Time stamp in the reverse path
First Claim
Patent Images
1. A method of timing communications between a host card and call processing module, the method comprising:
- attaching a time stamp message to a page of data samples that indicates when a first one of the data samples was received by a receive engine in the host card;
passing the data samples and the time stamp message to the call processing module; and
synchronizing communications between the host card and the call processing module based at least in part on the time stamp message.
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Abstract
The synchronization of timing between devices in a communication system is presented. In one embodiment a method includes attaching a time stamp message to a page of data samples that indicates when a first one of the data samples was received by a receive engine in a host card. Passing the data samples and the time stamp message to a call processing module and synchronizing communications between the host card and the call processing module based at least in part on the time stamp message.
88 Citations
20 Claims
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1. A method of timing communications between a host card and call processing module, the method comprising:
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attaching a time stamp message to a page of data samples that indicates when a first one of the data samples was received by a receive engine in the host card;
passing the data samples and the time stamp message to the call processing module; and
synchronizing communications between the host card and the call processing module based at least in part on the time stamp message. - View Dependent Claims (2, 3, 4, 5)
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6. A method of synchronizing the time of communications in a communication system, the method comprising:
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reading a time clock used by an interface card when a first data sample in a group of receive data samples are received by the interface card;
attaching a time stamp message with the group of receive data samples, the time stamp message indicating the time read from the time clock;
transmitting the group of receive data samples and the time stamp message to a processing module; and
synchronizing communication between the interface card and the processing module based at least in part on the time stamp message. - View Dependent Claims (7, 8, 9, 10)
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11. A host card for a communication system, the host card comprising:
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at least one receive engine adapted to receive pages of data samples, a time clock; and
a synchronization circuit adapted to read the time clock when a first data sample in a page of data samples is received by the receive engine and attach a time stamp message to the page of data samples that indicates the time read. - View Dependent Claims (12, 13, 14, 15)
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16. 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 and the radio head unit, each interface card including, at least one receive engine adapted to receive pages of data samples, a time clock; and
a synchronization circuit adapted to read the time clock when a first data sample in a page of data samples is received by the receive engine and attach a time stamp message to the page of data samples that indicates the time read. - View Dependent Claims (17)
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18. A communication system, the communication system comprising:
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a means for determining when a first data sample in a page of data samples is received by a receive engine in a interface card;
a means for embedding a time stamp massage indicating when the first data sample was received in the page of data samples;
a means of passing the page of data sample including the time stamp message to a processing module; and
a means of using the time stamp message to synchronize communications between the interface card and the processing module. - View Dependent Claims (19, 20)
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Specification