handoff Resources

ZDNet Dictionary Definition

Handoff: Switching a cellular phone transmission from one cell to another as a mobile user moves into a new cellular area. The switch takes place in about a quarter of...; Full Handoff Definition >>

ZDNet Resources

Proactive Scan: Fast Handoff With Smart Triggers for 802.11 Wireless LAN: It has been a challenging problem to support VoIP-type delay sensitive applications in an 802.11 wireless LAN because the standard handoff procedure implemented in many current 802.11 products occurs a delay deem unacceptable to VoIP users. To reduce this delay, the authors have developed a fast handoff scheme called Proactive...; Tags: Technique, 802.11 Wireless LAN, IEEE 802.11, Handoff, Wireless LANs, Wi-Fi, Wireless, Productivity; White papers 2007-01-29
TCP HandOff: A Practical TCP Enhancement for Heterogeneous Mobile Environments: Many different kinds of wireless access networks have been deployed for the Internet and have become inseparable parts of the Internet. But TCP, the most widely used transport protocol of the Internet, was designed for stationery hosts. In particular, TCP faces severe challenges when user moves around in these networks...; Tags: Mobile, Handoff, TCP, TCP-HO, Tcp/Ip, Networking; White papers 2006-11-20
Adding Network-Layer Intelligence to Mobile Receivers for Solving Spurious TCP Timeout During Vertical Handoff: With the help of Mobile IP/IPv6 and soft handoff, on-going TCP sessions can remain active and handoff packet loss can be avoided. However, TCP still faces several performance degradation issues due to the disparities in bandwidth and propagation delay between different access networks. Particularly, during vertical handoffs, some undesirable phenomenon...; Tags: Mobile, Handoff, TCP, Tcp/Ip, Networking; White papers 2006-09-18
Fast Handoff for Seamless Wireless Mesh Networks: This paper presents the architecture and protocols of SMesh, a completely transparent wireless mesh system that offers seamless, fast handoff, supporting VoIP and other real time application traffic for any unmodified 802.11 device. In SMesh, the entire mesh network is seen by the mobile clients as a single, omnipresent access...; Tags: Mobile, Network, Handoff, Access Point, Mesh Networking, Wireless, Networking; White papers 2006-06-22
An Adaptive Multipath Protocol for Efficient IP Handoff in Mobile Wireless Networks: Achieving IP handoff with a short latency and minimal packet loss is essential for mobile devices that roam across IP subnets. Many existing solutions require changes to be made to the network or transport layer, and they tend to suffer from long handoff latency in either soft or hard handoff...; Tags: Mobile, Network, Handoff, IP, Wireless Network, Network Technology, Networking; White papers 2006-05-12

TCP Offload Through Connection Handoff: This paper presents a connection handoff interface between the operating system and the network interface. Using this interface, the operating system can offload a subset of TCP connections in the system to the network interface, while the remaining connections are processed on the host CPU. Offloading can reduce computation and...; Tags: Network, Handoff, Operating System, Memory Bandwidth, Association For Computing Machinery, TCP, Tcp/Ip, Networking; White papers 2006-04-21
DiffServ QoS Provisioning for Real Time Traffic in Frequent Handoff MobileIPv6 Networks: The next-generation mobile networks are evolving towards a versatile IP-based network that can provide various real-time multimedia services to mobile users. Two major challenges in establishing such a wireless mobile Internet are support of fast handoff and provision of Quality of Service QoS over IP-based wireless access networks. In this...; Tags: IPv6, Mobile, Network, Handoff, IPv6 Network, Testbed, Advertising & Promotion, Networking, Marketing; White papers 2006-04-01
Make-Before-Break MAC Layer Handoff in 802.11 Wireless Networks: To support real-time applications such as Voice-over-IP within an 802.11Wireless LAN, efficient handoff mechanisms are required when a mobile client moves from one Access Point to another. This paper presents the design, implementation and performance results of MAC layer (layer-2) handoff algorithms which implement make-before-break mechanisms at the MAC layer...; Tags: Algorithm, IEEE 802.11, MAC, Network, Handoff, Wireless Network, Access Point, Engineering, Wireless; White papers 2006-02-28
Multi Layer Rules Based Framework for Vertical Handoff: Seamless interoperability between two dissimilar networks require handoff from one network to the other. Such handoffs are known as vertical handoffs. Vertical handoff introduces a shift in the approach to handoffs. It deals with handoffs between dissimilar networks, such as from an access point to a base station or vice...; Tags: Handoff, Networking; White papers 2005-08-02
Soft Handoff and Uplink Capacity in a Two-Tier CDMA System: In systems using Code-Division Multiple Access CDMA, user capacity is enhanced by using soft handoff. Soft handoff means that a given user communicates simultaneously with two or more base stations until its path gain to just one of them is several dB stronger than its path gain to any other....; Tags: CDMA, Handoff, Cellular Phones, Consumer Electronics, Personal Technology; White papers 2005-03-18
Design and Evaluation of iMesh: An Infrastructure-Mode Wireless Mesh Network: In this paper, iMesh, an infrastructure-mode 802.11-based mesh network, is designed and evaluated. In the paper, 802.11 access points double as routers making the network architecture completely transparent to mobile clients, who view the network as a conventional wireless LAN. Layer-2 handoffs between access points trigger routing activities inside the...; Tags: Network, Handoff, iMesh, Wireless LANs, Mesh Networking, Wireless, Networking, Wi-Fi; White papers 2005-03-17
HAMS: Layer 2 Handoff Accurate Measurement Strategy in WLANs 802.11: The layer 2 handoff latency in WLANs 802.11 has traditionally been measured as the time between the first probe request message sent by the mobile station and the arrival of a reassociation response message from an access point. However, that measure does not represent the time the station remains disconnected...; Tags: Strategy, IEEE 802.11, Layer 2, Handoff, WLAN, Handoff Latency, Wireless LANs, Wi-Fi, Wireless; White papers 2005-02-18
SyncScan: Practical Fast Handoff for 802.11 Infrastructure Networks: This paper describes SyncScan, a low-cost technique for continuously tracking nearby base stations by synchronizing short listening periods at the client with periodic transmissions from each base station. The paper implements this SyncScan algorithm using commodity 802.11 hardware and demonstrates that it allows better handoff decisions and over an order...; Tags: Base Station, IEEE 802.11, Network, Handoff, San Diego, University Of California, Wireless LANs, Wi-Fi, Wireless; White papers
An Inter-Domain Routing Protocol for Multi-Homed Wireless Mesh Networks: This paper presents a routing protocol for multi-homed wireless mesh networks that provide uninterrupted connectivity and fast handoff. The authors approach integrates wireless and wired connectivity, using multicast groups to coordinate decisions and seamlessly transfer connections between several Internet gateways as mobile clients move between access points. The protocol optimizes...; Tags: Handoff, Protocol, Johns Hopkins University, Wi-Fi, Mesh Networking, Wireless, Networking; White papers

Additional Resources

50 questions asked and answered on Android: At the very end of the Google I/O 2008 conference last week the Android development team hosted a great fireside chat on the new mobile platform. The session was free-form, completely driven by questions from the audience. Although Google was trying to keep mum on a number of issues, several...; Tags: Developer, Google Inc., Application, Google Android, Phone, Device, Platform, OEM, App, Question, Q., A., XMPP, A. Goal, A. Qemu, Thing Cert, Apk, UMA, A. Compatability, A. Distribution, Android Device, Linux, Wireless LANs, Advertising & Promotion, Productivity, Telecom & Utilities, Open Source, Wi-Fi, Operating Systems, Software, Wireless, Marketing, Ed Burnette; Blog posts 2008-06-05
Red Hat names new Whitehurst CEO; Szulik stays chairman: Red Hat on Thursday named former Delta Airlines executive James Whitehurst CEO effective Jan. 1. Current chief Matthew Szulik continues as chairman. Whitehurst was most recently the chief operating officer at Delta Airlines and helped navigate the airline's bankruptcy restructuring. Whitehurst joined Delta in 2002. In a...; Tags: Red Hat Inc., Delta Airlines, Open Source, Larry Dignan; Blog posts 2007-12-20
Scalable Real-Time Gateway Assignment in Mobile Mesh Networks: The perception of future Wireless Mesh Network WMN deployment and usage is rapidly evolving. WMNs are now being envisaged to provide citywide "last-mile" access for numerous mobile devices running media-rich applications with stringent Quality of Service QoS requirements. Consequently, some current-day conceptions underlying application support in WMNs need to be...; Tags: Gateway Inc., Mesh Networking, Mobile, Network, Assignment, Association For Computing Machinery, Wireless Mesh Network, Wi-Fi, Wireless; White papers 2007-12-13
A simple storage device that saves lives: A simple storage device that saves livesProcedure, not medium.It's the fact that there is a procedure and that there is some reminder to follow it.Paper pros:1. Cheaper2. No training to know how to write on itElectronic pros handheld or similar:1. Paper is passive...a handheld can remind a doc or pharmacist...; Tags: HEALTHCARE, Benefits, Insurance, simple storage device, patient, OPRR, Paper Pro, storage device, health care, storage; Discussion threads 2007-12-12
If Skype was disruptive to telcos, then Cubic Telecom is their nightmare (and good for you): If Skype was disruptive to telcos, then Cubic Telecom is their nightmare and good for youThis is incredibly complicated.This sounds like the most incredibly complicated thing I have ever heard of. It continues to amaze me that such hoops must be jumped through just to save a few bucks. I...; Tags: Telecom & Utilities, Wireless LANs, Cellular phones, phone, Cubic, MAXroam SIM, Wi-Fi, Cubic Telecom, cell phone number, cell phone, telecommunications, Skype Technologies S.A.; Discussion threads 2007-11-28
WiMax provider Clearwire in low-profile Seattle nomadic test: WiMAX solutions provider Clearwire, which is building a national WiMAX network with SprintNextel, is doing some low profile nomadic access testing in its home city of Seattle. But for those of you who cannot wait for Clearwire-Sprint's Mobile WiMAX, don't get too excited about this test. ...; Tags: Base Station, Network, Clearwire Corp., WiMAX, Wi-Fi, Wireless, Russell Shaw; Blog posts 2007-09-20