Abstract: A two-way communication system is used for performing dynamic channel control. The two-way communication system comprises a base transceiver (102) and a plurality of selective call transceivers (122). The base transceiver (102) includes a plurality of base stations (116) controlled by a controller (112). The base transceiver (102) transmits query signals to the selective call transceivers (122) to prompt communication. The selective call transceivers (122) measure the signal quality of signals transmitted by the two-way communication system and transmit in return signal quality measurement data to the base transceiver (102) for analysis. The base transceiver (102) dynamically adjusts the signal quality of signals to be received by the selective call transceivers (122) in order to substantially reduce the noise interference that the selective call transceivers (122) experience.

Abstract: A method and apparatus of bringing sampling instants of a first internal coder-decoder (14) of a first microprocessor (10) into synchronization with sampling instants of a second internal coder-decoder (20) of a second microprocessor (12). The first and second microprocessors (10 and 12) wait a predetermined time to achieve phase lock. A common interrupt is generated by the first microprocessor (10). The common interrupt is simultaneously sent to and received by the first and second microprocessors (10 and 12). The first and second internal coder-decoders (14 and 20) are forced into a known state simultaneously.

Abstract: A communication system (10) has a plurality of selective call transceivers (30) which operate as one-way selective call receivers in one-way coverage zones (16) where no registration is required or operate as selective call transceivers in two-way coverage zones (36) where registration is required or operate in one-and-a-half way zones where registration is attempted but not required for the selective call transceiver to receive outbound messages. The system further comprises a plurality of outbound transmitters (17, 18, and 19) covering one-way coverage zones (12, 14, and 16 respectively) and a plurality of base receivers (37, 38, and 39) and transmitters (11, 13, and 15) covering two-way coverage zones (32, 34, and 36 respectively). The one-and-half-way zone is primarily a mode of operation useful in areas having "spotty" inbound coverage and is not necessarily designated by a geographic location.

Abstract: A method of operation of a data communications system (5) with session control having a data communications network (10) and at least a first communications device (1), a second communications device (2) and a third commnunications device (3) in communications with the data communications network (10). The data communications network (10) identifies a fault status change in communications with the first communications device (1), generates a session control command (6) with an identification number (7) attached responsive to identifying the fault status change and sending the session control command (6) to at least the second and the third communications devices (2 and 3). At least at the second communications device (2), the second communications device (2) receives the session control command (6), deter-mines from the identification number (7) whether the second communications device (2) is affected by the fault status change and selectively performs a session control action in response thereto.

Abstract: A selective messaging system controller (105) and analogous methods arranged to schedule messages and control transmitters in a messaging system (100) having a service area so as to enhance a reuse factor, includes: a network port (102) for accepting message requests that is coupled to a processor (131) for forming a first plurality of messages, including an associated zone ID (407) for each message, scheduled for concurrent transmission, during a first time period, within a first coverage pattern (503) that creates interference areas (525) and a second plurality of messages scheduled for concurrent transmission, during a second time period, within a second coverage pattern (505) that provides coverage for a portion of the interference areas; the processor further coupled to a transmitter port (106), for sending the pluralities of messages to the transmitters and controlling these transmitters; and a receiver port (109) for receiving a registration message including one coverage zone ID that identifies a cove

Abstract: A radio (100) includes a receiver circuitry (106) for use in conjunction with a tunable antenna (101). The radio includes a controller (122) which may be a digital signal processor. The controller (122) controls various radio functions including tuning of the antenna (101), measurement of the quality of received signals, and generation of a test signal. The radio is capable of generating a test signal on a desired frequency, which is radiated within the radio, received at the antenna (101) and then processed by receiver circuitry (106). Its quality is then measured and used to control the tuning of the antenna (101). The test signal generated by the controller (122) can be mixed up to the desired frequency by using one or more of the local oscillator signals of the radio.

Abstract: A selective call receiver unit (100) having a post detection filtering system optimized for both simulcast delay spread and receiver sensitivity includes a receiver (20), a detector (30) for detecting a message and providing a detected signal, a first post detection filter (40) for filtering the detected signal and further being optimized for sensitivity providing a first filtered signal, and a second post detection filter (41) for filtering the detected signal and further being optimized for simulcast delay spread providing a second filtered signal. In addition, a combiner 45 is used for selectively combining the first filtered signal with the second filtered signal.

Abstract: Methods of and corresponding apparatus for scheduling messages on an operating channel (123) in a selective messaging system (100) for a selective messaging unit (135) include choosing a preferred channel (711) from a first channel and a second channel, setting a first priority for the first channel (713) and a second priority for the second channel, the priorities, for example by relative magnitude, corresponding to the preferred channel, and scheduling a message (715) for the selective messaging unit on the preferred channel. Analogously, at the selective messaging unit a method of selecting an operating channel includes detecting a first priority signal corresponding to the first channel (621) and a second priority signal corresponding to the second channel, and based on a comparison of the priority signals (623) selecting the operating channel (625) from the first and second channel.

Abstract: A query (160) is sent from a browser (100, 101) to a proxy (300) directed to an information source (140) in a networked data communications system. In one aspect, the query is modified by the proxy to provide a modified query and the modified query is forwarded to the information source (120). A response (170) is received at the proxy from the information source and forwarded to the browser. In another aspect the response is modified by the proxy to provide a modified response (370) which is forwarded to the browser. The proxy (300) has a proxy configuration database (340) including a file (341) of services identifying a method of filtering for a specified browser (100) and filters (302, 304) for filtering responsive to the file of services, respectively, queries from and responses to the specified browser.

Abstract: Apparatus in a receiver (109) and analogous method for detecting or acquiring a timing reference or error for a data signal, including a receiver front end (201) for receiving a sequence of symbols, and a signal processor (218) programmed to correlate, using a recursive procedure, the sequence of symbols to a predetermined sequence of symbols to provide a correlated magnitude corresponding to a timing error (212) and then adjust a timing reference in accordance with the timing error.

Abstract: A selective messaging unit (117), and analogous method, arranged to reduce switching latency between operating channels that are scheduled in accordance with different time references, the unit including: a receiver (403) for monitoring a first operating channel (115) scheduled in accordance with a first time reference; a controller (405), coupled to the receiver, for providing an indication corresponding to a second time reference; and for controlling the receiver to scan for a second operating channel (125) that is scheduled in accordance with the second time reference.

Abstract: Connector and methods for attachment to hollow anatomical structures. The connector consists of an annular rigid body and multiple holding members affixed along its opening. The opening and the inner surface and of the annular body correspond respectively to the opening and the external surface of a hollow anatomical structure. The holding members are deformed by an applied force in a manner that the deformed holding members protrude into the opening of the hollow structure and press it towards the annular rigid body, thus attaching the connector to the hollow anatomical structure. Various embodiments of connectors and methods are provided for attaching the connectors to hollow anatomical structures with different external surfaces.

Abstract: Methods of and corresponding apparatus for scheduling messages on an operating channel (223) in a selective messaging system (200) for a messaging unit (235) include scheduling a first message, including a channel priority indication (511), addressed to the selective messaging unit on a first channel, and then scheduling a second message for the selective messaging unit on a second channel (225) selected as an alternative operating channel. Analogously at the selective messaging unit a method of selecting an operating channel includes monitoring the first channel for a message addressed to the selective messaging unit; detecting as part of the message the indication; and responsive thereto discontinuing monitoring the first channel and then scan for the second channel.

Abstract: A method for efficient encryption and decryption (100) comprises the steps of encrypting a message (104) at a sending unit which is to be sent to a receiving unit using a message key (106) and appending to the message at the sending unit the message key encrypted (108 and 109) using a receiver's public key (110). Subsequently, a sender's certificate (116) is appended at a first server (302) and extracted at a second server (310). The message key is then decrypted at the receiving unit using a receiver's private key (140) to provide a decrypted message key. Subsequently the message is decrypted using the decrypted message key (142 & 143) and authenticated by comparing a pair of digest (152 and 156).

Abstract: A messaging receiver (400) and corresponding system (100b) and method adaptable to a plurality of modulation formats including; a processor (401) having flexible resources (404), preferably software based, for receiving a signal to provide a modulation identifier, and a controller (403), coupled to the processor, for deploying the flexible resources responsive to the modulation identifier. Alternatively the messaging receiver includes a buffer (412) for storing a signal having a modulation format, and the processor processes the signal in accordance with the plurality of modulation formats so as to differentiate the modulation format, and the controller deploys the flexible resources responsive to the modulation format.

Abstract: A communication system (10) for coupling a selective call transceiver (18) to a widely distributed information source (24) comprises a server (22) coupled to the widely distributed information source. The server contains agents for retrieving information customized for a given selective call transceiver. The system further includes a paging terminal (20) coupled to the server for allowing the selective call transceiver to request information from the server. The system also includes a transmitter for transmitting the predetermined information retrieved from the widely distributed information source to the selective call transceiver.

Abstract: A method and apparatus for communicating a user created message from a portable transceiver (122) to a caller. The user of the portable transceiver (122) creates the user created message and stores it in the memory of the portable transceiver (122). The caller calls a communication terminal (102) and provides information that determines who the called party is, where the user created message retrieved from the called party is to be delivered, and in what format it is to be delivered. The communication terminal (102) sends a query message (400) to the portable transceiver (122) to retrieve the user created message. The portable transceiver (122) in response transmits the user created message to the communication terminal (102). The communication terminal (102) then translates the user created message into a voice message, if requested by the caller, and delivers the message to the caller by way of telephony or a page.

Abstract: A method of operating a selective call receiver (170) that roams a plurality of separate simulcast areas (20) including a specific area where the selective call receiver shares the same address with a second selective call receiver but where only one of the receivers is able to decode a message broadcast in the specific area includes the steps at the selective call receiver of receiving a target address, a tag representative of the specific area, and an associated message. Then the associated message is decoded (40) when both the target address and the tag representative of the specific area match an address (38) and a tag (36) stored in a memory location (77 or 76) within the selective call receiver and otherwise ignoring the associated message when either the target address or the tag representative of the specific area fail to match the tag and the address stored.

Abstract: A system controller (105), and analogous method, for a two way selective messaging system (100) that is arranged to reduce traffic on a network channel (109) that intercouples a plurality of base receivers (115-118, 125-128) includes a source port (303) for receiving a message from a message source, a memory (305) for storing a data base including an activity pattern of the plurality of base receivers, a processor (307), coupled to the source port and the memory for selecting an inbound schedule for a response from a selective messaging unit (131) where the inbound schedule is selected to reduce traffic, corresponding to the inbound schedule, on the network channel, and a transmit port (107) for sending the message along with the inbound schedule to a transmitter (111).