At+t Corp.

At&t Intellectual Property I, L.p.

Alcatel-lucent USA Inc.

Lucent Technologies Inc.

Other

Chanyu Holdings, LLC

Kin K Leung

Hujun Yin

Byoung-Jo J Kim

Zoran Kostic

Paul Shala Henry

Hui Luo

Nemmara K Shankaranarayanan

Zhimei Jiang

Thierry E Klein

Xiaoxin Qiu

Li-Chun Wang

Leonard Joseph Cimini, Jr

Herman Chien

Haitao Zheng

Kapil K Chawla

Peter Frank Driessen

Justin Che-I Chuang

Jin-Meng Ho

Harish Viswanathan

Louis Gwyn Samuel

Sayandev Mukherjee

Liang A Hong

Suman Das

George Endicott Rittenhouse

Jack Winters

Elliott Hoole

Ganapathy Subramanian Sundaram

Srinivas R Kadaba

Gabriel Gary Schlanger

Thomas K Fong

Arty Srivastava

Leonard Joseph Cimini

Sanjiv Nanda

Mark Jeffrey Foladare

Shelley Betty Goldman

David Phillip Silverman

Bruce E McNair

Hamid Reza Karimi

David James Houck, Jr

Yzhak Ronen

Ward Whitt

Peter M Winkler

Mark Haner

Alexandr Kuzminskiy

Gagan Lal Choudhury

Eliott Hoole

Kwan L Yeung

A method and apparatus to enable IP networking for mobile hosts without requiring changes to be made to the TCP/IP stack in the operating system installed on the mobile hosts. The apparatus is an 'intelligent device' that can be installed on or connected to a mobile host, and may comprise a software-only logical module, physical hardware, or a combination of both. To a mobile host, the intelligent device emulates a network interface such as an Ethernet card or a telephone modem. The intelligent device appears to an access network just like any regular IP host connected to the access network through a physical network interface device. The intelligent device handles all mobile networking functions for the mobile host, and may control multiple different physical network interface devices to enable a connection to an access network available to the mobile user at his location.

Layer-2 IP networking method and apparatus for mobile hosts

A network having distribution of access point loading includes access points to which mobile stations can associate themselves based upon access point beacon signal levels and loading levels for the various access points. A mobile station receives beacon signals from various access points and determines a signal strength for the received beacon signals. The mobile station also receives access point loading information from the access points. The mobile station associates with an access point based upon the access point beacon signal strengths and the access point loading information.

WLAN having load balancing based on access point loading

The invention provides a system that implements an algorithm for integrated link adaptation and power control to achieve specified error rates and to improve an overall throughput for real-time applications in wireless packet networks. The system initially divides wireless terminals into groups according to their signal path gains. Afterwards, the system can periodically adapt transmissions (i.e., link adaptations) based on the required error rates, actual error statistics and average transmission power for each wireless terminal group. Furthermore, transmission power can be adjusted by an enhanced Kalman-filter method to ensure successful reception.

Method and system for integrated link adaptation and power control to improve error and throughput performance in wireless packet networks

A method for improving the performance for a streaming service by link-adaptation and power-control in a wireless packet network such as an Enhanced General Packet Radio Services (EGPRS) cellular network is described. In particular, the effects of a combined link adaptation and power control scheme (referred to as an error-based scheme) for achieving a target error rate, which is non-zero but low enough so that limited retransmission and error concealment techniques are effective, is presented.

Method of using link adaptation and power control for streaming services in wireless networks

A method and apparatus to enable IP networking for mobile hosts without requiring changes to be made to the TCP/IP stack in the operating system installed on the mobile hosts. The apparatus is an 'intelligent device' that can be installed on or connected to a mobile host, and may comprise a software-only logical module, physical hardware, or a combination of both. To a mobile host, the intelligent device emulates a network interface such as an Ethernet card or a telephone modem. The intelligent device appears to an access network just like any regular IP host connected to the access network through a physical network interface device. The intelligent device handles all mobile networking functions for the mobile host, and may control multiple different physical network interface devices to enable a connection to the 'best' access network available to the mobile user at his location.

A system and method for predicting future interference power in packet-switched networks is disclosed, allowing improved performance in such networks via optimized link adaptation and power control. In an embodiment for use in a cellular network, Kalman filtering can be used to provide the interference estimation through identification of the number of active co-channel interferers in the cellular networks and correlation of the interference power with the number of active interferers. A two-dimensional Kalman filter can be used to exploit that correlation to enhance prediction accuracy. In an alternative embodiment, a one-dimensional Kalman filter can be used where the number of active interferers is not considered.

System and method for estimating interference in a packet-based wireless network

A method for setting and adjusting MAC fragmentation threshold for IEEE 802.11 networks operating at different data rates is presented. The fragmentation threshold is adjusted based on throughput performance, delay constraints and hidden node influence.

Adaptive MAC fragmentation and rate selection for 802.11 wireless networks

A network includes access points that admit/terminate mobile station associations based upon the loading level of the access point and/or whether a mobile station can associate with a further access point. Mobile stations transmit information indicative of the access points to which they can associate. The access points determine whether to admit/terminate a mobile station association based upon access point loading.

WLAN having load balancing by access point admission/termination

An IP-based corporate network architecture and method for providing seamless secure mobile networking across office WLAN, home WLAN, public WLAN, and 2.5 G/3 G cellular networks for corporate wireless data users. The system includes Internet roaming clients (IRCs), a secure mobility gateway (SMG), optional secure IP access (SIA) gateways, and a virtual single account (VSA) server. The IRC is a special client tool installed on a mobile computer (laptop or PDA) equipped with a WLAN adaptor and a cellular modem. It is responsible for establishing and maintaining a mobile IPsec tunnel between the mobile computer and a corporate intranet. The SMG is a mobile IPsec gateway installed between the corporate intranet and the Internet. It works in conjunction with the IRC to maintain the mobile IPsec tunnel when the mobile computer is connected on the Internet via a home WLAN, a public WLAN, or a cellular network. The SIA gateway is a special IPsec gateway installed in the middle of the wired corporate intranet and an office WLAN. It works with the IRC to ensure data security and efficient use of corporate IP addresses when the mobile computer is connected to the office WLAN. The VSA server manages authentication credentials for every corporate user based on a virtual single account concept. The Internet Roaming system can provide secure, always-on office network connectivity for corporate users no matter where they are located using best available wireless networks.

System and method to support networking functions for mobile hosts that access multiple networks

Growing community of inventors

Edison, NJ, United States of America

Kin K Leung