A method of communicating messages between subscribers to an electronic messaging network, comprising the steps of: maintaining, at a network operation center, a first file of canned messages and message codes respectively assigned to the canned messages; maintaining at a first terminal of a first subscriber, a second file of canned messages and message codes corresponding to the first file; maintaining, at a second terminal of a second subscriber, a third file of canned messages and message codes corresponding to the first file; selecting an appropriate canned message from the second file for transmission to the second terminal; sending the message code assigned to the selected canned message to the network operation center; relaying the message code assigned to the selected canned message from the network operation center to the second terminal; retrieving the selected canned message from the third file using the assigned message code received from the network operation center; and displaying the selected canned message retrieved from the third file. view more

The method defined in claim 8, further including the step of adding a parameter to the canned message selected from the second file; the sending step including the step of sending the added parameter with the assigned message code to the network operation center; the relaying step including the step of relaying the added parameter with the assigned message code to the second terminal; and the displaying step including the step of displaying the selected canned message with the added parameter incorporated therein. view more

A message terminal for use in an electronic messaging network, comprising: a memory storing a file of canned messages and message codes respectively assigned thereto and a file of canned multiple response options and response codes respectively assigned thereto; means for retrieving the file of canned messages and the file of canned multiple response options from the memory; a display for displaying the canned messages and the multiple response options in the retrieved file; means for selecting one of the canned messages and at least one of the multiple response options appropriate for the selected canned message for communication to a designated other message terminal; and a transmitter for transmitting the message code assigned to the selected canned message and the response code assigned to the at least one multiple response option over a communications link of the network. view more

In a multi-carrier simulcast transmission system, a method for transmitting in a desired frequency band ›a! at least one message contained in an information signal, the method comprising the steps of: generating a first plurality of carrier signals within the desired frequency band, each of the first plurality of carrier signals representing a portion of the information signal substantially not represented by others of the first pluarlity of carrier signals; generating a second plurality of carrier signals within the desired frequency band, each of the second plurality of carrier signals corresponding to and representing substantially the same information as a respective carrier signal of the first plurality of carrier signals; transmitting the first plurality of carrier signals from a first transmitter; transmitting the second plurality of carrier signals from a second transmitter in simulcast with transmission of the first plurality of carrier signals from the first transmitter. view more

A mobile unit for transmitting and receiving radio frequency signals to and from a communications network comprising: means for receiving a radio frequency message from the network; a display for displaying said message; a switch actuatable to specify a portion of the displayed message for which a user desires retransmission from the communications network; means for transmitting, only upon actuation of the switch, a signal to the communications network requesting retransmission of said specified portion of said message; and means for receiving said specified portion retransmitted from the communications network and for displaying the received specified portion on the display. view more

A method for receiving and transmitting messages at a mobile unit, comprising the steps of: receiving at the mobile unit a radio frequency message; displaying said message on the mobile unit; receiving an indication of a portion of the displayed message for which a user desires retransmission; transmitting, only upon receipt of the indication, a signal requesting retransmission of said indicated portion of said message; receiving a retransmission of said indicated portion; and displaying the received retransmission of said indicated portion on the mobile unit. view more

In a two-way wireless communications system, a method of processing data messages that cannot be successfully transmitted from a network operations center to a wireless mobile unit comprising the steps of: (a) transmitting a data message from the network operations center to the mobile unit; (b) receiving at the network operations center a data acknowledgment message from the mobile unit acknowledging receipt of the data message sent by the network operations center; (c) transmitting a probe message from the network operations center to the mobile unit if, after transmitting a data message to the mobile unit, no data acknowledgment message is received at the network operations center; (d) marking at the network operations center a data message as undelivered if, after transmitting a probe message to the mobile unit, no probe acknowledgment message is received at the network operations center; and (e) storing at the network operations center the undelivered data message. view more

A method of operating a plurality of paging carriers in a single mask-defined, bandlimited channel comprising the step of transmitting said carriers from the same location with said carriers having center frequencies within said channel such that the frequency difference between the center frequency of the outer most of said carriers and the band edge of the mask defining said channel is more than half the frequency difference between the center frequencies of each adjacent carrier. view more

A method for information transmission by a plurality of transmitters to provide broad communication capability over a region of space, the information transmission occurring during at least both a first time period and a second time period and the plurality of transmitters being divided into at least a first and second set of transmitters, the method comprising the steps of: (a) generating a system information signal which includes a plurality of blocks of information; (b) transmitting the system information signal to the plurality of transmitters; (c) transmitting by the first and second sets of transmitters a first block of information in simulcast during the first time period; (d) transmitting by the first set of transmitters a second block of information during the second time period; and (e) transmitting by the second set of transmitters a third block of information during the second time period. view more