Method and apparatus for synchronizing frequency hopping transceivers
First Claim
1. A method of synchronising frequency hopping radio transceivers, comprisingtransmitting from a first transceiver a first message at least once on each of a first plurality of radio channels selected sequentially according to a first sequence;
- receiving in a second transceiver on simultaneous combinations of radio channels, said combinations having been selected sequentially from a second plurality of radio channels according to a second sequence, wherein the first and second plurality of radio channels have at least partial commonality, said radio channels of a simultaneous combination from among said combinations being received, in said receiving, simultaneously; and
,in response to receiving at the second transceiver the first message on any of the second plurality of radio channels, transmitting from the second transceiver a second message and aligning hop sequences of the first and second transceivers.
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Accused Products
Abstract
A slave radio transceiver for use in a frequency hopping radio system synchronizes by receiving on a sequence of simultaneous combinations of radio channels until a paging message is received from a master transceiver, and may then revert to single channel frequency hopping operation. The slave'"'"'s multi-channel receiver is sub-equipped to receive simultaneously on a only sub-set (PF12, PF13) of the channels within its bandwidth, the received channels being selected by independent programming within the bandwidth. The channels received simultaneously may be selected to correspond to different degrees of misalignment between the master and slave.
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Citations
17 Claims
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1. A method of synchronising frequency hopping radio transceivers, comprising
transmitting from a first transceiver a first message at least once on each of a first plurality of radio channels selected sequentially according to a first sequence; -
receiving in a second transceiver on simultaneous combinations of radio channels, said combinations having been selected sequentially from a second plurality of radio channels according to a second sequence, wherein the first and second plurality of radio channels have at least partial commonality, said radio channels of a simultaneous combination from among said combinations being received, in said receiving, simultaneously; and
,in response to receiving at the second transceiver the first message on any of the second plurality of radio channels, transmitting from the second transceiver a second message and aligning hop sequences of the first and second transceivers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of synchronizing hop sequences of frequency hopping radio transceivers, comprising
transmitting from a first transceiver a first message at least once on each of a first plurality of radio channels selected sequentially according to a first sequence at a first rate; -
sequentially selecting, from a second plurality of radio channels according to a second sequence at a second rate, different combinations of radio channels, of which a current combination is one, the first and second plurality of radio channels having at least partial commonality; receiving, in a second transceiver, simultaneously on the radio channels of said current combination; and
,in response to receiving at the second transceiver the first message on any of the second plurality of radio channels, transmitting from the second transceiver a second message and aligning hop sequences of the first and second transceivers.
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Specification