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Dynamic storage management method for cell header conversion table

A dynamic storage and management method technology, applied in the field of ATM cell exchange management mechanism, can solve the problems of limiting the overall performance of switches, low storage space utilization, and limiting the number of connection establishments, so as to improve efficiency, effectively store management, and simplify The effect of steps

Inactive Publication Date: 2005-11-23
ZTE CORP
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Problems solved by technology

[0005] In the currently adopted ATM switching system of the shared memory switching structure, a variety of cell header conversion and storage management mechanisms are used, among which the access method of fixed length space is used most, which uses a fixed length for free blocks. Size allocation, although the access speed is relatively fast, but the utilization rate of storage space is very low, and the waste is also serious, which limits the number of connections established, thus limiting the overall performance of the switch

Method used

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  • Dynamic storage management method for cell header conversion table
  • Dynamic storage management method for cell header conversion table
  • Dynamic storage management method for cell header conversion table

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Embodiment Construction

[0038] The following is based on Figure 1-3 A preferred embodiment of the present invention is given.

[0039] see first figure 1 As shown, it gives the relationship between the input conversion tables of the cell header. In the ATM switching system using the shared memory switching structure, the analysis and conversion of the cell header are not completed at one time, but need to go through multiple conversions. to complete. Because if the conversion is completed only once, the required conversion table space is 2**(VPI length+VCI length), that is, 2**28=256M. To occupy such a large storage space, the general switching network system cannot satisfy. The multiple conversion of the cell header is based on the premise that not all 256M connections exist at the same time, so such a large storage space is not needed. The conversion of the cell header involves the following input conversion tables at the input end: the cell header input port table 11 (Port Mode Table, PMT), t...

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Abstract

A dynamic storage management method for a signal element head converter includes distributing ITT list storage space and recover, among which suitable steps of buddy system should by mainly selected, first the ITT list space is cut into a group of space blocks from big to small arrange in sequence and an independent ITT idle block chained list is preserved for each space block to recall same size of idle blocks and to set up the said connection ITT list items when setting up input / output logic channel connection. When connection is dismantled, if the said connection is not the last connection imaged in ITT space block, then it is cancelled directly.

Description

technical field [0001] The present invention relates to a kind of dynamic storage method of cell header conversion table (Input Translation Table——ITT) in the ATM (Asynchronous Transfer Mode) switching system adopting the shared memory type switch structure, specifically, relate to the ATM cell in the switch field Exchange management mechanism. Background technique [0002] Due to the rapid development of communication technology and communication services towards broadband, ATM technology, which can provide not only non-real-time data services, but also real-time telephone and video services, has quickly become a communication network platform for media information exchange and broadband transmission services. [0003] The ATM network is a connection-oriented communication network, and the end-to-end connection is established before the network communication starts, and each ATM cell is transmitted independently in the network. The essence of ATM cell switching is to outpu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/40H04Q3/00
Inventor 周云
Owner ZTE CORP
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