JPH0336835A - Logical number provided type multi-access control system - Google Patents

Abstract

PURPOSE:To easily improve the general-purpose application and the performance of extension by assigning a logical number using a specific number of a terminal equipment as a key, adding a logical number to a data between a terminal equipment and a network and using the result for identifying each terminal equipment. CONSTITUTION:When a terminal equipment having no logic number starts the communication, a logical number management section 35 of a data link layer 32 of a terminal equipment reads its specific number from a specific number ROM 37, adds the number to a logical number request signal and the result is sent to a network. A logical number provision section 45 of a data link layer 42 of the network extracts a specific number from a received logical number request signal, selects a logical number not given yet from a logical number-specific number relevant table 47 and returns the result to the terminal equipment. Furthermore, the provision section 45 writes the relevant specific number and logical number into the table 47. The management section 35 of the terminal equipment receiving the logical number assignment signal writes the extracted logical number into a logical memory 38. Then the communication between the terminal equipment and the network is implemented by using a logical number added to the data as a key.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is characterized in that a plurality of terminals do not each have a unique communication line (for example, a subscriber line of a wired telephone network), and each terminal has a control line and a communication line. This invention relates to a logical numbering type multi-access control system used for identifying and specifying terminals in a communication system that shares the same information.

Furthermore, when a communication system is divided into multiple sub-communication systems (for example, in a mobile communication system, the service area is divided into multiple paging areas), the identification of terminals that move between each sub-communication system This paper also relates to a logical numbering type multi-access control method that is also effective for specific purposes.

[Prior Art] In I5DN and other wired communication networks, terminals are connected to a unique communication line (subscriber MA). Therefore, in the access control of such a communication system, each terminal can be easily identified because the terminals are compatible with subscriber lines.

On the other hand, each terminal in a mobile communication system to which a communication line is temporarily allocated during communication, for example, does not have its own communication line (subscriber line). Therefore, such a communication system (hereinafter, a mobile communication system will be explained),
The same applies to LAN and other communication systems. )
In this case, each terminal (mobile device) must be identified using something other than the subscriber line.

In other words, in a mobile communication system in which multiple terminals share a smaller number of communication lines, allocation of communication lines used for communication is performed via a separately provided control line, but unlike wired communication networks, unique Since it does not have a subscriber line, the conventional system uses a unique number assigned individually to identify each terminal (mobile device).

[The challenge that the invention attempts to solve]

By the way, although communication functions are not layered in conventional mobile communication systems, layering of communication functions (module ) is an effective method.

In addition, when layering communication functions, if a unique number is used as an identifier added to transmitted and received data to identify each terminal, the number of digits is long, so a decrease in transmission efficiency is unavoidable. A method that allows each terminal to be easily identified by means other than a number.Furthermore, when multiple sub-communication systems exist, it is necessary to consistently identify terminals that have moved between these sub-communication systems. .

Although the present invention meets each of these demands, the present invention aims at layering the communication functions in a communication system J, which does not have a communication line specific to the υI3'-1 terminal, and makes terminal identification easier. The purpose of the present invention is to provide a logical numbering type multi-access control system that can also handle terminals that move between multiple sub-communication systems.

[Means to solve the problem] FIG. 1 is a diagram showing the principle of the system of the present invention.

Note that FIG. 1(a) corresponds to claim (1), and FIG. 1(b) corresponds to claim (2).

The logical numbering type multi-access control method described in claim (1) includes a plurality of unspecified terminals, a network that performs switching processing, and a control line that is shared by the terminals and the network for communication control between them. , a terminal and at least one communication line used for communication between the terminal and the network, wherein the terminal and the network have a physical layer that converts data into electrical or radio wave format on the control line and the communication line, It has a communication function that is divided into a data link layer that sends and receives data between networks, and a network layer that performs routing and data transfer between terminals. have a number,
The unique number is notified to the data link layer of the network via the control line, and the data link layer of the network is equipped with a logical number allocation processing means that allocates a logical number using the notified unique number as a key. The data link layer adds a logical number to the data,
It is also configured to include terminal identification means for identifying terminals based on logical numbers.

The logical numbering type multi-access control method according to claim (2) is applicable to a plurality of sub-communications to which the logical numbering type multi-access control method according to claim (1) is applied. In a communication system that is divided into systems, terminals can move freely between sub-communication systems, logical numbers are managed independently for each sub-communication system, and each sub-communication system is used redundantly. The computer has an attribute that can uniquely identify a sub-communication system, and includes attribute notification means for notifying each terminal in the sub-communication system of the attribute, and the terminal receives the attribute and transfers between the sub-communication systems. an attribute change detection means for detecting a change in attributes due to a change in attributes; and a logical number change control for activating a logical number allocation processing means in response to the detection of a change in attributes and requesting reassignment of logical numbers in a destination sub-communication system. and means.

[Function] In the logical numbering type multi-access control system described in claim 1, the communication function is set to 031 (Open
By separating the physical layer (layer 1), data link layer (layer 2), and network layer (layer 3) into the physical layer (layer 1), data link layer (layer 2), and network layer (layer 3) in accordance with the architecture of , changes can be made closed within the hierarchy.

Furthermore, in a communication system that does not have a terminal-specific communication line (subscriber vA), the data link layer of the network uses the terminal's unique number as a key in response to a request from the terminal's data link layer made prior to communication. By assigning a logical number to the data between the terminal and the network and using it as an identifier for each terminal, it is possible to identify the terminal (for example, which subscriber's call belongs to).
can be easily done.

The logical numbering type multi-access control power according to claim (2), Part 2, is applicable when a communication system is divided into a plurality of sub-communication systems and a terminal moves between these sub-communication systems. The data link layer of the mobile terminal recognizes that the sub-communication system attributes have changed and autonomously changes the logical number to that of the destination sub-communication system, thereby maintaining the logical number even when moving between sub-communication systems. Conflicts (eg double allocation) can be avoided.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In this embodiment, a case will be described in which the method of the present invention is applied to a mobile communication system, but the method of the present invention can be similarly applied to LAN and other communication systems.

First, the logical numbering type multi-access control system set forth in claim (1) will be explained.

2) A diagram showing a schematic configuration of a mobile communication system to which the method of the present invention as set forth in claim (1) is applied; FIG. 3 is a diagram showing an example configuration of a terminal; FIG. 4 is a diagram showing an example configuration of the network.

In FIG. 2, a plurality of terminals 21. ．． 21g...
21. , are connected to the network 25 via a shared control line 23. A predetermined communication terminal vA27 is assigned to the terminal 21 that performs communication via the control line 23,
It is connected to the network 25 via the communication line 27.

That is, the terminal 21 . accesses the communication line 27, and other terminals 21+ to 21. , are waiting on the shared control line 23.

In FIG. 3, the terminal has a network layer (layer 3) 31 that performs routing and data transfer between the terminals.
, a data link layer (layer 2) 32) that mutually transmits and receives data between terminals and the network, and a physical layer (layer 1) 33 that converts data into electrical or radio wave format on control lines and communication lines.

The data link layer 32 includes a multiplexing/demultiplexing section 36 connected to a logical number management section 35, a unique number ROM 37, and a logical number memory 38. Note that the multiplexing/demultiplexing section 36 and the logical number memory 38 are connected to each other, and the data link layer 32
The connection between the network 31 and the physical N 33 is performed via the multiplex/demultiplex unit 36.

In FIG. 4, the network includes a similar network layer (layer 3) 41, data link layer (layer 2) 42
and a physical layer (layer 1) 43. The data link layer 42 has a multiplexing/demultiplexing section 46 connected to the logical number assigning section 45 and a logical number-unique number correspondence table 47. Note that the data link layer 42 and the network layer 41
Connection with the physical layer 43 is made via a multiplex/demultiplexer 46.

Hereinafter, with reference to FIGS. 2 to 4, regarding the logical number allocation sequence corresponding to claim (1) shown in FIG. The procedure for starting communication will be explained as an example.

Terminal 21 without logical number. When the terminal 21. starts communication, this terminal 21. The logical number management unit 35 in the data link layer 32 reads the unique number from the unique number ROM 37, puts it in a logical number request signal 51, and transmits it to the network 25.

The logical number assigning unit 45 in the data link layer 42 of the network 25 extracts the unique number from the received logical number request signal 51, and extracts the unique number from the logical number-unique number correspondence table 47.
Select an unassigned logical number from
Reply to +.

Further, the logical number assigning unit 45 writes the corresponding unique number and logical number into the logical number-unique number correspondence table 47.

The logical number management unit 35 of the terminal 21 which received the logical number allocation signal 53 stores the extracted logical number in the logical number memory 3.
Write in 8.

Thereafter, the terminal 21. Communication between the data and the network 25 is performed using a logical number added to the data as a key.

Next, the logical numbering type multi-access control system set forth in claim (2) will be explained.

FIG. 6 is a diagram showing a schematic configuration of a mobile communication system to which the system of the present invention recited in claim (2) is applied.

In the figure, sub-communication systems 611 and 61□ are respectively equivalent to the mobile communication system shown in FIG. 2, and each part is indicated by the same number. Note that the sub communication system 61. The terminal is 21. ~21. The terminals of the sub communication system 61z are 211°1 to 21. .

and each sub-communication system 61. ．． 612 control lines,
Communication lines and networks are each distinguished by a subscript. In addition, each sub-communication system 61. ．． 61□ for each terminal communicating with 21. ．． It shall be 21J.

Furthermore, each sub-communication system 61. ．． 612 networks 25. ．． Connected to 25□ is a terminal location registration memory 63 that stores sub-communication systems in which all terminals in the mobile communication system are located.

Hereinafter, with reference to FIGS. 3, 4, and 6, the logical number allocation (change) sequence associated with terminal movement shown in FIG. 7 will be explained about the sub communication system 61. A case will be described in which the terminal 21k to which the logical number is assigned moves to the sub-communication system 61□. Note that the terminal 21° to which a logical number has been assigned refers to a terminal that has completed communication and is holding the assigned logical number and is waiting on the control line 231, but it does not refer to a terminal that is currently communicating. The same applies.

Each network 25. 25□ logical numbering section 45
1.45□ is the sub communication system 61.1 that broadcasts each sub communication system attribute of the sub communication system 6161□.
When the terminal 21+, which has moved from the sub-communication system 61 The allocation sequence is executed to request reassignment of a logical number in the sub communication system 61z (logical number request signal 51).

The logical number assigning unit 45□ of the network 25□ and the terminal 21. The logical number management unit 35 of the sub communication system 6
The logical number allocation process in step 12 is similarly performed (logical number allocation signal 53).

Note that the logical number assigning unit 45 of the network 25□ sends out the logical number assignment signal 53 and also sends the sub communication system 25. of the terminal 21□ to the terminal location registration memory 63.
Request deletion of the logical number including the unique number. Upon receiving this logical number deletion request signal 55, the terminal location registration memory 63 rewrites the location sub-communication system corresponding to the terminal 21k (611→612), and further rewrites the location sub-communication system 61. The logical number assigning unit 45 of the network 25. , an instruction is given to delete the logical number including the unique number of the terminal 21k. Logical number assigning unit 45 .receives this logical number deletion instruction signal 57 . Now, the five columns of the logical number-unique number correspondence table 47 are deleted and the logical number is released.

In this way, in the data link layer 32.42 of the terminal and network, a predetermined logical number corresponding to the unique number of the terminal is assigned, and the terminal in communication is identified and specified. Furthermore, when a terminal moves between multiple sub-communication systems, the logical numbers are reallocated in the new sub-communication system, and the logical numbers allocated in the old sub-communication system are released. Identification and specification of terminals moving between each sub-communication system is performed.

(Effects of the Invention) As described above, the present invention enables the independent development or modification of functions corresponding to each layer by layering communication functions, and easily increases the flexibility, versatility, and expandability of the network. Become.

Furthermore, by using a logical number managed on the network side as a terminal identifier, the identifier can be made shorter than when a unique number is used, and control lines can be used more effectively.

When a terminal moves between multiple subcommunication systems,
By assigning a logical number to each sub-communication system, it is possible to easily deal with movement.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention. 2) A diagram showing a schematic configuration of a mobile communication system corresponding to claim (1). FIG. 3 is a diagram showing the configuration of an embodiment of the terminal. FIG. 4 is a diagram showing an example configuration of a network. FIG. 5 is a diagram showing a logical number allocation sequence. FIG. 6 is a diagram showing a schematic configuration of a mobile communication system corresponding to claim (2). FIG. 7 is a diagram showing a logical number allocation (change) sequence accompanying terminal movement. 21...Terminal, 23...Control line, 25...Network, 27...Communication line, 31.41...Network N (layer 3), 32.42...Data link layer (layer 2), 33.43...Physical layer (layer 1
), 35... Logical number management unit, 36... Multiplex/separate unit, 37... Unique number ROM, 38... Logical number memory, 45... Logical number assigning unit, 46... Multiplexing / Separation unit, 47... Logical number-unique number correspondence table, 5
DESCRIPTION OF SYMBOLS 1... Logical number request signal, 53... Logical number assignment signal, 55... Logical number deletion request signal, 57... Logical number deletion instruction signal, 61... Sub communication system, 63
...Terminal location registration memory. Sub communication system] (b) Figure Figure Figure Figure Figure

Claims (2)

[Claims] (1) A plurality of unspecified terminals, a network that performs exchange processing, a control line that the terminals and the network share to control communication between them, and at least one communication line that the terminals and the network use for communication between them. In a communication system equipped with a line, the terminal and the network have a physical layer that converts data into electrical or radio wave format on the control line and the communication line, and a communication system that transmits and receives data between the terminal and the network. The data link layer of the terminal has a unique number that is different for each terminal, and the data link layer of the terminal has a unique number that is different for each terminal, The data link layer of the network is provided with a logical number allocation processing means for allocating a logical number using the notified unique number as a key; A logical number assignment type multi-access control system, characterized in that the data link layer of the network includes terminal identification means for adding the logical number to data and identifying the terminal based on the logical number. (2) The logical numbering type multi-access control system set forth in claim (1) is divided into a plurality of sub-communication systems to which terminals can freely move between the sub-communication systems, and the logical In a communication system where numbers are managed independently for each sub-communication system and are used redundantly for each sub-communication system, the network of the sub-communication system has an attribute that can uniquely identify the sub-communication system. and an attribute notification means for notifying each terminal in the sub-communication system of the attribute, the terminal receiving the attribute and detecting a change in the attribute due to movement between the sub-communication systems. The present invention is characterized by comprising: a detection means; and a logical number change control means for activating a logical number allocation processing means in response to detection of a change in the attribute and requesting reassignment of a logical number in a destination sub-communication system. Logical numbering type multi-access control method.