Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2001-02-27
2003-08-19
Baderman, Scott (Department: 2184)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C712S300000
Reexamination Certificate
active
06609218
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a method and device for analyzing data in a protocol analyzer.
In many areas of information processing there are data structures to be analyzed. Such analysis is done on the basis of specified descriptions with the aim being to recognize the data structure, to allow processing of the individual elements separately as components of a message, and to use the values of the elements in further steps. Such data structures may be any bit sequences generated by different sources. Particularly in telecommunications there are high data transfer rates of such bit sequences in the form of protocol messages, with the relevant protocol describing the structure of the data. This involves breaking up the data into units known as protocol data units (PDUs).
FIG. 1
shows a procedure for analyzing the data in accordance with the current state of the art. In Step
1
data are stored in an unstructured fashion, i.e., without any order in the sequence of their transfer, in a memory unit such as a random access memory (RAM). Software is used to compare the unstructured data with a structure description, such as a protocol description. Depending upon the result of the comparison, forms of togetherness and meanings are allocated to the individual data. For example the data in field
14
of Step
2
may define the meaning “name” for the data in field
16
, the data in field
18
may allocate the meaning “address” to the data in field
20
, while the data in field
22
may allocate the meaning “telephone number” to the data in field
24
. In line with the progress of the comparison the disordered data structure is processed sequentially by the software and the protocol structure is built up step by step as shown in Step
3
. In this structure the data are now arranged in an orderly fashion as desired, with field
26
showing the data following in field
28
to be a name, field
30
showing the data following in field
32
to be an address, and field
34
showing the data following in field
36
to be a telephone number. By means of a register it is possible, as indicated by arrows, to obtain access to the data arranged in an orderly fashion. Since the data are arranged in an orderly fashion, the register may always access the same positions when a certain type of information is requested from a terminal.
The disadvantage of this procedure, as is well known in the art, is the extensive time and computation effort required for this type of data preparation.
What is desired is a method and device for analyzing data that is simpler and less time consuming than those procedures described above in order to gain quicker access to the data.
BRIEF SUMMARY OF THE INVENTION
Accordingly the present invention provides a method and device for analyzing data in which the unstructured data is read into a memory, the unstructured data is then compared with a structure description to identify components of the unstructured data, and an addressing logic is initialized in accordance with the identified components of the unstructured data. A register is coupled to the addressing logic to serve as an interface for access to the unstructured data based on the identified components.
The objects, advantages and other novel features of the present invention are apparent from the following detailed description when read in conjunction with the appended claims and attached drawing.
REFERENCES:
patent: 5347524 (1994-09-01), I'Anson et al.
patent: 6000041 (1999-12-01), Baker et al.
patent: 6209087 (2001-03-01), Cashman et al.
patent: 0800299 (1997-10-01), None
patent: WO 00/10304 (2000-02-01), None
Baderman Scott
Gray Francis I.
Tektronix International Sales GmbH
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