A fast handoff scheme for IP over Bluetooth
10 Dec 2002-pp 51-55
TL;DR: A new scheme is presented for improving the handoff performance in BLUEPAC by helping a base station controller helps a mobile device to establish a connection to new base station by giving their addresses and clocks.
Abstract: A lot of people use a cell phone, PDA, and laptop computer in their daily lives. Bluetooth which enables incompatible devices to communicate with each other over a wireless link can speed up the growth in popularity. BLUEPAC(BLUEtooth Public ACcess) is designed to support IP over Bluetooth and provide users with access to a public network such as the Internet. Our work is motivated by the need for a fast handoff in BLUEPAC A mobile device experiences frequent handoffs due to the short radius of the piconet which is about 10 m. A handoff requires a connection establishment between a mobile device and a new base station which is is a time-consuming procedure in the frequency hopping system. This situation may cause many connection losses which hurt the network performance as a result. We present a new scheme for improving the handoff performance. The basic idea is that a base station controller helps a mobile device to establish a connection to new base station by giving their addresses and clocks. Simulation results show that our scheme significantly reduces handoff delay and imposes a very light overhead on the base station.
Citations
More filters
01 Jan 2009
TL;DR: In this paper, the authors provide a comprehensive and up-to-date coverage of topics and fundamental theories underpinning measurement techniques and localization algorithms in WSNs. And they provide relevant references and the latest studies emerging out of the wireless sensor network field.
Abstract: Wireless localization techniques are an area that has attracted interest from both industry and academia, with self-localization capability providing a highly desirable characteristic of wireless sensor networks. Localization Algorithms and Strategies for Wireless Sensor Networks encompasses the significant and fast growing area of wireless localization techniques. This book provides comprehensive and up-to-date coverage of topics and fundamental theories underpinning measurement techniques and localization algorithms. A useful compilation for academicians, researchers, and practitioners, this Premier Reference Source contains relevant references and the latest studies emerging out of the wireless sensor network field.
290 citations
TL;DR: A novel middleware solution, called Mobile agent-based Ubiquitous multimedia Middleware (MUM), that performs effective and context-aware handoff management to transparently avoid service interruptions during both horizontal and vertical handoffs is proposed.
Abstract: Advances in wireless networking and content delivery are enabling new challenging provisioning scenarios where a growing number of users access continuous services, e.g., audio/video streaming, while moving among different points of attachment to the Internet, possibly with different connectivity technologies, e.g., Wi-Fi, Bluetooth, and cellular 3G. That calls for novel middlewares capable of dynamically personalizing service provisioning to the characteristics of client environments, in particular to discontinuities in wireless resource availability due to handoffs. The paper proposes a novel middleware solution, called Mobile agent-based Ubiquitous multimedia Middleware (MUM), that performs effective and context-aware handoff management to transparently avoid service interruptions during both horizontal and vertical handoffs. MUM exploits the full visibility of wireless connections available and their handoff implementations (handoff awareness), of service quality requirements and handoff-related quality degradations (QoS awareness), and of network topology and local resource availability (location awareness); that visibility enables MUM to provide original solutions for handoff prediction, multimedia continuity via adaptive data buffering/pre-fetching, and proactive re-addressing/rebinding.
66 citations
Cites background from "A fast handoff scheme for IP over B..."
...For BT, [2] proposes the first BT-based infrastructure called BLUEtooth Public Access (BLUEPAC); [18] improves BLUEPAC handoff latency, while [16] employs statically dimensioned soft handoff techniques to eliminate packet losses....
[...]
01 Jan 2005
TL;DR: Latest contributions include developing plug-and-play middleware functionalities for Symbian mobile devices, extending the use of the earlier results to state-of-the-art mobile devices and experimental results on the behaviour of protocols used in wireless IP networks are presented.
Abstract: The contemporary information age is equipped with rich and affordable telecommunication services. In the future, people have even more flexibility when true wireless Internet and real-time multimedia are provided seamlessly over heterogeneous wireless networks. Optimally combining the capacity and services of the current and emerging networks requires a holistic view of mobility, resource and service management. This thesis contributes to the research and development of these hybrid systems with three main contributions. Firstly, a system architecture for vertical handoff in location-aware heterogeneous wireless networks is proposed. The proposed architecture enables the mobile node to prepare for approaching vertical handoffs and wake-up a hotspot interface. The needed communication procedures are discussed, and inter-related issues of mobility and geolocation information are considered in proportion to usability, advantages and limitations. Secondly, a framework for the analysis of vertical handoff algorithm sensitivity to various mobility parameters including velocity, handoff delay and dwell time is introduced. Handoff smoothing with a dwell-timer is analyzed as one potential scheme for optimizing vertical handoff locally. It is compared to a power based algorithm to find out its sensitivity to the changes in effective data rates, velocity of the terminal and the amount of handoff delay. The analysis focuses on the transition region, having case studies on both moving-in and moving-out scenarios. An optimal value for dwell-timer is found through simulations, showing a performance gain over power based algorithm as a function of mean throughput. The analysis is extended also to a multiple network scenario. Thirdly, experimental results on the behaviour of protocols used in wireless IP networks are presented. Prototype systems demonstrate results of using Mobile IP with a fuzzy logic algorithm for vertical handoff in a heterogeneous network environment and the role of IPv6 when using a voice application in a wireless LAN environment. Latest contributions include developing plug-and-play middleware functionalities for Symbian mobile devices, extending the use of the earlier results to state-of-the-art mobile devices.
35 citations
Cites background from "A fast handoff scheme for IP over B..."
...Sometimes handoff optimization can be RAN specific [76], indicating the need to separately consider optimization of vertical, horizontal, macro and micro mobility and their variations in heterogeneous wireless access network cases....
[...]
28 Nov 2005
TL;DR: A middleware architecture designed to ease mobility-aware service development is presented, which hides technology-specific mechanisms and offers a set of facilities for context awareness and handoff management.
Abstract: The overwhelming success of mobile devices and wireless communications is stressing the need for the development of mobility-aware services Device mobility requires services adapting their behavior to sudden context changes and being aware of handoffs, which introduce unpredictable delays and intermittent discontinuities Heterogeneity of wireless technologies (Wi-Fi, Bluetooth, 3G) complicates the situation, since a different treatment of context-awareness and handoffs is required for each solution This paper presents a middleware architecture designed to ease mobility-aware service development The architecture hides technology-specific mechanisms and offers a set of facilities for context awareness and handoff management The architecture prototype works with Bluetooth and Wi-Fi, which today represent two of the most widespread wireless technologies In addition, the paper discusses motivations and design details in the challenging context of mobile multimedia streaming applications
24 citations
TL;DR: The reported results show the effectiveness of the approach, which permits to achieve the desired quality-delay tradeoff in common Internet deployment environments, even in presence of vertical handoffs.
Abstract: Self-adaptive management and quality adaptation of multimedia services are open challenges in the heterogeneous wireless Internet, where different wireless access points potentially enable anywhere anytime Internet connectivity. One of the most challenging issues is to guarantee streaming continuity with maximum quality, despite possible handoffs at multimedia provisioning time. To enable handoff management to self-adapt to specific application requirements with minimum resource consumption, this paper offers three main contributions. First, it proposes a simple way to specify handoff-related service-level objectives that are focused on quality metrics and tolerable delay. Second, it presents how to automatically derive from these objectives a set of parameters to guide system-level configuration about handoff strategies and dynamic buffer tuning. Third, it describes the design and implementation of a novel handoff management infrastructure for maximizing streaming quality while minimizing resource consumption. Our infrastructure exploits i) experimentally evaluated tuning diagrams for resource management and ii) handoff prediction/awareness. The reported results show the effectiveness of our approach, which permits to achieve the desired quality-delay tradeoff in common Internet deployment environments, even in presence of vertical handoffs.
23 citations
Cites background from "A fast handoff scheme for IP over B..."
...Handoff latency can cause non-negligible frame delivery delays and losses, thereby inducing visualization gaps that are unacceptable for several classes of mobile multimedia applications....
[...]
References
More filters
17 Oct 1999
TL;DR: In this article, a protocol called BLUEPACIP (Bluetooth Public Access Control Protocol) is proposed for mobility issues in Bluetooth networks, which is based on IP as a basis and additionally includes functionalities of mobile IP and cellular IP.
Abstract: We present protocol concepts for an extension of IP for mobility issues in Bluetooth networks. The protocol is called BLUEPAC IP, where BLUEPAC stands for "BLUEtooth Public ACcess". "Public access" means access to various kinds of information in public areas, e.g. airplane, train, hotel room, department store, museum. Bluetooth will reside in low-cost chips that provide wireless communication up to OSI Layer 2. By the end of this year many mobile devices, e.g. notebooks, PDAs, cell phones, will contain Bluetooth chips as a cable replacement. But Bluetooth is move powerful: with a suitable network protocol that inherits all aspects of IP, it will be possible to provide IP services over Bluetooth. BLUEPAC IP takes IP as a basis and additionally includes functionalities of mobile IP and cellular IP for local IP address assignment, routing issues and handoff support.
183 citations
"A fast handoff scheme for IP over B..." refers background or methods in this paper
...In this paper, we present a new scheme for improving the handoff performance....
[...]
...Simulation results show that our scheme significantly reduces handoff delay and imposes the very light overhead on the base station....
[...]
08 Nov 2000
TL;DR: This paper concentrates on the necessary layer 2 protocol concepts for supporting mobility and handoffs between different access points, and presents the necessary adaptations for allowing IP datagrams to be exchanged between the mobile Bluetooth devices and access points.
Abstract: The BLUEPAC (BLUEtooth Public ACcess) concepts present ideas for enabling mobile Bluetooth devices to access local area networks in public areas, such as airports, train stations and supermarkets. The proposed protocols support mobility on OSI layer 3. This paper concentrates on the necessary layer 2 protocol concepts for supporting mobility and handoffs between different access points. Furthermore, we present the necessary adaptations for allowing IP datagrams to be exchanged between the mobile Bluetooth devices and access points. The BLUEPAC protocol concepts have been implemented above a Bluetooth emulation system to test their feasibility. First results clearly showed the importance of minimizing the handoff duration to allow efficient operation of upper layer protocols such as TCP.
84 citations
"A fast handoff scheme for IP over B..." refers background in this paper
...Simulation results show that our scheme significantly reduces handoff delay and imposes the very light overhead on the base station....
[...]