CN103428586A - Data transmission method and system in passive optical network system - Google Patents
Data transmission method and system in passive optical network system Download PDFInfo
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Abstract
The invention provides a data transmission method and system in a passive optical network system. The data transmission method comprises the steps: an optical link terminal (OLT) on local side utilizes a downlink physical channel to send downlink data to an optical network unit (ONU) on the user side; if the ONU cannot receive the downlink data sent by the OLT, the OLT sends a command to the ONU on the relevant physical channel to enable the ONU to adjust a physical channel for receiving data to be a channel value commanded by the OLT; the OLT and the ONU performs data transmission according to the adjusted channel value. The data transmission method and system in the passive optical network system shortens the communication recovery time of the OLT and the ONU and improves the communication efficiency.
Description
Technical field
The present invention relates to communication technical field, refer to especially data transmission method for uplink and system in a kind of passive optical network.
Background technology
Along with the development of network technology, can utilize the business such as a large amount of voice of Internet Transmission, data, video, therefore the requirement of bandwidth improved constantly, EPON (PON) is exactly to produce under this demand.
As shown in Figure 1, the PON system is comprised of the optical line terminal (OLT) of office's side, optical network unit (ONU) and the Optical Distribution Network (ODN) of user's side the topological structure of PON system usually, usually adopts point-to-multipoint network configuration.ODN is comprised of Passive Optical Components such as monomode fiber and optical branching device, optical connectors, for the physical connection between OLT and ONU provides light-transmitting medium.Mainly contain time division multiplexing (Time Division Multiplexing in the PON technology at present, abbreviation TDM) PON system, wavelength division multiplexing (Wavelength Division Multiplexing, abbreviation WDM) PON system, OFDM (Orthogonal Frequency Division Multiplexing, be called for short OFDM) PON system and mixing PON system, mix the PON system and comprise Wave time division mixing PON system, frequency-division and time-division mixing PON system etc. and wavelength-division frequency-division and time-division mixing PON system.
In time-multiplexed PON system, gigabit passive optical network (Gigabit-Capable Passive Optical Network for example, referred to as GPON) system, Ethernet passive optical network (Ethernet Passive Optical Network, be called for short EPON) system, in 10-Gigabit-capable passive optical network (being called for short XG-PON) system and 10-Gigabit-capable EPON system, the transfer of data of down direction (by OLT to ONU) adopts broadcast mode, each ONU receives respectively all frames, again according to ONU-ID, GEM-Port ID, the Allocation-ID(configuration ID), LLID (Logical Link identity, , be called for short LLID) etc. information obtain one's own frame.For the transfer of data of up direction (from ONU to OLT), because each ONU need to share transmission medium, so each ONU should be in OLT arranges transmit ascending data to the time slot of oneself.
In the WDM-PON system, there is the optical transmitting set of a plurality of different wave lengths at the OLT place, the optical wavelength of each optical transmitting set is respectively λ d1, λ d2 ..., λ dn, wherein λ d1 is that OLT sends the wavelength that downlink data adopts while communicating by letter with first ONU, λ d2 is that OLT sends the wavelength that downlink data adopts while communicating by letter with second ONU ..., λ dn is that OLT sends the wavelength that downlink data adopts while communicating by letter with n ONU; The generation wavelength of the reflector at each ONU place all is different from the emission wavelength of other ONU place reflectors, for example first ONU is λ u1 for the emission wavelength that sends the reflector of upstream data to OLT, second ONU is λ u2 for the emission wavelength that sends the reflector of upstream data to OLT,, n ONU is λ un for the emission wavelength that sends the reflector of upstream data to OLT; Adopt above-mentioned technology, OLT can send downlink data to all ONU simultaneously, and each ONU also can send upstream data simultaneously, and OLT and ONU are the structures that adopts point-to-point on optical channel.
In the OFDM-PON system, there are a plurality of different subcarriers at the OLT place, each subcarrier is respectively C1, C2, Cn, and each subcarrier is quadrature, OLT will send to the downlink data of first ONU to be modulated to (quantity of every group of subcarrier can be identical or different) on first group of subcarrier, OLT will send to the downlink data of second ONU to be modulated on second group of subcarrier, OLT will send to the downlink data of n ONU to be modulated on n group subcarrier, between the subcarrier group that sends to the downlink data of different ONU to adopt, do not occur simultaneously, be that different ONU is used different subcarrier groups, the subcarrier that ONU sends to the upstream data of OLT to adopt is that OLT distributes to ONU, the ONU place adopts to the subcarrier of current ONU transmission downlink data identical for the subcarrier that sends upstream data to OLT with OLT, also can be different.Adopt above-mentioned technology, OLT can send downlink data to all ONU simultaneously, and each ONU also can send upstream data simultaneously, and OLT and ONU are the structures that adopts point-to-point on optical channel.
The topological structure of Wave time division mixing PON system and frequency-division and time-division mixing PON system as shown in Figures 2 and 3, each OLT manages one group of ONU, described one group of ONU in Wave time division mixing PON system is same for the upgoing wave appearance that sends upstream data, and the downstream wavelength of downlink data receiving is also identical; Described one group of ONU in frequency-division and time-division mixing PON system is identical for the subcarrier group that sends upstream data, and the subcarrier group of downlink data receiving is also identical, and the different ONU in described one group of ONU are by time-multiplexed mode transmit ascending data.Downstream wavelength (subcarrier group) difference of different OLT, the up wavelength (subcarrier group) that every group of ONU of different OLT management used is also different.Each ONU can be used for receiving according to the order adjustment of OLT downstream wavelength (subcarrier group) and the up wavelength (subcarrier group) for sending upstream data of downstream signal, and is sending upstream data under the order of OLT in specific ascending time slot.
At above-mentioned WDM-PON, in OFDM-PON and mixing PON system, each ONU receives the unicast data on specific wavelength or specific subcarrier or subcarrier group that is modulated at that sends to oneself, isolation sends to the unicast data on other wavelength or other subcarriers or other subcarrier groups that is modulated at of other ONU, consider load balancing, protection is switched, when energy-conservation or OLT is the abnormal ONU in location, wavelength or subcarrier or subcarrier group that OLT need to adjust to one or more ONU other transmit and receive data, if ONU does not receive the adjustment wavelength of OLT transmission or the order of subcarrier or subcarrier group group, perhaps the speed of ONU adjustment wavelength or subcarrier is slower, wavelength after OLT can occur adopt upgrading or subcarrier or subcarrier group group are communicated by letter with ONU, ONU adopts the existing wavelength do not upgraded, between subcarrier or subcarrier group and OLT, communicate, above-mentioned situation can cause between OLT and ONU can not proper communication, in addition, can not proper communication if the wavelength of ONU work also can cause when drift occurs between OLT and ONU, prior art does not propose solution to the problems described above.
Summary of the invention
The technical problem to be solved in the present invention is to provide data transmission method for uplink and the system in a kind of passive optical network, can solve in mixed passive optical network system, the physical channel of ONU drifts about, when perhaps OLT order ONU adjusts physical channel and ONU and does not adjust to the physical channel of OLT order, problem that can not proper communication between OLT and ONU.
For solving the problems of the technologies described above, embodiments of the invention provide the data transmission method for uplink in passive optical network, comprising:
The optical line terminal OLT of local side utilizes the downlink physical passage to send the optical network unit ONU of downlink data to user's side;
If described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, makes described ONU the physical channel of the reception data of oneself be adjusted to the channel value of described OLT order;
Described OLT and described ONU are according to the channel value transmission data after adjusting.
Wherein, described OLT utilizes downlink physical passage transmission downlink data to comprise to the step of the optical network unit ONU of user's side:
Described OLT will send to the downlink data of described ONU to copy on all physical channels corresponding with described ONU, and send downlink data on corresponding physical channel at described ONU described ONU;
Perhaps
Described OLT sends downlink data to ONU on broadcast or multicast channel;
Perhaps
Described OLT sends downlink data to ONU at least two unicast channel.
Wherein, described OLT will send to the downlink data of described ONU to copy on all physical channels corresponding with described ONU, and the step of at described ONU, on corresponding physical channel, sending downlink data to described ONU comprises:
Described OLT will send to the downlink data of described ONU to copy on described the ONU physical channel of using at present and the physical channel that is about to use, perhaps OLT will send to the downlink data of described ONU to copy on described the ONU physical channel of using in the past and the physical channel of using at present, and send described downlink data on described physical channel described ONU.
Wherein, described OLT comprises to the step of ONU transmission downlink data on broadcast channel:
Described OLT is encapsulated in broadcast message in the downlink frame with a definite port-mark;
Described OLT sends to ONU after copying on all physical channels by described frame, and after making ONU receive above-mentioned information, identifying this information according to described port-mark is broadcast message.
Wherein, described OLT comprises to the step of ONU transmission downlink data on multicast channel:
Described OLT is encapsulated in multicast information in the downlink frame with a definite port-mark;
Described OLT sends to ONU after copying on physical channel corresponding to multicast group by described frame, and after making the ONU of corresponding multicast group receive above-mentioned information, identifying this information according to described port identification information is multicast information.
Wherein, described OLT comprises to the step of ONU transmission downlink data at least two unicast channel:
Described OLT is encapsulated in unicast info in the downlink frame had port-mark that should ONU;
OLT sends to ONU after copying on physical channel corresponding at least two clean cultures by described frame, and after making corresponding ONU receive above-mentioned information, identifying this information according to described port-mark is the unicast info that OLT sends to oneself.
Wherein, if described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, and the step that makes described ONU that the channel value of described OLT order is adjusted to in the physical channel of the reception data of oneself comprises:
After if ONU can not receive the downlink data of OLT transmission, described OLT adjusts by one the wavelength that downlink data adopts, the order of subcarrier or subcarrier group, in unicast channel, send to corresponding ONU on multicast channel or broadcast channel, perhaps at the wavelength channel of the current use of described ONU or subcarrier passage or subcarrier group passage with on the wavelength channel after adjusting or subcarrier passage or subcarrier group passage, send to corresponding ONU, perhaps at the wavelength channel of the current use of described ONU or subcarrier passage or subcarrier group passage with on the wavelength channel before adjusting or subcarrier passage or subcarrier group passage, send to corresponding ONU, make described ONU the physical channel of the reception data of oneself be adjusted to wavelength value or subcarrier or the value corresponding to subcarrier group of OLT order.
Wherein, if described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, and the step that makes described ONU that the channel value of described OLT order is adjusted to in the physical channel of the reception data of oneself comprises:
After if ONU can not receive the downlink data of OLT transmission, OLT first sends an order to corresponding ONU by unicast channel, and ONU adjusts to the physical channel of the reception data of oneself according to described order the value of OLT order;
OLT is that described ONU distributes upstream bandwidth, if OLT does not receive the upstream data of described ONU response in the given time, OLT by described order on specified wavelength passage or subcarrier passage or subcarrier group passage, send to described ONU, described ONU is not adjusted into specified wavelength passage or subcarrier passage or subcarrier group passage by the physical channel of oneself receive the upstream bandwidth of OLT distribution within the described ticket reserving time after.After ONU receives described order on described specified wavelength passage or subcarrier passage or subcarrier group passage, described ONU adjusts to the physical channel of the reception data of oneself wavelength or subcarrier or the value corresponding to subcarrier group of described OLT order.
Wherein, if described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, and the step that makes described ONU that the channel value of described OLT order is adjusted to in the physical channel of the reception data of oneself comprises:
After if ONU can not receive the downlink data of OLT transmission, OLT by an order directly on specified wavelength passage or subcarrier passage or subcarrier group passage, send to described ONU, described ONU is not adjusted into specified wavelength passage or subcarrier passage or subcarrier group passage by the physical channel of oneself receive the upstream bandwidth of OLT distribution within the described ticket reserving time after; After ONU receives described order on described specified wavelength passage or subcarrier passage or subcarrier group passage, ONU adjusts to the physical channel of the reception data of oneself wavelength or subcarrier or the value corresponding to subcarrier group of described OLT order.
Wherein, said method also comprises:
After OLT has adjusted the physical channel of reception data at described ONU, distribute upstream bandwidth to described ONU;
OLT receives the upstream data that described ONU responds under described upstream bandwidth, if do not receive in the given time the response data of ONU, OLT is in wavelength or subcarrier or the subcarrier group of the current use of ONU, and/or, on the wavelength or subcarrier or subcarrier group originally used, send this ONU and receive the order of the physical channel of adjustment reception data to specified wavelength or subcarrier or subcarrier group.
Embodiments of the invention also provide a kind of passive optical network, comprising: the optical line terminal OLT of local side, and the optical network unit ONU of Optical Distribution Network ODN and a plurality of user's sides, wherein, described ODN is connected with described OLT, and ONU is connected with described ODN; Described OLT utilizes the downlink physical passage to send downlink data to described ONU;
If described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, makes described ONU the physical channel of the reception data of oneself be adjusted to the channel value of described OLT order;
Described OLT and described ONU are according to the channel value transmission data after adjusting.
The beneficial effect of technique scheme of the present invention is as follows:
In such scheme, send an order by described OLT to described ONU on the related physical passage, make described ONU the physical channel of the reception data of oneself be adjusted to the channel value of described OLT order; While having guaranteed that the physical channel of transmission data of OLT and the physical channel that ONU receives upstream data are not inconsistent, ONU can receive the order that OLT sends, and has shortened the time of recovering communication between OLT and ONU, improves communication efficiency.
The accompanying drawing explanation
The topology diagram that Fig. 1 is the GPON system;
Fig. 2 is for mixing the topology diagram of PON;
Fig. 3 mixes the topology diagram of PON for another;
The flow chart that Fig. 4 is the data transmission method for uplink in passive optical network of the present invention.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 4, embodiments of the invention provide the data transmission method for uplink in a kind of passive optical network, comprising:
Step 11, the optical line terminal OLT of local side utilizes the downlink physical passage to send the optical network unit ONU of downlink data to user's side;
This embodiment of the present invention sends an order to described ONU by described OLT on the related physical passage, makes described ONU the physical channel of the reception data of oneself be adjusted to the channel value of described OLT order; While having guaranteed that the physical channel of transmission data of OLT and the physical channel that ONU receives upstream data are not inconsistent, ONU can receive the order that OLT sends, and has shortened the time of recovering communication between OLT and ONU, improves communication efficiency.
Wherein, in another embodiment of the present invention, step 11 comprises:
Step 111, described OLT will send to the downlink data of described ONU to copy on all physical channels corresponding with described ONU, and send downlink data on corresponding physical channel at described ONU described ONU; Particularly, described OLT will send to the downlink data of described ONU to copy on described the ONU physical channel of using at present and the physical channel that is about to use, perhaps OLT will send to the downlink data of described ONU to copy on described the ONU physical channel of using in the past and the physical channel of using at present, and send described downlink data on described physical channel described ONU.
Perhaps
Step 112, described OLT sends downlink data to ONU on broadcast or multicast channel; Particularly, described OLT is encapsulated in broadcast message in the downlink frame with a definite port-mark; Described OLT sends to ONU after copying on all physical channels by described frame, and after making ONU receive above-mentioned information, identifying this information according to described port-mark is broadcast message; During multicast, described OLT is encapsulated in multicast information in the downlink frame with a definite port-mark; Described OLT sends to ONU after copying on physical channel corresponding to multicast group by described frame, and after making the ONU of corresponding multicast group receive above-mentioned information, identifying this information according to described port identification information is multicast information.
Perhaps
Step 113, described OLT sends downlink data to ONU at least two unicast channel; Particularly, described OLT is encapsulated in unicast info in the downlink frame had port-mark that should ONU; OLT sends to ONU after copying on physical channel corresponding at least two clean cultures by described frame, and after making corresponding ONU receive above-mentioned information, identifying this information according to described port-mark is the unicast info that OLT sends to oneself.
In another embodiment of the present invention, step 12 comprises:
Step 121, after if ONU can not receive the downlink data of OLT transmission, described OLT adjusts by one the wavelength that downlink data adopts, the order of subcarrier or subcarrier group, in unicast channel, send to corresponding ONU on multicast channel or broadcast channel, perhaps at the wavelength channel of the current use of described ONU or subcarrier passage or subcarrier group passage with on the wavelength channel after adjusting or subcarrier passage or subcarrier group passage, send to corresponding ONU, perhaps at the wavelength channel of the current use of described ONU or subcarrier passage or subcarrier group passage with on the wavelength channel before adjusting or subcarrier passage or subcarrier group passage, send to corresponding ONU, make described ONU the passage of the reception data of oneself be adjusted to wavelength value or subcarrier or the value corresponding to subcarrier group of OLT order,
Perhaps
Step 122, if after ONU can not receive the downlink data of OLT transmission, OLT first sends an order to corresponding ONU by unicast channel, ONU adjusts to the physical channel of the reception data of oneself according to described order the value of OLT order; OLT is that described ONU distributes upstream bandwidth, if OLT does not receive the upstream data of described ONU response in the given time, OLT by described order on specified wavelength passage or subcarrier passage or subcarrier group passage, send to described ONU, described ONU is not adjusted into specified wavelength passage or subcarrier passage or subcarrier group passage by the physical channel of oneself receive the upstream bandwidth of OLT distribution within the described ticket reserving time after.After ONU receives described order on described specified wavelength passage or subcarrier passage or subcarrier group passage, described ONU adjusts to the physical channel of the reception data of oneself wavelength or subcarrier or the value corresponding to subcarrier group of described OLT order.
Perhaps step 123, after if ONU can not receive the downlink data of OLT transmission, OLT by an order directly on specified wavelength passage or subcarrier passage or subcarrier group passage, send to described ONU, described ONU is not adjusted into specified wavelength passage or subcarrier passage or subcarrier group passage by the physical channel of oneself receive the upstream bandwidth of OLT distribution within the described ticket reserving time after; After ONU receives described order on described specified wavelength passage or subcarrier passage or subcarrier group passage, ONU adjusts to the physical channel of the reception data of oneself wavelength or subcarrier or the value corresponding to subcarrier group of described OLT order.
Further, method described above can also comprise:
After OLT has adjusted the physical channel of reception data at described ONU, distribute upstream bandwidth to described ONU;
OLT receives the upstream data that described ONU responds under described upstream bandwidth, if do not receive in the given time the response data of ONU, OLT is in wavelength or subcarrier or the subcarrier group of the current use of ONU, and/or, on the wavelength or subcarrier or subcarrier group originally used, send this ONU and adjust the order of the physical channel of reception data to specified wavelength or subcarrier or subcarrier group.
In the situation that do not conflict, above-described embodiment and the feature in embodiment in the application can combine mutually.
Describe the realization of above-described embodiment in detail below in conjunction with the topological structure of Wave time division mixing PON and quadrature frequency-division and time-division mixing PON system:
Example one (broadcast message being copied on all physical channels, then the specific broadcast of definition and multicast GEM Port-ID)
The topological structure of Wave time division mixing PON system and quadrature frequency-division and time-division mixing PON system as shown in Figures 2 and 3.
A specific GEM Port-ID value, the GEM Port-ID that for example value is 0xFFFF is for transmitting broadcast data, this value is system default value (in other embodiment, also can select OLT to send to ONU for the GEM PortID value of transmitting broadcast data);
Corresponding to the step 112 in above-described embodiment, OLT and ONU adopt following step to complete the transmission of broadcast data:
Step 1: in Wave time division mixing PON system, OLT is encapsulated in broadcast data in the GEM frame that the value of GEM Port-ID is 0xFFFF, and this broadcast data is copied on all downstream wavelength, and OLT sends above-mentioned broadcast data on all wavelengths passage; In quadrature frequency-division and time-division mixing PON system, OLT is encapsulated in broadcast data in the GEM frame that the value of GEM Port – ID is 0xFFFF, and by this data Replica on all downlink sub-carrier or subcarrier group, the number of subcarriers of each subcarrier group can be the same or different, and OLT sends above-mentioned broadcast data on all subcarriers or subcarrier group passage;
Step 2: after the ONU of Wave time division mixing PON system receives above-mentioned data, according to the value of GEM Port-ID, be that 0xFFFF judges that the content of this GEM frame is broadcast data, ONU receives and resolves described broadcast data; In quadrature frequency-division and time-division mixing PON system, after ONU receives above-mentioned data, according to the value of GEM Port-ID, be that 0xFFFF judges that the content of this GEM frame is broadcast data, ONU receives and resolves described broadcast data.
Corresponding to the step 113 in above-described embodiment, OLT and ONU adopt following step to complete the transmission of multicast packet:
The Port-ID of the GEM for transport multicast information that step 1:OLT will distribute to ONU is carried on the ONU management control interface information and sends to described ONU, and notify the described GEM Port-ID of this ONU be multicast GEM Port-ID(in other embodiments, the Port-ID of the GEM for transport multicast information that also can will distribute to ONU for OLT and this multicast group number information be carried on the ONU management control interface information and send to described ONU);
After step 2:ONU receives the message of the distribution multicast GEM Port-ID that OLT sends in step 1, ONU stores the value of described multicast GEM Port-ID;
Step 3: in Wave time division mixing PON system, OLT is encapsulated in multicast packet in the GEM frame of GEM Port-ID value for the multicast GEM Port-ID to should multicast, and by this data Replica on the downstream wavelength corresponding to all ONU to should multicast group comprising, OLT sends above-mentioned multicast packet on above-mentioned downstream wavelength passage; In quadrature frequency-division and time-division mixing PON system, OLT is encapsulated in multicast packet in the GEM frame of GEM Port-ID value for the multicast GEM Port-ID to should multicast, and by this data Replica on the downlink sub-carrier or subcarrier group corresponding to all ONU to should multicast group comprising, OLT sends above-mentioned multicast packet on above-mentioned downlink sub-carrier or subcarrier group passage;
Step 4: after the ONU of Wave time division mixing PON system receives above-mentioned data, according to the value of GEM Port-ID, for local multicast GEM Port-ID value of storing, judge that the content of this GEM frame is multicast packet, ONU receives and resolves described multicast packet; In quadrature frequency-division and time-division mixing PON system, judge that for local multicast GEM Port-ID value of storing the content of this GEM frame is multicast packet according to the value of GEM Port-ID, ONU receives and resolves described multicast packet;
In the present embodiment, OLT distributes multicast GEM Port-ID by the ONU management control interface information to ONU, also can adopt in other embodiments OLT to pass through physical layer operations management maintenance message, extended operation management maintenance message or embedded operation management maintenance message and distribute multicast GEM Port-ID to ONU.
In the present embodiment, OLT and ONU adopt specific gigabit Ethernet method for packing port-mark to send broadcast message and multicast information, also can adopt in other embodiments OLT and ONU to adopt specific LLID and/or VLAN ID to send broadcast message and multicast information.
In the present embodiment, the wavelength of the different ONU transmission upstream datas of an OLT management or subcarrier or subcarrier group are identical, and different ONU send upstream data according to time division multiplexing mode, method of the present invention also goes for the situation that an ONU monopolizes data feedback channel, perhaps the different ONU of an OLT management adopt different wavelength or subcarrier or subcarrier group to send upstream data, now different ONU can send upstream data simultaneously, in these cases, OLT copies to all downstream wavelength by broadcast message, send to all ONU after downlink sub-carrier or downlink sub-carrier group, OLT sends to corresponding ONU after multicast information is copied to downstream wavelength, downlink sub-carrier or the downlink sub-carrier group that all ONU corresponding to this multicast group are corresponding.
In step 12 in the above-described embodiments, wavelength, subcarrier or the subcarrier group of OLT before ONU adjusts and adjust after wavelength, subcarrier or subcarrier group on all sends the order of adjustment ONU reception wavelength, comprise that at first two kinds of situation: 1.OLT send by unicast channel the order that adjustment receives wavelength, then under unmatched situation occurs, adopt two passages (comprising on wavelength, subcarrier or the subcarrier group and wavelength, subcarrier or subcarrier group after adjustment before adjusting) to send the order of adjusting wavelength, subcarrier or subcarrier group simultaneously; Adjust 2.OLT directly adopt two passages to send simultaneously the order that receives wavelength, subcarrier or subcarrier group;
Particularly; when considering that load balancing, protection are switched, energy-conservation or OLT is during for the abnormal ONU in location; wavelength, subcarrier or subcarrier group that OLT need to adjust to one or more ONU other transmit and receive data, and OLT and ONU can adopt one of following two kinds of methods to complete the adjustment of wavelength, subcarrier or the subcarrier group of ONU downlink data receiving:
Method one:
Step 1:OLT will order ONU to adjust the Command encapsulate of wavelength (subcarrier or subcarrier group) of downlink data receiving at the ONU management control interface information, in other embodiment, also can adopt the Command encapsulate of the wavelength (subcarrier or subcarrier group) of an ONU adjustment downlink data receiving in physical layer operations management maintenance message, extended operation management maintenance message or embedded operation management maintenance message, and send mentioned order on the unicast channel of a corresponding ONU;
Step 2:ONU receives OLT and the reception wavelength of oneself (subcarrier or subcarrier group) is adjusted into to wavelength (subcarrier or the subcarrier group) value of OLT order after the adjustment of step 1 transmission receives wavelength (subcarrier or subcarrier group) order;
Step 3:OLT distributes upstream bandwidth to ONU after ONU has adjusted wavelength (subcarrier or subcarrier group) value, if OLT receives the upstream data of ONU response, jumps to step 4; If OLT does not receive the upstream data of ONU response within the scheduled time, its upper adjustment to ONU forwarding step 1 of wavelength (subcarrier or subcarrier group) after adjusting of the OLT reception wavelength (subcarrier or subcarrier group) original at ONU and order receives the order of wavelength (subcarrier or subcarrier group), and jumps to step 2;
Step 4:OLT communicates by letter on the wavelength after adjustment (subcarrier or subcarrier group) with ONU.
Method two
Step 1:OLT adjusts ONU the Command encapsulate of wavelength (subcarrier or subcarrier group) of downlink data receiving at the ONU management control interface information, in other embodiment, also can adopt the Command encapsulate of the wavelength (subcarrier or subcarrier group) of an ONU adjustment downlink data receiving in physical layer operations management maintenance message, in extended operation management maintenance message or embedded operation management maintenance message, and send mentioned order on wavelength (subcarrier or the subcarrier group) passage after the wavelength (subcarrier or subcarrier group) of the current use of this ONU and this ONU adjust,
Step 2:ONU receives OLT and the reception wavelength of oneself (subcarrier or subcarrier group) is adjusted into to wavelength (subcarrier or the subcarrier group) value of OLT order after the adjustment of step 1 transmission receives wavelength (subcarrier or subcarrier group) order.
Step 3:OLT distributes upstream bandwidth to ONU after ONU has adjusted wavelength (subcarrier or subcarrier group) value, if OLT receives the upstream data of ONU response, jumps to step 4; If OLT does not receive the upstream data of ONU response within the scheduled time, jump to step 1;
On step 4:OLT and the ONU wavelength (subcarrier or subcarrier group) after adjustment, communicate.
In step 12 in above-described embodiment, can also realize in the following manner:
OLT adjusts upper transmission of specific wavelength (subcarrier or subcarrier group) order that ONU receives wavelength (subcarrier or subcarrier group), comprise that at first two kinds of situation: 1.OLT send and adjust the order that receives wavelength by unicast channel, then occurring in unmatched situation to adopt special modality to send the order of adjusting wavelength; Adjust 2.OLT directly adopt special modality to send the order that receives wavelength;
When considering that load balancing, protection are switched, energy-conservation or OLT is during for the abnormal ONU in location; wavelength or subcarrier group that OLT need to adjust to one or more ONU other transmit and receive data, and OLT and ONU can adopt one of following two kinds of methods to complete the adjustment of wavelength, subcarrier or the subcarrier group of ONU downlink data receiving:
Method one, at first OLT sends and adjusts the order that receives wavelength (subcarrier or subcarrier group) by unicast channel, is then occurring in unmatched situation to adopt special modality to send the order of adjusting wavelength (subcarrier or subcarrier group);
Step 1:OLT will order ONU to adjust the Command encapsulate of wavelength (subcarrier or subcarrier group) of downlink data receiving at the ONU management control interface information, in other embodiment, also can adopt the message that will order an ONU to adjust the wavelength (subcarrier or subcarrier group) of downlink data receiving to be encapsulated in physical layer operations management maintenance message, extended operation management maintenance message or embedded operation management maintenance message, and send mentioned order on the unicast channel of a corresponding ONU;
Step 2:ONU receives OLT and the reception wavelength of oneself (subcarrier or subcarrier group) is adjusted into to the wavelength value (subcarrier or subcarrier group) of OLT order after the adjustment of step 1 transmission receives wavelength (subcarrier or subcarrier group) order;
Step 3:OLT distributes upstream bandwidth to ONU after ONU has adjusted wavelength (subcarrier or subcarrier group) value, if OLT receives the upstream data of ONU response, jumps to step 4, if OLT does not receive the upstream data of ONU response within the scheduled time, OLT receives the order of wavelength (subcarrier or subcarrier group) in the upper adjustment to ONU forwarding step 1 of specific wavelength (subcarrier or subcarrier group), ONU does not adjust to specific wavelength (subcarrier or subcarrier group) value by the wavelength of the downlink data receiving of self (subcarrier or subcarrier group) value receive the downlink data of OLT in special time after, ONU receives after the order of above-mentioned adjustment wavelength (subcarrier or subcarrier group) of OLT that the order according to OLT completes the tuning of self operation wavelength (subcarrier or subcarrier group), and jump to step 3.
Step 4:OLT and the ONU wavelength (subcarrier or subcarrier group) after adjustment communicates.
Method two OLT directly adopts special modality to send and adjusts the order that receives wavelength;
Step 1:OLT notifies this ONU to receive the order on specific wavelength (subcarrier or subcarrier group) on the wavelength (subcarrier or subcarrier group) of the current use of ONU;
After step 2:ONU receives mentioned order, receive wavelength and be set to described specific wavelength (subcarrier or subcarrier group), in other embodiment, also can adopt ONU to utilize a special receiver to receive the order of described specific wavelength (subcarrier or subcarrier group);
Step 3:OLT will order ONU to adjust the Command encapsulate of wavelength (subcarrier or subcarrier group) of downlink data receiving at the ONU management control interface information, in other embodiment, also can adopt the message that will order an ONU to adjust the wavelength (subcarrier or subcarrier group) of downlink data receiving to be encapsulated in physical layer operations management maintenance message, in extended operation management maintenance message or embedded operation management maintenance message, and the above-mentioned adjustment of transmission receives wavelength (subcarrier or subcarrier group) order on described specific wavelength (subcarrier or subcarrier group) passage,
Step 4:ONU receives OLT and the reception wavelength of oneself is adjusted into to wavelength (subcarrier or the subcarrier group) value of OLT order after the adjustment of step 3 transmission receives wavelength (subcarrier or subcarrier group) order;
Step 5:OLT distributes upstream bandwidth to ONU after ONU has adjusted wavelength (subcarrier or subcarrier group) value, if OLT receives the upstream data of ONU response, jumps to step 6; If OLT does not receive the upstream data of ONU response within the scheduled time, OLT notifies this ONU to receive the order on specific wavelength (subcarrier or subcarrier group) on the wavelength of the current use of ONU and/or the original wavelength (subcarrier or subcarrier group) used, and jumps to step 2.
Step 6:OLT and ONU communicate according to the wavelength after adjusting.
In another embodiment of the present invention, also provide a kind of passive optical network, comprising: OLT, ODN and a plurality of ONU, wherein, described ODN is connected with described OLT, and ONU is connected with described ODN; The optical line terminal OLT of local side utilizes the downlink physical passage to send the optical network unit ONU of downlink data to user's side; If described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, makes described ONU the physical channel of the reception data of oneself be adjusted to the channel value of described OLT order; Described OLT and described ONU are according to the channel value transmission data after adjusting.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. the data transmission method for uplink in a passive optical network, is characterized in that, comprising:
The optical line terminal OLT of local side utilizes the downlink physical passage to send the optical network unit ONU of downlink data to user's side;
If described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, makes described ONU the physical channel of the reception data of oneself be adjusted to the channel value of described OLT order;
Described OLT and described ONU are according to the channel value transmission data after adjusting.
2. the data transmission method for uplink in passive optical network according to claim 1, is characterized in that, described OLT utilizes downlink physical passage transmission downlink data to comprise to the step of the optical network unit ONU of user's side:
Described OLT will send to the downlink data of described ONU to copy on all physical channels corresponding with described ONU, and send downlink data on corresponding physical channel at described ONU described ONU;
Perhaps
Described OLT sends downlink data to ONU on broadcast or multicast channel;
Perhaps
Described OLT sends downlink data to ONU at least two unicast channel.
3. the data transmission method for uplink in passive optical network according to claim 2, it is characterized in that, described OLT will send to the downlink data of described ONU to copy on all physical channels corresponding with described ONU, and the step of at described ONU, on corresponding physical channel, sending downlink data to described ONU comprises:
Described OLT will send to the downlink data of described ONU to copy on described the ONU physical channel of using at present and the physical channel that is about to use, perhaps OLT will send to the downlink data of described ONU to copy on described the ONU physical channel of using in the past and the physical channel of using at present, and send described downlink data on described physical channel described ONU.
4. the data transmission method for uplink in passive optical network according to claim 2, is characterized in that, described OLT comprises to the step of ONU transmission downlink data on broadcast channel:
Described OLT is encapsulated in broadcast message in the downlink frame with a definite port-mark;
Described OLT sends to ONU after copying on all physical channels by described frame, and after making ONU receive above-mentioned information, identifying this information according to described port-mark is broadcast message.
5. the data transmission method for uplink in passive optical network according to claim 2, is characterized in that, described OLT comprises to the step of ONU transmission downlink data on multicast channel:
Described OLT is encapsulated in multicast information in the downlink frame with a definite port-mark;
Described OLT sends to ONU after copying on physical channel corresponding to multicast group by described frame, and after making the ONU of corresponding multicast group receive above-mentioned information, identifying this information according to described port identification information is multicast information.
6. the data transmission method for uplink in passive optical network according to claim 2, is characterized in that, described OLT comprises to the step of ONU transmission downlink data at least two unicast channel:
Described OLT is encapsulated in unicast info in the downlink frame had port-mark that should ONU;
OLT sends to ONU after copying on physical channel corresponding at least two clean cultures by described frame, and after making corresponding ONU receive above-mentioned information, identifying this information according to described port-mark is the unicast info that OLT sends to oneself.
7. the data transmission method for uplink in passive optical network according to claim 1, it is characterized in that, if described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, and the step that makes described ONU that the channel value of described OLT order is adjusted to in the physical channel of the reception data of oneself comprises:
After if ONU can not receive the downlink data of OLT transmission, described OLT adjusts by one the wavelength that downlink data adopts, the order of subcarrier or subcarrier group, in unicast channel, send to corresponding ONU on multicast channel or broadcast channel, perhaps at the wavelength channel of the current use of described ONU or subcarrier passage or subcarrier group passage with on the wavelength channel after adjusting or subcarrier passage or subcarrier group passage, send to corresponding ONU, perhaps at the wavelength channel of the current use of described ONU or subcarrier passage or subcarrier group passage with on the wavelength channel before adjusting or subcarrier passage or subcarrier group passage, send to corresponding ONU, make described ONU the physical channel of the reception data of oneself be adjusted to wavelength value or subcarrier or the value corresponding to subcarrier group of OLT order.
8. the data transmission method for uplink in passive optical network according to claim 1, it is characterized in that, if described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, and the step that makes described ONU that the channel value of described OLT order is adjusted to in the physical channel of the reception data of oneself comprises:
After if ONU can not receive the downlink data of OLT transmission, OLT first sends an order to corresponding ONU by unicast channel, makes ONU according to described order, the physical channel of the reception data of oneself be adjusted to the value of OLT order;
OLT is that described ONU distributes upstream bandwidth, if OLT does not receive the upstream data of described ONU response in the given time, OLT by described order on specified wavelength passage or subcarrier passage or subcarrier group passage, send to described ONU, described ONU is not adjusted into specified wavelength passage or subcarrier passage or subcarrier group passage by the physical channel of oneself receive the upstream bandwidth of OLT distribution within the described ticket reserving time after.After ONU receives described order on described specified wavelength passage or subcarrier passage or subcarrier group passage, described ONU adjusts to the physical channel of the reception data of oneself wavelength or subcarrier or the value corresponding to subcarrier group of described OLT order.
9. the data transmission method for uplink in passive optical network according to claim 1, it is characterized in that, if described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, and the step that makes described ONU that the channel value of described OLT order is adjusted to in the physical channel of the reception data of oneself comprises:
After if ONU can not receive the downlink data of OLT transmission, OLT by an order directly on specified wavelength passage or subcarrier passage or subcarrier group passage, send to described ONU, described ONU is not adjusted into specified wavelength passage or subcarrier passage or subcarrier group passage by the physical channel of oneself receive the upstream bandwidth of OLT distribution within the described ticket reserving time after; After ONU receives described order on described specified wavelength passage or subcarrier passage or subcarrier group passage, ONU adjusts to the physical channel of the reception data of oneself wavelength or subcarrier or the value corresponding to subcarrier group of described OLT order.
10. the data transmission method for uplink in passive optical network according to claim 1, is characterized in that, also comprises:
After OLT has adjusted the physical channel of reception data at described ONU, distribute upstream bandwidth to described ONU;
OLT receives the upstream data that described ONU responds under described upstream bandwidth, if do not receive in the given time the response data of ONU, OLT is in wavelength or subcarrier or the subcarrier group of the current use of ONU, and/or, on the wavelength or subcarrier or subcarrier group originally used, send this ONU and adjust the order of the physical channel of reception data to specified wavelength or subcarrier or subcarrier group.
11. a passive optical network comprises: the optical line terminal OLT of local side, the optical network unit ONU of Optical Distribution Network ODN and a plurality of user's sides, wherein, described ODN is connected with described OLT, and ONU is connected with described ODN; It is characterized in that,
Described OLT utilizes the downlink physical passage to send downlink data to described ONU;
If described ONU can not receive the downlink data that described OLT sends, described OLT sends an order to described ONU on the related physical passage, makes described ONU the physical channel of the reception data of oneself be adjusted to the channel value of described OLT order;
Described OLT and described ONU are according to the channel value transmission data after adjusting.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104885384A (en) * | 2013-12-20 | 2015-09-02 | 华为技术有限公司 | Method and apparatus for limiting rate of optical network unit (onu) overall |
| CN107925502A (en) * | 2015-09-07 | 2018-04-17 | 华为技术有限公司 | A kind of method, apparatus and system of passive optical network communication |
| CN109756796A (en) * | 2017-11-01 | 2019-05-14 | 中兴通讯股份有限公司 | A kind of passive optical network downlink bandwidth transmission method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040228345A1 (en) * | 2003-05-16 | 2004-11-18 | Kyu-Hyung Cho | Apparatus and method for switching broadcast channel using VCC information |
| CN101212255A (en) * | 2006-12-29 | 2008-07-02 | 华为技术有限公司 | Dynamic bandwidth adjustment and fault protection method and device for optical access network |
| CN102291270A (en) * | 2010-06-21 | 2011-12-21 | 中兴通讯股份有限公司 | Management method and system of optical network units in passive optical network |
-
2012
- 2012-05-16 CN CN201210151325.0A patent/CN103428586B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040228345A1 (en) * | 2003-05-16 | 2004-11-18 | Kyu-Hyung Cho | Apparatus and method for switching broadcast channel using VCC information |
| CN101212255A (en) * | 2006-12-29 | 2008-07-02 | 华为技术有限公司 | Dynamic bandwidth adjustment and fault protection method and device for optical access network |
| CN102291270A (en) * | 2010-06-21 | 2011-12-21 | 中兴通讯股份有限公司 | Management method and system of optical network units in passive optical network |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104885384A (en) * | 2013-12-20 | 2015-09-02 | 华为技术有限公司 | Method and apparatus for limiting rate of optical network unit (onu) overall |
| CN104885384B (en) * | 2013-12-20 | 2017-04-19 | 华为技术有限公司 | Method and apparatus for limiting rate of optical network unit (onu) overall |
| US9985795B2 (en) | 2013-12-20 | 2018-05-29 | Huawei Technologies Co., Ltd. | Method and apparatus for optical network unit ONU overall rate limiting |
| CN107925502A (en) * | 2015-09-07 | 2018-04-17 | 华为技术有限公司 | A kind of method, apparatus and system of passive optical network communication |
| US10652635B2 (en) | 2015-09-07 | 2020-05-12 | Huawei Technologies Co., Ltd. | Passive optical network communications method and apparatus, and system |
| CN109756796A (en) * | 2017-11-01 | 2019-05-14 | 中兴通讯股份有限公司 | A kind of passive optical network downlink bandwidth transmission method and device |
| CN109756796B (en) * | 2017-11-01 | 2022-05-20 | 中兴通讯股份有限公司 | Passive optical network downlink bandwidth transmission method and device |
| US11405704B2 (en) | 2017-11-01 | 2022-08-02 | Zte Corporation | Downlink bandwidth transmission method and apparatus for passive optical network |
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