Method and arrangement for radio communication
First Claim
1. A method of synchronizing a plurality of peer radio transceivers comprising the steps of:
- arranging the plurality of transceivers which use a common air interface into a number of transceiver arrangements with each transceiver arrangement comprising at least two transceivers communicating via a radio link;
establishing a common synchronization signal among the transceivers, the signal being formed by superposed beacon pulses and having at least two parts; and
synchronizing a transceiver in a transceiver arrangement to one of said synchronization signal parts, the synchronized transceiver then contributing to another of said synchronization parts.
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Accused Products
Abstract
The present invention relates to a method and arrangement in an ad-hoc network for synchronizing a multiple of radio transceiver arrangements with different characteristics that make use of a common air interface. Each transceiver arrangement comprises at least two transceivers which mutually communicate via a radio transmission link. All transceivers synchronize to a common synchronization signal comprising two staggered beacon pulse series signals (TX1, TX2) which have the same repetition rate. The transceivers synchronize their internal timers which control the signal transmission from the transceivers, to the strongest one of the two beacon pulse series signals (TX1, TX2) by listening during one of the corresponding sets of time windows (RX1, RX2). Between the reception of two beacon pulses, each transceiver transmits beacon pulses itself, thus contributing to the generation of the other beacon pulse series signal, on which other transceivers can lock.
468 Citations
34 Claims
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1. A method of synchronizing a plurality of peer radio transceivers comprising the steps of:
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arranging the plurality of transceivers which use a common air interface into a number of transceiver arrangements with each transceiver arrangement comprising at least two transceivers communicating via a radio link; establishing a common synchronization signal among the transceivers, the signal being formed by superposed beacon pulses and having at least two parts; and synchronizing a transceiver in a transceiver arrangement to one of said synchronization signal parts, the synchronized transceiver then contributing to another of said synchronization parts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of obtaining orthogonal radio channels in a network having multiple transceiver arrangements with each arrangement comprising at least two transceivers communicating via a radio link, said method comprising the steps of:
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synchronizing each transceiver to a common synchronization signal; defining time slots by dividing a time scale into intervals; and allocating time slots for each radio link wherein at least one transceiver of said transceiver arrangement is induced to transmit beacon pulses according to a corresponding internal timer during a transmitting step wherein the beacon pulses are superposed so that they form beacon pulse series signals which are superposed to form the synchronization signal. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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- 21. A synchronization apparatus comprising a plurality of transceiver arrangements each comprised of at least two peer transceivers communicating via a radio link wherein the transceiver arrangements use a common air interface and lock to one part of a common synchronization signal while contributing to at least one other part of said common synchronization signal, the common synchronization signal being formed by superposed beacon pulses.
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29. A method for synchronizing a transceiver arrangement in a radio network wherein the transceiver arrangement comprises at least two transceivers communicating via a radio link and each transceiver comprises an internal timer, said method comprising:
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a scanning step in which each transceiver is induced to scan for a first synchronization signal segment; a synchronization step in which each of said transceivers is induced to synchronize a corresponding internal timer to said strongest available synchronization signal; and a transmitting step in which at least one transceiver of said transceiver arrangement is induced to transmit a second synchronization signal segment, different from said first synchronization signal segment, according to a corresponding internal timer wherein the second synchronization signal segment contributes to a common synchronization signal, the common synchronization signal being formed by superposed beacon pulses. - View Dependent Claims (30, 31, 32, 33)
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34. A method for synchronizing a transceiver arrangement in a radio network wherein the arrangement comprises at least two transceivers communicating via a radio link and each transceiver comprises an internal timer, the method comprising:
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a scanning step, in which each transceiver is induced to scan for a strongest available synchronization signal; and a synchronization step, in which each of said transceivers by which the presence of said strongest available synchronization signal can be established, is induced to synchronize a corresponding internal timer to said strongest available synchronization signal wherein the synchronization signal comprises at least two beacon pulse series signals each comprising a superposition of beacon pulses generated by at least two radio transceivers.
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Specification