Test unit with programmable transmit timing for telecommunication systems
First Claim
1. A method for transmitting a reverse-link signal from a test unit over a hard-wire connection to a base station of a communication system, the base station having a search window used to scan for the reverse-link signal, wherein the test unit delays transmission of the reverse-link signal by a specified non-zero transmission delay in order for the reverse-link signal to arrive at the base station within the base station search window.
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Accused Products
Abstract
The test unit delays its transmission of a reverse-link signal over the hard-wire connection to a base station by a specified transmission delay in order to ensure that the reverse-link signal is received at the base station within the base station search window. The present invention is especially useful in configurations in which the base station advances the timing of its forward-link signals to account for delay between the base station and its antennas and where there is a relatively large distance between the base station and its antennas. In such a configuration, without the transmission delay of the present invention, a reverse-link signal transmitted by a test unit over the hard-wire connection to the base station may arrive at the base station before the start of the base station search window, in which case, the test unit would not be able to initiate or maintain communications with the base station.
53 Citations
24 Claims
- 1. A method for transmitting a reverse-link signal from a test unit over a hard-wire connection to a base station of a communication system, the base station having a search window used to scan for the reverse-link signal, wherein the test unit delays transmission of the reverse-link signal by a specified non-zero transmission delay in order for the reverse-link signal to arrive at the base station within the base station search window.
- 11. A test unit for transmitting a reverse-link signal over a hard-wire connection to a base station of a communication system, the base station having a search window used to scan for the reverse-link signal, wherein the test unit is configured to delay transmission of the reverse-link signal by a specified non-zero transmission delay in order for the reverse-link signal to arrive at the base station within the base station search window.
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21. A method for transmitting a reverse-link signal from a test unit over a hard-wire connection to a base station of a communication system, the base station having a search window used to scan for the reverse-link signal, wherein the test unit delays transmission of the reverse-link signal by a specified non-zero transmission delay in order for the reverse-link signal to arrive at the base station within the base station search window, wherein a different transmission delay is defined for each different carrier frequency supported by the test unit.
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22. A method for transmitting a reverse-link signal from a test unit over a hard-wire connection to a base station of a communication system, the base station having a search window used to scan for the reverse-link signal, wherein the test unit delays transmission of the reverse-link signal by a specified non-zero transmission delay in order for the reverse-link signal to arrive at the base station within the base station search window, wherein:
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the communication system conforms to an IS-95 standard; and
the communication system is a wireless-over-cable system or a fiber microcell system.
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23. A test unit for transmitting a reverse-link signal over a hard-wire connection to a base station of a communication system, the base station having a search window used to scan for the reverse-link signal, wherein the test unit is configured to delay transmission of the reverse-link signal by a specified non-zero transmission delay in order for the reverse-link signal to arrive at the base station within the base station search window, wherein a different transmission delay is defined for each different carrier frequency supported by the test unit.
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24. A test unit for transmitting a reverse-link signal over a hard-wire connection to a base station of a communication system, the base station having a search window used to scan for the reverse-link signal, wherein the test unit is configured to delay transmission of the reverse-link signal by a specified non-zero transmission delay in order for the reverse-link signal to arrive at the base station within the base station search window, wherein:
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the communication system conforms to an IS-95 standard; and
the communication system is a wireless-over-cable system or a fiber microcell system.
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Specification