Toshiba America Research, Inc.

Telcordia Technologies, Inc.

Kabushiki Kaisha Toshiba

Telcordia Inc.

Toshiba Corporation

Toshikazu Kodama

Prathima Agrawal

Yasuhiro Katsube

Tao Zhang

Ryoko Matsuo

David Famolari

Faramak Vakil

Shuichi Obayashi

Praveen Gopalakrishnan

Sunil H Madhani

Shinichi Baba

Kamesh Medepalli

Ashutosh Dutta

Yoshihiro Ohba

Kenichi Taniuchi

Kensaku Fujimoto

Miriam Tauil

Hiroshi Kobayashi

Takeshi Ozeki

Hiroshi Esaki

Abhrajit Ghosh

Tsuguhiro Hirose

Takashi Kamitake

Keiichi Obara

Moncef Elaoud

Ravichander Vaidyanathan

Dave Famolari

Kim Byungsusk

Shunichi Obayashi

Agrawal Prathima

Systems and methods are described for secure and seamless roaming between internal and external networks. Double and triple tunnels may be used to connect a mobile node to a correspondent host. A mobile node may include the ability to connect to two networks simultaneously to enable seamless roaming between networks.

Secure and seamless WAN-LAN roaming

The present application discloses, inter alia, a system for improving the aggregate throughput of a wireless local area network which includes: at least one access point that is equipped with at least one transceiver configured to simultaneously transmit and receive at multiple frequencies using multiple channels; and the access point being configured to acquire channel conditions of users and to pool sets of users on the channels based on the channel conditions.

Channel partitioning for wireless local area networks

Methods for coordinating power usage and link adaptation in wireless communications are described. Terminals and/or access points (APs) may attempt to modify terminals' transmit power in relation to a desired communication data transfer rate. Link adoption may also be used in conjunction with the described methods.

Terminal transmit power control with link adaptation

A system and method for equalizing traffic between antenna beams is described. Aspects of the system and method may vary the beam widths to attempt to equalize traffic based on non-real-time communications and/or non-real-time communications.

Load equalizing antennas

This document describes Toll Free IP (TIP), a business model and its enabling methods to provide no-charge-to-user ('toll-free') connectivity through IP-based access networks (e.g., public wireless hotspot networks based on IEEE 802.11), which may be operated by different network operators. With TIP, the use of networks to communicate with a toll-free IP destination will be paid by the owner of the toll-free IP destination. A toll-free IP destination can be identified in many ways, e.g., by a toll-free IP address, toll-free Internet Domain Name, a toll-free Universal Resource Identifier or Universal Resource Locator. TIP enables a user to use networks without prior service subscriptions with network or service providers and without any special terminal software or hardware for gaining permission to use a network. It allows users to use more access networks, i.e., larger 'footprints', than any individual network operator or aggregator can provide. With TIP, a service provider can provide services over IP-based access networks without the need to have business arrangements with each individual network operator or aggregator. TIP can also be used to enable other value-added services such as Prepaid IP, Collect IP, Selective Charging, and a single prepaid account across access networks of multiple operators or aggregators and even across wireless LANs (e.g., public hotspots and enterprise wireless LANs) and cellular networks.

Method and systems for toll-free internet protocol communication services

A helper station system is disclosed that can enhance communications in a wireless network having at least one slow or unreliable link. In preferred embodiments, the helper station system includes at least one helper station configured to wirelessly re-transmit an original wireless transmission from at least one sender station to at least one access point without having to re-contend for access to the wireless medium.

Collaborative communication for wireless local area networks

A Multi-Interface Mobility Management (MIMM) client is provided on a mobile Multi-Interface Device (MID) to support seamless network connectivity and switching of the MID. The MIMM client communicates with a MIMM Server. The MIMM Server collects information from MIMM Clients and provides information to the MIMM Clients pertaining to the network(s) to which the mobile MID has access, such as information concerning the availability of a network, the quality of network connectivity, etc. The MIMM Client is responsible for determining whether and when a handoff or roaming operation should be initiated by the mobile MID, and which network interface the mobile MID should use after the handoff/roam operation has been completed. The MIMM Client also is responsible for performing mobility-related functions that are required prior and subsequent to the handoff/roam operation. The MIMM Client uses the information received from the MIMM Server in order to make these determinations.

Seamless network interface selection, handoff and management in multi-IP network interface mobile devices

In some embodiments, a system and method is disclosed for, among other things, reducing interference in a first wireless network from a second wireless network. In some embodiments, the method includes that an Interfered AP, which Interfered AP either itself receives interference or has a station in the Interfered AP's network that receives interference from an Interfering AP or from a station within the Interfering AP's network, selects how to reduce interference from a plurality of interference reduction methods&#x2014;e.g., including transmit power control (TPC), channel switching (CS) and/or the like.

Access point interference control and selection methods

Aspects of the invention provide a method and system for managing or coordinating data transmission in a Local Area Network (LAN) such that Quality of Service (QoS) concerns are met. A LAN resource manager (LRM) is provided for managing the LAN resources by providing solutions for providing users with several levels of QoS. Once the LRM admits a user at a certain QoS level, the level is assured within the LAN for as long as the user is in the LAN. A user may submit a request to transmit data to the LRM. The LRM may determine if time allocation is possible and allocate the time slots for data transmission. The LRM may send time slot allocation information to an Access Server in a LAN, which may inform the user of the time slot allocation and prepare a queue according to the slot allocation information.

Local area network resource manager

A method and system for dynamic forward assignment of IP addresses in a wireless network wherein a serving base station requests IP addresses of it neighboring cells. The serving base station then provides the requested IP addresses to the mobile stations it serves based on whether the mobile station will be entering a particular neighboring cell. Immediately upon entering the neighboring cell the mobile station establishes over the air communications with the neighboring cell's base station using one of the requested addresses. In another embodiment of the present invention each mobile unit is responsible for attaining IP addresses from the base stations of neighboring cells. Accordingly, the base stations serve as relay points for the IP address requests from the mobile unit to an address server.

Dynamic forward assignment of internet protocol addresses in wireless networks

A method of controlling a communication network including VC exchange nodes and VP exchange nodes such that the cell flow of each VP can be maintained within the prescribed characteristic while the end-to-end cell transfer quality for VCs can be estimated easily and accurately. In the network, a cell transfer from the VC exchange nodes to the VP exchange nodes is controlled within prescribed traffic characteristics specified to VPs; a cell transfer quality at each of the VC exchange node is specified in terms of a first cell transfer quality dependent on the control of the cell transfer, and a second cell transfer quality independent on the control of the cell transfer: a cell transfer quality at each of the VP exchange node is specified by a third cell transfer quality independent on the control of the cell transfer alone; an end-to-end cell transfer quality for each VC in the network is estimated in terms of the cell transfer quality of each of the VC exchange nodes and the cell transfer quality of each of the VP exchange nodes: and the bandwidth management in the network is carried out such that the estimated end-to-end cell transfer quality becomes higher than a desired quality of service.

Method of controlling communication network incorporating virtual

A broadband switching network for transmitting information by using a cell composed of an information field and a header, including a first network comprising an ATM ring having a plurality of access nodes for multiplexing and demultiplexing the cell and a ring shape transmission path for connecting the plurality of access nodes in a ring shape so as to transmit the cell, and at least one second network, wherein the first network being connected to at least one second network via one of the plurality of access nodes, each second network having a switching function for switching the cell.

Growing community of inventors

Morristown, NJ, United States of America

Toshikazu Kodama