JP2000286900A - Multimedia signal processor and communication network control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To economically communicate signals with diversified types and at various transmission rates with high reliability such as audio, picture and high speed data. SOLUTION: An MSP 70 of this multimedia signal processor selects a specific ATM IF 10-1 on the basis of a caller network a called network and types of data or the like and rewrites a header of an ATM cell to select a prescribed SPU 750-m as a destination. An AAL CLAD 7000-m of the SPU 750-m disassembles the ATM cells and extracts, e.g. audio information. A decoder 7210 receives the audio information to select an audio signal processing section 7230, where the audio information is converted according to a prescribed protocol stack. An AAL CLAD 7100-m assembles the converted data into an ATM cell of an AAL type suitable for a called party via a selector 7220. An ATM IF 710-1 rewrites a header of the ATM cell to reach a proper destination and outputs the resulting cell.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multimedia signal processing apparatus and a communication network control system, and more particularly, to a plurality of types of media which interconnect a wireless communication network and another communication network and communicate at various speeds. The present invention relates to a multimedia signal processing device and a communication network control system for a multimedia communication network suitable for handling audio / image / data).

[0002]

2. Description of the Related Art In today's digital communication network, in addition to a conventional wired communication network using a metallic wire or an optical fiber, a communication network using a radio as a signal transmission medium, such as a mobile communication network, is increasing. . This mobile communication network is described in the existing STM communication network (Synchronous Transfer Mode) communication network and "Easy Digital Switching" issued by the Telecommunication Association, as shown in "Mobile Communication Handbook" issued by Ohm Company. A time-division communication network in which signals are transmitted in time-division time slots in synchronized frames as described above.
PDC that communicates by placing signals in time slots as in
(Personal Digital Cellurar) and PHS (Personal Ha
ndyphone System) communication network, and CDMA (Co) that modulates and communicates using a different code for each signal as shown in "Easy Digital Mobile Communication" issued by the Telecommunications Association.
de Division Multiple Access) communication network.
Furthermore, "Nikkei Electronics n" issued by Nikkei BP
o. 680 "on page 85 and beyond
MA (hereinafter referred to as W-CDMA (Wide band CDMA)) has a quality similar to that of an existing wired communication network even when signals of various types and speeds such as voice, image, and high-speed data are moved at high speed. It is a communication network that attracts attention as a communication system that can transmit and receive, and is expected to be rapidly introduced.

On the other hand, the current communication network is an STM communication network, or a packet communication network that carries out communication by putting a signal on a variable-length packet as shown in "Basic knowledge of data exchange" issued by the Telecommunications Association. Also, "B-ISD" issued by Ohmsha
As shown in "N picture book reader", an asynchronous transfer mode communication network (hereinafter referred to as ATM) that carries a signal by carrying a signal in a fixed-length packet called a cell.
In addition, as shown in "Mastering TCP / IP" issued by Ohmsha, a signal is placed on a variable-length packet called an IP packet, and communication of the IP packet is performed according to a procedure called Internet Protocol (IP). There are various communication networks, such as an IP network (Internet), which communicates voice, image, and data media.

[0004]

The actual communication networks and communication systems described above have been independently developed and introduced, and the signal formats (speed / format) and communication procedures (signal system, protocol, etc.) And so on). In addition, 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 an operation system, the configuration of a hardware / software interface, and the function and configuration of communication application software) are also required. Differences exist.

[0005] From the communication network users who send and receive information using the communication network and the providers who provide the communication network, the differences between the above communication networks are eliminated (or absorbed), and the configuration and procedure of the communication network are eliminated. The ability to communicate with the other party using a communication service that can optimally communicate information with the device (terminal) you want to use when you want to use it without worrying about the communication equipment improves the usability of the communication equipment and reduces the communication cost, It is eager to lead to social development and contribution.
That is, a communication network integrating the various communication networks described above,
It is an object of the present invention to provide a communication network control system / communication control device capable of interworking between networks which can communicate with each other with a simple control by absorbing a difference between communication networks and a control method thereof. Desired. In particular, W-CDMA
Mobile communication networks are expected to develop rapidly in the future, and it is important to construct an integrated communication network by interconnecting various existing communication networks and mobile communication networks.

An object of the present invention is to realize integration or interconnection between a mobile communication network as described above and an existing communication network.

Further, the present invention provides a multimedia signal processing apparatus and a communication network control system suitable for controlling a communication network in order to realize integration or interconnection between a mobile communication network and an existing communication network. A mobile communication network control system suitable for realizing integration or interconnection between a mobile communication network and an existing communication network, and a mobile communication system, and a method for providing a network control device and a control method thereof with a simple configuration and procedure. An object of the present invention is to provide a communication network control device and a control method thereof with a simple configuration and a simple procedure.

According to the present invention, for example, in a state where an existing communication network is left as it is, the communication capability and the provided service originally provided in the communication network are maximized, and further, the communication of the mobile communication network is performed. Connect the mobile communication network to each existing communication network so as not to impair the capabilities and services to be provided, and perform necessary signal conversion, exchange or control processing to implement interconnection and communication service provision. A simple configuration of a multimedia signal processing device, a communication network control system, a communication network control device, and a control method thereof for providing information from a terminal of a communication network to a desired destination to a desired destination when desired. And to provide in the procedure.

Further, the present invention provides a communication system in which a communication network control system accommodates an exchange system for connecting a mobile communication network to an existing communication network, and performs interworking between the mobile communication network and a heterogeneous communication network. To provide a communication control system and a control method for realizing a service, in which it is not necessary to be aware of a control method peculiar to the opposite communication network, and only to be aware of a control method as a single interface device. With the goal.

In order to receive a call to a mobile terminal accommodated in a mobile communication network, the network must know which radio base station the mobile terminal of the called party exists under. . For this purpose, it is necessary to send a location registration request signal issued by the mobile terminal to the location registration management station via the base station control station, and register which radio base station is under control. Since a mobile station may move at all times, it is necessary to prevent a call loss by calling a plurality of radio base stations as one unit. Accordingly, an object of the present invention is to provide a multimedia signal processing device, a communication network control system and a device, and a control method therefor, which enable connection with a heterogeneous network while solving the problems unique to mobile communication.

When a mobile terminal moves to a service area of another radio base station while communicating, a process (handover) for switching a radio base station to communicate with is required. In particular, in CDMA, since diversity handover is performed while simultaneously communicating with a plurality of radio base stations, communication information for a mobile terminal must be copied on the network side and passed to a plurality of radio base stations involved in the handover. Therefore, exchange of control signals related to handover on the network side becomes complicated, and communication traffic accompanying the handover imposes a heavy burden on the network. In particular, when the handover destination and the handover source radio base station are under the control of different base station control stations, it is necessary to transmit and receive control signals between the base station control stations, so that the processing becomes more complicated.
Accordingly, it is an object of the present invention to provide a communication network control system and an apparatus and a control method thereof that can simultaneously connect to heterogeneous networks while solving the problems unique to CDMA mobile communication.

In W-CDMA, it is necessary that signals of various types and speeds such as voice, image, and high-speed data can be communicated with high reliability and economically. According to the present invention, in order to transmit and receive information between a user of a mobile communication network and a user and to guarantee mutual connection between mobile communication networks or between a mobile communication network and a terminal of a heterogeneous communication network, necessary code conversion and encryption are performed. It is an object of the present invention to provide a multimedia signal processing device and a communication network control system for performing processing such as conversion and matching with a signal format of an existing communication network.

[0013]

In order to solve the above-mentioned problems, a communication network control system according to the present invention comprises a fixed-length packet as a switch for connecting devices of a mobile communication network and exchanging signals. AT that exchanges (cells) asynchronously
An M switch is provided to connect each device to the switch to convert / invert a signal from the device to a cell and to convert a control signal and a control procedure from each device to a procedure for internal use in the communication network control system. Various communication interfaces for reverse conversion are provided.

In a conventional mobile communication 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 communication network control system of the present invention has a function of interfacing with each communication network and other mobile network devices and converting signals transmitted and received between the communication networks into ATM cells. It has a procedure for transmitting and receiving control signals necessary for information transfer to and from the communication network, and a function for terminating the signals. The control signal transmitted and received between the communication networks performs information transfer between the communication networks, and By exchanging information to be transferred by the ATM switch, it is possible to interconnect a plurality of different communication networks.

In the present invention, an ATM is used between each block.
The number of types (types) of signal processing units that transfer and connect cells with an ATM switch and absorb differences in signal formats and processing procedures according to the communication network are provided by unifying the interface into a cellized interface. The control device controls the communication network control system corresponding to the request while selecting the signal processing device in response to the request from the network. Further, in the present invention, each functional block of the signal processing device and the like is configured so that a signal to be transmitted is converted into an ATM cell and transferred.

Since the ATM switch is configured to transfer (self-routing) ATM cells between functional blocks while preventing cell collision, a path is provided between the functional blocks in the ATM switch, and communication is performed using this path. By selecting a functional block that executes control to be processed in the network control system and transferring information, each functional block can proceed with the processing.

Further, in order to solve the above-mentioned problems, the present invention includes a multimedia signal processing device for transferring, terminating, and converting various media. In particular, the present invention includes a signal processing unit that performs unique signal processing corresponding to audio, video, data, and the like.

According to the first solution of the present invention, an ATM interface for rewriting or adding an input asynchronous transfer mode cell (ATM cell) to a header addressed to a predetermined device and outputting the same is provided. A single or a plurality of types, a signal processing unit for processing inter-user information corresponding to various media with respect to an input ATM cell, a control signal processing device for transmitting and receiving a control signal relating to processing by the signal processing unit, A switching unit that accommodates an ATM interface, the signal processing unit and the control signal processing device, and performs switching; and a signal processing unit by the switching unit based on a control signal received by the control signal processing device. Multimedia signal processing device having processor for controlling connection to ATM interface To provide.

According to a second solution of the present invention, there is provided a communication network control system including such a multimedia signal processing device and performing control for transferring information by connecting a plurality of types of communication networks. And a plurality of interfaces for converting signals from a plurality of connected devices into cells (ATM cells) in an asynchronous transfer mode, and a plurality of diversity handover processes for performing processes related to diversity and handover of wireless terminals. A device, a plurality of demultiplexing devices for demultiplexing control signals and information between users for each function, and comprising a plurality of input lines and output lines, the multimedia signal processing device, the interface, the diversity handover processing device, ATM containing said demultiplexer and received on one of the input lines from said interface Le provides a communication network control system comprising a ATM switch to be transferred to one of a plurality of output lines based on the header information of the ATM cell.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multimedia signal processing device, a communication network control system, a communication control device,
Embodiments of the configuration of a communication network using the system and the apparatus and a communication network control method / connection control method will be described with reference to the drawings. The embodiments of the present invention described below are merely examples. The multimedia signal processing apparatus, the communication network control system, the communication control apparatus, and the control method of the communication network using the same according to the present invention are described below. Communication network, ST
The present invention is also applicable to interconnection between other types of communication networks such as an M communication network and an IP communication network.

FIG. 1 is an example of a configuration diagram of a communication network using the communication network control system of the present invention.

The communication network is a communication network control system 1 of the present invention.
CDMA, W-CDM,
Mobile communication network 101 such as A, PDC, PHS, etc., ATM communication network (for example, cell relay network) 102 for transmitting and receiving information using ATM cells, IP communication network for transmitting and receiving information using IP packets (for example, OCN provided by NTT) 103, STM for transmitting and receiving information in time-division multiplexed time slots
A communication network (for example, a digital switching network or an INS64 communication network provided by NTT) 104 or the like is connected.

The communication network control system (hereinafter, GW) of the present invention
1) is connected to the mobile communication network 101, controls the mobile communication network 101, and terminates and converts a signal unique to the mobile communication network. When communication is performed between the terminal CS of the mobile communication network 101 and the terminal 106 of a user accommodated in another communication network,
The GW 1 is configured to transmit and receive control information necessary for communication and information to be communicated with an exchange system (hereinafter, may be abbreviated as NS) 2 for connecting heterogeneous networks. Each GW1
The NS2 and the NS2 are appropriately connected to each other, accommodate various communication networks, and connect the mobile communication network to other heterogeneous communication networks. still,
The configuration may be such that the GW 1 and the NS 2 are combined into one system or device.

FIG. 2 is a block diagram schematically showing a communication network control system according to the present invention.

The communication network control system (GW) 1 is an ATM
A switch (ATMSW) 10, an ATM interface (ATMIF) 20, a diversity handover processor (D) for executing diversity and handover, etc.
H) 30, a demultiplexer (MUX) 40, a signal processor (SIG) 50, a controller (CP) 60, a multimedia signal processor (MSP (Mulutimedia Signal Processor)
r (or Processing unit) 70 and trunks 80.

The ATMSW 10 includes various information (voice, image, data, etc.) transmitted and received between users converted into ATM cells, the processor of the control device 60 and each device (a communication network or a communication network interface device, a This is an ATM switch for exchanging control information transmitted / received with each functional block) using a signal having a configuration in which an information section of an ATM cell is inserted. The GW 1 connects to a large number of mobile communication networks 101 and various communication networks. Since the ATM SW 10 is desirably a switch that does not cause cell loss, a common buffer type ATM switch (for example, Japanese Patent Laid-Open No. 2-1669).
In this case, an economical and highly reliable communication network control system can be realized. ATMIF20 is A
It has an interface function with the TM communication network. Note that an IPIF having an interface function with the Internet
25 may be further provided. The SIG 50 has a function of transmitting / receiving a control signal to / from a mobile communication network, another GW 1 or NS2, or another functional block in the system as described later. Note that the SIG 50 may be provided inside an appropriate interface. The control device 60 controls the entire GW.
Processing of control signals transmitted and received between the functional blocks and control of exchange of control information and information between the functional blocks are performed. The trunks 80 are devices such as a copy trunk for copying an ATM cell for paging or broadcasting to a mobile terminal of a mobile communication network.

Diversity handover processor (DH) 30 for executing diversity, handover, etc.
Is provided to prevent instantaneous call interruption and quality deterioration when the mobile terminal CS moves during communication in the mobile communication network 101. Handover and signals transmitted and received with a plurality of base stations BS during handover are provided. This is a device that executes diversity to select and generate a signal with excellent call quality based on the signal. The multiplexer / demultiplexer (MUX) 40 transmits / receives various control signals (call setting, location registration, handover processing) transmitted / received by the mobile communication network and terminals, for example, under discussion by the Radio Industry Association (ARIB). This is a device that performs demultiplexing processing on user-to-user information (audio, video, and data) and transmits and receives the functional blocks to be processed. The multimedia signal processing device (MSP) 70 transmits and receives information between users in a mobile communication network and users, and guarantees interconnection between mobile communication networks or between mobile communication networks and terminals in heterogeneous communication networks. This is a device that performs necessary processing such as code conversion and encryption, and matching with the signal format of the existing communication network.

In the present embodiment, NS2 is disclosed in Japanese Patent Application Nos. 11-40287 and 11-5495.
The switching system described in No. 9 can be used.

FIG. 3 is a block diagram showing the outline of the switching system.

The switching system 2 has an ATM switch (AT
MSW) 210, ATM interface (ATMIF)
220, STM interface (STMIF) 230,
It includes an IP interface (IPIF) 240, a signal processing device (SIG) 250, a processing device (CP) 260, trunks 270, and a management and maintenance device (OAM) 280.

The ATMSW 210 is used to transmit and receive various information (voice, image, data, etc.) between users converted into ATM cells, and between the processor of the control unit 260 and each device (communication network or communication network interface device). Is an ATM switch for exchanging control information transmitted and received by a signal having a configuration in which information information is contained in an ATM cell. ATMIF220
Has an interface function with an ATM communication network. S
The TMIF 230 has an interface function with the STM communication network. The IPIF 240 has an interface function with the Internet. The SIG 250 has a function of transmitting and receiving a control signal to and from each communication network, and a plurality of SIGs 250 can be provided according to required signal conversion, protocol conversion, and the like. The control unit 260 controls the entire switching system, processes call control signals exchanged with each communication network, and performs switching control. The trunks 270 are a response device such as a talkie, or a device having functions necessary for realizing various services. The management and maintenance device 280
This block performs monitoring, maintenance, management, clock supply, and the like of the switching system.

The present switching system is for connecting to various communication networks. Since the ATMSW 210 is desirably a large-capacity switch that does not cause cell loss, a common buffer type ATM switch (for example, Japanese Patent Application Laid-Open No. 2-1669) is preferred. And the like, and a cell division type ATM switch (for example, see Japanese Patent Application Laid-Open No. 4-98917) can realize an economical and highly reliable switching system. In this specification, a signal having a configuration in which control information and the like are put in the information section of an ATM cell may be simply referred to as an in-channel.

For example, when a terminal of the ATM communication network 102
When a call is made to a terminal of the TM communication network 104, a signal for controlling the connection is sent from the ATMIF 220 to the ATMSW 210 and the S
The data is input to the control unit 260 via the IG 250. When the control unit 260 confirms the availability of the terminal of the STM communication network 104 by the call connection control, the control unit 260 uses the ATMIF 210 in-channel.
And STMIF 230 are set and controlled.
ATMSW210 between F220 and STMIF230
The terminal operates so that information can be exchanged and converted between terminals via the PC and transmitted and received. If there is a connection request from the terminal to the Internet 103, an IPIF
240 is selected and the same operation is performed. Also, a necessary talkie or trunk can be selected from the trunks 270 during communication control and connected to each communication network interface.

Next, the configuration and operation of the communication network control system of the present invention will be described in detail.

FIG. 4 is a block diagram showing a detailed configuration of the communication network control system of the present invention. In this figure, in particular, the configuration and arrangement of the SIG 50 configuring the GW are shown in detail. A dotted line in the ATMSW 10 indicates that a representative connection is established, for example.

The GW 1 of the present invention is the NS 2 of the mobile communication network 101 or the ATM communication network (multimedia communication network) 100.
And a plurality of ATMIFs 20-1 to 20-i (mobile communication network 10
1), ATMIF 20-i + 1 to j (for NS2), ATMIF 20-j + 1 to 20-m (for GW), DH30-1 to 1, and MUX40-1 to o,
Each of the SIGs 50-1 to 50-n, the control device 60 including a plurality of processors for controlling the GW, the MSP 70, and the trunks 80 is connected to the ATMSW 10 as illustrated.

The SIGs 50-1 to 50-n correspond to the mobile communication network 10.
1 mobile terminal CS, base station BS, and ATM network 100 (NS
2), other GW, IP network 103, other functional blocks (DH30, MUX40, MSP70, etc.) in the system and A
This device is connected via the TMSW 10 and performs processing of control signals input and output from respective networks and devices, specifically, communication processing such as control signal signal format, protocol conversion, and termination processing. Individual and multiple types are ATMSW
10 is accommodated. In the present embodiment, Japanese Patent Application No. 11-5
As described in No. 4959, SIG50-1 to SIG50-n are provided to absorb, convert and terminate differences in signal formats and communication protocols of signals transmitted to and received from various communication networks and devices (communication processing).
The communication-processed signal is transmitted / received to / from the control device 60, or the communication-processed signal is transmitted / received to / from each interface with another communication network. That is, S
The IGs 50-1 to 50-n convert and absorb the difference between the control signals and convert them into a signal of a unified control unit interface, or convert information between communication network interfaces to transfer information between different communication networks. Is what you do. S
Even if control signals having various forms and procedures are input and output from each communication network by such a conversion operation, the IGs 50-1 to 50-n analyze and process the control signals by the control device 60 and perform call processing and the like. Software for providing a communication service requested by a user can be operated. SIG5
0-1 to n may be a load distribution type configuration as required.

The control device 60 has a resource management processor (RM) having a function of managing resources of the entire GW 1.
P) 640, a maintenance / operation processor (OMP) 650 having a function of performing maintenance / operation of the GW and an interface function of communicating with an externally provided maintenance / operation center, I
TU-T (International Telecommunication Union,
A common channel signal processor (CSP) 620 having a function of processing a common channel signal and an interface function with a common channel signal network specified in the recommendation of the International Telecommunication Union, terminating call control signals from each communication network Call processing processor (CLP) 630 for implementing switching control functions for multimedia calls
, And the function is distributed among the processors to control the entire GW1. More specifically, a dedicated ATM for transferring messages exchanged between processors.
An ATM HUB 610, which is a switch, is provided to connect the processors to control the GW1. In addition,
Each of the CLPs 630-1 to 630-k can be configured by a plurality of processors according to the capacity (load) of the GW, and the load can be distributed among the plurality of CLPs 630-1 to 630-k. The switches used for the ATM HUB 610 are as follows:
Since the switches connect the processors and do not require a switch having a large capacity as compared to the ATMSW 10, a switch similar to the ATMSW 10 having a smaller capacity may be used. The ATM HUB 610 has a configuration in which all processors are directly connected by lines, and messages are exchanged based on the address of the cell header. The details of the control device 60 are described in Japanese Patent Application No. 11-47959.

The diversity handover processing device (DH) 30 is provided for accommodating the mobile communication network 101 in the multimedia communication network. In the mobile communication network (CDMA), the mobile terminal CS is in communication with the mobile terminal CS. When a handover is performed in response to the above, a plurality of paths are set between the terminal CS and the plurality of base stations BS and the GW 1, and information is transmitted and received. This is a device that executes diversity for selective generation. In the GW 1 of the present invention, a plurality of DHs 30-1 to 1
A configuration in which a handover request from the CS (or BS) is received in the TMSW 10 and one of the SIGs 50 analyzes this request, and the control device 60 selects and specifies an appropriate DH to perform diversity at the time of handover. did.
With this configuration, the GW 1 of the present invention ensures that the handover process and the diversity process are executed even when a large number of paths are set at the time of handover because a large number of terminals BS in the mobile communication network move at high speed. Thus, it is possible to provide a communication system in which instantaneous call interruption and deterioration of call quality do not occur during movement.

For example, as discussed in the Association of Radio Industries and Businesses (ARIB), in a mobile communication network, in addition to control signals for call connection control of an existing wired communication network, various types of mobile communication networks are used. (Position registration, handover processing, etc.) or from the terminal CS or the base station BS.
In addition, the bandwidth of information (signals) transmitted and received between terminals is wide, and various types of information between users (voice, image, data)
Is transmitted and received. Further, in a state where these control signals and information between users are mixed (multiplexed) in a packet-like format, they are transmitted and received at random timing and lines (ATMIF 20) from moving terminals CS and base stations BS. . The demultiplexer (MUX) 40 transmits and receives control signals and user-to-user information transmitted / received to / from the mobile communication network with the above-described various and complicated timings and configurations to / from functional blocks in which the respective signals must reliably process. This is an apparatus for performing identification and demultiplexing processing on signals transmitted and received with a mobile communication network. In the GW 1 of the present invention, a plurality of MUXes (40-1 to o)
Is accommodated in the ATMSW 10, and a large amount of signals transmitted / received to / from the mobile communication network are distributed to an appropriate MUX and processed. Here, various control signals and information between users are divided,
The control information is transmitted / received to / from an appropriate SIG, processed by the control device 60, the operation of the GW1 (control of the communication network) proceeds, and connection between the mobile communication networks or between different mobile communication networks is executed. Further, the inter-user information is transmitted / received to / from the destination device based on the connection control.

In general, mobile communication networks (CDMA, W-C
In DMA, the band of information (signal) transmitted and received by a user at a terminal is wide, and various types of inter-user information (voice,
(Images / data) is transmitted / received, so that various communication services can be provided. On the other hand, even in the existing communication network, A
There are communication networks such as a TM communication network that can handle multimedia in broadband communication and provide various communication services. The multimedia signal processor (MSP) 70 transmits / receives information between users to / from a terminal of a mobile communication network, and processes the information between users by encoding or encryption so as to provide various communication services. Alternatively, in order to enable communication with heterogeneous terminals, conversion of encoding rules and encryption rules and conversion of media are performed. Further, in order to guarantee mutual connection with terminals of the existing heterogeneous communication network, the apparatus performs necessary processing such as code conversion and encryption and performs matching with the signal format of the existing communication network. In the GW 1 of the present invention, such an MSP is referred to as an ATM.
The information between the users accommodated in the SW 10 and transmitted / received in various formats from various lines to various destinations is once ATMS.
An economical system has been realized as a configuration for collecting and processing all via W10. Note that the MSP may be installed as a separate device outside the GW 1 and a system in which a plurality of GWs 1 share the MSP may be used.

The signals from the above-described functional blocks (each communication network interface, SIG, each processor) are all converted into ATM cells 1000, 1100, and 1200, except for messages transferred between a plurality of processors for control. , The logical path set in the ATMSW 10 (FIG. 4,
The transfer between the blocks is performed using a path set between the dotted lines in the ATMSW 10). Specifically, as described in JP-A-63-72293, when each functional block adds destination information to the header of the ATM cell, the AT
The MSW 10 is configured to self-route an ATM cell to a functional block serving as an information destination by a logical path based on header information. The assignment of destination information in each functional block is performed by providing a table in which destination information is stored in advance in each functional block, as disclosed in Japanese Patent Application Laid-Open No. 3-218142, and when a signal to be transmitted is input. The destination information is added to the header by referring to the table. The contents of each table are set from the management and maintenance device in the system or an appropriate management device (not shown) when the GW 1 is installed or the configuration is changed.

Hereinafter, the configuration and operation of the multimedia signal processing apparatus and the communication network control system of the present invention will be described in detail with reference to the drawings so as to further clarify the features of the communication network control system of the present invention.

FIG. 5 is an example of a block diagram of a multimedia signal processing device (MSP) 70 of the present invention.

In the present invention, M used in GW1
SP70, as shown in FIG.
10 and ATM interface (ATMIF) 710-
It is connected to an ATM switch (ATMSW) 720 of the MSP 70 via 1-710-i. ATMIF7
10-1 to 10-i rewrite the input ATM cell to a header addressed to a predetermined device or add such a header and output. The SPU 750 is provided with a plurality of types or a plurality of types, and performs signal processing corresponding to various media on the input ATM cell. CSIG730 is SP
It sends and receives control signals related to the signal processing of U750. AT
MSW720 may have a smaller capacity than ATMSW10,
It is also possible to use a bus or a loop. The ATMSW 720 includes ATMIFs 710-1 to 710-710.
-I, a control signal processing device (CSIG) 730, a signal processing unit (SPU) 750, and the like are connected. CSI
A processor (CPU) 740 is connected to G730. The CPU 740 analyzes the control signal received by the CSIG 730, sets a path table based on the control signal, and controls the entire MSP 70.

Next, the SPU 750 will be described.
As an example, a hardware configuration is shown in SPU750-1 of FIG. SPU750-1 to SPU750-m receive the input ATM.
AAL cladding (AALC) to disassemble (decelerate) cells
LAD) 7000, a signal conversion unit 7200 for converting signals of various media, and an AAL clad (AALCLAD) 7100 for reassembling (cellifying) the signal processing result into cells. AALCLAD7000 and 7100 are AAL
Can be freely selected according to the purpose.
The signal conversion unit 7200 includes a digital signal processor (DSP) 7010 and a memory (MEM) 7020. Signal processing for each medium such as voice, image, and data is executed by the firmware of the DSP 7010. Therefore, since the specific processing content for each medium can be easily changed by changing the firmware of the DSP 7010, the system is highly expandable. All processing such as voice coding can be performed by the on-chip memory of the DSP 7010. However, when a large amount of memory is required for retransmission processing such as a packet, the signal conversion unit 7200 is provided with an MEM 70 as an external memory.
By providing 20, each process can be executed. The MEM 7020 can also be used as a queuing buffer.

Next, a functional block diagram of the SPU 750 is shown in SPU 750-m. Here, the signal conversion unit 7200 will be particularly described. AALCLAD7000
The user data separated into cells by −m is supplied to a decoder (DE
C) Allocated to various appropriate signal processing units by 7210. Here, as an example, the signal processing unit includes an audio signal processing unit 7230, an image signal processing unit 7240, and a data signal processing unit 7250, and can include a plurality of signal processing units. In addition to the above, the signal processing unit may be provided with appropriate components such as media conversion, encryption / decryption, encoding / decoding, compression / expansion, and the like. The signal processing result is selected by a selector (SEL) 7220, and AALCLAD
The cell is assembled by 7100-m and output.

FIG. 6 is an explanatory diagram showing the types of signal processing units and the outline of processing. As shown in the figure, the media include, for example, voice, N-ISDN, packet, PIAF
S (PHS Internet Access Forum Standard), synchronous / asynchronous conversion PPP (Point-to-Point Protocol), FA
X, a modem, an image, and the like. In this figure,
An example of the processing outline is shown for each of these media.

Here, "concealment" is a process such as encryption which is not yet determined in detail at present, but is expected to be put to practical use in the future, and a specific algorithm is established. If it is, it is implemented by the algorithm of the DSP. In addition, the following is performed as the “end of FCL (Frame Control Layer)”. That is, on the transmission side (downlink), channel information and the like required by the service are added to the data received from the upper layer as an FCL header, and the data is transmitted at transmission intervals according to the service. On the receiving side (uplink), the data is received at a reception interval according to the service, and after referring to the required information of the radio section and the channel information, the FCL header is removed,
Transmit data to upper layer. For audio, for example,
The configuration is such that the speech coding rate can be changed using the information of the wireless section, and a compensation process when the reception data is lost is also performed.

FIGS. 7 and 8 are explanatory diagrams (1) and (2) of the protocol stack in the signal processing unit. FIG. 7 shows voice, N-ISDN, packets, and images, and FIG. 8 shows PIAFS, modem, PPP, and FAX. In these figures, U-plane
And C-plane (protocol stack of control information accompanying user information) are shown, and the left side of each list represents the access side, and the right side represents the fixed side.

FIG. 9 shows an example of a configuration diagram of AALCLAD. The details of AALCLAD7000 and 7100 are described in, for example, Japanese Patent Application No. 11-51829. In FIG. 9, the AALCLAD 7000 on the input side includes a header analysis unit 241, a memory 242, and a memory control unit 244 so that the header generation unit 2
This can be realized by a configuration in which 43 is omitted or omitted. On the other hand, the output side AALCLAD 7100 includes a header generation unit 243, a memory 242, and a memory control unit 244 so that the header analysis unit 24
It can be realized by a configuration in which 1 is a through or omitted. Further, as the memory 242, AALCL
The signal conversion unit 7 is not provided in the AD7000 or 7100.
The MEM 7020 in 200 can also be used.

In the AALCLAD 7000 on the input side, AA
When a cell of the structured transfer method in the L type 1 is input, data of the payload portion is stored in the memory 242 in units of blocks handled by the structured transfer method. The data stored in the memory 242 is read by the signal conversion unit 7200 (through the header generation unit 243), and signal processing and signal conversion of various media are executed. On the other hand, for AAL type 1 cells, the outgoing AALCLAD 710
0, the data processed by the signal conversion unit 7200 is stored in the memory 24 (through the header analysis unit 241).
2 is stored. The data stored in the memory 242 is
The header generating unit 243 reads out the generated ATM cells according to the switching structure of each channel, thereby generating the ATM cells whose channels are switched.

In the AALCLAD 7000 on the input side, when an AAL type 2 cell is input, similarly, each CPS packet is stored in the memory 242 for each channel by the header analyzer 241 and the signal converter 720
By 0, signal processing and signal conversion of various media are executed. On the other hand, for AAL type 2 cells, the outgoing A
In ALCLAD 7100, data from signal conversion unit 7200 is stored in memory 242, and header generation unit 243
Accordingly, by reading out the CPS packet from the memory 242 in accordance with the structure to be replaced, the ATM cell in which the CPS packet is replaced can be generated.

Next, the header analyzer 241 will be described in detail. The ATM cell header of the ATM cell input to the AAL switch is analyzed by the header analysis unit 241. AA
The L-type 1 cell detects a break of a structured block based on offset information transferred only once in eight cells for one ATM connection, and stores the data in the memory 242 in block units. The size of the block is
For example, it is obtained by being transferred by a control signal between stations or being set as station data. The block size is stored in a table in the header analysis unit 241 for each received ATM connection. In addition, the header analysis unit 241 performs a process of checking a received ATM cell sequence number and processing of offset information. Since these processes are performed on a per ATM connection basis, there is a table for managing each received ATM connection for these processes.

On the other hand, in the AAL type 2 cell, an offset is indicated in the start field of the first byte of the ATM payload.
This indicates that the beginning of the packet exists. That is, the data of the CPS packet that could not be accommodated in the ATM cell immediately before the same ATM connection is filled up to immediately before the head position. Therefore, the data immediately before the offset is indicated by the immediately preceding CP
The data is stored in the memory 242 so as to be connected to the S packet.
Since this process is also performed for each ATM connection, the ATM
Information such as the channel information of the last CPS packet in the cell and the number of remaining bytes of the CPS packet carried over to the next ATM cell is managed by a table for each received ATM connection.

In the memory 242, as described above, the AAL
In the type 1 structured transfer method, data is managed for each block, and in the AAL type 2, data is managed for each channel of a CPS packet, and the memory control unit 244 controls the data. By the read control of the memory control unit 244, AA
Replacement of channels in L type 1 and AAL type 2
The CPS packets can be exchanged in the above.

The header generation unit 243 generates an ATM cell header or a SAR-PDU (Segmentati
on and Reassembly-Protocol Data Unit)
Performs pointer field generation, etc., and uses AAL type 2
Then, a start field and a CPS packet header are generated. The pointer field in the AAL type 1 is inserted only once in eight cells in one ATM connection, but the insertion cycle is not fixed. When the pointer field is inserted, the AAL user information portion is reduced by one byte as compared with the case where the pointer field is not inserted. Therefore, the information is fed back to the memory control unit 244, and when the pointer field is inserted, 46 bytes of data are stored as one cell. Is read.
The header generation unit 243 performs these processes by managing data in a table for each ATM connection and for each CPS packet channel as in the other parts.

FIG. 10 shows a configuration diagram of the memory control unit 244. The memory control unit 244, as described above,
2 is a part for controlling the writing and reading of data to and from the memory 2. In the case of the AAL type 1 structured transfer method, the writing control unit 5 controls to store the data in each structured block, and in the case of the AAL type 2, the CPS packet is stored in each channel.

Read AAL type 1 cell or AAL
The type 2 cell may be read out by a method by the CPU 740, a method of instructing the readout schedule by setting from the control unit of the communication network control system, a method of giving a readout instruction according to the amount of data in the memory 242, or the like. is there.
This control is performed by the AAL type 1/2 selection control unit 9,
A signal for controlling the memory 242 from the side where the reading is selected is transferred to the memory 242 after passing through the selector 6.

AAL type 1 read control unit 7, AAL
The type 2 read control unit 8 monitors the amount of data in the memory 242 by comparing the signal from the header analysis unit 241 with the read state of the data from the memory 242. The AAL type 1 monitors whether one block is stored, and the AAL type 2 monitors whether one CPS packet is stored. In AAL type 2, when one packet is generated from a plurality of CPS packets and the packet is processed in units of packets, it is monitored whether or not one packet is accumulated.
AALCLAD 7000 and 7100 are also A
Depending on the type of AL, it can be appropriately handled.

In the following, referring again to FIG.
Will be described.

First, the initialization operation of the MSP 70 is performed simultaneously with the initialization of the main body when the GW 1 of the present invention is started or set. By this operation,
After initialization of GW1, SIG50 and MSP70
CSIGs 730 communicate with each other, and the path table in the MSP 70 is determined by the CPU 740. Specifically, when any of the ATMIFs 710-1 to 710-n is selected, which of the SPUs 750-1 to 750-m is selected, and which of the signal processing units is activated is determined. Therefore, during operation, the path in the MSP 70 is fixed, but it is possible to change the path setting as required, for example, according to time zone, day / night, day of the week, and the like.

Next, the operation of MSP 70 will be described on the assumption that a call has been set up. Here, as an example, a case where a call is originated from a terminal CS of the mobile communication network 101 and voice information arrives at a terminal of the STM communication network 104 will be described. For connection of a call, the mobile communication network 101 and the ST
Switching system (NS) connected to M communication network 104
2, a call connection control is performed, and as a result, a call is set up between both communication networks, and an appropriate interface (for example,
A communication path is connected via the ATMIFs 20-1 and 20-i) and the MSP 70. Here, in the terminal CS in the mobile communication network 101, the voice information is ETSI (European T
GS, a speech encoding defined by the European Telecommunications Standards Institute
M-AMR (Global System for Mobile communications)
-AMR) and transmit it after encoding at 12.2 kbit / s. On the other hand, 64 kbit / s on the called side
Since communication is performed by PCM, code conversion is required.

The data input to the MSP 70 is an ATM cell including a header and information (here, encoded voice). It is also assumed that the type of AAL is type 2. In the MSP 70, a specific ATMIF 710-1 to 710-n (here, AT
M710-1) is selected. In the ATMIF 710-1, the header of the ATM cell 1200 is rewritten, and SPU750-1 to 750-m (here, SPU7
50-m). AAL for SPU750-m
The CLAD 7000-m operates as an AAL2 cladding as described above, decomposes ATM cells, and extracts voice information. The audio information is input to the decoder 7210, the audio signal processing unit 7230 is selected, and is transferred there. In the audio signal processing unit 7230, the encoded audio data of 12.2 kbit / s is decoded in accordance with the GSM-AMR algorithm according to the protocol stack shown in the above-described figure, and is decoded according to the ITU-T standard. 711 64 kbit / s PCM data. The converted data is selected by the selector 7220 and AA
The STM that is the called side by the LCLAD7100-m
Assembled into AAL type 1 ATM cells suitable for communication networks. Therefore, AALCLAD7100-m is:
Here, it operates as an AAL1 clad. ATM
The data assembled in the cell is ATMIF710-1.
The header is rewritten to the appropriate destination by ATMS
Transferred to W10.

The above is a description of a flow of a series of processing relating to voice data originating from a terminal of the mobile communication network and arriving at the terminal of the STM communication network. Needless to say, the flow of audio data to the terminal is the reverse process described above. Also, in the case of media other than audio, for example, an image, there is a great difference in that the image signal processing unit 7240 is selected in the signal conversion unit 7200, and the conversion process is performed according to the image protocol stack. Is similar.

For data such as modems and faxes, FIG.
And the protocol stack shown in FIG. 8,
A protocol stack for control information exists, and communication is completed by performing negotiation between terminals. In the case of packet data, the AAL type on the fixed network side is 5, and the AALCLAD 7100 operates as an AAL5 clad. Thus, the SPU750 of the present invention
The AALCLADs 7000 and 7100 mounted on the AAL are characterized in that they can flexibly cope with the AAL type as described above (see Japanese Patent Application No. 11-51829).

Although the path is fixedly set in the MSP 70 of the present invention, efficient processing is possible according to the amount of traffic of each medium. This is the ATMS in FIG.
As indicated by the dotted line in W720, a plurality of SPU750-1
To m, the operation state of each SPU is monitored by a monitoring control device (monitoring CNT, not shown), and if there is a signal processing unit of the same medium that is not operating, a path is established there. This can be achieved by doing so.

On the other hand, the resource allocation of the MSP 70 (the number of channels for audio, video, data, etc.) is usually defined as station data and is actually set at the time of system initialization or setting, but in principle Can be changed dynamically. The MSP 70 has a plurality of SPU750-1s.
To m, but for dynamic change, for example, these operating conditions are constantly monitored by a monitoring control device (monitoring CNT, not shown), and the SPU 7 not used is
For any of 50-1 to 50-m, the number of channels of each medium may be changed by a command from a resource management device (not shown). The function of the signal processing unit is DSP7
Since this is realized by firmware 010, the resource allocation can be easily changed. Also,
It is also possible to forcibly put a specific SPU into a blocked state and change resource allocation.

Further, the MSP of the present invention can provide various services in terms of services. For example, basically, a real-time service such as a facsimile can also be used. in this case,
On the output side, IP data transmitted with best effort may be used. Although a signal processing unit corresponding to each medium is shown in the functional block diagram shown in SPU750-m in FIG. 5, since the actual signal conversion processing is executed by the firmware of the DSP 7010, the above-described media conversion is also performed. Can be easily realized.

The data transfer path in the MSP 70 can be set so that the load is distributed by monitoring the operation status of the code conversion processing in the signal processing unit 750.

Hereinafter, the configuration and operation of the communication network control system of the present invention will be described in detail with reference to the drawings so as to further clarify the features of the GW of the present invention.

First, the initial setting operation of the MSP 70 will be described. FIG. 11 is an explanatory diagram of a setting operation with the MSP by the communication network control system of the present invention. This figure shows, as an example, control of the line number with the MSP in the communication network control system GW1-1 and other system settings when the communication network control system 1-1 starts up. The numbers in parentheses in the figure correspond to the numbers in the following description. (1) RMP64 for managing resources of the entire GW1-1 when the communication network control system GW1-1 is started up
0 indicates to the MSP 70, which is the connection destination, the Initial Sequential to instruct the MSP of the line number and other setting items with the MSP.
Send a tup message. At this time, in the illustrated communication network control system, the RMP 640 has a function of performing signal processing on the MSP signal for the Initial Setup message.
0 (SIG50-5 in this example) as a destination, an ATM cell 1100 having a header added thereto, and an ATMSW 10
Output to (2) When receiving the ATM cell 1100, the SIG 50-5 converts the control signal according to the procedure of the protocol stack, and converts the control signal into the ATM 1000. The destination of this cell is the MSP in the same communication network control system GW1-1.
70, a header with MSP 70 is added, and AT
Output to MSW10. (3) In the MSP 70, the A received from the ATMSW 10
Based on the TM cell 1000, the Initial Setup message is converted into a prescribed signal format and the setting contents are set. (4) The MSP 70 creates a Setup Complete message, which is a response signal to the Initial Setup message, converts this message into an ATM cell 1000, and converts the message to an ATMSW1.
Output to 0. The destination of this cell is SIG50-5.
Therefore, the corresponding header is added and output to the ATMSW 10. (5) Upon receiving the ATM cell 1000, the SIG 50-5 initializes the Initial Comple
When the te message is converted, RMP is added to the converted signal.
ATM cell 110 with a header addressed to 640
0 is created and output to the ATMSW 10. (6) The RMP 640 transmits the Initia from the ATM cell 1100 to the Initia
l Extract the Complete message and continue the startup process in conjunction with each processor.

Next, call connection control will be described.

FIG. 12 is an operation explanatory diagram for call connection control (when a call is originated from a mobile network) by the communication network control system of the present invention. As an example, this diagram shows a case where a call is made from a terminal CS of the mobile network 101 to a switching system NS2 connected to the STM communication network 104 (in this example, the ATM communication network 100 (2)). 2 illustrates call connection control of the network control system. The numbers in parentheses in the figure correspond to the numbers in the following description. (1) First, the mobile communication network 101 to the ATM communication network 10
0 (2), a control signal requesting a call, for example, SET
The signaling ATM cell storing the UP message is transmitted. When the ATMIF 20-1 receives this control signal, the ATMIF 20-1 stores the header of the ATM cell in the mobile communication network 101-.
D for selectively combining signals from a plurality of base stations BS
The ATM cell 1000 is rewritten into a header addressed to H30, and the rewritten ATM cell 1000 is output to the ATMSW 10. (2) The ATMSW 10 transfers the input ATM cell to the DH 30 (in this example,
DH30-1. ). (3) The DH 30-1 converts the ATM cell 1000 according to a predetermined protocol, and multiplexes / demultiplexes the ATM cell 1200 for transmission and reception of signals and data on the wireless interface of the mobile communication networks 101-1 and 10-2. MUX that performs format conversion according to the transmission interface
40 (in this example, MUX 40-1), and outputs it to the ATMSW 10. (4) The ATMSW 10 divides the cell 1200 in the path P2 into a predetermined MU based on the information of the added header.
Transfer to X40-1. (5) The MUX 40-1 performs multiplexing / demultiplexing on the ATM cell 1200 for transmission and reception of signals and data on the radio interface of the mobile communication networks 101-1 and 101-2, and format conversion according to the transmission interface, and performs ATM conversion.
As the cell 1200, SIG50 (in this example, SIG5
0-1) Destination information to the destination is added and output to the ATMSW 10. (6) The ATMSW 10 transfers the ATM cell 1200 to the predetermined selected SIG 50-1 via the path P3 based on the information of the added header. (7) The selected SIG 50-1 is the ATM cell 120
0 is converted by a predetermined protocol, and ATM cell 1 is converted.
A processor that processes a control signal as 100 (in this example, a connection request, so any of CLPs 630-1 to CLP630-k)
Add a header to the address and output. (8) This ATM cell 1100 is the CLP 630 selected in the path P4 of the ATM SW 10 (in this example, CLP 630).
630-1). In addition, a plurality of CLP630
Any one of −1 to k is configured to be executed based on the instruction of RMP640. (9) CLP 630-1 receiving ATM cell 1100
Extracts the SETUP message from the ATM cell 1100, performs call processing in cooperation with each processor,
Create a PROC message to respond to the UP,
ATM cell 11 with a header addressed to 50-1
00 and output to the ATMSW 10. The call connection control based on the interlocking operation between a plurality of processors can use, for example, the control described in Japanese Patent Application No. 11-47595. (10) When the SIG 50-1 receives the ATM cell 1100, the communication processor 510 performs the reverse procedure of (7),
An ATM cell 1000 storing a PROC message addressed to the ATMIF 20-1 is created, and the ATMSW 10
Output to (11) ATMSW10 is 100 for the input ATM.
0 is transferred to the ATM-IF 20-1 based on the information of the header. (12) The ATMIF 20-1 transmits the response signal PRO.
When the ATM 1000 storing the C message is received,
The data is converted into a signaling ATM cell rewritten into a header addressed to the mobile communication network and output to the mobile communication network 101.

Next, call connection will be described.

FIG. 13 is a diagram for explaining the connection operation with the MSP by the communication network control system of the present invention. Regarding the call connection, for example, as a result of executing the call connection control between the mobile communication network 101 and the switching system (NS) 2 connected to the STM communication network 104 inside the GW 1 by the above-described procedure, for example, , The following paths are connected. That is, the path to the MSP 70 via the ATMIF 20-1 and the ATMSW 10 and the mobile communication network 101, and
Switching system NS connected to STM communication network 104
2 (in this example, the ATM communication network 100 (2))
MSP70 via TMIF20-i, ATMSW10
Are connected, and a call is set up between the two communication networks. The MSP 70 appropriately performs processing of information between users, signal processing, and the like, and performs communication between terminals of both communication networks.

[0077]

According to the present invention, integration or interconnection of existing communication networks can be realized as described above. Further, according to the present invention, a multimedia signal processing apparatus and a communication network control system suitable for configuring a communication network for realizing integration or interconnection of existing communication networks and a control method therefor are provided by a simple configuration and procedure. Can be provided.

According to the present invention, for example, while existing communication networks are left as they are, each existing communication network is connected so as to make full use of the communication capabilities and services provided originally by the communication network. Performs necessary signal conversion, exchange or control processing to implement interconnection and communication service provision, and provides information from the terminals of each existing communication network to the desired destination and to the desired destination using the desired medium To provide a multimedia signal processing device, a communication network control system, and a control method therefor with a simple configuration and a simple procedure.

Further, according to the present invention, the GW realizes a communication service for interworking with heterogeneous networks such as an STM communication network, an ATM communication network, and the Internet.
There is no need to be aware of the control method specific to the opposing network,
It is possible to provide a multimedia signal processing device, a communication network control system, and a control method thereof, which need only be aware of a control method as a single interface device.

Further, according to the present invention, as a GW for interconnecting a plurality of types of communication networks by processing these signals at high speed and surely, various and huge control signals are processed and converted to control the GW. A multimedia signal processing device and a communication network control system and a method of arranging the same, which enable the mechanism to execute control such as call connection control and communication processing control between communication networks at a high speed and reliably without deteriorating the performance of the existing communication network; A control method can be provided. Moreover, according to the present invention, it is also possible to provide a multimedia signal processing device and a communication network control system that can cope with various signal processings with a simple configuration that can be easily expanded and changed, and an arrangement method and a control method thereof.

According to the present invention, in order to realize a GW suitable for handling multimedia, a procedure for exchanging control signals with various networks and a signal exchanged in this procedure are processed. Signal processing device that communicates with each processor, and various signals that are transmitted and received between various networks
It is possible to provide an interface device or the like that converts the data into a unified format in W. Further, according to the present invention, the GWs and the communication network, the signal exchange method and the communication network of the versatile and easy-to-extend and change easily connectable and can be interconnected with various communication networks. A control method can be provided.

According to the present invention, it is possible to easily add or change each block of a signal processing device or the like, or to add a new communication network interface, etc., and a plurality of types of communication having excellent versatility and flexibility. A GW for interconnecting networks can be easily provided.

According to the present invention, each functional block such as a signal processing device simply attaches destination information of a functional block to which a signal is to be transmitted to the header of an ATM cell and transmits it as a cell. The ATM cell can be self-routed based on the information of the header and transferred between the destination functional blocks, and the control processing of the switching system can be performed for each functional block.

According to the present invention, A
By performing the TM cell transfer, the control signal does not concentrate on one device (functional block), a bottleneck does not occur in the communication path of the control signal, and congestion and cell loss hardly occur. Therefore, it is possible to easily provide a GW suitable for performing high-speed and reliable connection between various communication networks.

According to the present invention, in particular, W-CDMA
For example, it is necessary to be able to communicate signals of various types and speeds such as voice, images, and high-speed data with high reliability and economical efficiency. Multimedia signal processing that performs necessary code conversion / encryption processing and matching with existing communication network signal formats in order to guarantee interconnection between communication networks or between mobile communication networks and heterogeneous communication networks. An apparatus and a communication network control system can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a communication network using a communication network control system of the present invention.

FIG. 2 is a block diagram schematically showing a communication network control system according to the present invention.

FIG. 3 is a block diagram schematically showing an exchange system.

FIG. 4 is a block diagram showing a detailed configuration of a communication network control system according to the present invention.

FIG. 5 is a multimedia signal processing apparatus (MS) of the present invention.
P) The block diagram of 70.

FIG. 6 is a diagram illustrating types of signal processing units and an outline of processing.

FIG. 7 is an explanatory diagram (1) of a protocol stack in the signal processing unit.

FIG. 8 is an explanatory diagram (2) of a protocol stack in the signal processing unit.

FIG. 9 is a configuration diagram of AALCLAD.

FIG. 10 is a configuration diagram of a memory control unit 244.

FIG. 11 is an explanatory diagram of a setting operation with the MSP by the communication network control system of the present invention.

FIG. 12 is an operation explanatory diagram of call connection control (when a call is originated from a mobile network) by the communication network control system of the present invention.

FIG. 13 is an explanatory diagram of the connection operation with the MSP by the communication network control system of the present invention.

[Explanation of symbols]

1 communication network control system (GW), 2 switching system (NS) 10 ATM switch, 20 ATM communication network interface, 25 IP communication network interface,
40 Demultiplexer (MUX) 30 Diversity handover processor (D
H), 50 signal processing units (SIG), 60 control units, 70 multimedia signal processing units (MSP),
80 trunk device (TRK), 100 multimedia communication network, 101 mobile communication network, 1
02 ATM communication network, 103 IP communication network,
104 mobile communication network, 106 communication terminal,
BS base station, CS mobile terminal 710 ATM interface (ATMIF), 72
0 ATM switch (ATMSW) or bus, 730
Control signal processing unit (CSIG), 750 signal processing unit (SPU), 740 processor (CPU), 7
000, 7100 AAL CLA
D), 7200 signal converter, 7010 digital signal processor (DSP), 7020 memory (ME
M), 7210 decoder (DEC), 7230 audio signal processing unit, 7240 image signal processing unit, 7250
Data signal processing unit,

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Katsumi Okuma, 216 Totsukacho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Information and Communication Business Department, Hitachi, Ltd. (72) Yoichi Kitamura 216 Totsukacho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term in Hitachi, Ltd. Information and Communications Division (Reference) 5K030 GA04 GA11 HA10 HB11 HB21 HB29 HC09 HD03 JA01 JA06 JA07 KA01 KA13 KX11 LA11 LA18 LB13 5K033 AA04 AA09 BA15 CB02 CC01 DA05 DA19 DB14

Claims (4)

[Claims] 1. An asynchronous transfer mode cell (AT)
M cell) is rewritten or added to a predetermined header addressed to the device, and an ATM interface is provided for output. A plurality or a plurality of types of ATM cells are provided. A signal processing unit for performing processing; a control signal processing device for transmitting and receiving a control signal related to processing by the signal processing unit; and a switching unit for receiving and switching the ATM interface, the signal processing unit, and the control signal processing device. Based on the control signal received by the control signal processing device, the signal processing unit by the switching unit and the A
A multimedia signal processing device comprising: a processor that controls connection with a TM interface. 2. A signal processing unit, comprising: a first AAL clad for decomposing an ATM cell input to an AAL according to an AAL (ATM Adaptation Layer) type corresponding to a medium to be communicated; A signal converter for converting signals of various media such as voice, image, data, etc. from the AAL cladding, and processing results by the signal converter for ATM cells corresponding to the type of AAL corresponding to the medium to be communicated. 2. The multimedia signal processing apparatus according to claim 1, further comprising a second AAL clad to be assembled. 3. The signal conversion unit according to claim 2, wherein the signal conversion unit includes at least one of an audio signal processing unit, an image signal processing unit, a data signal processing unit, and a media conversion unit. Multimedia signal processing device. 4. A communication network control system comprising the multimedia signal processing device according to claim 1, wherein the communication network control system performs control for connecting a plurality of types of communication networks and transferring information. A plurality of types of interfaces for converting signals from a plurality of types of connected devices into cells (ATM cells) in an asynchronous transfer mode; and a plurality of diversity handover processing devices for performing processing related to diversity and handover of wireless terminals. A plurality of demultiplexing devices for demultiplexing a control signal and information between users for each function; and a plurality of input lines and output lines, the multimedia signal processing device, the interface, the diversity handover processing device, Housing the demultiplexer,
A received on one of the input lines from the interface
A communication network control system comprising: an ATM switch for transferring a TM cell to any one of a plurality of output lines based on header information of the ATM cell.