Abstract: A system and method for affecting the behavior of the transmitting UART that, in turn, results in an internal state change in the receiving UART. The present invention, upon detecting a PPP packet, flow controls the line, causing the transmitting UART to force a marking condition (that is, all ones) or idle state. This idle state enables the receiving UART to exit sampling mode and receive the remaining incoming data within the PPP packet in byte mode. The receiving UART, when operating in byte mode, automatically accounts for slew.

Abstract: A method, within a wireless communication system, and a wireless MT2 device which provide for the resynchronization of a PPP link on each one of a Um and Rm interface without affecting the other of the Um and Rm interface. When a handoff is performed, such that the communications of the mobile MT2 device is handed off to a new BS/MSC, the Um interface will undergo PPP configuration renegotiation without causing the Rm interface also to undergo PPP configuration renegotiation. Similarly, when the Rm interface undergoes PPP configuration renegotiation, the Um interface will not undergo PPP configuration renegotiation.

Abstract: A system and method for selecting from a plurality of data service options in a wireless communication system having mobile data service support. The system comprises a terminal device includes a terminal device for originating a call and transmitting and receiving data in accordance with a selected data service option. The terminal device includes a communications interface for inputting a sequence of one or more alpha-numeric characters representing an AT dial command string in order to originate the call and for including information that indicates the selected data service option. The system also includes a communication device, coupled to the terminal device, for interfacing with the wireless communication system and for sending signaling messages to the terminal device. The communication device receives the AT dial command string from the terminal device and examines the contents of the received AT dial command string.

Abstract: A system and method for accounting for clock slew during autobauding. Upon identifying an AT command and the baud rate of the incoming data stream, the present invention accounts for clock slew in one of two ways, depending upon the baud rate of the incoming data stream. If the baud rate of the incoming data stream is 9600 or greater, the present invention accounts for slew by utilizing a feature associated with ASCII characters and RS-232 protocol, that is the stop bit being nicely framed on both sides by spaces. This feature is used to determine whether negative or positive clock slew exists. If negative clock slew exists and it is determined that negative clock slew falls within a certain threshold, a sample is skipped. If positive clock slew exists and falls within a certain threshold, positive clock slew is converted to negative clock slew by taking an extra sample.

Abstract: A method to enhance performance of a dual-mode or dual-band mobile phone includes, after the phone has initially connected to a CDMA wireless network, monitoring a level of total power received by the phone. This power level is compared to a preset threshold level. If the power level remains below the threshold level for over two seconds, the dual-mode or dual-band phone switches to an AMPS or other network retrieved from the preferred roaming list that is stored in the phone. If the power level is above the threshold, the phone moves into the idle state. Once in the idle state, both the pilot strength and Received Signal Strength Indication are monitored. If both of these levels are below respective thresholds for over eight seconds, the phone switches to another network stored in the preferred roaming list. If the mobile phone is not a dual-mode or dual-band phone, the mobile phone can perform similar measurements and switch between service provider systems compatible with the mobile phone.

Abstract: A mobile telephone system and a method for answering a mobile telephone incoming call by a user's verbal command, to allow hands-free voice. The mobile telephone system includes a carkit and a mobile telephone. The mobile telephone has a programming key for pre-programming the user's voice greeting, a keypad for answering the call in telephone mode, a microphone for entering a user's verbal command for answering the call in carkit mode, a digital processor connected to the microphone for performing spectrum analysis and feature extractions of the user's verbal command in carkit mode, and a memory connected to the digital processor, having a database for storing the user's pre-programmed voice greeting digitized speech pattern. The pre-programmed voice greeting may be a factory-programmed voice greeting or the user's pre-programmed voice greeting, if previously initialized after pressing the programming key.

Abstract: Microprocessor resource utilization by a searching process are controlled by determining a search window size, accessing a lookup table to determine an integration interval and a number of non-coherent passes, and commanding a searching process to execute a multipath search according to these parameters. The lookup table comprises a plurality of integration intervals and corresponding number of non-coherent passes indexed according to search window such that an execution duration of the search process remains nominally constant over a variety of search window sizes.

Abstract: A wireless communication device provides streamlined access to recording functions that allow a user to readily record information from a called directory information service provider or other predetermined number. Directory service provider numbers and other predetermined numbers are stored in the system and compared with a user selected destination telephone number. If a match is detected, the system display automatically enables a recording function or prompts the user to manually activate the recording function to permit the user to manually record information obtained from the directory information service provider. Alternatively, the information may be automatically transferred directly into the system without user intervention through a communication link using a formatted data exchange. The system includes options for editing the recorded information, permanently storing the recorded information, and completing a call to the telephone number provided by the service.

Abstract: A combined Personal Digital Assistant (PDA) (208) and wireless telephone (206) has a switch (204) which, if selected by the user through a user interface (104), will power-on the PDA in response to the stylus being removed from the PDA's stylus holder (106). The switch, also selectably, will power-off the PDA in response to the stylus being replaced into the PDA. The switch further allows selection as to whether either or both of these actions will also turn the telephone on or off. The switch further allows selection as to whether either or both of these actions will also open or close the keypad (108).

Abstract: A method is provided of adding an encryption element to the QAM modulation/demodulation process. This is achieved by first forming a sequence of transmit QAM constellation symbols on the basis of the information signal to be modulated/demodulated, which signal is comprised by a corresponding sequence of transmit information values. Each QAM transmit constellation symbol is based on a fixed transmit constellation in a complex plane and is characterized by a real part and an imaginary part, each part including a sign, the sign consisting of plus or minus. On the basis of a fixed algorithm, during signal modulation, one or more of the transmit constellation symbols are altered by, for example, conjugating the sign value of either the real or imaginary parts thereof to form a disguised or encrypted set of symbols.

Abstract: A quality dispatch service on a CDMA based wireless system. To achieve spectral efficiency and fast access for follow-up calls, in response to a request by a talkgroup member to have a group call established, the non-requesting (listening-only) members are allowed to establish a low-rate (non-voice) signaling link in the reverse direction (inbound) for the limited purpose of (i) providing forward power control information to the fixed infrastructure; (ii) requesting soft hand-off when required; and (iii) maintaining the correct reverse link power control to allow for fast channel access for a follow-on call. In accordance with the illustrative embodiment, the establishment of low-rate inbound signaling links occurs prior to beginning the voice communications.

Abstract: A priority scheme for a system that supports dispatch and telephone services whereby more important calls, of the type spanning across the same or multiple cells, are dynamically assigned higher positions in the queue for the next voice channel to become available. Less important calls are readily identified and can have their voice channel taken away, i.e., dropped, to provide a channel for an emergency call. The priority scheme also makes it possible to for the priority of call in progress to dynamically change, e.g., increasing priority over time so that its voice channel can't be taken away by a higher priority call, or decreasing priority of call as a function of time in progress.

Abstract: A key variable correction scheme allows errored encryption key material in mobile and portables radios to be quickly identified and corrected. The errored encryption material can be corrected automatically by a key management controller, once detected. Consequently, a mismatch problem can be diagnosed and resolved in a manner which is automatic, therefore quick and efficient, and in a way which overcomes the difficulty which users have in identifying by themselves a mismatch condition since the result is often only silence out of their respective radio speaker. Once the mismatch is corrected by the reassignment of correct keys, the user is free to join the radio call already in progress.

Abstract: A radio communication system includes a plurality of sites that each belong to one of a plurality of zones. The plurality of zones are each linked to a zone controller and the plurality of sites are employed to facilitate communications among a plurality of communication units affiliated therewith. A method of establishing a communication between two of the plurality of communication units that are presently affiliated with sites not belonging to a common zone includes the step of determining a preferred zone for at least one of the plurality of communication units. After identifying a usable site that belongs to the preferred zone, the communication unit then affiliates with the usable site to facilitate the communications with the second communication unit.

Abstract: A digital recorder detrunks calls for logging prior to recording same. This allows retrieving what a radio monitoring a particular talkgroup hears and combines that with the best features of a detrunk-on-playback system, namely the ability to isolate those portions of all the system communications which are desired or specifically excluded. The fluid associations between talkgroup IDs, multigroup IDs, and supergroup IDs are used by the recorder to search for the audio which the user wishes to hear. The retrieval of audio heard by a particular, individual radio is made possible through the incorporation of radio affiliation information into a searchable database. A specified individual radio ID may be tracked with respect to its talkgroup affiliations, during a specified time interval, by an appropriate search algorithm. Those affiliations can, in turn, be further used with the talkgroup/supergroup/multigroup search algorithm to retrieve the audio heard by an individual radio user.

Abstract: A quality dispatch service on a CDMA based wireless system. To achieve spectral efficiency and fast access for follow-up calls, in response to a request by a talkgroup member to have a group call established, the non-requesting (listening-only) members are allowed to establish a low-rate (non-voice) signaling link in the reverse direction (inbound) for the limited purpose of (i) providing forward power control information to the fixed infrastructure; (ii) requesting soft hand-off when required; and (iii) maintaining the correct reverse link power control to allow for fast channel access for a follow-on call. In accordance with the illustrative embodiment, the establishment of multiple inbound signaling links in a CDMA dispatch call occurs as a background process while beginning the voice communications immediately.

Abstract: An on-board vehicle navigation system parking space finder that offers a driver a competitive edge in finding available on-street parking. Drivers not familiar with an area are able to locate available metered parking spaces with ease. Drivers may be informed, on demand, of what type of currency they need for parking meters in certain areas, so they can stop for change, if necessary. Drivers will have information about maximum time limits for different parking meters, and can use this information to select meters with longer time limits, if necessary. Metered parking information specific to a vehicles current location, as well as metered parking information specific to a requested location, are made optionally available to drivers from within their vehicles.

Abstract: In a digital multi-channel simulcast system, a redundant centralized timestamping device acts as a simulcast controller for multiple channels simultaneously. All packets within a regional multi-channel system which require simulcast transmission are sent to a central timestamping device which determines the appropriate launch timestamp for each packet and attaches it thereto. The timestamping device is able to support concurrent timestamping sessions for each channel of a multiple channel system and can be dynamically assigned (trunked) to service any given radio channel on a packet by packet, call by call, or less frequent basis.

Abstract: A packet voting server and associated method for performing voting services on multiple radio channels simultaneously and including capability to be dynamically assigned (trunked) to service any given radio channel, for example, on a packet by packet, call by call, or less frequent basis.

Abstract: A radio communication system (100, 200) employs a method of providing communication services to a communication unit (104, 105) having a plurality of service requirements. The radio communication system (100, 200) further includes a plurality of service providers (101-103) for which the communication unit catalogues (506, 512) service attributes as part of the inventive method. Further, for each of the service requirements, the communication unit (104, 105) selects (514) one of the plurality of service providers (101-103) to facilitate that service requirement.