Abstract: A communication device (11) is provided with a microprocessor (15) and a memory storage device (13). A battery (14) associated with the communication device 11 is provided with memory 16. The memory storage device and the memory contain values relevant to the manufacturing of each device, respectively. The microprocessor reads the memory storage device and the memory and makes a determination of whether the communication device, the battery, and the combination thereof are intrinsically safe to be used in a hazardous environment, and presents the results to a user.

Abstract: A wireless domain (602) sets a security policy for all mobile communication devices (606) within the domain by use of a system entry proxy server (604). A developer makes an application or code segment available at a developer station (600). The application is certified by a certificate defining a developer security setting. The user of the mobile communication device initiates a download of the application so that it can be installed onto the mobile communication device. The application is downloaded through the system entry proxy server which authenticates the application, then re-certifies it with a compact certificate including an operator defined security policy. In this way the operator can control which resources of the mobile communication device are accessed by all applications coming into the wireless domain.

Abstract: A signed application descriptor file (206) is used instead of X.509 certificates to authenticate a portable application code, such as a JAVA archive (JAR) file. The signed ADF includes an application descriptor file (302), file hash (304) of the JAR file (301), a developer descriptor file (308), signed time stamp (310), and a developer's certificate (312). A network client device (202) includes limited computing resources (212) and a virtual machine environment for executing the portable code (208). Furthermore the client device contains a set of cryptographic, digital keys for authenticating parts of the signed ADF, which are further used to authenticate the JAR file.

Abstract: The invention relates to a system and method for use in wireless packet data mode communications for enabling communication between a source device (102a) and one or more target devices (102b) with a reduced set-up time. The invention captures in a control structure (600), one or more communication parameters (602-608) during the set up of the source device (102) and a base station (106). Then the control structure (600) is transmitted to the one or more target devices (102b) during the period of the source device's (102a) configuration and is utilized to configure the one or more target devices (102b) to communicate with the source device (102a) via the base station (106), thus reducing the total time required to set-up the communications.

Abstract: A radio transceiver (100) has both a radio frequency power amplifier (102) and a relatively high output audio power amplifier (110). The RFPA amplifies a linearly modulated signal. A shared power regulator (108) provides supply voltage to both amplifiers at the same time. However, usually only one is active at any given time, and hence the supply voltage is controlled so as to follow the envelope of the signal being amplified, whether it is the transmit signal or the audio signal. When both amplifiers are active, the supply voltage can be set to a fixed level, or it can follow the higher of the two envelopes.

Abstract: A frequency management scheme for a hybrid cellular/GPS or other device generates a local clock signal for the communications portion of the device, using a crystal oscillator or other part. The oscillator output may be corrected by way of an automatic frequency control (AFC) circuit or software, to drive the frequency of that clock signal to a higher accuracy. Besides being delivered to the cellular or other communications portion of the hybrid device, the compensated clock signal may also be delivered to a comparator to measure the offset between the cellular oscillator and the GPS oscillator. The error in the cellular oscillator may be measured from the AFC operation in the cellular portion of the device. An undershoot or overshoot in the delta between the two oscillators may thus be deduced to be due to bias in the GPS oscillator, whose value may then be determined.

Abstract: A fixed wireless terminal utilizes a method for accessing a wireless local loop (WLL) telephone network to provide both a diagnostic mode of operation and a digital data delivery mode of operation in a system which utilizes a protocol which provides support for only the digital data delivery mode of operation. The method includes setting up a call to a WLL device which includes a mobile station and a communication interface. The mobile station receives call setup signals followed optionally by a predetermined guard time. The communication interface is responsive to a predetermined guard time for switching to a diagnostic mode, and in the absence of the predetermined guard time being transmitted, the communication interface maintains the digital data delivery mode.

Abstract: A mobile communication device (100) determines a background noise level at a microphone (104). If, after determining the noise floor, the input signal exceeds a threshold, the mobile communication device transmits the input signal. The threshold is established such that if it is exceeded, it is likely that voice energy is being received at the microphone, and the threshold, in a first embodiment, is increased as the background noise level increases. In a second embodiment the threshold is determined as the difference between the input signal and the background noise level. As background noise increases, the threshold actually decreases.

Abstract: A mobile communication device has a radio contact (110) that has a moveable portion (111) that is located in correspondence with a contact pad (106) of a circuit board of the (104) of the mobile communication device. The moveable portion is biased away form the contact pad. The radio contact is held in place by a boot (116) that is attached to the housing of the mobile communication device. An external connector has a connector contact (206) that has a moveable portion (210) for mating with the moveable portion of the radio contact. As the external connector is attached to the mobile communication device, the connector contact pushes the radio contact until it touches the contact pad, and then the moveable portion of the connector contact move to absorb any further travel of the external connector.

Abstract: A hinge assembly (2100) includes a hinge body (2102) made of two hinge body halves (900). Each hinge body half is identical so that only one part need be manufactured, and two of them used to form the hinge body. Each hinge body half has a first leg (902) that is longer than a second leg (904). The first leg has a retaining lip (912) at the end which forms a retaining feature. Each leg of the hinge body defines an axis of rotation for the body elements (104, 106). A portion (1508) of a flexible circuit board (1506) is captured between the hinge body halves so as to electrically interconnect circuitry placed in each body element. A detent mechanism is provided to hold the body element in preselected positions with respect to each other, and includes a spring (2106), a cam (2108) and a cap (2110) having cam follower features (2118). The cam is held in place with respect to the body element housing, while the cap is fixed in position with respect to the hinge body.

Abstract: A system and method is provided for generating a second LO signal to a second mixer of a plurality of receivers employed in a multimode communication device. A single PLO and VCO provides a high frequency second LO signal that is divided by divider components to provide a number of lower frequency second LO signals. The different high frequency second LO signal and the number of lower frequency second LO signals may be utilized for providing second LO signals for component employed in receiving communications from radio devices employing different communication standards and/or frequency ranges.

Abstract: A communication device (100, 200) capable of transmitting information provides the means for regulating the temperature (116) of one or more heat-sensitive modules or components (160) of the communication device through the adaptive and dynamic control of the flow of transmissions by the communication device, thereby eliminating the need for stored thermal profiles of heat-sensitive modules of the communication device. In addition to the heat-sensitive module(s), the communication device has a multi-logic controller block (110) and a transmission flow control block (140). The multi-logic controller block (110) receives the temperature of the heat-sensitive module (116) and a first control clock (112) and utilizes multi-value logic to generate a flow control signal having hysteresis (126).

Abstract: A mobile communication device (100) contains a memory (110), a controller (112) and transceiver components (120, 122, 124, 126). When an incoming call signal is received (314), the controller compares the source identifier with various lists (210, 240, 270) stored in the memory. If the source identifier is contained on a rejection list, the call is rejected. If the source identifier is contained on an acceptance list, the call is received normally, unless a do not disturb feature is active. The lists may be fixed or selectable. Selectable lists are configurable by the user of the mobile communication device, whereas fixed list types cannot be changed by the user of the mobile communication device.

Abstract: A monitoring subroutine is embedded within a package that provides no other client services other than the monitoring functionality itself. Because of this, the monitoring package can be shut down at any time without affecting any other system services or packages. The inventive concept is realized by providing one monitor package for each type of package running on a server; the one monitor package running on the same server. Also, this invention provides a communication mechanism between the monitoring subroutine and the packages whose services are being monitored. This is necessary to provide the monitoring subroutine a real time view of the resources being provided by all of the packages as a whole. To accomplish this, a state table is provided for all packages of the same type running or pending on a given node and similar monitor state tables are provided for other nodes. In this implementation, the standard packages just make one-time changes to the system resources.

Abstract: A global positioning system (GPS) receiver (102) has a reference oscillator (114) for use in synthesizing signals for use in receiving and acquiring GPS satellite signals by a GPS downconverter (110). Upon manufacture of the receiver (204), the receiver is tested and a factory frequency offset of the oscillator is determined (206). It has been found that the heat used in reflowing the solder used to attach receiver components causes the operating frequency of oscillator devices, such as crystals, to shift considerably. In addition, during a brief period after manufacture of the receiver, the frequency of the oscillator shifts back towards its original operating frequency, and so much so that the narrow search window used to search for a GPS carrier is inadequate, and it is likely that the receiver would not locate the desired carrier signal.

Abstract: A speakerphone arbitration method is used to eliminate the effects of echo in imperfect telephone circuits. The method assumes that speech energy received at the speaker phone is an echo, unless the speech energy has characteristics that indicate it is not echo, such as the duration of the speech energy, and the time at which the speech energy is received relative to the time when the user of the speakerphone finishes speaking, or pauses while speaking. The method also may allow arbitration if the speech energy is more energetic than a typical echo, regardless of the duration or time when it is received.

Abstract: A power supply that is compatible with a portable electric or electronic device is provided with a current sensing circuit. When the current exceeds a threshold level in response to the device intentionally changing its current demand, the power supply changes its voltage output level. The voltage change indicates to the device the power supply is a compatible power supply, and indicates the user of the device the power supply is compatible.

Abstract: A communications system infrastructure (100), such as an integrated services radio system, is provided with a hold processor (126). The hold processor is operably coupled to at least one base station controller (114). If a mobile subscriber unit (102) is actively engaged in a first communication service, such as a telephone interconnect call, and desires to use a second communication service, such as making or responding to a dispatch call, the mobile subscriber unit request the first service to be held. The base station controller then switches the first service to the hold server, which in turn generates an identifier for transmittal to the mobile subscriber unit for storage and call retrieval at a later time.

Abstract: An integrated antenna and input device is provided that includes an antenna for transmitting and/or receiving electronic signals, and strain sensing elements coupled to the antenna. The strain sensing elements detect directional movement of the antenna. Additionally, an electronic communication device is provided. The device includes a graphical display, a control circuit, an antenna, and at least one sensor. The control circuit displays information on the graphical display, and the antenna transmits and/or receives electronic signals. The sensor is coupled to the antenna and the control circuit, and relays directional movement of the antenna to the control circuit to navigate the displayed information or select specific functions of the communication device.

Abstract: A user who desires to establish a temporary talk group first requests a temporary group identifier, then the user specifies the talk group membership and a validity period. The temporary talk group can be set up using a mobile communication device, or by use of a computer which connects with a service provider's server over the Internet.