WO2012163189A1

WO2012163189A1 - Ptn device and packet service transmission method

Info

Publication number: WO2012163189A1
Application number: PCT/CN2012/074175
Authority: WO
Inventors: 马晓卫; 顾锋; 王春生
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-06-01
Filing date: 2012-04-17
Publication date: 2012-12-06
Also published as: CN102811156A

Abstract

Disclosed is a packet transport network (PTN) device, comprising a main system processing module and a digital subscriber line (DSL) card. The main system processing module is used for sending an Ethernet packet corresponding to a packet service to the DSL card and receiving an Ethernet packet transmitted from the DSL card. The DSL card is used for processing the Ethernet packet received from the main system processing module to obtain a DSL signal transmittable on a DSL line and sending the DSL signal to the DSL line for transmission; and processing a DSL signal from the DSL line to obtain an Ethernet packet and sending the Ethernet packet to the main system processing module. In the application where some network setup abroad is inconvenient so that it is necessary to lease DSL lines that have been set up by others, the present invention enables the operator to use this solution to bear services having low delay requirements such as HSDPA, thereby greatly saving the operator's cost.

Description

PTN device and packet service transmission method

The present invention relates to a DSL (Digital Subscriber Line) technology and a PTN (Packet Transport Network) technology, and more particularly to a PTN device and a packet service transmission method. Background technique

With the continuous development of communication technologies, telecommunication services are gradually becoming IP-based, and the services carried by the transmission network are mainly from TDM (Time Division Multiple Access) transmission to IP packet transmission. Due to the problem of insufficient bandwidth, delayed information and difficult network maintenance in the transmission network designed for TDM services, traditional transmission networks have been unable to meet the transmission requirements of IP packet services.

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

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

With the evolution of the traditional SDH network to the PTN network, the entire communication network has become complex and changeable, especially in foreign communication networks. In order to save costs, operators have more fully utilized existing resources. Not the entire network shown in Figure 1 uses the PTN network architecture. For services such as HSDPA (High Speed Downlink Packet Access) that are not very demanding for latency, various digital subscriber line xDSL networks and DSLAMs may be leased in the middle (Data Subscriber Line Access Mulitiplexer, digital subscribers). Line access multiplexer) devices are docked to carry this part of the service. In this case, the use of xDSL lines to carry packet transmission services has emerged.

However, there is currently no good solution for how to lease xDSL networks during packet service transmission. Summary of the invention

The present invention provides a PTN device and a packet service transmission method for satisfying the requirement that an operator uses an xDSL line to carry a packet transmission service during a transition period from an SDH network to a PTN network, and the present invention utilizes a large number of xDSL transmission networks that have been laid, fully The use of existing resources reduces the cost of networking.

To solve the above technical problem, the present invention provides a packet transfer network PTN device, including a main system processing module and a digital subscriber line DSL board, wherein:

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

The DSL board is configured to process an Ethernet packet received from the main system processing module to obtain a DSL signal that can be transmitted on the DSL line, and transmit the DSL signal to the DSL line for transmission; and process the DSL signal from the DSL line. An Ethernet packet is obtained and sent to the main system processing module.

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

When the packet service is sent, the main system processing module sends the Ethernet packet corresponding to the packet service to the DSL card;

The DSL card processes the Ethernet packet received from the main system processing module to obtain a DSL signal that can be transmitted on the DSL line, and transmits the DSL signal to the DSL line for transmission; When receiving the packet service, the DSL card 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 card.

The invention supports slicing and grouping processing of an Ethernet packet beyond the carrying capacity of the DSL line, and realizes the application of the DSL line to transmit the packet service, so that the operator can set up some networks in foreign countries is not very convenient, and the renting has already been set up by others. In the application of the DSL line, the solution is used to carry services such as HSDPA with low delay requirements, which greatly saves the operator's cost. DRAWINGS

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

2 is a structural diagram of a DSL board provided by the present invention;

FIG. 3 is a packet transmission network system provided by the present invention; FIG.

4 is a method for transmitting a packet service according to the present invention;

FIG. 5 is a method for receiving a packet service according to the present invention;

FIG. 6 is a DSL card processing method provided by the present invention. detailed description

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

The invention provides a packet transmission network PTN device, which can be realized by integrating a DSL board card on the PTN system device, wherein the PTN system device comprises a main system processing module, which can communicate with the DSL board. The working principle of the whole device is as follows: 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 capable of transmitting 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 sent to the main system processing module for processing.

By inserting a DSL board into the PTN system device, 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 networks in foreign countries. In an application that facilitates the leasing of a DSL line that has already been set up by others, the solution is used to carry services such as HSDPA with low latency requirements, which greatly saves the operator's cost.

At present, the existing PTN network can apply the E1 technology to transmit TDM services, but this only applies to the case where the entire network adopts the PTN network architecture. Preferably, when the packet transport network PTN device of the present invention is used, the main system processing module can The accessed TDM service is encapsulated into an Ethernet packet, which is then sent to the DSL card for DSL signal conversion processing.

Preferably, the main system processing module can send the Ethernet packet accessed by the U I interface (User Network Interface) of other existing boards in the PTN system device to the DSL card.

As shown in FIG. 2, the DSL card 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, where

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

Preferably, the control module 201 mainly comprises a CPU for communicating with the main system processing module, a CPLD for resetting and decoding each module on the DSL card, and a boot control module for starting the BOOT ROM, in the entire DSL card. After being inserted on the PTN system device, the control module 201 completes the startup, version loading, logical loading, and the like of the board, and communicates with the main system processing module to ensure the normal operation of the entire DSL board.

The logic module 202 is configured to be connected from the main system processing module under the control of the control module 201. The received Ethernet packet performs business logic related processing, and sends the processed Ethernet packet to

The DSL processing module 203: performs business logic related processing on the Ethernet packet received from the DSL processing module 203, and sends the processed Ethernet packet to the main system processing module.

Preferably, the logic module 202 distributes the Ethernet packets received from the main system processing module in parallel to the DSL processing module 203, and aggregates 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 service logic related processing on the Ethernet packet: encapsulating the OAM packet, used for operation and maintenance and management of the transmission device, and making the transmission more reliable, and encapsulating the 1588 clock synchronization protocol. Keep the clock and time between devices at both ends synchronized.

Preferably, logic module 202 is coupled to DSL processing module 203 using eight media independent interfaces.

The DSL processing module 203 is configured to convert the Ethernet packet received from the logic module 202 into a DSL signal and then transmit 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. It is then sent to the logic module 202.

Preferably, the processing of converting the Ethernet service into the DSL signal by the DSL processing module 203 includes a process of DSL framing, encoding, modulation, driving amplification, etc.; processing for converting the DSL signal into an Ethernet packet includes DSL demodulation, decoding, and deframing. .

Preferably, the DSL processing module 203 performs processing of parallel data by using two DSL chips, wherein each DSL chip supports processing of four DSL signals;

Preferably, DSL processing module 203 transmits the DSL signal over DSL interface 206. The clock module 204 is configured to provide a stable clock for the entire DSL board.

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

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

Preferably, the DSL interface 206 transmits the number of ports of the DSL signal in parallel with the logic module 202. The number of ports for transmitting Ethernet packets in parallel with the DSL processing module 203 is the same. For example, the DSL interface 206 uses an 8-way interface corresponding to the 8-way medium independent interface used by the logic module 202.

For the packet transport network PTN device in this embodiment, preferably, the main system processing module determines the Ethernet packet as an overload Ethernet packet when determining that the Ethernet packet exceeds the bearer capability of one or more DSL lines, and When it is determined that the overloaded Ethernet packet is sent, the binding instruction is sent to the control module 201 of the DSL card; when the control module 201 receives the binding instruction sent by the main system processing module, the control logic module 202 passes the service logic through the designated port. The related processed overload Ethernet packet is sent to the DSL processing module 203, and the control DSL processing module 203 slices the overloaded Ethernet packet, and adds a slice identifier to the sliced Ethernet packet, and then converts the Ethernet packet into a DSL. Signal processing.

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

The present invention provides a packet service transmission method, which is divided into two types: a transmission packet service direction and a reception packet service direction. The transmission packet service direction is as shown in FIG. 4, and includes the following steps: Step S401, a UI user interface of the PTN system device Access the Ethernet package.

Step S402, the main system processing module determines whether there is an Ethernet packet exceeding the carrying capacity of the DSL line. If not, step S403 is performed; otherwise, step S408 is performed.

Step S403: The main system processing module sends an Ethernet packet to the DSL board, and step 404 is performed. Step S404, the control module control logic module of the DSL board and the DSL processing module process the Ethernet packet, and step S405 is performed.

Step S405, the logic module receives the Ethernet packet from the main system processing module, and after performing the business logic related processing on the Ethernet packet, distributes the Ethernet packet to the DSL processing module in parallel, and performs step S406. Step S406, the DSL processing module receives the parallel Ethernet packet, converts and processes the DSL signal, and sends the DSL signal to the DSL interface.

Step S407, the DSL interface directly sends the DSL signal to the DSL line for transmission. Step S408, the main system processing module performs label generation on the overloaded Ethernet packet when determining that the overloaded Ethernet packet is sent, and sends a binding instruction to the control module to indicate that the overloaded Ethernet packet is sliced and grouped, and executed. Step S409.

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

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

Step S411, the logic module receives the overloaded Ethernet packet, performs the processing related to the service logic, and sends it to the DSL processing module through the designated port, and performs step S412.

Step S412, the DSL processing module performs slice processing on the overloaded Ethernet packet, and adds a slice identifier to the sliced Ethernet packet, and then converts the Ethernet packet into a DSL signal, and sends the packet to the DSL interface for execution. Step S413.

Step S413: The DSL interface sends the DSL signal to the DSL line for transmission.

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

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 directly sends the parallel Ethernet packet to the logic module.

Step S503: The logic module receives the parallel Ethernet packet from the DSL processing module, and after processing the service logic related to the Ethernet network packet, the parallel Ethernet packets are aggregated and sent to the main system processing module.

Step S504, the main system processing module receives the Ethernet packet, and performs service exchange, and sends the same to other existing boards of the PTN system device. Preferably, the main system processing module can specify the number of slices to slice the overloaded Ethernet packet and the number of DSL interfaces that can be used to bind the Ethernet packet after the packet is sent, and include the information in the control module. The binding instruction sent; when the control module receives the binding instruction, the overload processing instruction sent to the logic module includes information about which port of the overloaded Ethernet packet carrying the label is sent to the DSL processing module, and The slice processing instruction sent by the control module to the DSL processing module includes the following information: the port path of receiving the overloaded Ethernet packet, the number of times the overloaded Ethernet packet needs to be sliced, and the port binding of which DSL interfaces are used. Send the Ethernet packet after the package.

Preferably, the embodiment of the present invention adopts a DSL card processing as shown in FIG. 6 , wherein the logic module performs service logic related processing on the Ethernet packet, specifically, including an OAM packet encapsulated in the Ethernet packet and a 1588 clock synchronization protocol report. The processing of converting the Ethernet service into the DSL signal by the DSL processing module includes DSL framing, encoding, modulation, driving amplification, etc. The processing of converting the DSL signal into the Ethernet packet includes DSL demodulation, decoding, and de-framing.

Preferably, the PTN device and the packet service transmission method of the present invention can be applied to a SHDSL (Symmetric High Bit Rate Digital Subscriber Line) line.

SHDSL is one of the DSL technologies. It has the advantages of supporting two-way symmetric services, good compatibility, high data transmission speed, and long transmission distance. It is mainly for small and medium-sized enterprises or commercial users.

The present invention provides a method for realizing the transmission of packet services over an SHDSL line by integrating an SHDSL card on a PTN system device, thereby satisfying the operator's desire 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 the AAL5, and can complete the conversion of the Ethernet packet to the ATM cell, and then complete the ATM cell encapsulation into the DSL frame, encapsulate, and then package to the DSL. In the frame, thereby supporting the EFM service mode, therefore, the present invention The SHDSL board of the embodiment can support both the ATM-based SHDSL frame and the EFM SHDSL frame.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention Industrial applicability

The invention enables the operator to use some solutions in the foreign countries where the network setup is not very convenient and needs to rent a DSL line that has already been set up by others, and the solution is used to carry the service required by the low delay such as HSDPA, which greatly saves the cost of the operator. .

Claims

Claim

1. A packet transmission network PTN device, comprising a main system processing module and a digital subscriber line DSL board, wherein:

The DSL board is configured to process an Ethernet packet received from the main system processing module, obtain a DSL signal that can be transmitted on the DSL line, and transmit the DSL signal to the DSL line for transmission; and process the DSL signal from the DSL line. An Ethernet packet is obtained and sent to the main system processing module.

2. The apparatus according to claim 1, wherein

When the main system processing module determines that an overloaded Ethernet packet exceeding the carrying capacity of the DSL line is sent, the binding command is sent to the DSL board;

The DSL card performs slicing of the overloaded Ethernet packet according to the received binding command, and adds a slice identifier to the sliced Ethernet packet, and then converts the Ethernet packet into a DSL signal.

After determining that the Ethernet packet obtained by processing the DSL signal has a slice identifier, the DSL card performs grouping according to the slice identifier, and then sends the Ethernet packet after the packet to the main system processing module.

The device of claim 1 or 2, wherein the DSL card comprises: a control module, a logic module, and a DSL processing module, wherein

a logic module, configured to perform service logic related processing on the Ethernet packet received from the main system processing module under the control of the control module, and send the processed Ethernet packet to the DSL processing module; and receive from the DSL processing module The Ethernet packet performs business logic related processing, and sends the processed Ethernet packet to the main system processing module;

DSL processing module, used to receive the Ethernet from the logic module under the control of the control module The network packet is converted into a DSL signal and then transmitted to the DSL line for transmission; the DSL signal received from the DSL line is converted into an Ethernet packet and sent to the logic module.

The device according to claim 3, wherein the control module is configured to: when receiving the binding instruction sent by the main system processing module, control the logic module to process the service logic by using a designated port The packet is sent to the DSL processing module, and the control DSL processing module slices the overloaded Ethernet packet and adds a slice identifier to the sliced Ethernet packet, and then converts the Ethernet packet into a DSL signal.

The device of claim 3, wherein the DSL processing module obtains a DSL signal by performing DSL framing, encoding, and modulation on the Ethernet packet; and performing DSL demodulation, decoding, and framing the DSL signal to obtain an ether. Network package.

6. The device of claim 3, further comprising:

The DSL interface is used for respectively connecting with the DSL processing module and the DSL line, and transmitting the DSL signal in parallel between the DSL processing module and the DSL line.

7. The apparatus according to claim 6, wherein

The logic module and the DSL processing module transmit the Ethernet packet in parallel, and the number of ports for parallel transmission of the Ethernet packet is consistent with the number of ports for transmitting the DSL signal in parallel.

8. The apparatus according to claim 3, wherein

The logic module is specifically connected to the DSL processing module through a medium independent interface; the DSL processing module includes at least one DSL chip.

9. A packet service transmission method, the method comprising:

The DSL card processes the Ethernet packet received from the main system processing module to obtain a DSL signal that can be transmitted on the DSL line, and transmits the DSL signal to the DSL line for transmission;

When receiving packet services, the DSL board processes the DSL signal from the DSL line. The Ethernet packet is obtained and sent to the main system processing module; the main system processing module receives the Ethernet packet transmitted by the DSL board.

The method according to claim 9, wherein, when the packet processing service is sent, the main system processing module determines that the overloaded Ethernet packet exceeds the carrying capacity of the DSL line, and further includes: the main system processing module sends the card to the DSL Send a binding instruction;

When the Ethernet packet obtained by the DSL board is determined to have a slice identifier, the packet is grouped according to the slice identifier, and then the Ethernet packet after the packet is sent to the main system processing module.

11. The method of claim 9 or 10, wherein

The DSL board processes the Ethernet packet to obtain a DSL signal that can be transmitted on the DSL line, including:

Performing packet service logic related processing on the Ethernet packet received from the main system processing module; performing DSL framing, encoding, and modulation on the processed Ethernet packet to obtain a DSL signal; and processing the DSL signal from the DSL line by the DSL card Get the Ethernet package, including:

Perform DSL demodulation, decoding, and de-framing on the DSL signal from the DSL line to obtain an Ethernet packet;

The obtained Ethernet packet is subjected to packet service logic correlation processing and then sent to the main system processing module.