西安电子科技大学：《移动互联网技术》课程教学资源（PPT课件）03 应用层移动性

多动互联网技术-应用层移动性 苏锐丹

移动互联网技术-应用层移动性 苏锐丹

Previous solution routing packets toward a particular device using IP as endpoint identifiers Application Layer using non-IP identities as personal identifiers

◼ Previous solution routing packets toward a particular device using IP as endpoint identifiers ◼ Application Layer using non-IP identities as personal identifiers

focus of mobility to switch from the endpoint or device toward the person a common personal identity to be associated with multiple devices techniques for transferring contexts,including media flows,between devices a common non-IP personal identifier is associated with different interfaces on the same devices

◼ focus of mobility to switch from the endpoint or device toward the person ◼ a common personal identity to be associated with multiple devices techniques for transferring contexts, including media flows, between devices ◼ a common non-IP personal identifier is associated with different interfaces on the same devices

User-centric Mobility Application Application Mobility Mobility Local Area Wide Area Network Network

User-centric Mobility

■Authentication bind an application identity with one or more host IP addresses ■Registration register the IP address(es)that can be used to reach a particular application identity ■Rendezvous service determine which IP address(es)is (are) bound to an application identifier

◼ Authentication bind an application identity with one or more host IP addresses ◼ Registration register the IP address(es) that can be used to reach a particular application identity ◼ Rendezvous service determine which IP address(es) is (are) bound to an application identifier

Application Mobility Using the Domain Name System Fully Qualified Domain Name(FQDN) Support dynamic and secure updates

Application Mobility Using the Domain Name System ◼ Fully Qualified Domain Name (FQDN) ◼ Support dynamic and secure updates

DHCP DHCP DNS Client Server Server DHCP Request Including Client FQDN Option(81),S bit =0 Plus Domain Name DNS UPDATE Request/Response (PTR Record) DHCP Ack Including Client FQDN Option (81),S bit =0 Plus Domain Name DNS UPDATE Request/Response (A Record)

Authentication:Implemented using DNS security extensions. Registration:Implemented using dynamic DNS updates to PTR and A records by hosts and/or DHCP servers. Rendezvous service:Implemented using the FQDN-to-IP address mapping service provided by DNS

Application Mobility Using SIP ■RFC3261 an application layer control protocol that provides signaling for the creation, termination,and modification of sessions ■VOIP应用

Application Mobility Using SIP ◼ RFC3261 an application layer control protocol that provides signaling for the creation, termination, and modification of sessions ◼ VOIP应用

a generic session initiation framework rather than a structured method and protocol for session instantiation and control Session Description Protocol the detailed session parameters are agreed between two SIP endpoints Real Time Protocol(RTP) the actual media session is transported

◼ a generic session initiation framework rather than a structured method and protocol for session instantiation and control ◼ Session Description Protocol the detailed session parameters are agreed between two SIP endpoints ◼ Real Time Protocol (RTP) the actual media session is transported