CN101567842B - Method, device and system for transmitting and receiving service data - Google Patents

Method, device and system for transmitting and receiving service data Download PDF

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Publication number
CN101567842B
CN101567842B CN2008100950263A CN200810095026A CN101567842B CN 101567842 B CN101567842 B CN 101567842B CN 2008100950263 A CN2008100950263 A CN 2008100950263A CN 200810095026 A CN200810095026 A CN 200810095026A CN 101567842 B CN101567842 B CN 101567842B
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China
Prior art keywords
gem frame
frame head
business datum
internal layer
service
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Expired - Fee Related
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CN2008100950263A
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CN101567842A (en
Inventor
郑若滨
弗兰克·埃芬博格
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN2008100950263A priority Critical patent/CN101567842B/en
Priority to PCT/CN2009/071247 priority patent/WO2009129721A1/en
Publication of CN101567842A publication Critical patent/CN101567842A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0064—Arbitration, scheduling or medium access control aspects

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Information Transfer Between Computers (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention discloses a method, a device and a system for transmitting and receiving service data. A transmitting terminal encapsulates service data to be transmitted into GEM frames in a passive optical network encapsulating mode and transmit the encapsulated GEM frames to optical fibers for transmission, wherein the GEM frames comprise service type identifiers which indicate the types of service data; accordingly, a receiving terminal receives the GEM frames and decapsulates the GEM frames to obtain the service data and the service type identifiers of the service data; and the receiving terminal identifies the service types of the service data according to the service type identifiers and carries out service processing corresponding to the service types. The method for encapsulating the service data comprises the steps: allocating the service data to be transmitted into a payload field; adding an internal field carrying port identifiers on the basis of the payload field; and addingexternal GEM frame headers carrying port identifiers on the basis of the internal field, thus the port identifiers carried by the external GEM frame headers and the port identifiers carried by the in ternal field together identify the port information of the service data.

Description

A kind of sending, receiving method of business datum, device and system
Technical field
The present invention relates to the EPON field, particularly a kind of business datum sending, receiving method, device and system.
Background technology
Along with the sustained and rapid development of internet and popularizing of PC, various value-added multimedias and IP operation increase sharply, and already present access technology can't satisfy huge bandwidth demand, becomes " bottleneck " of whole network development.The enormous bandwidth resource that the backbone network fiberize brings is ordered about people's consideration Access Network is realized fiberize, broadband, and then has formed GPON (Gigabit Passive Optical Network, gigabit passive optical network) gradually.
GPON protocol hierarchy model structure comprises GPM (GPON Physical Media DependentLayer; Gigabit passive optical network physical medium relevant layers) and GTC (GPON TransmissionConvergence Layer, gigabit passive optical network transmission convergence layer).
The GTC layer of GPON can provide the encapsulation mode of two kinds of business datums, i.e. ATM encapsulation mode and GEM encapsulation mode.Wherein, the ATM encapsulation mode is business datum to be encapsulated in the ATM cell of 53 bytes transmit, and the ATM encapsulation mode is the fixed length encapsulation mode; The GEM encapsulation mode is that business datum is encapsulated in the GEM frame.
See also Fig. 1, the sketch map that it sends business datum for GPON system in the prior art.The port of A system can only be supported the encapsulation to the TDM message; The B system port can only be supported the encapsulation to the SDH message; For A, B system, the GEM encapsulation mode of their each ports all is pre-configured, when system is fixed; Packaged business datum is also fixing thereupon, and this encapsulation mode is a kind of encapsulation mode of static state.Corresponding, receiving terminal also is a static configuration to the decapsulation pattern of GEM frame.
This shows that the transmission method of existing this business datum can only be supported the transmission of the business datum of fixed type, can not satisfy the user, make the user should use underaction multiple services demand.In addition; The GEM port address space of GPON support at present is 4K; Increase day by day along with number of users and communication service kind; Especially when adopting IP to be carried on GEM technological, the requirement that becomes more meticulous and classify and control to user and communication service far can not be satisfied in the GEM port address space of 4K, and GEM port address space how to expand GPON becomes a technical barrier.
Summary of the invention
The embodiment of the invention provides a kind of sending, receiving method, device and system of business datum, can dynamically support transmission, reception or the transmission of multiple business data.
The embodiment of the invention also provides a kind of method for packing and device of business datum, and port number that can expanding unit can better be supported the transmission of multiple business data.
The embodiment of the invention discloses a kind of sending method of business datum, comprising: business datum to be sent is packaged into EPON encapsulation mode GEM frame, comprises the type of service sign of indicating said traffic data type in the said GEM frame; GEM frame after the said encapsulation sent on the optical fiber transmit.
The embodiment of the invention discloses a kind of method of reseptance of business datum, comprising: receive the GEM frame; Decapsulation obtains the type of service sign of business datum and said business datum to said GEM frame; Identify the type of service of said business datum according to said type of service, said business datum is carried out and said type of service corresponding service is handled.
The embodiment of the invention discloses a kind of transmission method of business datum, comprising: transmitting terminal is packaged into the GEM frame with business datum to be sent, comprises the type of service sign of indicating said traffic data type in the said GEM frame; GEM frame after the said encapsulation sent on the optical fiber transmit; Receiving terminal receives said GEM frame; Decapsulation obtains said business datum and said type of service sign to said GEM frame; Identify the type of service of said business datum according to said type of service, said business datum is carried out and said type of service corresponding service is handled.
The embodiment of the invention discloses a kind of dispensing device of business datum, comprising: encapsulation unit, be used for business datum to be sent is packaged into the GEM frame, wherein, comprise the type of service sign of indicating said traffic data type in the said GEM frame; Transmitting element is used for the GEM frame after the encapsulation of said encapsulation unit sent on the optical fiber and transmits.
The embodiment of the invention discloses a kind of receiving system of business datum, comprising: receiving element is used to receive the GEM frame; Decapsulation unit is used for GEM frame decapsulation that said receiving element is received, obtains the type of service sign of business datum and said business datum; First Service Processing Unit is used for identifying according to said type of service the type of service of said business datum, and said business datum is carried out and said type of service corresponding service is handled.
The embodiment of the invention discloses a kind of transmission system of business datum, comprise dispensing device and receiving system.
The embodiment of the invention also discloses a kind of method for packing of business datum, comprising: business datum to be sent is put into payload field; On said payload field basis, add the internal layer territory of carrying port-mark; On basis, said internal layer territory, add the outer GEM frame head that carries port-mark, the port information of the said business datum of the common sign of the port-mark that carry in port-mark that said outer GEM frame head carries and said internal layer territory.
The embodiment of the invention also discloses a kind of packaging system of business datum, comprising: the payload field load bearing unit is used for said business datum to be sent is put into payload field; Internal layer territory adding device is used on said payload field basis, adding the internal layer territory of carrying port-mark; Outer GEM frame head adding device is used on basis, said internal layer territory, adding the outer GEM frame head that carries port-mark, the port information of the said business datum of the common sign of the port-mark that carry in port-mark that said outer GEM frame head carries and said internal layer territory.
From an embodiment of the invention described above, can find out; Transmitting terminal carries out the GEM encapsulation to business datum when; For business datum is added the type of service sign, thereby distinguish dissimilar business datums, and then can dynamically support the transmission of multiple business data; Accordingly; Receiving terminal is when decapsulation GEM frame; The type of service that the traffic data type that takes on according to deblocking identifies can be carried out handling with this type of service corresponding service, and then can be supported the reception to the multiple business data business datum; Satisfy the user to multiple services demand, helped improving the practical application of GPON.
Can find out from the another one embodiment of the invention described above; Owing in the GEM frame, added the internal layer territory of carrying port-mark; And then the port information through the common identification service data of port-mark in the outer GEM frame head of the port-mark in the said internal layer territory and this GEM frame; Therefore only compare in the prior art relatively through outer GEM frame head sign business datum port information; Obviously expanded and installed available port number, can better support the transmission of multiple business data, solved the GEM port address space problem of shortage that GPON supports in the prior art.
Description of drawings
The sketch map that Fig. 1 sends business datum for GPON system in the prior art;
Fig. 2 is the structure chart of GEM frame first embodiment of the present invention;
Fig. 3 is the flow chart of first embodiment of a kind of business datum sending method of the present invention;
Fig. 4 is the structure chart of first embodiment of a kind of business datum dispensing device of the present invention;
Fig. 5 is the flow chart of first embodiment of a kind of business datum method of reseptance of the present invention;
Fig. 6 is the structure chart of first embodiment of a kind of business datum receiving system of the present invention;
Fig. 7 is the structure chart of GEM frame second embodiment of the present invention;
Fig. 8 is the structure chart of GEM frame the 3rd embodiment of the present invention;
Fig. 9 is the flow chart of the 3rd embodiment of a kind of business datum sending method of the present invention;
Figure 10 is the structure chart of the 3rd embodiment of a kind of business datum dispensing device of the present invention;
Figure 11 is the flow chart of the 3rd embodiment of a kind of business datum method of reseptance of the present invention;
Figure 12 is the structure chart of the 3rd embodiment of a kind of business datum receiving system of the present invention;
Figure 13 is the structure chart of GEM frame the 4th embodiment of the present invention;
Figure 14 is the structure chart of first embodiment of a kind of business datum packaging system of the present invention;
Figure 15 is the structure chart of GEM frame the 5th embodiment of the present invention;
Figure 16 is the structure chart of second embodiment of a kind of business datum packaging system of the present invention;
Figure 17 is the structure chart of GEM frame the 6th embodiment of the present invention;
Figure 18 is the structure chart of the 3rd embodiment of a kind of business datum packaging system of the present invention.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
See also Fig. 2, it is the structure chart of GEM frame first embodiment of the present invention, comprises outer GEM frame head, extension field and payload field, and the type of service of carrying the indicating services data type in the extension field identifies.
To above-mentioned frame structure, in transmission first embodiment of the present invention, a kind of sending method of business datum is provided, see also Fig. 3, may further comprise the steps:
Step 301: business datum to be sent is put into payload field, on the payload field basis, add extension field, in extension field, carry the type of service sign of indicating services data type, on the payload field basis, add outer GEM frame head, accomplish the GEM encapsulation;
For example, after receiving business datum, its segmentation is formed the GEM data block, put into the GEM data block payload field of GEM frame structure then from GEM Client.Then, in the outer extension field of adding of the payload field that carries business datum, in this extension field, carry the type of service sign of indicating services data type.After this, also to add the GEM frame head for the payload field that carries business datum, generally speaking, can be at the outer GEM frame head that adds of extension field.Through after the above-mentioned processing, just accomplished GEM encapsulation to business datum.
Wherein, Outer GEM frame head comprises PLI (PDU Length Indicator; The payload length indication), Port ID (Port Identification; Port-mark), four parts of PTI (PDU Type Indicator, payload type indication) and HEC (Header Error Control, the wrong control of head).
Step 302: the GEM frame after will encapsulating sends on the optical fiber and transmits.
Corresponding with the above-mentioned method that provides; A kind of first embodiment of business datum dispensing device also is provided; Referring to Fig. 4; Dispensing device in the present embodiment comprises encapsulation unit 401 and transmitting element 402, further introduces its internal structure and annexation below in conjunction with the operation principle of this device.
Encapsulation unit 401 is used for business datum to be sent is packaged into the GEM frame, and wherein, this GEM frame comprises outer GEM frame head, extension field and payload field, and the type of service of carrying the indicating services data type in the extension field identifies;
Transmitting element 402 will send to optical fiber from the GEM frame after the encapsulation unit encapsulation and transmit;
Wherein, encapsulation unit comprises:
Payload field load bearing unit 403 is used for business datum to be sent is put into payload field;
Extension field adding device 404 is used on the basis of payload field, adding extension field, in extension field, carries the type of service sign of indicating services data type;
Frame head adding device 405 is used on the basis of payload field, adding outer GEM frame head.
In reception first embodiment of the present invention, realize the method that a kind of business datum receives, see also Fig. 5, may further comprise the steps:
Step 501: receive the GEM frame, this GEM frame comprises outer GEM frame head, extension field and payload field, and the type of service of carrying the indicating services data type in the extension field identifies;
Step 502: read outer GEM frame head, judge whether the PTI territory in this GEM frame head indicates the GEM frame to carry extension field, if, get into step 503, if not, get into 504;
Step 503: read the extension field of GEM frame, obtain the type of service sign of business datum, get into step 505;
Step 504: business datum is carried out and the traffic data type corresponding service processing of static configuration in advance, process ends;
Step 505: identify the type of service of business datum according to type of service, read the payload field of GEM frame, obtain business datum, business datum is carried out and the type of service corresponding service is handled process ends.
Corresponding with the above-mentioned method that provides; A kind of first embodiment of business datum receiving system also is provided; Referring to Fig. 6; Receiving system in the present embodiment comprises receiving element 601, decapsulation unit 602, first Service Processing Unit 603 and second Service Processing Unit 604, further introduces its internal structure and annexation below in conjunction with the operation principle of this device.
Receiving element 601 is used to receive the GEM frame, and this GEM frame comprises outer GEM frame head, extension field and payload field, and the type of service of carrying the indicating services data type in the extension field identifies;
Decapsulation unit 602 is used for the GEM frame decapsulation with the receiving element reception, obtains the type of business datum and business datum;
First Service Processing Unit 603 is used for identifying according to type of service the type of service of business datum, and business datum is carried out handling with the type of service corresponding service;
Second Service Processing Unit 604 is used for business datum is carried out and the traffic data type corresponding service processing of static configuration in advance.
Wherein, decapsulation unit comprises:
Frame head reading unit 605 is used to read outer GEM frame head;
Identifying unit 606, whether the PTI territory of the outer GEM frame head that is used to judge that the frame head reading unit reads indicates the GEM frame to carry extension field; If then notify the extension field reading unit; If, then do not notify second Service Processing Unit;
Wherein, when the GEM frame of receiving system reception all carries extension field, do not get rid of the PTI territory of not using identifying unit to judge the outer GEM frame head that the frame head reading unit reads and whether indicate the GEM frame to carry extension field.
Extension field reading unit 607 is used to read the extension field of GEM frame, obtains the type of service sign of business datum;
Payload field reading unit 608 is used to read the payload field of GEM frame, obtains business datum.
In transmission first embodiment of the present invention, realize a kind of transmission method of business datum, comprise aforesaid sending method and method of reseptance, because of it having been carried out detailed introduction in the front, so do not give unnecessary details.
Corresponding with the above-mentioned method that provides, the present invention also provides first embodiment of a kind of business data transmission system, comprises aforesaid dispensing device and receiving system, because of it having been carried out detailed introduction in the front, here so do not give unnecessary details.
See also Fig. 7; Be the GEM frame second example structure figure of the present invention; Comprise outer GEM frame head, extension field and payload field; Carry the type of service sign and the Ex-portID (Expanded Port Identification, ECP Extended Capabilities Port sign) of indicating services data type in the extension field, Ex-port ID is used to expand the port of GPON system.
To above-mentioned frame structure, the invention provides second embodiment of sending method, device.The present embodiment and the first embodiment difference are, except carrying the type of service sign, also carry Ex-port ID in the extension field of GEM frame.
Equally, to above-mentioned frame structure, the invention provides second embodiment of method of reseptance, device.The present embodiment and the first embodiment difference are, except carrying the type of service sign, also carry Ex-port ID in the extension field of GEM frame.
In transmission second embodiment of the present invention, realize a kind of transmission method of business datum, comprise aforesaid sending method and method of reseptance, because of it having been carried out detailed introduction in the front, so do not give unnecessary details.
Corresponding with the above-mentioned method that provides, the present invention also provides second embodiment of a kind of business data transmission system, comprises aforesaid dispensing device and receiving system, because of it having been carried out detailed introduction in the front, here so do not give unnecessary details.
See also Fig. 8; Be GEM frame the 3rd example structure figure of the present invention; Comprise outer GEM frame head; Internal layer GEM frame head, extension field and payload field are carried the type of service sign and the Ex-port ID of indicating services data type in the extension field, outer GEM frame head and internal layer GEM frame head all carry the Port ID that is used to expand the GPON system port.
To above-mentioned frame structure, in transmission the 3rd embodiment of the present invention, a kind of sending method of business datum is provided, see also Fig. 9, may further comprise the steps:
Step 901: business datum to be sent is put into payload field; On the payload field basis, add extension field; In this extension field, carry the type of service sign and the Ex-port ID of indicating services data type; Ex-port ID is used to expand the port of GPON system, on the payload field basis, adds outer GEM frame head and internal layer GEM frame head, accomplishes the GEM encapsulation;
Wherein, outer GEM frame head and internal layer GEM frame head structure are identical with frame head structure in sending first embodiment.
Step 902: the GEM frame after will encapsulating sends on the optical fiber and transmits.
Corresponding with the above-mentioned method that provides; A kind of business datum dispensing device the 3rd embodiment also is provided; Referring to Figure 10; Dispensing device in the present embodiment comprises encapsulation unit 1001 and transmitting element 1002, further introduces its internal structure and annexation below in conjunction with the operation principle of this device.
Encapsulation unit 1001; Be used for business datum to be sent is packaged into the GEM frame; Wherein, this GEM frame comprises outer GEM frame head, internal layer GEM frame head, extension field and payload field, carries the type of service sign and the Ex-port ID of indicating services data type in the extension field;
Transmitting element 1002 will send to optical fiber from the GEM frame after the encapsulation unit encapsulation and transmit;
Wherein, encapsulation unit comprises:
Payload field load bearing unit 1003 is used for business datum to be sent is put into payload field;
Extension field adding device 1004 is used on the basis of payload field, adding extension field, in extension field, carries the type of service sign of indicating services data type and the Ex-port ID of ECP Extended Capabilities Port;
Frame head adding device 1005 is used on the basis of payload field, adding the GEM frame head.
Wherein, the frame head adding device comprises:
Outer GEM frame head adding device 1006 is used on the basis of said payload field, adding outer GEM frame head.
Internal layer GEM frame head adding device 1007 is used on the basis of said payload field, adding internal layer GEM frame head.
In reception the 3rd embodiment of the present invention, realize a kind of method of reseptance of business datum, see also Figure 11, may further comprise the steps:
Step 1101: receive the GEM frame, this GEM frame comprises outer GEM frame head, and internal layer GEM frame head, extension field and payload field are carried the type of service sign and the Ex-port ID of indicating services data type in the extension field;
Step 1102: read outer GEM frame head, judge whether the PTI territory in the outer GEM frame head indicates the GEM frame to carry internal layer GEM frame head, if, get into step 1103, if not, get into step 1105;
Step 1103: read internal layer GEM frame head, judge whether the PTI territory in the internal layer GEM frame head indicates the GEM frame to carry extension field, if, get into step 1104, if not, get into step 1105;
Step 1104: read the extension field of GEM frame, obtain the type of service sign of business datum, get into step 1106;
Step 1105: business datum is carried out and the traffic data type corresponding service processing of static configuration in advance, process ends.
Step 1106: identify the type of service of business datum according to type of service, read the payload field of GEM frame, obtain business datum, business datum is carried out and the type of service corresponding service is handled process ends.
Corresponding with the above-mentioned method that provides; A kind of the 3rd embodiment of business datum receiving system also is provided; See also Figure 12; Receiving system in the present embodiment comprises receiving element 1201, decapsulation unit 1202, first Service Processing Unit 1203 and second Service Processing Unit 1204, further introduces its internal structure and annexation below in conjunction with the operation principle of this device.
Receiving element 1201 is used to receive the GEM frame, and this GEM frame comprises outer GEM frame head, and internal layer GEM frame head, extension field and payload field are carried the type of service sign and the Ex-port ID of indicating services data type in the extension field;
Decapsulation unit 1202 is used for GEM frame decapsulation that receiving element is received, obtains the type of service sign of business datum and business datum;
First Service Processing Unit 1203 is used for identifying according to type of service the type of service of business datum, and business datum is carried out handling with the type of service corresponding service.
Second Service Processing Unit 1204 is used for business datum is carried out and the traffic data type corresponding service processing of static configuration in advance.
Wherein, decapsulation unit comprises:
Outer GEM frame head reading unit 1205 is used to read outer GEM frame head;
Internal layer GEM frame head reading unit 1206 is used to read internal layer GEM frame head;
Extension field reading unit 1207 is used to read the extension field of GEM frame, obtains the type of service sign of business datum;
Payload field reading unit 1208 is used to read the payload field of GEM frame, obtains business datum.
Outer GEM frame head identifying unit 1209, whether the PTI territory of the outer GEM frame head that is used to judge that outer GEM frame head reading unit reads indicates the GEM frame to carry internal layer GEM frame head; If then notify internal layer GEM frame head identifying unit; If, then do not notify second Service Processing Unit;
Wherein, when the GEM frame of receiving system reception all carries internal layer GEM frame head, do not get rid of the PTI territory of not using outer GEM frame head identifying unit to judge the outer GEM frame head that outer GEM frame head reading unit reads and whether indicate the GEM frame to carry internal layer GEM frame head.
Internal layer GEM frame head identifying unit 1210, whether the PTI territory of the said internal layer GEM frame head that is used to judge that internal layer GEM frame head reading unit reads indicates the GEM frame to carry internal layer GEM frame head; If then notify the extension field reading unit; If, then do not notify second Service Processing Unit;
Wherein, when the GEM frame of receiving system reception all carries extension field, do not get rid of the PTI territory of not using internal layer GEM frame head identifying unit to judge the internal layer GEM frame head that internal layer GEM frame head reading unit reads and whether indicate the GEM frame to carry extension field.
In transmission the 3rd embodiment of the present invention, realize a kind of method of business data transmission, comprise aforesaid sending method and method of reseptance, because of it having been carried out detailed introduction in the front, so do not give unnecessary details.
Corresponding with the above-mentioned method that provides, the 3rd embodiment of a kind of business data transmission system also is provided, comprise aforesaid dispensing device and receiving system, because of it having been carried out detailed introduction in the front, here so do not give unnecessary details.
In the above-described embodiments, if the port number of GPON system satisfies actual needs, the extension field in the present embodiment can not comprise Ex-port ID.
See also Figure 13, be the structure chart of GEM frame the 4th embodiment of the present invention, this GEM frame comprises outer GEM frame head, internal layer GEM frame head and payload field, and internal layer GEM frame head and outer GEM frame head all carry Port ID, identify the port information of said business datum jointly.
To above-mentioned frame structure, in encapsulation first embodiment of the present invention, a kind of method for packing of business datum is provided, may further comprise the steps:
Step 1 is put into payload field with business datum to be sent;
Step 2 is added internal layer GEM frame head on the payload field basis, this internal layer GEM frame head carries PortID;
Step 3 is added outer GEM frame head on internal layer GEM frame head basis, this skin GEM frame head carries Port ID, and the PTI territory indication GEM frame in the outer GEM frame head carries internal layer GEM frame head.
Corresponding with the above-mentioned method that provides; A kind of first embodiment of business datum packaging system also is provided; See also Figure 14; Packaging system in the present embodiment comprises payload field load bearing unit 1401, internal layer GEM frame head adding device 1402 and outer GEM frame head adding device 1403, further introduces its internal structure and annexation below in conjunction with the operation principle of this device.
Payload field load bearing unit 1401 is used for said business datum to be sent is put into payload field;
Internal layer GEM frame head adding device 1402 is used on the payload field basis, adding internal layer GEM frame head;
Outer GEM frame head adding device 1403 is used on internal layer GEM frame head basis, adding outer GEM frame head, and the PTI territory indication GEM frame in the outer GEM frame head carries internal layer GEM frame head.
See also Figure 15; Be the structure chart of GEM frame the 5th embodiment of the present invention, this GEM frame comprises outer GEM frame head, internal layer extension field and payload field; Wherein, the port information of entrained Ex-port ID of internal layer extension field and the outer GEM frame head common identification service data of Port ID of carrying.
To above-mentioned frame structure, in encapsulation second embodiment of the present invention, a kind of method for packing of business datum is provided, may further comprise the steps:
Step 1 is put into payload field with business datum to be sent;
Step 2 is added the internal layer extension field on the payload field basis, this internal layer extension field is carried Ex-port ID;
Step 3 is added outer GEM frame head on internal layer extension field basis, this skin GEM frame head carries Port ID, and the PTI territory indication GEM frame in the outer GEM frame head carries the internal layer extension field.
Corresponding with the above-mentioned method that provides; A kind of second embodiment of business datum packaging system also is provided; See also Figure 16; Packaging system in the present embodiment comprises payload field load bearing unit 1601, internal layer extension field adding device 1602 and outer GEM frame head adding device 1603, further introduces its internal structure and annexation below in conjunction with the operation principle of this device.
Payload field load bearing unit 1601 is used for business datum to be sent is put into payload field;
Internal layer extension field adding device 1602 is used on the payload field basis, adding the internal layer extension field;
Outer GEM frame head adding device 1603 is used on internal layer extension field basis, adding outer GEM frame head, and the PTI territory indication GEM frame in the outer GEM frame head carries the internal layer extension field.
See also Figure 17; Be GEM frame the 6th example structure figure of the present invention; This GEM frame comprises outer GEM frame head; Internal layer GEM frame head, internal layer extension field and payload field, the Port ID that Ex-portID that the internal layer extension field is carried and internal layer GEM frame head and outer GEM frame head carry, the port information of common identification service data.
To above-mentioned frame structure, in encapsulation the 3rd embodiment of the present invention, a kind of method for packing of business datum is provided, may further comprise the steps:
Step 1 is put into payload field with business datum to be sent;
Step 2 is added the internal layer extension field on the payload field basis, this internal layer extension field is carried Ex-port ID;
Step 3 is added internal layer GEM frame head on internal layer extension field basis, this internal layer GEM frame head carries Port ID, and the PTI territory indication GEM frame in the internal layer GEM frame head carries the internal layer extension field;
Step 4 is added outer GEM frame head on internal layer GEM frame head basis, this skin GEM frame head carries Port ID, and the PTI territory indication GEM frame in the outer GEM frame head carries internal layer GEM frame head.
Corresponding with the above-mentioned method that provides; A kind of the 3rd embodiment of business datum packaging system also is provided; See also Figure 18; Packaging system in the present embodiment comprises payload field load bearing unit 1801, internal layer extension field adding device 1802, internal layer GEM frame head adding device 1803 and outer GEM frame head adding device 1804, further introduces its internal structure and annexation below in conjunction with the operation principle of this device.
Payload field load bearing unit 1801 is used for business datum to be sent is put into payload field;
Internal layer extension field adding device 1802 is used on the payload field basis, adding the internal layer extension field;
Internal layer GEM frame head adding device 1803 is used on internal layer extension field basis, adding internal layer GEM frame head.
Outer GEM frame head adding device 1804 is used on internal layer GEM frame head basis, adding outer GEM frame head.
In each embodiment of the present invention, utilize PTI territory indication GEM frame to carry extension field or/and internal layer GEM frame head can adopt the mode of coding to realize, concrete execution mode is like table 1, shown in 2.
Table 1 coding execution mode
The PTI bit Function
PTI the 1st bit Internal layer GEM frame head is carried in indication
PTI the 2nd bit GEM frame extension field is carried in indication
PTI the 3rd bit Same prior art, last segmentation when whether indication GEM frame is segment processing
The another kind of coding of table 2 execution mode
The PTI coding Function
000-101 Same prior art, last segmentation when whether indication GEM frame is segment processing or do not have congested
110 GEM frame extension field is carried in indication
111 Internal layer GEM frame head is carried in indication
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.

Claims (11)

1. the sending method of a business datum is characterized in that, comprising:
Business datum to be sent is packaged into EPON encapsulation mode GEM frame, and said GEM frame comprises GEM frame head, extension field and payload field, carries the ECP Extended Capabilities Port sign in the said extension field and indicates the type of service of said traffic data type to identify; Said ECP Extended Capabilities Port sign is used to expand the port of GPON system; Said GEM frame head comprises outer GEM frame head and internal layer GEM frame head, the port information of the said business datum of the common sign of the port-mark that said ECP Extended Capabilities Port sign and said outer GEM frame head and internal layer GEM frame head all carry; Said outer GEM frame head comprises that the said GEM frame of indication carries the payload type indication PTI territory of internal layer GEM frame head, and said internal layer GEM frame head comprises that the said GEM frame of indication carries the payload type indication PTI territory of said extension field;
GEM frame after the said encapsulation sent on the optical fiber transmit.
2. method according to claim 1 is characterized in that, saidly business datum to be sent is packaged into the GEM frame comprises:
Said business datum to be sent is put into payload field;
On said payload field basis, add extension field, in said extension field, carry the type of service sign of indicating services data type;
On said extension field basis, add internal layer GEM frame head, on internal layer GEM frame head basis, add outer GEM frame head.
3. the method for reseptance of a business datum is characterized in that, comprising:
Receive EPON encapsulation mode GEM frame, said GEM frame comprises GEM frame head, extension field and payload field, carries the ECP Extended Capabilities Port sign in the said extension field and indicates the type of service of said traffic data type to identify; Said ECP Extended Capabilities Port sign is used to expand the port of GPON system; Said GEM frame head comprises outer GEM frame head and internal layer GEM frame head, the port information of the said business datum of the common sign of the port-mark that said ECP Extended Capabilities Port sign and said outer GEM frame head and internal layer GEM frame head all carry; Said outer GEM frame head comprises that the said GEM frame of indication carries the payload type indication PTI territory of internal layer GEM frame head, and said internal layer GEM frame head comprises that the said GEM frame of indication carries the payload type indication PTI territory of said extension field; Decapsulation obtains the type of service sign of business datum and said business datum to said GEM frame;
Identify the type of service of said business datum according to said type of service, said business datum is carried out and said type of service corresponding service is handled.
4. method according to claim 3 is characterized in that, the type of service sign that decapsulation obtains business datum and said business datum to said GEM frame comprises:
Read said outer GEM frame head;
Read said internal layer GEM frame head;
Read the extension field of said GEM frame, obtain the type of service sign of said business datum;
Read the payload field of said GEM frame, obtain said business datum.
5. method according to claim 4 is characterized in that, also comprises:
Judge whether the PTI territory of said outer GEM frame head indicates the GEM frame to carry internal layer GEM frame head; If; Then carry out the step that reads said internal layer GEM frame head,, then said business datum is carried out and the traffic data type corresponding service processing of static configuration in advance if not;
Judge whether the PTI territory in the said internal layer GEM frame head indicates said GEM frame to carry extension field; If; Then carry out the extension field step of the said GEM of reading frame,, then said business datum is carried out and the traffic data type corresponding service processing of static configuration in advance if not.
6. the dispensing device of a business datum is characterized in that, comprising:
Encapsulation unit; Be used for business datum to be sent is packaged into EPON encapsulation mode GEM frame; Wherein, said GEM frame comprises GEM frame head, extension field and payload field, carries the ECP Extended Capabilities Port sign in the said extension field and indicates the type of service of said traffic data type to identify; Said ECP Extended Capabilities Port sign is used to expand the port of GPON system; Said GEM frame head comprises outer GEM frame head and internal layer GEM frame head, the port information of the said business datum of the common sign of the port-mark that said ECP Extended Capabilities Port sign and said outer GEM frame head and internal layer GEM frame head all carry; Said outer GEM frame head comprises that the said GEM frame of indication carries the payload type indication PTI territory of internal layer GEM frame head, and said internal layer GEM frame head comprises that the said GEM frame of indication carries the payload type indication PTI territory of said extension field;
Transmitting element is used for the GEM frame after the encapsulation of said encapsulation unit sent on the optical fiber and transmits.
7. device according to claim 6 is characterized in that, said encapsulation unit comprises:
The payload field load bearing unit is used for said business datum to be sent is put into payload field;
The extension field adding device is used on the basis of said payload field, adding extension field, in said extension field, carries the type of service sign of indicating services data type;
Internal layer GEM frame head adding device is used on the basis of said payload field, adding internal layer GEM frame head;
Outer GEM frame head adding device is used on internal layer GEM frame head basis, adding outer GEM frame head.
8. the receiving system of a business datum is characterized in that, comprising:
Receiving element is used to receive EPON encapsulation mode GEM frame, and said GEM frame comprises GEM frame head, extension field and payload field, carries the ECP Extended Capabilities Port sign in the said extension field and indicates the type of service of said traffic data type to identify; Said ECP Extended Capabilities Port sign is used to expand the port of GPON system; Said GEM frame head comprises outer GEM frame head and internal layer GEM frame head, the port information of the said business datum of the common sign of the port-mark that said ECP Extended Capabilities Port sign and said outer GEM frame head and internal layer GEM frame head all carry; Said outer GEM frame head comprises that the said GEM frame of indication carries the payload type indication PTI territory of internal layer GEM frame head, and said internal layer GEM frame head comprises that the said GEM frame of indication carries the payload type indication PTI territory of said extension field;
Decapsulation unit is used for GEM frame decapsulation that said receiving element is received, obtains the type of service sign of business datum and said business datum;
First Service Processing Unit is used for identifying according to said type of service the type of service of said business datum, and said business datum is carried out and said type of service corresponding service is handled.
9. device according to claim 8 is characterized in that, said decapsulation unit comprises:
Outer frame head reading unit is used to read said outer GEM frame head;
Internal layer frame head reading unit is used to read said internal layer GEM frame head;
The extension field reading unit is used to read the extension field of said GEM frame, obtains the type of service sign of said business datum;
The payload field reading unit is used to read the payload field of said GEM frame, obtains said business datum.
10. device according to claim 9 is characterized in that, also comprises:
Outer frame head identifying unit, whether the PTI territory of the outer GEM frame head that is used to judge that said outer frame head reading unit reads indicates the GEM frame to carry internal layer GEM frame head; If then notify internal layer GEM frame head identifying unit, if not, then notify second Service Processing Unit;
Internal layer frame head identifying unit, whether the PTI territory of the said internal layer GEM frame head that is used to judge that said internal layer frame head reading unit reads indicates said GEM frame to carry extension field; If then notify said extension field reading unit; If, then do not notify second Service Processing Unit;
Said second Service Processing Unit is used for said business datum is carried out and the traffic data type corresponding service processing of static configuration in advance.
11. the transmission system of a business datum is characterized in that, comprises in the claim 6 to 7 any described receiving system in any described dispensing device and claim 8 to 10.
CN2008100950263A 2008-04-23 2008-04-23 Method, device and system for transmitting and receiving service data Expired - Fee Related CN101567842B (en)

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