JPH0614088A - Communication control processor - Google Patents

Abstract

(57) [Abstract] [Purpose] A communication control processing device that is connected to a plurality of types of communication networks and controls communication by a layered protocol, and facilitates addition of a higher-order processing unit and a lower-order processing unit, and
Network address, upper processing unit and lower processing unit,
The purpose is to realize a flexible combination of routes. [Structure] Upper processing unit for performing upper layer protocol processing, lower processing unit for performing lower layer protocol processing, address information,
A module selection unit that separately provides path information, a resource management unit that manages the configuration of each processing unit, and a corresponding upper coupling terminal and lower coupling terminal for the upper processing unit and the lower processing unit, respectively, is provided. Is characterized in that the upper processing unit and the lower processing unit are dynamically associated with each other by using each information managed by the resource management unit when the connection is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication control processing device which is connected to a plurality of types of communication networks and controls communication by a layered protocol.

[0002]

2. Description of the Related Art In OSI (Open System Interconnection), the functions for realizing communication between end nodes are defined by dividing them into seven layers, but they have a communication function for efficiently transferring data transparently. It is roughly divided into a lower layer to handle and an upper layer to handle communication functions depending on the application. Since each of the upper layer and the lower layer has a plurality of functions and protocols, it is general that each protocol processing unit is divided into a plurality of parts and mounted.

In the communication control processing device, a network address (NSAP), a sub-address, and a sub address are selected when selecting a lower processing unit that performs lower layer protocol processing when making a call and when selecting an upper processing unit that performs upper layer protocol processing when receiving a call. It uses the network address (sub-NSAP) and route information. The correspondence relationship between these combinations and each processing unit is defined in advance as a decision table or selection logic, and is used by each processing unit when making or receiving a call.

The network address is an address for identifying a communication subject (node) in the network, and is called a network service access point address (NSAP address) in OSI, and communication is performed using a plurality of communication networks. When it does, it is expressed in a form that does not depend on the network. The subnetwork address is an address for identifying a subscriber of the public network or the private network, and corresponds to the DTE address in the case of the public network. Further, the route information depends on the mounting state, and generally, information corresponding to the type of the transit network and the quality of service (QOS) parameter defined by OSI is used.

FIG. 6 shows an example of the physical configuration of the network. In the network shown here, a node 1 and a node 2 are connected via a communication network A and a communication network B,
Further, the node 1 and the node 3 are connected via the communication network B.

FIG. 7 shows the relationship between the OSI network address (NSAP) and the route for such a network.
Shown in. NSAP10 and NSAP11 for node 1
Is defined in the nodes 2 and 3 respectively.
SAP20 and NSAP30 are defined. NSAP
Two routes are prepared for communication between 10 (node 1) and NSAP 20 (node 2).
One path is prepared for communication between the NSAP 30 and the NSAP 30 (node 3). In addition, NSAP11 (node 1) and NSAP
One path is prepared for each communication of the SAP 20 (node 2) and the NSAP 30 (node 3). Here, the route is, for example, NSAP10 and NSAP.
Between 20 and sub-NSAP1A and sub-NSAP
It is a sub-NSAP pair such as 2A. The sub NSAP is given to the line by the DTE number of the communication networks A and B.

[0007]

By the way, it is desirable that the upper processing unit and the lower processing unit are flexibly combined and mounted according to the type of communication network to be accommodated and the communication purpose, but conventionally, NSAP and each processing unit are mounted. Was directly associated with.

One of the reasons for this is that the provision of a plurality of upper processing units and lower processing units complicates the function of controlling the connection relationship such as a decision table in proportion to the number of combinations of both. . On the other hand, even if this complexity is overcome and the flexibility of combination is realized, since this function has been built in each processing unit in the past, the flexibility for adding the upper processing unit and the lower processing unit becomes poor. Was there.

Another factor is that the upper processing unit cannot grasp the status of the transit network or the partner sub-NSAP.
And the combination of protocols or routes was limited. That is, the correspondence between the partner NSAP, the lower protocol, and the transit network is generally 1: n: m, but since the upper processor does not know the path state (normal or fault), the lower protocol should be selected effectively. I can't. Therefore, the partner NSAP and the lower protocol or the partner NSAP and the transit network must be limited to 1: 1.

The present invention provides a communication control processing device capable of easily adding a high-order processing unit and a low-order processing unit and realizing a flexible combination of a network address, a high-order processing unit and a low-order processing unit, and a route. The purpose is to do.

[0011]

According to a first aspect of the present invention, there is provided an upper processing unit for performing upper layer protocol processing, a lower processing unit for performing lower layer protocol processing, address information, route information, and a configuration of each processing unit. A module selection unit that provides corresponding upper connection terminals and lower connection terminals for the resource management unit, the upper processing unit, and the lower processing unit to be managed is separately provided, and the module selection unit is managed by the resource management unit when the connection is generated. It is characterized in that the upper processing unit and the lower processing unit are dynamically associated with each other by using the respective information.

The invention according to a second aspect is characterized in that, in the communication control processing device according to the first aspect, the host processing section and the module selection section are integrated. According to a third aspect of the present invention, in the communication control processing device according to the first aspect, a lower processing unit and a module selection unit are integrated.

[0013]

According to the invention described in claim 1, at the time of transmission, the resource management unit determines a communicable route, a lower layer protocol used on the route, and a corresponding lower processing unit based on the address information (network address). select. The module selection unit dynamically associates the upper coupling terminal and the lower coupling terminal with the information selected by the resource management unit and notifies the lower processing unit of the route information, so that the upper processing unit and the lower processing unit Can be dynamically associated with.

When receiving a call, the resource management unit selects a corresponding upper processing unit based on the incoming route, lower layer protocol, and address information (network address). The module selection unit can dynamically associate the upper processing unit and the lower processing unit by dynamically associating the upper coupling terminal and the lower coupling terminal using the information selected by the resource management unit. it can.

According to the second aspect of the invention, the upper processing unit and the module selection unit are integrated to omit the dynamic association with the upper processing unit, but the lower processing unit is dynamically associated. As a result, similarly, it is possible to dynamically associate the upper processing unit and the lower processing unit.

According to the third aspect of the present invention, the lower processing unit and the module selection unit are integrated to omit the dynamic association with the lower processing unit, but the upper processing unit is dynamically associated. As a result, similarly, it is possible to dynamically associate the upper processing unit and the lower processing unit.

[0017]

1 is a block diagram showing the configuration of an embodiment of a communication control processing device according to the present invention. In the following, in the present embodiment, a case where the node 1 (NSAP 10) in FIGS. 6 and 7 is mounted will be described.

In the figure, the communication control processor is a sub-N
It is connected to the communication network A via the control terminal 1A corresponding to the SAP 1A, and is connected to the communication network B via the control terminal 1B corresponding to the sub NSAP 1B. The upper processing units 101 and 102 for performing the upper layer protocol processing and the lower processing units 103 and 104 for performing the lower layer protocol processing are connected to the upper coupling terminals 1001 and 1002 provided by the module selection unit 100.
And the lower coupling terminals 1003 and 1004 are coupled to each other. The resource management unit 105 includes a module selection unit 100, upper processing units 101 and 102, and lower processing unit 10.
It is arranged independently of 3, 104. The lower processing unit 10
3, 104 are both connected to the respective control terminals 1A, 1B.

Before describing the operation of this embodiment, the following five items will be assumed for convenience of explanation. NSAP can be transferred by a lower layer protocol.

The upper processing unit 101 processes the upper layer protocol P1, and the upper processing unit 102 processes the upper layer protocol P1.
Process 2. The lower processing unit 103 processes the lower layer protocol P3, and the lower processing unit 104 processes the lower layer protocol P4. Note that P3 can be used only in the communication network B, and P4 can be used in the communication network A and the communication network B.

At the time of transmission, the resource management unit 105 determines that the destination N
The network type used for communication to the SAP is selected and the module selection unit 100 is notified. The lower-level processing units 103 and 104 cooperate with the resource management unit 105 to obtain the final route and control information necessary for communication.

The upper processing units 101 and 102 have the same access interface. Similarly, the lower processing unit 10
3, 104 have the same access interface. Here, an example of the route information managed by the resource management unit 105 is shown in FIG.

Referring to the operation sequence example centering on the module selection unit 100 shown in FIGS. 3 and 4 and the operation sequence example of the module selection unit 100 and the resource management unit 105 shown in FIG. 5, the module selection unit 100 will be described below. The operation of this embodiment will be described with a focus on the function of the resource management unit 105.

First, with reference to FIGS. 3 and 5, an operation example at the time of calling will be described. Here, one upper processing unit 101 is used, and the lower processing unit 10 is used depending on the communication partner.
An example of selecting 3, 104 will be shown. As can be seen from the route information of FIGS. 6 and 2, the route to the NSAP 20 is the communication network A.
And communication network B, and the lower layer protocol that can be used differs for each route.

(1) The module selection unit 100 provides a service for registering attributes of the upper processing unit 101 and lower processing units 103 and 104, and a service for deleting registration information. Further, the attribute of each processing unit necessary for selecting each processing unit is acquired at the time of attribute registration, and is associated with the upper coupling terminal 1001 and the lower coupling terminals 1003 and 1004. The upper processing unit 101 and the lower processing unit 10 in this example
The attributes of 3, 104 are protocols P1, P3, P4 that can be processed by each processing unit.

(2) When the module selection unit 100 receives a connection generation request from the upper processing unit 101 to the NSAP 20, the resource management unit 105 asks the module selection unit 100 to (a) route / protocol selection, (b) Provides a service for selecting its own NSAP.

That is, (a) in the route / protocol selection, the destination (NSAP 20) and the attribute (P1) of the upper processing unit 101 are used as input parameters, and the communicable network type (communication network B) and the lower processing unit to be used. The attribute (P3) is output. (b) In the own NSAP selection, the destination (NSAP2
0), the attributes of the upper processing unit and the lower processing unit (P1, P
NSAP of the local system using 3) as an input parameter
Select (NSAP10).

(3) The module selection unit 100 determines, based on the route information obtained from the service (a) of the resource management unit 105 and the attribute of the lower processing unit, the connection terminals 1001 corresponding to the upper processing unit and the lower processing unit, respectively. It is associated with the coupling terminal 1003,
The lower processing unit 1 sends a connection generation request to the NSAP 20.
Tell 03. At this time, the service of the resource management unit 105
The information obtained from (a) and (b) is transmitted to lower layers.

In this way, the upper processing unit 101 (NS
In response to the connection generation request from the AP 10), the module selection unit 100 can dynamically select the lower processing unit, and the two are connected until the upper processing unit 101 issues a connection release request.

(4) When the connection is released by the connection release request from the upper processing unit 101, the association of the coupling terminals corresponding to each of the upper processing unit and the lower processing unit is released.

Next, with reference to FIGS. 4 and 5, an operation example at the time of an incoming call will be described. Here, an example in which one lower processing unit 104 is used and an upper processing unit is selected by the own NSAP is shown.

(1) The module selection unit 100 provides a service for registering the attributes of the upper processing units 101 and 102 and the lower processing unit 104, and a service for deleting the registration information. In addition, the attribute of each processing unit necessary for selecting each processing unit is acquired at the time of attribute registration, and the upper coupling terminals 1001 and 1002 are acquired.
And the lower coupling terminal 1004. Note that the attributes of the upper processing units 101 and 102 and the lower processing unit 104 in this example are the protocol P that can be processed by each processing unit.
1, P2 and P4.

(2) When the module selection unit 100 receives a connection generation instruction from the lower processing unit 104, the resource management unit 105 provides the module selection unit 100 with (c) incoming call check service.

That is, (c) In the incoming call check, the address information (incoming NSAP11, outgoing NS
Whether or not the incoming call is possible is checked from the AP 30), and if the incoming call is possible, the incoming call destination is determined from the address information and the attribute (P4) of the lower processing unit, and the attribute (P1) of the upper processing unit is output.

(3) The module selection unit 100 checks whether or not the incoming call is possible from the information obtained from the service (c) of the resource management unit 105. If the incoming call is possible, the address information acquired at the time of the incoming call and the upper processing unit Based on the connection state or the like, the connection terminals 1001 and 1004 corresponding to the upper processing unit and the lower processing unit are associated with each other, and a connection generation instruction with the NSAP 30 is transmitted to the upper processing unit 101.

In this way, the lower processing section 104 (NS
In response to the connection generation instruction from the AP 30), the module selection unit 100 can dynamically select the upper processing unit, and the two are connected until the lower processing unit 104 issues a connection release instruction.

(4) When the connection is released by the connection release response from the upper processing unit 101 in response to the connection release instruction from the lower processing unit 104, the association of the coupling terminal according to each of the upper processing unit and the lower processing unit Is released.

The functions of the module selection unit 100 and the resource management unit 105 have been described above separately for calling and receiving. However, the functions shown in (1) to (4) at the time of calling and receiving are respectively described. Corresponding.

Regarding the function (1), if the combined state of the upper processing unit and the lower processing unit and the module selection unit does not change during the operation period of the communication control processing device, the module selection unit is installed in the higher order. It can be omitted by storing each attribute of the processing unit and the lower processing unit.

As a part of the service (a) of the function (2), the sub NSAP corresponding to the route to the destination NSAP may be obtained. Also, the function (2) service (a)
You may make it utilize a QOS parameter etc. as an input to.

When the own NSAP is used as an attribute of the upper processing unit and the lower processing unit, the service (b) of the function (2) may be omitted. Further, when it is not necessary to divide either the upper processing unit or the lower processing unit into a plurality, it is possible to integrate the module selection unit and the upper processing unit or the lower processing unit (claims 2 and 3). Corresponding to 3).

In the function (3), since the upper processing unit and the lower processing unit are associated with each connection, the module selection unit may define the connection end point identifier independently.

Further, in the functions (3) and (4), when the access interfaces of the upper processing unit and the lower processing unit are different, it is necessary to convert the access interface in the module selection unit.

As the route information, sub NSAP or the like may be used in addition to NSAP.

[0045]

As described above, the communication control processing device of the present invention is capable of performing communication in any combination of an upper processing unit that processes an upper layer protocol and a lower processing unit that processes a lower layer protocol. Become. Therefore, it is possible to flexibly deal with the addition of a new communication network or protocol, and it is possible to easily expand the function.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a communication control processing device of the present invention.

FIG. 2 is a diagram showing an example of route information managed by a resource management unit 105.

FIG. 3 is a diagram showing an example of an operation sequence (during a call) centering on a module selection unit 100.

FIG. 4 is a diagram showing an operation sequence example (at the time of incoming call) centered on the module selection unit 100.

FIG. 5 is a diagram showing an operation sequence example of a module selection unit 100 and a resource management unit 105.

FIG. 6 is a diagram showing an example of a physical configuration of a network.

FIG. 7 is a diagram showing a relationship between NSAP and a route.

[Explanation of symbols]

 100 module selection unit 101, 102 upper processing unit 103, 104 lower processing unit 105 resource management unit 1001, 1002, 1003, 1004 coupling terminal 1A, 1B control terminal

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical indication location 8020-5K H04L 13/00 303 B (71) Applicant 000005223 Fujitsu Limited Nakagami-ku, Kawasaki-shi, Kanagawa Prefecture 1015 Odanaka (72) Hiroshi Yamaguchi 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Shonai Takeuchi 223-1 Yamashita-cho, Naka-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Chifuyu Tamiya Chiba 5-7 Shiba, Minato-ku, Tokyo Inside NEC Corporation (72) Inventor Akira Hasegawa 5030 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Incorporated company Hitachi Ltd. Software Development Division (72) Inventor Hideaki Orikasa 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited

Claims (3)

[Claims] 1. An upper processing unit that performs upper layer protocol processing, a lower processing unit that performs lower layer protocol processing, a resource management unit that manages address information, route information, and the configuration of each processing unit, an upper processing unit, and A module selecting unit that provides a corresponding upper coupling terminal and a lower coupling terminal corresponding to the lower processing unit is separately provided, and the module selecting unit uses each information managed by the resource management unit when a connection is generated. The communication control processing device is characterized in that the upper processing unit and the lower processing unit are dynamically associated with each other. 2. The communication control processing device according to claim 1, wherein the upper processing unit and the module selection unit are integrated. 3. The communication control processing apparatus according to claim 1, wherein the lower processing section and the module selecting section are integrated.