Abstract: A method and apparatus identifies (810) communication cells (500) in a simulcast radio communication system (100) comprising the cells (500) and a portable communication unit (PCU) (108). Identification bit .patterns (602, 604, 606) are assigned (802) to the cells (500) in a manner such that when transmissions of the identification bit patterns are received simultaneously from cells (500) adjacent to one another, thereby producing a received interference bit pattern (708), identities of the cells (500) received can be resolved to a subset of the cells (500) by analysis of the received interference bit pattern (708), wherein the subset is inclusive of the cells (500) received.

Abstract: A simulcast system (FIG. 16) capable of synchronizing and maintaining synchronization of a plurality of base sites (1602, 1604, 1606, 1608) is coupled to a transmitter controller (226). The plurality of base sites (1602, 1604, 1606, 1608) is capable of transmitting data as radio frequency transmission at substantially the same time. A generator (1808) generates time marks (1708) at a predetermined time period (T). A data divider (1812) divides data into predetermined packets to be interposed between at least a pair of time marks. The data packets (1704) and time marks (1708) are transmitted to the plurality of base sites (1602, 1604, 1606, 1608). The plurality of base sites (1602, 1604, 1606, 1608) includes base site receivers (1603, 1605, 1607, 1607) for receiving the data packets (1704) and time marks (1708) and clocks (1611, 1613, 1615, 1617) for measuring the time (T) between each pair of time marks.

Abstract: A paging system (100) includes a transmitter (104) for transmitting first information including a transmitted page, a receiver (108) for receiving second information, and a diagnostic controller (106) coupled to the transmitter (104) and the receiver (108) for monitoring the first and second information to determine whether the transmitted page was correctly received by the receiver (108).

Abstract: A method for measuring a time delay between a controller (302) and a plurality of base sites (306) in a simulcast system (300). The method begins with the controller (302) transmitting a synchronization signal to a selected base site (306A) and to a delay measurement device (316). Upon receipt of the synchronization signal by the selected base site (306A), the selected base site (306A) transmits a signal to the delay measurement device (316). The delay measurement device (316) determines the time between the receptions of the synchronization signal transmitted by the controller and the signal transmitted by selected base site (306A). The delay measurement device (316) transmits the delay time determined between the receptions of the synchronization signal transmitted by the controller and the signal transmitted by the selected base sites (306A) to the controller (302) which programs the base sites (306) to delay transmissions of the RF signals in response to the measured delay time.

Abstract: An electronic system having a plurality of resettable modules, such as memories and input/output circuits, wherein the modules are selectively, individually resettable by providing each module with a specific time slot during which it can receive a reset signal and be reset. The reset signal either is not supplied to other modules outside of their individual time slots, in the case of a multiplexed bus, or has no effect until a time slot signal is applied in coincidence therewith.

Abstract: A method for synchronizing message transmissions in a simulcast transmitter system is described. A master controller couples to a plurality of regional controllers for enabling message transmissions and for initiating delay measurement signal transmissions in each of a plurality of regions. The master controller generates a first delay measurement signal which is transmitted from a selected one of a plurality of regional transmitters operating within a first transmission region. The regional controller within the first transmission region measures the propagation delay of the selected one of the plurality of regional transmitters within the first transmission region. The master controller next generates a second delay measurement signal which is transmitted from a selected one of the plurality of regional transmitters operating within a second transmission region adjacent to the first transmission region.

Abstract: A universal PSTN page entry protocol method and arrangement is disclosed whereby any type of incoming call may be accommodated at a single telephone input, be it a call from a standard telephone set or from a computer/VDT or PET terminal device. This permits an originating call to any type of pager whether tone-only, tone and voice, numeric and/or alphanumeric pagers.

Abstract: A paging controller for a paging communication system exchanges information by a global multiplexed bus arrangement. The bus arrangement permits voice, data and control information to be exchanged between a common memory and a plurality of I/O modules in a common communication bus. The timing signals of the bus arrangement including the I/O modules are synchronized to expeditiously exchange information among the modules. In operation, each module has a preassigned address representative of a sequence number in a predetermined succession order to permit each module to access the bus.