CN111866294A - Implementation method of self-exchange function and IAD equipment - Google Patents
Implementation method of self-exchange function and IAD equipment Download PDFInfo
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- CN111866294A CN111866294A CN202010534560.0A CN202010534560A CN111866294A CN 111866294 A CN111866294 A CN 111866294A CN 202010534560 A CN202010534560 A CN 202010534560A CN 111866294 A CN111866294 A CN 111866294A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
- H04M7/0066—Details of access arrangements to the networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
- H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
- H04Q3/542—Logic circuits or arrangements therefor
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Abstract
The invention relates to a method for realizing self-exchange function and IAD equipment, wherein the IAD equipment comprises a user interface module, a digital cross-connection module and a data transmission module, wherein the user interface module is used for accessing voice service and transmitting voice data to the digital cross-connection module; a digital cross connect module for transmitting voice data to the control unit by controlling digital cross connect allocation, or transmitting voice data back to the user interface module by performing time slot cross; the control unit comprises a DSP module and a processing module connected with a WAN port; the DSP module is used for packaging and processing the voice data and transmitting the voice data to the processing module; and the processing module is used for receiving and outputting the data processed by the DSP module through the WAN port. When the IAD is in self-exchange, the simulation user carries out time slot lapping at the cross connection chip after call connection is established, the conversation is completed, DSP resources are not occupied at the moment, and the full concurrent call of the simulation access user can be completed.
Description
Technical Field
The invention belongs to the field of network communication, and relates to a method for realizing a self-switching function and IAD equipment.
Background
The IAD is an access device facing personal users and small-sized enterprise users, various terminal devices of a user end, such as a PC, a telephone, a fax machine and the like, are accessed into a packet switching network, the IAD based on an IP network can carry out transparent transmission on data services and VoIP processing on voice, and a plurality of services can be provided for the users. A wide variety of IAD equipment exists in the market, the access capability of a simulation user is different from 4 to 256 paths, and the multi-homing, local self-switching and the like are supported in the aspect of reliability.
The prior IAD equipment has two development trends, one is miniaturization and simplification, and a single equipment has 4-path or 8-path simulated user access capacity, thereby meeting the use requirements of common families or independent places. And the second method is systematization, namely, a board card form is adopted, stacking is carried out in the system to complete capacity expansion, and flexible configuration can meet enterprise-level application. Under a miniaturized scene, the MCU is adopted to process voice or service in the internal implementation, the processing capability is low, and the service function is simple. Under a systematized scene, most of the VoIP processing is completed by using a special DSP or an MCU with a DSP core, and the VoIP processing is rich in coding format and comprehensive in service function.
In the aspect of realizing self-switching, a miniaturized product does not generally have the function, and a systematic product completes the self-switching of a local user through the configuration of the DSP when the systematic product judges that an internal call is called.
The miniaturized product is not suitable for large and medium-sized places due to limited capacity, so that the miniaturization is not repeated. The systematic product has relatively large capacity, and the processing capacity of the DSP to the voice is positively correlated with the price of the DSP, so that two solutions are provided, one of which is to select the grade of the DSP according to the estimated maximum concurrency number, and the economic and practical purposes are achieved. And secondly, the DSP is selected by taking the full concurrent call as an index, so that the requirement on the DSP is higher, the cost is increased, and the economic benefit is lower.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an IAD device, which completely releases DSP resources during local calling and can achieve local full-concurrent calling.
The invention also provides a method for realizing the self-exchange function of the IAD equipment.
An IAD device according to an embodiment of the first aspect of the invention comprises: the user interface module is used for accessing the voice service and transmitting the voice data to the digital cross connection module; the digital cross connection module is used for transmitting the voice data to the control unit by controlling the digital cross connection or transmitting the voice data back to the user interface module by carrying out time slot cross; the control unit comprises a DSP module and a processing module connected with a WAN port; the DSP module is used for packaging and processing voice data and transmitting the voice data to the processing module; and the processing module is used for receiving and outputting the data processed by the DSP module through a WAN port.
The IAD equipment provided by the embodiment of the invention has at least the following beneficial effects:
the digital cross connection module realizes that the analog user carries out time slot overlapping at the cross connection chip after the call connection is established, completes the conversation, does not occupy DSP resources at the moment, and can complete the full concurrent call of the analog access user.
According to some embodiments of the present invention, the user interface module comprises an 8-chip 16-way programmable thick film for providing access capability to 128-way users. The IAD equipment of the embodiment adopts N × 16 programmable thick films to finish the simulation of user access, and the integration level is higher; the IAD equipment of this embodiment has 128 routes of user's of simulation access ability, satisfies inside networking demand under the general environment, and the structure is 1U height simpler and convenient to use only, and 1U 19 inches structure can be placed in the desktop and also can be fixed in the standard frame and regard as computer lab equipment, still can regard as portable equipment interim networking simultaneously, is applicable to various application environment.
According to some embodiments of the invention, the digital cross connect module is implemented by logic programming by an FPGA.
According to some embodiments of the invention, the FPGA transmits voice data to the TSIP interface of the DSP module through a control digital cross-connect when the call type is an external call.
According to some embodiments of the present invention, when the call type is an internal call, the IAD device enables a self-switching procedure, and the FPGA transmits voice data back to the user interface module through a slot crossing. The time slot cross processing capacity of the FPGA is not lower than that of a 2k port, so that internal full-concurrent calling of 128-path users can be realized. DSP processing is not needed, so that DSP resources are saved, and the workload is lightened.
According to some embodiments of the invention, the control unit is an MCU with a DSP core.
According to some embodiments of the present invention, the processing module is a CPU connected with dual WAN ports, and is configured to output data received from the DSP module to the outside from two RJ45 interfaces respectively. In the IAD device of this embodiment, the CPU is used as an external interface of the network, and the reliability of network connection can be enhanced by using a dual backup method. The dual WAN ports have the advantage that when the network connection of one of the ports is interrupted, data can be transmitted by the other port, so that the reliability of the data on the network is enhanced.
According to a second aspect of the present invention, a method for implementing a self-switching function of an IAD device according to any of the first aspect of the present invention includes the following steps: the user interface module accesses the voice service and transmits the voice data to the digital cross connection module; the digital cross-connect module transmits voice data to the control unit by controlling digital cross-connect allocation, or transmits the voice data back to the user interface module by performing time slot cross; the DSP module of the control unit packs and processes the voice data and transmits the voice data to the processing module; and the processing module receives and outputs the data processed by the DSP module to the outside through a WAN port.
Since the IAD device according to any one of the first aspect of the present invention is applied to the method for implementing the self-switching function according to the embodiment of the present invention, all the advantageous effects of the first aspect of the present invention are achieved.
According to some embodiments of the invention, the method further comprises: when the call type is an external call, the FPGA transmits voice data to a TSIP interface of the DSP module through digital cross connection, and the DSP module performs packaging processing on the voice data and then transmits the voice data to a CPU module through an RGMII interface.
According to some embodiments of the invention, the method further comprises: and the CPU module internally outputs the data received by the RGMII interface from the two RJ45 interfaces.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a hardware connection block diagram of an embodiment of the present invention;
FIG. 2 is a hardware connection block diagram of another embodiment of the present invention;
FIG. 3 is a flow diagram of a method of an embodiment of the present invention;
FIG. 4 is a flow chart of a method of another embodiment of the present invention;
fig. 5 is a flow chart of a method of yet another embodiment of the present invention.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, in an IAD device according to an embodiment of the present invention, there are included: the user interface module is used for accessing the voice service, is connected with the digital cross connection module and transmits the voice data to the digital cross connection module. The digital cross-connect module transmits the voice data to the control unit by controlling the digital cross-connect allocation, or transmits the voice data back to the user interface module by carrying out time slot cross to realize the conversation. And the control unit comprises a DSP module and a processing module connected with a WAN port. The DSP module packs and processes the voice data and transmits the voice data to the processing module; and the processing module receives and outputs the data processed by the DSP module through the WAN port.
Referring to fig. 2, in some embodiments, the user interface module adopts 16 programmable thick films with the highest current integration level, and 8 pieces in total can provide access capability of 128 users, and the data stream is in a PCM format of 8M. A digital cross connection module is added between the user interface and the DSP, and the IAD is realized by logic programming through the FPGA. When the single board is in an external call (non-self-exchange state), user voice data are distributed in the FPGA through controlling digital cross connection to transmit code streams to a TSIP interface of the DSP, the DSP performs voice packaging processing and then transmits the voice data to a CPU module through an RGMII interface, and the output received by the RGMII interface is externally output from two RJ45 interfaces respectively inside the CPU. The dual WAN ports have the advantage that when the network connection of one of the ports is interrupted, data can be transmitted by the other port, so that the reliability of the data on the network is enhanced.
When a certain user dialing number is judged to be an internal call, the self-switching process is started, the traditional design is that after the TSIP interface of the DSP receives data, time slot crossing is carried out in the DSP, and then internal communication is realized after returning from the TSIP interface of the DSP. The embodiment of the invention carries out time slot crossing in the FPGA when the internal call is judged, and directly transmits the voice data back to the user interface module to realize the conversation. The time slot cross processing capacity of the FPGA is not lower than that of a 2k port, so that internal full-concurrent calling of 128 users can be realized. The flow does not need to be processed by a DSP, so that DSP resources are saved, and the workload is lightened.
In some embodiments, programmable thick films of other capacities are used as the analog subscriber access module.
In some embodiments, the DSP and the CPU are combined and realized by adopting an MCU with a DSP core; the digital cross connection module is realized by adopting a special chip.
Referring to the method flow diagram of the embodiment of the invention of fig. 3, the method of the embodiment of the invention comprises the following steps: the user interface module accesses the voice service and transmits the voice data to the digital cross connection module; the digital cross connection module transmits the voice data to the control unit by controlling digital cross connection distribution or transmits the voice data back to the user interface module by carrying out time slot cross; the DSP module of the control unit packs and processes the voice data and transmits the voice data to the processing module; and the processing module receives and outputs the data processed by the DSP module through the WAN port.
With further reference to fig. 4, the method of an embodiment of the present invention further comprises: when the calling type is internal calling, the digital cross connection module transmits the voice data back to the user interface module by carrying out time slot cross to realize conversation.
With further reference to fig. 5, the method of an embodiment of the present invention further comprises: when the calling type is an external calling state, the voice data is distributed in the FPGA through controlling digital cross connection to transmit the code stream to a TSIP interface of the DSP module, and the DSP module packs the voice data and then transmits the voice data to the CPU module through an RGMII interface.
In some embodiments, the data received by the RGMII interface is externally output from the two RJ45 interfaces respectively inside the CPU module.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.
Claims (10)
1. An IAD device, comprising:
the user interface module is used for accessing the voice service and transmitting the voice data to the digital cross connection module;
the digital cross connection module is used for transmitting the voice data to the control unit by controlling the digital cross connection or transmitting the voice data back to the user interface module by carrying out time slot cross;
the control unit comprises a DSP module and a processing module connected with a WAN port;
the DSP module is used for packaging and processing voice data and transmitting the voice data to the processing module;
and the processing module is used for receiving and outputting the data processed by the DSP module through the WAN port.
2. The IAD device of claim 1, wherein the user interface module comprises an 8-chip 16-way programmable thick film for providing 128-way user access capability.
3. The IAD device of claim 1, wherein the digital cross connect module is implemented by logic programming by an FPGA.
4. The IAD device of claim 3, wherein the FPGA transmits voice data to the TSIP interface of the DSP module over a control digital cross connect when the call type is an external call.
5. The IAD device of claim 3, wherein when the call type is an internal call, the IAD device enables a self-switching procedure, and wherein the FPGA transmits voice data back to the user interface module through a slot crossing.
6. The IAD device of claim 1, wherein the control unit is an MCU having a DSP core.
7. The IAD device of claim 1, wherein the processing module is a CPU connected with dual WAN ports, and configured to output the data received from the DSP module to the outside through two RJ45 interfaces.
8. A method for implementing the self-switching function of the IAD device according to any of claims 1 to 7, comprising the steps of:
The user interface module accesses the voice service and transmits the voice data to the digital cross connection module;
the digital cross connection module transmits voice data to the control unit by controlling digital cross connection, or transmits the voice data back to the user interface module by carrying out time slot cross;
the DSP module of the control unit packs and processes the voice data and transmits the voice data to the processing module;
and the processing module receives and outputs the data processed by the DSP module to the outside through a WAN port.
9. The method of claim 8, wherein the method further comprises:
when the call type is an external call, the FPGA transmits voice data to a TSIP interface of the DSP module through control digital cross connection, and the DSP module transmits the voice data to a CPU module through an RGMII interface after packaging.
10. The method of claim 9, wherein the method further comprises:
and the CPU module internally outputs the data received by the RGMII interface from the two RJ45 interfaces.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010534560.0A CN111866294A (en) | 2020-06-12 | 2020-06-12 | Implementation method of self-exchange function and IAD equipment |
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| CN202010534560.0A CN111866294A (en) | 2020-06-12 | 2020-06-12 | Implementation method of self-exchange function and IAD equipment |
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| CN111866294A true CN111866294A (en) | 2020-10-30 |
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| CN1527550A (en) * | 2003-03-06 | 2004-09-08 | 华为技术有限公司 | IP access method and system of phonetic service |
| US20050047400A1 (en) * | 2003-08-29 | 2005-03-03 | Carol Ansley | Method and system for processing voice traffic from a multi-channel link into a VoIP network over a broadband network |
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Application publication date: 20201030 |