An efficient micro-mobility solution for SIP networks

VaIi, D.; Paskalis, Sarantis; Kaloxylos, Alexandros; Merakos, Lazaros

doi:10.1109/glocom.2003.1258803

Cited by 17 publications

(11 citation statements)

References 23 publications

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“…In this way, the IMS Communicator can promptly begin the creation of the local transmission/reception/player components using the new wireless interface at MN, without waiting for an entire endto-end roundtrip to CN. At the same time, ASSC sends a SIP INVITE message to AMG that first begins to deliver the adapted GSM audio to the IMS client, and then terminates session renegotiation with ASSC (step [10][11][12]. Let us stress that the proposed solution, differently from basic IMS session signaling, concurrently executes IMS session signaling and data adaptation/rebinding operations, thus further reducing media loss at MN.…”

Section: Audio Streaming Session Adaptation In Ihmasmentioning

confidence: 97%

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An IMS Vertical Handoff Solution to Dynamically Adapt Mobile Multimedia Services

Bellavista¹,

Corradi

2008

2008 IEEE Symposium on Computers and Communications

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Recent advances in wireless client devices and multimedia communications have motivated relevant standardization efforts, such as the IP Multimedia Subsystem (IMS) to support session control, mobility, and interoperability in all-IP next generation networks. Notwithstanding the central relevance of IMS for novel mobile multimedia services, IMS-based solutions still exhibit limited support for service continuity during handoffs, by omitting advanced techniques to reduce/eliminate handoff delays and quality degradations, especially during vertical handoffs. We propose an original solution for service continuity and dynamic multimedia content tailoring based on the primary design guideline of exploiting terminal-based decentralized handoff predictions to proactively activate application-level management operations (flow quality downscaling). The proposal is fully compliant with standard IMS and exploits infrastructure media gateways to execute content tailoring actions, without requiring heavy client-side adaptation operations. The reported experimental results point out that our solution can avoid streaming playout interruptions and significantly increase user-perceived service quality, without negative effects on handoff delay.

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Section: Audio Streaming Session Adaptation In Ihmasmentioning

confidence: 97%

“…Thereafter, a number of SIP-based research efforts tackled session adaptation at different protocol stack layers [12,13,14]. More recently, some support solutions are starting to face specific IMS-related issues introduced in the previous subsection.…”

Section: Related Workmentioning

confidence: 99%

An IMS Vertical Handoff Solution to Dynamically Adapt Mobile Multimedia Services

Bellavista¹,

Corradi

2008

2008 IEEE Symposium on Computers and Communications

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“…As already stated, the introduction of proxies located at wired network edges to split client-to-server connections is recognized as an effective solution to reduce both signaling traffic on service paths and QoS degradation at clients [16,19]. For instance, to the purpose of session continuity management, proxies could receive and store incoming flows during client disconnection to avoid frame losses and re-transmissions and could promptly fill up client buffers at client reconnection after handoff.…”

Section: Application-level Proxy-based Handoff Managementmentioning

confidence: 98%

“…Let us state that handoff management solutions at lower layers can hardly take application-dependent decisions and perform management operations selectively, e.g., only in case of service continuity requirements. Moreover, middleware components should mediate and manage service adaptation: only an infrastructure at the application level can properly exploit applicative protocols such as RealTime Protocol (RTP) and RealTime Streaming Protocol (RTSP) to adjust service provisioning by acting as a mediator between clients and servers [4,16]. In addition, handoff management supports should be SIP-based because SIP is recognized as a primary integration technology towards all-IP next generation networks [21].…”

Section: Application-level Proxy-based Handoff Managementmentioning

confidence: 99%

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SIP-Based Proactive Handoff Management for Session Continuity in the Wireless Internet

Bellavista

Corradi

2006

26th IEEE International Conference on Distributed Computing Systems Workshops (ICDCSW'06)

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New challenging deployment scenarios are accommodating limited and heterogeneous portable devices that roam in wired-wireless best-effort networks with session maintenance and continuity requirements. In particular, continuous services, e.g., multimedia streaming, should not experience any interruption while clients roam between different wireless access localities during service provisioning. The paper describes how to exploit the Session Initiation Protocol (SIP) to build a middleware for session continuity, also by integrating with our novel context-aware SIP notification package. In particular, the proposed middleware makes use of SIP notifications to update session information and to proactively activate session reconfiguration for roaming clients. Experimental results show that, notwithstanding the portable Java-based implementation, our SIP-based solution is feasible in most common wireless Internet deployment scenarios and achieves good scalability.

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A solution for transparent mobility with route optimization in the IP multimedia subsystem

Vidal

García-Reinoso

Soto

et al. 2013

Computer Communications

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This paper presents TRIM+, an architecture for transparent mobility management with route optimiza tion in IMS based networks. The design of our architecture is based on a previous work referred to as TRIM. TRIM was originally devised to provide transparent mobility support in the IMS, although transpar ency came at the cost of using a suboptimal data path between communicating end points. TRIM+ main tains transparency as a design criterium, and thus end user applications, running at the mobile node and its correspondent communication peers, are unaware of mobility management procedures. Additionally, the proposed design defines a set of route optimization procedures, allowing compliant devices to use the optimal data path for media communications. Furthermore, TRIM+ addresses packet loss management in scenarios where the media path cannot be maintained during the handover of the MN. To this end, our architecture enables the MN to request buffering capacity in its home network to temporarily store incoming media traffic during the handover, which would otherwise be dropped. This mechanism, as well as route optimization procedures, are executed transparently to the end user applications running at the communicating end points. As a proof of concept, we have implemented a software prototype of the TRIM+ architecture, deploying it over a real IMS testbed. By means of a set of experiments, we have val idated the mechanisms proposed in this paper, considering both UDP and TCP user traffic.

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An efficient micro-mobility solution for SIP networks

Cited by 17 publications

References 23 publications

An IMS Vertical Handoff Solution to Dynamically Adapt Mobile Multimedia Services

An IMS Vertical Handoff Solution to Dynamically Adapt Mobile Multimedia Services

SIP-Based Proactive Handoff Management for Session Continuity in the Wireless Internet

A solution for transparent mobility with route optimization in the IP multimedia subsystem

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