CN102811156A - Packet transport network (PTN) equipment and packet service transmission method - Google Patents

Abstract

The invention discloses a packet transfer network PTN device, which includes a main system processing module and a digital subscriber line DSL board card, wherein the main system processing module is used to send an Ethernet packet corresponding to a packet service to the DSL board card , and receive the Ethernet packet transmitted by the DSL board; the DSL board is used to process the Ethernet packet received from the main system processing module to obtain a DSL signal that can be transmitted on the DSL line and send it to the DSL Transmission on the line; process the DSL signal from the DSL line to obtain an Ethernet packet, and send it to the main system processing module. The present invention enables operators to use this solution to carry HSDPA and other low-delay-required services in applications where it is not very convenient to set up foreign networks and thus need to rent DSL lines that have been set up by others, which greatly saves the cost of operators .

Description

A kind of PTN equipment and packet service transmission method

technical field

The present invention relates to DSL (Digital Subscriber Line, Digital Subscriber Line) technology and PTN (Packet Transport Network, packet transmission network) technology in the communication technology, relate in particular to a kind of PTN equipment and packet service transmission method.

Background technique

With the continuous development of communication technology, telecommunication services are gradually becoming IP-based, and the services carried by the transmission network have changed from TDM (Time Division Multiple, Time Division Multiplexing) transmission to IP packet transmission. Because the digital subscriber line xDSL transmission network designed for TDM services has problems such as insufficient bandwidth, information delay and network maintenance difficulties in the process of transmitting packet services, the traditional xDSL transmission network has been difficult to meet the transmission requirements of IP packet services.

The multi-service transmission platform MSTP technology based on SDH (Synchronous Digital Hierarchy) can provide the transmission function of carrier-class packet services to a certain extent, which is the evolution trend of optical transport network to IP packet transmission. But MSTP still uses TDM as the core, so it is more and more difficult to meet the application requirements based on packet services.

The emergence of PTN (Packet Transport Network, Packet Transport Network) technology has solved this problem very well. Packet transport network is a connection-oriented multi-service transport technology that emphasizes the transmission of data packets, transforming the traditional transport network into IP, and has the advantages of QOS guarantee, high reliability, carrier-level maintenance and management, and scalability, as shown in Figure 1 Shown is the existing PTN network architecture diagram, the base station Node B is connected with the radio network controller RNC through the PTN equipment.

With the evolution of traditional xDSL network to PTN network, the entire communication network has become complex and changeable, especially in foreign communication networks. In order to save costs and make full use of existing resources, operators often It is not that the entire network as shown in Figure 1 adopts the PTN network architecture. For services such as HSDPA (High Speed Downlink Packet Access, High Speed Downlink Packet Access) that do not require a high delay, various digital data may be rented in the middle. The subscriber line xDSL network is connected with DSLAM (Data Subscriber Line Access Multiplexer, digital subscriber line access multiplexer) equipment to carry this part of the business. In this case, the use of xDSL lines to bear the weight of packet transmission services emerges as the times require.

However, there is currently no good solution for how to lease the xDSL network during packet service transmission.

Contents of the invention

The invention provides a PTN device and a packet service transmission method to meet the needs of operators to use xDSL lines to carry packet transmission services during the transition period from an SDH network to a PTN network. The present invention utilizes a large number of xDSL transmission networks that have been laid to fully The existing resources are utilized, and the networking cost is reduced.

In order to solve the above technical problems, the present invention provides a packet transport network PTN device, including a main system processing module and a digital subscriber line DSL board, wherein:

The main system processing module is used to send the Ethernet packet corresponding to the packet service to the DSL board, and receive the Ethernet packet transmitted by the DSL board;

The DSL board is used to process the Ethernet packet received from the main system processing module to obtain a DSL signal that can be transmitted on the DSL line, and send it to the DSL line for transmission; to process the DSL signal from the DSL line Get the Ethernet packet and send it to the main system processing module.

The present invention also provides a packet service transmission method, including:

When sending the packet service, the main system processing module sends the Ethernet packet corresponding to the packet service to the DSL board;

The DSL board will process the Ethernet packet received from the main system processing module to obtain a DSL signal that can be transmitted on the DSL line, and send it to the DSL line for transmission;

When receiving packet services, the DSL board processes the DSL signal from the DSL line to obtain an Ethernet packet, and sends it to the main system processing module; the main system processing module receives the Ethernet packet transmitted by the DSL board.

The invention supports slicing and packet processing of Ethernet packets exceeding the carrying capacity of DSL lines, and realizes the application of DSL lines to transmit packet services, so that operators can set up some foreign networks that are not very convenient and need to be rented by others. In the application of DSL lines, this solution is used to carry services with low delay requirements such as HSDPA, which greatly saves the cost of operators.

Description of drawings

FIG. 1 is a schematic diagram of a current packet transmission network;

Fig. 2 is a kind of DSL board composition structural diagram provided by the present invention;

Fig. 3 is a kind of packet transmission network system provided by the present invention;

Fig. 4 is a kind of sending packet service method provided by the present invention;

FIG. 5 is a method for receiving packet services provided by the present invention;

Fig. 6 is a DSL board processing method provided by the present invention.

Detailed ways

The PTN equipment and packet service transmission method proposed by the present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

The invention provides a packet transmission network PTN device, which can be realized by integrating a DSL board on the PTN system device, wherein the PTN system device includes a main system processing module and can communicate with the DSL board. The working principle of the whole device is: the main system processing module sends the Ethernet packet corresponding to the packet service received by the device to the DSL card, and the DSL card processes the received Ethernet packet to obtain the DSL card that can be transmitted on the DSL line. The signal is sent to the DSL line for transmission; the DSL board processes the DSL signal from the DSL line to obtain an Ethernet packet, and sends it to the main system processing module for processing.

By inserting a DSL card into the PTN system equipment, the mutual conversion between the packet service and the DSL signal is completed, thereby realizing the transmission of the packet service on the DSL line, so that the operator can set up some foreign networks that are not very good It is convenient for applications that need to rent DSL lines that have been set up by others. Using this solution to carry services with low latency requirements such as HSDPA greatly saves the cost of operators.

The current existing PTN network can use E1 technology to transmit TDM services, but this is only applicable to the situation that the entire network adopts the PTN network architecture. Preferably, when using the packet transfer network PTN device of the present invention, the main system processing module can use The received TDM service is encapsulated into an Ethernet packet, and then sent to the DSL board for DSL signal conversion processing.

Preferably, the main system processing module can send the Ethernet packets accessed by other existing boards in the PTN system equipment to the DSL board.

As shown in Figure 2, the DSL board in this embodiment is composed of a control module 201, a logic module 202, a DSL processing module 203, a clock module 204, a power module 205 and a DSL interface 206, wherein,

The control module 201 is responsible for communicating with the main system processing module of the PTN system equipment, and as the control unit of the entire DSL board, is responsible for controlling the logic module 202 and the DSL processing module 203 to process data.

Preferably, the control module 201 mainly includes a CPU for communicating with the main system processing module, a CPLD for resetting and decoding of each module on the DSL board, and a CPLD for guiding the control module to start the BOOT ROM. After being inserted into the PTN system equipment, the control module 201 completes the board startup, version loading, logic loading and other processes, and communicates with the main system processing module to ensure the normal operation of the entire DSL board.

Logic module 202, for under the control of control module 201, carry out the processing related to business logic with the Ethernet bag that receives from main system processing module, and send the processed Ethernet bag to DSL processing module 203; The processing module 203 performs business logic-related processing on the received Ethernet packets, and sends the processed Ethernet packets to the main system processing module.

Preferably, the logic module 202 distributes the Ethernet packets received from the main system processing module to the DSL processing module 203 in parallel, and aggregates and sends the Ethernet packets received from the DSL processing module 203 to the main system processing module.

Preferably, the logic module 202 can perform the following business logic-related processing on the Ethernet packet: encapsulating the OAM message for operation, maintenance and management of the transmission equipment, and making the transmission more reliable; encapsulating the 1588 clock synchronization protocol message for Keep the clock and time synchronization between the devices at both ends.

Preferably, the logic module 202 is connected to the DSL processing module 203 through an 8-way media independent interface.

The DSL processing module 203 is used to convert the Ethernet packet received from the logic module 202 into a DSL signal and send it to the DSL line for transmission under the control of the control module 201; convert the DSL signal received from the DSL line into an Ethernet packet Then send to the logic module 202.

Preferably, the DSL processing module 203 converts Ethernet services into DSL signals, including processes such as DSL framing, encoding, modulation, and drive amplification; the processing of converting DSL signals into Ethernet packets includes DSL demodulation, decoding, and deframing .

Preferably, the DSL processing module 203 uses two DSL chips to process parallel data, wherein each DSL chip supports the processing of 4 DSL signals;

Preferably, the DSL processing module 203 sends out the DSL signal through the DSL interface 206 .

The clock module 204 is used to provide a stable clock for the entire DSL board.

The power module 205 is used to provide stable power for the entire DSL board.

The DSL interface 206 is used to connect with the DSL processing module 203 and the DSL line respectively, and transmit DSL signals between the DSL processing module 203 and the DSL processing module 203 in parallel.

Preferably, the number of ports for parallel transmission of DSL signals by the DSL interface 206 is consistent with the number of ports for parallel transmission of Ethernet packets between the logic module 202 and the DSL processing module 203, for example, the DSL interface 206 uses the 8-way media-independent interface used by the logic module 202 The corresponding 8-way interface.

For the packet transfer network PTN device in this embodiment, preferably, when the main system processing module determines that the Ethernet packet exceeds the carrying capacity of one or more DSL lines, the Ethernet packet is determined to be an overloaded Ethernet packet, and When it is determined that an overloaded Ethernet packet is sent, a binding instruction is sent to the control module 201 of the DSL board; when the control module 201 receives the binding instruction sent by the main system processing module, the control logic module 202 sends the business logic to the The overloaded Ethernet packet after relevant processing is sent to the DSL processing module 203, and the DSL processing module 203 is controlled to slice the overloaded Ethernet packet, and after adding a slice mark to the Ethernet packet after the slice, the Ethernet packet is converted into a DSL signal processing.

Preferably, the embodiment of the present invention adopts the packet transmission network system as shown in Figure 3, wherein the packet transmission service is sent to the uplink DSLAM device via the DSL line in the form of a DSL signal, and passes through an MPLS network or an IP network After that, it is sent to RNC (RadioNetwork Controller, radio network controller) via the remote PTN device.

The present invention provides a packet service transmission method, which is divided into two types: sending a packet service direction and receiving a packet service direction, wherein the sending packet service direction is shown in Figure 4, and includes the following steps:

Step S401, the UNI user interface of the PTN system equipment accesses the Ethernet packet.

Step S402, the main system processing module judges whether there is an Ethernet packet exceeding the carrying capacity of the DSL line, if not, execute step S403, otherwise, execute step S408.

In step S403, the main system processing module sends the Ethernet packet to the DSL board, and step 404 is executed.

In step S404, the control module of the DSL board controls the logic module and the DSL processing module to process the Ethernet packet, and step S405 is executed.

Step S405, the logic module receives the Ethernet packet from the main system processing module, and after processing the Ethernet packet related to business logic, distributes it to the DSL processing module in parallel, and executes step S406.

Step S406, the DSL processing module receives the parallel Ethernet packet, converts and processes the DSL signal and sends it to the DSL interface.

Step S407, the DSL interface directly sends the DSL signal to the DSL line for transmission.

Step S408, when the main system processing module determines that there is an overloaded Ethernet packet to be sent, it generates a label for the overloaded Ethernet packet, and sends a binding instruction to the control module to instruct the overloaded Ethernet packet to be sliced and packaged, and execute Step S409.

In step S409, the main system processing module sends the overloaded Ethernet packet carrying the label to the DSL board, and then step S410 is executed.

Step S410, when the control module receives the binding instruction, it sends an overload processing instruction to the logic module, sends a slice processing instruction to the DSL processing module, and executes step S411;

In step S411, the logic module receives the overloaded Ethernet packet, performs business logic-related processing on it, and sends it to the DSL processing module through a designated port, and executes step S412.

Step S412, the DSL processing module performs slicing processing on the overloaded Ethernet packet, and after adding a slicing identifier to the sliced Ethernet packet, converts the Ethernet packet into a DSL signal, and sends it to the DSL interface, and executes Step S413.

In step S413, the DSL interface sends the DSL signal to the DSL line for transmission.

The receiving packet service direction is shown in Figure 5, including the following steps:

In step S501, the DSL board receives the parallel DSL signal transmitted by the DSL line.

Step S502, the DSL processing module processes the parallel DSL signal to obtain a parallel Ethernet packet, and sends it directly to the logic module.

Step S503, the logic module receives the parallel Ethernet packets from the DSL processing module, and after processing the Ethernet packets related to business logic, aggregates the parallel Ethernet packets and sends them to the main system processing module.

Step S504, the main system processing module receives the Ethernet packet, performs service exchange on it, and sends it to other existing boards of the PTN system equipment.

Preferably, the main system processing module can specify the number of slices that will be sliced into the overloaded Ethernet packet and which ports of the DSL interfaces can be used to bind and send the Ethernet packet after the group packet, and include these information in the report to the control module In the binding instruction sent; when the control module receives the binding instruction, the overload processing instruction sent to the logic module contains information on which port the overloaded Ethernet packet carrying the label is sent to the DSL processing module, and The slicing processing instruction sent by the control module to the DSL processing module contains the following information: the port path for receiving the overloaded Ethernet packet, the number of times the overloaded Ethernet packet needs to be sliced, and the port bindings of which DSL interfaces are used Send the Ethernet packet after grouping.

Preferably, the embodiment of the present invention uses the DSL board processing shown in Figure 6, wherein the logic module performs business logic-related processing on the Ethernet packet, specifically including encapsulating the Ethernet packet with an OAM message and a 1588 clock synchronization protocol report. Text: The DSL processing module converts Ethernet services into DSL signals, including DSL framing, encoding, modulation, drive amplification, etc., and converts DSL signals into Ethernet packets, including DSL demodulation, decoding and deframing.

Preferably, the PTN device and packet service transmission method of the present invention can be applied on a SHDSL (Symmetric High Bit Rate Digital Subscriber Line, single line pair high bit rate digital subscriber line) line.

SHDSL is a kind of DSL technology. It has the advantages of supporting two-way symmetrical services, good compatibility, high data transmission speed, and long transmission distance. It is mainly for small and medium-sized enterprises or business users.

The invention provides a method of integrating a SHDSL board on the PTN system equipment to realize the transmission of packet services through the SHDSL line, thereby meeting the requirements of operators who want to use the SHDSL line to carry packet transmission services.

In the embodiment of the present invention, the SHDSL board supports the adaptation of the Ethernet packet to AAL5, can complete the conversion of the Ethernet packet to the ATM cell, and then completes the encapsulation of the ATM cell into the DSL frame, thereby supporting the ATM service mode; SHDSL The board can also complete the EFM encapsulation of the Ethernet packet, and then encapsulate it into the DSL frame, thereby supporting the EFM service mode. Therefore, the SHDSL board in the embodiment of the present invention can support the SHDSL frame based on ATM and the SHDSL frame of EFM Two formats.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (11)

1. a grouping conveying network PTN equipment is characterized in that, comprises main system processing module and digital user wire DSL integrated circuit board, wherein:

Said main system processing module is used for the Ethernet bag that Packet Service is corresponding and sends to said DSL integrated circuit board, and receives the Ethernet bag that the DSL integrated circuit board transmits;

Said DSL integrated circuit board is used for the Ethernet bag that receives from the main system processing module is handled, and obtains the DSL signal that can on the DSL circuit, transmit, and sends on the DSL circuit and transmit; Obtain the Ethernet bag to handling, and send to said main system processing module from the DSL signal of DSL circuit.

2. equipment as claimed in claim 1 is characterized in that,

When the main system processing module defines the overload Ethernet bag transmission that exceeds DSL circuit bearing capacity, send the binding instruction to the DSL integrated circuit board;

The DSL integrated circuit board is according to the binding instruction that receives, and overload Ethernet bag cut into slices and the Ethernet bag after the section added carry out the Ethernet bag again and convert the DSL Signal Processing into after the section sign;

When the Ethernet bag that the DSL integrated circuit board obtains after confirming the DSL signal handled has the section sign, package according to the section sign, the Ethernet bag that will organize again after wrapping sends to said main system processing module.

3. according to claim 1 or claim 2 equipment is characterized in that said DSL integrated circuit board comprises: control module, logic module and DSL processing module, wherein,

Logic module is used under the control of control module, will carry out the relevant processing of service logic from the Ethernet bag that the main system processing module receives, and the Ethernet bag after will handling sends to the DSL processing module; The Ethernet bag that receives from the DSL processing module is carried out the relevant processing of service logic, the Ethernet bag after handling is sent to the main system processing module;

The DSL processing module is used under the control of control module, will convert into from the Ethernet bag that logic module receives to send to the DSL circuit behind the DSL signal and transmit; To be to send to said logic module behind the Ethernet bag from the DSL conversion of signals that the DSL circuit receives.

4. equipment as claimed in claim 3; It is characterized in that; Said control module is used for when receiving the binding instruction that the main system processing module sends, and control logic module sends to the DSL processing module through the overload Ethernet bag of designated port after with the service logic relevant treatment; Control DSL processing module is cut into slices to overload Ethernet bag and the Ethernet bag after the section is added and carries out the Ethernet bag again and convert the DSL Signal Processing into after the section sign.

5. like the said equipment of claim 3, it is characterized in that said DSL processing module specifically obtains the DSL signal through the Ethernet bag being carried out DSL framing, coding, modulation; Through the DSL signal is carried out the DSL rectification, decoding is conciliate framing and is obtained the Ethernet bag.

6. equipment as claimed in claim 3 is characterized in that, also comprises:

The DSL interface is used for being connected with the DSL circuit with the DSL processing module respectively parallel transmission DSL signal between DSL processing module and DSL circuit.

7. equipment as claimed in claim 6 is characterized in that,

Parallel transmission Ethernet bag between said logic module and DSL processing module, and the port number of parallel transmission Ethernet bag is consistent with the port number of parallel transmission DSL signal.

8. equipment as claimed in claim 3 is characterized in that,

Said logic module specifically is connected with said DSL processing module through Media Independent Interface;

Said DSL processing module comprises at least one DSL chip.

9. a packet service transmission method is characterized in that, comprising:

When sending Packet Service, the main system processing module Ethernet bag that Packet Service is corresponding sends to said DSL integrated circuit board;

Said DSL integrated circuit board will be handled from the Ethernet bag that the main system processing module receives, and obtain the DSL signal that can on the DSL circuit, transmit, and send on the DSL circuit and transmit;

When receiving Packet Service, the DSL integrated circuit board obtains the Ethernet bag to handling from the DSL signal of DSL circuit, and sends to the main system processing module; The main system processing module receives the Ethernet bag that the DSL integrated circuit board transmits.

10. method as claimed in claim 9 is characterized in that, when sending Packet Service, when the main system processing module defines the overload Ethernet bag transmission that exceeds DSL circuit bearing capacity, also comprises:

The main system processing module is sent integrated circuit board to DSL and is sent the binding instruction;

The DSL integrated circuit board is according to the binding instruction that receives, and overload Ethernet bag is cut into slices and carried out the Ethernet bag again and convert the DSL Signal Processing into after the section sign adding in the Ethernet bag after the section;

When the DSL integrated circuit board confirm to be handled the Ethernet bag that obtains and had the section sign, after packaging according to the section sign, the Ethernet bag that will organize again after wrapping sent to the main system processing module.

11. like claim 9 or 10 described methods, it is characterized in that,

The DSL integrated circuit board is handled the Ethernet bag, obtains the DSL signal that can on the DSL circuit, transmit, and specifically comprises:

The Ethernet bag that receives from the main system processing module is carried out the relevant processing of Packet Service logic;

Ethernet bag after handling is carried out DSL framing, coding, modulation obtain the DSL signal;

The DSL integrated circuit board obtains the Ethernet bag to handling from the DSL signal of DSL circuit, specifically comprises:

DSL signal from the DSL circuit is carried out DSL rectification, the processing of decoding reconciliation framing, obtain the Ethernet bag;

The Ethernet bag that obtains is carried out sending to the main system processing module after the Packet Service logic relevant treatment.

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