Abstract:
A message analysis device is described including a storage device, display device, and a selection device. The storage device can be used to store messages in a file in chronological order, and the a display device can be used to display at least one first and one second window. One part of the messages, which are chronologically stored in the file, can be displayed in the first window. The selection device can be used to select at least one message to be displayed in the second window, corresponding to a parent and/or child generation of a specific message. Accordingly, information can be evaluated from a message header to determine and represent those parent-generation messages that causally triggered a specific message and/or those child-generation messages that are causally determined by the specific message.

Description:
FIELD OF THE INVENTION  
       [0001]     The invention relates to a message analysis device and a method for displaying causally related messages.  
       BACKGROUND OF THE INVENTION  
       [0002]     In the development of new appliances or software generations for existing appliances, it is necessary to check the results of the development by means of the message flow. From the consequently obtained findings, conclusions can be drawn with respect to defective developments or possible improvements can be proposed. In order to enable an analysis of the message flow, it is normal to store the messages occurring for example in an end system of a communications system, such as mobile radio, in a file. In the case of an end system constructed for example according to the OSI reference model, messages are generated thereby between various layers of the reference model on the basis of the provided services. These messages are written either directly from the layers into the file or by means of a so-called “framework” which is provided separately for this purpose.  
         [0003]     With respect to the OSI reference model, reference may be made for example to Jürgen Göbel, “Communications Technology”, ISBN 3-7785-3904-3, 1999, part I, pages 713-753.  
         [0004]     On the basis of the described mode of operation, the messages are arranged in the file in chronological sequence. By means of an analyzer, it is possible to view a thus generated file. The messages stored in the file are displayed in tabulated form and can be analyzed by a developer.  
         [0005]     It is disadvantageous in the described system that the tabulated display of the individual messages offers no insight into the causal connections of the messages. Hence, it is extremely difficult for a developer to analyze the message flow since it itself must look for messages which are related with respect to content. With the multiplicity of messages, which are stored in such a file, this leads to a considerable time and hence also cost outlay.  
       SUMMARY OF THE INVENTION  
       [0006]     A need therefore exists to produce a message analysis device and a method for displaying messages, with which the message flow of causally related messages can be analyzed simply, and also to indicate a corresponding computer program and computer program product.  
         [0007]     In the case of the message analysis device according to the invention and also in the case of the method for displaying related messages, it is advantageous that, in conjunction with the message, information stored in the file is used for the purpose of selecting a plurality of messages which are connected to each other causally. In this manner, it is possible to detect with a glance which further messages are connected to a specific message because they were generated for example as a consequence of the specific message. With respect to the time scale, such a mode of operation is possible in both directions so that not only succeeding messages, generated on the basis of a specific message, can be displayed but likewise messages preceding the specific message are displayed.  
         [0008]     It is particularly advantageous according to a development of the invention that, in addition to the messages, directly preceding and succeeding the specific message, which are designated as messages of the parent generation or respectively of the child generation, the in turn preceding or respectively succeeding messages can be displayed. Due to the feedback of the thus displayed generations of messages, it is advantageous in addition that, in the case of a selection of a specific further message for the display of the chronological listing of messages, that sequence is selected which contains the specific further message. Hence, a detailed analysis can be undertaken not only with respect to the sequence of messages which have a causal connection but also with respect to the individual, causally connected messages.  
         [0009]     Still other aspects, features, and advantages of the present invention are readily apparent from the following detailed description, simply by illustrating a number of particular embodiments and implementations, including the best mode contemplated for carrying out the present invention. The present invention is also capable of other and different embodiments, and its several details can be modified in various obvious respects, all without departing from the spirit and scope of the present invention. Accordingly, the drawing and description are to be regarded as illustrative in nature, and not as restrictive. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]     A preferred embodiment of the invention is represented in the drawings and is explained in more detail by means of the subsequent description. There are shown:  
         [0011]      FIG. 1 a  schematic illustration of the structure of a message with a modular structure;  
         [0012]      FIG. 2 a  temporal sequence of a plurality of generations of messages;  
         [0013]      FIG. 3  an illustration of a first screen view with messages of a parent and of a child generation;  
         [0014]      FIG. 4 a  second illustration of a screen view with messages of a parent and of a child generation;  
         [0015]      FIG. 5  an illustration of a screen view with messages of a child generation and messages of a succeeding generation;  
         [0016]      FIG. 6  an illustration of a screen view with a message of a parent generation and also of a generation preceding the parent generation; and  
         [0017]      FIG. 7 a  block diagram of the message analysis device according to the invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0018]     Before an example of the message analysis device according to the invention is explained by means of  FIG. 3  to  6 , firstly the structure of messages with a modular structure is intended to be explained by means of  FIG. 1  for better comprehension.  
         [0019]     A message  1 , as is generated for example in the case of service provision by one of the layers according to the OSI reference model, comprises a plurality of segments which are designated in  FIG. 1  with  1 . 1 ,  1 . 2 ,  1 . 3 ,  1 . 4  and  1 . 5 . For the first segment  1 . 1 , a further division into blocks  1 . 1 . 1 ,  1 . 1 . 2 ,  1 . 1 . 3 ,  1 . 1 . 4  and  1 . 1 . 5  is illustrated. The remaining segments of the complete message  1  can likewise be divided into such blocks. The individual blocks of the segment  1 . 1  of the message  1  can likewise in turn be sub-divided into smaller units  1 . 1 . 4 . 1 ,  1 . 1 . 4 . 2  and  1 . 1 . 4 . 3 . Due to the illustrated sub-division into ever smaller information units, a hierarchical system of a message  1  is produced, which system reflects their modular structure. The messages I to be analyzed by the present invention have such a modular structure, the combination of individual modules into superordinate structures on the basis of a logical relationship of modules being undertaken. The messages  1  represent for example elements of a data stream which is exchanged between a base station and a mobile radio station in a cellular mobile radio network.  
         [0020]     In  FIG. 2 , starting from a specific message  1 , a message flow over a plurality of generations is illustrated. A message  2  of a parent generation preceded the message  1 . The specific message  1  itself has been triggered on the basis of the content of the message  2  of the parent generation. As illustrated by the connection lines, the message  1  is in turn the cause of the triggering of further messages  3 . 1 ,  3 . 2 ,  3 . 3  and  3 . 4  which belong to a child generation. The messages  3 . 1  to  3 . 4  of the child generation can for their part be responsible in turn causally for triggering further messages  4 . 1 ,  4 . 2  and  4 . 3  as is illustrated by way of example for the message  3 . 3  of the child generation.  
         [0021]     Due to the grouping of the individual messages, which are connected causally with respect to the generation sequence, a temporal sequence of the messages is produced which is indicated by means of a time axis  5 . The messages  3 . 1 ,  3 . 2 ,  3 . 3  and  3 . 4  of the child generation or respectively the succeeding messages  4 . 1 ,  4 . 2  and  4 . 3 , which are arranged simultaneously in the illustration, are listed however in the file in succession. Correspondingly, the entries are also displayed in succession in a tabulated overview. Between the individual messages of the various generations, which are illustrated in  FIG. 2 , a multiplicity of other messages is stored in the file. The temporal conjunction of such messages is extensively random so that, on the basis of the multiplicity of messages generated within the shortest time, the causal connection between individual messages is not detectable in the chronological listing.  
         [0022]     In  FIG. 3 , a representation of a screen view of the message analysis device is shown. A first window  6  is detectable in the screen display in which window a multiplicity of messages corresponding to their chronological sequence, which corresponds to the sequence of entries in the file, are listed. By selecting a message by means of a suitable selection medium, e.g. a computer mouse, a specific message  24  is highlighted in the tabulated listing. The message  24  highlighted in bold corresponds to the message  1  from  FIG. 2 . If a message precedes the specific message  24 , on the basis of which the specific message  24  has been produced, then this preceding message, which is designated as a message  25  of the parent generation, is displayed in a second window  7 . The second window  7  is thereby sub-divided into a first region  7 . 1  and a second region  7 . 2 . The display of the message  25  of the parent generation is thereby effected in the first region  7 . 1 .  
         [0023]     If succeeding messages have been triggered on the basis of the specific message  24 , then these are displayed in the second region  7 . 2 . In the illustrated case example, the message  25  preceded the specific message  24 . On the basis of the specific message  24 , three further messages  26  were generated which are displayed in the second region  7 . 2  of the second window  7 . As can be detected in  FIG. 3  by means of the time entries  26 . 1  of the messages  26  of the child generation, the three messages  26 , which are associated with the child generation, do not occur simultaneously so that there is a high probability that, in the listing of the three messages  26  of the child generation in the file, a multiplicity of further messages is listed between the messages  26 .  
         [0024]     The columns of the table displayed in the first window  6  can be adjusted via a non-shown selection menu. In the illustrated example, the current number of the respective message in the file is displayed in a first column  13 . In a second column  14 , a real time is displayed at which the corresponding message was stored in the file. In two further columns  15 . 1  and  15 . 2 , the time is stored as internal time, for instance as system time. A fifth column  16  characterizes the side from which the message was sent, i.e. for example the base station or mobile telephone. Since the message analysis device is not connected to a specific protocol system, the respectively underlying protocol is mentioned in a sixth column  17 . The columns with the reference numbers  18  to  21  contain information which is produced by the layer-wise structure of the end system according to the OSI reference model. In a further column  22 , an ASP number is noted, by means of which the messages can be categorized, which therefore permits a non-unequivocal identification of an individual message. In a final displayed column  23 , an entry is provided under the title “references”, with which it can be determined whether a message triggering the message preceded the message.  
         [0025]     The sequence view of messages displayed in the first window  6  contains the information of the message head, the so-called header, as already indicated, the displayed information being able to be adjusted via a non-shown selection window. A structure display is displayed in a third window  8  for the message  24  highlighted respectively in the first window  6 . The individual hierarchical levels, which were mentioned already with respect to  FIG. 1 , are made obvious in the structure display by indentations. If the hierarchically subordinate levels for a specific element are intended to be on or off screen, then this can be carried out by clicking on the corresponding element in the display. In  FIG. 3 , such an element, with the reference number  35 , is displayed without displaying the subordinate hierarchical levels and also an identically constructed element  35 ′ with a display of all subordinate hierarchical levels.  
         [0026]     In a fourth window  9 , a detailed view of the highlighted message  24  is displayed. If the information to be displayed goes beyond the visible range of the fourth window  9 , then the displayed visible portion can be varied in the known manner by means of a scroll bar  10 . This applies analogously for the remaining windows  6 ,  7  and  8 .  
         [0027]     In  FIG. 4  an alternative display form of the chronological listing of the messages in the first window  6  is shown. The messages are in turn listed line-wise but, in contrast to the tabulated display of  FIG. 3 , origin and destination of the individual messages is displayed graphically. In addition to the two first columns  13 ′ and  14 ′, which correspond to the previously mentioned columns  13  and  14  in  FIG. 3 , further columns are illustrated which are designated with “RRC”, “RLC”, “MAC”, “PHY” and “Auxiliary”. Due to the corresponding arrangement of the information of a message in the corresponding column, for the highlighted message  24 , i.e. the column “MAC”, that layer in which the message is generated is immediately made clear graphically. Together with the direction arrow  36 , which is disposed thereunder, the destination of the respective message is also detectable. In the column “Auxiliary”, additional information is however contained. The information displayed in the third window relating to the structure of the message  24  differs from  FIG. 3  by means of the region of the display which is displaced by means of the scroll bar  10 .  
         [0028]      FIG. 5  shows a further display in the case where the highlighted message  24 ′, in addition to a plurality of messages  30  of the child generation which are indicated in the second region  7 . 2  of the second window  7 , contains yet further messages of a succeeding generation which were triggered on the basis of a message  30 . 1  of the child generation. This is made clear optically by the indented display in the second region  7 . 2 .  
         [0029]     In  FIG. 6 , the analogous case for a plurality of generations of preceding messages is illustrated so that a message  32  of the parent generation preceding the highlighted message  24 ″ was in turn triggered by a message  33  of the generation preceding the parent generation.  
         [0030]     In order to select messages which, in the described manner, have a causal connection with a specific message  24 ,  24 ′ or  24 ″ which is highlighted in the first window  6 , the header information is evaluated. In the header, entries are undertaken in the file during storage of the respective message, by means of which entries of the causal connection and hence the history of the individual messages can be reconstructed. By means of a selection device, the messages of parent or child generations, which are identified on the basis of the information of the header, are selected and displayed in the second window  7  in the first or second region  7 . 1  or  7 . 2 , dependent upon whether the respective message concerns a message of a preceding or succeeding generation.  
         [0031]     If in the second window  7  a message of the parent or of the child generation or other information displayed there is selected by means of a selection medium, then in the first window  6 , that part of the chronological listing of messages is automatically displayed which contains the newly selected message. The newly selected message is thereupon highlighted in the first window  6 . Corresponding to the newly highlighted message of the first window, the displays are updated in the remaining windows  7 ,  8  and  9 .  
         [0032]      FIG. 7  shows the total structure of the message analysis device according to the invention. The message analysis device comprises a storage device  36  in which a file  37  is stored, in which in turn the messages  38  are stored in chronological sequence. The messages  38  are stored in the file  37  via a non-displayed interface of the end system  39  which comprises for example the seven layers  40  of the OSI reference model. Furthermore, the message analysis device  35  has a selection device  41  which is connected to the storage device  36  so that the selection device  41  can access the file  37  of the storage device  36 . Corresponding to the above-described selection criterion, a selection of messages to be displayed from the file  37  is implemented by the selection device  41 , which messages preceded or succeeded a specific message which is highlighted in the first window  6  of the display device  42 , and is issued to the display device  42 . Corresponding to the information transmitted from the selection device  41  to the display device  42 , a display is effected in the second window  7 , as already explained in the description of  FIG. 3  to  6 .  
         [0033]     While the present invention has been described in connection with a number of embodiments and implementations, the present invention is not so limited but covers various obvious modifications and equivalent arrangements, which fall within the purview of the appended claims.