Time start in the forward path
First Claim
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1. A method of synchronizing timing of communications between a software module and a host card, the method comprising:
- reading a time start message in a header of a page of data received from the software module; and
transmitting the page of data when the time start message matches a time of a time clock in the host card.
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Abstract
The synchronization of timing between devices in a communication system is presented. In particular, in one embodiment, a method of synchronizing timing of communications between a software module and a host card in a forward direction is presented. The method comprises reading a time start message in a header of a page of data received from the software module and transmitting the page of data when the time start message matches a time of a time clock in the host card.
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Citations
30 Claims
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1. A method of synchronizing timing of communications between a software module and a host card, the method comprising:
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reading a time start message in a header of a page of data received from the software module; and
transmitting the page of data when the time start message matches a time of a time clock in the host card. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of synchronizing the time of communications in a communication system, the method comprising:
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calculating a time start message based in least in part on a time stamp in a received page of data and a delay;
embedding the time start message in a header of a transmit page containing data samples;
comparing the time start message with a then current time from a time clock in an interface card; and
when the time start message matches the then current time of the time clock within a select tolerance, transmitting the data samples to a remote head. - View Dependent Claims (12, 13)
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14. A host card for a communication system, the host card comprising:
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at least one inbound buffer adapted to receive pages of data samples from a processing module, each page of data including a time start message in a header;
a time clock;
compare circuitry adapted to compare a then current time from the time clock with a time start message in a header of a page of data; and
a transmit engine associated with each inbound buffer, each transmit engine adapted to transmit an associated page of data when the compare circuitry determines that the then current time matches a time start message in a header of the page of data. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A communication system comprising:
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a radio head unit adapted to transmit and receive data samples from one or more communication devices; and
a server in communication with the radio head card, the server including, a call processing module adapted to process communication signals, and at least one interface card in communication with the call processing module, each interface card including a synchronization circuit adapted to synchronize the timing of communication signals between the call processing module and the interface card. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A communication system, the communication system comprising:
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a means for determining a time to start transmission of a page of data samples;
a means for embedding a time start message of the time to start transmission of the page of data in a header of the page of data;
a means of comparing the time start message with a time of a time clock in a host card; and
a means of transmitting the page of data when the time start message matches the time of the time clock within select tolerances.
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28. A method of operating a communication system, the method comprising:
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coupling data samples to at least one transmit buffer;
monitoring each transmit buffer for buffer underflow conditions; and
when an underflow condition is encountered, replacing valid data samples with underflow zero data samples. - View Dependent Claims (29, 30)
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Specification