Telcordia Technologies, Inc.

Toyota Motor Corporation

Toyota Infotechnology Center, U.s.a., Inc.

Onur Altintas

Wai Chen

Yoshihisa Suwa

Ashutosh Dutta

Yibei Ling

Shengwei Cai

Sunil H Madhani

Jasmine Chennikara

Jasmine Chennikara-Varghese

Harshad Tanna

Chiao-Wei Lee

The present invention relates to the reduction of handoff delays for mobile telematics applications. In particular, the present invention provides a method employing GPS technology to define IP addresses in a mobile environment in order to reduce delays and transient data loss caused by handoff from one network to another.

Fast handoff using GPS technology for mobile telematics

A method of tailoring data streams transmitted to networked user devices is disclosed in which environment information associated with each device is stored at an agent located on those devices. This environment information may include information related to the hardware, interface and application capabilities of the particular device. In another embodiment, this environment information is transmitted and stored at an agent at a local network gateway. And in another embodiment, the environment information is then stored at a mirror agent located in a backbone network of a service provider. By referring to this environment information, a service provider can tailor the transmission of data streams, such as multimedia streams, to a device based on the capabilities of the device and the associated network.

Transparent service adaptation in heterogeneous environments

Wireless internet in the in-vehicle environment is an evolving reality that reflects the gradual convergence of wireless and internet technologies. The present invention provides an application layer system that makes wireless internet access adaptive to dynamically changing heterogeneous network environments, by stressing carrier-independence and access transparency. To achieve these objectives, the present invention provides the following features: HTTP session continuity and automatic HTTP failure recovery; network environment awareness and application-level preemptive handoff based on bandwidth capacity.

Preserving HTTP sessions in heterogeneous wireless environments

As multicast services become prevalent, it is important to find viable solutions for multicasting to mobile nodes. This problem is complicated by the necessity to support multicast services over existing backbone and access networks that may have varying network and/or link layer multicasting capabilities. While most work on supporting multicast services focuses on the IP layer solution, the present invention presents an application-layer approach for providing multicast services to mobile users traversing networks with diverse multicast capabilities. The present invention places multicast proxies in the backbone and access networks to support several multicast-related functions at the application layer including the creation of virtual networks for dynamically tunneling through non-multicast-capable networks.

Application-layer multicast for mobile users in diverse networks

The present invention presents an architecture to dynamically measure and estimate the throughput perceived by a user during a connection in real-time in a wireless network system. The architecture system design of the present invention allows for information gathering independent of the mathematical models used and takes into account security settings in the network hosts. The present invention also sets forth a number of throughput estimators (TEs) that can be used within the architecture to gather the information needed to carry out the throughput estimation calculations. The throughput estimations can then be used for download rate control, QoS, load balancing, etc. The present invention also provides algorithms to calculate the real-time throughput experienced by a user flow.

Estimator for end-to-end throughput of wireless networks

The present invention provides a system and method for automatically configuring a mobile host in a Wireless Local Access Network (WLAN) environment. In particular, the present invention employs GPS technology and an Information Gateway to provide preconfigured information about different access points of the WLAN within the vicinity of the current location of the mobile host.

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Florham Park, NJ, United States of America

Onur Altintas