CN103825668B - General mapping code GMP mapping methods, de-mapping method and device - Google Patents

Abstract

A kind of general mapping code（GMP）Mapping method, de-mapping method and device, the mapping method include：In i-th expense of GMP block containers（GMP OH）In, carry the time slot that the i-th+n GMP blocks container needs to take（TS）Information（S201）；According to the TS information that the i-th+n GMP blocks container needs to take, the i-th+n GMP block container is adjusted（S202）；The i-th+n GMP blocks container after according to adjustment carries out GMP mappings to sent client traffic data（S203）.A kind of technical scheme of the embodiment of the present invention, there is provided trigger mechanism of TS adjustment.Transmitting terminal adds the TS information that GMP blocks container needs to take in the GMPOH of GMP block containers, enables receiving terminal according to the change of block container using corresponding demapping mode, realizes and is processed for the lossless mapping demapping of variable-block container using GMP.

Description

General mapping procedure GMP mapping method, demapping method and device

technical field

The invention relates to the field of communication technology, in particular to a general mapping procedure GMP mapping method, demapping method and device.

Background technique

OTN (Optical transport network, Optical Transport Network) is the core technology of the next-generation transport network, including the technical specifications of the electrical layer and the optical layer. OTN has rich OAM (Operation Administration and Maintenance, operation, management and maintenance), powerful TCM (Tandem Connection Monitoring, tandem connection monitoring) capabilities and out-of-band FEC (Forward Error Correction, forward error correction) capabilities, which can achieve large capacity Flexible scheduling and management of services has increasingly become the mainstream technology of the backbone transmission network.

At the electrical processing layer, OTN technology defines a powerful "Digital Wrapper" structure, which maps and encapsulates customer service data for transmission in OTN, and enables management and monitoring of customer service data. Digital encapsulation technology includes: mapping and multiplexing structure of Optical Channel Transport Unit (OTU, Optical Channel Transport Unit), time division multiplexing of Optical Channel Data Unit (ODU, Optical Channel Data Unit), Optical Channel Payload Unit (OPU, Optical Channel Payload Unit-k Overhead) time-division multiplexing, and customer business data mapping and other technical means.

With the rapid development of data services, more and more customer services need to be transmitted through the OTN. The current OTN system can no longer meet the requirements of directly carrying various services with different rates. In response to this problem, ITU-T (International Telecommunication Union-Telecommunication Standardization Sector, International Telecommunication Union-Telecommunications Standardization Sector) is discussing the formulation of a new optical transport network frame ODUflex frame to solve this problem. The ODUflex still maintains the original ODU structure, and can carry CBR (Constant BitRate, fixed bit rate) services and packet services at any rate. For different services, different mapping procedures are used to map service signals into the OPU.

ODUflex cannot be directly sent to the line, it needs to be encapsulated into HO ODU (Higher Order Optical Channel Data unit, high-order optical channel data unit), and transmitted through HO OTU (Higher Order Optical Channel Transport unit, high-order optical channel transmission unit).

Currently, the mapping method from ODUflex to HO ODU adopts GMP (Generic Mapping Procedure, general mapping procedure), wherein ODUflex occupies several TS (Time Slot, time slots) in the HO ODU. GMP is a general mapping procedure of OTN, which specifically generates the number of customer entities Cn value and clock information in each service frame period, and then calculates the distribution pattern of customer data in the payload area through the "sigma-delta" algorithm, and The customer data of Cn quantity is mapped into the position corresponding to the distribution pattern.

Due to the irregular change of packet service traffic, ODUflex needs to provide different bandwidths to meet its different traffic in different time periods, and it is necessary to adjust the ODUflex channel bandwidth when the packet service is continuous. This adjustment process involves the adjustment of the occupied bandwidth when the HO ODU carries ODUflex, that is, the TS adjustment in the HO ODU. The GMP block container is a space for carrying ODUflex, which consists of multiple TSs. Therefore, in order to adapt to changes in packet traffic, a mechanism is needed to adjust the size of the GMP block container.

Contents of the invention

The embodiment of the present invention provides a general mapping procedure GMP mapping method, demapping method and device.

On the one hand, an embodiment of the present invention provides a general mapping procedure GMP mapping method, the method includes: in the overhead GMP OH of the i-th GMP block container, carrying the time slot that the i+n-th GMP block container needs to occupy TS information; according to the TS information that the i+nth GMP block container needs to occupy, adjust the i+nth GMP block container; according to the adjusted i+nth GMP block container, the customer service data to be sent Carry out GMP mapping.

On the other hand, an embodiment of the present invention provides a general mapping procedure GMP demapping method, the method includes: obtaining the time required for the i+nth GMP block container carried by the overhead GMP OH of the i-th GMP block container Slot TS information; perform GMP demapping on the customer service data of the i+nth GMP block container according to the TS information to be occupied by the i+nth GMP block container.

In yet another aspect, an embodiment of the present invention provides a general mapping protocol GMP mapping device, the device comprising: an encapsulation unit, configured to carry the i+nth GMP block in the overhead GMP OH of the i-th GMP block container The time slot TS information that the container needs to occupy; the adaptation unit is used to adjust the i+nth GMP block container according to the TS information that the i+nth GMP block container needs to occupy; the mapping unit is used to adjust the i+nth GMP block container according to The adjusted i+nth GMP block container performs GMP mapping on the customer service data to be sent.

In the last aspect, the embodiment of the present invention provides a general mapping procedure GMP demapping device, the device includes: a decapsulation unit for obtaining the i+nth GMP carried by the overhead GMP OH of the ith GMP block container The time slot TS information that the block container needs to occupy; the demapping unit is configured to perform GMP demapping on the customer service data of the i+nth GMP block container according to the TS information that the i+nth GMP block container needs to occupy.

The technical solution of the embodiment of the present invention provides a trigger mechanism for TS adjustment. The sending end adds the TS information that the GMP block container needs to occupy in the GMP OH of the GMP block container, so that the receiving end can adopt the corresponding TS information according to the change of the block container. The demapping method realizes the non-destructive mapping and demapping processing for variable block containers using GMP.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the OTN frame structure figure of the embodiment of the present invention;

FIG. 1a is an example diagram of a TS distribution according to an embodiment of the present invention;

Fig. 2 is the overall method flowchart of embodiment 1 of the present invention;

FIG. 3 is a first schematic diagram of the encapsulation method of M information in Embodiment 1 of the present invention;

FIG. 4 is a second schematic diagram of the encapsulation method of M information in Embodiment 1 of the present invention;

Fig. 5 is the specific method flow chart 1 of embodiment 1 of the present invention;

Fig. 6 is an example diagram of GMP mapping according to the method of Fig. 5 according to an embodiment of the present invention;

Fig. 7 is the specific method flow chart II of embodiment 1 of the present invention;

FIG. 8 is an example diagram of GMP mapping according to the method in FIG. 7 according to Embodiment 1 of the present invention;

9 is a schematic diagram of TS adjustment and mapping granularity changes in Embodiment 1 of the present invention;

FIG. 10 is a flow chart of the overall method of Embodiment 2 of the present invention;

Figure 11 is a flow chart 1 of the specific method of Embodiment 2 of the present invention;

Figure 12 is the second flow chart of the specific method of Embodiment 2 of the present invention;

13 is an overall functional block diagram of a GMP mapping device according to Embodiment 3 of the present invention;

14 is a detailed functional block diagram of the GMP mapping device of Embodiment 3 of the present invention;

15 is an overall functional block diagram of a GMP demapping device according to Embodiment 4 of the present invention;

Fig. 16 is a detailed functional block diagram of a GMP demapping device according to Embodiment 4 of the present invention.

detailed description

In order to meet the requirements of ODUflex bandwidth adjustment and achieve lossless TS adjustment, the embodiment of the present invention provides a TS adjustment mechanism and a method and device for implementing GMP adaptive processing during TS adjustment. In order to realize TS adjustment of lossless data, the sending end includes TS information for indicating TS adjustment in the GMP overhead (this embodiment is represented as M information), so as to associate TS adjustment with GMP mapping and de-mapping processing; The end perceives the TS change of the GMP block container at the sending end according to the content of the M information, and performs lossless demapping processing according to the adjusted GMP block container.

In order to make the purpose, 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 and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Example 1:

FIG. 1 is a diagram of an OTN frame format in this embodiment. As shown in Figure 1, the OTN frame has a standard modular structure of 4080 columns × 4 rows. The 16 columns in the OTN frame header are overhead bytes, the 3808 columns in the middle are payload, and the 256 columns in the tail are FEC check bytes. The OTN frame includes: FAS (Frame Alignment Signal, Frame Alignment Signal) bytes located in row 1, columns 1-7, used to provide the function of frame synchronization positioning, and the seventh byte of FAS is a multiframe indication (Multi -Frame Alignment Signal, MFAS), used to indicate the overhead allocation when carrying multiple customer service data in a time-division multiplexed manner; OTUk OH (Optical Channel Transport Unit-k Overhead, Optical Channel Transport Unit-k Overhead, located in row 1, columns 8-14 ODUk OH (OpticalChannel Data Unit-k Overhead, Optical Channel Data Unit-k Overhead) in rows 2-4, columns 1-14) Bytes, used to provide maintenance and operation functions; OPUk OH (Optical Channel Payload Unit-k Overhead, optical channel payload unit k overhead) bytes located in columns 15-16, used to provide customer service data adaptation functions . The OPUk OH byte includes the payload structure identifier (Payload Structure Identifier, PSI), and the PSI corresponds to 0 to 255 possible values under the indication of MFAS, among which the 0th byte is the customer service data type indication (Payload Type, PT) , and the rest are reserved bytes (Reserved, RES), which are reserved for future expansion; the OPUk (Optical Channel Payload Unit-k, Optical Channel Payload Unit-k) byte located in the 17th-3824th column is used to provide customer service data Bearer functions, customer service data to be transmitted are encapsulated into OPUk; and FEC bytes located in columns 3825-4080 are used to provide error detection and error correction functions.

The coefficient k represents the supported bit rate, and different bit rates correspond to different types of OPUk, ODUk and OTUk. Among them, k=0 means that the bit rate is 1.25Gbit/s, k=1 means that the bit rate is 2.5Gbit/s, k=2 means that the bit rate is 10Gbit/s, k=3 means that the bit rate is 40Gbit/s, k= 4 means the bit rate is 100Gbit/s. Among them, OPUk and OPUk OH constitute the OPUk frame, OPUk frame, ODUk OH and FAS constitute the ODUk frame, ODUk frame, OTUk OH and FEC constitute the OTUk frame.

The mapping procedure refers to the method of mapping various types of services to be sent into the OPU payload area (Payload Area). In this embodiment, the GMP mapping procedure is used to map the customer service data into the OPU. Figure 1a is an example diagram of a TS distribution using GMP mapping in this embodiment. The GMP OH in Figure 1a is equivalent to the OPUk OH in Figure 1. The GMP OH in this embodiment includes the TS used to indicate the TS adjustment Information, one or more TSs in Figure 1a form a GMP block container to transmit customer service data.

Figure 1a uses OPU2 to illustrate the specific GMP mapping method. The payload area of the OPU2 frame is divided into 8 TSs, and 4 rows in each column form a time slot, which is marked as TS1, TS2, TS3 in turn, until TS8, and the cycle continues. Until the time slot allocation of all columns in the payload area is completed. Eight OPU2 frames constitute an OPU2 8-multiframe. Customer service data can be mapped to one or more time slots in the 8-multiframe payload area of the above-mentioned OPU2, and one or more TSs in the 8-multiframe of the above-mentioned OPU2 can form a GMP block container to carry service data. There are three TSs used to transmit business data, namely TS1, TS3 and TS4.

When putting customer business data into the GMP block container, put it in units of behavior. After the corresponding time slot of one row is full, a similar put operation is performed in the corresponding time slot of the next row. As shown in Figure 1a, the number of TSs occupied by the GMP block container is 3 at this time, and the mapping granularity is 3-byte (byte). When customer data is put into the GMP block container, it is within one clock cycle (by mapping determined by the clock information at the time) put 3 bytes of customer data into the first row of the 17th, 19th and 20th columns respectively, and then put the other 3 bytes of customer data into the first row in the second clock cycle The first row of columns 25, 27, and 28, and so on. After one row is full, perform a similar insertion operation on the next row.

Embodiment 1 of the present invention provides a general mapping procedure GMP mapping method, which may be based on the frame structure in FIG. 1 , and the mapping method is a processing method at the sending end.

FIG. 2 is a flow chart of the overall method of Embodiment 1 of the present invention. As shown in Figure 2, the method includes:

S201. In the overhead GMP OH of the i-th GMP block container, carry the time slot TS information to be occupied by the i+n-th GMP block container;

S202. Adjust the i+nth GMP block container according to the TS information to be occupied by the i+nth GMP block container;

S203. Perform GMP mapping on the customer service data to be sent according to the adjusted i+nth GMP block container.

In this embodiment, the timing of TS adjustment may be when the originator receives an external TS adjustment instruction or trigger command.

For ease of description, this embodiment takes n=1 as an example to describe the principle of the GMP mapping in detail. Assuming that the size of the (i+1)th GMP block container changes, the TS information to be occupied by the (i+1)th block container after the change can be known from the TS information carried in the GMP OH of the ith block container. Since the change of the latter GMP block container will be notified in advance in the previous GMP block container, the receiving end can also adaptively adjust the demapping method to achieve lossless data. The specific implementation manner of the receiving end will be described in detail in subsequent embodiments.

The TS information in this embodiment may include TS quantity information, and the TS quantity information is associated with the mapping granularity, that is, the TS quantity is consistent with the mapping granularity, and the TS quantity and the mapping granularity are adjusted at the same time; or, the TS information in this embodiment may also include TS quantity information and mapping granularity information, TS quantity and mapping granularity are adjusted respectively. In this embodiment, the specific distribution of TSs, that is, which TSs are used to transmit customer service data, is indicated in the PSI of the OTN frame.

1) The case where the number of TSs and mapping granularity are adjusted at the same time. For this case, the above TS information includes TS quantity information, and optionally, the quantity information may be expressed as a change indication of the TS quantity.

For this case, steps S202 and S203 may specifically include: adjusting the size and mapping granularity of the i+1th GMP block container at the same time according to the number of TSs; according to the adjusted size of the i+1th GMP block container and mapping granularity to perform GMP mapping on the customer service data to be sent.

2) The case where the number of TSs and mapping granularity are adjusted separately. For this case, the above TS information includes TS quantity and mapping granularity. You can adjust the number of TSs first, and then adjust the mapping granularity; or adjust the mapping granularity first, and then adjust the number, and finally make the two consistent.

When adjusting the number of TSs, the overhead GMP OH of the i-th GMP block container carries the TS number of the i+1th GMP block container that needs to be adjusted; steps S202 and S203 include: according to the number of TSs, for the i+th GMP block container The size of one GMP block container is adjusted; GMP mapping is performed on the customer service data to be sent according to the adjusted size of the i+1th GMP block container and the mapping granularity of the i-th GMP block container.

When adjusting the mapping granularity after adjusting the number of TSs, after step S202 and step S203, it also includes: carrying the mapping granularity of the j+mth GMP block container that needs to be adjusted in the overhead GMP OH of the jth GMP block container; The mapping granularity carried, adjusts the mapping granularity of the j+mth GMP block container; according to the size of the jth GMP block container and the mapping granularity of the j+mth GMP block container, the customer to be sent Business data is GMP mapped. For ease of description, this embodiment takes m=1 as an example to describe the principle of the GMP mapping in detail.

In this embodiment, optionally, when the bandwidth needs to be increased, the TS adjustment is performed first, and then the mapping granularity is changed; when the bandwidth needs to be reduced, that is, the TS is reduced and adjusted, the mapping granularity is changed first, and then the TS adjustment is performed. The embodiment of the present invention is not limited thereto, and the adjustment may also be performed in a reverse order of the foregoing manner. Whether it is adjusted at the same time or separately, the ultimate goal is to adjust TS and M-byte to be consistent. For example, the original mapping granularity is 3 TS and 3-byte. If TS is increased by 1, the final result is to achieve 4TS and 4-byte mapping granularity regardless of simultaneous adjustment or time-sharing adjustment.

The encapsulation method of TS information (hereinafter referred to as M information) that needs to be occupied by the GMP block container in S201 of Embodiment 1 of the present invention will be described in detail below.

FIG. 3 is a schematic diagram of an encapsulation method of M information according to an embodiment of the present invention, which is applicable to the situation where the number of TSs and the mapping granularity are adjusted at the same time. As shown in Figure 3: In column 15, row 1-3 of the general mapping procedure overhead GMP OH, three identical M information are placed, where the M information is TS quantity information, and the value range is [1-80]. Specifically, in a byte in column 15, row 1, bits 1 to 8 may all be used to store M information, that is, information on the number of TSs occupied by the GMP block container. Similarly, the same TS quantity information as that in the first row of the fifteenth column is placed in the respective 8-bit spaces of the fifteenth column, the second row, and the fifteenth row, the third row. When the TS needs to be adjusted, the M information is modified directly to the value corresponding to the adjusted TS, so that the next GMP block container can be adjusted to the size indicated by the modified M information.

Suppose the number of TSs occupied by the current GMP block container is 3, and the next GMP block container needs to occupy 4 TSs, then in the GMP OH of the current GMP block container, the values of the above three M information are uniformly modified to 4 in binary representation , to trigger resizing the chunk container to occupy 4 TS in the next GMP chunk container. The purpose of placing three identical M messages is to ensure correctness and prevent errors from being introduced during transmission. The receiving end can obtain M messages through large-number judgments. For example, when the three M information are consistent, it means that the transmission is correct, and any M information is used to indicate the number of TSs occupied by the GMP block container; when two of the three M information are consistent and the other is different, the consistent one is used Either one of the two M messages indicates the number of TSs occupied by the GMP block container; when the three M messages are inconsistent, it indicates a transmission error, and the number of TSs occupied by the GMP block container remains unchanged.

In this embodiment, when the TS quantity information and the mapping granularity information are adjusted at the same time, in the above encapsulation manner, the M information is not only the TS quantity information, but also the mapping granularity information M-bytes. The concept of mapping granularity refers to how many bytes are used to map the customer data to be sent to the OPUk. If the mapping granularity is 1, it is to put the customer data to be sent into the OPUk one byte at a time; if the mapping granularity is 3-bytes, the customer data to be sent is in units of 3 bytes Put it into OPUk. In this case, when the number of TSs changes, the mapping granularity also changes accordingly. The encapsulation method in Fig. 3 is suitable for the situation where the GMP block container and the mapping granularity change simultaneously.

However, those skilled in the art should understand that the M information is not limited to only including TS quantity information or mapping granularity information, and may further include TS current state information or source-sink interaction information in other specific applications. Moreover, the M information placement location and encapsulation manner in the embodiment of the present invention are not limited to the manner described above. That is, the overhead indication that triggers the TS adjustment is not limited to the change of the M information, and may also be a specific overhead indication specially formulated for triggering the TS adjustment.

FIG. 4 is a schematic diagram of another encapsulation method of M information according to an embodiment of the present invention. This encapsulation method is not only applicable to the situation where the number of TSs and the mapping granularity are adjusted at the same time, but also the situation where the number of TSs and the mapping granularity are adjusted separately. For unified description, subsequent embodiments will describe in detail various packaging methods of this embodiment with reference to FIG. 4 and specific tables.

In the following Tables 1-6, the M information encapsulation method is applicable to the situation where the number of TSs and the mapping granularity change at the same time. The TS number information is the mapping granularity information. When the number of TSs changes, the mapping granularity changes accordingly. For example, when indicating that the number of TSs increases by 1, it also indicates that the mapping granularity also increases by 1. Table 1-Table 6 describe the 6 states corresponding to the change of M information, that is, the states of M information unchanged, increased by 1, decreased by 1, increased by 2, decreased by 2, and increased or decreased by more than 2.

Table 1, M information change indicator table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. u u u u u u u u u u u u u u 0 0

As shown in Table 1, expand the 16 bits of the 15th column, row 1-2 in Figure 4 to form Table 1, bit1~bit14 in the 15th column, row 1-2 in Figure 4 are the same as bit1 in Table 1 ~bit14 correspond one-to-one, and are used to store M information, where 'U' represents data, and its value is 0 or 1; bit15-bit16 in Figure 4 corresponds to bit15-bit16 in Table 1, and I Indicates an increase instruction, and D indicates a decrease instruction. When I/D=00, it is used to indicate that the number of TS remains unchanged. At this time, 'U' in bit1~bit14 indicates the actual value of TS.

Table 2, M information change indicator table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. I u I u I u I u I u I u I u 1 0

As shown in Table 2, where 'U' represents the data, and 'I' represents the inversion of the bit. In Table 2, the odd-numbered bits of bit1 to bit14 are inverted on the basis of Table 1, that is, bit1, bit3, bit5, bit7, bit9, bit11, and bit13 are bit-inverted, and I/D=10, It is used to indicate that the M information changes, and specifically indicates that in the next GMP block container, the number of TSs should be increased by one.

Table 3, M information change indicator table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. u I u I u I u I u I u I u I 0 1

As shown in Table 3, when the even-numbered bits of bit1 to bit14 are reversed on the basis of Table 1, that is, bit2, bit4, bit6, bit8, bit10, bit12, and bit14 are reversed, and the I/D =01, it is used to indicate that the number of TS in the next GMP block container should be reduced by 1.

Table 4, M information change indicator table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. u I I u u I I u u I I u u I 1 0

As shown in Table 4, when bit2, bit3, bit6, bit7, bit10, bit11, and bit14 are bit-reversed on the basis of Table 1, and I/D=10, it is used to indicate the next GMP block container The number of medium TS should be increased by 2.

Table 5, M information change indicator table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. I u u I I u u I I u u I I u 0 1

As shown in Table 5, when bit1, bit4, bit5, bit8, bit9, bit12, and bit13 are bit-reversed on the basis of Table 1, and I/D=01, it is used to indicate that in the next GMP block container The number of TS should be reduced by 2.

Table 6, M information change indicator table

As shown in Table 6, when I/D=11, it indicates that the increase or decrease range of the TS value is greater than 2. At this time, directly input the binary value in bit1~bit14 to indicate the greatly adjusted TS value. For example, the original GMP block container occupies 30 TSs, now it is necessary to adjust the size of the block container to occupy 35 TSs, since the change range of TS is greater than 2, set I/D=11, and change the M information in bit1~bit14 Modified to the binary value represented by 35.

The above is only a preferred implementation manner, and other bit inversion rules combined with different I/D values may also be used to indicate various changes in the number of TSs, which is not limited in this embodiment of the present invention.

In this embodiment, when the TS quantity information and the mapping granularity information are adjusted separately, the encapsulation method shown in Figure 4 can be modified so that the GMP OH includes both the TS quantity information M and the mapping granularity information M', Since the 14bits space can place twice as much M information, it can be considered to appropriately save the amount of space, reducing the space for placing M information to 7bits, and the other 7bits space is used to place M' information. As shown in Figure 4, bits1~bit7 in the 15th column and row 1-2 of the GMP OH are used to store M information, and the M information is TS quantity information, with a value range of [1~80]; bit8~bit14 are used for Store M' information, M' information is the mapping granularity information, the value range is [1~80]; I/D is the increase or decrease instruction, the value is 0 or 1, shared by M information and M' information.

Table 7-Table 17 are time-division change indication tables of M information (number of TSs) and M' information (mapping granularity). As shown in Table 7-Table 17, this encapsulation method is suitable for the time-sharing change of GMP block container and mapping granularity, that is, when the number of TSs changes, the mapping granularity remains unchanged; when the mapping granularity changes, the number of TSs remains the same Change. In this embodiment, the values of the M information, the M' information, and the value of I/D are used to jointly indicate the change of the number of TSs and the mapping granularity.

Table 7, M information unchanged, M' information unchanged instruction table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. u u u u u u u u u u u u u u 0 0

As shown in Table 7, when I/D=00, it means that both the TS quantity information and the mapping granularity information remain unchanged.

Table 8, M information change, M' information unchanged instruction table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. I u I u I u I u u u u u u u 1 0

As shown in Table 8, one of the TS number and mapping granularity is varied, and the other is kept constant. For example, when the number of TSs changes, set I/D=10, and perform bit inversion on the odd-numbered bits bit1, bit3, bit5, and bit7 in bit1~bit7 on the basis of Table 7, indicating that in the next GMP block container Add 1 to the number of TSs, and keep the data in bit8-bit14 unchanged to indicate that the mapping granularity remains unchanged.

Table 9, M information changes, M' information unchanged instruction table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. u I u I u I u u u u u u u u 0 1

As shown in Table 9, when the even-numbered bits in bit1~bit7 are bit reversed on the basis of Table 7, and I/D=01, and the data in bit8~bit14 does not change, it is used to indicate the next The number of TSs in the GMP block container is reduced by 1, but the mapping granularity remains the same.

Table 10, M information changes, M' information unchanged instruction table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D.

u I I u u I I u u u u u u u 1 0

As shown in Table 10, when bit2, bit3, bit6, and bit7 in bit1~bit7 are bit-inverted on the basis of Table 7, I/D=10, and the data in bit8~bit14 does not change, use Indicates that the number of TSs in the next GMP chunk container is to be increased by 2, but the mapping granularity remains the same.

Table 11, M information change, M' information unchanged instruction table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. I u u I I u u u u u u u u u 0 1

As shown in Table 11, when bit1, bit4, and bit5 in bit1~bit7 are bit reversed on the basis of Table 7, and I/D=01, and the data in bit8~bit14 does not change, it is used to indicate The number of TSs in the next GMP block container is reduced by 2, but the mapping granularity remains the same.

Table 12, M information change, M' information unchanged instruction table

As shown in Table 12, when the increase or decrease of the number of TSs is greater than 2, directly input binary values in bit1~bit7 to indicate the value of the number of TSs after a large adjustment, that is, to indicate the change of the number of TSs in the next GMP block container is the value represented by the binary value, and since the data in bit8~bit14 does not change, the mapping granularity remains unchanged.

Table 13, M information unchanged, M' information change instruction table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. u u u u u u u I u I u I u I 1 0

As shown in Table 13, it is also possible that when the mapping granularity changes, the number of TSs remains unchanged. For example, set I/D=10, and invert the even-numbered bits in bit8~bit14 based on Table 7, and keep the data of bit1~bit7 unchanged to indicate that in the next GMP block container The mapping granularity is increased by 1, but the number of TS remains the same.

Table 14, M information unchanged, M' information change instruction table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. u u u u u u u u I u I u I u 0 1

As shown in Table 14, by setting I/D=01, the odd-numbered bits of bit8~bit14 are bit-reversed on the basis of Table 7, and the data of bit1~bit7 are kept unchanged to indicate that in the next GMP The mapping granularity in the block container is reduced by 1, but the number of TS remains the same.

Table 15, M information unchanged, M' information change instruction table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. u u u u u u u u I I u u I I 1 0

As shown in Table 15, by setting I/D=10, bit9, bit10, bit13, and bit14 in bit8~bit14 are bit-inverted on the basis of Table 7, and the data of bit1~bit7 is kept unchanged. to indicate that the mapping granularity is to be increased by 2 in the next GMP block container, but the number of TS remains the same.

Table 16, M information unchanged, M' information change instruction table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 I D. u u u u u u u I u u I I u u 0 1

As shown in Table 16, by setting I/D=01, bit8, bit11, and bit12 of bit8~bit14 are bit-inverted on the basis of Table 7, and the data of bit1~bit7 are kept unchanged to indicate In the next GMP block container the mapping granularity is reduced by 2, but the number of TS remains the same.

Table 17, M information unchanged, M' information change instruction table

As shown in Table 17, when the increase or decrease of the mapping granularity is greater than 2, directly input binary values in bit8~bit14 to indicate the greatly adjusted mapping granularity, that is, to indicate that in the next GMP block container, the mapping granularity changes as The value represented by the binary value, meanwhile, since the data in bit1~bit7 does not change, the number of TS remains unchanged.

The specific encapsulation manner above is only used to illustrate the embodiment of the present invention, and the placement position and encapsulation manner of the M information or M' information in Embodiment 1 of the present invention are not limited to the manner described above.

FIG. 5 is a flow chart 1 of a specific method in Embodiment 1 of the present invention, and the execution subject of the method is the originator. Figure 5 depicts the simultaneous variation of the GMP block container and mapping granularity, as shown in Figure 5, the method includes:

S501. Use the PSI [0-255] of the 256-multiframe of the HO ODU to complete the indication of the TS situation of the ODUflex occupying the HOODU by the optical transport network frame;

Specifically, the above TS situation indication indicates which TSs the ODUflex is specifically composed of (that is, the specific distribution of TSs) and the like.

S502. After the TS situation indication is completed, trigger TS switching and mapping granularity change operations through the M information change in the GMP OH; the above M information is the TS situation information occupied by the GMP block container, at least including the TS quantity information occupied by the GMP block container, It can also include, for example, TS current state information or source-sink interaction information;

Optionally, the specific process of S502 may include:

Modify the M information in the GMP OH of the i-th GMP block container, where i is a positive integer, i≥1, and can be flexibly controlled according to the adjustment requirements after the TS status indication is completed, that is, the first one after the TS status indication is completed , the second ... or modify the M information in the GMP OH of the i-th GMP block container. If the GMP uses the mapping granularity associated with the number of TSs for mapping, the M information is also the mapping granularity information M-byte. Modify the M information in the GMP OH of the i-th GMP block container, indicating that container adjustment and mapping granularity changes will be performed in the next (i+1) GMP block container. However, the size of the i-th GMP block container remains the same as the number of TSs originally occupied, and the original mapping granularity is still used in the i-th GMP block container to perform mapping processing on customer service data.

TS switching and mapping granularity changes are done in the next (i+1th) GMP block container. According to the M information in the GMP OH of the last (i-th) GMP block container, the adjustments required for the i+1-th GMP block container can be obtained, and the size of the i+1-th GMP block container is adjusted to the i-th The size indicated by the modified M information in the GMP OH of a GMP block container. If GMP uses the mapping granularity associated with the number of TSs for mapping, then the M information is also the mapping granularity information M-byte, then the i+1th GMP block container is also modified in the GMP OH of the i-th GMP block container The mapping granularity represented by the M information.

S503. After the TS adjustment and mapping granularity change are completed, in the i+1th GMP block container, the customer service data to be sent is mapped according to the adjusted container size and the changed mapping granularity, that is, the GMP mapping processing method is adopted Put customer business data into the adjusted GMP block container with the changed mapping granularity. In the subsequent GMP block container, normal GMP mapping processing is performed on the customer service data to be sent in the adjusted block container according to the changed mapping granularity.

FIG. 6 is an example diagram of GMP mapping performed according to the method in FIG. 5 according to an embodiment of the present invention. As shown in Figure 6 as an example, the i-th GMP block container occupies 3 TS, and at the same time, the customer service data is mapped into the GMP block container at a 3-byte mapping granularity; the size of the i+1-th GMP block container is adjusted to 4 TSs, at the same time map customer business data into GMP block containers with 4-byte mapping granularity.

FIG. 7 is the second flow chart of the specific method in Embodiment 1 of the present invention, and the execution subject of the method is the originator. Figure 7 describes the situation of GMP block container and mapping granularity time-sharing change, as shown in Figure 7, the method includes:

S701. Use the PSI [0-255] of the 256-multiframe of the HO ODU to complete the indication of the TS status of the ODUflex occupying the HO ODU.

S702. After the above TS status indication is completed, perform a TS switching operation through the change of the M information in the GMP OH, and use the switched TS to perform GMP mapping.

Optionally, the specific process of the above S702 may include:

The M information is modified in the GMP OH of the i-th GMP block container, indicating that container adjustment will be performed in the next (i+1th) GMP block container, where i is a positive integer. This step can be flexibly controlled according to adjustment requirements after the TS indication is completed, that is, the M information can be modified in the GMP OH of the first, second... or i-th GMP block container after the TS indication is completed. The M information is the TS information occupied by the GMP block container, at least including TS quantity information. The size of the i-th GMP block container still maintains the number of TSs originally occupied; the i-th GMP block container still adopts the original mapping granularity for data mapping.

Complete TS switching in the i+1th GMP block container. According to the M information in the GMP OH of the last (i-th) GMP block container, the adjustment situation of the i+1-th GMP block container can be known, and the i+1-th GMP block container can be adjusted to the size indicated by the above M information . The mapping granularity used when performing mapping processing in the i+1th GMP block container remains unchanged.

S703. Trigger the mapping granularity change operation through the change of the M' information in the GMP OH.

Optionally, the specific process of S703 may include:

Modify the M' information in the GMP OH of the jth GMP block. Where j is a positive integer. When the number of TSs is adjusted first, and then the mapping granularity is adjusted, j>i+1, but in this embodiment, the mapping granularity can also be adjusted first, and then the number of TSs is adjusted. Therefore, in this embodiment, between i and j The relationship is not limited.

At this time, the M' information is GMP mapping granularity information, that is, M-byte. Modify the M' information to indicate that the mapping granularity in the next (j+1th) GMP block container will change to the mapping granularity indicated by the M' information.

The size of the jth GMP block container remains unchanged, and the original mapping granularity is still used in the jth GMP block container to map the customer service data to be sent; the change of the mapping granularity is completed in the j+1th GMP block container. The size of the j+1 th GMP block container remains unchanged, that is, the size of the j+1 th GMP block container is consistent with the size of the j th GMP block container. According to the M' information in the GMP OH of the last (jth) GMP block container, the mapping granularity adopted by the j+1th GMP block container can be known, and the mapping granularity in the j+1th GMP block container is changed to The size indicated by the above M' information.

S704. After the TS adjustment and mapping granularity change are completed, use the changed mapping granularity to perform mapping processing on the customer service data to be sent in the j+1th GMP block container. In the subsequent GMP block container, normal GMP mapping processing is performed on the customer service data to be sent according to the changed mapping granularity and the adjusted block container size.

FIG. 8 is an example diagram of GMP mapping according to the method in FIG. 7 according to Embodiment 1 of the present invention. As shown in Figure 8, the i-th GMP block container occupies 3 TS, and at the same time, the customer service data is mapped into the GMP block container at a 3-byte granularity; the size of the i+1-th GMP block container is adjusted to 4 TS , while still mapping customer business data into GMP block containers at 3-byte granularity; the size of the jth GMP block container still occupies 4 TS, while still mapping customer business data into GMP block containers at 3-byte granularity Middle; the size of the j+1th GMP block container still occupies 4 TS, and the mapping granularity is adjusted to 4-byte, and the customer business data is mapped into the GMP block container at a 4-byte granularity.

FIG. 9 is a schematic diagram of TS adjustment and mapping granularity changes in Embodiment 1 of the present invention. The M information or M' information in Figure 9 is placed in the first GMP overhead position of each GMP chunk container. As shown in Figure 9, it is assumed that ODUflex is transmitted through HO ODU2, where ODUflex occupies three TS of HO ODU2 (TS1, TS3, TS4 respectively, and the TS rate level is 1.25Gb/s), and is mapped to HO ODTU2.3 through GMP After that, HO ODTU2.3 is multiplexed into HO ODU2. Since the rate of ODUflex is about to increase, it needs to occupy 4 TSs of HO ODU2 (TS1, TS3, TS4, TS5 respectively). Then adopt the GMP processing method of the embodiment of the present invention, operate in the following manner (GMP block container and mapping granularity change simultaneously),

1. Through the PSI [0-255] of the 256-multiframe of HO ODU2, complete the indication of ODUflex occupying TS of HO ODU2. Among them, PSI[2], PSI[4], PSI[5], and PSI[6] indicate that the current ODUflex needs to occupy TS1, TS3, TS4, and TS5.

2. After the TS status indication is completed, trigger TS switching and mapping granularity change by changing the M information in the GMP OH.

2.1 Modify the M information in the GMP OH of the i-th GMP block container, and the M information changes from 3TS to 4TS.

The i-th GMP block container size remains HO ODTU2.3.

In the i-th GMP block, the ODUflex is still mapped with a 3-bytes mapping granularity.

Wherein, i is a positive integer, which can be flexibly controlled according to adjustment requirements after the TS status indication is completed.

2.2 Complete TS switching and mapping granularity change in the i+1th GMP block.

Adjust the current GMP block container to HOODTU2.4 according to the M information in the GMP OH of the previous (i-th) GMP block container.

At the same time, the ODUflex is mapped with a 4-bytes mapping granularity in the i+1th GMP block container.

3. After TS adjustment and mapping granularity changes are completed, GMP performs normal mapping processing in the block container HOODTU2.4 according to the 4-bytes mapping granularity.

In the existing technology, when TS adjustment is required, the sender can only complete the indication of the TS status of ODUflex occupying HO ODU by sending 256-multiframe PSI [0~255] to the receive end, but it cannot make the receive end perceive that the sender is in the When to perform TS switching operation. Due to the different rate levels of HO ODUk, there is a phenomenon that the GMP block container is not aligned with the boundary of the 256-multiframe period (for example, in ODU3, the GMP block container occupies the 32-multiframe TS of ODU3; in ODU4, the GMP The block container occupies the 80-multiframe TS of ODU4. There is no multiple relationship between 80 and 256, so there will be a phenomenon that the GMP block container is not aligned with the 256-multiframe cycle boundary), which will cause data damage when TS is switched.

To sum up, the GMP in the prior art can only perform mapping processing for fixed containers, but cannot effectively process for variable containers. With the adjustment of GMP block containers, in order not to damage data, GMP needs to have the ability to adapt to container adjustments. However, in the prior art, GMP cannot achieve adaptive processing for variable containers, so lossless data cannot be achieved. the goal of.

In the method of Embodiment 1 of the present invention, by carrying the time slot TS information that the GMP block container needs to occupy in the general mapping procedure overhead GMP OH, and triggering the adjustment of the size of the next GMP block container through the change of the TS information, it is realized in the Lossless switching of TS during TS adjustment. Since the mapping process is performed using the mapping granularity associated with the occupied TS information, by modifying the TS information added in GMP OH, the mapping granularity used by the next GMP block container can be changed accordingly; or by modifying the TS added by GMPOH respectively The information and mapping granularity information can make the GMP block container and mapping granularity change in time-sharing. The method enhances the self-adaptation of GMP, and can achieve lossless mapping and demapping processing for variable containers and variable mapping granularity.

Example 2:

Embodiment 2 of the present invention provides a general mapping procedure GMP demapping method, which is a processing method at the receiving end.

FIG. 10 is a flow chart of the overall method of Embodiment 2 of the present invention. As shown in Figure 10, the method includes:

S1001. Obtain the time slot TS information to be occupied by the i+n GMP block container carried by the overhead GMP OH of the i-th GMP block container;

S1002. Perform GMP demapping on the customer service data of the i+nth GMP block container according to the TS information of the i+nth GMP block container.

The processing object of the demapping is also the customer service data, that is, the customer service data is demapped from the GMP block container.

In an optional implementation manner, the TS information includes the number of TSs, the number of TSs is associated with the mapping granularity, and the GMP block container and the mapping granularity change at the same time, corresponding to this optional implementation manner:

The above method specifically includes: obtaining the number of TSs that need to be occupied by the i+n GMP block container carried by the overhead GMP OH of the i-th GMP block container; The associated mapping granularity performs GMP demapping on the customer service data of the i+nth block container.

In another optional implementation, the TS information includes TS quantity and mapping granularity, GMP block container and mapping granularity time-sharing change, corresponding to this optional implementation:

The above method specifically includes: obtaining the number of TSs that need to be occupied by the i+n GMP block container carried by the overhead GMP OH of the i-th GMP block container; The mapping granularity of the container performs GMP demapping on the customer service data of the i+nth GMP block container; obtains the mapping granularity of the j+mth GMP block container carried by the overhead GMP OH of the jth GMP block container; according to the jth The TS quantity of the first GMP block container and the mapping granularity of the j+mth GMP block container perform GMP demapping on the customer service data of the j+mth GMP block container.

For ease of description, this embodiment takes n=1 as an example to describe the principle of the GMP demapping in detail. FIG. 11 is a flow chart 1 of the specific method of Embodiment 2 of the present invention, which corresponds to the situation where the GMP block container and mapping granularity change simultaneously. As shown in Figure 11, the method includes:

S1101. According to the PSI [0-255] indication of the 256-multiframe of the received HO ODU, obtain the TS situation that the ODUflex needs to occupy the HOODU;

S1102. After obtaining the above-mentioned TS status indication, perform corresponding GMP demapping processing by detecting the change of M information in the GMP OH;

Optionally, the process of S1102 may specifically include:

1) Detect the M information in the GMP OH of the GMP block container and handle it accordingly.

When it is detected that the M information in the GMP OH of a certain (for example, i-th) GMP block container has changed, it means that in the next (i+1) GMP block container, TS adjustment has been performed, that is, the GMP block container The size is adjusted, and the mapping granularity is also changed, indicating that the next (i+1th) GMP block container needs to be demapped according to the mapping granularity and block container represented by the M information. Otherwise, it indicates that in the next (i+1th) GMP block container, the GMP demapping process is still performed according to the original mapping granularity and the original block container.

2) Demap processing in the next GMP block container.

According to the M information indication in the GMP OH of the previous (i-th) GMP block container, corresponding demapping processing is performed. When the above M information indicates that the TS has been switched, in the GMP block container represented by the M information, the demapping process is performed according to the mapping granularity represented by the M information, that is, in the i+1th GMP block container, according to the above M The size of the block container represented by the information and the mapping granularity represented by the above-mentioned M information are demapped, that is, in the block container of the size represented by the above-mentioned M information, the customer service data is converted into The mapping granularity indicated by is demapped; otherwise, the original mapping granularity is still used in the original GMP block container for GMP demapping processing.

S1103. After the TS adjustment and mapping granularity change are completed, perform normal GMP demapping processing in the adjusted block container according to the changed mapping granularity.

Refer to FIG. 6 for an example diagram of performing GMP demapping according to the method shown in FIG. 11 in Embodiment 2 of the present invention. As shown in Figure 6, the i-th GMP block container occupies 3 TSs, and at the same time demaps customer service data from the GMP block container at a 3-byte granularity; the size of the i+1-th GMP block container is adjusted to 4 TS, and at the same time demap customer business data from the GMP block container at a 4-byte granularity.

FIG. 12 is the second flow chart of the specific method of Embodiment 2 of the present invention, which corresponds to the time-division change of the GMP block container and mapping granularity. As shown in Figure 12, the method includes:

S1201. According to the PSI [0-255] indication of the 256-multiframe of the received HO ODU, obtain the TS situation that the ODUflex needs to occupy the HOODU.

S1202. After the TS condition indication is obtained, the corresponding GMP demapping process is performed when the container is adjusted by detecting the change of the M information in the GMP OH.

Optionally, the specific process of S1202 includes:

1) Detect the M information in the GMP OH of the GMP block container and handle it accordingly.

When it is detected that the M information in the GMP OH of the i-th GMP block container changes, it means that in the next (i+1th) GMP block container, the TS adjustment is performed, that is, the i+1-th GMP block container The size is adjusted, indicating that the next GMP block container needs to be demapped according to the block container represented by the changed M information. Otherwise, it indicates that the next GMP block container is still demapped according to the original block container. In the i-th GMP block container, the demapping process is still performed according to the size of the original block container.

2) Perform demapping processing in the next (i+1th) GMP block container.

According to the M information indication in the GMP OH of the previous (i-th) GMP block container, corresponding demapping processing is performed. When the TS is instructed to switch, the i+1th GMP block container is demapped according to the size of the block container represented by the changed M information; otherwise, the i+1th GMP block container is still in accordance with the original block container size Perform demapping processing. Wherein, the mapping granularity adopted when the i+1th GMP block container is demapped remains unchanged.

S1203. By detecting the change of M' information in the GMP OH, perform the corresponding GMP demapping process when the mapping granularity changes.

Optionally, the specific process of S1203 may include:

1) Detect the M' information in the GMP OH of the GMP block and process accordingly.

When the M' information in the GMP OH of the jth GMP block container changes, it means that in the next (j+1th) GMP block container, the mapping granularity has changed, indicating that in the next (j+1th) The GMP block container needs to be demapped according to the mapping granularity indicated by the M' information. Otherwise, it indicates that the next (j+1th) GMP block container is still demapped according to the original mapping granularity. where j is a positive integer.

2) Perform demapping processing in the next (j+1th) GMP block container.

According to the M' information indication in the GMP OH of the last (jth) GMP block, perform corresponding demapping processing. When the mapping granularity of the indicated GMP has been changed, the demapping process is performed in the j+1th GMP block container according to the mapping granularity represented by the M' information; otherwise, the original j+1th GMP block container is still used Mapping granularity for demapping processing. Wherein, the size of the j+1th GMP block container remains unchanged.

S1204. After the TS adjustment and mapping granularity change are completed, perform normal GMP demapping processing in the adjusted block container according to the changed mapping granularity.

Refer to FIG. 8 for an example diagram of performing GMP demapping according to the method shown in FIG. 12 in Embodiment 2 of the present invention. As shown in Figure 8, the i-th GMP block container occupies 3 TSs, and at the same time demaps customer service data from the GMP block container at a 3-byte granularity; the size of the i+1-th GMP block container is adjusted to 4 TS, while still demapping customer business data from the GMP block container at a 3-byte granularity; the size of the jth GMP block container still occupies 4 TS, while still demapping customer business data from the GMP block container at a 3-byte granularity It is demapped from the GMP block container; the size of the j+1th GMP block container still occupies 4 TS, and the demapping granularity is adjusted to 4-byte, and the customer business data is decoded from the GMP block container at a 4-byte granularity. Map out.

The technical scheme of Embodiment 2 of the present invention is illustrated below by specific examples:

1. Obtain the indication that ODUflex needs to occupy TS1, TS3, TS4, and TS5 of HOODU2 according to the received PSI [0-255] indication of the 256-multiframe of HO ODU2.

2. After the TS status indication is obtained, the corresponding GMP demapping process is performed by detecting the change of the M information in the GMP OH.

2.1 Detect that the M information in the GMP OH of the i-th GMP block container changes from 3TS to 4TS, and trigger a response operation.

Indicates that in the next (i+1th) GMP block, TS adjustment is performed, that is, the i+1th GMP block container is adjusted to HO ODTU2.4, and the mapping granularity is also changed to 4-bytes.

The i-th GMP block container size remains HO ODTU2.3.

The i-th GMP block container still adopts 3-bytes mapping granularity to demap ODUflex.

2.2 Perform demapping processing in the next GMP (i+1th) block container.

According to the M information indication in the GMP OH of the last (i-th) GMP block container, the demapping process is performed according to the changed mapping granularity of 4-bytes in the adjusted GMP block container HOODTU2.4.

3. After TS adjustment and mapping granularity changes are completed, GMP performs normal demapping processing in the block container HOODTU2.4 according to the 4-bytes mapping granularity.

In the method of Embodiment 2 of the present invention, by detecting whether the TS information of the time slot occupied by the GMP block container changes in the general mapping procedure overhead GMP OH; when it is detected that the TS information or the mapping granularity information changes, trigger the The mapping granularity is adjusted accordingly, and the demapping process is performed according to the block container size represented by the changed TS information, so as to achieve adaptive processing for variable containers and variable mapping granularity, and realize lossless TS Adjustment.

Example 3:

Embodiment 3 of the present invention provides a general mapping procedure GMP mapping device, which can implement the mapping method in Embodiment 1.

Fig. 13 is a functional block diagram of a general mapping procedure GMP mapping device according to Embodiment 3 of the present invention. As shown in Figure 13, the device 10 includes:

The encapsulation unit 101 is configured to carry the time slot TS information to be occupied by the i+n GMP block container in the overhead GMP OH of the i-th GMP block container;

An adaptation unit 102, configured to adjust the i+nth GMP block container according to the TS information that the i+nth GMP block container needs to occupy;

The mapping unit 103 is configured to perform GMP mapping on the customer service data to be sent according to the adjusted i+nth GMP block container.

1) Optionally, the TS information includes a TS quantity, and the TS quantity is associated with a mapping granularity.

Corresponding to this situation, the encapsulation unit 101 can also be used to carry the TS quantity of the i+nth GMP block container that needs to be adjusted in the overhead GMP OH of the i-th GMP block container; the adaptation unit 102 , can also be used to simultaneously adjust the size and mapping granularity of the i+nth GMP block container according to the number of TSs; the mapping unit 103 can also be used to adjust the size and mapping granularity of the i+nth GMP block container according to the adjusted The size and mapping granularity perform GMP mapping on the customer service data to be sent.

2) Optionally, the TS information includes TS quantity and mapping granularity.

Corresponding to this situation, the encapsulation unit 101 can also be used to carry the TS quantity of the i+nth GMP block container that needs to be adjusted in the overhead GMP OH of the i-th GMP block container; the adaptation unit 102 , can also be used to adjust the size of the i+nth GMP block container according to the number of TSs; the mapping unit 103 can also be used to adjust the size of the i+nth GMP block container according to the adjusted size and The mapping granularity of the i-th GMP block container performs GMP mapping on the customer service data to be sent.

Optionally, the encapsulation unit 101 may also be configured to carry the mapping granularity of the j+mth GMP block container that needs to be adjusted in the overhead GMPOH of the jth GMP block container; the adaptation unit 102 may also be It is used to adjust the mapping granularity of the j+mth GMP block container according to the carried mapping granularity; the mapping unit 103 can also be used to adjust the j+mth GMP block container according to the size of the jth GMP block container and the j+mth GMP block container GMP mapping is performed on the customer service data to be sent at the mapping granularity.

Fig. 14 is a detailed functional block diagram of the device according to Embodiment 3 of the present invention. As shown in Figure 14, the device 20 includes:

Serial-to-parallel conversion unit 201: used to distribute serial data to M buffer pipelines at byte granularity, where M is the number of TSs of HO ODUs occupied by ODUflex, and also the mapping granularity; when the mapping granularity is 3-byte, the serial And the conversion unit 201 writes the client data of 3 bytes in parallel into 3 cache pipelines at a time, that is, writes the client data of 1 byte respectively to each cache pipeline in the above-mentioned 3 cache pipelines;

Channel unit (Channel1-Channel M) 206: caches pipelines at byte granularity;

Information generation unit 202: generate data information C8M and clock information C8-delta during mapping, wherein C8M is the data volume of M bytes granularity mapped into the GMP block container; clock information refers to the speed when customer data is mapped into the GMP block container degree or mapping rate;

Mapping unit 203: used to read data from M buffer pipelines according to a certain mapping algorithm, the above-mentioned mapping algorithm is, for example, a "sigma-delta" algorithm; for example, when the mapping granularity is 3, read data from Read customer data from 3 buffer pipelines to the encapsulation unit;

Encapsulation unit 204: for encapsulating data and overhead into frames;

TS adaptation unit 205: for triggering TS adjustment and mapping granularity changes during the GMP mapping process. When the TS is adjusted (assuming that the TS is changed from M-1 to M), the serial-to-parallel conversion unit 201, the mapping unit 203, and the encapsulation unit 204 are triggered in a certain order to perform corresponding processing. The specific processing method includes: the TS adaptation unit 205 according to Cache pipeline data depth (the amount of data stored in the current cache pipeline), C8M value and GMP block cycle (the time to map and process a GMP block container, also refers to the multi-frame cycle), calculate when to trigger the serial-to-parallel conversion unit by the distribution To M-1 cache pipelines, switch to distribute to M cache pipelines, that is, the data written to the cache pipelines after switching will be mapped to the adjusted GMP block of the container.

The following example illustrates the processing when TS and M are switched at the same time:

Assume that at the initial moment of the GMP block container, the data depth of the cache pipeline is D; the amount of customer data at the M-1 byte granularity that needs to be mapped into the current GMP block container is expressed as C8(M-1)_cur, where C8(M- 1) _cur>=D>0, after writing C8(M-1)_cur-D data of M-1 byte granularity on the entrance side of M-1 cache pipelines, the serial-to-parallel conversion unit 201 is distributed to M -1 cache pipeline is switched to be distributed to M cache pipelines, that is, switched to start writing data of M byte granularity on the entry side of M cache pipelines.

Mapping unit 203, after reading C8(M-1)_cur pieces of M-1 byte granularity data in M-1 cache pipelines in the current GMP block cycle, switches to read in M cache pipelines at the beginning of the next GMP block Take M-byte granularity data, and this switching moment is the GMP block boundary. The encapsulation unit 204 multiplexes the GMP block container (HO ODTU.M) into the HO ODU at the boundary of the HO ODU multiframe. The information generation unit 202 is used to input the generated data information and clock information to the encapsulation unit 204, and the above data information and clock information are included in the GMP OH; the encapsulation unit 204 is also used to generate ODU OH and OTU OH, so that the encapsulation unit 204 It can be used to use the above ODU OH, OTU OH and GMP OH as the overhead of the OTN frame, and encapsulate the frame overhead and effective customer data into a frame.

The device of the embodiment of the present invention can enhance the adaptability of GMP by triggering the adjustment of the time slot TS and the change of the mapping granularity, and achieve lossless mapping and demapping processing for variable containers and variable mapping granularity.

Example 4:

Embodiment 4 of the present invention provides a general mapping procedure GMP demapping device, which can implement the demapping method in Embodiment 2.

FIG. 15 is an overall functional block diagram of a GMP demapping device according to Embodiment 4 of the present invention. As shown in Figure 15, the device 30 includes:

The decapsulation unit 301 is configured to obtain the time slot TS information to be occupied by the i+n GMP block container carried by the overhead GMP OH of the i-th GMP block container;

The demapping unit 302 is configured to perform GMP demapping on the customer service data of the i+nth GMP block container according to the TS information of the i+nth GMP block container.

Optionally, the TS information includes the number of TSs, and the number of TSs is associated with the mapping granularity; the decapsulation unit 301 is configured to obtain the i+nth GMP carried by the overhead GMP OH of the ith GMP block container The number of TSs that the block container needs to occupy; the demapping unit 302 is configured to, according to the number of TSs of the i+nth GMP block container and the mapping granularity associated with the number of TSs, map the i+nth block container GMP de-mapping of customer business data.

Optionally, the TS information includes TS quantity and mapping granularity; the decapsulation unit 301 can be used to obtain the TS that needs to be occupied by the i+nth GMP block container carried by the overhead GMP OH of the i-th GMP block container Quantity; the demapping unit 302 can be used to perform GMP resolution on the customer service data of the i+n GMP block container according to the TS quantity of the i+n GMP block container and the mapping granularity of the i GMP block container Mapping; the decapsulation unit 301 can also be used to obtain the mapping granularity of the j+mth GMP block container carried by the overhead GMP OH of the jth GMP block container; the demapping unit 302 can also be used to The TS quantity of the j-th GMP block container and the mapping granularity of the j+m-th GMP block container perform GMP de-mapping on the customer service data of the j+m-th GMP block container.

Fig. 16 is a detailed functional block diagram of the device according to Embodiment 4 of the present invention. As shown in Figure 16, the device 40 includes:

A decapsulation unit 401, configured to extract the overhead from the optical transport network frame;

The TS adaptation unit 402 is configured to obtain the time slot TS change information and mapping granularity change information during the mapping process from the overhead, and perform corresponding trigger operations;

An information obtaining unit 403, configured to obtain data information C8M and clock information C8-delta from the overhead;

A demapping unit 404, configured to demap the customer service data carried in the optical transport network frame, and write it into a plurality of byte granular buffer pipelines 206;

A parallel-to-serial conversion unit 405, configured to combine the payload data in the plurality of byte granular buffer pipelines (Channel1˜Channel M) 406 into a serial data stream.

DDS (Direct Digital Synthesizer) is a direct digital frequency synthesizer, used to restore customer service clock.

The device in the embodiment of the present invention provides a variable container and variable mapping granularity by obtaining the time slot TS change information and mapping granularity change information from the overhead, and performing corresponding trigger operations. A GMP adaptive processing method and a trigger mechanism for lossless switching of TS, the device enhances GMP self-adaptation, and achieves lossless mapping and demapping processing for variable containers and variable mapping granularity.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), and the like.

The above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them; although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (28)

1. one kind is general maps code GMP mapping methods, it is characterised in that methods described includes：

In the OPU expenses of the first rank optical channel Payload Unit HO OPU multi-frames high, carry change and indicate, the change is designated as The change of number of timeslots is indicated, and the time slot is that the GMP blocks container in the 2nd HO OPU multi-frames needs the time slot for taking；

Indicated according to the change, adjust the number of timeslots taken needed for GMP blocks container described in the 2nd HO OPU multi-frames；

Mapped by GMP, client traffic data are mapped into the GMP block containers after adjustment.

2. method according to claim 1, it is characterised in that；

The change instruction is to increase to indicate or reduce to indicate, and described increase indicates to represent and increase the 2nd HO OPU multi-frames The number of timeslots taken required for the GMP blocks container, the reduction is indicated to represent and reduces institute in the 2nd HO OPU multi-frames State the number of timeslots taken required for GMP blocks container；

It is described to be indicated according to the change, adjust the time slot taken needed for GMP blocks container described in the 2nd HO OPU multi-frames Quantity, including:Indicate or reduce to indicate according to described increase, increase or decrease respectively described in the 2nd HO OPU multi-frames The number of timeslots taken needed for GMP blocks container.

3. method according to claim 1, it is characterised in that:

Methods described also includes:Indicated according to the change, the mapping granule of adjustment GMP mappings, wherein the mapping grain after adjustment Spend is associated with the number of timeslots taken required for the GMP blocks container after adjustment;

It is described to be mapped by GMP, client traffic data are mapped into the GMP block containers after adjustment, including:Mapped by GMP, with Client traffic data are mapped into mapping granule after adjustment the GMP block containers after adjustment.

4. method according to claim 3, it is characterised in that：

GMP block containers after the GMP blocks container and the adjustment are the HOODTU for taking different time-gap quantity.

5. the method according to Claims 1-4 any one, it is characterised in that:

The change indicates to carry out the adjustment of demapping for triggering the receiving terminal of reception the first HO OPU multi-frames.

6. the method according to Claims 1-4 any one, it is characterised in that:

The client traffic data are ODUflex data.

7. the method according to Claims 1-4 any one, it is characterised in that:

The 2nd HO OPU multi-frames are next multi-frames of the HO OPU multi-frames.

8. one kind is general maps code GMP mapping methods, it is characterised in that methods described includes：

In the OPU expenses of the first rank optical channel Payload Unit HO OPU multi-frames high, carry change and indicate, the change is designated as The change of number of timeslots is indicated, and the time slot is the required time slots taken in the 2nd HOOPU multi-frames of ODUflex；

Indicated according to the change, adjust the timeslot number taken in the 2nd HO OPU multi-frames required for the ODUflex Amount；

Data to the ODUflex carry out GMP mappings, wherein the data of the ODUflex are by the number of timeslots after adjustment Time slot send.

9. method according to claim 8, it is characterised in that：

The change instruction is to increase to indicate or reduce to indicate, it is described increase indicate to represent increase required for the ODUflex The number of timeslots taken in the 2nd HO OPU multi-frames, the reduction indicates to represent that the reduction ODUflex is required in institute State the number of timeslots taken in the 2nd HO OPU multi-frames；

It is described to be indicated according to the change, adjust taken in the 2nd HO OPU multi-frames required for the ODUflex when Gap quantity, including：Indicate or reduce to indicate according to described increase, the ODUflex is increased or decreased respectively required described The number of timeslots taken in 2nd HO OPU multi-frames.

10. method according to claim 8, it is characterised in that：

Methods described also includes：Indicated according to the change, the mapping granule of adjustment GMP mappings, wherein the mapping grain after adjustment Spend is associated with the number of timeslots taken in the 2nd HO OPU multi-frames required for the ODUflex after adjustment；

The data to the ODUflex carry out GMP mappings, including：According to the mapping granule after adjustment to the ODUflex Data carry out GMP mappings.

11. methods according to claim 8, it is characterised in that

The change indicates to carry out the adjustment of demapping for triggering the receiving terminal of reception the first HO OPU multi-frames.

12. a kind of general mapping code GMP de-mapping methods, it is characterised in that methods described includes：

The change that acquisition is carried in the OPU expenses of the first rank optical channel Payload Unit HO OPU multi-frames high is indicated, the change The change for being designated as number of timeslots is indicated, and the time slot is that the GMP blocks container in the 2nd HO OPU multi-frames needs the time slot for taking；

Indicated according to the change, the client traffic data to the GMP blocks container in the 2nd HO OPU multi-frames are carried out GMP demappings.

13. methods according to claim 12, it is characterised in that：

It is described to be indicated according to the change, to the client traffic data of the GMP blocks container in the 2nd HO OPU multi-frames GMP demappings are carried out, including：According to number of timeslots and mapping granule after change, to the institute in the 2nd HO OPU multi-frames Stating the client traffic data of GMP block containers carries out GMP demappings, and the number of timeslots after the change indicates meaning for the change The number of timeslots for showing, the mapping granule is associated with the number of timeslots after the change.

14. methods according to claim 13, it is characterised in that

The GMP blocks container is HO ODTU；The data of ODUflex during the client traffic data.

15. method according to claim 12 to 14 any one, it is characterised in that

The 2nd HO OPU multi-frames are next multi-frames of the HO OPU multi-frames.

16. a kind of general mapping code GMP de-mapping methods, it is characterised in that methods described includes：

The change that acquisition is carried in the OPU expenses of the first rank optical channel Payload Unit HO OPU multi-frames high is indicated, the change The change for being designated as number of timeslots is indicated, and the time slot is the required time slots taken in the 2nd HO OPU multi-frames of ODUflex；

Indicated according to the change, the data of the ODUflex to being carried in the 2nd HO OPU multi-frames carry out GMP solutions and reflect Penetrate.

17. methods according to claim 16, it is characterised in that：

Described to be indicated according to the change, the data of the ODUflex to being carried in the 2nd HO OPU multi-frames carry out GMP solutions Mapping, including：According to number of timeslots and mapping granule after change, to being carried in the 2nd HO OPU multi-frames The data of ODUflex carry out GMP demappings, and the number of timeslots after the change is the timeslot number indicated by the change is indicated Amount, the mapping granule is associated with the number of timeslots after the change.

18. a kind of general mapping code GMP mapping devices, it is characterised in that described device includes：

Encapsulation unit, indicates in the OPU expenses of the first rank optical channel Payload Unit HO OPU multi-frames high, carrying change, Described to change the change instruction for being designated as number of timeslots, the time slot is that the GMP block containers in the 2nd HOOPU multi-frames need to take Time slot；

Adaptation unit, for being indicated according to the change, adjusts and accounted for needed for GMP block containers described in the 2nd HO OPU multi-frames Number of timeslots；

Client traffic data, for being mapped by GMP, are mapped into the GMP block containers after adjustment by map unit.

19. devices according to claim 18, it is characterised in that：

The change instruction is to increase to indicate or reduce to indicate, and described increase indicates to represent and increase the 2nd HO OPU multi-frames The number of timeslots taken required for the GMP blocks container, the reduction is indicated to represent and reduces institute in the 2nd HO OPU multi-frames State the number of timeslots taken required for GMP blocks container；

The adaptation unit, specifically for indicating or reducing to indicate according to described increase, increases or decreases the 2nd HO respectively The number of timeslots taken needed for GMP blocks container described in OPU multi-frames.

20. devices according to claim 18, it is characterised in that：

The adaptation unit, is additionally operable to be indicated according to the change, the mapping granule of adjustment GMP mappings, wherein reflecting after adjustment Radion degree is associated with the number of timeslots taken required for the GMP blocks container after adjustment;

, specifically for being mapped by GMP, be mapped into for client traffic data with the mapping granule after adjustment adjusting by the map unit GMP block containers after whole.

21. device according to claim 18 to 20 any one, it is characterised in that：

GMP block containers after the GMP blocks container and the adjustment are the HO ODTU for taking different time-gap quantity；

The change indicates to carry out the adjustment of demapping for triggering the receiving terminal of reception the first HO OPU multi-frames；

The client traffic data are ODUflex data；

The 2nd HO OPU multi-frames are next multi-frames of the HO OPU multi-frames.

22. a kind of general mapping code GMP mapping devices, it is characterised in that described device includes：

Encapsulation unit, indicates in the OPU expenses of the first rank optical channel Payload Unit HO OPU multi-frames high, carrying change, Described to change the change instruction for being designated as number of timeslots, the time slot is that ODUflex is required to be accounted in the 2nd HO OPU multi-frames Time slot；

Adaptation unit, for being indicated according to the change, adjusts the ODUflex required in the 2nd HO OPU multi-frames The number of timeslots of occupancy；

Map unit, GMP mappings are carried out for the data to the ODUflex, wherein the data of the ODUflex are by adjustment The time slot of number of timeslots afterwards sends.

23. devices according to claim 22, it is characterised in that：

The change instruction is to increase to indicate or reduce to indicate, it is described increase indicate to represent increase required for the ODUflex The number of timeslots taken in the 2nd HO OPU multi-frames, the reduction indicates to represent that the reduction ODUflex is required in institute State the number of timeslots taken in the 2nd HO OPU multi-frames；

The adaptation unit, specifically for indicating or reducing to indicate according to described increase, increases or decreases the ODUflex respectively The required number of timeslots taken in the 2nd HO OPU multi-frames.

24. device according to claim 22 or 23, it is characterised in that：

The adaptation unit, is additionally operable to be indicated according to the change, the mapping granule of adjustment GMP mappings, wherein reflecting after adjustment Radion degree is associated with the number of timeslots taken in the 2nd HO OPU multi-frames required for the ODUflex after adjustment；

The map unit, specifically for carrying out GMP mappings to the data of the ODUflex according to the mapping granule after adjustment.

25. a kind of general mapping code GMP demapping devices, it is characterised in that described device includes：

Decapsulation unit, for obtaining the change being carried in the OPU expenses of the first rank optical channel Payload Unit HO OPU multi-frames high Change and indicate, described to change the change instruction for being designated as number of timeslots, the time slot is the GMP block containers in the 2nd HO OPU multi-frames Need the time slot for taking；

De-mapping unit, for being indicated according to the change, to the visitor of the GMP blocks container in the 2nd HO OPU multi-frames Family business datum carries out GMP demappings.

26. devices according to claim 25, it is characterised in that：

The de-mapping unit, it is multiple to the 2nd HO OPU specifically for according to the number of timeslots and mapping granule after change The client traffic data of the GMP blocks container in frame carry out GMP demappings, and the number of timeslots after the change is the change Indicate indicated number of timeslots, the mapping granule is associated with the number of timeslots after the change.

27. a kind of general mapping code GMP demapping devices, it is characterised in that described device includes：

Decapsulation unit, for obtaining the change being carried in the OPU expenses of the first rank optical channel Payload Unit HO OPU multi-frames high Change and indicate, described to change the change instruction for being designated as number of timeslots, the time slot is multiple in the 2nd HO OPU required for ODUflex The time slot taken in frame；

De-mapping unit, for being indicated according to the change, the number of the ODUflex to being carried in the 2nd HO OPU multi-frames According to carrying out GMP demappings.

28. devices according to claim 27, it is characterised in that：

The de-mapping unit, specifically for according to the number of timeslots and mapping granule after change, to being carried on the 2nd HO The data of the ODUflex in OPU multi-frames carry out GMP demappings, and the number of timeslots after the change indicates meaning for the change The number of timeslots for showing, the mapping granule is associated with the number of timeslots after the change.