CN104869479A - Passive optical network architecture - Google Patents
Passive optical network architecture Download PDFInfo
- Publication number
- CN104869479A CN104869479A CN201410067675.8A CN201410067675A CN104869479A CN 104869479 A CN104869479 A CN 104869479A CN 201410067675 A CN201410067675 A CN 201410067675A CN 104869479 A CN104869479 A CN 104869479A
- Authority
- CN
- China
- Prior art keywords
- optical
- distribution network
- epon
- transceiver
- node
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Optical Communication System (AREA)
Abstract
The invention provides passive optical network architecture. The passive optical network architecture comprises a passive optical network access node, a plurality of optical distribution networks and a passive optical network reconfiguration node, wherein the passive optical network access node comprises m optical line terminal boards, and R optical transceivers are arranged on the m optical line terminal boards; the passive optical network reconfiguration node is used for connecting the passive optical network access node and the plurality of optical distribution networks; the passive optical network reconfiguration node is configured to dynamically connect each optical distribution network among the plurality of optical distribution networks to each optical transceiver among the R optical transceivers in the passive optical network access node in a one-to-one correspondence manner, or connect at least one optical distribution network among the plurality of optical distribution networks to the same optical transceiver among the R optical transceivers in the passive optical network access node.
Description
Technical field
The present invention relates to optical communication technique, particularly relate to a kind of EPON framework.
Background technology
At present, telecom operators arrange EPON (PON) widely.Have multiple optical line terminal plate (OLT board), also namely the access node of line termination boards (LT board) is positioned at the central control room of operator.Each OLT/LT plate has multiple PON port or optical transceiver.In current network, Optical Distribution Network (ODN) is an optical transceiver of the specific OLT/LT plate be connected to statically in access node, as shown in Figure 1.
On the one hand, the offered load of the ODN Access Network of PON changes in time and becomes, such as, along with the operating time.Particularly, higher in the load of the PON Access Network of commerce area, and on one's own time, load is lower.Such as from midnight to morning, the offered load of the ODN of PON is lower.In addition, the ODN network of operator takes up rate not high at the ONU in some region, also can cause the phenomenon that the OLT plate load of ODN network and correspondence is very low.On the other hand, power consumption is primary CAPEX for operator.If saving power is as much as possible an important problem.
But because the OLT plate in current PON access node is connected to its corresponding ODN statically, all optical transceivers and OLT plate must stay open, even if the offered load on some ODN is lower.Therefore, in current access node, inevitably power dissipation is caused.
In existing scheme, once the relation of optical receiver and ODN is determined, static state is constant.Therefore, even if the load on ODN is very little, optical transceiver can not be closed.Even if an OLT plate only exists an optical transceiver activated, this OLT plate can not be closed.These waste very high-power.
Therefore, how need to consider is operator's reduction power consumption.If some optical transceivers or some OLT/LT plates can be closed on OLT/LT plate, then greatly can save power.
Summary of the invention
Consider based on above-mentioned, the present invention proposes one settling mode effectively, to reduce the power consumption of the access node based on OLT, and do not need to change greatly existing network configuration and network element.
Propose a kind of EPON framework according to a first aspect of the invention, it comprises: EPON access node, and it comprises m block optical line terminal plate, on described m block optical line terminal plate, be provided with R optical transceiver; Multiple Optical Distribution Network; And EPON restructuring node, it is for connecting described EPON access node and described multiple Optical Distribution Network; Wherein, described EPON restructuring node is configured to the same optical transceiver in each optical transceiver of being dynamically connected to correspondingly by each Optical Distribution Network in described multiple Optical Distribution Network according to predetermined condition in R optical transceiver in described EPON access node or R the optical transceiver be connected to by least one Optical Distribution Network in described multiple Optical Distribution Network in described EPON access node.
Therefore, an ODN network can (1) be connected on an optical transceiver of certain OLT plate on access node by EPON in this EPON framework restructuring node, set up 1 to 1 relation; (2) be connected on same optical transceiver by multiple ODN network, the ODN network that formation one is large in logic, this sets up 1 to many relations.
Preferably, described EPON restructuring node comprises: spectral module, and it is connected with a described R optical transceiver; And optical switch module, it is for connecting described multiple Optical Distribution Network and described spectral module; Wherein, described optical switch module dynamically configures described spectral module according to described predetermined condition, with each optical transceiver be connected to correspondingly by each Optical Distribution Network in described multiple Optical Distribution Network in a described R optical transceiver or at least one Optical Distribution Network in described multiple Optical Distribution Network is connected to the same optical transceiver in a described R optical transceiver.
Preferably, described spectral module comprises R optical splitter, and each with the corresponding optical transceiver in a described R optical splitter connects; Described optical switch module comprises R optical switch, each with corresponding Optical Distribution Network in a described R optical switch connects, wherein, a jth optical switch in a described R optical switch has j port, it is corresponding to a jth optical splitter with the 1st in a described R optical splitter respectively, wherein 1≤j≤R, R and j is positive integer; Wherein, a described jth optical switch comes from corresponding described 1st to a jth optical splitter, dynamically select a jth optical splitter to a jth optical splitter, to select connected optical splitter with its connection or from corresponding described 1st according to described predetermined condition, is connected with the same optical transceiver in a described R optical transceiver with at least one Optical Distribution Network realized in described multiple Optical Distribution Network.
Preferably, the splitting ratio of the jth optical splitter in a described n optical splitter is 1: n-j+1.
Preferably, described predetermined condition comprises the load condition in network strategy and multiple Optical Distribution Network.
According to a second aspect of the invention, propose a kind of EPON restructuring node, it is for connected with passive optical-fiber network access node and multiple Optical Distribution Network, wherein said EPON access node comprises m block optical line terminal plate, R optical transceiver is provided with on described m block optical line terminal plate, wherein, a described R optical transceiver and described EPON node of recombinating is connected, and wherein, described EPON restructuring node is configured to: dynamically each Optical Distribution Network in described multiple Optical Distribution Network is connected to correspondingly each optical transceiver in a described R optical transceiver according to predetermined condition or at least one Optical Distribution Network in described multiple Optical Distribution Network is connected to the same optical transceiver in a described R optical transceiver.
By the present invention proposes a kind of good power save scheme, and give being connected flexibly between ODN with optical transceiver/OLT plate.The invention has the advantages that:
-do not need to upgrade to existing network insertion node and ODN network, and only need to arrange a new equipment before access node, also namely PON recombinates node.
-provide the flexibility of the relation between optical transceiver and ODN.
-achieve power according to load variations as much as possible to save.
Various aspects of the present invention are more clear by the explanation by specific embodiment hereinafter.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows PON Access Network configuration diagram of the prior art;
Fig. 2 shows PON optical-fiber network configuration diagram according to an embodiment of the invention;
Fig. 3 shows the structural representation of PON according to an embodiment of the invention restructuring node;
Fig. 4 a shows the configuration schematic diagram of the PON restructuring node for saving power according to an embodiment of the invention;
Fig. 4 b shows the configuration schematic diagram of node of recombinating for the PON saving power according to another embodiment of the invention;
Fig. 5 a shows the configuration schematic diagram of the PON restructuring node when ODN traffic carrying capacity is higher according to an embodiment of the invention;
Fig. 5 b shows the configuration schematic diagram of the PON restructuring node when ODN traffic carrying capacity is lower according to an embodiment of the invention;
Fig. 6 a shows the configuration schematic diagram of the restructuring of the PON when ODN traffic carrying capacity is lower node according to still another embodiment of the invention; And
Fig. 6 b shows the configuration schematic diagram of the restructuring of the PON when ODN traffic carrying capacity is lower node according to still another embodiment of the invention.
In the drawings, run through different diagrams, same or similar Reference numeral represents identical or corresponding parts or feature.
Embodiment
If optical transceiver can be closed as much as possible, and close OLT/LT plate as much as possible, then greatly can save power.Therefore EPON framework can be made to have following feature:
-reconfigure underloaded ODN, make it share identical optical transceiver, thus untapped optical transceiver can be closed after reconfiguring.
-according to predetermined condition, such as network strategy, loading condition etc., intensively ODN is connected to the optical transceiver on identical OLT/LT plate as much as possible, thus untapped OLT/LT plate can be closed to save power.
Therefore, the present invention is that PON proposes a kind of new framework.Invention introduces a kind of new network node (PON recombinate node, PON Reassembly Node, PRN).This framework with PRN has following function to meet above-mentioned feature:
If-need, dynamically can reconnect the optical transceiver on ODN to specific OLT.
If-need, an optical channel can be realized to serve multiple physics ODN, to form large logic ODN.In fact, this corresponds to the feature that above-mentioned multiple ODN shares same optical transceiver.
Fig. 2 shows PON optical-fiber network configuration diagram according to an embodiment of the invention.
Comprise EPON access node according to PON optical-fiber network framework of the present invention, it comprises m block optical line terminal plate, on m block optical line terminal plate, be provided with R optical transceiver.In addition, multiple Optical Distribution Network is comprised.Finally, EPON restructuring node is also comprised.As shown in Figure 2, before PON restructuring node is positioned at original access node, for connecting the optical transceiver in corresponding ODN and corresponding OLT plate, be also corresponding OLT.
At this, EPON restructuring node is configured to the same optical transceiver in each optical transceiver of being dynamically connected to correspondingly by each Optical Distribution Network in multiple Optical Distribution Network according to predetermined condition in R optical transceiver in EPON access node or R the optical transceiver be connected to by least one Optical Distribution Network in multiple Optical Distribution Network in EPON access node.
Fig. 3 shows the structural representation of PON according to an embodiment of the invention restructuring node.Should be appreciated that the recombinate structure of node of shown PON is only a specific embodiment.PON restructuring node can be changed to other structures, as long as it can realize above-mentioned feature of the present invention.
As shown in Figure 3, PON restructuring node comprises spectral module, and it is connected with multiple optical transceiver respectively.In addition, also comprise optical switch module, it is for connecting multiple Optical Distribution Network and spectral module.
Preferably, spectral module comprises the optical splitter that a group has different splitting ratios.And optical switch module comprises one group of optical switch, and optical switch has the port of different quantity, for corresponding with corresponding optical splitter.In operation, the port of the varying number of each optical switch connects from different optical splitters, to control the route that light signal arrives different ODN.
In this embodiment, assuming that access node has m block OLT plate, and every block OLT plate has the optical transceiver that n is connected to corresponding ODN.Only show each OLT plate with form briefly in figure 3, its embodiment can be similar with the execution mode in Fig. 2.
At this, a piece in m block OLT plate is selected as main OLT plate, and in multiple PON ports in the main OLT plate port of optical transceiver (also i.e.) one is selected as main PON port.Such as, in figure 3, the PON port one of OLT plate 1 and optical transceiver 1 is chosen as main OLT plate and main PON port respectively.For m block OLT plate and every block OLT plate has the situation of n optical transceiver, PON node of recombinating needs use mn optical splitter and mn optical switch (SW).Wherein, the splitting ratio of these optical splitters is arranged in the scope of 1: mn to 1: 1.And mn optical switch is arranged in the scope of 1 to mn at the port number that optical splitter side has.
Particularly, main PON port (port one in such as Fig. 3) is connected with first optical splitter, and its splitting ratio had was 1: mn (this depends on the total quantity of the optical transceiver in access node).The Article 1 of first optical splitter is connected with the optical switch (SW1) of first 1 × 1 along separate routes, and the remaining shunt of first optical splitter is connected with remaining mn-1 optical switch respectively.Thus, all ONU in different ODN can be reconfigured to main PON port and main OLT plate by PON node of recombinating.
On the other hand, the optical transceiver 2 in main OLT plate is connected with second optical splitter, and this second optical splitter has the splitting ratio of 1: mn-1.The Article 1 of this optical splitter is connected with a port of the optical switch (SW2) of second 2 × 1 along separate routes, and the remaining shunt of second optical splitter is connected with remaining mn-2 optical switch (all the other optical switches not comprising first and second optical switch namely in mn optical switch) respectively.At this, the splitting ratio of optical splitter declines gradually, and the port number of optical switch will increase gradually.
Similarly, as best seen in figure 3, all follow-up optical transceivers in different OLT plates are connected with the optical splitter of the splitting ratio with decline, and then operationally also can be connected with the optical switch of the port number with increase.Based on the restructuring node of this design, can dynamically reconfigure annexation between optical transceiver and ODN according to load by changing the switching guide of optical switch.The PON also achieving a kind of logic thus reconfigures.
Fig. 4 a shows the configuration schematic diagram of the PON restructuring node for saving power according to an embodiment of the invention.In the embodiment of Fig. 4 a, via PON restructuring node, multiple ODN is reconfigured to identical OLT plate.
Such as when some traffic carrying capacity in multiple ODN is lower, the traffic carrying capacity of such as, ODN1, ODN i and ODN n in Fig. 2 is not high, then can reconfigure PON restructuring node, so that ODN1, ODN i and ODN n is concentrated to main OLT plate.Therefore, under the best circumstances, all ODN can be reconfigured to identical OLT plate.Thus, other OLT plate can be closed to save power.
Fig. 4 b shows the configuration schematic diagram of node of recombinating for the PON saving power according to another embodiment of the invention.In the embodiment of Fig. 4 a, via PON restructuring node, multiple ODN is reconfigured to identical optical receiver.
Such as when some traffic carrying capacity in multiple ODN reduces further, the traffic carrying capacity of such as, ODN1, ODN i and ODN n in Fig. 2 is not high, then the MAC module in a PON and optical receiver just can process all traffic carrying capacitys.Thereby, it is possible to reconfigure PON recombinate node, with by ODN1, ODN i with ODN n by identical optical transceiver service.Therefore, other optical transceiver can be closed to save power.
The present invention is based on PON restructuring node and can also realize dynamically resource-sharing and power saving.Describe in detail with reference to Fig. 5 a to Fig. 6 b.In Fig. 5 a to Fig. 6 b, only show each OLT plate with form briefly, its embodiment can be similar with the execution mode in Fig. 2.
In order to explain the operation principle of PON restructuring node, the access node with two blocks of OLT plates will be supposed hereinafter.Two blocks of OLT plates have 3 PON ports and 2 PON ports respectively.Therefore, use 5 optical splitters and 5 optical switches are needed.According to the load condition of ODN, PON restructuring node dynamically can reconfigure the connected mode of ODN and OLT plate and PON port, thus optionally can close some optical transceivers and OLT plate, to reduce power consumption.
A) the optical transceiver resource in same OLT plate is dynamically shared
Fig. 5 a shows the configuration schematic diagram of the PON restructuring node when ODN traffic carrying capacity is higher according to an embodiment of the invention.Show the annexation (representing present connection with heavy line) of each ODN and optical transceiver when all ODN traffic carrying capacitys higher (being also that each ODN is with normal larger load running) in fig 5 a.As shown in Figure 5, all optical switches are all in pass-through state, and also namely i-th optical splitter sets up corresponding connection with i-th optical switch.Thus, each ODN still establishes a communications link with original corresponding optical transceiver.In this case, optical transceiver is not had to be closed.
But when the traffic carrying capacity in ODN2 and ODN5 is lower, optical switch SW2 with SW5 that PON recombinates in node can be suitably configured to make corresponding ODN be connected with another optical transceiver in identical OLT plate.Fig. 5 b shows the configuration schematic diagram of the PON restructuring node when ODN traffic carrying capacity is lower according to an embodiment of the invention.As shown in Figure 5 b, after optical switch reconfigures, ODN1 and ODN2 can form a new logic PON and share optical transceiver 1, and ODN4 and ODN5 can form another new logic PON and share optical transceiver 4.Therefore, optical transceiver 2 and 4 can be closed to save power (represent cut out optical transceiver with cross in the drawings, and represent present connection with heavy line).
B) the optical transceiver resource in different OLT plate is dynamically shared
The PON restructuring node proposed can also be configured to the optical transceiver resource in different OLT plates is shared, and can close unnecessary OLT plate, can reduce power consumption thus.
Fig. 6 a shows the configuration schematic diagram of the restructuring of the PON when ODN traffic carrying capacity is lower node according to still another embodiment of the invention.As shown in Figure 6 a, when the traffic carrying capacity in ODN3, ODN4 and ODN5 is very low, optical switch SW3, SW4 and SW5 can be configured to make ODN3, ODN4 and ODN5 to form logic PON and to share optical transceiver 3.Thus, monoblock OLT plate 2 can both be closed to save power.Represent closedown optical transceiver with cross in the drawings, and represent present connection with heavy line.
Fig. 6 b shows the configuration schematic diagram of the restructuring of the PON when ODN traffic carrying capacity is lower node according to still another embodiment of the invention.Fig. 6 b shows a kind of best circumstance.If the traffic carrying capacity namely on all ODN is enough low, then all ODN (ODN1 to 5) can be reconfigured to main OLT plate 1 and share key light transceiver 1.Particularly, all ODN will share identical optical transceiver 1, and other OLT plate and optical transceiver 2 to 5 will be closed to save power.Represent closedown optical transceiver with cross in the drawings, and represent present connection with heavy line.At this, ODN1 to 5 defines logic PON.Preferably, treat the OLT plate of closedown and optical transceiver selection can in the olt in MAC layer by centralized control.
It should be noted that, above-described embodiment is only exemplary, but not limitation of the present invention.Any technical scheme not deviating from spirit of the present invention all should fall within protection scope of the present invention, and this comprises the different technologies feature that use occurs in different embodiments, and method can combine, to obtain beneficial effect.
Claims (10)
1. an EPON framework, it comprises:
EPON access node, it comprises m block optical line terminal plate, on described m block optical line terminal plate, be provided with R optical transceiver;
Multiple Optical Distribution Network; And
EPON restructuring node, it is for connecting described EPON access node and described multiple Optical Distribution Network;
Wherein, described EPON restructuring node is configured to the same optical transceiver in each optical transceiver of being dynamically connected to correspondingly by each Optical Distribution Network in described multiple Optical Distribution Network according to predetermined condition in R optical transceiver in described EPON access node or R the optical transceiver be connected to by least one Optical Distribution Network in described multiple Optical Distribution Network in described EPON access node.
2. EPON framework according to claim 1, is characterized in that, described EPON restructuring node comprises:
Spectral module, it is connected with a described R optical transceiver; And
Optical switch module, it is for connecting described multiple Optical Distribution Network and described spectral module;
Wherein, described optical switch module dynamically configures described spectral module according to described predetermined condition, with each optical transceiver be connected to correspondingly by each Optical Distribution Network in described multiple Optical Distribution Network in a described R optical transceiver or at least one Optical Distribution Network in described multiple Optical Distribution Network is connected to the same optical transceiver in a described R optical transceiver.
3. EPON framework according to claim 2, is characterized in that,
Described spectral module comprises R optical splitter, and each with the corresponding optical transceiver in a described R optical splitter connects;
Described optical switch module comprises R optical switch, each with corresponding Optical Distribution Network in a described R optical switch connects, wherein, a jth optical switch in a described R optical switch has j port, it is corresponding to a jth optical splitter with the 1st in a described R optical splitter respectively, wherein 1≤j≤R, R and j is positive integer;
Wherein, a described jth optical switch comes from corresponding described 1st to a jth optical splitter, dynamically select a jth optical splitter to a jth optical splitter, to select connected optical splitter with its connection or from corresponding described 1st according to described predetermined condition, is connected with the same optical transceiver in a described R optical transceiver with at least one Optical Distribution Network realized in described multiple Optical Distribution Network.
4. EPON framework according to claim 3, is characterized in that, the splitting ratio of the jth optical splitter in a described n optical splitter is 1: n-j+1.
5. EPON framework according to claim 1, is characterized in that, described predetermined condition comprises the load condition in network strategy and multiple Optical Distribution Network.
6. an EPON restructuring node, it is for connected with passive optical-fiber network access node and multiple Optical Distribution Network, wherein said EPON access node comprises m block optical line terminal plate, R optical transceiver is provided with on described m block optical line terminal plate, wherein, a described R optical transceiver and described EPON node of recombinating is connected, and wherein, described EPON restructuring node is configured to:
Dynamically each Optical Distribution Network in described multiple Optical Distribution Network is connected to correspondingly each optical transceiver in a described R optical transceiver according to predetermined condition or at least one Optical Distribution Network in described multiple Optical Distribution Network is connected to the same optical transceiver in a described R optical transceiver.
7. EPON restructuring node according to claim 6, is characterized in that, comprising:
Spectral module, it is connected with a described R optical transceiver; And
Optical switch module, it is for connecting described multiple Optical Distribution Network and described spectral module;
Wherein, described optical switch module dynamically configures described spectral module according to described predetermined condition, with each optical transceiver be connected to correspondingly by each Optical Distribution Network in described multiple Optical Distribution Network in a described R optical transceiver or at least one Optical Distribution Network in described multiple Optical Distribution Network is connected to the same optical transceiver in a described R optical transceiver.
8. EPON restructuring node according to claim 7, is characterized in that,
Described spectral module comprises R optical splitter, and each with the corresponding optical transceiver in a described R optical splitter connects;
Described optical switch module comprises R optical switch, each with corresponding Optical Distribution Network in a described R optical switch connects, wherein, a jth optical switch in a described R optical switch has j port, it is corresponding to a jth optical splitter with the 1st in a described R optical splitter respectively, wherein 1≤j≤R, R and j is positive integer;
Wherein, a described jth optical switch comes from corresponding described 1st to a jth optical splitter, dynamically select a jth optical splitter to a jth optical splitter, to select connected optical splitter with its connection or from corresponding described 1st according to described predetermined condition, is connected with the same optical transceiver in a described R optical transceiver with at least one Optical Distribution Network realized in described multiple Optical Distribution Network.
9. EPON restructuring node according to claim 8, it is characterized in that, the splitting ratio of the jth optical splitter in a described n optical splitter is 1: n-j+1.
10. EPON restructuring node according to claim 6, it is characterized in that, described predetermined condition comprises the load condition in network strategy and multiple Optical Distribution Network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410067675.8A CN104869479B (en) | 2014-02-26 | 2014-02-26 | A kind of passive optical network framework |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410067675.8A CN104869479B (en) | 2014-02-26 | 2014-02-26 | A kind of passive optical network framework |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104869479A true CN104869479A (en) | 2015-08-26 |
| CN104869479B CN104869479B (en) | 2019-03-01 |
Family
ID=53914914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410067675.8A Active CN104869479B (en) | 2014-02-26 | 2014-02-26 | A kind of passive optical network framework |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104869479B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108024161A (en) * | 2016-10-31 | 2018-05-11 | 中国电信股份有限公司 | Method and controller for scheduling of resource |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100098413A1 (en) * | 2008-10-21 | 2010-04-22 | Teknovus, Inc. | Performance monitoring in passive optical networks |
| EP2393237A1 (en) * | 2009-04-02 | 2011-12-07 | Huawei Technologies Co., Ltd. | Passive optical network protection method, master-standby switch control device and system |
| CN102439998A (en) * | 2011-10-25 | 2012-05-02 | 华为技术有限公司 | Passive optical network system and downlink transmission method thereof |
| CN102917286A (en) * | 2012-11-19 | 2013-02-06 | 烽火通信科技股份有限公司 | Hand-in-hand protection switching method and system in EPON (Ethernet Passive Optical Network) |
| CN103475411A (en) * | 2013-08-22 | 2013-12-25 | 南京邮电大学 | Time division passive optical network |
-
2014
- 2014-02-26 CN CN201410067675.8A patent/CN104869479B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100098413A1 (en) * | 2008-10-21 | 2010-04-22 | Teknovus, Inc. | Performance monitoring in passive optical networks |
| EP2393237A1 (en) * | 2009-04-02 | 2011-12-07 | Huawei Technologies Co., Ltd. | Passive optical network protection method, master-standby switch control device and system |
| CN102439998A (en) * | 2011-10-25 | 2012-05-02 | 华为技术有限公司 | Passive optical network system and downlink transmission method thereof |
| CN102917286A (en) * | 2012-11-19 | 2013-02-06 | 烽火通信科技股份有限公司 | Hand-in-hand protection switching method and system in EPON (Ethernet Passive Optical Network) |
| CN103475411A (en) * | 2013-08-22 | 2013-12-25 | 南京邮电大学 | Time division passive optical network |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108024161A (en) * | 2016-10-31 | 2018-05-11 | 中国电信股份有限公司 | Method and controller for scheduling of resource |
| CN108024161B (en) * | 2016-10-31 | 2020-10-09 | 中国电信股份有限公司 | Method and controller for resource scheduling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104869479B (en) | 2019-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104023282B (en) | Open network architecture based on wavelength division PON system, and signal transmission method | |
| US9654209B2 (en) | Low cost secure ROADM branching unit with redundancy protection | |
| EP2713529A1 (en) | Method for protection of multi-wavelength passive optical network | |
| Rumipamba-Zambrano et al. | Space continuity constraint in dynamic flex-grid/SDM optical core networks: an evaluation with spatial and spectral super-channels | |
| Stern | Linear lightwave networks: How far can they go? | |
| CN102480651A (en) | Multi-rate optical signal transmission method, multi-rate optical signal transmission system and optical network unit | |
| US8774628B2 (en) | Remote node and network architecture and data transmission method for a fiber-optic network, especially for low bit-rate data transmission | |
| CN103931209A (en) | Apparatus and method for providing protection in a passive optical network | |
| CN100495098C (en) | A reconfigurable optical switching system | |
| Fujii et al. | Dynamic spectrum and core allocation with spectrum region reducing costs of building modules in AoD nodes | |
| Cheng et al. | Reliable and cost efficient passive optical interconnects for data centers | |
| US20160301495A1 (en) | Power Efficient Multi-Degree ROADM Using Variable Optical Splitter | |
| Kabaciński et al. | Wide-sense nonblocking elastic optical switch | |
| Garg et al. | Energy efficient flexible hybrid wavelength division multiplexing-time division multiplexing passive optical network with pay as you grow deployment | |
| CN103916192A (en) | Optical network unit, optical line terminal group and optical network architecture | |
| US6731830B2 (en) | Asymmetric compatible network element | |
| US20030039003A1 (en) | Architectural arrangement for core optical networks | |
| CN104869479A (en) | Passive optical network architecture | |
| CN101459473B (en) | Optical beam splitter, optical beam combiner and point-to-multipoint network system | |
| WO2016115988A1 (en) | Optical cross-connect scheduling device, method and optical-electrical hybrid cross system | |
| CN104717577A (en) | Optical divider and annular passive optical network | |
| Nakagawa et al. | Photonic Sub-Lambda transport: An energy-efficient and reliable solution for metro networks | |
| Rizzelli et al. | Comparison of opaque and translucent WDM networks with different regenerator-placement strategies under static and dynamic traffic | |
| JP2019068198A (en) | Station side device and optical access network | |
| CN103384972A (en) | Signalling establishment method at the moment of placing electric relay in electric network elements, optical network elements and electric network elements |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 201206 Shanghai, Pudong Jinqiao Ning Bridge Road, No. 388, No. Applicant after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Shanghai, Pudong Jinqiao Ning Bridge Road, No. 388, No. Applicant before: Shanghai Alcatel-Lucent Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |