CN1492642A

CN1492642A - Method and device for establishing time-division multiplexing mode interconnection of multiple modules

Info

Publication number: CN1492642A
Application number: CNA021465274A
Authority: CN
Inventors: 杨国道; 肖世昌; 张宜; 童国凡
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2002-10-21
Filing date: 2002-10-21
Publication date: 2004-04-28
Anticipated expiration: 2022-10-21
Also published as: CN1314242C

Abstract

This invention discloses a method for realizing multimodule set up TDM mdoe interconnection and its device, connecting terminals of all interconnected devices by outward circuits, the other terminals of them are linked on a special time slot channel of CT bus, devices being connected are connected to time slot channels of CT bus occupied by related interconnect devices and arranging interfaces for devices being connected. The device includes a CT bus interface unit connecting with the CT bus and interface circuit, a central process unit connecting with CT bus interface and interface circuit and an interface circuit connecting with CT bus interface and the central process unit.

Description

A kind of multimode that realizes is set up the interconnected method and apparatus of time division multiplexing

Technical field

The present invention relates to the interconnection technique of intermodule, particularly set up the interconnected method and apparatus of Time Division Multiplexing pattern about a kind of multimode that realizes.

Background technology

At present, a lot of telecommunication apparatus need realize that the TDM between multimode connects, and these equipment or system often adopt a central switching network as the tie point between each module, connect with the TDM that sets up between the multimode.Here, a machine frame in common corresponding telecommunication apparatus of module.So-called TDM connects, and is a kind of mode by time division multiplexing transmission multichannel data.Not overlapping in time for the sample value that makes its each road, each data of its transmission are quantized in time, for each user, only connect active user's path in the official hour section, connect other user in At All Other Times.

Shown in the topological structure of Fig. 1, set up TDM for multimode in the prior art and connect signal.Entity 4 is central switching network, and entity 1,2 and 3 is module independently, sets up TDM with entity 4 respectively and is connected.Any communicating by letter and all need exchange to realize between the two in the entity 1,2 and 3 by entity 4.Therefore, the central switching network of this usefulness realizes that there is significant limitation in the structure that TDM connects, mainly show as following 2 points: first, the nucleus module that entity 4 can not be reduced as system, become the key point of system, break down as sporocarp 4, whole system will cause paralysis, greatly reduce the flexibility of system configuration; The second, because entity 4 will realize that arbitrarily setting up TDM between both or the many persons connects, so entity 4 implements more complicated, its cost is relatively also higher.

The CT bus is the bus form that a kind of timesharing commonly used at present transmits, and can finish the task of transmitting data in the promptly different time slots in the different time intervals.It has general standard interface, can articulate the interface equipment of standard, and being articulated on the CT bus is a kind of complete distributed version.

Summary of the invention

In view of this, the purpose of this invention is to provide a kind of multimode that realizes and set up the interconnected method of time division multiplexing, realize simply, and can effectively solve the influence of Single Point of Faliure system.

Another object of the present invention provides a kind of multimode that realizes and sets up the interconnected device of time division multiplexing, and its TDM that utilizes the CT bus to set up multimode is connected, thus the influence of avoiding Single Point of Faliure to bring effectively, and realization is convenient, with low cost.

A kind of multimode that realizes is set up the interconnected method of time division multiplexing, and this method is to realize like this.

For each comprises the module of an equipment to be connected at least an InterWorking Equipment is set, an end of all InterWorking Equipments is interconnected by external circuit, and the other end of each InterWorking Equipment is articulated in respectively on the assigned timeslot passage of CT bus;

When the equipment to be connected in the module connects, equipment to be connected is articulated to respectively on the shared CT bus time slot passage of the InterWorking Equipment of this module, dispose the interface of equipment to be connected in each module respectively, the shared CT bus time slot passage of InterWorking Equipment is set up mapping and is connected in the high-speed data-flow that makes its output and this module.

Described method comprises: preestablish the mapping relations between the CT bus time slot passage that the InterWorking Equipment of the high-speed data-flow of equipment to be connected output in each module and this module takies.

The bandwidth of all equipment outputs to be connected is smaller or equal to the output bandwidth of InterWorking Equipment in the described same module.

A kind of multimode that realizes is set up the interconnected device of time division multiplexing, and this device comprises:

The CT Bus Interface Unit is used to realize and being connected of CT bus that it links to each other with line interface circuit with the assigned timeslot passage of CT bus simultaneously;

CPU is used to control the CT Bus Interface Unit and realizes that the time slot passage is connected with the specific of external circuit upper signal channel on the CT bus, and it links to each other with line interface circuit with the CT Bus Interface Unit;

Line interface circuit is used for converting external circuit to high-speed data-flow, and it links to each other with CPU with the CT Bus Interface Unit.

Described CPU stores the configuration information that CT Bus Interface Unit and CT bus connect.

Described CT interface chip is an integrated circuit (IC) chip.

The time gas exchange ability that the present invention utilizes the CT bus itself to have, realize that TDM is interconnected between multimode, make the exchange between the module in twos relatively independent, so not only avoided the adverse effect of centrostigma to system safety, improved the reliability of system, and be easy in standard device, realize flexible configuration.In addition, the project organization of this kind module exchanging mechanism is simple, can reduce design complexities and its cost greatly.

Description of drawings

Fig. 1 is the topology diagram that TDM connects in the prior art;

Fig. 2 sets up the topology diagram that TDM connects for two of the present invention treat InterWorking Equipment;

Fig. 3 is the structural representation of InterWorking Equipment.

Embodiment

Core content of the present invention is to realize interconnected between multimode by the CT bus.Each module here all comprises equipment to be connected and InterWorking Equipment, and equipment to be connected typically refers to a veneer in the module, and InterWorking Equipment can be an independently veneer, also can be to realize by increase some modules in existing veneer.One end of all InterWorking Equipments all is articulated on the particular time-slot passage of CT bus, and the other end interconnects by external circuit.When two equipment to be connected need connect, should be connected on the CT bus by hanging equipment to be connected, by disposing the interface of this equipment, make on its high-speed data-flow of exporting certain bandwidth (HW, High way) and the CT bus in this module the shared time slot passage of InterWorking Equipment set up mapping and be connected.

Further specify specific embodiments of the present invention below in conjunction with the drawings and specific embodiments.

Fig. 2 is that two equipment to be connected are set up the schematic diagram that TDM connects.Two frame of broken lines among Fig. 2 are represented two modules respectively, be module 1 and module 2, comprise an equipment 201 to be connected in each module respectively, 204, and InterWorking Equipment 202,203, InterWorking Equipment 202, an end of 203 is connected on the assigned timeslot of CT bus, InterWorking Equipment 202,203 the other end has been set up fixedly connected by external circuit 205, this connection is represented with solid line, set the time slot 2 of InterWorking Equipment 202 and CT bus in the present embodiment, 3 link to each other, corresponding HW2, HW3, the time slot 5 of InterWorking Equipment 203 and CT bus, 6 link to each other corresponding HW5, HW6, equipment to be connected links to each other with the CT bus in a dynamic way, and this connection is represented by dotted lines.

When equipment 201 to be connected will be connected with equipment 204 to be connected, the HW that will make equipment to be connected 201 outputs and InterWorking Equipment 202 shared corresponding HW2, the HW3 of CT bus connect, and HW that equipment 204 to be connected exports and InterWorking Equipment 203 shared corresponding HW5, the HW6 of CT bus are connected.Because it is fixedly connected that InterWorking Equipment 202,203 has been set up by external circuit 205, therefore, equipment 201 to be connected and 204 can be interconnected.

Therefore, make equipment to be connected in two modules set up TDM and connect, some specific time slot passage of the CT bus that the equipment to be connected InterWorking Equipment corresponding with it take is connected, just can realize.

Fig. 3 is the schematic diagram of InterWorking Equipment typical structure.As shown in Figure 3, InterWorking Equipment comprises central processing unit CPU 303, line interface circuit 301 and CT Bus Interface Unit 302 etc. at least.The CT Bus Interface Unit adopts ripe chip usually, and the CT Bus Interface Unit in the present embodiment adopts the ML53812 chip.External circuit via line interface circuit 301 converts the HW signal to, and the HW signal inserts the local bus of CT Bus Interface Unit 302, and CT Bus Interface Unit 302 links to each other with CT bus 304.In addition, the configuration information of InterWorking Equipment in each module and CT bus solidifies in central processing unit CPU 303, these central processing unit CPU 303 control CT Bus Interface Chips 302, realization CT bus 304 upper signal channels and external circuit upper signal channel are set up specific annexation.

Therefore, the CT Bus Interface Chip is made customized configuration can realize that this equipment and the transmitting-receiving of CT bus channel concern, after two equipment to be connected that is articulated on the same CT bus suitably is provided with separately Bus Interface Chip, just can set up with other module between TDM be connected.This application is that the typical case of CT bus uses, and does not need to increase new module and equipment.And because InterWorking Equipment is netted connection, the arbitrary module in the CT bus can be set up and set up TDM with other modules and be connected.Equally, if will connect between the multimode in the CT bus, then can realize by simple module stack.

Certainly, in actual applications, also can set up dynamic annexation between InterWorking Equipment and the CT bus, select for use the time slot of the CT bus of current free time to connect, and notify the equipment to be connected in this module current connection time slot.And, for each InterWorking Equipment, the equipment one or more to be connected in can corresponding same module, when a plurality of equipment to be connected of correspondence, the bandwidth of a plurality of hold facilities to be connected must not surpass the bandwidth of current InterWorking Equipment.

The present invention proposes the topological structure of full dispersion, in this structure, all interconnected entities are equal, and interconnection in twos forms netted connection, and time gas exchange ability itself that utilize the CT bus to have, realize that TDM is interconnected between multimode.This method has not only been avoided the adverse effect of centrostigma to system safety, and is easy to realize in standard device flexible configuration.

Claims

1, a kind of multimode that realizes is set up the interconnected method of time division multiplexing, and this method may further comprise the steps:

2, method according to claim 1 is characterized in that described method comprises: preestablish the mapping relations between the CT bus time slot passage that the InterWorking Equipment of the high-speed data-flow of equipment to be connected output in each module and this module takies.

3, method according to claim 1 is characterized in that the output bandwidth of the bandwidth of all equipment outputs to be connected in the described same module smaller or equal to InterWorking Equipment.

4, a kind of multimode that realizes is set up the interconnected device of time division multiplexing, it is characterized in that this device comprises:

5, device according to claim 4 is characterized in that described CPU stores the configuration information that CT Bus Interface Unit and CT bus connect.

6, device according to claim 4 is characterized in that described CT interface chip is an integrated circuit (IC) chip.