CN111683306B - Multi-service hybrid access method and device - Google Patents

Multi-service hybrid access method and device Download PDF

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Publication number
CN111683306B
CN111683306B CN202010430425.1A CN202010430425A CN111683306B CN 111683306 B CN111683306 B CN 111683306B CN 202010430425 A CN202010430425 A CN 202010430425A CN 111683306 B CN111683306 B CN 111683306B
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service
mapping
service type
otuk
packet
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CN111683306A (en
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倪文娟
王雪
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Fiberhome Telecommunication Technologies Co Ltd
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Fiberhome Telecommunication Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

Abstract

The embodiment of the invention provides a multi-service mixed access method and a device, wherein the method comprises the following steps: identifying the service type of the received cell data packet, and extracting the minimized bearing particles corresponding to the service type; and mapping the minimized bearer granule corresponding to the service type into an optical path transport unit (OTUk) by adopting a mapping mode corresponding to the service type so as to send the OTUk to an Optical Transport Network (OTN). According to the multi-service hybrid access method and device provided by the embodiment of the invention, the accessed service type is identified, the minimized load-bearing particles of the service type are adopted for scheduling, the scheduling result is directly mapped to the OTUk interface, the network level is simplified, the network delay is reduced, the scheduling process is adaptive to various service access scenes, and the flexibility is higher.

Description

Multi-service hybrid access method and device
Technical Field
The present invention relates to the field of optical communication technologies, and in particular, to a multi-service hybrid access method and apparatus.
Background
In a conventional Optical Transport Network (OTN) device, there are three main ways for a Synchronous Digital Hierarchy (SDH), a Packet Transport Network (Packet Transport Network), and other services to access the OTN.
The first is mapping into the optical channel payload unit OPUk by Constant Bit Rate (CBR), for example: CBR2G5-2488320kbit/s + -20 ppm constant bit rate signal, such as STM-16, CBR10G-9953280kbit/s + -20 ppm constant bit rate signal, such as STM-64, CBR40G-39813120kbit/s + -20 ppm constant bit rate signal, such as STM-256, and the mapping can be performed in an asynchronous mode and a bit synchronization mode.
The second is mapping into OPUk by Asynchronous Transfer Mode (ATM) signals, specifically by multiplexing ATM cells into a fixed bit stream that matches the payload capacity of OPUk, mapping into OPUk, and adjusting the rate by inserting idle cells or dropping cells during multiplexing.
The third is the mapping of Generic Framing Procedure (GFP) frame signals into OPUk, specifically by inserting idle frames during the packing phase to achieve a continuous bit stream matching OPUk and scrambling in the process.
However, the three existing technologies all provide a manner of directly mapping the service signal to the OPUk, and then transmitting the service signal to the OTN network for transmission, and implement service cross scheduling by scheduling the OPUk, where the smallest scheduling granule is OPU 0. However, this method has the problems of low bandwidth utilization and inflexible scheduling for low-rate service access. For example: the SDH service STM-4(622Mbps) is mapped to an OPU0(1.25Gbps) through an AMP, and the bandwidth utilization rate is reduced by half by scheduling based on an OPU 0. Therefore, there is a need for a multi-service hybrid access method to solve the above problems.
Disclosure of Invention
In order to solve the above problems, embodiments of the present invention provide a multi-service hybrid access method and apparatus that overcome the above problems or at least partially solve the above problems.
In a first aspect, an embodiment of the present invention provides a multi-service hybrid access method, including:
identifying the service type of the received cell data packet, and extracting the minimized bearing particles corresponding to the service type;
and mapping the minimized bearer granule corresponding to the service type into an optical path transport unit (OTUk) by adopting a mapping mode corresponding to the service type so as to send the OTUk to an Optical Transport Network (OTN).
Before the identifying the service type of the received cell data packet, the method further comprises:
and based on a preset unified cell packaging format, packaging all service signals into the cell data packet by using the minimum bearing particles contained in the service type corresponding to the service signals.
Before encapsulating all service signals into the cell data packet with the minimum bearer particles included in the service type corresponding to the service signals based on the preset unified cell encapsulation format, the method further includes:
and adding preset frame headers of the service types of the cell data packets for all the cell data packets.
Wherein, the identifying the service type of the received cell data packet includes:
and identifying a preset frame header of the received cell data packet to determine the service type of the cell data packet.
Wherein, the service types at least include an optical path data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and accordingly:
when the service type is an ODUk service, mapping the minimized bearer granule corresponding to the service type to an optical transport unit OTUk, so as to send the optical transport unit OTUk to an optical transport network OTN, including:
converging the low-order ODUk signals into high-order ODUk signals;
and mapping the high-order ODUk signal into the OTUk to be sent to an optical transport network OTN.
When the service type is a packet network service, mapping the minimized bearer granule corresponding to the service type to an optical transport unit OTUk for sending to an optical transport network OTN includes:
mapping the packet service signal into an ODUk frame format signal;
and mapping the ODUk frame format signal into the OTUk to be sent to an optical transport network OTN.
When the service type is an SDH service, mapping the minimized bearer granule corresponding to the service type to an optical transport unit OTUk to be sent to an optical transport network OTN includes:
decoding VCn particles from the VCn encapsulation packets of the SDH service signals;
mapping the VCn particles into an N-level STM-N structure of a synchronous transmission module;
mapping the STM-N structure into an ODUk frame format signal;
and mapping the ODUk frame format signal into the OTUk to be sent to an optical transport network OTN.
A second aspect of the present invention further provides a multi-service hybrid access apparatus, including:
the packet cutting and unpacking module is used for identifying the service type of the received cell data packet and extracting the minimum carrying particles corresponding to the service type;
and the service processing module is used for mapping the minimized load-bearing particles corresponding to the service types into an optical path transport unit OTUk by adopting a mapping mode corresponding to the service types so as to send the OTUk to an optical transport network OTN.
Wherein the apparatus further comprises:
and the first group of packet modules are used for encapsulating all service signals into the cell data packets according to the minimum carrying particles contained in the service types corresponding to the service signals based on a preset unified cell encapsulation format.
Wherein the apparatus further comprises:
and the second group of packet modules are used for adding preset frame headers of the service types of the cell data packets for all the cell data packets.
Wherein, the package cutting and unpacking module is specifically used for:
and identifying a preset frame header of the received cell data packet to determine the service type of the cell data packet.
The service types at least include a service and optical channel data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and correspondingly, when the service types are the ODUk service, the service processing module is specifically configured to:
converging the low-order ODUk signals into high-order ODUk signals;
and mapping the high-order ODUk signal into the OTUk to be sent to an optical transport network OTN.
The service types at least include a service and optical path data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and correspondingly, when the service types are the packet network service, the service processing module is specifically configured to:
mapping the packet service signal into an ODUk frame format signal;
and mapping the ODUk frame format signal into the OTUk to be sent to an optical transport network OTN.
The service types at least include a service and optical path data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and correspondingly, when the service types are the SDH service, the service processing module is specifically configured to:
decoding VCn particles from the VCn encapsulation packets of the SDH service signals;
mapping the VCn particles into an N-level STM-N structure of a synchronous transmission module;
mapping the STM-N structure into an ODUk frame format signal;
and mapping the ODUk frame format signal into the OTUk to be sent to an optical transport network OTN.
Third aspect an embodiment of the present invention provides an electronic device, including:
a processor, a memory, a communication interface, and a bus; the processor, the memory and the communication interface complete mutual communication through the bus; the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the multi-service hybrid access method.
A fourth aspect of the present invention provides a non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the multi-service hybrid access method described above.
According to the multi-service hybrid access method and device provided by the embodiment of the invention, the accessed service type is identified, the minimized load-bearing particles of the service type are adopted for scheduling, the scheduling result is directly mapped to the OTUk interface, the network level is simplified, the network delay is reduced, the scheduling process is adaptive to various service access scenes, and the flexibility is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a multi-service hybrid access method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a multi-service hybrid access device according to an embodiment of the present invention;
fig. 3 is a block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of a multi-service hybrid access method provided by an embodiment of the present invention, as shown in fig. 1, including:
101. identifying the service type of the received cell data packet, and extracting the minimized bearing particles corresponding to the service type;
102. and mapping the minimized bearer granule corresponding to the service type into an optical path transport unit (OTUk) by adopting a mapping mode corresponding to the service type so as to send the OTUk to an Optical Transport Network (OTN).
It should be noted that the main execution body in the embodiment of the present invention is a line processing unit in an OTN transmission device, and may be specifically represented by a line board card arranged in an OTN optical transmission network, where the function of the board card is to implement hybrid access of services, or other entity or virtual module capable of implementing the function is also applicable to the embodiment of the present invention.
It can be understood that, in the service scheduling process in the OTN, cross scheduling processing is generally adopted, and then the service scheduling process is sent to the board provided in the embodiment of the present invention to perform service hybrid access transmission, specifically, in step 101, when the board receives a cell data packet, a service type to which the cell data packet belongs is identified, the cell data packet is generally sent through a switching module in the OTN, and after the type of the cell data packet is determined, the embodiment of the present invention unpacks the cell data packet to extract service minimized bearer particles corresponding to the cell data packet, it can be understood that service minimized bearer particles corresponding to different service types are different, for example: the traffic minimization bearer granule in the SDH traffic is a VCn granule.
Further, in step 102, after determining the service type of the cell data packet, the embodiment of the present invention performs mapping by using a mapping manner corresponding to the service type, it can be understood that the mapping manner is preset, different service types automatically determine the service mapping manner corresponding to the service type, and then map the minimized granular signal obtained by decapsulating in step 101 to a standard customer service frame format according to the mapping manner. It should be noted that, in the embodiment of the present invention, all access services are finally mapped to an OTUk interface, and thus, in a process of mapping a minimized bearer granule to an optical access transport unit OTUk, mapping processing of a non-ODUk client service to an ODUk, and multiplexing processing of a low-order ODUk convergence to a high-order ODUk may be involved.
It can be understood that the access transmission process of the service is essentially a bidirectional signal flow transmission process of the service signal, and the reverse packet packing, encapsulation, demapping, and demultiplexing processes can be reversely pushed by directly referring to the forward process, and the embodiments of the present invention are not described herein again.
According to the multi-service hybrid access method provided by the embodiment of the invention, the accessed service type is identified, the minimized load-bearing particles of the service type are adopted for scheduling, the scheduling result is directly mapped to the OTUk interface, the network level is simplified, the network delay is reduced, the scheduling process is adaptive to various service access scenes, and the flexibility is higher.
On the basis of the above embodiment, before the identifying the service type to which the received cell packet belongs, the method further includes:
and based on a preset unified cell packaging format, packaging all service signals into the cell data packet by using the minimum bearing particles contained in the service type corresponding to the service signals.
As can be seen from the content of the foregoing embodiment, the embodiment of the present invention can map various types of services in a mixed manner onto an OTUk, so as to access a core aggregation network for large-capacity long-distance transmission, and it can be understood that the transmission of service signal flows in the embodiment of the present invention is a bidirectional process, and in addition to the packet cutting and decapsulating process related in the foregoing embodiment, the transmission of service signal flows should also include a corresponding packet packaging and encapsulating process.
In the embodiment of the present invention, preferably, for the packet packaging process, the embodiment of the present invention encapsulates the minimum bearer particle of any service by using a uniform cell format based on a uniform cell switching platform, and performs service hybrid transmission through cross scheduling processing.
On the basis of the above embodiment, before encapsulating all service signals into the cell data packet with the minimum bearer particle included in the service type corresponding to the service signal based on the preset unified cell encapsulation format, the method further includes:
and adding preset frame headers of the service types of the cell data packets for all the cell data packets.
As can be seen from the content of the foregoing embodiment, the function to be implemented in the embodiment of the present invention is to perform hybrid transmission for each type of service, and in order to distinguish the cell data packet represented by each service type, preferably, the embodiment of the present invention adopts a method of adding a frame header to the cell data packet to indicate the service type of the cell data packet. It can be understood that the frame headers corresponding to different service types are different, for example: the frame header of the SDH service may be set to 1, the frame header of the packet service may be set to 2, and so on.
On the basis of the above embodiment, the identifying the service type to which the received cell packet belongs includes:
and identifying a preset frame header of the received cell data packet to determine the service type of the cell data packet.
It can be known from the content of the above embodiment that, in the packet packaging process, in order to distinguish the service types of the cell data packets, the embodiment of the present invention adds a frame header for identifying the service type to each cell data packet, so that when correspondingly identifying the cell data packet, the service type of the cell data packet can be determined only by reading the frame header.
On the basis of the foregoing embodiment, the service types at least include a service and an optical channel data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and correspondingly, when the service type is the ODUk service, the mapping, to an optical channel transport unit OTUk, the minimum bearer granule corresponding to the service type, so as to send the optical channel transport unit OTUk to an optical transport network OTN includes:
converging the low-order ODUk signals into high-order ODUk signals;
and mapping the high-order ODUk signal into the OTUk to be sent to an optical transport network OTN.
As can be seen from the content of the foregoing embodiment, the embodiment of the present invention may perform mapping according to different service types by using different mapping manners, and conventional service types may be roughly classified into three types, that is, an ODUk service, a packet network service, and an SDH service.
Specifically, for the ODUk service, the service minimization bearer particle is a low-order ODUk signal, and the embodiment of the present invention directly converges the low-order ODUk to the high-order ODUk signal, and then maps the ODUk signal to the OTUk signal, which is sent to the OTN optical transmission network. It should be noted that, in the embodiment of the present invention, the service signal flow is bidirectional, and can be directly obtained by reverse inverse extrapolation in the inverse demultiplexing and demapping processes, which is not described in detail herein.
On the basis of the foregoing embodiment, the service types at least include a service and an optical channel data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and correspondingly, when the service type is the packet network service, the mapping, to an optical channel transport unit OTUk, the minimum bearer granule corresponding to the service type is mapped to be sent to an optical transport network OTN, where the mapping includes:
mapping the packet service signal into an ODUk frame format signal;
and mapping the ODUk frame format signal into the OTUk to be sent to an optical transport network OTN.
Specifically, for the Packet service, a Packet service signal is extracted first, then mapped into an ODUk Mapper in a Packet packing manner, and finally mapped into an OTUk frame format signal to be sent to an optical transport network OTN. As the service signal flow is bidirectional, operations such as convergence, mapping, encapsulation, overhead monitoring, maintenance, management, protection, traffic monitoring, quality of service QoS, weighted random early detection WRED, operation, management, maintenance OAM, and shaping wrapper may be specifically referred to the ITUT g.709 standard, which is not described in detail in the embodiments of the present invention.
On the basis of the foregoing embodiment, the service types at least include a service and an optical channel data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and correspondingly, when the service type is the SDH service, the mapping, to an optical channel transport unit OTUk, the mapping is performed by mapping the minimized bearer granule corresponding to the service type to send the optical channel transport unit OTUk to an optical transport network OTN, where the mapping includes:
decoding VCn particles from the VCn encapsulation packets of the SDH service signals;
mapping the VCn particles into an N-level STM-N structure of a synchronous transmission module;
mapping the STM-N structure into an ODUk frame format signal;
and mapping the ODUk frame format signal into the OTUk to be sent to an optical transport network OTN.
Specifically, for an SDH service, the embodiment of the present invention first resolves a VCn particle from an encapsulation packet of a signal payload VCn, maps the VCn to an STM-N, performs mapping processing from the STM-N to an ODUk frame format, and finally maps the ODUk frame format signal to the OTUk to send the OTUk to an optical transport network OTN.
Similarly, for the SDH service, since the service signal stream is bidirectional, the embodiment of the present invention provides an encapsulation process in addition to a decapsulation process, and it should be noted that the SDH service is a service based on the TDM time division multiplexing technology, and has virtual containers with different layer mapping encapsulation VC4/VC3/VC12, and the virtual containers with different granularities can carry services with different bandwidths and provide services with different granularities. Specifically, in the embodiment of the present invention, a VC4 virtual container is demapped from a cell packet as a granularity service unit, and in order to reduce the number of entries of cell intersection on a system, the minimum scheduling granule of an SDH service in a cell switch in the system is VC4, so that the embodiment of the present invention completes the encapsulation processing of a VC4 service to an STM-N service. It should be noted that scheduling of smaller granular service VC3/VC12 is called low-order cross, VC3/VC12 is demapped from VC4, and after cross scheduling is performed on VC3/VC12, the smaller granular service VC3/VC12 is encapsulated into VC4, and this part of processing is only applicable to a case where the low-order cross service is small and VC3/VC12 that needs cross scheduling is in one VC4 container, and for a case where the low-order cross service is large, this part of processing needs to be transplanted to a switching module of an OTN network, and an embodiment of the present invention does not perform specific processing.
Fig. 2 is a schematic structural diagram of a multi-service hybrid access device according to an embodiment of the present invention, as shown in fig. 2, including: a bale breaking and unpacking module 201 and a service processing module 202, wherein:
the packet cutting and decapsulating module 201 is configured to identify a service type to which a received cell data packet belongs, and extract a minimum bearer particle corresponding to the service type;
the service processing module 202 is configured to map the minimized bearer granule corresponding to the service type into an optical access transport unit OTUk in a mapping manner corresponding to the service type, so as to send the OTUk to an optical transport network OTN.
Specifically, how to perform the technical solution of the embodiment of the multi-service hybrid access method shown in fig. 1 through the packet-cutting and decapsulating module 201 and the service processing module 202 is similar to the implementation principle and the technical effect, and is not described herein again.
According to the multi-service hybrid access device provided by the embodiment of the invention, the accessed service type is identified, the minimized load-bearing particles of the service type are adopted for scheduling, the scheduling result is directly mapped to the OTUk interface, the network level is simplified, the network delay is reduced, the scheduling process is adaptive to various service access scenes, and the flexibility is higher.
On the basis of the above embodiment, the apparatus further includes:
and the first group of packet modules are used for encapsulating all service signals into the cell data packets according to the minimum carrying particles contained in the service types corresponding to the service signals based on a preset unified cell encapsulation format.
On the basis of the above embodiment, the apparatus further includes:
and the second group of packet modules are used for adding preset frame headers of the service types of the cell data packets for all the cell data packets.
On the basis of the above embodiment, the package cutting and unpacking module is specifically configured to:
and identifying a preset frame header of the received cell data packet to determine the service type of the cell data packet.
On the basis of the foregoing embodiment, the service types at least include a service and optical path data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and accordingly, when the service type is the ODUk service, the service processing module is specifically configured to:
converging the low-order ODUk signals into high-order ODUk signals;
and mapping the high-order ODUk signal into the OTUk to be sent to an optical transport network OTN.
On the basis of the foregoing embodiment, the service types at least include a service and optical path data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and accordingly, when the service type is the packet network service, the service processing module is specifically configured to:
mapping the packet service signal into an ODUk frame format signal;
and mapping the ODUk frame format signal into the OTUk to be sent to an optical transport network OTN.
On the basis of the foregoing embodiment, the service types at least include a service and optical path data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and accordingly, when the service type is the SDH service, the service processing module is specifically configured to:
decoding VCn particles from the VCn encapsulation packets of the SDH service signals;
mapping the VCn particles into an N-level STM-N structure of a synchronous transmission module;
mapping the STM-N structure into an ODUk frame format signal;
and mapping the ODUk frame format signal into the OTUk to be sent to an optical transport network OTN.
Fig. 3 is a block diagram of an electronic device according to an embodiment of the present invention, and referring to fig. 3, the electronic device includes: a processor (processor)301, a communication Interface (communication Interface)302, a memory (memory)303 and a bus 304, wherein the processor 301, the communication Interface 302 and the memory 303 complete communication with each other through the bus 304. Processor 301 may call logic instructions in memory 303 to perform the following method: identifying the service type of the received cell data packet, and extracting the minimized bearing particles corresponding to the service type; and mapping the minimized bearer granule corresponding to the service type into an optical path transport unit (OTUk) by adopting a mapping mode corresponding to the service type so as to send the OTUk to an Optical Transport Network (OTN).
An embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments, for example, the method includes: identifying the service type of the received cell data packet, and extracting the minimized bearing particles corresponding to the service type; and mapping the minimized bearer granule corresponding to the service type into an optical path transport unit (OTUk) by adopting a mapping mode corresponding to the service type so as to send the OTUk to an Optical Transport Network (OTN).
Embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include: identifying the service type of the received cell data packet, and extracting the minimized bearing particles corresponding to the service type; and mapping the minimized bearer granule corresponding to the service type into an optical path transport unit (OTUk) by adopting a mapping mode corresponding to the service type so as to send the OTUk to an Optical Transport Network (OTN).
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to each embodiment or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A multi-service hybrid access method, comprising:
identifying the service type of the received cell data packet, and extracting the minimized bearing particles corresponding to the service type;
and mapping the minimized bearer granule corresponding to the service type into an optical path transport unit (OTUk) by adopting a mapping mode corresponding to the service type so as to send the OTUk to an Optical Transport Network (OTN).
2. The multi-service hybrid access method according to claim 1, wherein before said identifying the service type to which the received cell packet belongs, the method further comprises:
and based on a preset unified cell packaging format, packaging all service signals into the cell data packet by using the minimum bearing particles contained in the service type corresponding to the service signals.
3. The multi-service hybrid access method according to claim 2, wherein before encapsulating all service signals into the cell data packet with the minimum bearer granule included in the service type corresponding to the service signal based on the predetermined unified cell encapsulation format, the method further comprises:
and adding preset frame headers of the service types of the cell data packets for all the cell data packets.
4. The multi-service hybrid access method according to claim 3, wherein the identifying the service type to which the received cell packet belongs comprises:
and identifying a preset frame header of the received cell data packet to determine the service type of the cell data packet.
5. The multi-service hybrid access method according to claim 1, wherein the service types at least include a service and optical channel data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and correspondingly, when the service type is the ODUk service, the mapping the minimized bearer granule corresponding to the service type to an optical channel transport unit OTUk for sending to an optical transport network OTN includes:
converging the low-order ODUk signals into high-order ODUk signals;
and mapping the high-order ODUk signal into the OTUk to be sent to an optical transport network OTN.
6. The multi-service hybrid access method according to claim 1, wherein the service types at least include a service and optical channel data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and correspondingly, when the service type is the packet network service, the mapping the minimized bearer granule corresponding to the service type to an optical channel transport unit OTUk for sending to an optical transport network OTN includes:
mapping the packet service signal into an ODUk frame format signal;
and mapping the ODUk frame format signal into the OTUk to be sent to an optical transport network OTN.
7. The multi-service hybrid access method according to claim 1, wherein the service types at least include a service and optical channel data unit ODUk service, a packet network service, and a synchronous digital hierarchy SDH service, and correspondingly, when the service type is the SDH service, the mapping, to the optical channel transport unit OTUk, the minimum bearer granule corresponding to the service type is mapped to be sent to an optical transport network OTN, including:
decoding VCn particles from the VCn encapsulation packets of the SDH service signals;
mapping the VCn particles into an N-level STM-N structure of a synchronous transmission module;
mapping the STM-N structure into an ODUk frame format signal;
and mapping the ODUk frame format signal into the OTUk to be sent to an optical transport network OTN.
8. A multi-service hybrid access device, comprising:
the packet cutting and unpacking module is used for identifying the service type of the received cell data packet and extracting the minimum carrying particles corresponding to the service type;
and the service processing module is used for mapping the minimized load-bearing particles corresponding to the service types into an optical path transport unit OTUk by adopting a mapping mode corresponding to the service types so as to send the OTUk to an optical transport network OTN.
9. The multi-service hybrid access device of claim 8, wherein the device further comprises:
and the first group of packet modules are used for encapsulating all service signals into the cell data packets according to the minimum carrying particles contained in the service types corresponding to the service signals based on a preset unified cell encapsulation format.
10. The multi-service hybrid access device of claim 9, wherein the device further comprises:
and the second group of packet modules are used for adding preset frame headers of the service types of the cell data packets for all the cell data packets.
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