Motorola

About: Motorola is a company organization based out in Schaumburg, Illinois, United States. It is known for research contribution in the topics: Signal & Communications system. The organization has 27298 authors who have published 38274 publications receiving 968710 citations. The organization is also known as: Motorola, Inc. & Galvin Manufacturing Corporation.

Trunked communication system with nationwide roaming capability

Abstract: Selected regional trunking systems are equipped with telephone interconnect capability and provided with local computers (106), which communicate with a national hub computer (110). At each selected trunking system, several IDs are reserved as ''roaming IDs'' to be temporarily assigned to roaming subscribers (112). When a subscriber determines that it has roamed into a new trunked system, it requests a roaming ID. A roaming ID is assigned and transmitted to the subscriber, which thereafter operates within the new trunked system using its roaming ID. The roaming assignment is also transmitted to the national hub computer (110) so that interconnect calls may be appropriately properly forwarded. The roaming subscriber (112) continues to operate under the assigned roaming ID until it roams out of the range of the current system and into yet another trunked system. In this way, the subscribers may roam from system to system.

Communications system with radio device and server

Abstract: A communications system having a first server (205) with an electronic mail (e-mail) database for managing e-mail accounts, for storing radio device addresses associated with those accounts, and for storing electronic mail messages associated with those accounts. Each message has a header and text. A gateway connects the first server to a two-way radio network. A radio device (200) has a electronic messaging application. The radio device is capable of two-way communication over the two-way radio network. The first server comprises message handling software arranged to send, to the radio device, a portion of a message of a predetermined size, including a header portion and a text portion. The radio device (200) can request more of a message.

WTCP: a reliable transport protocol for wireless wide-area networks

Abstract: Wireless wide-area networks (WWANs) are characterized by very low and variable bandwidths, very high and variable delays, significant non-congestion related losses, asymmetric uplink and downlink channels, and occasional blackouts. Additionally, the majority of the latency in a WWAN connection is incurred over the wireless link. Under such operating conditions, most contemporary wireless TCP algorithms do not perform very well. In this paper, we present WTCP, a reliable transport protocol that addresses rate control and reliability over commercial WWAN networks such as CDPD. WTCP is rate-based, uses only end-to-end mechanisms, performs rate control at the receiver, and uses inter-packet delays as the primary metric for rate control. We have implemented and evaluated WTCP over the CDPD network, and also simulated it in the ns-2 simulator. Our results indicate that WTCP can improve on the performance of comparable algorithms such as TCP-NewReno, TCP-Vegas, and Snoop-TCP by between 20% to 200% for typical operating conditions.

Apparatus and Methods for Head Pose Estimation and Head Gesture Detection

Abstract: A method for head pose estimation may include receiving block motion vectors for a frame of video from a block motion estimator, selecting at least one block for analysis, determining an average motion vector for the at least one selected block, combining the average motion vectors over time (all past frames of video) to determine an accumulated average motion vector, estimating the orientation of a user's head in the video frame based on the accumulated average motion vector, and outputting at least one parameter indicative of the estimated orientation.

Radio frequency identification tag having a printed antenna and method

Abstract: A radio frequency identification tag (14) includes a radio frequency identification tag circuit chip (12) coupled to an antenna (10) including a conductive pattern (22) printed onto a substrate (16). The substrate may form a portion of an article, a package, a package container, a ticket, a waybill, a label and/or an identification badge. The conductive pattern includes a first coupling region (28) and a second coupling region (30) arranged for coupling to the radio frequency identification tag circuit chip. The first coupling region and the second coupling region are precisely located and isolated from one another via an aperture (31) formed in the substrate.