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Dynamic storage management method for cell header conversion table

A technology of dynamic storage and management method, applied in the field of ATM cell switching management mechanism, can solve the problems of limiting the overall performance of the switch, limiting the number of connections established, low storage space utilization, etc., and achieves improved efficiency, effective storage management, simplified effect of steps

Inactive Publication Date: 2003-04-09
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

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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

[0035] A better embodiment of the present invention is provided below according to Fig. 1-3.

[0036] First refer to Figure 1, which shows the relationship between the input conversion table 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 It took several conversions to complete. Because if the conversion is done with only one conversion, then the required conversion tablespace 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),...

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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 sizeof 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 connectionimaged 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 the input translation table (Input Translation Table-ITT) in the ATM (Asynchronous Transfer Mode) switching system adopting the shared memory type switching structure, specifically, relate to the exchange of the ATM cell in the switch field 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 ...

Claims

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Application Information

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