JPS6148256A - Processor of isdn subscriber line signal - Google Patents

Abstract

PURPOSE:To miniaturize a processor and to apply it to a terminal device in common to different kinds of devices by adopting a multiplexed hierarchy for the processing section. CONSTITUTION:A signal processor 1 is subject to hierarchy structure in its inside into signal processing sections 2 and 3, which share subscriber signal device procedures. The signal processing 2 applies m-multiplex to a D channel at each subscriber via a multiplexer 7 and becomes a logical termination to each channel. Since the signal processing section 2 is of n-multiple constitution in the entire processor, (m)X(n)-set of D channels are processed multiplexingly.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is based on ■ CCITT, I series recommendations that specify SDN user/network interfaces (References, edited by the Japan ITU Association, ■ SDN Seminar Materials 858, 11) This paper relates to a processing method for ISDN subscriber line signals in accordance with Articles (5) Introduction to ISDN and (7) User network interface).

(Prior art) Conventionally, as a technology in this field, for example, DIO type automatic exchange published by Telecommunications Mutual Aid Association and edited by Nippon Telegraph and Telephone Public Corporation [
I] Hardware As described in ``Hardware'', exchange control information is exchanged between the subscriber and the network in a conventional telephone exchange.
Information was exchanged using binary methods, such as whether the B line was looped or open, and conversely, information was exchanged from the exchange to the subscriber using binary values depending on the directionality of the current supplied from the exchange.

The control circuit for sending and receiving the information is a line scanning circuit;
The plan was to achieve economy through large-scale multiplexed centralized processing for, for example, 1024 subscribers, such as trunk scanning circuits and signal distribution devices. However, when subscriber line signals are signaled using a signaling system that complies with the CCITT I series recommendations, there is an End-t connection between each subscriber and the exchange, such as voice communication.

-In addition to the information link called B channel for End d information, there is also a signal data link channel (mainly used for transmitting exchange control information between the subscriber and the exchange).
This channel is called LAP-D, and is a system in which packetized information is exchanged using sophisticated procedures. The exchanged information is then sent to the higher-level device through a procedure with the higher-level device using a convention called a primitive.

In the case of transmission of exchange control information such as making a call, the information exchanged in the above procedure becomes exchange control information, and the content of the information is interpreted by the higher-level device that performs the transmission and reception, and the higher-level device performs the exchange operation. will be carried out. This procedure is also used when transmitting and receiving end-to-end packet information on the signal differential link, and the host device in this case is a packet exchange processing device.

(Problems to be Solved by the Invention) In other words, an ISDN subscriber line signal processing device that supports this signaling system requires a circuit that connects each subscriber to this signal data link and processes it according to LAPD. However, some advanced procedures may need to be supported.
It had the disadvantage that it became very large for exchanges that accommodated a large number of subscribers.

(Means for Solving the Problems) In order to solve these problems, the present invention provides a hierarchical structure in which the signal processing device in an exchange accommodating a large number of subscribers has multiplexed processing units. L
This makes it possible to apply it to SI, etc.

(Function) This ISDN subscriber line signaling device has a hierarchical structure internally consisting of a signal processing section and a processing section, which are responsible for the above-mentioned subscriber line signaling procedure. Further, a signal processing interface that interfaces with this signal processing device and an ieket exchange processing device interface section that interfaces with the Nogukerato exchange processing device are provided, and a transmission path is provided as a common transmission path for each of these sections. .

The signal processing section multiplexes m D channels for each subscriber via a multiplexer and outputs them, and serves as a logical terminal of this channel. This signal processing section has a structure in which n signal processing sections are multiplexed in the entire ISDN subscriber line signal processing device, and as a result, mXn D channels are multiplexed.

Embodiments of the present invention will be described in detail below with reference to the drawings.

(Embodiment) FIG. 1 is a block diagram of an ISDN subscriber line signal processing apparatus (ISE) 1 which is an embodiment of the present invention.

This signal processing device (ISE) 1 has an internal signal processing section (
It has a hierarchical structure of SIG) 2 and processing section 3, and is responsible for the above-mentioned subscriber line signaling equipment procedures.

Further, this signal processing device (ISE) I is provided with a signal processing interface section 4 that interfaces with the signal processing device (ISE) 1, and a nofket exchange processing device interface section 5 that interfaces with the Gkerato exchange processing device, Furthermore, a transmission bus 6 is provided as a common transmission path for these parts.

A signal processing unit (SIG) 2 multiplexes m D channels for each subscriber via a multiplexer (MUX) 7 and sends them to a logical terminal.

This signal processing section (SIG) '2 is a signal processing device (IS).
E) A total of n channels are multiplexed, and as a result, m×n D channels are multiplexed.

In this signaling system LAP-D, information transmitted on the D channel is sandwiched between two flags indicating start and end, and is broken down into the following four fields. Tsumashi address field.

These are a control field, an information field, and a frame check sequence (Fe2). The address field is the subscriber or terminal (D-T'
EL) identification information is shown, and the control field shows information showing the format of the frame being sent and received, as well as information showing the regularity and order of the frame. By checking this content, it is possible to check the normality of the procedure. gender is confirmed. Information field is signal processing equipment (ISE) 1
This information is sent to and received from the higher-level device, and this content is not supported within the signal processing device (ISE) J, and a large amount of information is sent and received with the higher-level device by exchanging zolimitatives.

Frame check sequence (Fe2) is a method for detecting bit errors in transmitted and received data.
) By generating 4 turns and performing calculations including frame check sequence (Fe2) on the receiving side,
Confirm normality by obtaining a constant residual result. Among these processes, the logical interface conditions for primitives with higher-level devices are not specified in detail, and CC
ITT specifies only the concept, and detailed interface conditions are determined depending on the various systems. In Figure 1, the signal processing unit (SIG) 2 is in charge of processing other than the processing related to this primitive, and the processing unit 3 and each interface unit are responsible for processing related to the primitive and traffic control between each signal processing unit. Responsible for processing that depends on the overall system of the signal processing device.

FIG. 2 shows a specific example of the configuration of the signal processing section (SIG) 2 in FIG. In FIG. 2, the reception calculation circuit 10.
and the transmission arithmetic circuit 11 generates flags for information to be transmitted and received;
This is a circuit for generating and extracting frame components through detection, and generating and checking a frame check sequence (Fe2)/cutan. Frame information to be input/output to this arithmetic circuit is temporarily stored in a reception buffer 12 and a transmission buffer 13.

Analysis of the fields within the frame information and confirmation of the normality of the procedure are performed by a microprocessor 14 provided within the signal processing unit (SIG) 2. Activation of these processes and transmission and reception of information are performed via an interface circuit 15 under the control of a processing section outside the signal processing section (SIG) 2.

(Effects of the Invention) As described above, since the processing sections of the ISDN subscriber line signal processing device are multiplexed, miniaturization due to the multiplexing effect can be expected. Furthermore, by layering the configuration into parts that depend on the signaling method and parts that depend on the system configuration, the parts that depend on the system can be shared as a common technology between different types of systems, and can be integrated into LSI etc. The configuration is applicable to

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an ISDN subscriber line signal processing apparatus according to the present invention, and FIG. 2 is a diagram showing a specific example of the signal processing section of FIG. 1. 1... Signal processing device (ISE), 2... Signal processing section (SIG), 3... Processing section, 4... Signal processing device interface section, 5... Packet switching processing device interface section, 6...Transmission path, 7...Multiplexing device (
■■), D-place...Dinotal terminal, 10...Reception calculation circuit, 11...Transmission calculation circuit, 12...Reception buffer, 13...Transmission buffer, 14...Microprocessor, 15... Ink face circuit. Patent Applicant Oki Electric Industry Co., Ltd. 1 Case Indication 1982 Patent Application No. 169952 2 Name of the Invention ISDN Subscriber Line Signal Processing Device 3, Person Who Makes Amendment Relationship with the Case Patent Application Office ( 105) 1-7-12-4 Toranomon, Minato-ku, Tokyo
Agent address (105) 1-7-1 Toranomon, Minato-ku, Tokyo
No. 2 No. 6, Contents of the amendment As shown in the attached sheet 6, Contents of the amendment 1, 1'- on page 3, line 3 of the specification and page 6, line 6
Correct LAP-D J to r LAPD J. 2. In the same book, page 4, line 8, the word "common" is amended to read "in common." 3. On the 9th line of the same page, replace the text ``r with LSI, etc.''
``For LSI, etc.''

Claims (1)

[Claims] In an ISDN subscriber line signal processing device that operates according to a signal protocol of an ISDN user/network interface, the processing system of the signal processing device is multiplexed and supports parts depending on the method of the signal protocol. An ISDN subscriber line signal processing device characterized in that it has a layered structure including a part that supports a system configuration of a system including the signal processing device, and a part that supports a part that depends on the system configuration of a system including the signal processing device.