Patent ID: 7362740
Filing Date: 2008-04-22
Classification: G06F,H04J,H04W

Abstract:
1. An arrangement with a number of mobile units that can communicate with each other via a wireless connection system for transmission of messages which comprise control information and/or data, wherein the mobile units have access to an actual transmission medium in sequential time intervals, at the intervals where the units are actuated for their respective transmissions and receptions by means of a time slot system, the arrangement comprising: a time reference system; an algorithm for time slots for transmission, reception and frequency jumping; the mobile units are pre-synchronized to a respective reference time area of respective local networks before entering the respective local networks and synchronized across at least two geographically separated local networks; and at least one of the following: a) in that the arrangement comprises a network area in which the mobile units exercise their communication in a network, in that the respective mobile units are adapted to identify and receive information related to a radio protocol including rules for the time slots and selection of frequencies in the time slot system and type information on the time reference system that is valid for the arrangement, in that the arrangement also includes a reference time area, which works with said time reference system, in that at least one mobile unit is adapted to identify said reference time area and synchronize itself to a reference time by means of said type information, in that said at least one mobile unit is adapted to set its own internal clock in dependence on the reference time and to cause a time generating function in the communications between the mobile units within the local network area, and in that the reference time is adapted to be separated or independent from said communications of the mobile units in the local network; and/or b) in that first mobile units are included in at least two geographically separated local networks, in that the respective local network includes reference time area, in that the respective reference time area is adapted with a time reference system selected from among a number of possible time reference systems, in that a respective mobile unit of second mobile units comprises or constitutes a mobile unit in a stationary local network or at least one of a mobile unit and a stationary unit in a mobile network, in that the respective mobile unit of the second mobile units is adapted to identify respective reference time area and receive type information about the time reference system, and in that at least one of said second mobile units is adapted to have its internal clock at least one of set or actuated by said reference time and is adapted to be separated from or independent of the communications of the mobile units in respective networks.