EMS memory management process for IEC61850 with buffer report

Abstract

The invention discloses a memory manage method for the IEC 61850 with a buffer report, when generating a report and to buffer memory, continuously allocating memory from the low address of the freebuf, if the space is not enough, cycling the following two courses, (1)if free space is not at the tail of the buffer, releasing the report entered the buffer earliest, cycling the course until the condition is not tenable, then carry out the course(2); (2)if the free space is at the tail of the buffer, the space is united in the recent report, the bulk of the freebuf is 0 after united, continuing to cycle (1); if the condition of the course(2) is not tenable, it will be determined that the bulk of the free space can satisfy the bulk of the cashe report. The generating of the memory fragmentation is stopped fundamentally; the use ratio of the memory is high. When the client requires to clear the report buffer, it is just the reinitialization of some variables, the memFree of the existing report is not involved.

Description

technical field [0001] The invention relates to an IEC 61850 memory management method with buffer report, which belongs to the field of power system automation. Background technique [0002] IEC 61850 is a system communication standard for digital substations, and report with buffer is an important service model provided by IEC61850. According to the IEC 61850 standard, the report generated by the buffered report control block should be buffered to support the client to request the server to retransmit the report through the corresponding service. Effective management of buffered reports within the installation has a significant impact on the functionality, security and efficiency of the system. At present, there are mainly the following methods for memory management of buffered reports: [0003] (1) A certain number of fixed-length buffers are adopted, and the size of each buffer is limited to the maximum length report that can accommodate the system. Although this metho...

AI Technical Summary

Problems solved by technology

This method uses the memory pool of the system. Although the utilization rate of memory is high, it is easy to generate memory fragmentation.

[0007] These methods need to release buffers sequentially when cleaning up buffered reports. In the case of a large number of buffered reports, the time-consuming is more obvious.

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