Location system and communication system
AssigneeAT&T Intellectual Property II, L.P.
InventorsAndrew Martin Robert Ward, Stephen Edward Hodges, Peter Joseph Steggles, Rupert William Meldrum Curwen, Joseph Francis Newman
Life of this patent
Estimating the term…
Abstract
A location system comprises a plurality of transponders whose locations are detectable by a base system. The base system interrogates (51-55) the transponders one at a time in accordance with a schedule of consecutive time slots. In response to a priority request received (53) from one of the transponders, the base system interrupts the schedule and interrogates substantially immediately (56, 57, 55) the signaling transponder so as to determine its location with minimal latency.
Claims8
A method for transmitting a message in an asynchronous time-division multiplex communication system, the method comprising:
- receiving stock share price data to be transmitted to subscriber pagers;
- forming the data into data payloads of data packets;
- assembling the data payloads with headers containing destination information including an address of a receiving subscriber pager, each payload being addressed to a single pager;
- scheduling transmission of the payloads one per time slot in a sequence of time slots comprising an original schedule, wherein a first subscription option associated with a particular subscriber pager affects how often payloads are addressed to the particular subscriber pager;
- receiving a request to transmit a stock crash warning priority message, the request being generated externally of the communication system
- transmitting in a first time slot after receiving the request, the stock crash warning priority message only to subscriber pagers associated with a second subscription option in response to the request;
- and
- rescheduling transmission of the payloads in a sequence of time slots delayed one time slot from the time slots of the original schedule.
A non-transitory computer-usable medium having computer readable instructions stored thereon for execution by a processor to perform a method for transmitting a message in an asynchronous time-division multiplex communication system, the method comprising:
- receiving stock share price data to be transmitted to subscriber pagers;
- forming the data into data payloads of data packets;
- assembling the data payloads with headers containing destination information including an address of a receiving subscriber pager, each payload being addressed to a single pager;
- scheduling transmission of the payloads one per time slot in a sequence of time slots comprising an original schedule, wherein a first subscription option associated with a particular subscriber pager affects how often payloads are addressed to the particular subscriber pager;
- receiving a request to transmit a stock crash warning priority message, the request being generated externally of the communication system
- transmitting in a first time slot after receiving the request, the stock crash warning priority message only to subscriber pagers associated with a second subscription option in response to the request;
- and
- rescheduling transmission of the payloads in a sequence of time slots delayed one time slot from the time slots of the original schedule.
Dependencies are inferred from the claim text.