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Arrangement with a number of units that can communicate with each other via a wireless connection system and a method for use with such a system

  • US 20040023678A1
  • Filed: 09/08/2003
  • Published: 02/05/2004
  • Est. Priority Date: 09/12/2000
  • Status: Active Grant
First Claim
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1. An arrangement with a number of units that can communicate with each other via a wireless connection system for transmission of messages which comprise control informations (commands) and/or data, and wherein the units have access to an actual transmission medium in sequential time intervals, at the intervals of which the units can be actuated for their respective transmissions and receptions by means of a time slot system, characterized by one or both of the following alternatives;

  • a) in that the arrangement comprises a network area, in which the units exercise their communication in a network, in that the respective unit is adapted to identify and receive information related to a radio protocol including ruels for time slots and selection of frequencies in the time slot system and information of a used type of a time reference system, for example GPS, valid for the arrangement, in that the arrangement also includes an reference time area, which works with the said time reference system, in that at least one unit is adapted to identify said reference time area and synchronize itself to the reference time by means of said type information, in that said at least one unit is adapted to set its own internal clock in dependence of the reference time and to cause a time generating function in the communications between the units within the network area, and in that the reference time in such a way is adapted to be separated or independent from said communications of the units in the network, b) in that first units are adapted to establish or be included in two or more geographically separated local networks, in that respective local network includes a reference time area, in that respective reference time area is adapted with a time reference system, for example GPS, selected among a number of possible time reference systems, and in that respective unit of second units comprises or constitutes a mobile unit in a stationary local network or a mobile or stationary unit in a mobile network, in that the respective unit of the second units is adapted to identify respective reference time area a and receive information about its valid type of the time reference system, and in that at least one of said second units is adapted to have its internal clock set or being actuated by said reference time, which in such a way is adapted to be separated from or independent of the communications of the units in respective network.

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