CN102318239B - Method and device for transmitting upstream transmission frame in passive optical network - Google Patents
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Abstract
A method for transmitting an upstream transmission frame in a passive optical network which refers to the passive optical network technology is provided to improve the flexibility of the system and satisfy the request of low error probability as well as possible. The method includes: after success of connection, transmitting a preamble according to the allocated time slot, transmitting a burst synchronization delimiter, and then transmitting a burst header, a GPON Transmission Convergence GTC frame header, a GTC frame data successively. In the transmitted synchronization delimiter the number of the nonzero values and zero values are the same, and in the delimiter sequence the number of nonzero values on odd bit is equal to the number of zero values on even bit, and the number of nonzero values on even bit is equal to the number of zero values on odd bit, the number of zero values on odd bit is N, the number of nonzero values on odd bit is M, the relation |N-M|<=1 is satisfied, the number of continuous zero values is X, the number of continuous nonzero values is Y, the relation |X-Y|<=1 is satisfied. A device for transmitting an upstream transmission frame in a passive optical network is provided therewith.
Description
Technical field
The present invention relates to passive optical network technique, particularly relate to and in EPON, send up transmission frame method and equipment.
Background technology
EPON (Passive Optical Network, PON) due to advantages such as its easy care, high bandwidth, low costs, becoming the outstanding person of light access technology, is by single platform, comprehensively to access the desirable physical platform of the multiple business such as voice, data, video.PON technology is the optical fiber access technology of point-to-multipoint (Point to Multipoint, P2MP).PON is by optical line terminal (Optical Line Terminal, OLT), optical network unit (Opitcal Network Unit, ONU) and Optical Distribution Network (Optical Distribution Network, ODN) form, its advantage derives from the divide/mixer of passive light (Splitter/Coupler) in ODN, thereby PON does not need to use the components and parts with amplification and relay function.Due to the topological structure of PON employing point-to-multipoint, so must adopt point-to-multipoint multiple access protocol to make numerous ONU can share OLT and trunk optical fiber.In PON system, arrange, the direction of data from OLT to ONU is down direction, and the direction from ONU to OLT is up direction.From the content of carrying, classify at present, PON can be divided into multiple, and wherein gigabit Optical Access Network (Gigabit-Capable Passive Optical Network, GPON) outbalance is a kind of.GPON system adopts wavelength division multiplexing (Wavelength Division Multiplexing, WDM) technology, realizes single fiber bi-directional transmission.For the signal of a plurality of users' the direction of making a return journey on same optical fiber of separation, downstream data flow adopts broadcast technology; Upstream adopts time-division multiplexing multiple access access (Time Division Multiple Access, TDMA) technology.
GPON is at the burst mode that is transmitted as of up direction.The specific time slot that each ONU distributes according to OLT sends data to OLT.When OLT receives the data of each ONU, need to first carry out synchronously, after the original position of acquisition ONU transmission Frame, could start to receive data.In ITU-TG.984.3 standard, provided the synchronization mechanism that uplink burst receives.Lead code (Preamble) and delimiter (Delimiter) field are set in the front portion of GPON uplink burst frame.The reception that OLT utilizes these two fields to complete uplink burst frame is synchronous.
Preamble field is a string binary sequence, is convenient to OLT receiving terminal and carries out automatic gain control, clock recovery and synchronously receive.OLT, when receiving uplink burst frame, utilizes delimiter and the uplink burst frame receiving to mate, and after the match is successful, OLT can be known the original position of data in this burst frame, completes simultaneous operation.In existing scheme, defined the delimiter field of six kinds, user can select wherein a kind of being configured according to demand.
The current defined error probability of GPON system is 10-4, and P (lost_burst)≤10-10.The delimiter that G984.3 standard provides is only to meet the requirement of existing GPON system.But in follow-on GPON system, because its uplink and downlink transmission rate all will improve and require to support full-service, this has just had new requirement to the error rate of channel and receiving terminal.The length that prior art provides is the requirement that the delimiter field of 16 bits or 20 bits has been difficult to meet GPON system of future generation, therefore need to propose a kind of method of new burst synchronization delimiter field and the up transmission frame of transmission.
Summary of the invention
The embodiment of the present invention provides a kind of method that sends up transmission frame in EPON, to improve the flexibility ratio of system, reduces error probability.
Described method comprises:
After linking successfully, by the time slot distributing, send lead code;
Send burst synchronization delimiter, the synchronization delimitation symbol nonzero value sending is identical with null value number, and the nonzero value number of the odd bits of delimiter sequence equals the null value number of even bit, and the nonzero value number of even bit equals the null value number of odd bits, its odd bits null value number is N, and odd bits nonzero value number is M, meet relation | N-M|≤1, it connects zero number is X, and the continuous number of non-zero is Y, meets to close to be | X-Y|≤1;
Then send successively burst frame head, transmission convergence layer frame frame head and send transmission convergence layer frame data.
The embodiment of the present invention provides the equipment that sends up transmission frame in a kind of EPON simultaneously, comprising: lead code transmitting element, sends lead code for the time slot by distributing;
Synchronization delimitation symbol transmitting element, be used for sending burst synchronization delimiter, the synchronization delimitation symbol nonzero value sending is identical with null value number, and the nonzero value number of the odd bits of delimiter sequence equals the null value number of even bit, and the nonzero value number of even bit equals the null value number of odd bits; Its odd bits null value number is N, and odd bits nonzero value number is M, meets relation | N-M|≤1, and the difference of N and M is not more than 1; It is X that synchronization delimitation symbol connects zero number, and the continuous number of non-zero is Y, meets to close to be | X-Y|≤1;
A burst frame transmitting element is used for sending burst frame head;
Transmission convergence layer frame frame head transmitting element is used for sending transmission convergence layer frame frame head;
Transmission convergence layer frame data transmitting element is used for sending transmission convergence layer frame data.
The embodiment of the present invention provides the method that meets the up transmission frame that is applied to GPON system of future generation, has wherein adopted more excellent delimiter sequence, and the sequence that the embodiment of the present invention provides can effectively increase system flexibility ratio, reduction error probability.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is embodiment of the present invention GPON uplink burst frame structure schematic diagram;
Fig. 2 is that the embodiment of the present invention should send the method flow diagram that passive optical network uplink transmits frame;
Fig. 3 is the structured flowchart that sends up transmission frame equipment in embodiment of the present invention EPON.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The uplink of PON system transmits data by time-multiplexed access way.Up link is divided into different time slots, according to the upstream bandwidth profile information of downlink frame (upstream bandwidth map) field, come to distribute ascending time slot to each ONU, all like this ONU just can send the data of oneself according to certain order, can not produce and in order to fight for time slot, cause conflict.
The embodiment of the present invention describes in conjunction with GPON system, as shown in Figure 1, GPON uplink burst frame structure, the up burst frame of GPON is by PLOu (Physical Layer Overhead upstream, upstream physical layer expense), GTC (GPON Transmission Convergence, GPON transmits convergence layer) overhead (data frame head) and GTC payload (payload user data) field form.Guard Time is the guard time between burst frame, will be added to the frame head of burst frame.
PLOu is the physical control head of GPON burst frame, mainly for frame alignment, synchronous and sign send the ONU of this frame.PLOu is comprised of Preamble (lead code), Delimiter (burst synchronization delimiter) and Burst Header (burst frame head).GTC Overhead is the data frame head of GTC framing sublayer data packet, comprise PLOAMu (Physical Layer Operation Administration Maintenance upstream, upstream physical layer operation management maintain) and DBRu (Dynamic Bandwidth Report upstream, dynamic bandwidth report).The PLOAM message of the main reporting uplink data of PLOAMu is mainly the administrative messag such as maintenance, controlled state of ONU.DBRu is mainly for to transmit bandwidth application next time, completes the Dynamic Bandwidth Allocation of ONU.In application, may not that every frame has all comprised PLOAMu and DBRu, but need OLT and ONU to consult.GTC payload is the quiet lotuses of data, can be that DBA (Dynamic Bandwidth Assignment, Dynamic Bandwidth Allocation) status report can be also Frame.If Frame can be divided into GEM (GPON Encapsulation Method, GPON method for packing) header and Frame.
Shown in Fig. 2, be applied to the method flow diagram that EPON sends up transmission frame.
S101, sends lead code by the time slot distributing; In concrete enforcement, it is the sequence (hexadecimal is 0x AA...) of 1010 1010... that lead code is preferentially selected binary sequence.
S102, send burst synchronization delimiter, the synchronization delimitation symbol nonzero value sending is identical with null value number, and the nonzero value number of the odd bits of delimiter sequence equals the null value number of even bit, and the nonzero value number of even bit equals the null value number of odd bits; Its odd bits null value number is N, and odd bits nonzero value number is M, meets relation | N-M|≤1, and the difference of N and M is not more than 1 (or even bit null value number is N, and nonzero value number is M, meets relation | N-M|≤1); It is X that synchronization delimitation symbol connects zero number, and the continuous number of non-zero is Y, meets to close to be | X-Y|≤1
S103, sends burst frame head, for detection of the real-time status report of link error rates, sign ONU-ID and ONU.
S104, sends transmission convergence layer frame frame head;
S105, sends transmission convergence layer frame data.
In concrete enforcement, can increase system distinguish, in the situation that need to select transmission rate, determine up transmission rate, in PLOAMd, definition delimiter instruction A and the B:A corresponding with two kinds of speed is that 2.5Gbps and B are 10Gbps.Before being fixed on to step S102 really, speed completes.Before sending burst synchronization delimiter, determine uplink transmission rate.
The lead code of the physical control head of the ONU uplink burst frame of GPON system, delimiter and pre-time delay etc. are all that the parameter that the Upstream Overhead that sends according to OLT comprises is formulated.The effect of the delimiter of ONU uplink burst frame is the uplink burst frame accurate synchronization that OLT receiving terminal and ONU are sent.The burst frame of mistake synchronously can cause the time delay growth of system, more serious meeting to cause the paralysis of OLT receiving terminal, and therefore selected delimiter should reduce the probability of false sync as much as possible.Due to delimiter, be to be that delimiter does not have FEC protection without FEC coding.So require the autocorrelation of delimiter large and as much as possible little with the correlation of its shift sequence, the shift sequence smallest hamming distance between the sequence that delimiter and lead code and delimiter form is large as much as possible.
Because delimiter is not to be subject to FEC coding protection, and in transmission process due to the interference of noise, the error rate is higher.This just requires OLT receiving terminal not affecting under the condition of net synchronization capability, thereby set an acceptable error code values, improves the synchronous synchronous probability of burst frame or shortens the time delay because synchronously producing.This acceptable error code values is exactly bit error thresholds, such as being
l is the length of burst synchronization delimiter.
The embodiment of the present invention provides one group of delimiter sequence that is applicable to GPON system of future generation, wherein, if delimiter sequence is DC Balance (DC balance), be that nonzero value is identical with null value number, and the nonzero value number of the odd bits of delimiter sequence equals the null value number of even bit, and the nonzero value number of even bit equals the null value number of odd bits; Its odd bits null value number is N, and odd bits nonzero value number is M, meets relation | N-M|≤1, and the difference of N and M is not more than 1; It connects zero number is X, and the continuous number of non-zero is Y, meets to close to be | X-Y|≤1.
Be the delimiter sequence that 1010 1010... mated when (10 circulations form) with lead code as shown in Table 1, the minimum Hamming distance value between delimiter and its shift sequence is
(L is the length of burst synchronization delimiter), makes system in the situation that not increasing corresponding complexity, effectively reduces the false sync probability of lock of the uplink burst frame burst synchronization that OLT receiving terminal and ONU send.
The delimiter sequence that table one embodiment of the present invention provides
OLT chooses corresponding delimiter sequence according to the requirement of different system from table one.If GPON system selectable lengths of future generation is the sequence (binary system is 10100101011001100111100111100000) that 32 bits are defined as 0x A56679E0.
A kind of specific implementation be OLT transmitting terminal by this sequence definition in Upstream_Overhead, then OLT is embedded into the Upstream_Overhead that defines in descending PLOAMd instruction.ONU, according to the delimiter in the Upstream_Overhead in received PLOAMd, sets the synchronization delimitation symbol of its uplink burst frame.
The embodiment of the present invention has provided another method that delimiter generates.In PON system, for the ease of synchronous and clock recovery, all adopted line coding technology.In row transmission thereon, may adopt nBmB coding.The principle of nBmB coding is that the data of n bit form the code word of m bit after coding, and the code stream after coding meets the requirement such as few as far as possible of DC balance, continuous 0 and continuous 1 number.NBmB coding is generally divided into data and controls two parts.For data, the code word of the corresponding m bit of the data of n bit.For uplink burst frame, GTC can adopt nBmB coding, and in order to make delimiter have better characteristic, delimiter can the one or more code words in nBmB encodes form.
If PON system adopts 9B10B line coding mechanism, can be by the delimiter described in the 9B10B coding method generation embodiment of the present invention.Table two provides one group of delimiter meeting described in the embodiment of the present invention, and the code word that this group delimiter is encoded by 9B10B forms.
The delimiter sequence that table two embodiment of the present invention provides
The delimiter sequence of 30 bits that table two provides is comprised of the code word of the 9B10B coding of 3 10 bits, and these 3 10 bit character are little with the correlation of the code word being generated by 9B 10B coding, are easy to difference.The delimiter of 40 bits that in like manner, table two provides is comprised of 10 bit codewords of 4 10 bits.The delimiter sequence providing due to table two is to be generated by 9B10B coding, except the method for existing interpolation delimiter sequence, can add the 9B sequence corresponding with 10B at transmitting terminal, and then the 9B10B coding through ONU transmitting terminal generates delimiter.
The delimiter sequence table one that the embodiment of the present invention one provides and table two are all based on lead code 1010 1010... (being comprised of 10 circulations) sequence; If preamble sequence changes 0101 0101... (01 circulation forms) sequence into, the resulting sequence of binary sequence negate that adopts above-described embodiment to provide, meets burst synchronization delimiter characteristic of the present invention equally.For example 111110000101001010011001 negates are 000001111010110101100110.
If preamble sequence is that table three provides the burst synchronization delimiter sequence that meets the present embodiment due to a plurality of 10111011010100100001111000100110 orders example (its hexadecimal sequence is 0x BB52 1E26) end to end forming.
The delimiter sequence that table three embodiment of the present invention provides
If preamble sequence is that table four provides the burst synchronization delimiter sequence that meets the present embodiment due to end to end the forming of a plurality of 11101101010010000111100010011010 sequences (its hexadecimal sequence is 0x ED48789A).
The delimiter sequence that table four embodiment of the present invention provides
Further, can use different delimiter sequences to distinguish and whether open certain application function, such as FEC coding.
Before sending burst synchronization delimiter, detect application function selection instruction, and select predetermined burst synchronization delimiter according to application function selection instruction.
Two kinds of delimiter instruction C that for example OLT can define in PLOAMd that distinctive function opens and D:C are for having carried certain function, D for there is no this function or this function less than unlatching.Such as ONU detect C instruction add length be 32 bits by delimiter sequence provided by the invention: 0xAD4CC30F, (binary sequence is: 10101101010011001100001100001111), showing has FEC function between OLT and ONU; As detected, add length after D instruction and be 32 bits by delimiter sequence provided by the invention: 0x A56679E0 (binary sequence is 10100101011001100111100111100000), this sequence shows between OLT and ONU, there is no FEC function, or does not need to open FEC function.
By finding out, can set in advance default burst synchronization delimiter and function application instruction corresponding relation above.
Or OLT detects the accuracy of uplink burst frame in order to strengthen receiving terminal, can select sequence that two groups of length are 64 bits as two kinds of delimiter instruction C and D.When ONU detects C instruction, FEC function for example, add length and be 64 bits by delimiter sequence provided by the invention: (binary sequence is 0x E39D190A 07D896DB: 11,100,011,100,111,010,001,100,100,001,010,000,001,111,101,100,010,010,110 11011011), show that uplink burst frame that ONU sends is through FEC coding; As D instruction detected, for example there is no FEC function, or do not need to open FEC function, add length and be 64 bits by delimiter sequence provided by the invention: 0x B3BDD310 B2C50FA1 (binary sequence is 10,110,011,101,111,011,101,001,100,010,000,101,100,101,100,010,100,001,111 10100001), this sequence shows that the uplink burst frame that ONU sends passes through FEC coding, or does not need to open FEC function.
For example, or being used to refer to whether there is certain application function, the sequence of (FEC function) directly sends to ONU, the burst synchronization delimiter of ONU using received sequence as uplink burst frame to OLT.If burst synchronization delimiter is 0x E39D190A 07D896DB (binary sequence is 11,100,011,100,111,010,001,100,100,001,010,000,001,111,101,100,010,010,110 11011011), show that the uplink burst frame that ONU sends need to be through FEC coding; And burst synchronization delimiter is 0x B3BDD310 B2C50FA1 (binary sequence is 10,110,011,101,111,011,101,001,100,010,000,101,100,101,100,010,100,001,111 10100001), show that the uplink burst frame that ONU sends does not need the coding through FEC, or do not need to open FEC function.
Or each ONU presets the delimiter sequence of uplink burst frame, OLT is by detecting the burst synchronization delimiter sequence in the uplink burst frame receiving, for example, to determine whether need to carry out certain feature operation to this frame, FEC decoding.If burst synchronization delimiter is 0x E39D190A07D896DB (binary sequence is 11,100,011,100,111,010,001,100,100,001,010,000,001,111,101,100,010,010,110 11011011), show that the uplink burst frame that need to send ONU carries out FEC decoding; And work as burst synchronization delimiter, be 0x B3BDD310 B2C50FA1 (binary sequence is 10,110,011,101,111,011,101,001,100,010,000,101,100,101,100,010,100,001,111 10100001), show not need the uplink burst frame that ONU is sent to carry out FEC decoding, or do not need to open FEC function.
Further, OLT can require ONU to transmit different delimiter sequences by the line coding mechanism of ONU end.
So detection line encoding mechanism instruction before sending burst synchronization delimiter, and predetermined burst synchronization delimiter is selected in instruction according to line coding mechanism.
For example follow-on GPON system can be supported at least one of 9B10B coding and two kinds of modes of NRZ modulation.As OLT can define the delimiter instruction E corresponding with two kinds of mechanism and F:E corresponds to 9B10B encoding mechanism and F corresponds to NRZ modulation scheme in PLOAMd.ONU adds delimiter after corresponding instruction being detected, as detect E instruction add length be 40 bits by delimiter sequence provided by the invention: (binary sequence is 0x BF05224F39: 1011111100000101001000100100111100111001); As detected, add length after F instruction and be 32 bits by delimiter sequence provided by the invention: 0x A56679E0 (binary one 0100101011001100111100111100000).Or in the PLOAMd instruction that ONU can send by OLT, defined delimiter sequence is added in uplink burst frame, and wherein OLT sends corresponding delimiter sequence according to the encoding mechanism of ONU; As detect ONU end for 9B10B encodes, add length be 40 bits by delimiter sequence provided by the invention: (binary sequence is 0x BF05224F39: 1011111100000101001000100100111100111001); As detect ONU end for NRZ modulation scheme add length be 32 bits by delimiter sequence provided by the invention: 0x A56679E0 (binary one 0100101011001100111100111100000).
The embodiment of the present invention provides the method that meets the up transmission frame that is applied to GPON system of future generation, has wherein adopted more excellent delimiter sequence, and the sequence that the embodiment of the present invention provides can effectively increase system flexibility ratio.
The embodiment of the present invention provides the equipment that sends up transmission frame in a kind of EPON simultaneously, in application, can be used as optical network unit.As shown in Figure 3, in EPON, send the structured flowchart of the equipment 30 of up transmission frame.In the present embodiment, the equipment 30 that sends up transmission frame in EPON comprises: lead code transmitting element 301, synchronization delimitation symbol transmitting element 303, a burst frame transmitting element 305, transmission convergence layer frame frame head transmitting element 307 and transmission convergence layer frame data transmitting element 309.
Lead code transmitting element 301 sends lead code by the time slot distributing.In concrete enforcement, it is the 1010 1010... sequence of (being comprised of 10 circulations) (hexadecimal is 0x AA...) that lead code is preferentially selected binary sequence.
After sending lead code, synchronization delimitation symbol transmitting element 303 sends burst synchronization delimiter, the synchronization delimitation symbol nonzero value sending is identical with null value number, and the nonzero value number of the odd bits of delimiter sequence equals the null value number of even bit, and the nonzero value number of even bit equals the null value number of odd bits; Its odd bits null value number is N, and odd bits nonzero value number is M, meets relation | N-M|≤1, and the difference of N and M is not more than 1; It is X that synchronization delimitation symbol connects zero number, and the continuous number of non-zero is Y, meets to close to be | X-Y|≤1.
A burst frame transmitting element 305 is for sending burst frame head.
Transmission convergence layer frame frame head transmitting element 307 is for sending transmission convergence layer frame frame head.
Transmission convergence layer frame data transmitting element 309 is for sending transmission convergence layer frame data.
Further comprise, instruction detection unit 311, the command information in the downlink broadcast frame sending for detection of optical line terminal, synchronization delimitation symbol transmitting element 303 selects predetermined synchronization delimitation symbol to send according to this command information.The command information here can be application function selection instruction or application function selection instruction or uplink transmission rate information, also can carry 2 or 3 in above-mentioned information in application simultaneously.
When lead code is 1010 1010... sequence, the burst synchronization delimiter hexadecimal representation that synchronization delimitation symbol transmitting element 303 sends is: A56679E0, and this burst synchronization delimiter is shown with binary form: 10100101011001100111100111100000; Or
Described burst synchronization delimiter hexadecimal representation is: BF05224F39, this burst synchronization delimiter is shown with binary form: 1011111100000101001000100100111100111001.
When lead code is 1010 1010... sequence, one of the burst synchronization delimiter that synchronization delimitation symbol transmitting element 303 sends is following hexadecimal sequence:
F85299、83D699、B7690F0、3BD42C9、2F760D21、08367A57、9B52FC60、B94F9606、AD4CC30F、A5F6870CC、A05F33969、FA9561A4CC、BF64638169、A1C10DEED1B、EE6504B960F、AD48167E33C、ADF52906E4C3、A549F27BCC0C、3319?234F、82?5F1EA5CC、A1?7093?1EF6、BF?16CE?0469、8F?4F68?4699、EA50123CD1FB19A7、CE99CE5E?5028B41F、E39D190A?07D896DB、B3BDD310B2C50FA1。
If preamble sequence changes 0101 0101... (01 circulation forms) sequence into, the sequence resulting sequence of negate under binary system that adopts above-described embodiment to provide, meets burst synchronization delimiter characteristic of the present invention equally.For example 111110000101001010011001 negates are 000001111010110101100110.
The device of the embodiment of the present invention provides and has met the delimiter sequence that is applied to GPON system of future generation, and the sequence that the embodiment of the present invention provides can effectively increase system flexibility ratio.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or setting, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. a method that sends up transmission frame in gigabit passive optical network GPON, is characterized in that, described method comprises:
After linking successfully, by the time slot distributing, send lead code;
Send burst synchronization delimiter, the synchronization delimitation symbol nonzero value sending is identical with null value number, if lead code is the sequence that 10 circulations form, described burst synchronization delimiter comprises one of following sequence: A56679E0, AD4CC30F, CE99CE5E5028B41F or B3BDD310B2C50FA1, wherein above-mentioned sequence hexadecimal representation;
Send successively burst frame head, transmission convergence layer frame frame head and transmission convergence layer frame data.
2. the method for claim 1, is characterized in that, when lead code be 01 circulation form sequence time, described burst synchronization delimiter be lead code be 10 circulations form sequence time burst synchronization delimiter under binary system, carry out the sequence of negate acquisition.
3. the method for claim 1, it is characterized in that, described method also comprises before sending burst synchronization delimiter: detect the downlink broadcast frame that optical line terminal sends, obtain the delimiter information of carrying from optical line terminal the down physical layer operation management maintain instruction sending.
4. method as claimed in claim 3, is characterized in that, the concrete burst synchronization delimiter of delimiter Information Selection carrying in the down physical layer operation management maintain instruction sending according to described optical line terminal.
5. the method for claim 1, is characterized in that, described method also comprises:
Before sending burst synchronization delimiter, detect application function selection instruction, and select predetermined burst synchronization delimiter according to application function selection instruction.
6. the method for claim 1, is characterized in that, described default burst synchronization delimiter and function application instruction corresponding relation detect optical line terminal and determine to draw whether enable corresponding function application according to this burst synchronization delimiter.
7. the method for claim 1, is characterized in that, described method also comprises:
Before sending burst synchronization delimiter, detect application function selection instruction, and instruction selects predetermined burst to delimit according to line coding mechanism.
8. a method that sends up transmission frame in gigabit passive optical network GPON, is characterized in that, described method comprises:
After linking successfully, by the time slot distributing, send lead code;
Send burst synchronization delimiter, the synchronization delimitation symbol nonzero value sending is identical with null value number, if lead code is that described burst synchronization delimiter comprises one of following sequence by end to end the forming of a plurality of 10111011010100100001111000100110 orders example:
7C76510B、
A37670C9、
B9D43E68462BC197、
B7521F0648ADE879；
Send successively burst frame head, transmission convergence layer frame frame head and transmission convergence layer frame data.
9. in gigabit passive optical network GPON, send an equipment for up transmission frame, it is characterized in that, described equipment comprises:
Lead code transmitting element, sends lead code for the time slot by distributing;
Synchronization delimitation symbol transmitting element, be used for sending burst synchronization delimiter, the synchronization delimitation symbol nonzero value sending is identical with null value number, if lead code is the sequence that 10 circulations form, described burst synchronization delimiter comprises one of following sequence: A56679E0, A56679E0, AD4CC30F, CE99CE5E5028B41F or B3BDD310B2C50FA1, wherein above-mentioned sequence hexadecimal representation;
A burst frame transmitting element, for sending burst frame head;
Transmission convergence layer frame frame head transmitting element, for sending transmission convergence layer frame frame head;
Transmission convergence layer frame data transmitting element, for sending transmission convergence layer frame data.
10. equipment as claimed in claim 9, is characterized in that, described device also comprises:
Instruction detection unit, the command information in the downlink broadcast frame sending for detection of optical line terminal, synchronization delimitation symbol transmitting element selects predetermined synchronization delimitation symbol to send according to this command information.
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| CN200980155639.4A CN102318239B (en) | 2009-02-27 | 2009-10-19 | Method and device for transmitting upstream transmission frame in passive optical network |
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| PCT/CN2009/070585 WO2010096969A1 (en) | 2009-02-27 | 2009-02-27 | Method of sending upstream frame in passive optical network and apparatus thereof |
| CNPCT/CN2009/070585 | 2009-02-27 | ||
| PCT/CN2009/074496 WO2010096984A1 (en) | 2009-02-27 | 2009-10-19 | Method and device for transmitting an upstream transmission frame in a passive optical network |
| CN200980155639.4A CN102318239B (en) | 2009-02-27 | 2009-10-19 | Method and device for transmitting upstream transmission frame in passive optical network |
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