CN100388705C - Apparatus and method for providing various sub-rate access to user - Google Patents
Apparatus and method for providing various sub-rate access to user Download PDFInfo
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- CN100388705C CN100388705C CNB2005100985964A CN200510098596A CN100388705C CN 100388705 C CN100388705 C CN 100388705C CN B2005100985964 A CNB2005100985964 A CN B2005100985964A CN 200510098596 A CN200510098596 A CN 200510098596A CN 100388705 C CN100388705 C CN 100388705C
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Abstract
The present invention provides an MTA (Multifunctional Terminal Adapter functional plate) device and a method for providing multiple sub-rate accesses for users. The MTA device which has the functions of a BRA (Basic Rate Access or Interface) physical layer, the second layer and the third layer of an ISDN (Integrated Services Digital Network) is an ISDN terminal device; the MTA device comprises a sub-rate interface module, a U interface module and a message processing module. The method mainly comprises the steps that the user utilizes a rate interface of the MTA device to transmit a user message to the MTA device; the MTA device transmits the user message received to BRA of the ISDN, and the BRA of the ISDN transmits the user message to a network host. By using the method of the present invention, under the precondition that the requirements of multiple sub-rate accesses are met, the remote users can be connected to the DDN (Digital Data Network).
Description
Technical field
The present invention relates to communication field, a kind of equipment and method that provides multiple sub-speed to insert to the user is provided.
Background technology
DDN (Digital Data Network, Digital Data Net) is the communication network that adopts the digital transmission channel transmission of data signals, it can provide Leased line lending circuit point-to-point, point-to-points and the some transparent transmission, and quality digital special circuit and other new business of various speed is provided for the user.
In the actual use of DDN, the user need be linked into the DDN network by various speed, a kind of user is linked into the method for DDN network and is in the prior art: the terminal equipment that the user directly provides by some producers is connected on the DDN network, this terminal equipment can provide each the seed speed less than 64K to insert to the user according to the different demand of different user.
The user is linked into the shortcoming of the method for DDN network and is in the above-mentioned prior art: owing to be subjected to the restriction of terminal device interface, the subscribers feeder distance has only tens meters farthest, so in some places away from the DDN network, the user can't use this method to be linked into the DDN network.If the DDN network is extended to the remote subscriber place,, bring very big burden to operator with increasing very big cost.
Summary of the invention
In view of above-mentioned existing in prior technology problem, a kind of equipment and method that provides multiple sub-speed to insert to the user is provided, thereby can under the requirement of satisfying multiple sub-speed access, remote subscriber be linked in the DDN network.
The objective of the invention is to be achieved through the following technical solutions:
The basic rate that a kind of Multifunctional Terminal Adapter MTA equipment, this equipment possess integrated services digital network ISDN inserts or interface BRA physical layer, 2 layers, 3 layer functions, is a kind of isdn terminal device, comprises as lower module:
Sub-rate interface module: be used for providing each the seed rate interface that is less than or equal to 64Kbits/s to client, receive the various user messages that the user passes over by a kind of interface wherein, this user message is passed to message processing module, and the message that message processing module is passed over returns to the user;
U interface module: be used in the M of this u interface channel, BRA by off-gauge embedd operations channel EOC message and ISDN carries out communication, the message that message processing module is passed over passes to the BRA of ISDN, and the message that the BRA of ISDN is passed over returns to message processing module;
Message processing module: be used for transmitting various message between sub-rate interface module and u interface module, these various message comprise subscriber data message, and various configurations, maintenance information between network host and the MTA equipment.
A kind of method that provides multiple sub-speed to insert to the user comprises:
A, user transmit user message by the rate interface that MTA equipment provides to MTA equipment;
B, described MTA equipment pass to the BRA of ISDN with the user message that receives, and the BRA of this ISDN passes to network host with this user message again.
Described steps A specifically comprises:
The rate interface that MTA equipment provides to the user comprises the V.35 interface of 64K speed, the V.24 interface of 19.2K speed, the V.24 interface of 9.6K speed, the V.24 interface of 4.8K speed and 5 kinds of rate interfaces of V.24 interface of 2.4K speed.
Described step B specifically comprises:
B1, described MTA equipment pass to the BRA that digital subscriber board DSL goes up ISDN by u interface with the user message that receives;
The BRA of B2, described ISDN passes to Digital Data Net DDN main frame by switching network with user message.
Described step B1 specifically comprises:
Communication between described MTA equipment and the DSL comprises physical layer protocol and link layer protocol, in the M channel of the BRA of MTA equipment and ISDN in this u interface, carries out communication by off-gauge EOC message.
Described step B1 specifically comprises:
Whether described MTA equipment and off-gauge EOC passage of DSL all adopt the identical inspection of continuous three frames Trinal-Check mode.
Described step B1 specifically comprises:
After described MTA equipment and DSL receive the Frame that the other side sends, all need to return the affirmation Frame of same bits to the other side.
Described step B1 specifically comprises:
When two identical bytes are arranged in the frame EOC data, described MTA equipment or DSL increase the character boundary of a byte in the middle of these two identical bytes, and a byte of described two identical bytes and increase all sent to the other side, after the other side receives a byte of described increase, this byte is abandoned, do not store.
Described step B1 specifically comprises:
The form of the link layer protocol between described MTA equipment and the DSL comprises frame boundaries, frame length and content frame.
Described step B2 specifically comprises:
The form of the communications protocol between described DSL and the DDN main frame comprises WORD PrimLen primitive length, WORD UPortID port numbers, BYTE PrimID primitive type, BYTE Cmd command word, BYTE Para command parameter.
As seen from the above technical solution provided by the invention, the present invention inserts means by the BRA (basic rate inserts or interface) of MTA (Multifunctional Terminal Adapter) and ISDN (integrated services digital network) for the user provides a kind of new DDN, the present invention can be linked into remote subscriber in the DDN network under the requirement of satisfying multiple sub-speed access.Can make full use of existing Internet resources, avoid the waste of the facilities such as track laying of repetition.
Description of drawings
Fig. 1 is the structure chart of MTA equipment of the present invention;
Fig. 2 is the schematic diagram of the method for the invention;
Fig. 3 is the concrete process chart of the method for the invention.
Embodiment
A kind of equipment and method that provides multiple sub-speed to insert to the user is provided.Core of the present invention is: utilize MTA equipment and ISDN BRA (basic rate inserts or interface) port to realize satisfying the demand of user to multiple speed, can realize that again remote subscriber's DDN inserts.
A kind of equipment that provides multiple sub-speed to insert to the user at first has been provided in the present invention, i.e. MTA equipment, this equipment possess functions such as the BRA physical layer, 2 layers, 3 layers of ISDN, are a kind of isdn terminal devices.The structure chart of this equipment comprises as shown in Figure 1 as lower module:
Sub-rate interface module: be used for providing each the seed rate interface that is less than or equal to 64Kbits/s, V.35 (64K), V.24 (19.2K), V.24 (9.6K), V.24 (4.8K), (2.4K) 5 kinds of rate interfaces V.24 specifically are provided to client.Receive the user by the various user messages that a kind of interface wherein passes over, this user message is passed to message processing module, the message that message processing module is passed over returns to the user.
U interface module: be used for MTA equipment and DSL being joined by u interface, MTA and DSL go up in the M channel of BRA in this u interface of ISDN, carry out communication by off-gauge EOC message, the message that message processing module is passed over passes to DSL, and the message that DSL is passed over returns to message processing module.Communication between MTA and the DSL veneer comprises physical layer protocol and link layer protocol.
Message processing module: be used between sub-rate interface module and u interface module, transmitting various message, comprising message such as the various configurations between subscriber data message and main frame and the MTA equipment, maintenance informations.
Describe the method for the invention in detail below in conjunction with accompanying drawing, the schematic diagram of the method for the invention as shown in Figure 2, the concrete process chart of this method comprises the steps: as shown in Figure 3
Step 3-1, user terminal are linked into MTA equipment by sub-rate interface.
The present invention at first need be provided with MTA equipment recited above and DSL (digital subscriber board) respectively in MPU (host process unit) side of subscriber terminal side and DDN net, and this DSL can provide the professional wiring board of BRA (basic rate inserts or interface) of ISDN.BRA is a kind of business interface of ISDN, often is called 2B+D, and promptly this interface is mainly by 2 B passages, and 1 D passage is formed.
After system start-up, the configuration order that DSL assigns according to the main frame that receives (supporting MTA mode order etc.) for good and all activates MTA equipment.
The user selects a sub-rate interface that MTA equipment provides according to actual needs, by this sub-rate interface to the corresponding user message of MTA equipment transmission.
Step 3-2, MTA equipment carry out communication by the DSL of u interface and user side.
MTA equipment links to each other by the port of u interface with the DSL veneer of user side, in MTA equipment and this DSL veneer in the M channel of BRA in this u interface of ISDN, carry out communication by off-gauge EOC message, MTA equipment passes to the DSL veneer of user side with user's various message, and the various message that the DSL veneer of user side is assigned main frame pass to MTA equipment.
Communication between MTA and the DSL veneer comprises physical layer protocol and link layer protocol, and the communication between MTA equipment and the DSL veneer must meet certain design specification, specifically describes as follows:
1, both sides' EOC (embedd operations channel) passage all adopts Trinal-Check (whether the identical inspection of continuous three frames) mode, has only promptly that continuous three frames are identical just to be accepted.
2, for increasing reliability, after either party (MTA equipment or DSL veneer) received the Frame of certain Bytes that the other side sends, the Frame that all needs to return identical Bytes to the other side was confirmed.
3, if either party does not all receive the correct affirmation message that the other side returns continuously after the other side sends out twice identical Frame, thinks that then the Frame of this byte sends failure.
4, owing to the special processing mode of EOC passage in the above-mentioned u interface chip, promptly after a side sent out two identical bytes, the other side can only produce once to receive interrupted.Therefore, when two identical bytes are arranged in the frame data (EOC data), then must add the character boundary (being defined as 0 * 42 EOC message) of sending out a byte in the centre of these two bytes, the other side receives the byte of this increase in the middle of frame data after, this byte is abandoned, do not store.
The form of the link layer protocol between MTA and the DSL veneer is as shown in table 1,
The form of the link layer protocol between table 1:MTA and the DSL veneer
| Frame boundaries/1Byte | Frame length/1Byte | Content frame/nBytes | Frame boundaries/1Byte |
Being described below of the form of this link layer protocol:
1, in table 1, the value of frame boundaries byte is that (command code is 0 * 4F), and it sends with the form of EOC message in the IDLE order;
2, in table 1, the value of frame length byte is the byte number that content frame comprises, and does not comprise the character boundary (0 * 42) of inserting in the middle of frame length itself and the content frame, and the frame length byte also is that the form with EOC message sends;
3, in table 1, the value of content frame byte is the information that will transmit between main frame and the MTA, and DSL does not do analyzing and processing, and its form is:
| Order/1Byte | Parameter/nBytes |
The DSL of step 3-3, user side carries out communication by the main frame of switching network and DDN net.
The DSL of user side passes to switching network by optical transmission with the message that receives after receiving the message that MTA equipment passes over, switching network passes to this message the main frame of DDN net again.
On the specific implementation 2B passage of various user messages by the BRA of ISDN passed to switching network, send the configuration between main frame and MTA, maintenance information to switching network by the M channel (EOC message) of the BRA of ISDN.
Communication between the main frame of DSL and DDN net also must meet certain standard, specifically describes as follows:
The form of the communications protocol between DSL and the main frame comprises:
WORD PrimLen; / * primitive length */
WORD UPortID; / * port numbers */
BYTE PrimID; / * primitive type */
BYTE Cmd; / * command word */
BYTE Para[]; / * command parameter */
Wherein, PrimID=0 * A2, Cmd and Para[] be main frame and the defined content of MTA communications protocol (being respectively command word and parameter).These two as " content frame " in DSL and the MTA communications protocol, transmits between DSL and MTA with the form of data.
In addition, handle as mistake, when DSL when MTA transmits the frame data that MPU issues, if because of certain interference does not successfully issue these frame data, then DSL reports PrimID=0 * A2 to main frame, Cmd=0 * 03 issue failed message.Main frame needs this message is discerned.
When the port of DSL is the DDC mode, can connect MTA equipment, provide synchronously V.24 for the user by MTA equipment, V.35 wait sub-rate interface.Configuration order sees the following form:
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. a Multifunctional Terminal Adapter MTA equipment is characterized in that, the basic rate that this equipment possesses integrated services digital network ISDN inserts or interface BRA physical layer, 2 layers, 3 layer functions, is a kind of isdn terminal device, comprises as lower module:
Sub-rate interface module: be used for providing each the seed rate interface that is less than or equal to 64Kbits/s to client, receive the various user messages that the user passes over by a kind of interface wherein, this user message is passed to message processing module, and the message that message processing module is passed over returns to the user;
U interface module: be used in the M of this u interface channel, BRA by off-gauge embedd operations channel EOC message and ISDN carries out communication, the message that message processing module is passed over passes to the BRA of ISDN, and the message that the BRA of ISDN is passed over returns to message processing module;
Message processing module: be used for transmitting various message between sub-rate interface module and u interface module, these various message comprise subscriber data message, and various configurations, maintenance information between network host and the MTA equipment.
2. a method that provides multiple sub-speed to insert to the user is characterized in that, comprising:
A, user transmit user message by the rate interface that MTA equipment provides to MTA equipment;
B, described MTA equipment pass to the BRA of ISDN with the user message that receives, and the BRA of this ISDN passes to network host with this user message again.
3. according to the described method that provides multiple sub-speed to insert to the user of claim 2, it is characterized in that described steps A specifically comprises:
The rate interface that MTA equipment provides to the user comprises the V.35 interface of 64K speed, the V.24 interface of 19.2K speed, the V.24 interface of 9.6K speed, the V.24 interface of 4.8K speed and 5 kinds of rate interfaces of V.24 interface of 2.4K speed.
4. according to claim 2 or the 3 described methods that provide multiple sub-speed to insert to the user, it is characterized in that described step B specifically comprises:
B1, described MTA equipment pass to the BRA that digital subscriber board DSL goes up ISDN by u interface with the user message that receives;
The BRA of B2, described ISDN passes to Digital Data Net DDN main frame by switching network with user message.
5. according to the described method that provides multiple sub-speed to insert to the user of claim 4, it is characterized in that described step B1 specifically comprises:
Communication between described MTA equipment and the DSL comprises physical layer protocol and link layer protocol, in the M channel of the BRA of MTA equipment and ISDN in this u interface, carries out communication by off-gauge EOC message.
6. according to the described method that provides multiple sub-speed to insert to the user of claim 5, it is characterized in that described step B1 specifically comprises:
Whether described MTA equipment and off-gauge EOC passage of DSL all adopt the identical inspection of continuous three frames Trinal-Check mode.
7. according to the described method that provides multiple sub-speed to insert to the user of claim 5, it is characterized in that described step B1 specifically comprises:
After described MTA equipment and DSL receive the Frame that the other side sends, all need to return the affirmation Frame of same bits to the other side.
8. according to the described method that provides multiple sub-speed to insert to the user of claim 5, it is characterized in that described step B1 specifically comprises:
When two identical bytes are arranged in the frame EOC data, described MTA equipment or DSL increase the character boundary of a byte in the middle of these two identical bytes, and a byte of described two identical bytes and increase all sent to the other side, after the other side receives a byte of described increase, this byte is abandoned, do not store.
9. according to the described method that provides multiple sub-speed to insert to the user of claim 5, it is characterized in that described step B1 specifically comprises:
The form of the link layer protocol between described MTA equipment and the DSL comprises frame boundaries, frame length and content frame.
10. according to the described method that provides multiple sub-speed to insert to the user of claim 5, it is characterized in that described step B2 specifically comprises:
The form of the communications protocol between described DSL and the DDN main frame comprises WORD PrimLen primitive length, WORD UPortID port numbers, BYTE PrimID primitive type, BYTE Cmd command word, BYTE Para command parameter.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100985964A CN100388705C (en) | 2005-09-06 | 2005-09-06 | Apparatus and method for providing various sub-rate access to user |
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| CNB2005100985964A CN100388705C (en) | 2005-09-06 | 2005-09-06 | Apparatus and method for providing various sub-rate access to user |
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| CN100388705C true CN100388705C (en) | 2008-05-14 |
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| CN103559379A (en) * | 2013-09-24 | 2014-02-05 | 许继集团有限公司 | Data source validity judging method and double-data-source selecting method |
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2005
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