Apparatus and method for synchronizing a rural wireless fixed access unit into a TDMA system
First Claim
Patent Images
1. A method of synchronizing a fixed access unit into a time division multiple access (TDMA) system comprising the steps of:
- receiving a first timing advance channel time slot at the fixed access unit;
sending a message over a second timing advance channel time slot, said message advanced in time by an offset value with respect to said first timing advance channel time slot;
receiving an acknowledgment from the TDMA system that said message was received; and
advancing a subsequently transmitted communication based on the offset value.
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Abstract
A method of synchronizing a fixed access unit (16) into a time division multiple access (TDMA) system (10). The method includes the steps of receiving a first timing advance channel time slot (86) at the fixed access unit (16), sending a message advanced in time by an offset value over a second time slot (88), receiving an acknowledgment from the TDMA system (10) that the message was received, and advancing a subsequently transmitted communication based on the offset value.
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Citations
14 Claims
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1. A method of synchronizing a fixed access unit into a time division multiple access (TDMA) system comprising the steps of:
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receiving a first timing advance channel time slot at the fixed access unit; sending a message over a second timing advance channel time slot, said message advanced in time by an offset value with respect to said first timing advance channel time slot; receiving an acknowledgment from the TDMA system that said message was received; and advancing a subsequently transmitted communication based on the offset value. - View Dependent Claims (2, 3, 4, 5)
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6. A method of synchronizing a rural wireless fixed access unit with a communication unit in a time division multiple access system comprising the steps of:
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transmitting a broadcast message over a timing advance channel; receiving a request for service message from the rural wireless fixed access unit over the timing advance channel; transmitting an acknowledge message over the timing advance channel to the rural wireless fixed access unit the acknowledge message including an offset value based on a distance between the rural wireless fixed access unit and the communication unit; and receiving a communication message from the wireless fixed access unit, a timing of the communication message advanced based on the offset value. - View Dependent Claims (7, 8, 9)
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10. A communication unit of a time division multiple access system comprising:
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a transmitter; a receiver; a controller in communication with the transmitter and the receiver, said controller defining a first timing advance channel by marking an idle time slot as a timing advance channel time slot; said transmitter sending a broadcast message over the first timing advance channel; said receiver detecting a request for service message from a fixed access unit over a second timing advance channel; and said transmitter sending an acknowledge message over the first timing advance channel to the fixed access unit. - View Dependent Claims (11)
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12. A rural wireless fixed access unit communicating with a time division multiple access (TDMA) system comprising:
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an antenna; a receiver coupled to the antenna, said receiver receiving a first timing advance channel time slot; and a transmitter coupled to the antenna, said transmitter sending a message over a second timing advance channel time slot the message having been advanced in time by an offset value, the receiver receiving an acknowledgment from the TDMA system that said message was received by the TDMA system and the transmitter advancing a subsequently transmitted communication based on the offset value. - View Dependent Claims (13, 14)
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Specification