Abstract: The present invention provides phthalate free impact resistant polypropylene copolymer and methods of preparation, which are produced directly from the polymerization reactor system without further compounding of components which significantly alters the physical properties of the resulting polymer. The copolymer according to the present invention possesses both low temperature ductility and high flexural modulus, wherein said polymer is produced in the presence of a phthalate free ZN catalyst comprising urea component.

Abstract: Disclosed is a Ziegler-Natta catalyst composition comprising one or more Ziegler-Natta procatalyst compositions which comprise magnesium, titanium, a halogen, one or more internal electron donors; one or more aluminum containing cocatalysts; optionally one or more stereo-selectivity control agents (SCA); and one or more activity limiting agents (ALA) comprising one or more alkyl-, cycloalkyl- or aryl carbonates and derivatives. Such a Ziegler-Natta catalyst composition exhibits self-limiting catalyst activity in olefin polymerization, particularly propylene polymerization.

Abstract: The present invention provides a method and apparatus for network access for consumers in both wired and wireless environments. Multiple-interface/multiple-connections are used to support high-speed handoff and seamless roaming between different networks (wired and wireless). The present invention is implemented by using multiple interfaces and connections to interface a mobile PC unit, providing additional functions, and enhancing current PC device drivers and software.

Abstract: Various types of information from a wireless communications network, including E911 location information, Hand Off (HO) information, and Power information, as well as other Measurements and System Parameters, are collected and analyzed by a Data Collection and Filtering system, and the results of this analysis are provided to a Network Control system to dynamically control the operation of the wireless communications network. The various optimizations that can be performed by the Network Control system include: (1) dynamically allocating radio frequency (RF) signal power, (2) setting dynamic dedicated handoff (HO) thresholds for individual mobile transceivers; and (3) intelligently forming or steering radio frequency (RF) signal beams.

Abstract: Various types of information from a wireless communications network, including E911 location information, Hand Off (HO) information, and Power information, as well as other Measurements and System Parameters, are collected and analyzed by a Data Collection and Filtering system, and the results of this analysis are provided to a Network Control system to dynamically control the operation of the wireless communications network. The various optimizations that can be performed by the Network Control system include: (1) dynamically allocating radio frequency (RF) signal power, (2) setting dynamic dedicated handoff (HO) thresholds for individual mobile transceivers; and (3) intelligently forming or steering radio frequency (RF) signal beams.

Abstract: A and collects provides various types of information therefrom, including E911 location information, Hand Off (HO) information, and Power information, as well as other Measurements and System Parameters. This information is analyzed by a Data Collection and Filtering system and the results of this analysis are provided to a Network Control system to dynamically control the operation of the wireless network. The various optimizations that can be achieved include: (1) dynamically allocating radio frequency (RF) signal power in the wireless network, (2) setting dynamic dedicated handoff (HO) thresholds for individual mobile transceivers; and (3) intelligently forming or steering radio frequency (RF) signal beams. Moreover, the collected and analyzed information can be used to identify and resolve problems in the wireless network, especially when the identified problems are correlating with E911 location information.

Abstract: Vocoding conversions are reduced by dynamically loading a software-defined vocoder into a handset. The software-defined vocoder may be selected based on the calling party's network type, wherein a notification of network type is transmitted to the called party's network during call setup. The software-defined vocoders may be stored in the network and downloaded into the handset; alternatively, the software-defined vocoders may be stored in the handset. Voice data is tunneled from the calling party's handset and the calling party's network, through any number of different networks, to the called party's network and called party's handset, without any vocoding conversions, except at the handsets.

Abstract: Various techniques ate present for enhancing the quality of service on wireless communications systems. These techniques determine when errors occur in transmitted frames, then apply Bit Error Rate Power Control, Power-Based Re-Transmission, and Sub-Frame Selective Repeat methods to these errors. Consequently, the handling of frame errors consumes fewer resources in the wireless communications systems.

Abstract: Bluetooth networks, also known as wireless local loop, are integrated with cellular networks, so that the two networks can inter-operate with devices enabled for both types of networks.

Abstract: A method for tunneling voice over the Internet Protocol (IP) in a cellular network. A Mobile Identification Number (MIN) of a non-IP-enabled handset is mapped to the IP address of a component of a cellular network in communication with that handset. A sub-index is assigned to the handset by the component, wherein the sub-index acts as an extension to the IP Address of the component, so that a non-IP-enabled handset can be correctly identified within the cellular network.

Abstract: A method and apparatus for controlling communications between a mobile cellular telephone and a cell of a cellular telephone network. The apparatus comprises a serving transceiver for transmitting and receiving communications between the cell and the mobile cellular telephone, a scanner, coupled to an antenna, for selectably scanning the communication channels to measure a characteristic of the signal transmitted from the mobile telephone, and a controller, coupled to the scanner and the serving transceiver, for commanding the antenna based on the measured signal characteristic.

Abstract: Stack up type low capacitance overvoltage protective device is composed of a substrate; a conductive low electrode layer formed on the substrate; a voltage sensitive material layer formed on the conductive lower electrode layer; and a conductive upper electrode layer formed on the voltage sensitive material layer.

Abstract: A computer-implemented modeling tool for wireless communications systems predicts signal strength by considering the effects of water on RF signals. The modeling tool creates a model of the RF signals' propagation between a transmitter and a receiver in the wireless communications system. The modeling tool then determines the effect of at least one body of water located between the transmitter and the receiver on the modeled RF signal's propagation. Thereafter, the modeling tool outputs a signal strength value for the modeled RF signal based on the determined effect from the body of water located between the transmitter and receiver.

Abstract: Vocoding conversions are reduced by dynamically loading a software-defined vocoder into a handset. The software-defined vocoder may be selected based on the calling party's network type, wherein a notification of network type is transmitted to the called party's network during call setup. The software-defined vocoders may be stored in the network and downloaded into the handset; alternatively, the software-defined vocoders may be stored in the handset. Voice data is tunneled from the calling party's handset and the calling party's network, through any number of different networks, to the called party's network and called party's handset, without any vocoding conversions, except at the handsets.

Abstract: A method of fabricating self-aligned multilevel mask read only memory (ROM). The method can improve the process window to reduce process difficulty by utilizing the self-aligned implantation. Moreover, by utilizing the connection between the word line and the gate and implantation of the ROM code with self-aligned implatiation to increase the difference between the threshold voltages of different gates, and therefore, multilevel cell transistors with for the mask ROM with multilevel threshold voltages are formed to times the capacity of the mask ROM.

Abstract: Various techniques ate present for enhancing the quality of service on wireless communications systems. These techniques determine when errors occur in transmitted frames, then apply Bit Error Rate Power Control, Power-Based Re-Transmission, and Sub-Frame Selective Repeat methods to these errors. Consequently, the handling of frame errors consumes fewer resources in the wireless communications systems.

Abstract: A cellular telephone system is described of the type wherein a plurality of contiguous cells, each having an assigned set of identification codes, are arranged with means for maintaining continuous communication with mobile telephones moving from cell to cell. The system allows multiple access by including means for assigning at least one of the in the assigned set of identification codes to more than one mobile telephone. A unique identification code is assigned to a mobile telephone located in the cell. A signal having a unique identification code is generated for identifying the mobile telephone. The signal is coupled to the zones. A combiner is also provided for combining signals from all of the zones in the cell. A receiver is coupled to the combiner for retrieving the signals having the code.

Abstract: A method and apparatus for apparatus for controlling communications between a mobile cellular telephone and a cell of a cellular telephone network. The apparatus comprises a serving transceiver for transmitting and receiving communications between the cell and the mobile cellular telephone, a scanner, coupled to an antenna, for selectably scanning the communication channels to measure a characteristic of the signal transmitted from the mobile telephone, and a controller, coupled to the scanner and the serving transceiver, for commanding the antenna based on the measured signal characteristic.

Abstract: Method and apparatus to prevaporize and premix liquid and/or gaseous fuels with air in two stages at two different temperatures prior to combustion. The invention is directed to the entry of a finely atomized liquid fuel, such as No. 2 diesel, into an inlet end of an annular chamber. Air is mixed with finely atomized liquid fuel, preferably generated by a small flow number liquid fuel nozzle, in a first chamber of the annular chamber at a first (relatively high) temperature for a relatively long residence time. The air and liquid fuel is moved into a second chamber of the annular chamber where a secondary hotter air is injected into the annular chamber by a plurality of staggered high velocity jets to prevaporize and premix the combined fuel and air mixture at a second higher temperature, but for a shorter time. The intense prevaporization and premixing make the mixture suitable for entry into a combustor, but without the need to add water or steam to keep pollutant emissions low.

Abstract: A cellular telephone system is described of the type wherein a plurality of contiguous cells, each having an assigned set of identification codes, are arranged with means for maintaining continuous communication with mobile telephones moving from cell to cell. The system allows multiple access by including means for assigning at least one of the in the assigned set of identification codes to more than one mobile telephone. A unique identification code is assigned to a mobile telephone located in the cell. A signal having a unique identification code is generated for identifying the mobile telephone. The signal is coupled to the zones. A combiner is also provided for combining signals from all of the zones in the cell. A receiver is coupled to the combiner for retrieving the signals having the code.