JP2000244582A - Communication control method and communication control device - Google Patents

Abstract

(57) [Problem] To simplify a control procedure of an IP network, an ATM exchange, and the like at the time of a call when a user has a plurality of IP addresses. When an IPH receives an IP packet from an IP network, it is assumed that corresponding user information has not been registered in a registration table. In this case, IPH20
Notifies the PROC 40 of IP information (IP header), obtains user information from the HLR / VLR 50,
Further, other user information about the corresponding user is also obtained and set in the registration table of the IPH 20. Thereafter, when receiving the IP packet related to the user A, the IP packet is transferred according to the user information registered in the registration table 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a communication control method and a communication control device. The present invention particularly relates to a multimedia switching system (hardware / operating system configuration) suitable for handling a plurality of types of signals (voice / image / data) communicated at various speeds via various media. ) Relates to a communication control method and a communication control device.

[0002]

2. Description of the Related Art In today's digital communication network, a packet communication network shown in Document A (see the note for the name of the document; the same applies hereinafter), in which a signal is placed on a variable-length packet for communication, a synchronization shown in Document B A time-division communication network (hereinafter, referred to as an STM (Synchronous Transfer Mode) communication network) for transmitting a signal by carrying a signal in a time slot that is time-divisionally divided into a frame, and a fixed-length packet called a cell shown in Document C Transfer network (hereinafter referred to as an ATM (Asynchronous Transfer Mode) communication network) that carries signals by carrying signals thereon, and furthermore, an IP (Intern
et Protocol) A packet is placed on a variable-length packet called a packet and communicates the IP packet according to a procedure called an Internet Protocol (IP). Signal is being communicated.

[0003] In addition, a medium for transmitting a signal is not limited to a conventional wired medium such as a metallic wire or an optical fiber.
As in the mobile communication network shown in Document E, the use of wireless as a medium for signal transmission is rapidly increasing. In this mobile communication network, similarly to the STM communication network shown in Document F, a PDC (Pe
rsonal Digital Cellular) / PHS (Personal Handyp)
Hone System) and CDMA that performs communication by modulating using a different code for each signal as shown in Document G
(Code Division Multiple Access) communication networks are developing.

[0004] The prior art relating to the present invention will be described below. FIG. 15 shows a configuration diagram of a conventional communication system. This communication system includes an IP network 1, an IP handler (IPH) 2, an ATM switch (ATM SW) 3, a processor (PROC) 4, and a storage unit (HLR / VLR (Home)).
Location Register / Visitor Location Register))
5, a base station (BS) 6 and a mobile station (MS) 7.

FIG. 16 shows the configuration of a conventional registration table. The registration table shown in this figure represents a user 160, an ATM header 161, and an IP header 162 in this figure. As can be seen from the figure, the conventional registration table has a one-to-one table for each user, and has a table structure that can be searched with each key. For example, for the user A, the ATM header “0”, the IP
The header “192.73.9.9” is stored.

FIG. 17 is a sequence diagram showing a conventional communication control operation. When an IP packet is transmitted from the IP network 1, the IPH 2 receives this. The IPH 2 extracts an IP header IP (A: a) for the user A and the user information a in the received IP packet, and extracts the IP (A: A:
In a), the internal registration table is searched by IP. Where I
If P (A: a) is not registered in the registration table, PROC
4 is notified of the IP (A: a). PROC4 is HLR
/ VLR5, and reads out user information a related to IP (A: a). Next, in PROC4, HLR /
The user information a read by the VLR 5 is registered in the registration table in the IPH 2, and the table is updated. Also,
The PROC 4 controls the ATM SW 3 in parallel with the registration to secure a communication path with the user A on the ATM network side.
Further, the IP / ATM converter in the IPH 2 converts the IP header into an ATM header ATM (A: a) of the user A and the user information a based on the user information a. AT
MSW3 is based on ATM (A: a), for example, MS
7 connects the user A to the IP network 1 and transfers IP packets.

If an IP packet of the same user A and user information a is received again while the user information a for the user A is registered in the registration table in the IPH, the IP (A) is referred to by referring to the registration table. : A) ATM
(A: a) and transfer the IP packet.

Here, when IPH2 receives IP (A: b) of user A and user information b, the user information b is transmitted to HLR / VLR similarly to the case of receiving IP (A: a).
5 and the operation of registering it in IPH2 is executed.
Thereafter, IPH2 converts IP (A: b) into ATM (A:
b), and transmits the ATM (A: b) to the ATMSW3, and the ATMSW3 transfers the IP packet based on this.

As described above, in the conventional header processing in IPH2, the correspondence between the IP network 1, the ATM SW3 and the MS 7 is one-to-one. Therefore, conventionally, when information is transmitted from the IP network 1, information necessary for conversion between the IP header and the ATM header is transmitted by the IPH 2 every time the information is transmitted.
The operation of searching the HLR / VLR 5 under the control of C4 and updating the data is repeated.

The prior art has the following features. -In header processing, correspondence between IP side, ATM side and MS side is
There is a one-to-one correspondence. In an IP header process in an IP router or the like, when a certain IP header flows, the routing information is stored, and the routing process when the same IP header comes next is omitted. (At this time, it does not matter what the user does.)-The routing information is deleted by time monitoring or the like. -For outgoing and incoming calls, a communication path is secured between the user and the network using an out channel.

[0011]

The actual communication networks and communication systems as described above have been developed and introduced independently of each other, and have a signal format (speed / format).
And communication procedures (signaling system, protocol, etc.). Further, since the characteristics of the communication network are different, the communication service to be provided and the control mechanism for providing the service (for example, the configuration of the operation system, the configuration of the hardware / software interface, and the function and configuration of the communication application software). Even differences exist.

On the other hand, the communication network users who transmit and receive information using the communication network and the providers who provide the communication network have no difference (or are absorbed) in the above-described communication networks, and have a structure of the communication network. The ability to communicate with the other party using the communication service that can optimally communicate information with the desired device (or terminal) when you want to use it without being aware of the procedures and procedures, improves the usability of communication equipment and reduces communication costs. It is strongly hoped that it will contribute to the development of society as a result of reduction.

For this reason, an integrated communication network capable of integrating and handling the above-mentioned plurality of types of communication signals (voice / image / data) and a communication network (STM / ATM or wired / wireless) has been studied. However, some media is only integrated and processed, and it is not yet completed.
Indeed, interworking between networks that integrates various communication networks as described above, or that allows communication by interconnecting with simple control by absorbing the differences between the communication networks It is required to provide a communication network / communication device (mainly a switching system) capable of performing the above and a control method thereof.

An object of the present invention is to realize integration or interconnection of existing communication networks as described above. Another object of the present invention is to provide a switching system suitable for configuring a communication network for realizing integration or interconnection of existing communication networks and a control method therefor with a simple configuration and procedure.

According to the present invention, for example, in a state where the existing communication network is kept as it is, the existing communication networks are connected to each other so as to make full use of the communication capability and the provided service originally provided by the communication network. Performs necessary signal conversion, exchange, and control processing to provide connection and communication service provision, and provides information from the terminals of each existing communication network to the desired destination and to the desired destination when desired. System and a control method for the same are provided by a simple configuration and a simple procedure.

According to the present invention, for example, when a user or a terminal has a plurality of IP addresses, the I / O
An object of the present invention is to simplify control procedures for a P network, an ATM switch, and the like. For example, there is a case where a certain user has a plurality of IP addresses and performs a process such as checking mails.
It is assumed that access is performed by changing the address. An object of the present invention is to simplify a control procedure in such a case in consideration of IP traffic characteristics. It is another object of the present invention to speed up a registration table search at the time of receiving an IP packet by managing the registration of an IP header, an ATM header, and the like at each level such as main registration, provisional registration, and unregistered. I do.

[0017]

In order to solve the above-mentioned problems, a switching system according to the present invention asynchronously transmits fixed-length packets (cells) as switches for connecting between networks and exchanging signals. An ATM switch for switching is provided. The ATM switch is connected to each communication network to convert / invert a signal from the communication network into a cell, and also converts a control signal and a control procedure from each communication network to an inside of the switching system. Various communication network interfaces (application interface) for converting / inverting signals and procedures are provided. The control unit that controls the switching system is configured to connect a plurality of processors, whose functions are distributed according to the control contents, to the ATM switch. It is configured to perform exchange control and the like. Further, a plurality of processors are interconnected via a switch dedicated to a control signal different from the ATM switch, thereby performing high-speed signal control processing in which functions are dispersed, and exchanging signals for communication between networks. The configuration is such that the load on the ATM switch is not increased.

Further, the control unit provides a communication service of the existing network so that the communication service provided by the various communication networks can be continuously processed or converted into a communication service suitable for another communication network. When the application software to be introduced is introduced, it is provided with the application conversion software for absorbing the difference between the software configuration and functions and the interface conversion means of the operation system of the exchange system body. With this configuration, even if the application software is added or changed, it is absorbed and operated to convert and provide various communication services.

Specifically, in the present invention, for example,
It has the following features. In the header processing, the correspondence between the IP side, ATM side, and MS side is as follows:
n-to-one-to-n correspondence. -IP of a user or terminal having multiple IP addresses
Speed up routing with the network. A user and a terminal are specified from the first IP information, and a plurality of pieces of IP information relating to the user and the terminal are registered in the IPH (routing process).
The routing process of P is omitted. -A plurality of IPs of one user or one terminal are obtained as a database from the upper level, and a plurality of IPs are managed, including time, at several types of levels, such as main registration, temporary registration, and unregistered.・ For outgoing calls from the MS, a communication channel is secured in the out channel. -When an incoming call is received from the IP network, the user data is used as a starting point, and a communication path is secured in the out channel. -For a user who has already established a communication path, sending and receiving a new IP address uses the communication path as it is. However, the wireless section is
Increase or decrease channels as needed.

According to a first solution of the present invention, a step of receiving first IP information on a first user and first user information, and a step of receiving first user information on the received first IP information Searching for whether or not is in the registration table; if the search result indicates that the first user information is in the registration table,
Executing the conversion between the information and the ATM information, and, if the first user information is not found in the registration table as a result of the search, by notifying the upper device of the IP information, the first user information is transmitted from the upper storage device. When there is other user information related to the first user, the other user information is read out, the user information is registered in the registration table, and the IP information and the ATM information are registered according to the registered first user information. Performing the conversion of the communication control method.

[0021] The present invention also includes a step of receiving the second IP information for the first user and the second user information, and a step of registering the received second IP information in the registration table. And performing a conversion between the IP information and the ATM information in accordance with the second user information.

According to a second aspect of the present invention, a step of receiving first ATM information or signaling information on a first user and first user information, and notifying the higher-level device of the ATM information or signaling information By doing so, the first user information is read from the higher-order storage device and, when there is other user information relating to the first user, the other user information is read, and these user information are registered in the registration table, and the registered user information is registered. Executing a conversion between IP information and ATM information in accordance with the first user information.

Further, according to the third solution means of the present invention, a registration table for storing user information including a user, IP information, ATM information and a registration state, and an IP information table according to the user information stored in the registration table. And an IP / ATM conversion unit for converting between ATM and ATM information.
The / ATM conversion unit receives the first IP information for the first user and the first user information, and receives the first I
A search is made as to whether the first user information relating to the P information is present in the registration table, and as a result of the search, if the first user information is present in the registration table, the IP information and the ATM information are determined according to the user information. If the first user information is not found in the registration table as a result of the search,
By notifying the higher-level device of the IP information, the first user information and the other user information when there is other user information relating to the first user are read from the higher-level storage device, and these user information are stored in the registration table. Provided is a communication control device that registers information and executes conversion between IP information and ATM information in accordance with the registered first user information.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of a switching system, a communication apparatus, a communication network using the switching system, switching control, communication control, and communication network control according to the present invention; I do. In the conventional integrated switching system, there are restrictions on the communication networks to be interconnected and the types of signals that can be handled. On the other hand, the switching system of the present invention includes an interface conversion unit between the software application controlling the system and the operation system, and absorbs the difference between the control units of the different types of communication networks to provide a plurality of types. Interconnection of different communication networks. The switching system, the communication network using the same, and the control method according to the present invention provide a connection between a communication network using ATM cells and a communication network using IP packets, and an interconnection between a wired communication network and a wireless communication network. like,
The present invention can be applied to interconnection with any type of communication network.

FIG. 1 is a network configuration diagram showing the configuration of the entire communication network to which the switching system according to the present invention is applied. The entire communication network includes various communication systems such as an ATM communication network 101, an STM communication network 102, an IP communication network 103, and a mobile communication network 104 in a communication network 100 including switching systems 1-1, 1-2, and 1-3. A network and a network are connected.
In addition, terminals 106-1, 106-2, 1
06-3 are connected. The mobile communication network 104 has a base station BS and a mobile station CS. Alternatively, a wireless station or wireless local network 105 may be connected to an appropriate network. The ATM communication network 101 transmits and receives information using ATM cells, and is based on ITU (International Telecommunication).
communication Union, International Telecommunication Union)
Recommendation T. Q. 2931 etc. STM communication network 10
Numeral 2 is for transmitting and receiving information in time-division multiplexed time slots.
It is an NS64 communication network. The IP communication network 103 transmits and receives information in IP packets, and is, for example, the Internet. Also, the mobile communication network 104
Is a communication network called PDC / PHS, CDMA or the like, for example. Then, the switching system 1-1, 1 of the present invention.
-2 and 1-3 perform conversion of various signals including information and the like communicated between users from various communication networks, and analyze and convert control signals such as connection requests / responses and disconnection requests / responses. Thus, connection between different communication networks can be realized.

FIG. 2 shows a schematic configuration diagram of a switching system to which the present invention is applied. The switching system 1 includes a switch (S
W) 11, ATM interface (ATMIF) 12,
STM interface (STMIF) 13, IP interface (IPIF) 14, Signaling device (SIG device) 1
5, a processing device (CP) 16, a management and maintenance device (OAM device) 17, and a response device 18. Further, the ATM communication network 101 can include a mobile communication network 104 such as CDMA. The STM communication network 102 may include a mobile communication network 104 such as a PDC / PHS. Here, the Internet or the like is used as the IP communication network 103.

An interface with a heterogeneous network is firstly an AT
The MIF device 12 performs an interaction with the ATM communication network 101 and a mobile communication network 104 such as CDMA. The STMIF device 13 performs interaction with the STM communication network 102 and the mobile communication network 104 such as PDC / PHS. Also, the IPIF device 14
Performs an interaction with the IP communication network 103.

In the switching system 1, the switching connection with these heterogeneous networks is performed by switching SW1 between the interface devices.
This is realized by connecting via the 1. As the SW 11, for example, an ATM switch can be used. The signal processing with each network is performed by the SIG device 15.
The audible sound transmitted / received to / from each network when necessary is sent to a response device 18 such as a TKY device or a PBS / R device.
The control is performed. In addition, the OAM device 17 performs a test and various maintenance functions with each interface device and the opposing network via the interface.

Each of the above-described devices in such a switching system is collectively controlled by the CP 16. Each device-specific control firmware can be downloaded to each device and executed. However, for the purpose of controlling the entire switching system, a platform program such as a driver, a kernel, and a device management program that comprehensively controls each device as a system. Can be loaded into the CP 16 and executed. Further, the application program of the present system can also be loaded and executed on the CP 16.

Next, a communication control method by the IP handler according to the present invention will be described. FIG. 3 shows a configuration diagram of a communication system according to the present invention. Here, as an example, the present invention is applied to the interwork between the IP network 10 and the ATM network and the mobile network, but is not limited to this, and can be applied to an appropriate network and a combination thereof.

This communication system comprises an IP network 10, an IP handler (IPH) 20, an ATM switch (ATMSW).
30, a processor (PROC) 40, a storage unit (HLR /
VLR (Home Location Register / Visitor Location Re)
gister)) 50, base station (BS) 60 and mobile station (M
S) 70 is provided. Further, IPH20 is IP / AT
It has an M conversion unit 21 and a registration table 22. IP /
The ATM converter 21 converts between an IP header and an ATM header. The registration table 22 is a table that stores the correspondence between the IP header and the ATM header. The registration table 22 stores, for example, HL under the control of the PROC 40.
Information or the like indicating the IP / ATM correspondence read out from the R / VLR 50 is registered. The IP / ATM conversion unit 21
The information registered in the registration table 22 is read. Although not shown, the communication system further includes a signaling device (SIG device), a maintenance management device (OAM device), and the like (see FIG. 2).

FIG. 4 is a diagram for explaining the operation of the communication system according to the present invention. Hereinafter, an outline of the operation when an incoming call is received from the IP network 10 will be described. The numbers in parentheses below correspond to those in the figure.

(1) First, the IPH 20 receives an IP packet from the IP network 10. (2) Here, it is assumed that this IP information (IP header) has not been registered on the registration table 22. In this case, IP
The H20 notifies the PROC 40 of the IP information.
If the IP information has already been registered in the registration table 22, the IP / ATM conversion unit 21 converts the IP header into an ATM header according to the IP information and transfers the IP packet. (3) PROC40 refers to HLR / VLR50,
User information collection and / or route information is acquired from the notified IP information. (4) The user information obtained by the PROC 40 is set in the IPH 20. In parallel with this, the ATNSW 30
A communication route between the ATM network and a user such as the MS 70 is secured. (5) The IP / ATM converter 21 converts the IP header into an ATM.
Converted to a header, and the IP packet received in (1)
Transferred to user. (6) After that, when the user information is registered in the registration table 22 when the IP packet is received,
Transfer the P packet.

FIG. 5 is an explanatory diagram of the IP header and the ATM header in the communication control operation. here,
As an example, transmission and reception of these headers between the mobile station MS 70 and the IP network 10 will be described.

In the communication from the MS 70 to the IP network 10, first, when the MS transmits an IP header A to the BS 60,
In step S60, an ATM header A is added to the packet, and the packet is transmitted to the ATM network. The ATM network changes the ATM header A into the ATM header B for the IP network, and transmits it to the IPH 20. I
PH 20 deletes the ATM header and replaces IP header A with I
It transmits to the P network 10. Similarly, in the communication from the IP network 10 to the MS 70, the ATM headers C and D are added or deleted from the IP header B and transmitted.

FIG. 6 is a diagram showing a database configuration of the HLR / VLR according to the present invention. In this figure, as each user information, for example, a user 600, an ATM header 601,
The number of IP registrations 602, the IP header 603, the user attribute (1) 604, the user attribute (2) 605, and the like are included. The number of registered IPs 602 and the user attribute (1) 604
The user attribute (2) 605 and the like may be omitted as appropriate, or may further include other information. The IP registration number 602 is the number of IP headers possessed by one user or one terminal.

The user attribute (1) 604 and the user attribute (2) 605 store appropriate information such as traffic characteristics and individual information within IPH in IPH. The traffic information is notified when the user information is read from the PROC 40 or when the user information is deleted. PROC
40 can update the user information such as the registration status based on the information of the user attribute. As a result, control adapted to user traffic can be performed.

In this figure, for example, four pieces of user information are registered for the user A. For an ATM header 601 of “0” and an IP registration number 602 of “4”,
When the IP header 604 is “192.73.9.9” or “19
2.73.9.10 ", 192.73.10.11"
And "192.73.10.200" are stored.

FIG. 7 is an explanatory diagram of the user information stored in the IPH registration table according to the present invention. In this figure, as each user information, for example, user 700, A
TM header 701, IP registration number 702, registration status 70
3, an IP header 704, a user attribute 705, and the like. Note that the number of IP registrations 702, the registration status 703, and the user attribute 701 may be omitted as appropriate, or may further include other information. The IP registration number 702 and the registration status 703 are as described above. Registration status 703
Here, as an example, represents a state in which the registration of the IP is managed at four levels of the main registration, the temporary registration 1, the temporary registration 2, and the unregistered. Note that the provisional registration can be further divided into a plurality of stages or one stage. User 70
When 0 has a plurality of IP addresses, it is assumed that the access is performed by sequentially changing the IP address, for example, in the case of performing processing for confirming a mail or the like. Registration status 703
Is IP for simplicity in such cases.
This is the setting for registration. Also, the user attribute 705
, Based on the traffic characteristics stored in the HLR / VLR 50 and the user attribute (1) 704 or the user attribute (2) 705 such as individual information within IPH, or other information,
Data appropriately extracted is stored.

In the figure, for example, since user A has four IP addresses, four pieces of user information are registered. That is, the ATM header 701 is "
0, the number of IP registrations 702 is “4”, the IP header 704 of the main registration is “192.73.9.9”, the IP header 704 of the temporary registration 1 is “192.73.9.10”, and the temporary registration 2 Of the IP header 704 are “192.73.10.11” and “192.73.10.200”.

FIG. 8 is an explanatory diagram of the IP header search table of the IPH. When the IPH 20 determines a connection route, it can search based on such an IP header search table. The IP header search table is configured for each registration state. Further, the structure of each table is the same, and FIG.
FIG. 8B shows the IP search table of the temporary registration 1 shown in FIG.
Indicates an IP search table of temporary registration 2. FIG.
The user information of the main registration shown in (A) indicates that the IP header is currently being used. Note that these tables are stored in the IPH 20 or in another appropriate storage device.

FIG. 9 is a first sequence diagram showing a communication control operation according to the present invention. This is because the IP network 10 is a transmission source and the destination is an ATM network or a mobile network (BS60, MS7).
FIG. 9 is a sequence diagram illustrating an operation when the state is 0).

When an IP packet is transmitted from IP network 10, IPH 20 receives it. The IPH 20 extracts an IP header IP (A: a) for the user A and the user information a in the received IP packet, and extracts the IP (A:
In a), the registration table 22 is searched by IP. Where IP
If (A: a) is not registered in the registration table 22, PRO
The IP (A: a) is notified to C40. PROC40 is
With reference to the HLR / VLR 50, the user information a related to the IP (A: a) is read, and other user information b, c, and d related to the user A are also read. Next,
In the PROC 40, the user information a, b, c and d read by the HLR / VLR 50 are registered in the registration table 22 in the IPH 20, and the table is updated. Also, P
The ROC 40 controls the ATMSW 30 in parallel with the registration to secure a communication path with the user A on the ATM network side. Further, the IP / ATM conversion section 21 in the IPH 20 converts the IP header into an ATM header ATM (A: a) of the user A and the user information a based on the user information a. ATMSW30 is based on ATM (A: a),
For example, the communication path between the user A of the MS 70 and the IP network 10 is connected to transfer an IP packet.

When an IP packet of the same user A and user information a is received again while the user information a for the user A is registered in the registration table 22, the IP (A: a) is converted to ATM (A:
a) and transfer the IP packet.

Here, when the IPH 20 receives the IP (A: b) of the user A and the user information b, since the user information b is already registered in the registration table 22, the IPH 20
0 can use this user information b. IP
The / ATM conversion unit 21 refers to the registration table 22 and
Convert IP (A: b) to ATM (A: b)
The ATM (A: b) is transmitted to the SW 30. ATMSW3
0 transfers an IP packet based on ATM (A: b). FIG. 10 shows a second sequence diagram illustrating the communication control operation according to the present invention. This is because the source is the ATM network or the mobile network (BS60, MS70) and the destination is the IP network 1
It is a sequence diagram showing operation | movement in case of being 0.

When a cell is transmitted from the ATM network, the ATM
The exchange receives this. In an ATM switch, PRO
C40 receives the user A and the user information a in the received cell.
SIG (A: a) is extracted, the user information a related to SIG (A: a) is read out by referring to the HLR / VLR 50 in SIG (A: a), and other information related to user A is read out. User information b, c
And d are also read. Next, in PROC40, HLR
The user information a, b, c and d read by the / VLR 50 are registered in the registration table 22 in the IPH 20, and the table is updated. PROC40 is an ATMSW
30 is controlled to secure a communication path with the IP network side in parallel with the registration. Further, the ATM exchange of the ATM network has an ATM header ATM for the user A and the user information a.
(A: a) is sent to the IPH 20. IP / within IPH20
The ATM conversion unit 21 converts the ATM (A: a) into the user A based on the user information a registered in the registration table 22.
And the user information a into an IP header IP (A: a). The IP network 10 is based on IP (A: a), for example,
The communication path between the user A of the MS 70 and the IP network 10 is connected to transfer a cell.

When the cell of the user A and the user information a is received again while the user information a for the user A is registered in the registration table 22, the registration table 22
, The ATM (A: a) can be converted to the IP (A: a), and the cell can be transferred.

When the IPH 20 receives the ATM (A: b) of the user A and the user information b from the ATM network, the user information b is already registered in the registration table 22. b can be used. The IP / ATM conversion unit 21 refers to the registration table 22 and converts the ATM (A: b) into the IP (A: b).
And the IP (A: b) is transferred to the IP network 10.
The IP network 10 transfers cells or packets based on IP (A: b).

Next, update and deletion of the registration table 22 will be described. FIG. 11 is an explanatory diagram of updating the registration status of the registration table. When an IP packet arrives from the IP network 10, if there is no corresponding user information in the registration table, the user information is read from the HLR / VLR 50. At that time, in the registration table 22, the read user information shifts from an unregistered state to a fully registered state. User information that has not been used for a certain period of time by the timer A after the main registration is set as the temporary registration 1. Further, the IP information that has been unused for a certain period of time by the timer B from the temporary registration 1 is set as the temporary registration 2. Note that the fixed time of the timer A is preferably set smaller than the fixed time of the timer B. The user information not registered in the registration table 22 is in an unregistered state. To be unregistered, timer C
, User information that has passed a certain period of time, or user information that has performed roaming. In this way, one or a plurality of registered user information is gradually reduced in registration level when it is not used, and further deleted from the registration table 22 according to the timeout time of each timer. In addition, if used when provisionally registered,
It will be changed to registration.

In the example shown in the figure, from the unregistered state, the main registration is performed by the arrival of the IP packet, and after the timer A times out, the main registration is performed again because the IP packet has passed.
Further, the assumption is made until the user information is deleted due to the timeout of the timers A, B, and C and the arrival of the IP packet.

Next, the specific configuration of the IPH 20 and the IPH 20
The parallel processing / pipeline processing for accelerating the processing in H20 will be described. FIG. 12 shows a detailed configuration diagram of the communication system of the present invention.

As shown, the IPH 20 includes a communication processor 501, a program work memory 502, a user data memory 503, a digital signal processor (DSP) 504, switches 505 and 506, and the like. The communication processor 501 has, in addition to the program work memory 502, a program storage memory, a signal processing memory, a signal termination device, a clock selection mechanism, an ATM cell selection mechanism, and the like. The DSP 504 includes a DSP program memory, a DSP program work memory, and the like. The user data memory 503 includes a DSP 504
Control is performed so that one of the switches 505 and 506 is turned on and the other is turned off so that both the communication processor 501 and the communication processor 501 can use the switches in a time-sharing manner. The communication processor 501 mainly executes processes such as search and creation of the registration table 22 of the IPH 20, reception and transmission processes, and the like. The registration table 22 is appropriately stored in the program work memory or the user data memory 503 or the like. The user data memory 503 stores data from the subscriber. The DSP 504 executes signal processing such as encryption / decryption processing and compression / decompression processing.

FIG. 13 is an explanatory diagram of the switching operation of the protocol processing by the communication processor and the DSP. In this configuration, as an example, in IP routing, where the processing of the protocol is complicated, high-speed routing is realized by leaving it to the DSP 504. Communication processor 50
1 receives a reception queue from hardware or the like, and after reception processing, queues the reception queue in a buffer of the user data memory 503. Next, the DSP 504 reads out this queue, executes signal processing such as encryption / decryption processing, compression / expansion processing, etc., and queues it again in the buffer of the user data memory 503. Communication processor 501
Accesses the queue after the transmission process, and transmits data to hardware or the like.

FIG. 14 is an explanatory diagram of the switching operation of the protocol processing by the communication processor and the DSP. As shown, for example, the switch 505 is turned on and the switch 506 is turned on.
Is turned off, the DSP 504 executes the compression / decompression processing (a) for the user Z, while the communication processor 50
1 writes (1) the user data memory for the user A. Next, the switch 505 is turned off and the switch 506 is turned on, so that the DSP 504
After writing (b) in the user data memory for the user A, reading (c) the user data memory for the user A is performed, while the communication processor 501 performs reception and protocol processing (2) for the user A. rear,
The transmission process (3) is executed for the user Z. Again, the switch 505 is turned on, the switch 506 is turned off, and D
SP504 performs encryption / decryption processing for user A (d)
On the other hand, the communication processor 501 performs reading (4) of the user data memory for the user Z.
Thereafter, similarly, the switches 505 and 506 are switched in a time-division manner, so that the DSP 504 executes processing such as encryption / decryption and compression / decompression, while the communication processor 501 executes reception processing and transmission processing. It realizes parallel processing.

The user information to be read from the higher-level device registers all related user information as described above, and also obtains statistics related to connection and the like from information on the corresponding user registered in the HLR / VLR 50. For example, a predetermined number of data may be stored in the registration table according to a predetermined order or the like. Also,
As the user information read from the higher-level device, a plurality of pieces of user information can be stored as a permanent registration depending on the usage status of the destination user. Further, in the above description, the case where the user information is searched for the IP header and the ATM header has been mainly described.
IP information or ATM information including part or all of the header,
Alternatively, the present invention can be applied so that each process is performed on appropriate information such as IP information or ATM information equivalent to an IP header or an ATM header.

[0056]

According to the present invention, when a user or a terminal has a plurality of IP addresses as described above,
It is possible to simplify a control procedure for an IP network, an ATM switch, and the like when making a call. According to the present invention, a control procedure in such a case can be simplified in consideration of IP traffic characteristics. Further, according to the present invention, the registration of the IP header and the ATM header is managed at each level such as the main registration, the provisional registration, and the non-registration, so that the registration table search at the time of receiving the IP packet is accelerated. And

[Brief description of the drawings]

FIG. 1 is a network configuration diagram showing a configuration of an entire communication network to which a switching system according to the present invention is applied.

FIG. 2 is a schematic configuration diagram of an exchange system to which the present invention is applied.

FIG. 3 is a configuration diagram of a communication system according to the present invention.

FIG. 4 is an explanatory diagram of an operation of the communication system according to the present invention.

FIG. 5 is an explanatory diagram of an IP header and an ATM header in a communication control operation.

FIG. 6 is a diagram illustrating a database configuration of an HLR / VLR according to the present invention.

FIG. 7 is an explanatory diagram of user information stored in an IPH registration table according to the present invention.

FIG. 8 is an explanatory diagram of an IPH IP header search table.

FIG. 9 is a first sequence diagram illustrating a communication control operation according to the present invention.

FIG. 10 is a second sequence diagram illustrating a communication control operation according to the present invention.

FIG. 11 is an explanatory diagram of updating a registration status of a registration table.

FIG. 12 is a detailed configuration diagram of a communication system according to the present invention.

FIG. 13 is an explanatory diagram of a switching operation of protocol processing by a communication processor and a DSP.

FIG. 14 is an explanatory diagram of a switching operation of protocol processing by a communication processor and a DSP.

FIG. 15 is a configuration diagram of a conventional communication system.

FIG. 16 is a configuration diagram of a conventional registration table.

FIG. 17 is a sequence diagram showing a conventional communication control operation.

[Explanation of symbols]

 Reference Signs List 10 IP network 20 IP handler (IPH) 21 IP / ATM conversion unit 22 Registration table 30 ATM switch (ATMSW) 40 Processor (PROC) 50 Storage unit (HLR / VLR) 60 Base station (BS) 70 Mobile station (MS)

Continued on the front page F term (reference) 5K030 HA10 HC01 HC09 HC14 HD06 LB05 LB15 5K033 CB08 DA05 DA19 DB18 EC03 5K034 EE03 EE09 HH01 HH02 HH06 HH61 9A001 CC06

Claims (14)

[Claims] Receiving first IP information about a first user and first user information; and determining whether the first user information about the received first IP information is present in a registration table; And if the first user information is found in the registration table as a result of the search, executing a conversion between IP information and ATM information in accordance with the user information; and, as a result of the search, the first user If the information is not in the registration table, the upper-level device is notified of the IP information, so that the first user information from the higher-level storage device and the other user information when there is other user information relating to the first user are present. And register these user information in the registration table,
IP information and ATM according to the registered first user information
Executing the conversion with the information. 2. Receiving second IP information about the first user and second user information; and receiving the second user information already registered in the registration table for the received second IP information. According to IP information and AT
Performing the conversion with M information. The communication control method according to claim 1, further comprising: Receiving the first ATM information or signaling information for the first user and the first user information; and notifying the higher-level device of the ATM information or signaling information, thereby allowing the higher-level storage device to transmit the first ATM information or signaling information. If there is user information of the first user and other user information related to the first user, the other user information is read out, and these user information are registered in a registration table.
Performing a conversion between P information and ATM information. 4. When a higher-level device is notified of IP information to search for a higher-level storage device, the higher-level device is searched for via an exchange switch or directly.
The communication control method according to any one of claims 1 to 3, wherein necessary user information is obtained. 5. The user information read from a higher-level device is an IP address.
The communication control method according to any one of claims 1 to 4, wherein the communication control method includes only information relating to conversion between information and ATM information. 6. The user information to be read from the higher-level device is obtained from the user information on the corresponding user by obtaining statistics on connection or the like or storing a predetermined number of data in a registration table in a predetermined order. The communication control method according to any one of claims 1 to 5, wherein: 7. The communication control method according to claim 1, wherein said IP information and said ATM information are an IP header and an ATM header, respectively. 8. As a result of the search in the search step, if the corresponding user information is not found in the registration table, the first user information is permanently registered from the higher-order storage device, and the other user information is temporarily registered. 8. The communication control method according to claim 1, wherein priorities are set if necessary, and stored in a registration table. 9. The communication control method according to claim 1, wherein a plurality of pieces of user information read from a higher-level device are stored as a plurality of main registrations. 10. The method according to claim 1, wherein when the IP packet has been transmitted, when roaming has occurred, or when a certain period of time has elapsed without being used, the user information of the official registration is changed to a temporary registration. The communication control method according to claim 8 or 9, wherein 11. The user information stored as a permanent registration or a provisional registration is deleted from the registration table when the user information is not used for the same fixed time or different fixed times. 3. The communication control method according to 1. 12. The communication control method according to claim 8, wherein when the temporarily registered information is used within a predetermined time, the temporary registration is changed to a permanent registration. . 13. A process in which reception and transmission processing based on user information registered or provisionally registered in a registration table and signal processing such as encryption / decryption processing and compression / expansion processing are performed in a pipeline or in parallel. Claims 1 to 1
3. The communication control method according to any one of 2. 14. A registration table for storing user information including a user, IP information, ATM information and a registration status, and an IP address according to the user information stored in the registration table.
An IP / ATM conversion unit for converting information and ATM information, wherein the IP / ATM conversion unit includes a first user and a first I / O for the first user information.
Receiving the P information, searching for the first user information relating to the received first IP information in the registration table, and as a result of the search, if the first user information is in the registration table; According to the user information, conversion between IP information and ATM information is executed, and as a result of the search, if the first user information is not in the registration table, the upper device is notified of the IP information. The first user information and the other user information when there is other user information relating to the first user are read out, these user information are registered in the registration table, and according to the registered first user information, IP information and A
A communication control device that performs conversion with TM information.