JPH0583013B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a line setting check method for a time division multiplex system, and more particularly to a line setting check method for a time division multiplex system in which line settings are possible. [Prior Art] When checking the line settings of a time division multiplex system that transmits information by time division multiplexing, a time division multiplex device serving as a control station of the time division multiplex system, an external control device, or a human being Check when configuring line settings all at once. and,
Based on this, necessary line setting information is transferred to each time division multiplexing device. Such a centralized line check system is used in time division multiplex systems. [Problems to be Solved by the Invention] In the above-mentioned conventional centralized line setting check system, if the time division multiplexing device or external device of the control station of the time division multiplexing system is in failure, other time division multiplexing devices Even if line setting is possible, line setting check is not possible. Also, if a relay line in the system becomes disconnected or if the control station or external control device becomes uncontrollable, the line setting check cannot be performed. When checked by a human, it has the disadvantage that it takes a long time to find errors. SUMMARY OF THE INVENTION An object of the present invention is to eliminate such drawbacks and to provide a line setting check method for a time division multiplex system that can check line settings for each trunk line using only check information generated from line setting information. [Means for solving the problem] The present invention has a line setting function that allows input of line setting information necessary for time slot allocation and performs time slot allocation based on this line setting information.
Time division multiplexing consists of two or more time division multiplexing devices that can change the time slot allocation and can communicate with each other by constantly allocating control channel slots, and one relay line that connects these time division multiplexing devices. This is a line setting check method for a time division multiplexing system that checks the line setting of the system, in which each time division multiplexer converts a part of the line setting information into a check element for each trunk line, and checks this check element at a predetermined level. A check element table is generated for each trunk line by sorting, check information is generated by CRC calculation from this check element table, and the check information is transmitted to each other by mutual communication between time division multiplexers. It is characterized in that it is determined whether the line settings are correct by checking whether the check information of the own station matches the check information received from the opponent station. [Example] Next, an example of the present invention will be described with reference to the drawings. FIG. 1 is a diagram of line setting information and check elements showing one embodiment of the present invention. This line setting information is information related to the time division multiplex system, including channel transmission speed, local station SYS No., local station CH
This means the information necessary for time slot allocation, including at least the following: No., final SYS No., final CH No., and trunk line No. Further, the check element is composed of the transmission speed, the local station SYS No., the local station CH No., the final SYS No., the final CH No., and the relay line No. in the line setting information. This time-division multiplexing system consists of two or more time-division multiplexing devices that have a line setting function, can change time slot assignments, and can be remotely controlled by constantly assigning control channel slots, and these time-division multiplexing devices. It is a system consisting of one or more relay lines connecting The line setting function here refers to the information necessary for time slot allocation (that is, channel transmission speed, local station SYS No., local station CH No., final station SYS No., final station CH No., trunk line No. This function allows time slot allocation to be performed based on this input. In the present invention, only the time slot allocation information is limited, and other input methods and time slot allocation are the same as in the prior art. Furthermore, remote control refers to mutual communication between time division multiplexing devices. Note that multiplexing of channel signals of each system and connection to trunk lines are performed using conventional techniques, and are not a feature of the present invention. Among the line setting information related to such a system, line setting information 1 shown in FIG. 1 is information when the channel of the own station is the starting end. The "transmission rate" of this line setting information 1 represents the data transmission rate between the local station and the terminal station, which is the other party's station. “My station SYS No.” represents the system number of my own station, and “My station CH No.” represents the channel number of my system. “Final SYS No.” represents the system number of my own station. "Final CH No." represents the channel number of this final system. "Relay line No." represents the relay line number between the local station and the final station. . Such as “transmission speed”, “own station SYS No.”,
“Own station CH No.”, “Final SYS No.”, “Final CH
Line setting information 1 consisting of “No.” and “Relay line No.”
It is converted into check element 2 in order to sort the line setting data for each trunk line. The "relay line No." and "transmission speed" of this check element 2 correspond to the "relay line No." and "transmission speed" of the line setting information 1. The “younger SYS No.” represents the smallest system number among the system numbers represented by “own SYS No.” and “final SYS No.” in the line setting information 1.
The "CH No. of the younger SYS" represents the channel number of this younger number system. “Late SYS No.” represents the late system number among the system numbers mentioned above.
"SYS CH No." represents the channel number of this slow number system.
SYS No.”, “Young SYS CH No.”, “Late SYS CH No.”
Check element 2 consists of "CH No." and "CH No. of late SYS." As mentioned above, check element 2 is a conversion of line setting information 1. This line setting information 1 is This is the setting when the own station's channel is the starting end. By the way, there is also a setting for the bypass channel in the line setting. Line setting information 3 is the setting information in this case. "Speed" represents the speed of data transmission between the originating station and the ending station. "Originating SYS No." represents the originating system number, and "Originating CH No." It represents the channel number of the originating system. “Final SYS No.” represents the final system number, and “Final CH No.” represents the channel number of this final system. "Relay line No." and "Relay line No." represent the numbers of the relay line related to data transmission by bypass channel between the originating station and the ending station. Station SYS No.”,
“Starting CH No.”, “Final SYS No.”, “Final CH
The same conversion as that performed on line setting information 1 is performed on line setting information 3 consisting of ``No.'', ``relay line No.'', and ``relay line No.''. In other words, line setting information 3 is converted to check elements 4 and 5 to have the same configuration as check element 2. Through this conversion, all line setting information is converted to check elements for each line. Here, for these check elements for each line, Then, create a check element table by further sorting as follows.This sorting involves sorting the check elements for each line in descending order of (i) "transmission speed". (ii) Same “Younger SYS No.” in “transmission speed”
Sort from youngest to oldest. (iii) “CH No.” in the same “younger SYS No.”
Sort from youngest to oldest. Table 1 shows an example of the check element table obtained as a result of this sorting.

〔Effect of the invention〕

As described above, according to the present invention, line settings for each trunk line can be checked using only check information generated from line setting information. Therefore, in a time division multiplexing device that accommodates a plurality of trunk lines, even if some of the trunk lines are out of order, the check information cannot be exchanged and checked individually with the facing time division multiplexing device via the trunk line for each trunk line. Therefore, line setting checks for channels related to trunk lines with no line failure can be performed normally. Furthermore, since checking is performed in a distributed manner, only the changing station can determine whether or not switching can actually be performed when a local line setting change is desired.

[Brief explanation of drawings]

FIG. 1 is a diagram of line setting information and check elements showing one embodiment of the present invention. 1, 3... Line setting information, 2, 4... Check element.

Claims (1)

[Scope of Claims] 1. Has a line setting function that allows input of line setting information necessary for time slot allocation, performs time slot allocation based on this line setting information, allows time slot allocation to be changed, and controls channel slots. A time division multiplex system that checks the line settings of a time division multiplex system consisting of two or more time division multiplexing devices that can communicate with each other by constant allocation and one relay line connecting these time division multiplexing devices. This is a line setting check method in which each time division multiplexer converts a part of the line setting information into check elements for each trunk line, rearranges these check elements in a predetermined sorting manner, and performs a check for each trunk line. An element table is generated, check information is generated from this check element table by CRC calculation, and the check information is exchanged via the relay line by mutual communication between time division multiplexers, and the check information of the own station and the opponent station are exchanged. A line setting check method for a time division multiplex system, characterized in that it is determined whether line settings are correct by checking whether received check information matches.