CN106130901B

CN106130901B - Data transmission method, device and system

Info

Publication number: CN106130901B
Application number: CN201610389242.3A
Authority: CN
Inventors: 生绪博; 杨佩林
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-06-03
Filing date: 2016-06-03
Publication date: 2020-04-03
Anticipated expiration: 2036-06-03
Also published as: CN106130901A

Abstract

A method of data transmission, comprising: a path computation client PCC sends a first service state parameter to a path computation element PCE by using a path computation element communication protocol PCEP; the PCC sends service performance statistic state parameters to the PCE by using the PCEP; and when the service performance statistic state parameter meets the Label Switching Path (LSP) adjustment condition, the PCC sends an LSP service adjustment request to the PCE, wherein the LSP service adjustment request is used for requesting the PCE to determine a target LSP. The embodiment of the invention also provides the PCC and the PCE. The embodiment of the invention can collect LSP related data needed for calculating the optimal path only by expanding PCEP without expanding a routing protocol when transmitting data, thereby simplifying the scheme.

Description

Data transmission method, device and system

Technical Field

The present invention relates to the field of network communication technologies, and in particular, to a method, an apparatus, and a system for data transmission.

Background

In a network structure based on a Path Computation Element (PCE), a PCE server is a functional entity responsible for Path Computation, and computes paths according to requests of a Path Computation Client (PCC) based on a known network topology and constraints.

The PCE Communication Protocol (PCEP) defines a process for dynamically adjusting a Label Switched Path (LSP). The PCE performs path computation according to a Traffic Engineering Database (Traffic Engineering Database, TED). The data in the TED is collected using a routing Protocol, which may be a Border Gateway Protocol (BGP) extended or an Interior Gateway Protocol (IGP) extended.

The PCE needs LSP service state parameters, LSP service performance statistical state data, Internet Protocol (IP) service state parameters, and IP service performance statistical state data when calculating the optimal path. When the PCE collects the service state parameters of the PCC, the PCE collects the LSP service state parameters and the IP service state parameters by using the PCEP, and collects the LSP service performance statistical state data and the IP service performance statistical state data by using the routing protocol. However, the above two protocols are used to collect data for calculating the optimal path, which easily results in a complex process for collecting data.

Disclosure of Invention

The application provides a method, a device and a system for data transmission. When data is transmitted, a routing protocol does not need to be expanded, and LSP related data needed for calculating the optimal path can be collected only by expanding PCEP, so that the scheme is simplified.

In view of the above, a first aspect provides a method for data transmission, including:

the PCC adopts PCEP to send a first service state parameter to the PCE, wherein the first service state parameter can be used for indicating whether the current service is established successfully or not;

in the invention, the PCC can adopt the PCEP to firstly send a first service state parameter to the PCE and then send the service performance statistic state parameter to the PCE, and can also adopt the PCEP to firstly send the service performance statistic state parameter to the PCE and then send the first service state parameter to the PCE;

when the PCC detects that the service performance statistical state parameter meets the LSP adjusting condition, the PCC sends an LSP service adjusting request to the PCE, wherein the PCE calculates a target LSP after receiving the LSP service adjusting request, and the target LSP is the optimal path corresponding to the current service.

When data is transmitted, all routing protocols do not need to be expanded, only PCEP is expanded, and relevant data used for calculating LSP can be collected, so that the scheme is simplified, and the realization of protocol standardization is facilitated by only adopting PCEP for data collection.

In a possible implementation manner, after the PCC sends the first traffic state parameter to the PCE, the method may further include:

the PCC can send a data synchronization completion signal to the PCE according to the convention between the PCC and the PCE, so that the synchronization condition of the current first service state parameter of the PCE is informed in time, and the reliability of the scheme is ensured.

In a possible implementation manner, when the service performance statistic state parameter satisfies the LSP adjustment condition, the step of the PCC sending an LSP service adjustment request to the PCE may include:

the PCC firstly needs to judge whether the service performance statistical state parameter detected by the PCC is larger than a threshold;

if the PCC determines that the service performance statistical state parameter is larger than the threshold, the PCC sends an LSP service adjustment request to the PCE, wherein the LSP service adjustment request is mainly used for enabling the PCE to calculate a target LSP;

and if the PCC determines that the service performance statistical state parameter is smaller than the threshold, the PCC sends a second service state parameter to the PCE, wherein the second service state parameter refers to the next service state parameter sent by the PCC, and the PCC sends the second service state parameter after the first service state parameter is sent.

If the service performance statistical state parameter is just equal to the threshold, the service performance statistical state parameter can be attributed to being larger than the threshold, or the service performance statistical state parameter is smaller than the threshold, but a rule under the condition of being equal to the threshold needs to be set in advance.

The PCC determines whether the LSP regulation condition is met by judging whether the service performance statistical state parameter is larger than the threshold, thereby providing an effective implementation mode for the invention and enhancing the feasibility of the scheme.

A second aspect provides a method of data transmission, comprising:

the PCE receives a first service state parameter sent by the PCC through the PCEP, wherein the first service state parameter can be used for indicating whether the current service is established successfully or not;

the PCE receives a first service performance statistical state parameter sent by the PCC through the PCEP, wherein the service performance statistical state parameter is used for representing a performance value of current service data;

when receiving an LSP service adjustment request sent by the PCC, the PCE needs to calculate a target LSP according to the received first service state parameter and the first service performance statistical state parameter, that is, the target LSP is the optimal path corresponding to the current service.

In a possible implementation manner, after the PCE receives the first service state parameter sent by the PCC, the method may further include:

and the PCE receives a data synchronization completion signal sent by the PCC after the PCC sends the first service state parameter according to the requirement negotiated between the PCE and the PCC in advance, so that the PCE can know the synchronization condition of the current first service state parameter in time, and the reliability of the scheme is ensured.

A third aspect provides a path computation client, comprising:

the first sending module is used for sending the first service state parameter to the PCE by adopting the PCEP;

the second sending module is used for sending the service performance statistical state parameter to the PCE by adopting the PCEP;

and a third sending module, configured to send an LSP service adjustment request to the PCE when the service performance statistic state parameter sent by the second sending module meets an LSP adjustment condition of a label switched path, where the LSP service adjustment request is used to request the PCE to determine a target LSP.

In one possible implementation, the path computation client may further include:

and the fourth sending module is used for sending a data synchronization completion signal to the PCE after the first sending module sends the first service state parameter to the PCE.

In one possible implementation manner, the third sending module is configured to:

judging whether the service performance statistic state parameter is larger than a threshold;

if the service performance statistic state parameter is larger than the threshold, sending an LSP service adjustment request to the PCE;

and if the service performance statistical state parameter is smaller than the threshold, sending a second service state parameter to the PCE.

A fourth aspect provides a path computation element, comprising:

the first receiving module is used for receiving a first service state parameter sent by the PCC;

the second receiving module is used for receiving the first service performance statistical state parameter sent by the PCC;

and the determining module is used for determining the target LSP according to the first service state parameter received by the first receiving module and the first service performance statistical state parameter received by the second receiving module when the PCE receives the LSP service adjustment request sent by the PCC.

In one possible implementation, the path computation element may further include:

and the third receiving module is used for receiving the data synchronization completion signal sent by the PCC after the first receiving module receives the first service state parameter sent by the PCC.

A fifth aspect provides a path computation client, comprising: a transceiver and a processor;

wherein the processor is configured to:

controlling a transceiver to send a first service state parameter to a PCE (packet core network element) by adopting PCEP (Primary control element protocol);

controlling a transceiver to send service performance statistical state parameters to a PCE by adopting PCEP;

and when the service performance statistical state parameter meets the LSP adjustment condition, the control transceiver sends an LSP service adjustment request to the PCE, wherein the LSP service adjustment request is used for requesting the PCE to determine the target LSP.

In one possible implementation, the processor is further configured to control the transceiver to send a data synchronization completion signal to the PCE.

In one possible implementation, the processor is configured to determine whether the service performance statistic state parameter is greater than a threshold;

if the service performance statistic state parameter is larger than the threshold, controlling the transceiver to send an LSP service adjustment request to the PCE;

and if the service performance statistic state parameter is smaller than the threshold, controlling the transceiver to send a second service state parameter to the PCE.

A sixth aspect provides a path computation element comprising: a transceiver and a processor;

the processor is configured to:

receiving a first service state parameter sent by PCC through a transceiver;

receiving a first service performance statistical state parameter sent by PCC through a transceiver;

and when receiving an LSP service adjustment request sent by the PCC, determining a target LSP according to the first service state parameter and the first service performance statistical state parameter.

In one possible implementation, the processor further controls the transceiver to receive a data synchronization completion signal transmitted by the PCC.

Drawings

Fig. 1 is a schematic diagram illustrating an embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an architecture for transmitting data via extended PCEP in an embodiment of the present invention

FIG. 3 is a schematic flow chart of data transmission by extended PCEP according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of PCC triggered LSP service adjustment according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of one embodiment of a PCC in accordance with an embodiment of the present invention;

FIG. 6 is a schematic diagram of another embodiment of a PCC in accordance with an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a PCE in the embodiment of the present invention;

FIG. 8 is another structural diagram of a PCE in the embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a PCC in accordance with an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a PCE in the embodiment of the present invention;

fig. 11 is a schematic diagram of an embodiment of a system for data transmission according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention provide a method, an apparatus, and a system for data transmission, which are used to collect relevant data for calculating an LSP by only expanding PCEP without expanding a routing protocol when transmitting data, thereby simplifying a scheme, and facilitating implementation of protocol standardization by only adopting PCEP for data collection.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

The embodiment of the invention is mainly applied to a network based on PCEP, and the PCEP is used for communication between PCE and PCC. The PCE may be a controller and the PCC may be a repeater.

The PCE may be located anywhere in the network, may be integrated within a network device (e.g., a Label Switching Router (LSR)), or may be a stand-alone device. The PCC and the PCE are communicated through the PCEP so as to submit a path computation request or obtain a path computation result. The PCC may be a Multiprotocol Label Switching (MPLS) network management device in the network, or a Generalized MPLS (GMPLS) network management device in the network, or an LSR.

The PCE may be applied in the following scenarios:

for example, path computation for multiple traffic engineering domains: when the cross-domain LSP is established, the router at the ingress has no global traffic engineering information, and the cross-domain LSP can only be established by the router at the egress, and at this time, it cannot be ensured that the established LSP is globally optimal. Then, the path can be calculated through the PCEs, and since the traffic engineering information can be exchanged between the PCEs through the PCEP, a globally optimized traffic engineering calculation result can be obtained.

The PCE of aspects of the present invention may be applied to the scenarios described above, as well as to other types of scenarios. Such as path computation, protection path computation, or multi-layer network path computation for a conventional network.

The application of the PCE in the network comprises a mode of internally arranging the PCE in the equipment, a mode of externally arranging an independent PCE, a PCE mode based on a network management system, a multi-PCE independent calculation mode, multi-PCE coordinated calculation and the like.

Referring to fig. 1, a method for data transmission according to an embodiment of the present invention is described as follows, where the method for data transmission according to the embodiment of the present invention includes:

101. the PCC adopts PCEP to send a first service state parameter to the PCE, and the PCE receives the first service state parameter sent by the PCC;

in a network employing PCEP, a PCE first establishes a session with a PCC, after which the two may communicate. The PCE functions like a controller and the PCC functions like a repeater, with communication between the two via PCEP.

PCEP, which is communicated between the PCE and the PCC, is primarily used to complete the sending of path computation requests and the receiving of path computation responses. And the PCEP communicated between PCEs is mainly used for completing automatic discovery between PCEs and synchronization of TEDs between PCEs, and is also used for path computation requests and responses in case of multi-PCE coordination.

When the PCE and the PCC communicate with each other, the PCC may send basic information of the service, i.e., the first service state parameter, to the PCE. The first service status parameter needs to include whether the service is successfully established, and may further include one or more of the following: bandwidth size, quality of service (QoS) requirements, and link reliability requirements.

102. The PCC adopts PCEP to send service performance statistical state parameters to the PCE, and the PCE receives first service performance statistical state parameters sent by the PCC;

the PCC may measure the traffic performance statistics state parameters through an operation, administration and maintenance (OAM) based protocol. And the PCC sends the service performance statistical state parameters to the PCE according to the message and the data model of the PCEP, namely the PCC sends the service performance statistical state parameters according to the PCEP.

Assuming that the PCE receives the service performance statistic status parameters sent by the PCC1 and the PCC2, the service performance statistic status parameters sent by the PCC1 to the PCE may include the following information:

service Type (English), for example, 0 indicates an IP Service Type;

a source IP address, which is an IP address of the PCC1 when the service type is an IP service;

a destination IP address, which is an IP address of the PCC2 when the service type is an IP service;

frame loss rate (English) of IP packets;

frame delay of IP packets (english);

frame jitter variation of IP packets (english).

When it is assumed that the PCE receives the service performance statistical state parameters sent by the PCC1 and the PCC2, establishes an LSP service between the PCC1 and the PCC2, and sends service data to the PCC2 by the PCC1, the service performance statistical state parameters synchronized by the PCC to the PCE may include the following information:

service Type (English), for example, 1 indicates the LSP Service Type;

LSR Identity (English: LSR Identity, LSR ID): when the service type is LSP service, the LSR is marked as ID of PCC 1;

an LSP identification (LSP ID) of the LSP traffic;

frame loss rate (in English) of LSP packets;

frame delay of LSP packet;

frame jitter variation (frame delay) of LSP packets.

Because the PCC1 and the PCC2 need to start the IP service before performing the LSP service, when the PCE calculates an LSP path for the LSP service, the PCE needs not only the service performance statistical state parameters related to the LSP, but also the service performance statistical state parameters related to the IP. The PCC should send the service performance statistic status parameters to the PCE, so that the PCE computes a corresponding LSP path according to the service performance statistic status parameters.

The PCC may send the traffic performance statistics state parameters to the PCE by augmenting the existing PCEP message. Referring to fig. 2, fig. 2 is a schematic diagram illustrating an architecture for transmitting data through an extended PCEP according to an embodiment of the present invention. After the PCEP is extended, a signaling extension protocol is obtained, and the PCE may synchronize service performance statistical state parameters in the PCC by using the signaling extension protocol.

Fig. 3 shows a process in which a PCE receives a service performance statistic state parameter sent by a PCC, and fig. 3 is a schematic diagram illustrating a flow of transmitting data through an extended PCEP in an embodiment of the present invention. And the PCC sends a service data synchronization message (PCRpt) to the PCE at intervals, wherein the PCRpt carries a first service state parameter and a synchronization Signal (SYNC). When the SYNC carried in the PCRpt is 1, it indicates that the first service state parameter is successfully sent, and in the next sending period, the PCC will continue to send the PCRpt to the PCE, where the PCRpt carries the second service state parameter and the SYNC, and similarly, in the subsequent steps, the PCC will periodically send the PCRpt to the PCE, and the PCRpt carries the service state parameter and the SYNC corresponding to each period.

When the PCRpt receives a response, it indicates that the current service state parameter may be abnormal, so the PCC sends a service state message (PCOamRpt) to the PCE, where the PCOamRpt carries the service performance statistical state parameter and the SYNC. It can be understood that the sending of the service performance statistics status parameter through one PCOamRpt in fig. 3 is only an illustration, and since the service performance statistics status parameter may contain more information, in practical application, the service performance statistics status parameter may be split into a plurality of parts to be sent through the PCOamRpt. When the SYNC carried in the PCOamRpt is 1, it indicates that the PCC has sent the service performance statistic state parameter to the PCE, and when the SYNC is 0, it indicates that the PCC has finished sending the service performance statistic state parameter.

103. And when the service performance statistical state parameter meets the LSP adjusting condition, the PCC sends an LSP service adjusting request to the PCE, wherein the LSP service adjusting request is used for requesting the PCE to determine the target LSP.

When the PCC perceives that the service state changes according to the service performance statistic state parameters, it may determine whether the service performance statistic state parameters satisfy preset LSP adjustment conditions, and if so, it needs to send an LSP service adjustment request to the PCE.

Assuming that the preset LSP adjustment condition is that the frame loss rate of the LSP data packet is greater than or equal to 5%, and the PCC detects that the frame loss rate of the LSP data packet in the current service performance statistic state parameter is 10%, then the PCC determines that the service performance statistic state parameter meets the preset LSP adjustment condition, that is, the PCC may send an LSP service adjustment request to the PCE.

Or assuming that the preset LSP adjustment condition is that the frame delay of the LSP packet is greater than or equal to 0.1 ms, and the PCC detects that the frame delay of the LSP packet in the current service performance statistic state parameter is 0.2 ms, then the PCC determines that the service performance statistic state parameter meets the preset LSP adjustment condition, i.e., the PCC can send an LSP service adjustment request to the PCE.

The PCC sends the LSP service adjustment request to the PCE, so that the PCE calculates a new LSP according to the LSP service adjustment request, the new LSP is called a target LSP, and the target LSP is more adaptive to the current LSP service.

104. When receiving the LSP service adjustment request sent by the PCC, the PCE determines a target LSP according to the first service state parameter and the first service performance statistic state parameter.

The PCE determines the target LSP according to the LSP service adjustment request, and can determine the LSP by adopting a Constrained Shortest Path First (CSPF). Specifically, the PCE determines the path of the LSP by querying information in the TED and running the CSPF algorithm. When calculating the shortest path of the network using the CSPF algorithm, certain constraints, such as bandwidth requirements, are also taken into account.

The PCE calculates the LSP through the mode, when the service performance statistical state parameters are transmitted, the PCE can collect the relevant data for calculating the LSP only by expanding PCEP without expanding various routing protocols, and therefore the scheme is simplified.

Optionally, after the PCC sends the first traffic state parameter to the PCE, the method may further include:

the PCC sends a data synchronization completion signal to the PCE, and the PCE receives the data synchronization completion signal sent by the PCC.

After the PCC sends the service performance statistics state parameters to the PCE, the PCC may send a data synchronization completion signal to the PCE, so that the PCE determines that the synchronization of the service performance statistics state parameters has been completed after receiving the data synchronization completion signal. The data synchronization completion signal can provide a reference signal for the device needing synchronization processing, and data is guaranteed to be transmitted or received stably and reliably.

After the PCC sends a data synchronization completion signal to the PCE, it indicates that the PCC has completed the start-up procedure, and may perform LSP adjustment.

And the data synchronization completion signal is used as the convention between the PCC and the PCE, and the current information synchronization state is informed in time, so that the reliability of the scheme is ensured.

Optionally, when the service performance statistic state parameter satisfies the LSP adjustment condition, the PCC sends an LSP service adjustment request to the PCE, which may include:

the PCC judges whether the service performance statistic state parameter is larger than a threshold;

if the service performance statistic state parameter is larger than the threshold, the PCC sends an LSP service adjustment request to the PCE;

and if the service performance statistical state parameter is smaller than the threshold, the PCC sends a second service state parameter to the PCE.

The specific step of the PCC sending the LSP service adjustment request to the PCE may be that the PCC determines the current service state change condition according to the service performance statistical state parameters. Assuming that the preset threshold is that the frame loss rate of the LSP data packet is equal to 5%, the PCC needs to determine whether the frame loss rate of the LSP data packet in the service performance statistics state parameters is greater than 5%, if the packet loss rate is greater than 5%, the PCC sends an LSP service adjustment request to the PCE, so that the PCE computes a new LSP to perform a service, and if the frame loss rate of the LSP data packet in the service performance statistics state parameters is less than 5%, the PCC continues to send a second service state parameter to the PCE, where the second service state parameter is similar to a parameter type included in the first service state parameter, and the second service state parameter needs to include whether the service is successfully established, and may further include one or more of the following: bandwidth size, QoS requirements, and link reliability requirements. Different from the first service state parameter, the timing sequence of sending the second service state parameter by the PCC is different from the timing sequence of sending the first service state parameter, and the second service state parameter is sent after the first service state parameter.

It should be noted that, when the service performance statistic state parameter is equal to the preset threshold, the step of sending the LSP service adjustment request to the PCE by the PCC may be executed, or the step of sending the second service state parameter to the PCE by the PCC may be executed, which is not limited herein.

Referring to fig. 4, fig. 4 is a schematic flow chart illustrating PCC triggered LSP service adjustment according to an embodiment of the present invention. As shown in the figure, if the PCC aware service performance statistic state parameter is greater than the threshold, the PCC sends an LSP service adjustment request to the PCE, specifically, the PCC sends a PCRpt to the PCE at a certain interval, where the PCRpt may also carry an LSP service adjustment request and a delegation instruction (delete), and when the delete carried in the PCRpt is 1, it indicates that the PCE is authorized to adjust the LSP service. After the PCE calculates the target LSP, the PCE sends a service data update message (PCUpd) to the PCC so that the PCC can update the originally adopted LSP to a better target LSP in time.

And if the PCC perceived service performance statistic state parameter is smaller than the threshold, the PCC continues to send the PCRpt to the PCE, wherein the PCRpt at the moment carries a second service state parameter, and so on, and each PCRpt can carry a service state parameter corresponding to a new period.

Referring to fig. 5, the PCC 20 in an embodiment of the present invention is described in detail below with reference to the PCC of the present invention:

a first sending module 201, configured to send a first service state parameter to a PCE by using PCEP;

a second sending module 202, configured to send the service performance statistic state parameter to the PCE by using PCEP;

a third sending module 203, configured to send an LSP service adjustment request to the PCE when the service performance statistic state parameter sent by the second sending module meets an LSP adjustment condition, where the LSP service adjustment request is used to request the PCE to determine a target LSP.

In this embodiment, the first sending module 201 sends the first service state parameter to the PCE by using PCEP, the second sending module 202 sends the service performance statistic state parameter to the PCE by using PCEP, and when the service performance statistic state parameter sent by the second sending module 202 satisfies the LSP adjustment condition, the third sending module 203 sends an LSP service adjustment request to the PCE, where the LSP service adjustment request is used to request the PCE to determine the target LSP.

Optionally, based on the embodiment corresponding to fig. 5, referring to fig. 6, the PCC 20 in the embodiment of the present invention may further include:

a fourth sending module 204, configured to send a data synchronization completion signal to the PCE after the first sending module sends the first service state parameter to the PCE.

Optionally, based on the embodiment corresponding to fig. 5 or fig. 6, the third sending module 203 is configured to determine whether the service performance statistic state parameter is greater than a threshold, send an LSP service adjustment request to the PCE if the service performance statistic state parameter is greater than the threshold, and send a second service state parameter to the PCE if the service performance statistic state parameter is less than the threshold.

In the following description of the PCE in the present invention, referring to fig. 7, a PCE 30 in an embodiment of the present invention includes:

a first receiving module 301, configured to receive a first service state parameter sent by the PCC;

a second receiving module 302, configured to receive a first service performance statistic state parameter sent by the PCC;

a determining module 303, configured to, when the PCE receives an LSP service adjustment request sent by the PCC, determine a target LSP according to the first service state parameter received by the first receiving module and the first service performance statistic state parameter received by the second receiving module.

In this example. The first receiving module 301 receives a first service state parameter sent by the PCC, the second receiving module 302 receives a first service performance statistic state parameter sent by the PCC, and when the PCE receives an LSP service adjustment request sent by the PCC, the determining module 303 determines the target LSP according to the first service state parameter received by the first receiving module and the first service performance statistic state parameter received by the second receiving module.

The invention is used for collecting the relevant data for calculating the LSP only by expanding PCEP without expanding all routing protocols when transmitting data, simplifies the scheme, and is beneficial to realizing protocol standardization by only adopting PCEP to collect data.

Optionally, based on the above-mentioned embodiment corresponding to fig. 7, referring to fig. 8, the PCE 30 in the embodiment of the present invention may further include:

a third receiving module 304, configured to receive, by the first receiving module, a data synchronization completion signal sent by the PCC after the first receiving module receives the first service state parameter sent by the PCC.

Fig. 9 is a schematic structural diagram of a PCC 40 in accordance with an embodiment of the present invention. The PCC may include a transceiver 410, a processor 420, and a memory 430. Wherein. The transceiver 410 may include an input port and an output port.

The input port is the physical link and the ingress of the input packet. Ports are typically provided by line cards, one line card typically supporting 4, 8 or 16 ports, with one input port having many functions. The first function is to perform encapsulation and decapsulation of the data link layer. The second function is to look up the destination address of the incoming packet in the forwarding table to determine the destination port (called route lookup), which can be implemented using general hardware or by embedding a microprocessor on each line card. Third, to improve QoS, ports are divided into several predefined service levels for received packets. Fourth, the port may need to run a network-level protocol such as a serial line internet protocol, a point-to-point protocol, a data link-level protocol, or a point-to-point tunneling protocol. Once the route lookup is complete, the switch must be used to route the packet to its output port. If the PCC is input-queued, several inputs share the same switch. The last function of such an input port is to participate in an arbitration protocol for a common resource, such as a switch.

The swap switch can be implemented using a number of different technologies. The most used switch technologies to date are buses, crossbars and shared memory. The simplest switch uses one bus to connect all input and output ports, and a disadvantage of the bus switch is that its switching capacity is limited by the capacity of the bus and the additional overhead that is incurred for shared bus arbitration. A crossbar providing multiple data paths through switches, a crossbar having N x N crosspoints can be considered as having 2N buses, N being a positive integer greater than or equal to 1. If one of the crossovers is closed, data on the input bus is available on the output bus, otherwise it is not available. The closing and opening of the crosspoints is controlled by a scheduler.

The output port stores the packets before they are sent to the output link, allowing complex scheduling algorithms to be implemented to support priority requirements and the like. Like the input ports, the output ports also need to be able to support data link layer encapsulation and decapsulation, as well as many higher level protocols.

The PCC can support various interface types, and the universality of the PCC is embodied. Common types of interfaces are: a universal serial interface, a 10-mega ethernet interface, a fast ethernet interface, an adaptive ethernet interface, a gigabit ethernet interface, an Asynchronous Transfer Mode (ATM) interface, a token ring interface, an Integrated Services Digital Network (ISDN) interface, and the like.

The processor 420 may be a Central Processing Unit (CPU) or a combination of a CPU and a hardware chip. Usually, in the middle and low end routers, the CPU is responsible for exchanging routing information, routing table lookup, and forwarding data packets. In the above PCC, the CPU capability directly affects the throughput and route computation capability of the PCC. In high-end PCC, packet forwarding and table lookup are usually performed by an application-specific integrated circuit (ASIC) chip, and the CPU only implements a routing protocol, calculates a route, and distributes a routing table. Due to the development of technology, much of the work in routers can be done in hardware.

The memory 430 may include volatile memory (RAM), such as random-access memory (RAM); the memory may also include a non-volatile memory (ROM), such as a read-only memory (ROM), a flash memory (flash memory), a hard disk (HDD) or a solid-state drive (SSD); the memory may also comprise any combination of the above kinds of memories. The memory 430 serves to store the contents of the configuration, PCC operating system, routing protocol software, etc. The routing tables may also be stored in memory 430 where the various components of the PCC may be coupled together via bus system 440.

In the embodiment of the present invention, the processor 420 is configured to:

controlling the transceiver 410 to send a first traffic state parameter to the PCE using PCEP;

the control transceiver 410 sends the service performance statistic state parameters to the PCE by adopting PCEP;

when the service performance statistic state parameter satisfies the LSP adjustment condition, the control transceiver 410 sends an LSP service adjustment request to the PCE, where the LSP service adjustment request is used to request the PCE to determine the target LSP.

Optionally, the processor 420 is further configured to:

the control transceiver 410 sends a data synchronization complete signal to the PCE.

Optionally, the processor 420 is further configured to:

if the service performance statistic state parameter is greater than the threshold, controlling the transceiver 410 to send an LSP service adjustment request to the PCE;

if the service performance statistic state parameter is smaller than the threshold, the transceiver 410 is controlled to send a second service state parameter to the PCE.

Fig. 10 is a schematic structural diagram of a PCE 50 of an embodiment of the present invention. The PCE may include a transceiver 510, a processor 520, and a memory 530. The output device in the embodiments of the present invention may be a display device.

Memory 530 may include volatile memory, such as RAM; the memory may also include a nonvolatile memory such as a ROM, a flash memory, an HDD, or an SSD; the memory may also comprise any combination of the above kinds of memories. The memory 530 serves to store the contents of configuration, PCE operating system, routing protocol software, and the like. The routing table may also be stored in memory 530, and the various components of the PCE may be coupled together via a bus system 540.

Memory 530 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:

and (3) operating instructions: including various operational instructions for performing various operations.

Operating the system: including various system programs for implementing various basic services and for handling hardware-based tasks.

In this embodiment of the present invention, processor 520 is configured to:

receiving, by the transceiver 510, a first service state parameter sent by the PCC;

receiving, by the transceiver 510, a first service performance statistic state parameter sent by the PCC;

Optionally, the processor 520 is further configured to:

the data synchronization completion signal transmitted by the PCC is received through the transceiver 510.

Processor 520 controls the operation of the PCE, and processor 520 may also be referred to as a CPU. In a particular application, the various components of the PCE are coupled together by a bus system 540, wherein bus system 540 may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 540 in the figures.

The method disclosed in the above embodiments of the present invention may be applied to the processor 520, or implemented by the processor 520. The processor 520 may be a CPU or a combination of a CPU and a hardware chip.

The related description of fig. 10 can be understood with reference to the related description and effects of the method portion of fig. 1, and will not be described in detail herein.

Referring to fig. 11, a data transmission system according to an embodiment of the present invention is described below, where the data transmission system includes:

a PCC601 and a PCE 602;

the PCC601 sends the first service state parameter to the PCE602 by using PCEP, the PCC601 sends the service performance statistic state parameter to the PCE602 by using PCEP, and when the service performance statistic state parameter meets the LSP adjustment condition, the PCC601 sends an LSP service adjustment request to the PCE602, where the LSP service adjustment request is used to request the PCE602 to determine a target LSP.

PCE602 receives the first service state parameter sent by PCC601, PCE602 receives the first service performance statistic state parameter sent by PCC601, and when PCE602 receives an LSP service adjustment request sent by PCC601, PCE602 determines a target LSP according to the first service state parameter and the first service performance statistic state parameter.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on a plurality of network devices. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based upon such an understanding, all or part of the technical solutions of the present invention may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a Universal Serial Bus flash drive, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the scope of the claims.

Claims

1. A method of data transmission, comprising:

a path computation client PCC adopts a path computation element communication protocol PCEP to send a first service state parameter and a first synchronization signal to a path computation element PCE, wherein the first synchronization signal is used for indicating the sending condition of the first service state parameter in a period;

when the first synchronization signal indicates that the first service state parameter is abnormal, the PCC sends a service performance statistic state parameter and a second synchronization signal to the PCE by using PCEP, wherein the service performance statistic state parameter comprises a service type, a source Internet Protocol (IP) address and a destination IP address, and the second synchronization signal is used for indicating the sending condition of the service performance statistic state parameter;

and when the service performance statistic state parameter meets the Label Switching Path (LSP) adjustment condition, the PCC sends an LSP service adjustment request to the PCE, wherein the LSP service adjustment request is used for requesting the PCE to determine a target LSP.

2. The method of claim 1, wherein after the PCC sends a first traffic state parameter to a PCE, the method further comprises:

and the PCC sends a data synchronization completion signal to the PCE.

3. The method of claim 1 or 2, wherein when the traffic performance statistics state parameter satisfies an LSP adjustment condition, the PCC sends an LSP traffic adjustment request to the PCE, comprising:

the PCC judges whether the service performance statistical state parameter is larger than a threshold;

if the service performance statistic state parameter is larger than the threshold, the PCC sends the LSP service adjustment request to the PCE;

and if the service performance statistic state parameter is smaller than the threshold, the PCC sends a second service state parameter to the PCE.

4. A method of data transmission, comprising:

a Path Computation Element (PCE) receives a first service state parameter and a first synchronization signal sent by a Path Computation Client (PCC), wherein the first synchronization signal is used for indicating the sending condition of the first service state parameter in a period;

when the first synchronization signal indicates that the first service state parameter is abnormal, the PCE receives a service performance statistic state parameter and a second synchronization signal sent by the PCC, wherein the service performance statistic state parameter comprises a service type, a source Internet Protocol (IP) address and a destination IP address, and the second synchronization signal is used for indicating the sending condition of the service performance statistic state parameter;

and when the PCE receives a Label Switching Path (LSP) service adjustment request sent by the PCC, the PCE determines a target LSP according to the first service state parameter and the service performance statistic state parameter.

5. The method of claim 4, wherein after the PCE receives the first traffic state parameter sent by the PCC, the method further comprises:

and the PCE receives a data synchronization completion signal sent by the PCC.

6. A path computation client, comprising:

a first sending module, configured to send a first service state parameter and a first synchronization signal to a path computation element PCE by using a path computation element communication protocol PCEP, where the first synchronization signal is used to indicate a sending condition of the first service state parameter in a period;

a second sending module, configured to send, when the first synchronization signal indicates that the first service state parameter is abnormal, a service performance statistic state parameter and a second synchronization signal to the PCE by using PCEP, where the service performance statistic state parameter includes a service type, a source internet protocol IP address, and a destination IP address, and the second synchronization signal is used to indicate a sending condition of the service performance statistic state parameter;

a third sending module, configured to send an LSP service adjustment request to the PCE when the service performance statistic state parameter sent by the second sending module meets a Label Switched Path (LSP) adjustment condition, where the LSP service adjustment request is used to request the PCE to determine a target LSP.

7. The path computation client of claim 6, wherein the path computation client further comprises:

and the fourth sending module is configured to send a data synchronization completion signal to the PCE after the first sending module sends the first service state parameter to the PCE.

8. The path computation client according to claim 6 or 7, wherein the third sending module is configured to:

judging whether the service performance statistical state parameter is larger than a threshold;

if the service performance statistic state parameter is larger than the threshold, sending the LSP service adjustment request to the PCE;

9. A path computation element, comprising:

a first receiving module, configured to receive a first service state parameter and a first synchronization signal sent by a PCC, where the first synchronization signal is used to indicate a sending condition of the first service state parameter in a period;

a second receiving module, configured to receive, when the first synchronization signal indicates that the first service state parameter is abnormal, a service performance statistic state parameter and a second synchronization signal sent by the PCC, where the service performance statistic state parameter includes a service type, a source internet protocol IP address, and a destination IP address, and the second synchronization signal is used to indicate a sending condition of the service performance statistic state parameter;

a determining module, configured to determine, when the PCE receives a label switched path LSP service adjustment request sent by the PCC, a target LSP according to the first service state parameter received by the first receiving module and the service performance statistic state parameter received by the second receiving module.

10. The path computation element of claim 9, wherein the path computation element further comprises:

a third receiving module, configured to receive, after the first receiving module receives the first service state parameter sent by the PCC, a data synchronization completion signal sent by the PCC.

11. A path computation client, comprising: a transceiver and a processor;

wherein the processor is configured to:

controlling the transceiver to send a first service state parameter and a first synchronization signal to a Path Computation Element (PCE) by adopting a path computation element communication protocol (PCEP), wherein the first synchronization signal is used for indicating the sending condition of the first service state parameter in a period;

when the first synchronization signal indicates that the first service state parameter is abnormal, controlling the transceiver to send a service performance statistic state parameter and a second synchronization signal to the PCE by adopting PCEP, wherein the service performance statistic state parameter comprises a service type, a source Internet Protocol (IP) address and a destination IP address, and the second synchronization signal is used for indicating the sending condition of the service performance statistic state parameter;

and when the service performance statistic state parameter meets the Label Switching Path (LSP) adjustment condition, controlling the transceiver to send an LSP service adjustment request to the PCE, wherein the LSP service adjustment request is used for requesting the PCE to determine a target LSP.

12. The path computation client of claim 11,

the processor is further configured to control the transceiver to send a data synchronization completion signal to the PCE.

13. The path computation client of claim 11 or 12,

the processor is used for judging whether the service performance statistical state parameter is larger than a threshold;

if the service performance statistic state parameter is larger than the threshold, controlling the transceiver to send the LSP service adjustment request to the PCE;

14. A path computation element, comprising: a transceiver and a processor;

the processor is configured to:

receiving, by the transceiver, a first service state parameter and a first synchronization signal sent by a PCC, where the first synchronization signal is used to indicate a sending condition of the first service state parameter in a period;

when the first synchronization signal indicates that the first service state parameter is abnormal, receiving a service performance statistic state parameter and a second synchronization signal sent by the PCC through the transceiver, wherein the service performance statistic state parameter comprises a service type, a source Internet Protocol (IP) address and a destination IP address, and the second synchronization signal is used for indicating the sending condition of the service performance statistic state parameter;

and when receiving a Label Switching Path (LSP) service adjustment request sent by the PCC, determining a target LSP according to the first service state parameter and the service performance statistical state parameter.

15. The path computation element of claim 14,

the processor is further configured to receive, by the transceiver, a data synchronization completion signal sent by the PCC.