Abstract: A mobile phone housing top of the present invention comprises a main body and a front wall, a rear wall, a left wall and a right wall depending from the main body. The main body comprises a speaker section, a display section, and a keypad section including a function key section and a data key section. The data key section comprises a plurality of oblique recesses and a number of data key receiving openings respectively defined in the oblique recesses. The data key receiving openings are aligned with the oblique recesses while at the same time being arranged in a matrix which is conventional for mobile phone data keys. A protrusion is formed between adjacent oblique recesses.

Abstract: A retractor belt clip device which includes a retractable lead for a personal hands free kit or other similar device such as speaker leads for personal CD or tape device is disclosed. The device includes a receptacle body and corresponding flanged lug fastener which is attached to the mobile phone or like apparatus. The receptacle is adapted to be attached to a belt or the like by means of a clip means positioned on the receptacle body, wherein the body has an opening located at its top side portion into which the flange of said lug fastener is received with the lug fastener extending through a slot on said receptacle body communicating with the opening such that the mobile phone or like apparatus is positioned outside and adjacent the receptacle body when the lug fastener is received within the receptacle body. The device further includes a compartment in which a microphone and speaker lead on a spool is located, the spool being able to rotate thus releasing or retracting the lead when required.

Abstract: A radio information terminal comprises a radio unit, functioning as a proxy server to a portable computer when it is connected to the portable computer and unable to receive a control radio wave from a base station, and synchronizing information received from the portable computer with information of an original server via the base station when it comes to receive the control radio wave from the base station.

Abstract: A base station transmitter for a CDMA communication system which includes a superframe period of a sync channel, a plurality of first sync channel frames segmented from the superframe period, the first sync channel frames each having a first period, and a plurality of second sync channel frames segmented from the first sync channel frames, the second sync channel frames each having a second period, wherein sync channel signals are transmitted through the second sync channel frames. The base station transmitter comprises a circuit for generating the sync channel signals; and a channel spreader for channel spreading a sync channel signal in a leading sync channel frame out of the second sync channel frames in said each first sync channel frame with a first orthogonal code, and channel spreading sync channel signals in the remaining sync channel frames with a second orthogonal code.

Abstract: A re-registration authorization is attached to a registration request or data packet sent from a mobile node roaming on a foreign network. The mobile node requests registration with its home network in order to maintain communication with the Internet and maintain identification of the mobile node by its individual home address. Such registration has a limited lifetime, and the re-registration authorization attached to the registration request or other data packet authorizes an intermediate communication entity in the foreign network to re-register the mobile node, on behalf of the mobile node, with the mobile node's home network, if the communication traffic of the mobile node indicates that the mobile node is still roaming on the foreign network. The rate of error is reduced by significantly reducing the amount of transmissions sent from the mobile node, and power consumption of the typically battery-powered mobile unit is reduced, as well.

Abstract: The present invention addresses the need for an apparatus and method for providing a communication service to a communication unit (112) with acceptable audio quality, when a serving site (109) does not have sufficient resources. To obtain the required communication resources, base sites (106-108) whose wireless coverage areas overlap the serving base site are considered. Before selecting an alternate base site to provide the communication service, the present invention, in contrast to the prior art, determines whether the alternate base site is capable of providing the communication service to the communication unit with an acceptable level of quality. If it is, the alternate base site is selected to provide the communication service to the communication unit.

Abstract: A system and method of communications usage management for multiple networked devices such as cellular telephones in a telecommunications network. A management database is provided for storing communications attributes for at least one networked device. The stored communications usage attributes serve as criteria for regulating access of the networked devices to the system. The users of the devices may purchase a quantity of transferable units, such as usage minutes over the system network, with the units being redeemable for goods and/or services on the system, thus facilitating transfer of units between users. A user interface is provided as a system management device for accessing the management database to configure the communications usage attributes for defining the transfer and usage criteria. Communications usage software operable with the network devices computes usage times to provide an accounting of usage and regulation in accordance with the management database.

Abstract: The location of a mobile unit in the service area of a CDMA cellular telephone system is predicted from a spatial probability distribution that is generated over a region of sub-cells within the service area. The spatial distribution, and hence the predicted location, is updated sequentially based on RF measurements provided by the mobile unit through the use of a Bayesian-update method.

Abstract: A method and apparatus are disclosed for suppressing interference in a radio frequency (RF) communication system using active shielding techniques. An opposing neutralizing signal is applied to actively neutralize stray signals in a microwave communication environment. An interfering or stray signal is detected using a sensing antenna, and the opposing neutralizing signal is generated in response thereto. The opposing neutralizing signal is applied to a signal neutralizing shield to shield any desired components or devices. The opposing neutralizing signal is approximately 180 degrees out of phase, and of equal magnitude to the detected interfering signal. A phase shifter/null feedback device receives the detected stray signal, if any, and adaptively adjusts the phase and magnitude of the opposing neutralizing signal. In one embodiment, the phase shifter/null feedback device includes an integrator that generates a DC value that is proportional to the energy of the interfering signal.

Abstract: A cellular telephone having a global positioning system (GPS) receiver using a blended combination of GPS signals from GPS satellites and GPS pseudolites for determining a location. The cellular telephone includes a cellphone transceiver and a GPS receiver. The cellular transceiver receives wireless downlink cellphone signals from the cell site transceiver and transmits wireless uplink cellphone signals to the cell site transceiver. The cell site transceiver passes voice and data from the downlink and uplink cellphone signals within a local area into the worldwide network of telephone services. The GPS receiver receives satellite GPS signals from GPS satellites and pseudolite GPS signals from GPS pseudolites. The GPS pseudolites augment the GPS satellites for the local area by broadcasting pseudolite GPS signals having location-determination information with a format that is similar to the format in the satellite GPS signals.

Abstract: In a satellite communications system, where a user terminal 34 may wish to page more than one satellite 10 or more than one spot beam 30, and where the definition of a timeslot 38 for a paging channel 48 occurs a predetermined period after the sending of a broadcast burst 42, the possibility of sustained temporal collision between paging channels 48 between adjacent satellites 10 or adjacent spot beams 30 is avoided by periodically, progressively, and cyclically, moving the predetermined period.

Abstract: In a communications receiver for quadrature demodulation, a feedback technique for reducing the image response of the receiver. The communications receiver includes an I demodulator and a Q demodulator. A local oscillator (LO) signal is provided by a PLL to a quadrature LO generator that provides an LO_I signal to an I demodulator and an LO_Q signal to a Q demodulator. The LO_I and LO_Q signals are amplitude and phase-controlled versions of the LO signal. An image/signal ratio (I/S) detector detects the relative phase difference and the relative amplitude difference between the respective output terminals of the I demodulator and the Q demodulator and applies an amplitude control signal and a phase control signal to corresponding amplitude control and phase control inputs of the quadrature LO generator. The I/S detector calibrates the quadrature LO generator during the interstitial interval between the reception of data packets.

Abstract: In CDMA mobile communication systems, there are cases in which communications are interrupted with the local base station while the mobile station is searching for channels other than the communication channel. A method is offered of preventing loss of information due to interruptions in such a case. There are a first transmission step for transmitting signals from the mobile station to the base station at a transmission rate R1 and a transmission output level P1 (when the transmission output is p in FIG. 10C), a suspension step of suspending signal transmissions from the mobile station to the base station (when no transmission output power as shown in the same drawing), and a second transmission step of transmitting signals from the mobile station to the base station at a transmission rate R2 higher than the transmission rate R1 and a transmission output level P2 higher than the transmission output level P1 (when 2p in the same drawing).

Abstract: The power amplifier will be prevented from being damaged due to a reflected wave without the aid of any expensive isolator. There are disposed a power amplifier as well as a directional coupler provided between the power amplifier and an antenna, for detecting a reflected wave reflected from the antenna side on the power amplifier side in such a manner that when a level of the reflected wave exceeds a predetermined value, supply of power supply voltage applied to the power amplifier is cut off.

Abstract: A power amplifier load adjust system includes a power amplifier and a variable impedance network coupled to the output of the power amplifier. The variable impedance network presents a plurality of impedances to the output of the power amplifier responsive to a load control signal. A control circuit generates a transmit power command and a channel frequency command. Memory stores a plurality of control values as a function of output power and frequency. A processing circuit coupled to the variable impedance network, the control circuit, and the memory retrieves the plurality of control values and uses them to generate the load control signal in response to the transmit power command and the channel frequency command.

Abstract: One or more preferred call numbers are defined and managed for mobile subscribers. A destination number dialed with the call is compared to the preferred call numbers for the mobile subscriber. When the destination call number is identical to a preferred call number, the call charges are determined by a charging device in the mobile network in a different manner than the usual charge. The storing of the preferred call numbers can occur at the mobile station side in a mobile station or at the network side. Based on the subscriber-specific stipulation of preferred call numbers, mobile subscribers have the ability to select and define specific call destinations which are charged differently than other calls, for instance according to a more favorable fee schedule. This increases the flexibility of the mobile subscribers and network operators with respect to the scheduling of calling rates.

Abstract: Multiple-mode cellular radiotelephones use a wide bandwidth receiving mode while scanning for signals in a narrow bandwidth receiving mode. Thus, when it is desired to scan the received frequency band to search for the presence of narrowband signals, the wider receiver bandwidth is first selected. When significant signal energy is identified in the wider bandwidth, a further scan using the narrowband mode may then be provided in order to locate the narrow bandwidth channel containing the strongest signal. In another embodiment, the signals that are received in the wider bandwidth mode are digitized to obtain complex signal samples. The complex signal samples are then processed to determine energy in each of a plurality of narrower bandwidths corresponding to channels in the narrower bandwidth cellular radiotelephone standards.

Abstract: Method and apparatus are provided to prevent unneccessary execution of TCP/IP performance enhancing algorithms in a wireless communications network. The method includes monitoring acknowledgment message traffic between a sending unit and a receiving unit and preventing forwarding of an acknowledgment message to the sending unit when the acknowledgment message is a second duplicate acknowledgment message. The apparatus includes a first endpoint unit connected between a sending unit and a receiving unit. The first endpoint unit includes a monitor component to monitor acknowledgment message traffic between the sending unit and the receiving unit and a filter unit to prevent forwarding of a duplicate acknowledgment message to the sending unit until a predefined condition is met.

Abstract: A wireless communications system supports affinity groups of like minded individuals who wish to know locations of other members of the affinity group. The system supports members of the affinity group querying, through a mobile terminal for the location of a remote member of the affinity group as sensed by the remote member's mobile terminal. Rather than report raw geocoordinates, location place-name descriptions are defined by the members of the affinity group and shared amongst one another. Additionally, situational alarms may be generated in the event certain user defined criteria are met, such as two remote members of the affinity group being in close proximity to one another.

Abstract: A multiple access asynchronous network segment for providing network access to a plurality of end systems over a shared medium uplink to a satellite headend supported by a network controller, wherein the network controller allocates part of the uplink resource and the satellite headend allocates part of the uplink resource on a temporary basis in response to end systems making a new request for uplink resource. Also provided is a signalling system for use in a multiple access asynchronous network segment for providing network access to a plurality of end systems over a shared medium uplink to an intermediate. Also provided is an Integrated Addressing and packet Segmentation And Reassembly (IASAR) system for use in a multiple access asynchronous network segment for providing network access for a plurality of end systems to an intermediate system over a shared medium.