Motorola Corporation

Other

Thomas Wayne Lockhart

Karl Anthony Reardon

Geoffrey Richard Scotton

William H Kilner

Farzan Mamaghani

David W Russo

Robert Davis Battin

Denis Beaudoin

Andrew Scott Lundholm

Bud Fraser

Ricardo Lim

Barry Moss

Brian L Douthitt

Nazira Chatur

Robert Wiebe

Donald Edmund Koss

David William Russo

Mark S Scivier

Roger Theriault

Richard Mosher

A technique is used in an infrastructure (,) of a two-way radio synchronous communication system (,) to efficiently acquire a predetermined type of information from a selective call device (,). The technique includes receiving an inquiry (,), generating a response schedule, generating a response command message (,), transmitting the response command message, receiving a demand response (,), and accepting the demand response as an acknowledgment to the response command message. The inquiry includes a device latency needed for the selective call device to generate the predetermined type of information and includes a response length. The response schedule is determined from the device latency and the response length. The response command message includes a special command and the response schedule. The demand response includes the predetermined type of information, and is transmitted in accordance with the response schedule. The demand response is accepted as an acknowledgment to the response command message.

Method for acquiring a predetermined type of information from a selective call device in a communication system

A communication system in which a user device (,) generates authentication information (,) unique to the user device and provides a data packet (,) including this authentication information to an infrastructure part which is a gateway (,) or a host (,). The packet also contains a host identifier (,) or time dependent information (,). This is used at the gateway (,) or the host (,) to authenticate the packet.

Authentication in a packet data system

An internal network (,) is protected from being overloaded by an excessive number of data packets that originate from a source in an external network (,). In a preferred embodiment, data packet gate (,) receives each incoming data packet and determines whether it came from a trusted source. If it was not from a trusted source, and the number of data packets received recently from the same source exceeds a threshold, then data packets from that source are rejected. Preferably, when incoming data packets from all non-trusted sources exceed another threshold, additional data packets from all non-trusted sources are rejected.

Method for protecting a network from data packet overload

A base station (,) capable of receiving reverse channel data using two over the air protocols preferably comprises a transmitter (,) and modulator (,) for forward channel transmissions in at least a first protocol, a multi-mode base receiver (,) capable of receiving data on a reverse channel using multiple protocols including the first protocol and at least a second protocol. The dual mode base station further comprises a processor (,) that receives a timing source for the second over the air protocol derived from the remote controller (,) for the second over the air protocol. The processor is preferably programmed to decode timing information from the timing source allowing the multi-mode base receiver,to provide a busy indicator to the transmitter,and modulator,to inhibit the reverse channel of the first over the air protocol during a period set by the busy indicator.

Method and apparatus for multi-protocol reverse channel infrastructure sharing

A communications unit (10) with a packet subdivider operable on a data packet (200) and an error detecting code generator. An acknowledgement message (NAK) is generated including error detecting code corresponding to packet portions (210-204) from the packet subdivider, thereby requesting retransmission of packet portions. At an originating unit (100) an error detection code is computed for each portion. The computed second error detection code for each sub-portion is compared with the received first error detection code for that portion. Portions for which corresponding error detection codes do not match are identified as bad portions and are retransmitted (220).

Communications unit and method of communicating having efficient packet

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.

Data communications system with session control

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. The method of filtering may vary or be modified, for example, according to attributes of the URL within the query, proxy attachment point (310) for the browser, response content, or changing browser requirements, as user, device, or network service needs change.

Proxy host computer and method for accessing and retrieving information

In a data communications system, including an infrastructure arranged to communicate over a data channel with a plurality of data terminals, a method of detecting data decryption errors in a data packet includes receiving an encrypted data packet (213); decrypting the encrypted data packet to provide a decrypted data packet; and comparing a reference value to a portion of the decrypted data packet to determine when a predetermined relationship is satisfied (221).

Methods of detecting decryption errors

A subscriber terminal (104) suitable for operation in a wireless communications system (100) arranged and constructed to provide data communications between the infrastructure (111) and the subscriber terminal, includes a portable computing device (105) operating in a operating state and a radio frequency receiver (201) operatively coupled to the portable computing device, the radio frequency receiver arranged to detect a radio frequency interference corresponding to an operating environment, and to execute a corrective action that corresponds to the radio frequency interference. A corresponding method of avoiding desensitization of the radio frequency receiver includes detecting, at the RF receiver, a radio frequency interference that corresponds to an operating environment to provide an interference indication; determining, responsive to the interference indication, a corrective action for the RF receiver; and executing the corrective action for the RF receiver.

Method and apparatus for avoiding desensitization of a radio frequency

A PCMCIA card having independent functionality and alternatively arranged to operate in conjunction with a host computer, that includes a peripheral apparatus (109) having an integral CPU (125), a power source (129), and a power supply (127) for exhibiting an independent operating state; and an interface function (121) integral with and coupled to said peripheral apparatus (109), said interface function arranged and constructed to couple said peripheral apparatus to the host computer (101) over a PCMCIA compliant interface and initiate a dependent operating state at said peripheral apparatus (109).

Peripheral card having independent functionally and method used therewith

In a data communication system (100) including infrastructure (101) arranged to communicate with a plurality of terminals (103) over a channel (109), a method of adaptable registration includes determining a registration status (401), and executing a registration contention procedure adaptable to the registration status (403). A corresponding method of facilitating adaptable registration includes determining a registration contention information (501), the registration contention information corresponding to a contention procedure implemented by the plurality of terminals, and sending a message corresponding to said system registration information (519).

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Richmond, Canada

Thomas Wayne Lockhart