CN102026045A

CN102026045A - Method, device and system for transmitting and receiving data frames

Info

Publication number: CN102026045A
Application number: CN2009100933046A
Authority: CN
Inventors: 胡幸; 李昆; 曹旸; 周建林
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2009-09-17
Filing date: 2009-09-17
Publication date: 2011-04-20
Anticipated expiration: 2029-09-17
Also published as: CN102026045B

Abstract

The embodiment of the invention provides a method, a device and a system for transmitting and receiving data frames. The method for transmitting the data frames comprises the following steps of: respectively allocating N groups of service data, which are sent to the same destination and in the same data type, serving as effective data to N transmission subchannels; packaging the N transmission subchannels, which are respectively allocated with the effective data, serving as data payload into a data frame, wherein the data frame comprises a data frame header, and the data frame header comprises a type identifier and a length identifier; and sending the data frame to the destination. In the embodiment of the invention, a source allocates N groups of service data, which are sent to the same destination and in the same data type to the N transmission subchannels, and the N transmission subchannels serving as the data payload are packaged into a data frame, so that a plurality of groups of service data in the same type can be transmitted in the data frame, the byte overhead for transmitting the plurality of groups of service data is saved, and the utilization rate of the transmission bandwidth is improved.

Description

The transmission processing of Frame and receiving handling method, device and system

Technical field

The embodiment of the invention relates to communication technical field, relates in particular to a kind of transmission processing and receiving handling method, device and system of Frame.

Background technology

EPON (Passive Optical Network, hereinafter to be referred as: PON) be a kind of broadband optical access technology, can realize that the unified of different kinds of business inserts, and by Dynamic Bandwidth Allocation (Dynamic Bandwidth Assignment, hereinafter to be referred as: DBA) mechanism satisfies the bandwidth demand of different kinds of business.

In the prior art, G.894.3, ITU-T has defined at gigabit passive optical network (Gigabit-PON, hereinafter to be referred as: GPON) in the system, transmission time division multiplexing (Time DivisionMultiplexing, hereinafter to be referred as: TDM) Ye Wu method, this method is: the source end utilize elongated GPON encapsulation mode (GPON Encapsulation Mode, hereinafter to be referred as GEM) frame encapsulation tdm data, wherein the PLI territory in the GEM frame head is used for indicating the effective word joint number of this GEM frame tdm data; Then, the source end with the GEM frame by the GPON transmission convergence layer (GPONTransmission Convergence layer, hereinafter to be referred as: GTC) be encapsulated as GTC frame and be sent to Su Duan; Parse the GEM frame in the Su Duancong GTC frame, from the GEM frame, take out tdm data again and the tdm data that takes out is put into buffer memory, Su Duan adopts adaptive technique to adjust the output clock frequency of TDM business according to what of data volume in the buffer memory then, and the tdm data in the buffer memory is sent to the destination.

Fig. 1 is that existing tdm traffic is encapsulated into the schematic diagram in the GEM frame, as shown in Figure 1, the source end is put into TDM service buffer district with the TDM business datum that receives earlier, the TDM business datum in the TDM service buffer district is encapsulated in the payload of variable-length of GEM frame, each GEM frame also comprises the frame head of 5 byte lengths again; Wherein, the frame head of GEM frame comprises PLI, Port ID, PTI and HEC, and wherein PLI is payload user data length mark symbol, and Port ID is a port-mark, and PTI is a payload type, and HEC is a detected field.

In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: in the GPON system during TDM operation transmission, the source end is encapsulated in each road TDM business in the GEM frame, thereby make every road TDM business all increase the GEM frame frame head expense of 5 bytes, for example: when E1 business (a kind of TDM business of GPON system transmissions low speed, the transmission speed of E1 business is that every 125us transmits 32 bytes) time, transmitting every road E1 business needs 37 bytes at least; To organize the TDM business more and be transferred to one night and hold and a kind of common business configuration is the source end, this moment, the source end will encapsulate separately many groups TDM business, and because each GEM frame of encapsulation all will increase the frame head expense of 5 bytes, therefore the source end mail to one night end many groups TDM business datum will cause byte overhead to be multiplied, cause the transmission bandwidth utilance low.

Summary of the invention

The embodiment of the invention provides a kind of transmission processing and receiving handling method, device and system of Frame, in order to when transmission is organized the TDM business datum more, improves the utilance of transmission bandwidth.

The embodiment of the invention provides a kind of transmission processing method of Frame, comprising:

With mail to phase chummage end and with the N of data type group business datum, be fitted to N respectively as valid data and transmit in the subchannel, each length of transmitting subchannel is identical, described N is a positive integer;

There is N of described valid data to transmit subchannel with adaptive respectively, described payload user data is packaged into Frame, comprise the data frame head in the described Frame as payload user data; Described data frame head comprises the length mark that is used to indicate the type identification of described traffic data type and is used to indicate described payload user data length;

Described Frame is sent to described Su Duan.

The embodiment of the invention provides a kind of receiving handling method of Frame, comprising:

The Frame that the reception sources end sends with described Frame decapsulation, gets access to payload user data by the data frame head of resolving in the described Frame; Described data frame head comprises type identification that is used for indicating the traffic data type that described payload user data transmits and the length mark that is used to indicate described payload user data length;

According to described type identification, in described payload user data, from the beginning obtain N transmission subchannel; Each length of transmitting subchannel is identical, and described N is a positive integer;

From described N transmission subchannel, obtain N group business datum respectively as valid data.

The embodiment of the invention also provides a kind of method for transmission processing of Frame, comprises the transmission processing method of arbitrary Frame that the embodiment of the invention provides and the receiving handling method of arbitrary Frame.

The embodiment of the invention provides a kind of transmission processing unit of Frame, comprising:

The path adaptation module, be used for mail to phase chummage end and with the N of data type group business datum, be fitted to N respectively as valid data and transmit in the subchannel, each length of transmitting subchannel is identical, described N is a positive integer;

The Frame package module is used for having N of described valid data to transmit subchannel as payload user data with adaptive respectively, and described payload user data is packaged into Frame, comprises the data frame head in the described Frame; Described data frame head comprises the length mark that is used to indicate the type identification of described traffic data type and is used to indicate described payload user data length;

The Frame sending module is used for described Frame is sent to described Su Duan.

The embodiment of the invention provides a kind of receiving and processing device of Frame, comprising:

Decapsulation module is used for the Frame that the reception sources end sends, and with described Frame decapsulation, gets access to payload user data by the data frame head of resolving in the described Frame; Described data frame head comprises type identification that is used for indicating the traffic data type that described payload user data transmits and the length mark that is used to indicate described payload user data length;

The passage acquisition module is used for according to described type identification, from the beginning obtains N transmission subchannel in described payload user data; Each length of transmitting subchannel is identical, and described N is a positive integer;

Data acquisition module is used for organizing business datum from the N that described N transmission subchannel obtains respectively as valid data.

The embodiment of the invention also provides a kind of transmission process system of Frame, comprises the transmission processing unit of arbitrary Frame that the embodiment of the invention provides and the receiving and processing device of arbitrary Frame.

The transmission processing and the receiving handling method of the Frame that the embodiment of the invention provides, device and system, the source end will mail to phase chummage end, and the N group TDM business datum with data type is fitted in N the transmission subchannel, N transmission subchannel is encapsulated in the Frame as payload user data, and this Frame sent to Su Duan, Su Duan carries out getting access to N group TDM business datum after the corresponding decapsulation, can a shared frame head expense when this method makes the many groups of transmission TDM business datum, just the payload user data with a Frame has been divided into N transmission subchannel, realized the payload user data channelizing of Frame, make and to transmit many groups TDM business datums of the same type in the Frame, save the byte overhead of the many groups of transmission TDM business datum, improved the utilance of transmission bandwidth.

Description of drawings

Fig. 1 is that existing tdm traffic is encapsulated into the schematic diagram in the GEM frame;

Fig. 2 is the flow chart of steps of the transmission processing method embodiment one of Frame of the present invention;

Fig. 3 is the flow chart of steps of the receiving handling method embodiment one of Frame of the present invention;

Fig. 4 is the flow chart of steps of TDM service data transmission method embodiment one of the present invention;

Fig. 5 is the schematic diagram of the payload user data channelizing of GEM frame among the embodiment shown in Figure 4;

Fig. 6 is the flow chart of steps of TDM service data transmission method embodiment two of the present invention;

Fig. 7 is the schematic diagram of the payload user data channelizing of GEM frame among the embodiment shown in Figure 6;

Fig. 8 is the schematic diagram of the payload user data channelizing of E-GEM frame in the embodiment of the invention;

Fig. 9 is the structural representation of the transmission processing unit embodiment one of Frame of the present invention;

Figure 10 is the structural representation of the transmission processing unit embodiment two of Frame of the present invention;

Figure 11 is the structural representation of the receiving and processing device embodiment one of Frame of the present invention;

Figure 12 is the structural representation of the receiving and processing device embodiment two of Frame of the present invention.

Embodiment

Further specify the technical scheme of the embodiment of the invention below in conjunction with the drawings and specific embodiments.

At present, the type of service of user online is from the application of traditional browsing page, develop into gradually the application based on video and audio frequency technology applications such as blog, video monitoring, video request program, time-moving television program request, especially along with the appearance of Web TV integrated service business such as (IPTV), the user sharply increases the demand of bandwidth.Relevant to the demand of bandwidth with the type of service that the user uses, need broadband access system for satisfying the user dynamic need of bandwidth is adjusted timely to bandwidth and respond thus, and satisfy the requirement of user the business experience quality.Introduce two kinds of broadband access technology: PON and multi-service transmission network below.

PON can realize that the unified of different kinds of business inserts, and satisfy the bandwidth demand of different kinds of business by DBA mechanism, have bandwidth resources share, save machine room investment, device security height, fast, the comprehensive networking cost of networking speed low, be fit to converge the multi-user, capacity is big, transmission range is long and advantage such as life-span length.The characteristics of PON are some physical topological structures to multiple spot, by optical line terminal (OpticalLine Terminals, hereinafter to be referred as: OLT), Optical Distribution Network (Optical Distribution Network, hereinafter to be referred as: ODN) and a plurality of optical network units (Optical Network Unit, hereinafter to be referred as: ONU) form.Wherein, a plurality of ONU share fiber resource, share the OLT port; ODN connects an OLT and one or more ONU with passive mode.Being down direction from OLT to ONU, is up direction from ONU to OLT.Optical branch point among the ODN does not need active node device, only needs a passive optical branching device to get final product.The Dynamic Bandwidth Allocation of PON system inserts the principle of (TDMA) based on time-division multiplexing multiple access.The GPON system is the PON system that moves with greater than the bit rate of 1Gb/s.

Multi-service transmission network level includes service adapting layer, channel layer and physical layer three-decker, and level is few, and processing of circuit is simple, reliability is high, saves cost and power consumption, and realizes simple.Service adapting layer is responsible for encapsulation and the decapsulation to the miscellaneous service Unified Form, and requires to specify in network the professional unique sign of each bar, and wherein (Enhanced GEM is hereinafter to be referred as E-GEM) frame for the GEM of expansion for the uniform service form.According to principles such as type of service, priority and destination addresses, a plurality of E-GEM frames are formed dissimilar transmission container (Transmission Container, hereinafter to be referred as: the T-CONT frame), add path overhead, constitute channel layer, can realize alarm end to end and conveying function monitoring to channel layer.All T-CONT frames are formed transmission convergence layer (Transmission Convergence, hereinafter to be referred as: the TC frame), add physical layer overhead, comprise frame head synchronously, administration overhead and bandwidth map (Bandwidth Map, be called for short: BWmap) etc., main frame is to the communication and the management of each node in the network to make things convenient for, and the convenient distribution time slot of adjusting each T-CONT frame is realized the dynamic bandwidth adjustment.

Node in the multi-service transmission network framework is divided into two kinds of N node and S nodes, and the N node is common decentralized service access node, and the S node is except the function that possesses the N node, still and the node that docks of upper layer network.Business such as can be the directly traditional up and down TDM of any one node, Ethernet data business can also provide the PON tributary interface, and uplink service interfaces such as 10GE can also be provided at the S node.Multi-service transmission network loaded service type can have following three kinds: (1) fixed-bandwidth business, abbreviate FB class business as, and be mainly used in the business that the time-delay of carrying bandwidth guarantees, for example TDM, SDH/SONET or private line service etc.; (2) bandwidth guarantees business, abbreviates AB class business as, for example video, VOIP or special line etc.; (3) guarantee as possible professionally, abbreviate BE class business as, for example common business of networking etc.For AB class and BE class business, the multi-service transmission network is a kind of converying type network, and aggregation node is the S node, and this node is realized double copies.For FB class business, the multi-service transmission network is a kind of peer switch network, can be from business such as TDM, SDH/SONET about any one node or special lines.

In GPON and multi-service transfers net system, the TDM business is transmitted as a kind of important business.When GPON system transmissions TDM was professional, the source end was encapsulated in each road TDM business in the GEM frame, thereby makes every road TDM business all increase the GEM frame frame head expense of 5 bytes; When the source end encapsulates separately many groups TDM business, will cause byte overhead to be multiplied thus, and cause the transmission bandwidth utilance low.In the multi-service transfers net system, during TDM operation transmission, also exist and similar problem in the GPON system, cause the transmission bandwidth utilance low.

At above problem, the embodiment of the invention provides following technical scheme, many groups of same data types that the source end will receive and the TDM business datum that mails to one night end are encapsulated in the Frame, make that many group TDM business datums can a shared data frame head, and this Frame sent to Su Duan, after the place termination is received the Frame of source end transmission, this Frame decapsulation is got access to many group TDM business datums.Because the many groups of transmission TDM business datums can a shared data frame head, the byte overhead when having saved encapsulation and transmission makes when the many groups of transmission TDM are professional in GPON or multi-service transfers net system, can improve the utilance of transmission bandwidth.Wherein, the business datum in the embodiment of the invention is that example describes with the TDM business datum.Certainly, the embodiment of the invention is not limited to be applied in GPON or the multi-service transfers net system, for example: the embodiment of the invention can also be applied in other the system with PLI and PTI territory frame structure, is used for TDM operation transmission.

Fig. 2 is the flow chart of steps of the transmission processing method embodiment one of Frame of the present invention, and what present embodiment was described is the method that the source end is packaged into the TDM business datum that receives Frame and sends, and as shown in Figure 2, this method embodiment comprises:

Step 201, will mail to phase chummage end and with the N of data type group TDM business datum, be fitted to N respectively as valid data and transmit in the subchannel, each length of transmitting subchannel is identical, described N is a positive integer.

The TDM business is divided into polytype, and for example: speed is the T1 business of 1.544Mbit/S, speed is the E1 business of 2.048Mbit/S, speed is the E3 business of 34.368Mbit/S, speed is the STM-1 business of 155.52Mbit/S, speed is the Fast Ethernet business of the transparent transmission of bit of 125Mbit/S, speed is the G bit Ethernet service of the transparent transmission of bit of 1.25Gbit/S, speed is optical-fibre channel FC (Fiber Channel) 1G of 1Gbit/S, speed is the FC0.45G of 0.45Gbit/S, speed is that the business system of 200Mbit/S connects ESCON (Enterprise Systems Connection), speed is digital video broadcasting DVB (Digital Video Broadcast) of 216Mbit/S or the like; The TDM business datum of the professional corresponding respective type of the TDM of each type.

The source end comprises a plurality of TDM receiving ports that are used to receive the TDM business datum, one of them TDM receiving port receives a kind of TDM business datum, the source end can receive many group TDM business datums by these TDM receiving ports, and these TDM business datums are sent to a plurality of Su Duan.Sign according to each TDM receiving port, the source end can be judged the type of the TDM business datum that receives by this TDM receiving port, and the source end can also be known the Su Duan of this TDM receiving port correspondence, and wherein this Su Duan is meant the Su Duan that this TDM business datum need send to.

In the present embodiment, in order to organize TDM business datum time bandwidth-savings in transmission, the payload user data that the source end will encapsulate the Frame of TDM business datum carries out channelizing more, transmits many group TDM business datums in the Frame simultaneously to be implemented in.Wherein, the source end with the process that the payload user data of Frame carries out channelizing is: the source end is divided into isometric N transmission subchannel with the payload user data of Frame, each transmission subchannel can be used to carry the TDM business datum that a TDM receiving port receives as a data container; The source end is organized the TDM business datum with N and is fitted to respectively in N the transmission subchannel, makes the N group TDM business datum of N transmission in the subchannel when transmitting, can a shared data frame head, saved byte overhead.Because the equal in length of N transmission subchannel, and the standard transmission speed of the TDM business datum of same data type equates, it is the equal in length of transmission subchannel of the TDM business datum correspondence of same data type, and being uneven in length of the transmission subchannel of the TDM business datum correspondence of different types of data, for example: being uneven in length of the transmission subchannel that E1 is professional and the STM-1 business is corresponding, need be so be fitted to N the N group TDM business datum in the transmission subchannel respectively with data type; Also because N group TDM business datum sends to a Su Duan by a Frame,, N group TDM business datum holds so need mailing to one night.

The source end can have multiple in the mode of transmission adaptive TDM business datum as valid data in the subchannel, for example: the source end can be fitted to valid data in all data bit of transmission subchannel, also valid data can be fitted in the partial data position of transmission subchannel.When the source end is fitted to valid data in the partial data position of transmitting subchannel, can begin extracted valid data to indicate corresponding Su Duancong data designated position in the transmission subchannel by the sign position is set.

Step 202, N of valid data transmission subchannel arranged as payload user data, this payload user data is packaged into Frame, comprise the data frame head in this Frame with adaptive respectively; This data frame head comprises the length mark that is used to indicate the type identification of TDM traffic data type and is used for the designation data payload length.

Adaptive respectively N the transmission subchannel that valid data are arranged in the step 201 is packaged into Frame as payload user data with this payload user data, when being packaged into Frame, generates the data frame head according to this payload user data.This data frame head can be the length of 5 bytes, for example: can comprise in this data frame head: PLI (length is 12bit), Port ID (length is 12bit), PTI (length is 3bit) and HEC (length is 13bit); Wherein, PLI is the length mark of designation data payload length, promptly can know the total length of N transmission subchannel by PLI; Port ID is the port-mark of N TDM receiving port of source end, and source end or place end can be according to this Port ID in default memory spaces, the information of inquiring about each TDM receiving port; Increased the type identification of the TDM traffic data type that is used to indicate transmission among the PTI,, then can know the length of this transmission subchannel according to the type identification among the PTI because the length of transmission subchannel is corresponding with the TDM traffic data type.

Step 203, this Frame sent to the Su Duan of having known.

The transmission processing method of the Frame that the embodiment of the invention provides, phase chummage end will be mail to, and the N group TDM business datum with data type is fitted in N the transmission subchannel, and N transmission subchannel be encapsulated in the Frame as payload user data and transmit, make that N group TDM business datum can a shared frame head expense, just the payload user data with a Frame has been divided into N transmission subchannel, realized the payload user data channelizing of Frame, make and to transmit many groups TDM business datums of the same type in the Frame, save the byte overhead of the many groups of transmission TDM business datum, improved the utilance of transmission bandwidth.

Fig. 3 is the flow chart of steps of the receiving handling method embodiment one of Frame of the present invention, present embodiment is corresponding with the transmission processing method embodiment one of Frame of the present invention, what describe is that Su Duan is with the Frame decapsulation that receives, get access to the method for TDM business datum, as shown in Figure 3, this method embodiment comprises:

The Frame that step 301, reception sources end send with the Frame decapsulation, gets access to payload user data by the data frame head of resolving in this Frame; This data frame head comprises type identification that is used for the TDM traffic data type that the designation data payload transmits and the length mark that is used for the designation data payload length;

The place termination with this Frame decapsulation, gets access to payload user data by the data frame head in this Frame is resolved after receiving the Frame of source end transmission.This payload user data comprises adaptive N the transmission subchannel that valid data are arranged.Comprise in this data frame head: PLI, Port ID, PTI and HEC; Wherein, can know the length of payload user data, i.e. the total length of N transmission subchannel according to PLI; According to the type identification among the PTI, can know the type of the TDM business datum of this data frame transfer, and know the length of each transmission subchannel, wherein, the equal in length of each transmission subchannel.

Step 302, according to type identification, in payload user data, from the beginning obtain N the transmission subchannel; Each length of transmitting subchannel is identical, and described N is a positive integer;

Su Duan is known the byte length of each transmission subchannel according to the type identification among the PTI, in payload user data, from the beginning extracts each transmission subchannel of known byte length successively then.

Step 303, the N that obtains respectively as valid data from N transmission subchannel organize the TDM business datum.

After Su Duan extracts each transmission subchannel, from each transmission subchannel, obtain the TDM business datum.Because the mode difference of transmission adaptive TDM business datum as valid data in the subchannel, the mode of obtaining the TDM business datum from the transmission subchannel is also different, and for example: the place end can extract all data in the transmission subchannel, to obtain the TDM business datum; Su Duan also can be according to the sign position in the transmission subchannel, and the data bit of appointment begins to extract data from the transmission subchannel, to obtain the TDM business datum.Wherein, owing to the length of N the transmission subchannel that encapsulates in the Frame is identical, so it is identical to obtain the mode of TDM business datum in N the transmission subchannel that encapsulates from a Frame.

The receiving handling method of the Frame that the embodiment of the invention provides by a Frame decapsulation just being got access to many group TDM business datums, has been saved the byte overhead of the many groups of transmission TDM business datum, has improved the utilance of transmission bandwidth.

The embodiment of the invention also provides the Frame receiving handling method, and this method comprises the transmission processing method of arbitrary Frame that the embodiment of the invention provides and the receiving handling method of arbitrary Frame.

The transmission processing method of concrete Frame and the receiving handling method of Frame do not repeat them here referring to the detailed description among the preceding method embodiment.

The Frame receiving handling method that the embodiment of the invention provides, have with previous embodiment in the transmission processing method of the Frame that provides and the identical beneficial effect of receiving handling method of Frame.

In the transmission processing and receiving handling method of the Frame that the embodiment of the invention provides, with N organize the TDM business datum be fitted to N the transmission subchannel mode can be divided into following two kinds of situations:

First kind of situation: bit-envelope mode.Because receiving and send the speed of TDM business datum, the source termination has deviation, be that the data length that each frame period (125us) endogenous termination is received may be different with the data length of transmission, (see the calculating in the specific embodiment under this situation for details) as can be known by calculating, in every 125us, the deviation of the data length that the source termination is received or the data length of transmission and full-length mostly is ± 1bit most, if after the generation multiple deviation, may cause the original clock of professional transmission to lose or take place error of transmission.In order to alleviate the problems referred to above, avoid taking place repeatedly the transfer of data deviation after, the professional transmission lag or the mistake that may cause, present embodiment adopts the bit-envelope mode to transmit data.Be specially: source end setting comprises valid data origin identification position, adjusts the transmission subchannel of bit and subchannel payload user data, and wherein the length of subchannel payload user data equals full-length; The source end detects the data length that receives in every 125us, this data length is number of data bits, when the data bit number that receives during than the standard bits number 1bit of manying, when next Frame sends, valid data are placed on to adjust in bit and the subchannel payload user data and send, when the number of data bits that receives equates with standard bits quantity or during few 1bit, when next Frame sends, valid data are placed in the subchannel payload user data and send; The source end is provided with corresponding sign in valid data origin identification position simultaneously, is used to indicate Su Duan when receiving data, extracts valid data from correct position.

Below by specific embodiment, TDM operation transmission data under first kind of situation are elaborated, Fig. 4 is the flow chart of steps of TDM service data transmission method embodiment one of the present invention, present embodiment is to describe by GEM frame TDM operation transmission data instance in the GPON system, as shown in Figure 4, on the basis of Fig. 2 and embodiment shown in Figure 3, this method embodiment comprises:

Step 401, according to the type of TDM business datum, define the length of the transmission subchannel of every kind of TDM business datum correspondence.

Calculate the transmission subchannel and absorb the required number of bits of TDM business datum maximum frequency deviation, draw the quantity of required adjustment bit, wherein adjust bit and valid data origin identification position and be referred to as speed adjustment field; The fixing full-length by the TDM business datum of the length of transmission subchannel adds that speed adjusts field and form.Be example with the E1 business below, the length of calculating the transmission subchannel described:

The standard speed of the professional transmission of E1 is that every 125us transmits 32 bytes (being 256bit), i.e. the standard speed of the professional transmission of E1 is 2.048Mbit/S, and the maximum frequency deviation of the professional defined of E1 is ± 50ppm that the frequency deviation in the GPON system is defined as ± 4.6ppm.Suppose that the required adjustment bit of transmission subchannel is 1bit, then transmitting the maximum input rate that subchannel can carry is: (256 ± 1) bit* (1/125us) * (1-4.6ppm) ≈ 2.0559Mbit/S, wherein the deviation of 2.0559Mbit/S and 2.048Mbit/S is 3900ppm, because 3900ppm is greater than 50ppm, so transmission subchannel institute energy loaded service speed range has covered the frequency deviation region of E1 business.Above thus calculating as can be known only needs to be provided with the adjustment bit of 1bit in the transmission subchannel, can satisfy the maximum frequency deviation that absorbs the E1 business.When effective data fit in the adjustment bit, need in valid data origin identification position, indication information be set, this indication information need take 2bit, because the transmission subchannel must be the integral multiple of byte, so transmission E1 only needs the speed of a byte to adjust field when professional, full-length 32 bytes that the minimum length of promptly transmitting the transmission subchannel of E1 business equals the E1 business add that the speed of 1 byte adjusts field, totally 33 bytes.In like manner, the minimum length of the transmission subchannel of transmission STM-1 business equals speed adjustment field, totally 2431 bytes that professional corresponding full-length 2430 bytes of STM-1 add 1 byte.Wherein, this speed is adjusted in the field and is comprised the valid data origin identification position of 2bit and the adjustment bit of 1bit.

Step 402, by N the data receiving port (the Data Receiving port is that example describes with the TDM receiving port) of source end, receive N group TDM business datum respectively; N TDM receiving port is corresponding one by one with N transmission subchannel.

The source end is by N TDM receiving port, receives the N group and mails to phase chummage end and organize the TDM business datum with the N of data type.Wherein the TDM business datum that receives of each TDM receiving port is fitted in the transmission subchannel corresponding with this TDM receiving port by the source end.

The physical length (the actual bit speed of the every group of TDM business datum that promptly receives) of every group of TDM business datum that step 403, source end basis receive in a setting-up time, the N group TDM business datum with receiving is fitted to respectively in N the transmission subchannel; Wherein, this setting-up time can be data frame period, i.e. a 125us.The TDM business datum of every kind of data type, to full-length should be arranged, for example: in GPON system or the multi-service transfers net system, Frame is one-period with 125us, the transmission rate of E1 Business Data Standard is that 125us transmits 32 bytes, so the full-length of E1 business datum correspondence is 32 bytes, in like manner, the full-length of STM-1 business datum correspondence is 2430 bytes.Be example with the E1 business below, this step be elaborated:

Fig. 5 is the schematic diagram of the payload user data channelizing of GEM frame among the embodiment shown in Figure 4, as shown in Figure 5, each transmission subchannel comprises G byte and subchannel payload user data, comprise S1 territory, D1 territory and NC territory in the G byte, wherein G represents speed adjustment field, S1 represents valid data origin identification position, and D is for adjusting bit, and NC is the reservation bit position.The idiographic flow of step 403 is:

The source end is done benchmark with a certain phy clock, the line clock of GPON system for example, the actual bit speed of every group of E1 business datum that calculating receives, promptly add up the bit quantity of the actual input of E1 business datum in the Fixed Time Interval, this Fixed Time Interval is generally a track data in the frame period, i.e. 125us;

The source end compares the bit quantity of actual input in the 125us and the standard bit quantity of standard E1 business datum, draws the deviate of actual bit quantity and standard bit quantity;

The source end writes the S1 territory with this deviate, by aforementioned calculating as can be known, the deviate of E1 business datum is no more than a bit in 125us, the indication information of filling in the S1 territory has and can be the 3rd indication information and the 4th indication information thus, wherein the 3rd indication information can be 1 for 0 or-1, the four indication information; In the S1 territory, only need to use 2bit to represent deviate, yet because deviate is extremely important for place end clock recovery, in order to guarantee the accuracy of deviate, a plurality of deviates can be set in the S1 territory, three deviates for example are set, promptly in the S1 territory of 6bit, repeat to write the deviate of three 2bit; When the place termination is received this deviate, adopt the method for majority vote, when receiving the identical deviate of two or more, Su Duan thinks and receives correct deviate, otherwise Su Duan thinks the deviate mistake that receives, and then to get deviate be 0 to Su Duan or abandon data in this transmission subchannel;

The source end is fitted to the bit number of the actual input of E1 business datum in the GEM frame, if the deviate of actual bit quantity and standard bit quantity is 1, then first effective bit of E1 business datum packed in the D1 territory of transmitting subchannel, being about to the E1 business datum packs in the D1 territory and subchannel payload user data in the transmission subchannel, and fill in 1 in the S1 territory, as the 4th indication information; If deviate is-1, behind the D1 territory of transmitting subchannel second then packs first effective bit of E1 business datum into, perhaps first effective bit of E1 business datum packed into first (last bit data of transmitting subchannel neutron channel data payload this moment is invalid) behind the D1 territory of transmitting subchannel, and fill in-1 in the S1 territory, as the 3rd indication information; If deviate is 0, behind the D1 territory of transmitting subchannel of then first effective bit of E1 business datum being packed into first, be about to the E1 business datum pack into the isometric subchannel payload user data of full-length in, and fill in 0, as the 3rd indication information in the S1 territory.

Step 404, source end will the adaptive respectively TDM of having business datum, go to one night end N transmission subchannel as the payload user data of GEM frame, this payload user data is packaged into the GEM frame, when being packaged into the GEM frame, according to payload user data generation data frame head; Wherein,, in the PTI of the data frame head of GEM frame, increase type identification, with the type of the TDM business datum of indicating this GEM frame transmission according to the type of TDM business datum in this payload user data; According to the type sign, can obtain the length of transmission subchannel in this GEM frame.Comprise in this data frame head: PLI, Port ID, PTI and HEC (as shown in Figure 5).

Step 405, source end send to corresponding Su Duan with this GEM frame.

After step 406, place termination are received the GEM frame, the GEM frame is carried out decapsulation, get access to payload user data by the data frame head of resolving in the GEM frame.

Step 407, Su Duan judge the type of TDM business datum in the payload user data according to the type identification among the PTI of data frame head, take out N transmission subchannel in conjunction with the PLI value, recover the TDM business datum.For the GEM frame of the many groups of transmission E1 business datum, because PLI equals n*33, so start anew in the payload user data of GEM frame, per 33 bytes are taken out a transmission subchannel.The process that recovers the TDM business datum from each transmission subchannel is as follows: the place end adopts the method for majority vote to receive the deviate of transmitting in the S1 territory, and orients first effective bit of the TDM business datum in the transmission subchannel according to deviate; Su Duan will receive effective TDM business datum from the transmission subchannel, deposit in to send in the buffer memory.

Step 408, Su Duan organize the TDM business datum by the N that N data transmit port sends respectively in the buffer memory.

Described N data transmit port is corresponding one by one with N transmission subchannel.Su Duan stores the N that gets access in the step 407 group TDM business datum respectively in N the corresponding memory space, then by with N transmission subchannel N data transmit port one to one, the N in N the memory space is organized the TDM business datum sends.Su Duan includes and N transmission subchannel N data transmit port one to one, the TDM business datum of each transmission subchannel transmission, send by the data sending terminal mouth corresponding with this transmission subchannel transmission, each data sending terminal mouth mails to the destination corresponding with this data sending terminal mouth.In the GPON system, the N of source end TDM receiving port is corresponding one by one with N transmission subchannel, and N data transmit port with Su Duan is corresponding one by one again for N transmission subchannel; Each TDM receiving port and transmission subchannel and with the corresponding relation of data sending terminal mouth, set in advance in a memory space; The place end can be according to the Port ID in the GEM frame head, from this memory space, inquire each TDM receiving port and transmission subchannel and with the corresponding relation of data sending terminal mouth.

Su Duan is when sending the TDM business datum by N data transmit port, the Frame clock that uses circuit to receive, produce the even time interval (125us), Fixed Time Interval with 125us, monitoring sends the bit quantity in the buffer memory, does adaptive clock recovery and data flow output with monitoring result again; Detailed process is: (a) on each 125us time point, inquiry and record send the bit quantity in the buffer memory; (b) when the bit of this inquiry quantity equals the bit quantity of inquiry last time, illustrate that the transmission data flow of place end TDM port and the speed of source end TDM port receiving data stream equate that the place end continues the present transmission rate of maintenance; When the bit quantity of the bit of this inquiry quantity unnecessary last time of inquiry, illustrate that the transmission data flow of place end TDM port is slower than the speed of source end TDM port receiving data stream, need heighten the transmission rate of place end TDM port; When the bit of this inquiry quantity is less than the bit quantity of inquiry last time, illustrate that the transmission data flow of place end TDM port is faster than the speed of source end TDM port receiving data stream, need turn down the transmission rate of Su Duan.

In the GPON system, suppose that each ONU inserts 16 E1 business, when the method for then using present embodiment to provide is transmitted, compare with conventional method, can save 11.5% bandwidth, improve bandwidth availability ratio; And bandwidth availability ratio will increase along with the TDM business that ONU inserts and lifting at double, make that under the situation of same band the method that present embodiment provides can provide more TDM service accessibility than conventional method.

The TDM service data transmission method that the embodiment of the invention provides, can be applied in the GPON system, the source end will mail to phase chummage end, and the N group TDM business datum with data type is fitted in N the transmission subchannel, N transmission subchannel is encapsulated in the Frame as payload user data, and this Frame sent to Su Duan, Su Duan carries out getting access to N group TDM business datum after the corresponding decapsulation, can a shared frame head expense when this method makes the many groups of transmission TDM business datum, just the payload user data with a Frame has been divided into N transmission subchannel, realized the payload user data channelizing of Frame, make and to transmit many groups TDM business datums of the same type in the Frame, save the byte overhead of the many groups of transmission TDM business datum, improved the utilance of transmission bandwidth.Except above-mentioned beneficial effect, present embodiment makes and use the fixing bit-envelope mode of payload user data length in the GEM frame also by increase to adjust bit in the transmission subchannel, the clock performance when having improved in GPON system TDM operation transmission data.When TDM operation transmission, when the GPON system adopted the adaptive clock recovery technology, the height of the synchronization clock mass of its recovery depended on that the place termination receives time uniformity coefficient and each variable quantity that receives data of data; When the place end time receives the data of very little variable quantity uniformly, with regard to the high-quality synchronised clock that recovers of energy, promptly for the high-quality synchronised clock that recovers, just require the place termination to receive that the time of GEM frame is even, and the equal in length or the length variations of payload user data is as far as possible little in each GEM frame.Thus, the embodiment of the invention is used the fixing bit-envelope mode of payload user data length in the GEM frame, makes the high-quality synchronised clock that recovers of Su Duanneng, has increased the reliability of TDM business data transmission.

Second kind of situation is: the byte packaged type.The problem that will alleviate with first kind of situation is identical, and after the transfer of data deviation took place repeatedly, error of transmission is lost or taken place to the professional original clock that may cause, and present embodiment adopts the byte packaged type to transmit data.Be specially: the deviation of the data length that the endogenous termination of every 125us is received or the data length of transmission and full-length mostly is ± 1bit (referring to the description among the embodiment of first kind of situation) most, when the data of deviation are accumulated to certain quantity, the data of deviation are sent together.Data length with the data length overgauge that receives is that example describes below, the byte packaged type is specially: end every 125us in source sends out the business datum of full-length, the 1bit deposit data that every 125us is received more are in buffer memory then, when the data length of depositing in the buffer memory was Duoed 1 byte with the current data sum that receives than full-length, the source end encapsulated data in the buffer memory and the current data that receive together and sends.Under this situation, the length of the transmission subchannel that the source end is provided with is greater than the full-length of business datum, so that 1 unnecessary byte data can be fitted in the transmission subchannel, and also be provided with valid data origin identification position in this transmission subchannel, in order to the original position of indication valid data in the transmission subchannel, this transmission subchannel comprises thus: valid data origin identification position, adjustment byte position and subchannel payload user data.

Below by specific embodiment, TDM operation transmission data under second kind of situation are elaborated, Fig. 6 is the flow chart of steps of TDM service data transmission method embodiment two of the present invention, present embodiment is to describe by GEM frame TDM operation transmission data instance in the GPON system, as shown in Figure 6, on the basis of Fig. 2 and embodiment shown in Figure 3, this method embodiment comprises:

Step 601, by N TDM receiving port of source end, receive N group TDM business datum respectively; N TDM receiving port is corresponding one by one with N transmission subchannel.

Step 602, source end are fitted to the N group TDM business datum that receives respectively in N the transmission subchannel.Fig. 7 is the schematic diagram of the payload user data channelizing of GEM frame among the embodiment shown in Figure 6, as shown in Figure 7, each GEM frame comprises a data frame head and payload user data, comprise N transmission subchannel in the payload user data, each transmission subchannel comprises: valid data origin identification position S2, adjustment byte D2 and subchannel payload user data; Adjust the byte position and can be arranged on before the subchannel payload user data, valid data origin identification position can be arranged on to be adjusted before the byte; The idiographic flow of this step is:

When the physical length of the every group of TDM business datum that in a setting-up time, receives during greater than the full-length of this TDM traffic data type correspondence, wherein this setting-up time can be a data frame period (125us), from the beginning the source end obtains the part TDM business datum isometric with full-length in this group TDM business datum, and the part TDM business datum that will get access to is fitted in the subchannel payload user data of corresponding transmission subchannel, and wherein the length of subchannel payload user data and full-length are isometric; Part TDM business datum remaining in this group TDM business datum is stored in the buffer memory;

The source end is provided with first indication information in the valid data origin identification position of this transmission subchannel, this first indication information is used for indicating the valid data of this transmission subchannel to fit in the subchannel payload user data;

Then, the source end receives the part TDM business datum of the remainder of storing in the buffer memory and following one-period by same TDM receiving port TDM business datum, as a whole and from the beginning obtain the part TDM business datum isometric with full-length, and it is fitted in the subchannel payload user data in the same transmission subchannel of next GEM frame, the rest may be inferred, when the length sum of the TDM business datum that receives by same TDM receiving port until the part TDM of remainder business datum and following one-period is Duoed a byte than full-length, with the part TDM business datum of remainder and following one-period by the TDM business datum that same TDM receiving port receives, be fitted to together in the adjustment byte and subchannel payload user data in the same transmission subchannel of next TDM frame; And the source end is provided with second indication information in valid data origin identification position, and this second indication information is used for indicating the valid data of this transmission subchannel to be stored in adjustment byte position and the subchannel payload user data; Wherein valid data origin identification position and adjustment byte position can take 1 byte respectively.

Step 603, source end will adaptively respectively have N transmission subchannel of valid data as payload user data, and this payload user data is packaged into the GEM frame, when being packaged into the GEM frame, generate the data frame head according to payload user data.

Step 604, this GEM frame of source end send to corresponding Su Duan.

After step 605, place termination are received the GEM frame, the GEM frame is carried out decapsulation, get access to payload user data by the data frame head of resolving in the GEM frame.

Step 606, Su Duan are known the byte length of each transmission subchannel according to the type identification among the PTI in the data frame head, from the beginning extract N transmission subchannel then in payload user data.

Step 607, Su Duan obtain the TDM business datum as valid data according to the indication information in the valid data origin identification position in the transmission subchannel; When being first indication information in effective data origin identification position, obtain the TDM business datum in the Su Duancong subchannel payload user data; When being second indication information in effective data origin identification position, Su Duancong adjusts the byte position and begins to obtain the TDM business datum of adjusting in byte position and the subchannel payload user data.

Step 608, Su Duan send N group TDM business datum respectively by N data transmit port.

Present embodiment is that the data length with the data length overgauge that receives in setting-up time is that example describes, when the data length that in setting-up time, receives during less than the data length of standard, for example, when the data length that receives in 125us lacks 1bit than full-length, then obtain the data of 1bit the data that the source end receives in following one-period (125us), in the subchannel payload user data that the data that receive in these 1bit data and this cycle are adaptive together and full-length is isometric, the source end is formed remaining data in following one-period and the partial data that obtains and the isometric data of full-length from the data of following one-period again then, be fitted to the isometric subchannel payload user data of full-length in, the rest may be inferred, when remaining data are lacked a byte than full-length in following one-period, first significance bit of data that receives is fitted in first byte in the subchannel payload user data (at this moment, last byte in the subchannel payload user data is invalid) or first significance bit of the data that receive be fitted in second byte in the subchannel payload user data, and in valid data origin identification position, corresponding indication information is set, is used for indicating the valid data of this transmission subchannel to be stored in start-stop position in the subchannel payload user data.

The TDM service data transmission method that the embodiment of the invention provides, except beneficial effect with TDM service data transmission method embodiment one of the present invention, also adjust the byte position by in the transmission subchannel, increasing, when making in the GPON system TDM operation transmission data, improve the performance of the synchronised clock of GPON system restoration, increased the reliability of TDM business data transmission.

Fig. 4 of the present invention is to embodiment shown in Figure 7, be to be the specific descriptions that example is carried out with the GPON system, in the GPON system, the N of source end TDM receiving port is corresponding one by one with N transmission subchannel, N data transmit port with Su Duan is corresponding one by one again for N transmission subchannel, just, the data that certain TDM receiving port of source end receives, the fixing data sending terminal mouth corresponding with this TDM receiving port by Su Duan sends; Wherein, each TDM receiving port and transmission subchannel and with the corresponding relation of data sending terminal mouth, set in advance in a memory space; The place end can be according to the Port ID in the GEM frame head, from this memory space, inquire each TDM receiving port and transmission subchannel and with the corresponding relation of data sending terminal mouth.Thus, when certain TDM receiving port does not receive TDM when professional, transmitting accordingly at the GEM frame does not just have padding data in the subchannel, and promptly some byte in the GEM frame does not have padding data.

And when the embodiment of the invention is applied in the other system, when for example being applied in the multi-service transfers net system, because N TDM receiving port of source end do not need corresponding one by one with N transmission subchannel, N transmission subchannel do not need corresponding one by one with N the data transmit port of Su Duan yet, so adopt Fig. 4 to method shown in Figure 7, when some byte in Frame occurring does not have padding data, can cause the waste of byte in the Frame.For fear of such waste, the embodiment of the invention is on the basis of the foregoing description, the Frame of another kind of packing forms is provided, the difference of this Frame and aforesaid GEM frame is: in the transmission subchannel of Frame, increased the transmit port indicating bit, this transmit port indicating bit is used for setting and sends sequence number, and this sends sequence number corresponding with the data sending terminal mouth of Su Duan, is used to indicate Su Duan to send corresponding TDM business datum according to this corresponding data sending terminal mouth that sends sequence number; Except that increasing the transmit port indicating bit at the transmission subchannel, the source end sends TDM business datum and Su Duan and recovers the method for TDM business datum identical with in the GPON system.Below with the example that is applied as in the multi-service transfers net system, the payload user data channelizing and the transmission method thereof of the Frame of above-mentioned packing forms is elaborated.

In the multi-service transfers net system, Frame is the E-GEM frame.Fig. 8 is the schematic diagram of the payload user data channelizing of E-GEM frame in the embodiment of the invention.As shown in Figure 8, the difference of E-GEM frame and GEM frame shown in Figure 7 is: increased transmit port indicating bit (Num position) in (1) transmission subchannel; (2) comprise in the data frame head of E-GEM frame: PLI, TI ID, Seq, ePTI, PTI and HEC; Wherein PLI and HEC are equivalent to PLI shown in Fig. 7 and HEC; TI ID and Seq represent port-mark, are equivalent to the Port ID shown in Fig. 7; EPTI and PTI are equivalent to the PTI shown in Fig. 7.

Using the embodiment of the invention, similar to the method among the embodiment shown in Figure 7 by method and Fig. 4 of the many groups of E-GEM frame transmission TDM business datum, below only describe distinctive points: the source end is organized the TDM business datum with N and is fitted to transmission during subchannel, in the Num position of each transmission subchannel, be provided with and send sequence number, send sequence number according to this with indication Su Duan and to select corresponding data sending terminal mouth to send data in this transmission subchannel, just the corresponding relation between the data sending terminal mouth of the TDM receiving port of source end and Su Duan is indicated by sending sequence number; After the place termination is received the E-GEM frame, earlier by the port-mark in the data frame head, find the scope at this corresponding data sending terminal mouth place that sends sequence number, in this scope, find the data sending terminal mouth corresponding according to sending sequence number and send corresponding data then with it.

When using E-GEM frame shown in Figure 8 to send the TDM business datum, send sequence number owing to include in the transmission subchannel, make different transmission subchannel in the E-GEM frame same position in can multiplexing E-GEM frame data payload, for example: the business datum in the transmission subchannel 1, data sending terminal mouth 1 by Su Duan sends to destination 1, business datum in the transmission subchannel 2, data sending terminal mouth 2 by Su Duan sends to destination 2, because the data sending terminal mouth of transmission subchannel and Su Duan, and with the corresponding relation of destination with the expression that sends sequence number, so transmission subchannel 1 and transmission subchannel 2 are in E-GEM frame data payload, can place the same payload section near frame head, this moment, Su Duan distinguished different transmission subchannels by sending sequence number in the transmission subchannel.

Use E-GEM frame shown in Figure 8 to send the embodiment of TDM business datum, except having the beneficial effect that has embodiment illustrated in fig. 4, also send sequence number by in the transmission subchannel, being provided with, guaranteed all adaptive TDM of having business datum in each transmission subchannel, avoided when certain TDM receiving port does not receive the TDM business datum, the waste of byte in the Frame.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.

Fig. 9 is the structural representation of the transmission processing unit embodiment one of Frame of the present invention, the transmission processing unit of the Frame in the present embodiment is equivalent to the source end among the preceding method embodiment, as shown in Figure 9, the transmission processing unit of this Frame comprises: path adaptation module 11, Frame package module 13 and Frame sending module 15.

Path adaptation module 11 be used for mail to phase chummage end and with the N of data type group business datum, be fitted to N respectively as valid data and transmit in the subchannel, each length of transmitting subchannel is identical, described N is a positive integer.Frame package module 13 is used for having N of described valid data to transmit subchannel as payload user data with adaptive respectively, and described payload user data is packaged into Frame, comprises the data frame head in the described Frame; Described data frame head comprises the length mark that is used to indicate the type identification of traffic data type and is used for the designation data payload length.Frame sending module 15 is used for Frame is sent to Su Duan.

Path adaptation module 11 will mail to phase chummage end and with the N of data type group business datum, be fitted to N respectively as valid data and transmit in the subchannel; Frame package module 13 as payload user data, is packaged into Frame with this payload user data with N of path adaptation module 11 adaptive mistakes transmission subchannel, generates the data frame head according to this payload user data when being packaged into Frame; Frame sending module 15 sends to Su Duan with Frame.

The operation principle of each module and workflow do not repeat them here referring to the description among each method embodiment of the present invention in the present embodiment.

The transmission processing unit of the Frame that the embodiment of the invention provides, will be by mailing to phase chummage end, and the N group TDM business datum with data type is fitted in N the transmission subchannel, and N transmission subchannel be encapsulated in the Frame as payload user data and transmit, make that N group TDM business datum can a shared frame head expense, just the payload user data with a Frame has been divided into N transmission subchannel, realized the payload user data channelizing of Frame, make and to transmit many groups TDM business datums of the same type in the Frame, save the byte overhead of the many groups of transmission TDM business datum, improved the utilance of transmission bandwidth.

Figure 10 is the structural representation of the transmission processing unit embodiment two of Frame of the present invention, as shown in figure 10, on the basis of the transmission processing unit embodiment one of Frame of the present invention, the path adaptation module 11 of the transmission processing unit of this Frame can comprise following any one group of unit or its combination: first group: first data capture unit 1101, first adaptation unit 1103 and second adaptation unit 1105; Second group: second data capture unit 1107 and first is provided with unit 1109.

First data capture unit 1101 is used for from the beginning obtaining the partial service data isometric with full-length when the physical length of the every group of business datum that receives during greater than the full-length of traffic data type correspondence in business datum in a setting-up time.The partial service data that first adaptation unit 1103 is used for that first data capture unit is obtained are fitted in corresponding transmission subchannel and the isometric subchannel payload user data of full-length; And in the valid data origin identification position that transmission is provided with in the subchannel, be provided for first indication information of indicating the valid data in the transmission subchannel to begin from the subchannel payload user data.Second adaptation unit 1105 is used for the business datum that the partial service data of remainder that buffer memory is stored and following one-period receive by same Data Receiving port, as a whole and from the beginning obtain with the isometric partial service data of full-length and be fitted in the subchannel payload user data in the same transmission subchannel of next Frame, the rest may be inferred, when the length sum of the business datum that receives by same Data Receiving port until the partial service data of remainder and following one-period is Duoed a byte than full-length, the business datum that the partial service data of remainder and following one-period are received by same Data Receiving port, be fitted to together in the adjustment byte position and subchannel payload user data before the same transmission subchannel neutron channel data payload of next Frame, and be provided for indicating valid data in the transmission subchannel in the valid data origin identification position that in the transmission subchannel, is provided with from adjusting second indication information that the byte position begins.

Second data capture unit 1107 is used for the physical length according to the every group of described business datum that receives in a setting-up time, with business datum be fitted in the transmission subchannel with the isometric subchannel payload user data of full-length in, perhaps business datum is fitted in the adjustment bit and subchannel payload user data of transmission in the subchannel.First is provided with unit 1109 is used for being provided for indicating in the valid data origin identification position that the transmission subchannel is provided with transmitting the 3rd indication information that the valid data in the subchannel begin from the subchannel payload user data, perhaps is provided for the 4th indication information of indicating the valid data in the transmission subchannel to begin from the adjustment bit in the valid data origin identification position that is provided with in the transmission subchannel.

The transmission processing unit of the Frame that the embodiment of the invention provides can also comprise N data receiving port, and the path adaptation module can also comprise: sequence number is provided with the unit.

N data receiving port is used for receiving respectively N group business datum.Described N data receiving port can be corresponding one by one with N transmission subchannel.

When described N data receiving port do not transmit subchannel one by one at once with N, can also comprise the transmit port indicating bit in the transmission subchannel.Sequence number is provided with the unit and is used for being provided with and sending sequence number in the transmit port indicating bit of transmission subchannel; Send sequence number and be used to indicate Su Duan to select corresponding data sending terminal mouth to send valid data according to sending sequence number.

The operation principle of each module and unit and workflow do not repeat them here referring to the description among each method embodiment of the present invention in the present embodiment.

The transmission processing unit of the Frame that the embodiment of the invention provides, except the beneficial effect of the transmission processing unit embodiment one of Frame of the present invention, also adjust bit or adjust the byte position by in the transmission subchannel, increasing, make and in Frame, use the fixing packaged type of payload user data length, clock performance when having improved the TDM operation transmission data has increased the reliability of TDM business data transmission; And send sequence number by being provided with in the subchannel in transmission, guaranteed to transmit all adaptive TDM business datum in the subchannel at each, avoided when certain TDM receiving port does not receive the TDM business datum, the waste of byte in the Frame.

Figure 11 is the structural representation of the receiving and processing device embodiment one of Frame of the present invention, the receiving and processing device of the Frame in the present embodiment is equivalent to the Su Duan among the preceding method embodiment, as shown in figure 11, the receiving and processing device of this Frame comprises: decapsulation module 21, passage acquisition module 23 and data acquisition module 25.

Decapsulation module 21 is used for the Frame that the reception sources end sends, and with the Frame decapsulation, gets access to payload user data by the data frame head of resolving in the described Frame; The data frame head comprises type identification that is used for the traffic data type that the designation data payload transmits and the length mark that is used for the designation data payload length.Passage acquisition module 23 is used for the type identification that gets access to according to decapsulation module 21, from the beginning obtains N transmission subchannel in payload user data; Wherein, each length of transmitting subchannel is identical, and described N is a positive integer.Data acquisition module 25 is used for organizing business datum from the N that N the transmission subchannel that passage acquisition module 23 gets access to obtains respectively as valid data.

The receiving and processing device of the Frame that the embodiment of the invention provides by a Frame decapsulation just being got access to many group TDM business datums, has been saved the byte overhead of the many groups of transmission TDM business datum, has improved the utilance of transmission bandwidth.

Figure 12 is the structural representation of the receiving and processing device embodiment two of Frame of the present invention, as shown in figure 12, on the basis of the receiving and processing device embodiment one of Frame of the present invention, the data acquisition module 25 of the receiving and processing device of this Frame can comprise: the 3rd data capture unit 251 and the 4th data capture unit 253.

Indication information in the valid data origin identification position that the 3rd data capture unit 251 is used for being provided with according to each transmission subchannel obtains the N group business datum as valid data in the subchannel payload user data that is provided with from the transmission subchannel.

Indication information in the valid data origin identification position that the 4th data capture unit 253 is used for being provided with according to each transmission subchannel, the adjustment position that is provided with from the transmission subchannel begin to obtain the N group business datum as valid data.

The receiving and processing device of the Frame that the embodiment of the invention provides can also comprise N data transmit port and port selection module.

N data transmit port is used for sending respectively N group business datum; Described N data transmit port can be corresponding one by one with N transmission subchannel.

When described N data transmit port do not transmit subchannel one by one at once with N, port selects module to select to send valid data with the data sending terminal mouth that sends sequence number corresponding according to sending sequence number of being provided with in the transmit port indicating bit that is provided with in the transmission subchannel.

The embodiment of the invention also provides a kind of transmission process system of Frame, and the transmission process system of this Frame comprises as the transmission processing unit of Fig. 9 or Frame shown in Figure 10 with as the receiving and processing device of Figure 11 or Frame shown in Figure 12.

The operation principle of each module and unit and workflow do not repeat them here referring to the description among each method embodiment of the present invention in the transmission process system of Frame of the present invention.

The transmission process system of a kind of Frame that the embodiment of the invention provides, phase chummage end will be mail to, and the N group TDM business datum with data type is fitted in N the transmission subchannel, and N transmission subchannel be encapsulated in the Frame as payload user data and transmit, make that N group TDM business datum can a shared frame head expense, just the payload user data with a Frame has been divided into N transmission subchannel, realized the payload user data channelizing of Frame, make and to transmit many groups TDM business datums of the same type in the Frame, save the byte overhead of the many groups of transmission TDM business datum, improved the utilance of transmission bandwidth; And the clock performance in the time of can improving the TDM operation transmission data has increased the reliability of TDM business data transmission

It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims

1. the transmission processing method of a Frame is characterized in that, comprising:

Described Frame is sent to described Su Duan.

2. the transmission processing method of Frame according to claim 1 is characterized in that, described will mail to phase chummage end and with the N of data type group business datum, be fitted to N respectively as valid data and transmit in the subchannel and comprise:

When the physical length of the every group of described business datum that in a setting-up time, receives during greater than the full-length of described traffic data type correspondence, in described business datum, from the beginning obtain the partial service data isometric with full-length, and be fitted in the corresponding transmission subchannel with the isometric subchannel payload user data of full-length in; And first indication information that is provided for indicating the valid data in the described transmission subchannel to begin in the valid data origin identification position that in described transmission subchannel, is provided with from described subchannel payload user data;

The business datum that the partial service data of the remainder of storing in the buffer memory and following one-period are received by same Data Receiving port, as a whole and from the beginning obtain with the isometric partial service data of full-length and be fitted in the subchannel payload user data in the same transmission subchannel of next Frame, the rest may be inferred, when the length sum of the business datum that receives by same Data Receiving port until the partial service data of remainder and following one-period is Duoed a byte than described full-length, the business datum that the partial service data of remainder and following one-period are received by same Data Receiving port, be fitted to together in the adjustment byte position and described subchannel payload user data before the same transmission subchannel neutron channel data payload of next Frame, and second indication information that is provided for indicating the valid data in the described transmission subchannel to begin from described adjustment byte position in the valid data origin identification position that in described transmission subchannel, is provided with.

3. the transmission processing method of Frame according to claim 1 is characterized in that, described will mail to phase chummage end and with the N of data type group business datum, be fitted to N respectively as valid data and transmit in the subchannel and comprise:

Physical length according to the every group of described business datum that in a setting-up time, receives, with described business datum be fitted in the described transmission subchannel with the isometric subchannel payload user data of full-length in, and the 3rd indication information that is provided for indicating the valid data in the described transmission subchannel to begin in the valid data origin identification position that in described transmission subchannel, is provided with from described subchannel payload user data; Perhaps described business datum is fitted in the adjustment bit and described subchannel payload user data in the described transmission subchannel, and the 4th indication information that is provided for indicating the valid data in the described transmission subchannel to begin from described adjustment bit in the valid data origin identification position that in described transmission subchannel, is provided with.

4. according to the transmission processing method of the arbitrary described Frame of claim 1 to 3, it is characterized in that, described will mail to phase chummage end and with the N of data type group business datum, as valid data be fitted to respectively N transmit in the subchannel before, also comprise:

By N data receiving port of source end, receive described N group business datum respectively, described N data receiving port is corresponding one by one with described N transmission subchannel.

5. the transmission processing method of Frame according to claim 4 is characterized in that, described data frame head also comprises the port-mark of the Data Receiving port that is used to identify described source end.

6. according to the transmission processing method of the arbitrary described Frame of claim 1 to 3, it is characterized in that, described will mail to phase chummage end and with the N of data type group business datum, be fitted to respectively in N the process of transmitting in the subchannel as valid data and also comprise:

Be provided with in the transmit port indicating bit in described transmission subchannel and send sequence number, be used to indicate Su Duan to select corresponding data sending terminal mouth to send described business datum according to described sending sequence number.

7. the receiving handling method of a Frame is characterized in that, comprising:

8. the receiving handling method of Frame according to claim 7 is characterized in that, the described N group business datum of obtaining respectively from described N transmission subchannel as valid data comprises:

According to the indication information in the valid data origin identification position that is provided with in each transmission subchannel, obtain the N group business datum as valid data in the subchannel payload user data that is provided with from described transmission subchannel, perhaps the adjustment position that is provided with from described transmission subchannel begins to obtain the N group business datum as valid data.

9. according to the receiving handling method of claim 7 or 8 described Frames, it is characterized in that, after the described N group business datum of from described N transmission subchannel, obtaining respectively as valid data, also comprise:

Send described N group business datum respectively by N data transmit port, described N data transmit port is corresponding one by one with described N transmission subchannel.

10. according to the receiving handling method of claim 7 or 8 described Frames, it is characterized in that, after the described N group business datum of from described N transmission subchannel, obtaining respectively as valid data, also comprise:

According to sending sequence number of being provided with in the transmit port indicating bit that is provided with in the described transmission subchannel, select the described corresponding data sending terminal mouth that sends sequence number to send described business datum.

11. the method for transmission processing of a Frame comprises as the transmission processing method of the arbitrary described Frame of claim 1 to 6 with as the receiving handling method of the arbitrary described Frame of claim 7 to 10.

12. the transmission processing unit of a Frame is characterized in that, comprising:

13. the transmission processing unit of Frame according to claim 12 is characterized in that, described path adaptation module comprises:

First data capture unit, be used in described business datum, from the beginning obtaining the partial service data isometric with full-length when the physical length of the every group of described business datum that in a setting-up time, receives during greater than the full-length of described traffic data type correspondence;

First adaptation unit is used for the partial service data that described first data capture unit obtains are fitted in corresponding transmission subchannel and the isometric subchannel payload user data of full-length; And first indication information that is provided for indicating the valid data in the described transmission subchannel to begin in the valid data origin identification position that in described transmission subchannel, is provided with from described subchannel payload user data;

Second adaptation unit, be used for the business datum that the partial service data of remainder that buffer memory is stored and following one-period receive by same Data Receiving port, as a whole and from the beginning obtain with the isometric partial service data of full-length and be fitted in the subchannel payload user data in the same transmission subchannel of next Frame, the rest may be inferred, when the length sum of the business datum that receives by same Data Receiving port until the partial service data of remainder and following one-period is Duoed a byte than described full-length, the business datum that the partial service data of remainder and following one-period are received by same Data Receiving port, be fitted to together in the adjustment byte position and described subchannel payload user data before the same transmission subchannel neutron channel data payload of next Frame, and second indication information that is provided for indicating the valid data in the described transmission subchannel to begin from described adjustment byte position in the valid data origin identification position that in described transmission subchannel, is provided with.

14. the transmission processing unit of Frame according to claim 12 is characterized in that, described path adaptation module comprises:

Second data capture unit, be used for physical length according to the every group of described business datum that in a setting-up time, receives, with described business datum be fitted in the described transmission subchannel with the isometric subchannel payload user data of full-length in, perhaps described business datum is fitted in the adjustment bit and described subchannel payload user data in the described transmission subchannel;

First is provided with the unit, be used for the 3rd indication information that in the valid data origin identification position that described transmission subchannel is provided with, is provided for indicating the valid data in the described transmission subchannel to begin, the 4th indication information that is provided for indicating the valid data in the described transmission subchannel to begin in the valid data origin identification position that perhaps in described transmission subchannel, is provided with from described adjustment bit from described subchannel payload user data.

15. the transmission processing unit according to the arbitrary described Frame of claim 12-14 is characterized in that, also comprises:

N data receiving port is used for receiving respectively described N group business datum; Described N data receiving port is corresponding one by one with described N transmission subchannel.

16. the transmission processing unit according to the arbitrary described Frame of claim 12-14 is characterized in that, described path adaptation module also comprises:

Sequence number is provided with the unit, is used for being provided with in the transmit port indicating bit of described transmission subchannel sending sequence number; Described sending sequence number is used to indicate Su Duan to select corresponding data sending terminal mouth to send described business datum according to described sending sequence number.

17. the receiving and processing device of a Frame is characterized in that, comprising:

18. the receiving and processing device of Frame according to claim 17 is characterized in that, described data acquisition module comprises:

The 3rd data capture unit, the indication information in the valid data origin identification position that is used for being provided with according to each transmission subchannel obtains the N group business datum as valid data in the subchannel payload user data that is provided with from described transmission subchannel;

The 4th data capture unit, the indication information in the valid data origin identification position that is used for being provided with according to each transmission subchannel, the adjustment position that is provided with from described transmission subchannel begins to obtain the N group business datum as valid data.

19. the receiving and processing device according to claim 17 or 18 described Frames is characterized in that, also comprises:

N data transmit port is used for sending respectively described N group business datum; Described N data transmit port is corresponding one by one with described N transmission subchannel.

20. the receiving and processing device according to claim 17 or 18 described Frames is characterized in that, also comprises:

Port is selected module, and what be provided with in the transmit port indicating bit that is used for being provided with according to described transmission subchannel sends sequence number, and selects the described corresponding data sending terminal mouth that sends sequence number to send described business datum.

21. the transmission process system of a Frame comprises as the transmission processing unit of the arbitrary described Frame of claim 12 to 16 with as the receiving and processing device of the arbitrary described Frame of claim 17 to 20.