Service-oriented mobility management architecture for seamless handover in ubiquitous networks

Kashihara, Shigeru; Tsukamoto, Kazuya; Oie, Yuji

doi:10.1109/mwc.2007.358961

Cited by 23 publications

(13 citation statements)

References 8 publications

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“…Hence, the approach can be configured so as to take into consideration classic QoS criteria of network performance, such as costs, bandwidth, quality of the signal (i.e. Received Signal Strength Indicator -RSSI), indicators measured using the IEEE 802.21 Media Independent Handover [3] standard, or other solutions [17].…”

Section: Ii8 Comparison Between the State Of The Art And Our Architementioning

confidence: 99%

The “Always Best Packet Switching” architecture for SIP-based mobile multimedia services

Ghini

Ferretti

Panzieri

2011

Journal of Systems and Software

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-This paper presents a distributed architecture for the provision of seamless and responsive mobile multimedia services. This architecture allows its user applications to use concurrently all the wireless network interface cards (NICs) a mobile terminal is equipped with. In particular, as mobile multimedia services are usually implemented using the UDP protocol, our architecture enables the transmission of each UDP datagram through the "most suitable" (e.g., most responsive, least loaded) NIC among those available at the time a datagram is transmitted. We term this operating mode of our architecture Always Best Packet Switching (ABPS). ABPS enables the use of policies for load balancing and recovery purposes. In essence, the architecture we propose consists of the following two principal components: i) a fixed proxy server, which acts as a relay for the mobile node and enables communications from/to this node regardless of possible firewalls and NAT systems, and ii) a proxy client running in the mobile node responsible for maintaining a multi-path tunnel, constructed out of all the node's NICs, with the above mentioned fixed proxy server. We show how the architecture supports multimedia applications based on the SIP and RTP/RTCP protocols, and avoids the typical delays introduced by the two way message/response handshake of the SIP signaling protocol. Experimental results originated from the implementation of a VoIP application on top of the architecture we propose show the effectiveness of our approach.

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Section: Ii8 Comparison Between the State Of The Art And Our Architementioning

confidence: 99%

The “Always Best Packet Switching” architecture for SIP-based mobile multimedia services

Ghini

Ferretti

Panzieri

2011

Journal of Systems and Software

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“…Therefore, it is desirable to provide a seamless mobility technology without modification of APs. To achieve such seamless mobility, the following two requirements must be satisfied: (1) selection of an AP with better performance from among multiple candidate APs and (2) preservation of communication quality during handover. For (2), we proposed a handover management scheme based on the number of frame retransmissions [2]- [4].…”

Section: Introductionmentioning

confidence: 99%

“…In the proposed scheme, an MN is assumed to move between WLANs with different IP subnets. In [2], we first employed multihoming architecture to prevent a disruption period due to handover processes. That is, since an MN with two WLAN interfaces (a multi-homing MN) can connect to two APs before starting handover, an MN never experiences a disruption period due to handover processes.…”

Section: Introductionmentioning

confidence: 99%

“…For example, in the method proposed in [2], even if an MN has two WLAN interfaces to eliminate a disruption period due to handover process, there is no guarantee that the MN can select an AP with better performance for a Copyright c 2009 The Institute of Electronics, Information and Communication Engineers handover. In ubiquitous WLANs, the MN may find multiple candidate APs at one time and needs to select an appropriate AP from among them.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the proposed method is designed to avoid degradation of communication quality due to collisions between hidden terminals and/or simultaneous transmission from neighboring MNs. Furthermore, our handover management system [2], [6] is extended to introduce our AP selection method, which requires no modification of AP.…”

Section: Introductionmentioning

confidence: 99%

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Proactive AP Selection Method Considering the Radio Interference Environment

Taenaka

Kashihara

Tsukamoto

et al. 2009

IEICE Trans. Inf. & Syst.

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SUMMARYIn the near future, wireless local area networks (WLANs) will overlap to provide continuous coverage over a wide area. In such ubiquitous WLANs, a mobile node (MN) moving freely between multiple access points (APs) requires not only permanent access to the Internet but also continuous communication quality during handover. In order to satisfy these requirements, an MN needs to (1) select an AP with better performance and (2) execute a handover seamlessly. To satisfy requirement (2), we proposed a seamless handover method in a previous study. Moreover, in order to achieve (1), the Received Signal Strength Indicator (RSSI) is usually employed to measure wireless link quality in a WLAN system. However, in a real environment, especially if APs are densely situated, it is difficult to always select an AP with better performance based on only the RSSI. This is because the RSSI alone cannot detect the degradation of communication quality due to radio interference. Moreover, it is important that AP selection is completed only on an MN, because we can assume that, in ubiquitous WLANs, various organizations or operators will manage APs. Hence, we cannot modify the APs for AP selection. To overcome these difficulties, in the present paper, we propose and implement a proactive AP selection method considering wireless link condition based on the number of frame retransmissions in addition to the RSSI. In the evaluation, we show that the proposed AP selection method can appropriately select an AP with good wireless link quality, i.e., high RSSI and low radio interference.

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Design and analysis of an IEEE 802.21-based mobility management architecture: a context-aware approach

Fernandes

Karmouch

2012

Wireless Netw

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Service-oriented mobility management architecture for seamless handover in ubiquitous networks

Cited by 23 publications

References 8 publications

The “Always Best Packet Switching” architecture for SIP-based mobile multimedia services

The “Always Best Packet Switching” architecture for SIP-based mobile multimedia services

Proactive AP Selection Method Considering the Radio Interference Environment

Design and analysis of an IEEE 802.21-based mobility management architecture: a context-aware approach

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