Patent ID: 6169730
Filing Date: 2001-01-02
Classification: H04B

Abstract:
A method for implementing a time division multiple access protocol for digital communications between a radio transceiver and a repeater, the method comprising the steps of: a) dividing a communication into a plurality of frames having a predetermined length of time; b) dividing each frame into: i) a plurality of downlink slots, each downlink slot for containing a transmission from the repeater to the transceiver; ii) a plurality of uplink slots, each uplink slot for containing a transmission from the transceiver to the repeater; iii) wherein each of the downlink and uplink slots are divided into: (a) a bit synchronization for timing acquisition field; (b) a slot field for slot acquisition; (c) a header field for control information, wherein the header field is further divided into: (i) a message type field for identifying a message type; (ii) a message subtype field for identifying a point-to-point mode of communication; (iii) an user-programmable ID field for identifying sending/receiving transceivers; (iv) a reserved field for providing subsequent additional protocol information; (v) a first modifier field for identifying communication channels; (vi) a second modifier field for identifying available uplink slots and current active slots; (d) a data field for digital audio and digital data information; (e) a 16-bit CRC field for error detection; (f) a slot gap field for accommodating clock inaccuracies; and c) transmitting the communication.