Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
  • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
  • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
• • G—PHYSICS
  • G08—SIGNALLING
  • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
  • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
  • G08C15/06—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division
  • G08C15/12—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division the signals being represented by pulse characteristics in transmission link
• • G—PHYSICS
  • G08—SIGNALLING
  • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
  • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
  • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

Definitions

• the invention relates to a method for central detection of data sent from different senders to one Receivers are transmitted wirelessly, with the switch-on times and the respective duty cycle of the receiver matched to the transmission times of the corresponding transmitters and the transmissions of the respective stations take place at a distance from each other.
• the object of the invention is to overcome the aforementioned disadvantages to avoid and a procedure of the type mentioned specify the cost and energy consumption of the Receiver are reduced and reception on the transmitter side Transfers is ensured.
• the data transmissions of the various Transmitter within a section of the repetitive Time interval take place so that all transmissions take place within a limited period of time and there are also transmission-free time periods. This can be particularly advantageous if several independent systems with a process of this kind at the same time operated in close spatial proximity; then each system can have a certain portion of the time are assigned and overlaps or mismatches can be avoided.
• the transmitters can be at least approximately continuous Have serial numbers and the individual transmission times of the various transmitters depending on the serial number be so that a systematic connection between serial number and time of transmission exists. This will help usual use cases where during installation the transmitters roughly in order from a larger one Packing unit for assembly in the object, one Overlap or the simultaneous transmission of several stations, what would hinder transmission. Be too through this connection when exchanging transmitters, e.g. B. in the case of defects, conclusions on the time of transmission based on the serial number and a replacement transmitter can be programmed accordingly.
• serial numbers can be strictly continuous run away, but they can only be roughly continuous be, e.g. B. by failure or lack of some transmitters assembly or by exchanging transmitters during operation. In this respect, both gaps in the operation consecutive order may arise, however also some serial numbers outside the other range lie. This will take advantage of this method partially weakened, but this has an effect only from a certain percentage of gaps or "Outliers" noticeably.
• the time of transmission of the individual transmitter within of the time interval or of the partial area of the time interval by being determined from an even distributed and starting from zero continuously numbered number of possible transmission times within of the time interval or of the partial area of the time interval the corresponding time to be broadcast by reversing the numerical order of a number of the last Digits of the serial numbers is determined, the Minimum number of possible transmission times through the base of the number system used exponentiates with the number the location to be reversed.
• the minimum number of possible transmission times through the base of the number system used exponentiates with the number the location to be reversed.
• serial numbers or their final digits in one any number system can be reversed, e.g. B. hexadecimal, Octal or binary system, the distribution uniformity roughly inversely proportional to the base of the number system rises or falls. So that's it Binary number system works best because it matches the smallest possible basis enables the most even distribution.
• the number of possible transmission times is included on the one hand by the transmission length of the respective Transfers and the minimum distance between two transfers from each other to avoid overlap upwards limited, on the other hand, it must be with the usual number of channels and transmission frequencies above a minimum value be arranged.
• At least the serial numbers can each in a number system that differs from the decimal system, in particular as binary numbers, so that an even distribution of the transmission times as possible within a given time interval regardless of the number of transmissions or transmitters done automatically.
• the numbering of the possible transmission times and / or the serial numbers are given can meanwhile Conversions are made from one number system to another.
• the time interval for switching on the receiver is brought forward and the duty cycle can be extended so that even if there is a time difference between the transmitter clock and the receiver clock a reception on the next retransmission probably done.
• the recipient can continue to receive a data transfer for transmissions from this transmitter to the next Scheduled transmission of new data switched on again so that additional energy is saved. With increasing number of transmissions already received can thus greatly reduce energy consumption become.
• the time of transmission can preferably be within the time interval or part of the time interval at least once within retransmissions, in particular varies on the last retransmission so that in any case, if necessary by addition the transmission time variation and the receiver side Advancement of the switch-on time and extension of the Duty cycle a match of transmission time and receiver activation is achieved and transmission reception is ensured.
• This variation can for example, in that - different from the previous retransmissions - on the last one Retransmission is currently no reversal in order to assign the time of transmission takes place or only a small part the sequence of digits is reversed.
• all transmitters get once within the repetition period either one completely different broadcast date or a little unscheduled deviation within the duty cycle, making the transmission probability clear is increased.
• a time correction can advantageously be carried out on the receiver side to compensate for deviations between transmitter time determination and receiver time determination take place, with time correction the deviation of the corresponding last reception can be extrapolated from its target time.
• each day transmit a data record from each transmitter to the receiver become.
• the data transfers within the period until the next scheduled transfer, d. H. repeated five times within one day.
• the respective data transfers take place in the times from zero to one, four to five , Eight to nine, twelve to one, four to five and 8 p.m. to 9 p.m. daily.
• the data transfers each take only a few tenths Seconds.
• the procedure is the serial numbers given in decimal numbers the transmitter (column 1 of the table) for distribution of the transmission times in accordance with column 2 of the table as Binary numbers are given, these are then reversed (column 3) and these inverted binary numbers are in turn indicated as decimal numbers according to column 4 of the table. These then designate the corresponding time of transmission.
• the transmission times can either be programmed into the receiver or "learned" through a test run. In later operation, the receiver can refrain from switching on the retransmission corresponding to this transmitter when a transmission is received; if a transmission has not been received, he can successively increase the time window for switching on the receiver during the following repetitions. It is also possible to provide a more or less strong variation of the transmission time in the transmitter during the last repetition of a day, e.g. B. by the fact that the transmission times are distributed without reversal or, in the reversal, some digits retain their old value despite the reversal, as a result of which a slight variation is achieved.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Arrangements For Transmission Of Measured Signals (AREA)
• Selective Calling Equipment (AREA)
• Apparatus For Radiation Diagnosis (AREA)
• Detection And Prevention Of Errors In Transmission (AREA)
• Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
• Recording Measured Values (AREA)
• Debugging And Monitoring (AREA)

Priority Applications (4)

Applications Claiming Priority (1)

Publications (2)

Family

ID=8238747

Family Applications (1)

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Cited By (2)

Citations (5)

• 1999
  • 1999-08-07 EP EP99115639A patent/EP1077438B1/fr not_active Expired - Lifetime
  • 1999-08-07 AT AT99115639T patent/ATE266236T1/de active
  • 1999-08-07 DE DE59909407T patent/DE59909407D1/de not_active Expired - Lifetime
  • 1999-08-07 DK DK99115639T patent/DK1077438T3/da active

Patent Citations (5)

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