At+t Corp.

At&t Intellectual Property I, L.p.

Lucent Technologies Inc.

Other

American Telephone and Telegraph, Co.

Salman Yousef Abbasi

Irwin Gerszberg

Farhad Barzegar

Zafer Sahinoglu

Vijay K Bhagavath

Jackson Odondi

Jeffrey S Martin

Thomas Mark Oplinger

Jesse Eugene Russell

Scott Mollica

Jeremiah A Okoro

Eugene Thomas Kendig

Thomas T Shen

Richard F Pace

Eugene T Kendig

Srini Ramamurthy

Thomas Wilmer Hill

Thomas Gerard Gvoth

Albert Benzimra

Scott Joseph Mollica

Jeffrey Stephen Martin

A method and apparatus to manage network address for private voice communication are described.

Method and apparatus to manage network addresses for private voice communications

A machine-readable medium, a system, and an apparatus are provided for increasing a data transmission rate. A window size is established, where the window size is an indicator of an amount of data a terminal can receive. Data segments are received in accordance with the window size. An error condition of the data segments over a specified time period is measured. The window size of the data terminal is changed based on the error condition.

Methods and systems for improving data transmission rates having adaptive protocols

Methods and systems are provided to improve the data transmission rate of a system executing an network protocol such as TCP, by adapting the protocol according to an error rate of the system. The technique includes first establishing a connection between a receiver and transmitter according to the network protocol including establishing a data window size, the window size being an indicator of the amount of data the receiver can receive. As data segments are received, the receiver counts the number of data segments received as well the number of errored octets produced by the physical layer of the network over specified time periods. For each time period, the receiver determines whether the window size of the receiver should be changed to improve the data communication rate based on the previous window size, the number of segments received and the number of errors measured. If the window size is changed, then the receiver reestablishes communication with the transmitter using the new window size, thus altering the network protocol to optimize the overall data transmission rate.

A system and method in which a dual image-reject mixer arrangement receives an RF signal having at least one channel. The dual image-reject mixer arrangement generates first and second signals corresponding to each channel of the RF signal. Each first and second signal includes a desired signal, an image frequency signal and an intermodulation signal. A feed-forward arrangement receives the first and second signals corresponding to each channel and outputs a third signal that is formed by constructively combining the desired signals corresponding to each channel and substantially cancelling the intermodulation signals corresponding to each channel. An in-phase and quadrature hybrid network receives the third signal and outputs an in-phase baseband signal and a quadrature baseband signal corresponding to each channel of the RF signal. A controller is coupled to the dual image-reject mixer arrangement and monitors the first and second signals, and controls an amplitude and a phase of the image frequency signals so that the image frequency signals are collectively minimized based on the monitored first and second signals. The controller is also coupled to the feed-forward arrangement and monitors the third signal. Based on the monitored third signals, the controller controls the amplitude and the phase of the intermodulation signals so that the intermodulation signals are collectively optimally cancelled.

Dual image-reject mixer receiver for multiple channel reception and processing

An intelligent wireless communication base station provides communication between individual base stations over an RF radio channel. A control unit in each base station utilizes this communication to facilitate each base station to gather system data regarding the system arrangement of nearby base stations and to facilitate handovers of mobile wireless personal communicators from one base station to a another base station. This control unit is under stored program control and gathers information concerning set up channels of nearby radio ports, a developed list or table of neighbor base stations and signal strength values of nearby channels. Voice channels may be bridged allowing two personal communicators to communicate with each other through a single base station.

Wireless communication base station

In a wireless communication network a method for locating and tracking status of a plurality of radio ports comprises the steps of: determining a coordinate position of one of the plurality of radio ports; and transmitting the coordinate position to a control center. The method can further comprise the step of removably-interfacing a GPS receiver to one of the plurality of radio ports. Transmitting the coordinate position to the control center can utilize a wired connection. Additionally, the coordinate position can be stored at the control center. The coordinate position is integrated into a map of the plurality of radio ports. A nonresponsive radio port can be identified by a corresponding coordinate position and the wireless network traffic can be routed appropriately.

GPS downloadable interface locator

A microcell unit, in a cellular telephone system using digital signal processing BSs, is digitally connected to a macrocell, via a metallic link, such as a twisted pair. The microcell includes a plurality of radio channel units (RCU), to provide voice connectivity to mobile subscribers (MS), which are under control of a radio control complex (RCC) located in the macrocell. Several time slots of the macrocell TDM bus, through which the RCC exerts control of the RCUs, are remoted to the microcell thereby enabling control of the RCUs at the microcell location by the RCC of the macrocell. This remoting action is achieved, via a remote time division multiplex (TDM) circuit pack which enables the RCC to communicate with the RCUs as if they were located within the macrocell.

Metallic macrocell/microcell interface

Growing community of inventors

Clifton, NJ, United States of America

Salman Yousef Abbasi