1. Architecture Issues in 4G Networks Mauricio Arango Sun Microsystems Laboratories Email: Mauricio.Arango@sun.comMauricio.Arango@sun.com Tel: (954) 217-0535

2. VON - 3/23/01Mauricio Arango2 Unique aspects of 4G as compared with wireline all IP Access network: mobile & wireless –Special routing requirements - Mobility management –Special registration requirements – AAA –Special QoS requirements

3. VON - 3/23/01Mauricio Arango3 4G Architecture Internet RAN All IP Core Network PSTN & Legacy Cellular GWY

4. VON - 3/23/01Mauricio Arango4 4G Access Network RNC Base Station Access Gwy Base Station RNC Base Station Access Gwy All IP Core Network RAN

5. VON - 3/23/01Mauricio Arango5 4G – All-IP Mobile Wireless Access Architecture Application-independent Radio Access Network –Non-IP components function as link layer – tunnels between access gateway and mobile terminal – handle microbobility –Macromobility – access points are access gateways –Evolution towards all-IP RAN – IP packets to the base station

6. VON - 3/23/01Mauricio Arango6 4G Core Network RAN Access Gateway QoS SIP Proxy AAA MM resource functions Data- bases Mobility Mgmt MGC Signaling Gwy Billing Media Gateway internet PSTN internet IP network JAIN/Parlay, other Location Application SIP, other Terminal Optional Application Core Basic Core

7. VON - 3/23/01Mauricio Arango7 Unique aspects of 4G as compared with wireline all IP – cont. Advanced IP-based terminals: –Not unique to wireless but embraced by industry – frequent update –Better user interface for many apps, not only voice –Large architecture implications

8. VON - 3/23/01Mauricio Arango8 4G VoIP SIP Architecture Internet All IP Core Access Network SIP Proxy Application Server SIP

9. VON - 3/23/01Mauricio Arango9 4G VoIP Softswitch Architecture Internet All IP Core Access Network Softswitch MEGACO/ MGCP Softswitch SIP

10. VON - 3/23/01Mauricio Arango10 A Transition Architecture Internet All IP Core Access Network SIP Access Gateway SIP App Server or Softswitch Legacy signaling

11. VON - 3/23/01Mauricio Arango11 Walled garden vs bazaar Internet All IP Core Access Network SIP Proxy 3 rd party Application Server SIP Firewall/ App-level gateway

12. VON - 3/23/01Mauricio Arango12 Challenges for 4G infrastructures Walled-garden vs. bazaar dilemma –With open Internet access and intelligent terminals how do access operators recover their investment? What could be new sources of revenue for access operators? –Access with QoS –Location information –Customer information Competition with low-cost grassroots networks – Wireless Ethernet 802.11b