WO2012151890A1

WO2012151890A1 - Service mapping method and device

Info

Publication number: WO2012151890A1
Application number: PCT/CN2011/082051
Authority: WO
Inventors: 陆红; 王军
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-05-09
Filing date: 2011-11-10
Publication date: 2012-11-15
Also published as: CN102170599A

Abstract

Provided are a service mapping method and device. The method includes: detecting an accessing service signal, and determining the rate of the service signal; determining the service type corresponding to the service signal according to the rate thereof; and performing mapping processing on the service signal according to the determined service type. According to the technical solution provided in the present invention, services with any rate can be automatically mapped to the OTN, thus effectively improving the flexibility of service mapping.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method and apparatus for implementing service mapping. Currently, an optical transport network (OTN) in a transport network supports multiple types of service access. A service board generally supports only one or two known services. The general user knows in advance. For this type of service, you need to manually specify the service type through the network management to communicate normally. When the customer's service is changed, you need to manually modify the service type of the client-side board to implement normal communication. In the related art, the internal implementation of the board is usually fixed to a specific service mapping manner, which supports only one or several specific service accesses. However, for newly added services, automatic mapping of services cannot be achieved, and therefore, flexibility is not high. SUMMARY OF THE INVENTION In view of the problem that the automatic service mapping cannot be implemented in the related art, resulting in low flexibility, the present invention provides a method and apparatus for implementing service mapping to solve at least one of the above problems. According to one aspect of the invention, a method of implementing a service mapping is provided. The method for implementing service mapping according to the present invention includes: detecting an access service signal, determining a rate of the service signal; determining a service type corresponding to the service signal according to the rate of the service signal; and mapping the service signal according to the determined service type . Determining the service type corresponding to the service signal according to the rate of the service signal includes: searching for a service type corresponding to the rate of the service signal in a correspondence between the predetermined service type and the service rate. The foregoing predetermined correspondence with the service rate includes at least one of the following: a correspondence between a predetermined service type and a service rate value; a correspondence between a predetermined service type and a service rate range. The mapping processing of the service signal according to the determined service type includes: determining, according to the determined service type, whether the service signal needs to enter the intermediate layer general framing procedure GFP or the universal mapping procedure GMP; if needed, The service signal is then mapped to the intermediate layer GFP or GMP; if not required, the service signal is directly mapped to the optical path data unit ODUk frame signal. After mapping the service signal to the intermediate layer GFP or GMP, the method further includes: determining whether the service signal needs to enter the ODU0_TS layer or the ODU1_TS layer; if yes, mapping the service signal to the ODU0_TS layer or the ODU1_TS layer, and mapping the service signal It is mapped to the ODUk frame signal. Otherwise, the service signal is directly mapped to the ODUk frame signal; the ODUk frame signal is mapped to the unified ODUa frame signal. After mapping the ODUk frame signal to the unified ODUa frame signal, the method further includes: packaging the unified ODUa frame signal into a high-order optical transmission network OTN frame signal; and transmitting the packed OTN frame signal to the cross-board. According to another aspect of the present invention, an apparatus for implementing a service map is provided. The device for implementing service mapping according to the present invention includes: a rate detecting module configured to detect an accessed service signal to determine a rate of the service signal; and a type determining module configured to determine a service type corresponding to the service signal according to a rate of the service signal The mapping processing module is configured to perform mapping processing on the service signal according to the determined service type. The type determining module includes: a searching unit configured to search for a service type corresponding to a rate of the service signal in a correspondence between the predetermined service type and the service rate. The mapping processing module includes: a first determining unit, configured to determine, according to the determined service type, whether the service signal needs to enter the intermediate layer general framing procedure GFP or the universal mapping procedure GMP; the GFP mapping unit is configured to map the service signal to the middle layer The GFP mapping unit is configured to map the service signal to the intermediate layer GMP. The optical path data unit ODUk mapping unit is configured to directly map the service signal to the ODUk frame signal when the output of the first determining unit is negative. The mapping processing module further includes: a second determining unit, configured to determine whether the service signal needs to enter the ODU0 TS layer or the 0DU1_TS layer; and the ODU0_TS mapping unit is configured to map the service signal to the ODU0_TS layer when the service signal needs to enter the ODU0_TS layer; The 0DU1_TS mapping unit is configured to map the service signal to the 0DU1_TS layer when the service signal needs to enter the 0DU1_TS layer; the ODUa mapping unit is configured to map the service signal from the ODUk mapping unit into a unified ODUa frame signal; the ODUk mapping unit, It is also arranged to map traffic signals from the GFP mapping unit, the GMP mapping unit, the ODU0_TS mapping unit, or the ODU1 TS mapping unit to an ODUk frame signal. The mapping processing module further includes: an optical transmission network OTN framing unit configured to pack the unified ODUa frame signal into a high-order OTN frame signal; and a sending unit configured to send the OTN frame signal after the OTN framing unit is packed to Cross board. The invention detects the service signal of the access, determines the rate of the service signal, determines the service type corresponding to the service signal according to the rate of the service signal, and performs mapping processing on the service signal according to the determined service type, thereby solving the problem in the related technology. The automatic service mapping is implemented, which leads to the problem of low flexibility. In this way, services of any rate can be automatically mapped to the OTN, which improves the flexibility of service mapping. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the structure of an apparatus for implementing service mapping according to an embodiment of the present invention; FIG. 2 is a block diagram showing the structure of an apparatus for implementing service mapping according to a preferred embodiment of the present invention; FIG. 4 is a flowchart of a method for implementing service mapping according to an embodiment of the present invention; FIG. 5 is a flowchart of a method for implementing service mapping according to a preferred embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. FIG. 1 is a structural block diagram of an apparatus for implementing service mapping according to an embodiment of the present invention. As shown in FIG. 1 , the apparatus for implementing service mapping includes: a rate detection module 10, a type determination module 12, and a mapping processing module 14. The rate detecting module 10 is configured to detect the accessed service signal and determine the rate of the service signal. The type determining module 12 is configured to determine the service type corresponding to the service signal according to the rate of the service signal. The mapping processing module 14 is configured. The mapping of the service signals is performed according to the determined service type. In the related art, the internal implementation of the board is usually fixed to a specific service mapping manner, which supports only one or several specific service accesses. However, for newly added services, automatic mapping of services cannot be achieved, so the flexibility is not high. With the device for implementing service mapping shown in FIG. 1, the mapping processing module 14 can automatically map services of any rate to the OTN, thereby effectively improving the flexibility of service mapping. Preferably, the type determining module 12 may further include: a searching unit (not shown) configured to search for a service type corresponding to a rate of the service signal in a correspondence between the predetermined service type and the service rate. In a specific implementation process, the correspondence between the service type and the service rate may be recorded in a table in advance. After detecting the rate of the accessed service signal, the search unit in the type determining module 12 (not shown in the figure) ) You can find the type of service corresponding to this rate in this table. Preferably, the foregoing predetermined correspondence with the service rate may include, but is not limited to, at least one of the following:

(1) Correspondence between a predetermined service type and a service rate value; for a specific example, see the table mentioned later.

(2) Correspondence between the predetermined service type and the service rate range. Specific examples can be found in Tables 4 and 5 mentioned later. Preferably, the mapping processing module 14 may further include: a first determining unit 140, configured to determine, according to the determined service type, whether the service signal needs to enter a middle layer general framing procedure (Generic Frame Procedure, hereinafter referred to as GFP) or a universal mapping procedure ( Generic Mapping Procedure (abbreviated as GMP); GFP mapping unit 142 is configured to map the service signal to the intermediate layer GFP when it needs to enter the intermediate layer GFP; and the GMP mapping unit 144 is configured to perform the service when it needs to enter the intermediate layer GMP. The signal is mapped to the intermediate layer GMP; the ODUk mapping unit 146 is configured to directly map the traffic signal to the ODUk frame signal when it does not need to enter GFP or GMP. Preferably, the mapping processing module 14 further includes: a second determining unit 148, configured to determine whether the service signal needs to enter the ODU0_TS layer or the 0DU1_TS layer; and the ODU0_TS mapping unit 150 is configured to: when the service signal needs to enter the ODU0_TS layer, The service signal is mapped to the ODU0_TS layer; the 0DU1_TS mapping unit 152 is configured to map the service signal to the 0DU1_TS layer when the service signal needs to enter the 0DU1_TS layer; and the ODUa mapping unit 154 is configured to map the service signal from the ODUk mapping unit to the unified The ODUa frame signal; then the ODUk mapping unit 146 is further configured to map the traffic signal from the GFP mapping unit, the GMP mapping unit, the ODU0 TS mapping unit, or the 0DU1_TS mapping unit to an ODUk frame signal. For details of each unit included in the mapping processing module 14, reference may be made to FIG. 2. As shown in FIG. 2, the above-mentioned unit included in the mapping processing module 14 may be disposed on the FPGA board. Preferably, as shown in FIG. 3, the mapping processing module 14 may further include: an OTN framing unit 156 configured to pack the unified ODUa frame signal into a high-order OTN frame signal; and a transmitting unit (not shown in FIG. 3) Out), is set to send the OTN frame signal packed by the OTN framing unit to the cross board. It should be noted that in the example of FIG. 3, the above OTN framing unit 156 may be separately disposed outside the FPGA board. The above preferred embodiments are further described below in conjunction with FIGS. 2 and 3. 2 is a structural block diagram of an apparatus for implementing service mapping according to a preferred embodiment of the present invention. The device is mainly used in a centralized crossover system, and the device includes but is not limited to the following modules: The rate detecting module 10 and the type determining module 12 are interfaces for detecting the various signal rates of the client side by the device, and performing the rate detection result according to the service. Determining, determining a service type; the first determining unit 140 selects an adapted ODUk mapping unit or a GFP or GMP mapping unit according to different signal matching; the GFP mapping unit 142 performs unified packing of different services into GFP; the GMP mapping unit 144 The second judging unit 148 is configured to determine whether the service signal needs to enter the ODU0_TS layer or the 0DU1_TS layer. The ODU0_TS mapping unit 150 performs ODU0_TS encapsulation/decapsulation on the low-speed service. The 0DU1_TS mapping unit 152 is high. The ODUk mapping unit 146 performs the processing of the client signal to the ODUk mapping; the ODUa mapping unit 154 uniformly packages the ODUk of different orders into the ODUa, that is, completes the mapping processing of the ODUk to the ODUa; OTN mapping Package any ODUa coming from this system into a higher order OTN ( For example OTU2/3/4). The working principle of the device shown in the first embodiment is as follows: After the device for implementing the service mapping is started, the adaptive processing flow is started; the rate detecting module 10 and the type determining module 12 are interfaces for detecting the various signal rates of the client side by the device. Determining, according to the rate result of the service, determining the service type; the first determining unit 140 selects the adapted ODUk mapping unit or the GFP or GMP mapping unit according to different signal matching; the GFP mapping unit 142 completes the unification of different services. The GMP mapping unit 144 performs unified packing of different services into GMP. The second determining unit 148 is configured to determine whether the service signal needs to enter the ODU0_TS layer or the 0DU1_TS layer. The ODU0_TS mapping unit 150 performs ODU0_TS encapsulation/solution for the low-speed service. The 0DU1_TS mapping unit 152 performs 0DU1_TS encapsulation/decapsulation on the rate service higher than ODU0; the ODUk mapping unit 146 performs the processing of the client signal to the ODUk mapping; the ODUa mapping unit 154 uniformly packs the ODUks of different orders into the ODUa, and then passes the back The board port is sent to the cross board for processing. 3 is a structural block diagram of an apparatus for implementing service mapping according to a preferred embodiment 2 of the present invention. Wherein, the device is mainly applied to a distributed cross system, and the difference between FIG. 3 and FIG. 2 is as follows: In the preferred embodiment shown in FIG. 2 The unified ODUa signal is sent to the cross board through the backplane. In the preferred embodiment shown in FIG. 3, the unified ODUa signal can be packetized into the high-order OTN frame to the optical path by using the 0TN framing unit 156 on the service board. It should be noted that each module and each unit in the device for implementing the service mapping may be configured on an OTN service card, or may be configured on multiple service boards, and multiple service boards are stepped. Implement the above functions. 4 is a flow chart of a method of implementing service mapping in accordance with an embodiment of the present invention. As shown in FIG. 4, the method for implementing service mapping mainly includes the following processes: Step S402: Detecting an accessed service signal, determining a rate of the service signal; Step S404: determining a service type corresponding to the service signal according to a rate of the service signal Step S406: Perform mapping processing on the service signal according to the determined service type. In the related art, the internal implementation of the board is usually fixed to a specific service mapping manner, which supports only one or several specific service accesses. However, for newly added services, automatic mapping of services cannot be achieved, so the flexibility is not high. The method for implementing service mapping shown in FIG. 4 can automatically map services of any rate to the OTN, thereby effectively improving the flexibility of service mapping. Preferably, the foregoing step S404 may further include a process of searching for a service type corresponding to a rate of the service signal in a correspondence between the predetermined service type and the service rate. In a specific implementation process, the correspondence between the service type and the service rate may be recorded in a table in advance. After detecting the rate of the accessed service signal, the service type corresponding to the rate may be searched in the table. Preferably, the foregoing predetermined correspondence with the service rate may include, but is not limited to, at least one of the following:

(2) Correspondence between the predetermined service type and the service rate range. Specific examples can be found in Tables 4 and 5 mentioned later. Preferably, the foregoing step S406 may further include, but is not limited to, the following processing: (1) judging whether the service signal needs to enter the intermediate layer GFP or GMP according to the determined service type;

(2) If necessary, the service signal is mapped to the intermediate layer GFP or GMP; wherein, after mapping the service signal to the intermediate layer GFP or GMP, the following processing may also be included:

(2.1) determining whether the service signal needs to enter the ODU0_TS layer or the 0DU1_TS layer; (2.2) if yes, mapping the service signal to the ODU0_TS layer or the 0DU1_TS layer, and mapping the mapped service signal to the ODUk frame signal; otherwise, directly the service The signal is mapped to an ODUk frame signal;

(2.3) The ODUk frame signal can then be mapped to a uniform ODUa frame signal.

(3) If not required, the service signal is directly mapped to an ODUk frame signal. The ODUk frame signal can then be mapped to a uniform ODUa frame signal. The ODUk frame signal is mapped to a unified ODUa frame signal for efficient rate matching. Preferably, after mapping the ODUk frame signal into a unified ODUa frame signal, the following processing may also be included:

(4) Packing the unified ODUa frame signal into a high-order OTN frame signal;

(5) Send the packed OTN frame signal to the cross board. Through the above processing, in the case of centralized crossover, the unified ODUa signal can be packaged on the service board into a high-order OTN frame and sent to the optical path. The above preferred embodiment is further described below in conjunction with FIG. 5 is a flow diagram of a method of implementing a service map in accordance with a preferred embodiment of the present invention. As shown in FIG. 5, the method for implementing service mapping mainly includes the following processing: Step S502: The rate detecting module 10 detects a service signal rate, and if the rate is detected, proceeds to step S504. If no rate is detected, the process ends. Step S504: Determine whether the service type determination is successful. If the determination is successful, proceed to step S506. Otherwise, the detection rate is too high or the detection rate fails, and the process ends. Step S506: Output the detection result to the first determining unit 140, determine the service signal rate to be determined by using the first determining unit 140, and send the service to the GFP mapping unit 142, the GMP mapping unit 144 or the ODUk mapping unit according to the determination result. 146, if it is determined to be delivered to the GFP mapping unit 142 or GMP The mapping unit 144 proceeds to step S508, and if it is determined that the delivery to the ODUk mapping unit 146 directly proceeds to step S512, otherwise the determination fails and the flow ends. The judgment table is shown in Table 1.

Table 1

Step S508, determining to perform GFP or GMP mapping processing; Step S510, determining whether to enter the ODU0_TS mapping unit or the 0DU1_TS mapping unit according to the service type identified by the type determining module 12, and if yes, respectively, mapping the GFP or GMP mapping results respectively It is mapped to the ODU0_TS or 0DU1_TS slots that match the service, and the time slots of ODU0_TS and 0DU1_TS are divided as shown in the following table. If it is determined that the ODUk mapping unit needs to be entered, step S512 is performed; if the corresponding service is not found, the service signal framing fails, and the process ends. Each ODU0 is divided into 8 time slots, and the bandwidth of each ODU0 time slot is: (238/239) X 1.24416Gbps/8 = 154.87Mbps, as shown in Table 2. Table 2

Each ODU1 is divided into 4 time slots directly, and the bandwidth of each ODU1 time slot is exactly 622.08 Mbps, as shown in the following table. table 3

Time slot of ODU1

ODU1 TS1

ODU1 TS2

ODU1

ODU1 TS3

ODU1 TS4 In step S512, the partially determined service, such as the OTU1, OC-48/STM-16 service, enters the ODUk mapping unit 146, or the ODU0_TS or ODU1_TS enters the ODUk mapping unit 146 by step S506. That is, the service signal is automatically mapped into the ODUk frame according to the service type. As shown in Table 1. In step S514, the ODUa mapping unit 154 maps the signal output by the ODUk mapping module into an ODUa frame. In step S516, the unified ODUa frame in the system is sent to the high-order OTN framing module to complete the processing. Note: Table 1 lists the processing methods of the device that has access to the existing service type. For the unknown service, the processing mode of the device is similar to that of the existing service. After the service identification module identifies the rate class, The time slots of the unknown service are divided as follows: Table 4

table 5

In summary, with the above-mentioned embodiments provided by the present invention, the service signals of the interconnected access can be automatically determined without occupying overhead, and can be automatically mapped (also demapped). Moreover, the present invention supports both automatic identification and automatic processing of service signals between devices to which the present invention belongs, and supports the present invention. Automatic identification and automatic processing between the device and the existing device that is not automatically recognized. Therefore, the service type identification multiplexing processing when the service signal is accessed in the customer service access system is greatly facilitated, which has great practical value. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A method of implementing a service mapping, comprising:

Detecting the accessed service signal to determine the rate of the service signal;

Determining, according to the rate of the service signal, a service type corresponding to the service signal; performing mapping processing on the service signal according to the determined service type.

The method according to claim 1, wherein determining the service type corresponding to the service signal according to the rate of the service signal comprises:

The service type corresponding to the rate of the service signal is searched for in a correspondence between a predetermined service type and a service rate.

3. The method according to claim 2, wherein the predetermined correspondence with the traffic rate comprises at least one of:

Corresponding relationship between the predetermined service type and the service rate value;

The correspondence between the predetermined service type and the service rate range.

4. The method according to claim 1, wherein the mapping processing the service signal according to the determined service type comprises:

Determining, according to the determined service type, whether the service signal needs to enter an intermediate layer general framing procedure GFP or a universal mapping procedure GMP;

If desired, the traffic signal is mapped to the intermediate layer GFP or GMP; if not required, the traffic signal is directly mapped to the optical path data unit ODUk frame signal.

The method according to claim 4, further comprising: after mapping the service signal to the intermediate layer GFP or GMP, further comprising:

Determining whether the service signal needs to enter the ODU0_TS layer or the ODU1_TS layer; if yes, mapping the service signal to the ODU0_TS layer or the ODU1_TS layer, and mapping the mapped service signal to the ODUk frame signal Otherwise, the service signal is directly mapped to the ODUk frame signal;

The ODUk frame signal is mapped to a unified ODUa frame signal. The method according to claim 5, wherein after mapping the ODUk frame signal to the unified ODUa frame signal, the method further includes:

And encoding the unified ODUa frame signal into a high-order optical transmission network OTN frame signal; and transmitting the packed OTN frame signal to the cross-board. A device for implementing service mapping, comprising:

a rate detecting module, configured to detect an accessed service signal, and determine a rate of the service signal;

a type determining module, configured to determine, according to a rate of the service signal, a service type corresponding to the service signal;

The mapping processing module is configured to perform mapping processing on the service signal according to the determined service type. The device according to claim 7, wherein the type determining module comprises:

The searching unit is configured to search for a service type corresponding to the rate of the service signal in a correspondence between a predetermined service type and a service rate. The apparatus according to claim 7, wherein the mapping processing module comprises: a first determining unit, configured to determine, according to the determined service type, whether the service signal needs to enter an intermediate layer general framing procedure GFP or a universal mapping GMP;

a GFP mapping unit, configured to map the service signal to the intermediate layer GFP when it is required to enter the intermediate layer GFP;

a GMP mapping unit, configured to map the service signal to the intermediate layer GMP when the intermediate layer GMP needs to be entered;

The optical path data unit ODUk mapping unit is configured to directly map the service signal to an ODUk frame signal when it is not required to enter the intermediate layer GFP or GMP. The device according to claim 9, wherein the mapping processing module further comprises:

a second determining unit, configured to determine whether the service signal needs to enter an ODU0_TS layer or an ODU1 TS layer;

An ODU0_TS mapping unit, configured to map the service signal to the ODU0_TS layer when the service signal needs to enter the ODU0_TS layer;

a 0DU1_TS mapping unit, configured to map the service signal to the 0DU1_TS layer when the service signal needs to enter the 0DU1_TS layer;

An ODUa mapping unit, configured to map the service signal from the ODUk mapping unit to a unified ODUa frame signal;

The ODUk mapping unit is further configured to map the traffic signal from the GFP mapping unit, the GMP mapping unit, the ODU0_TS mapping unit, or the ODU1_TS mapping unit to the ODUk frame signal.

The device according to claim 10, wherein the mapping processing module further comprises:

An optical transmission network OTN framing unit configured to pack the unified ODUa frame signal into a high-order OTN frame signal;

And a sending unit, configured to send the OTN frame signal packed by the OTN framing unit to the cross board.