CN1287454A - Digital data network for paging stations in different area - Google Patents
Digital data network for paging stations in different area Download PDFInfo
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- CN1287454A CN1287454A CN 99117068 CN99117068A CN1287454A CN 1287454 A CN1287454 A CN 1287454A CN 99117068 CN99117068 CN 99117068 CN 99117068 A CN99117068 A CN 99117068A CN 1287454 A CN1287454 A CN 1287454A
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Abstract
One terminal of the equipment that is in use by the invention is connected with ISDN and PSTN via E1 interface and analog interface, another terminal is connected with DDN leased line via V.35 interface. With this mode, the compressed speech data can be transmitted through DDN special line. The characteristics are small delay of DDN data transmission, high reliability and guarantee of speech transmission quality. It also provides a new business for radio calling field.
Description
The paging centers that the present invention relates to the communications field is logical by the strange land line that DDN carries out.
The scheme of paging centers's networking is at present undertaken by renting the DDN special line substantially.Present business only provides being connected of far-end and central point, carries out between far-end and the central point transmission of simple compressed voice or control information.Paging centers's queue machine generally only provides the line between the local user logical function, is about to two modes that the user couples together.
The present invention seeks to be increases software at central point and far-end under the constant situation of above-mentioned connected mode, provide software to support the function that the strange land line is logical.
The present invention is that the strange land line of a kind of DDN of paging centers is logical, it is between some key cities of radio call networking platform and key city and built between virtual the city, strange land and couple together with Data-carrying network DDN, when calling called paging machine and when requiring to talk about again immediately, called can be at above-mentioned center and the strange land city scope set up toll message with dialing local telephone network mode and calling subscriber.Its end is by the E1 interface, and ISDN or analog interface link to each other with PSTN net or queuing device, and the compressed speech data packet interface is that V.35 interface is rented special line with DDN and linked to each other.Voice data is by the central point transmission of transferring, and central point is rented special line by DDN and is connected with more than one far-end.Connect by this mode, when 2 different local phones carried out line, voice data was transferred by central point.Central point connects the remote equipment more than 2.When center and far-end communicated, data transmitted the transmission that the agreement that adopts the class frame relay is carried out speech and control information.
Operation principle of the present invention is: when carrying out the logical function of paging centers's strange land line, promptly connect the opposing party when customer call another one customer requirements, to paging system two users are coupled together continuing of whole process and control and finish by the software control of central point.After the successful connection, the voice packets after two users' speech compresses through multiple connection equipment can transmit through central point.By the reusability of voice compression and quietness technology raising circuit, improve the speech quality of speech by cancelling out echo and comfort noise technology.
Background technology of the present invention has following advantage: the speed of speech on PSTN is 64Kb/s, take voice compression technology what happened latter velocity of sound rate can be reduced to 5.3～6.4Kb/s or low rate more, adopt this mode can be on a circuit transfer ratio analog call more calling, by adopting the mode of statistic multiplexing, make network resource usage efficient better, thereby saved circuit rent expense.By providing line to lead to function, provide a new business simultaneously to paging centers.The communication protocol that multiple connection equipment uses adopts the class frame relay protocol, reduces the delay of speech, and the error correction of control data is finished by application layer, relatively is fit to the transmission of speech on DDN.
Embodiment is described in further detail among the present invention in conjunction with the accompanying drawings:
Fig. 1 is a system configuration general principles block diagram of the present invention.
Fig. 2 realizes the load mode of compressed speech data and control information for system.
Show that as Fig. 1 system configuration general principles of the present invention such as figure example show.When Center was connected with two above Remote, the user of Remote1 called out the user of Remote2 by PSTN, Remote2 subscriber callback Remote1 user, and Center connects two user sessions.Whole process, Center is master control side.Central point is controlled whole handshaking procedure, and the voice packets of the multiple connection equipment of two far-ends is transferred through central point.Simultaneously, the interface of equipment and PSTN adopts by the E1 interface, ISDN or analog interface.Can adopt China No. 1, analog line signaling, E﹠amp; M signaling, Chinese signalling system No.7, V5.2 or ISDN access signaling.
Show that as Fig. 2 when guaranteeing speek voice quality, control messages is also handled timely.When carrying out the transmission of speech and control data, we must guarantee that voice packets can send n continuously behind control messages bag of every transmission, can not cause overstocking of a certain class message like this, have guaranteed speech and data message.The communication protocol that multiple connection equipment (MUX Device) uses adopts the class frame relay protocol, be that data link layer protocol does not adopt the error correction by automatic repetition agreement, only adopt the wrong method that just abandons of finding, make the efficient of communication reach the highest, thereby reduce the delay of speech, the error correction of control data is finished by application layer.
Claims (2)
1. the strange land line of the DDN of paging centers is logical, it is characterized in that: between some key cities of radio call networking platform and key city and built between virtual the city, strange land and couple together with Data-carrying network DDN, when calling called paging machine and when requiring to talk about again immediately, called can be at above-mentioned center and the strange land city scope set up toll message with dialing local telephone network mode and calling subscriber.
2. the strange land line according to the claim 1 described DDN of paging centers is logical, it is characterized in that: an end is by the E1 interface, ISDN or analog interface link to each other with PSTN net or queuing device, the compressed speech data packet interface is that V.35 interface is rented special line with DDN and linked to each other, voice data is by the central point transmission of transferring, central point is rented special line by DDN and is connected with more than one far-end, connect by this mode, when 2 different local phones carry out line, voice data is transferred by central point, central point connects the remote equipment more than 2, and when center and far-end communicated, data transmitted the transmission that the agreement that adopts the class frame relay is carried out speech and control information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99117068 CN1287454A (en) | 1999-09-08 | 1999-09-08 | Digital data network for paging stations in different area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99117068 CN1287454A (en) | 1999-09-08 | 1999-09-08 | Digital data network for paging stations in different area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1287454A true CN1287454A (en) | 2001-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99117068 Pending CN1287454A (en) | 1999-09-08 | 1999-09-08 | Digital data network for paging stations in different area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1287454A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388705C (en) * | 2005-09-06 | 2008-05-14 | 华为技术有限公司 | Apparatus and method for providing various sub-rate access to user |
| CN100421411C (en) * | 2005-09-06 | 2008-09-24 | 华为技术有限公司 | Method and apparatus for transmitting information between digital data net and network |
| CN100446475C (en) * | 2006-04-18 | 2008-12-24 | 华为技术有限公司 | Transmitting system and method |
-
1999
- 1999-09-08 CN CN 99117068 patent/CN1287454A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388705C (en) * | 2005-09-06 | 2008-05-14 | 华为技术有限公司 | Apparatus and method for providing various sub-rate access to user |
| CN100421411C (en) * | 2005-09-06 | 2008-09-24 | 华为技术有限公司 | Method and apparatus for transmitting information between digital data net and network |
| CN100446475C (en) * | 2006-04-18 | 2008-12-24 | 华为技术有限公司 | Transmitting system and method |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |