authenticatin dial in user service (RADIUS) Register with HA Page 15 f 42

6 ELEC5509 Mbile Netwrks Edmund Tse 2010 Quality f service in a mbile envirnment General technlgy-based QS requirements Timeliness delay, respnse time, delay variatin (jitter) Bandwidth system/applicatin level data rate, transactin rate Reliability - mean time t failure r repair, mean time between failures, lss r crruptin rate User-level QS requirements Perceived QS based n applicatin type (detail, quality, smthness f cntent) Cst per use r per unit Security cnfidentiality, integrity, digital signatures, authenticatin QS n an end-t-end basis is challenging when mre than ne netwrk is invlved QS management in wireless netwrks Data applicatins ver wireless require sphisticated QS techniques Shrt lss f cmmunicatins during handver may be acceptable in vice cmmunicatins Need similar capabilities at the new pint f attachment Blind spts are unavidable End-user QS is als limited by: Battery Prcessing pwer Screen size/reslutin Traffic flws are transprted by a variety f netwrks, each with its wn QS an security measures Principles fr QS guarantees Need marking f packets fr ruter t distinguish between different classes, and new ruter plicy t handle packets accrdingly Must prvide prtectin (islatin) fr ne traffic class frm thers Require plicing mechanisms t ensure surces t adhere t bandwidth requirements While prviding islatin, it is desirable t use resurces as efficiently as pssible Allcating a set prtin f bandwidth t each flw may be inefficient if allcatin unused Need call admissin prcess, where applicatin declares its needs, s netwrk may blck it if it is beynd capacity. IP slutins fr QS supprt Integrated services (IntServ) 3 classes f service: Guaranteed-service delay-bunded service agreement Cntrlled-lad nminal statistical delay service agreement Best-effrt interactive burst, interactive bulk r asynchrnus QS managed classes require signalling and admissin cntrl in netwrk ndes Usually Resurce Reservatin Prtcl (RSVP) is used Ruters maintain state infrmatin f allcated resurces QS requirements fr different flws Resurce request sent by receiver t sender wh cnfirms Resurces reserved alng the path Arriving sessin must declare its QS requirement (R-Spec) and the traffic characteristics it will send (T-Spec) Advantages Prvides service classes which clsely match different applicatins Leaves existing best-effrt service unchanged (and as efficient) Page 19 f 42

ELEC5509 Mobile Networks

ELEC5509 Mobile Networks ELEC5509 Mbile Netwrks Edmund Tse 2010 ELEC5509 Mbile Netwrks General Lecturer Prfessr Abbas Jamalipur Rm 732, Bldg J03 abbas@ee.usyd.edu.au Tutrs Fazirulhisyam Hashim Rm 730, Bldg J03 fhisyam@ee.usyd.edu.au