Control method and device for automatically sending ieee1588 protocol message
A protocol message and automatic sending technology, applied in the direction of synchronization devices, digital transmission systems, electrical components, etc., can solve the problems of increased number of CPU responses, decreased system synchronization performance, slow convergence of clock synchronization, etc., to achieve current limiting processing, The effect of reducing the burden and reducing the burden
Inactive Publication Date: 2011-12-28
FENGHUO COMM SCI & TECH CO LTD
View PDF2 Cites 26 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When dealing with a multi-service port clock synchronization system, the number of CPU responses will increase greatly with the increase of the number of service ports and service types, thus consuming a heavy CPU burden, which will lead to a decrease in system synchronization performance or a high CPU cost. cost
Furthermore, in existing wireless communication application scenarios, in some devices that can only achieve master-slave synchronization through PTP messages, the synchronization convergence time is severely restricted by the low rate of software sending PTP messages in traditional methods, resulting in master-slave synchronization. , Slow convergence of slave clock synchronization
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0032] The control method that the embodiment of the present invention provides automatically sends IEEE1588 agreement message, comprises the following steps:
[0033] A. The master device periodically generates a synchronous simplified message including the reserved sending timestamp field and the reserved sending sequence identification ID field through the built-in hardware automatic PTP message sending engine of the corresponding port. After the modified SequenceId (sequence identification ID) The value and insert the time stamp time T1 to form a synchronization message, and then send it periodically in the form of multicast, and the corresponding slave device receives the synchronization message and records the time stamp time T2;
[0034] B. The slave device sends a delay request Delay_Req message to the master device, and records the se...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a control method and device for automatically sending IEEE1588 protocol messages. The device includes a PCS receiving and adapting module, a PTP receiving time stamp extracting module, a PTP receiving and processing module, a PCS sending and adapting module, a time synchronization processing module, and a CPU Interface, PTP sending processing module and PTP sending parameter correction module, the PTP sending processing module is used to generate automatic PTP sending messages and send PTP messages to ports, automatically generated PTP sending messages, and port MAC sending cached Ethernet service messages The three documents are sent to the PTP transmission parameter correction module after arbitration; the PTP transmission parameter correction module is used to process or transparently transmit the message sent by the PTP transmission processing module after arbitration processing according to the message type instruction. The invention can reduce the load of the CPU to process the synchronous message, and accelerate the clock synchronous convergence speed of the master and slave devices.
Description
technical field [0001] The invention relates to the field of integrated circuits, in particular to a control method and device for automatically sending IEEE1588 protocol messages. Background technique [0002] In the communication network, Ethernet has become the main development direction of the communication bearer network due to its superior cost performance, wide range of products and applications, high technology maturity and high transmission rate of sustainable evolution. In order to adapt to the inevitable trend of business IP-based development and meet the different needs of different services for synchronization, the synchronization network has become an indispensable part of the packet switching network. The normal operation of many services requires precise clock synchronization, that is, the time or frequency difference between various devices in the entire network must be kept within a reasonable error level. [0003] The IEEE1588 protocol (the 1588 time sync...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H04L7/00H04L12/56H04L12/801
CPCH04J3/0667H04J3/0697
Inventor 方继通梁元涛方琼
Owner FENGHUO COMM SCI & TECH CO LTD