Time stamp in the reverse path
AssigneeADC Telecommunications, Inc.
InventorsJohn Hedin, Donald Bauman, Jeffrey Cannon
Life of this patent
Estimating the term…
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.
Claims20
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.
A method of synchronizing the time of communications in a communication system, the method comprising:
- 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.
A host card for a communication system, the host card comprising:
- 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.
A communication system comprising:
- 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.
The communication system of claim, 16 further comprising:
- at least one outbound buffer adapted coupled between an associated receive engine and an output to a processing module.
A communication system, the communication system comprising:
- 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.
Dependencies are inferred from the claim text.