1 Indirect Routing (Triangular Routing) Indirect Routing - PDF document

A IP reference Architecture for A IP reference Architecture for Wireless Mobile System Wireless Mobile System 無線網路多媒體系統 無線網路多媒體系統 無線網路多媒體系統 無線網路多媒體系統 �������������������������� ��������������������������� 吳曉光博士 吳曉光博士 吳曉光博士 吳曉光博士 �������������������������������� Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory Agenda Agenda Reading Reading � All-IP System: Beyond 3G � [Bhagwat96] Pravin Bhagwat, Charles Perkins, and Satish Tripathi, “Network Layer Layer Mobility: An Architecture and � Evolutions of PCS Survey � ALL IP Challenges • Mobile IP/Cellular IP • QoS Provisions: Integrated Service / DiffServ � Next Week (Wireless TCP) Wireless & Multimedia Network Laboratory � � � � Wireless & Multimedia Network Laboratory � � � � � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory Register Operation Register Operation Tunneling Operation Tunneling Operation Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory 1

Indirect Routing (Triangular Routing) Indirect Routing (Triangular Routing) RO (Route Optimization) RO (Route Optimization) Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory Mobility Management Mobility Management � Micro-Mobility � Network Mobility All IP All IP Something to happen? Something to happen? Wireless & Multimedia Network Laboratory � � � � Wireless & Multimedia Network Laboratory � � � � � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory MT Scheduler MT Scheduler Integration Scenario Integration Scenario Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory 2

Resource Managements Resource Managements WAL WAL Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory Detail WAL Detail WAL BRAIN BRAIN Wireless & Multimedia Network Laboratory � � � � Wireless & Multimedia Network Laboratory � � � � � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory QoS Support QoS Support IP QoS Modeling IP QoS Modeling Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory 3

Mobile network scenarios Mobile network scenarios A mobile network in a B3G system A mobile network in a B3G system Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory Traffic flows with basic network mobility Traffic flows with basic network mobility Lecture Outline Lecture Outline � Mobility in wireless LANs � Problems in making Internet mobile � Canonical packet forwarding architecture for Mobile-IP � Columbia’s Mobile-IP schema Wireless & Multimedia Network Laboratory � � � � Wireless & Multimedia Network Laboratory � � � � � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory Mobility in Wireless LANs: Basestation as Mobility in Wireless LANs: Basestation as Making the Internet Mobile Making the Internet Mobile Bridges Bridges � Goal • Provide continuous IP connectivity to “mobile” users. � Mobility == change in how MH accesses the internet Ethernet 128.97.92 Ethernet 128.97.92 • Bridge Physically move so that access to internet is via a different basestation. • Switch network interfaces 128.97.92.72 � 128.97.92.5 Continuous connectivity Router • Datagrams for MH must be delivered to its current location 128.97.84.1 • Mobility must be transparent to applications � Applications must not die or need to restarted Ethernet 128.97.84 128.97.92.68 � Performance transparency also desirable 128.97.92.68 128.97.92.68 Fails! � Desirable • 128.97.92.68?? Secure • Work across security domains � Basestations are bridges(layer 2) – i.e. they relay MAC frames • Require no changes to existing stationary hosts • Smart bridges avoid wasted bandwidth � Works the within an ethernet(or other broadcast LAN) • Fails across network boundaries, and in switched LANs(e.g. ATM) Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory � � � � � � � � Wireless & Multimedia Network Laboratory Wireless & Multimedia Network Laboratory 4