CN106470366B - Channel configuration method and device - Google Patents
Channel configuration method and device Download PDFInfo
- Publication number
- CN106470366B CN106470366B CN201510512336.0A CN201510512336A CN106470366B CN 106470366 B CN106470366 B CN 106470366B CN 201510512336 A CN201510512336 A CN 201510512336A CN 106470366 B CN106470366 B CN 106470366B
- Authority
- CN
- China
- Prior art keywords
- channel
- onu
- bundle
- time slot
- uplink
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Small-Scale Networks (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a channel configuration method, which comprises the following steps: an optical line terminal OLT acquires an uplink channel corresponding to each downlink channel; the OLT binds each downlink channel and the corresponding uplink channel thereof into a channel bundle, wherein the downlink channel in the channel bundle is bound with any uplink channel in the channel bundle to form a physical channel. The invention also discloses a channel configuration device. The uplink available bandwidth resources in the channel bundle are shared, the uplink dynamic bandwidth allocation is not influenced by the downlink channel, and the random switching can be carried out among the uplink channels, so that the situation that some physical channels are too busy and some physical channels are too idle in a PON network is avoided, and the waste of the bandwidth is avoided.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a channel configuration method and apparatus.
Background
With the development of Network technology, a large amount of services such as voice, data, video and the like can be transmitted by using a Network, so that the requirement for bandwidth is continuously increased, and a PON (Passive Optical Network) is generated under the requirement. The PON system generally includes an Optical Line Terminal OLT (Optical Line Terminal) on a central office side, an ONU (Optical Network Unit) on a subscriber side, and an ODN (Optical Distribution Network), and generally adopts a point-to-multipoint Network structure. The ODN is composed of a single-mode optical fiber, and passive optical devices such as an optical splitter and an optical connector, and provides an optical transmission medium for physical connection between the OLT and the ONU. In order to further increase the bandwidth of the network, a PON system that transmits multiple wavelengths in a trunk fiber and provides access by using a Time Division technique on each wavelength is called a TWDM (Time wavelength Division Multiplexing) PON system.
The topology structure of the TWDM PON system is shown in fig. 1, a plurality of TWDM CTs (channel termination) are provided in the TWDM PON OLT, each TWDM CT processes a pair of associated uplink and downlink wavelength channels (the uplink and downlink wavelength channels form a physical channel), and provides access and maintenance services for all ONUs operating in the physical channel. The uplink and downlink wavelength channels processed by different TWDM CTs are different, as shown in fig. 1, the downlink signal CH1d of the TWDM channel 1 and the uplink signal CH1u sent from the ONU work in pairs, and the other TWDM channels are similar, and each ONU has and only can selectively work in one TWDM channel. The TWDM PON system is strictly CT-bound, which is a simple and efficient working method, but is inflexible for some network applications, and the potential of the network is not sufficiently mined, for example, as shown in fig. 2, in a certain time period or under a certain configuration in the TWDM PON network, the bandwidths occupied by the downlink CH1d of the channel 1 and the downlink data queue of the downlink CH2d of the channel 2 reach a similar busy level, which is more than 90% of the bandwidth of each channel, the uplink of the channel 1 is in a particularly busy state, which is 120% of the full-load bandwidth of the channel, and the uplink of the channel 2 is in a completely idle state. At this time, some ONU data in the channel 1 is in a waiting state, and due to the limitation of TWDM PON CT binding, the upstream data in the channel 1 cannot be transmitted in the channel 2 in a fully idle state, and this upstream bandwidth is wasted at this time. For the same reason, when one channel is overloaded and the other channel is idle, the downlink bandwidth of the idle channel is also wasted. It can be seen that due to unbalanced channel load, in some special cases, a huge waste of TWDM PON network bandwidth resources may be caused.
Disclosure of Invention
The invention mainly aims to provide a channel configuration method and a channel configuration device, and aims to solve the technical problem of PON network bandwidth waste.
In order to achieve the above object, the present invention provides a channel configuration method, which includes the following steps:
an optical line terminal OLT acquires an uplink channel corresponding to each downlink channel;
the OLT binds each downlink channel and the corresponding uplink channel thereof into a channel bundle, wherein the downlink channel in the channel bundle is bound with any uplink channel in the channel bundle to form a physical channel.
Preferably, after the step of binding each downlink channel and its corresponding uplink channel to one channel bundle by the OLT, the channel configuration method further includes the steps of:
after registering an optical network unit ONU, the OLT acquires a channel bundle where the ONU is located;
and the OLT acquires a first bandwidth parameter of the channel bundle and allocates a second bandwidth parameter to the ONU according to the first bandwidth parameter.
Preferably, after the step of acquiring, by the OLT, a first bandwidth parameter of the channel bundle and allocating, according to the first bandwidth parameter, a second bandwidth parameter to the ONU, the channel configuration method further includes the step of:
the OLT acquires the second bandwidth parameters corresponding to each ONU in each channel bundle and queue information reported by each ONU;
the OLT allocates time slot parameters and physical channel information to the ONUs according to preset physical channel constraint conditions, second bandwidth parameters corresponding to the ONUs and queue information reported by the ONUs, wherein the time slot parameters comprise time slot IDs (identities), time slot lengths and time slot starting positions;
and the OLT sends each time slot parameter and the physical channel information to the corresponding ONU so that the ONU transmits data to the OLT based on the received physical channel information and the time slot parameter.
Preferably, the step of allocating, by the OLT, a time slot parameter and physical channel information to the ONUs according to a preset physical channel constraint condition, a second bandwidth parameter corresponding to each ONU, and queue information reported by each ONU includes:
the OLT allocates the time slot ID and the time slot length to each ONU according to the second bandwidth parameter corresponding to each ONU and the queue information reported by each ONU;
and the OLT allocates the time slot ID and the time slot length corresponding to each ONU in the channel bundle to the corresponding physical channel according to the physical channel constraint condition corresponding to each physical channel in the channel bundle, and sets the time slot starting position of each ONU in the corresponding physical channel.
Preferably, after the step of sending, by the OLT, each time slot parameter and physical channel information to a corresponding ONU, so that the ONU transmits data to the OLT based on the received physical channel information and the time slot parameter, the channel configuration method further includes the step of:
when receiving data uploaded by the ONU through a corresponding physical channel, the OLT acquires data of the same channel bundle;
and the OLT carries out convergence operation on the data of the same channel bundle so as to restore the data uploaded by each ONU.
In addition, to achieve the above object, the present invention further provides a channel configuration apparatus, including:
the acquisition module is used for acquiring uplink channels corresponding to the downlink channels;
and the binding module is used for binding each downlink channel and the corresponding uplink channel thereof into a channel bundle, wherein the downlink channel in the channel bundle is bound with any uplink channel in the channel bundle to form a physical channel.
Preferably, the obtaining module is further configured to obtain a channel bundle where an optical network unit ONU is located and a first bandwidth parameter of the channel bundle after registering the ONU; the channel configuration device further comprises an allocation module, configured to allocate a second bandwidth parameter to the ONU according to the first bandwidth parameter.
Preferably, the obtaining module is further configured to obtain the second bandwidth parameter corresponding to each ONU in each channel bundle and queue information reported by each ONU; the allocation module is further configured to allocate a time slot parameter and physical channel information to the ONUs according to a preset physical channel constraint condition, a second bandwidth parameter corresponding to each ONU, and queue information reported by each ONU, where the time slot parameter includes a time slot ID, a time slot length, and a time slot start position; the channel configuration device further comprises a sending module, configured to send each time slot parameter and physical channel information to a corresponding ONU, so that the ONU transmits data to the OLT based on the received physical channel information and the time slot parameter.
Preferably, the allocation module comprises:
an allocating unit, configured to allocate the timeslot ID and timeslot length to each ONU according to the second bandwidth parameter corresponding to each ONU and queue information reported by each ONU;
the allocation unit is further configured to allocate, according to the physical channel constraint condition corresponding to each physical channel in the channel bundle, a time slot ID and a time slot length corresponding to each ONU in the channel bundle to a corresponding physical channel;
and the setting unit is used for setting the starting position of the time slot of each ONU in the corresponding physical channel.
Preferably, the obtaining module is further configured to obtain data of the same channel bundle when receiving data uploaded by the ONU through a corresponding physical channel thereof; the channel configuration device further comprises a convergence module, which is used for performing convergence operation on the data of the same channel bundle so as to restore the data uploaded by each ONU.
According to the channel configuration method and device, an Optical Line Terminal (OLT) acquires uplink channels corresponding to downlink channels, and binds the downlink channels and the uplink channels corresponding to the downlink channels into a channel bundle, wherein the downlink channels in the channel bundle are bound with any uplink channel in the channel bundle to form a physical channel; meanwhile, in the scheme, because the downlink channel in one channel bundle and any uplink channel in the channel bundle can form a physical channel, when the channel is switched, only the uplink channel needs to be switched, namely only the uplink wavelength needs to be tuned, so that the channel switching efficiency of the PON network is high.
Drawings
Fig. 1 is a schematic diagram illustrating an uplink channel and a downlink channel configuration in the prior art;
FIG. 2 is a schematic diagram of network states of the channels in FIG. 1;
FIG. 3 is a flowchart illustrating a first embodiment of a channel allocation method according to the present invention;
FIG. 4 is a schematic view of a channel bundle of the present invention;
FIG. 5 is a flowchart illustrating a second embodiment of a channel allocation method according to the present invention;
FIG. 6 is a flowchart illustrating a channel allocation method according to a third embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a detailed process of allocating physical channels and timeslot parameters to ONUs according to the present invention;
fig. 8 is a schematic diagram of an ONU physical channel allocation process according to the present invention;
FIG. 9 is a diagram illustrating an OLT converging received data according to the present invention;
fig. 10 is a functional block diagram of a channel allocation apparatus according to a first embodiment of the present invention;
fig. 11 is a functional block diagram of a channel allocation apparatus according to a second embodiment of the present invention;
fig. 12 is a functional block diagram of a channel allocation apparatus according to a third embodiment of the present invention;
fig. 13 is a schematic diagram of a detailed functional module of an allocation module in a third embodiment of the channel allocation apparatus of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a channel configuration method.
Referring to fig. 3, fig. 3 is a flowchart illustrating a channel allocation method according to a first embodiment of the present invention.
The present embodiment provides a channel configuration method, where the channel configuration method includes:
step S10, the optical line terminal OLT acquires the uplink channel corresponding to each downlink channel;
in a general PON network, a channel in an optical line terminal is a TWDM channel, each TWDM channel is divided into an uplink channel and a downlink channel, and generally includes a plurality of uplink channels and downlink channels, where an uplink channel and a downlink channel form a physical channel, an OLT transmits data to an ONU through the downlink channel in the physical channel corresponding to the ONU, and the ONU transmits data to the OLT through the uplink channel in the physical channel where the ONU is located.
Step S20, the OLT binds each downstream channel and its corresponding upstream channel into a channel bundle, where the downstream channel in the channel bundle is bound with any upstream channel in the channel bundle to form a physical channel.
The binding of the uplink channel and the downlink channel can be realized by adding the same channel bundle identifier to the channels belonging to the same channel bundle, and the channel bundles to which the channels belong can be distinguished based on the channel bundle identifier. Each uplink channel and each downlink channel are provided with corresponding channel identifiers, and physical channels can be identified based on the combination of the uplink channel identifiers and the downlink channel identifiers.
It can be understood that each downlink channel may be bound to all uplink channels in the OLT as a channel bundle, or the downlink channel may also be bound to a part of the uplink channels in the OLT as a channel bundle, and how many bound uplink channels may be set by a user as needed, that is, when a channel bundle configuration instruction is received, the optical line terminal OLT obtains the number of the uplink channel corresponding to each downlink channel based on the channel bundle configuration instruction; the optical line terminal OLT binds each downlink channel with the uplink channel with the corresponding number; and the OLT binds each downlink channel with the uplink channel when the channel bundle configuration instruction fails to acquire the serial number of the uplink channel corresponding to each downlink channel.
In this embodiment, the preferred scheme is to bind each downlink channel with all uplink channels, so that bandwidth resources of all uplink channels are shared, and uplink dynamic bandwidth allocation is network-wide, so that uplink data transmission is more flexible.
Referring to fig. 4, a channel bundle is shown, where the channel bundle BCT1 is a channel bundle composed of a downlink channel of channel 1 and all uplink channels, where each uplink channel and a downlink channel of channel 1 form a physical channel Ch1j (j ═ 1,2 … n),1 is a downlink channel number, j denotes an uplink channel number, and n is an uplink channel number. Similarly, the channel bundle BCT2 is a channel bundle composed of the downlink channel of channel 2 and all uplink channels, where each uplink channel and the downlink channel of channel 2 form a physical channel Ch2j (j ═ 1,2 … n),2 is a downlink channel number, j denotes an uplink channel number, and n is an uplink channel number; the channel bundle BCTm is a channel bundle composed of a downlink channel of a channel m and all uplink channels, where each uplink channel and a downlink wavelength of a channel n form a physical channel Chmj (j ═ 1,2 … n), m is a downlink channel serial number, j denotes an uplink channel serial number, and n is an uplink channel number. The upstream channels in different channel bundles are partially or completely overlapped.
In the channel configuration method provided by this embodiment, an optical line terminal OLT acquires an uplink channel corresponding to each downlink channel, and binds each downlink channel and its corresponding uplink channel into a channel bundle, where a downlink channel in the channel bundle is bound with any uplink channel in the channel bundle to form a physical channel, after the channel bundle is bound, uplink available bandwidth resources within the channel bundle are shared, dynamic bandwidth allocation of uplink is not affected by the downlink channel, and arbitrary switching can be performed between the uplink channels, so that situations that some physical channels are too busy and some physical channels are too idle in a PON network are avoided, and thus bandwidth waste is avoided; meanwhile, in the scheme, because the downlink channel in one channel bundle and any uplink channel in the channel bundle can form a physical channel, when the channel is switched, only the uplink channel needs to be switched, namely only the uplink wavelength needs to be tuned, so that the channel switching efficiency of the PON network is high.
Further, in order to improve the accuracy of the channel configuration, a second embodiment of the channel configuration method according to the present invention is proposed based on the first embodiment, and in this embodiment, referring to fig. 5, in this embodiment, the step S20 includes the following steps:
step S30, after registering an optical network unit ONU, the OLT acquires a channel bundle where the ONU is located;
step S40, the OLT acquires a first bandwidth parameter of the channel bundle, and allocates a second bandwidth parameter to the ONU according to the first bandwidth parameter.
The first bandwidth parameter corresponding to each channel bundle may include an uplink bandwidth parameter and a downlink bandwidth parameter, where the uplink bandwidth parameter and the downlink bandwidth parameter preferably include an uplink bandwidth value and a downlink bandwidth value, for example, if the bandwidth parameter of a certain channel bundle is 10G/20G, the uplink bandwidth parameter of the channel bundle is 10G, and the downlink bandwidth parameter is 20G. The second bandwidth parameter comprises a guaranteed bandwidth and a maximum bandwidth, the sum of uplink guaranteed bandwidths of all the ONUs in the same channel bundle is smaller than the uplink bandwidth of the channel bundle, and the uplink maximum bandwidth of each ONU in the same channel bundle is smaller than the uplink bandwidth of the channel bundle.
When performing bandwidth configuration on each ONU, the priority of each ONU may be considered, and a bandwidth parameter may be allocated to each ONU according to the priority of each ONU, for example, the bandwidth ratio of each ONU may be configured according to the priority of each ONU, and a second bandwidth parameter corresponding to each ONU is calculated according to the bandwidth ratio corresponding to each ONU and the first bandwidth parameter of the channel bundle.
Further, in order to improve flexibility of communication, a third embodiment of the channel configuration method according to the present invention is proposed based on the second embodiment, in this embodiment, referring to fig. 6, in this embodiment, after step S40, the method includes the steps of:
step S50, the OLT acquires the second bandwidth parameter corresponding to each ONU in each channel bundle and queue information reported by each ONU;
step S60, the OLT allocates time slot parameters and physical channel information to the ONUs according to preset physical channel constraint conditions, second bandwidth parameters corresponding to the ONUs and queue information reported by the ONUs, wherein the time slot parameters comprise time slot IDs, time slot lengths and time slot starting positions;
in this embodiment, the request information may include a communication priority, which is not described herein again when the physical channel constraint condition is a physical channel constraint condition in a PON communication protocol, and the second bandwidth parameter corresponding to each ONU includes a guaranteed bandwidth and a maximum bandwidth.
Referring to fig. 7, the specific process of allocating a physical channel and a timeslot parameter to an ONU in step S60 includes:
step S61, the OLT allocates the timeslot ID and timeslot length to each ONU according to the second bandwidth parameter corresponding to each ONU and the queue information reported by each ONU;
step S62, the OLT allocates the timeslot ID and timeslot length corresponding to each ONU in the channel bundle to a corresponding physical channel according to the physical channel constraint condition corresponding to each physical channel in the channel bundle, and sets a timeslot start position of each ONU in the corresponding physical channel.
Each ONU can collect information to be sent and a buffer state, package the collected information to be sent and the buffer state into an uplink data frame through nonlinear coding, send the uplink data frame to the OLT in a specified time slot, extract queue information according to the uplink data frame after the OLT receives the uplink data frame, and calculate a time slot ID and a time slot length of the ONU according to the received queue information and a second bandwidth parameter corresponding to each ONU, wherein the time slot ID and the time slot length are the time slot ID and the time slot length of the next uplink data frame of the ONU.
Then, according to the actual bandwidth constraint condition of the physical channel, the time slot IDs virtually allocated to all channel bundles and the corresponding time slot lengths are arranged and combined, the time slot IDs and the corresponding time slot lengths are allocated to the specific physical channels in the channel bundles, and the initial positions of the time slots of the time slot IDs and the corresponding time slot lengths in the uplink frames of the corresponding physical channels are set.
Specifically referring to fig. 8, the TWDM PON DBA layer in the OLT allocates bandwidth to the entire system level, specifically, it allocates bandwidth to the lower layer of the channel bundle BCTi DBA (i ═ 1,2 …), and the channel bundle BCTi DBA agent allocates the ONU DBA request below it. Taking the TWDM PON 40G/40G downstream/upstream symmetric rate system as an example, the TWDM PON DBA agent gives 4 BCTi to the lower layer, the bandwidths allocated to the upstream and downstream are respectively 10G/30G,10G/5G, 10G/3G, 10G/2G, and the BCTi DBA agent allocates a time slot, i.e., an Alloc id, and a time slot length (length) of each Alloc to the ONU according to the priority of the ONU under the layer and the ONU DBA request, so as to guarantee the bandwidth and the system management bandwidth. These allocated bandwidths should not exceed the bandwidth values in the bandwidth parameters of their BCTi DBA, all the Alloc ids submitted by the BCTi DBA, and the slot length of each Alloc id will be given to the physical channel CH scheduler in the OLT, which takes care of the actual physical channel allocation. And according to the scheduling algorithm result of the physical channel CH scheduler, the ONU switches the physical channels, and the OLT sends the time slots on the physical channels to the ONU.
Step S70, the OLT sends each time slot parameter and physical channel information to a corresponding ONU, so that the ONU transmits data to the OLT based on the received physical channel information and the time slot parameter.
After receiving the physical channel information, the ONU determines the wavelength corresponding to the uplink channel according to the number corresponding to the physical channel in the physical signal information (preferably, the number includes the numbers of the uplink channel and the downlink channel, and the combination of the uplink channel number and the downlink channel number is the number of the physical channel), and the channel tuning module in the ONU tunes according to the wavelength information, so that the wavelength of the uplink data frame conforms to the uplink channel.
It can be understood that, each time the OLT performs downlink data frame transmission, the OLT sends the timeslot parameters and the physical channel information of each ONU to the corresponding ONU.
Further, in order to improve the efficiency and accuracy of data transmission, a fourth embodiment of the channel configuration method according to the present invention is proposed based on the third embodiment, in this embodiment, after step S70, the method includes:
when receiving data uploaded by the ONU through a corresponding physical channel, the OLT acquires data of the same channel bundle;
and the OLT carries out convergence operation on the data of the same channel bundle so as to restore the data uploaded by each ONU.
When each uplink data frame is sent by the ONU, the physical channel needs to be switched, and then the data needs to be converged at the OLT, where the convergence operation refers to recombining each data frame sent by the same ONU in the same channel bundle according to the sending point or the number of the data frame, that is, the uplink data frame sent by each ONU carries the number of each ONU, and the OLT performs the convergence operation on the data of the same ONU according to the number of each ONU. Referring to fig. 9, all TWDM channels in all ith channel bundles BCTi converge to a virtual BCTi channel bundle port, which is an entity externally connected to the TWDM PON multi-channel system. The data of different channel bundle identifications pass through an actual TWDM PON physical channel and then are distinguished through a BCT identification filter, and the data of the same BCTi channel bundle identification are converged at a corresponding BCTi channel bundle port.
The invention further provides a channel allocation device.
Referring to fig. 10, fig. 10 is a functional block diagram of a channel allocating apparatus according to a first embodiment of the present invention.
It should be emphasized that the functional block diagram of fig. 10 is merely an exemplary diagram of a preferred embodiment, and those skilled in the art can easily add new functional blocks around the functional blocks of the channel allocating apparatus shown in fig. 10; the names of the functional modules are self-defined names, which are only used for assisting in understanding the program functional blocks of the channel allocation device, and are not used for limiting the technical scheme of the present invention.
This embodiment proposes a channel allocation apparatus, which includes:
an obtaining module 10, configured to obtain an uplink channel corresponding to each downlink channel;
in a general PON network, a channel in an optical line terminal is a TWDM channel, each TWDM channel is divided into an uplink channel and a downlink channel, and generally includes a plurality of uplink channels and downlink channels, where an uplink channel and a downlink channel form a physical channel, an OLT transmits data to an ONU through the downlink channel in the physical channel corresponding to the ONU, and the ONU transmits data to the OLT through the uplink channel in the physical channel where the ONU is located.
A binding module 20, configured to bind each downlink channel and its corresponding uplink channel into a channel bundle, where a downlink channel in the channel bundle is bound with any uplink channel in the channel bundle to form a physical channel.
The binding of the uplink channel and the downlink channel can be realized by adding the same channel bundle identifier to the channels belonging to the same channel bundle, and the channel bundles to which the channels belong can be distinguished based on the channel bundle identifier. Each uplink channel and each downlink channel are provided with corresponding channel identifiers, and physical channels can be identified based on the combination of the uplink channel identifiers and the downlink channel identifiers.
It can be understood that each downlink channel may be bound to all uplink channels in the OLT as a channel bundle, or the downlink channel may also be bound to a part of the uplink channels in the OLT as a channel bundle, and how many bound uplink channels may be set by a user as needed, that is, when a channel bundle configuration instruction is received, the optical line terminal OLT obtains the number of the uplink channel corresponding to each downlink channel based on the channel bundle configuration instruction; the optical line terminal OLT binds each downlink channel with the uplink channel with the corresponding number; and the OLT binds each downlink channel with the uplink channel when the channel bundle configuration instruction fails to acquire the serial number of the uplink channel corresponding to each downlink channel.
In this embodiment, the preferred scheme is to bind each downlink channel with all uplink channels, so that bandwidth resources of all uplink channels are shared, and uplink dynamic bandwidth allocation is network-wide, so that uplink data transmission is more flexible.
Referring to fig. 4, a channel bundle is shown, where the channel bundle BCT1 is a channel bundle composed of a downlink channel of channel 1 and all uplink channels, where each uplink channel and a downlink channel of channel 1 form a physical channel Ch1j (j ═ 1,2 … n),1 is a downlink channel number, j denotes an uplink channel number, and n is an uplink channel number. Similarly, the channel bundle BCT2 is a channel bundle composed of the downlink channel of channel 2 and all uplink channels, where each uplink channel and the downlink channel of channel 2 form a physical channel Ch2j (j ═ 1,2 … n),2 is a downlink channel number, j denotes an uplink channel number, and n is an uplink channel number; the channel bundle BCTm is a channel bundle composed of a downlink channel of a channel m and all uplink channels, where each uplink channel and a downlink wavelength of a channel n form a physical channel Chmj (j ═ 1,2 … n), m is a downlink channel serial number, j denotes an uplink channel serial number, and n is an uplink channel number. The upstream channels in different channel bundles are partially or completely overlapped.
In the channel configuration device provided in this embodiment, the optical line terminal OLT acquires an uplink channel corresponding to each downlink channel, and binds each downlink channel and its corresponding uplink channel into a channel bundle, where a downlink channel in the channel bundle is bound with any uplink channel in the channel bundle to form a physical channel, after the channel bundle is bound, uplink available bandwidth resources within the channel bundle are shared, and uplink dynamic bandwidth allocation is not affected by the downlink channel, and can be switched arbitrarily between the uplink channels, so as to avoid situations that some physical channels are too busy and some physical channels are too idle in the PON network, thereby avoiding waste of bandwidth; meanwhile, in the scheme, because the downlink channel in one channel bundle and any uplink channel in the channel bundle can form a physical channel, when the channel is switched, only the uplink channel needs to be switched, namely only the uplink wavelength needs to be tuned, so that the channel switching efficiency of the PON network is high.
Further, in order to improve accuracy of channel configuration, a second embodiment of the channel configuration device according to the present invention is provided based on the first embodiment, in this embodiment, referring to fig. 11, in this embodiment, the obtaining module 10 is further configured to obtain a channel bundle where an optical network unit ONU is located and a first bandwidth parameter of the channel bundle after registering the ONU; the channel configuration apparatus further includes an allocating module 30, configured to allocate a second bandwidth parameter to the ONU according to the first bandwidth parameter.
The first bandwidth parameter corresponding to each channel bundle may include an uplink bandwidth parameter and a downlink bandwidth parameter, where the uplink bandwidth parameter and the downlink bandwidth parameter preferably include an uplink bandwidth value and a downlink bandwidth value, for example, if the bandwidth parameter of a certain channel bundle is 10G/20G, the uplink bandwidth parameter of the channel bundle is 10G, and the downlink bandwidth parameter is 20G. The second bandwidth parameter comprises a guaranteed bandwidth and a maximum bandwidth, the sum of uplink guaranteed bandwidths of all the ONUs in the same channel bundle is smaller than the uplink bandwidth of the channel bundle, and the uplink maximum bandwidth of each ONU in the same channel bundle is smaller than the uplink bandwidth of the channel bundle.
When performing bandwidth configuration on each ONU, the priority of each ONU may be considered, and a bandwidth parameter may be allocated to each ONU according to the priority of each ONU, for example, the bandwidth ratio of each ONU may be configured according to the priority of each ONU, and a second bandwidth parameter corresponding to each ONU is calculated according to the bandwidth ratio corresponding to each ONU and the first bandwidth parameter of the channel bundle.
Further, in order to improve flexibility of communication, a third embodiment of the channel configuration method according to the present invention is provided based on the second embodiment, and referring to fig. 12 in this embodiment, the obtaining module 10 is further configured to obtain the second bandwidth parameters corresponding to each ONU in each channel bundle and queue information reported by each ONU; the allocating module 30 is further configured to allocate a time slot parameter and physical channel information to the ONUs according to a preset physical channel constraint condition, a second bandwidth parameter corresponding to each ONU, and queue information reported by each ONU, where the time slot parameter includes a time slot ID, a time slot length, and a time slot start position; the channel configuration device further includes a sending module 40, configured to send each time slot parameter and physical channel information to a corresponding ONU, so that the ONU transmits data to the OLT based on the received physical channel information and the time slot parameter.
In this embodiment, the request information may include a communication priority, which is not described herein again when the physical channel constraint condition is a physical channel constraint condition in a PON communication protocol, and the second bandwidth parameter corresponding to each ONU includes a guaranteed bandwidth and a maximum bandwidth.
Referring to fig. 13, the distribution module 30 includes:
an allocating unit 31, configured to allocate the timeslot ID and timeslot length to each ONU according to the second bandwidth parameter corresponding to each ONU and the queue information reported by each ONU;
the allocating unit 31 is further configured to allocate, according to the physical channel constraint condition corresponding to each physical channel in the channel bundle, a time slot ID and a time slot length corresponding to each ONU in the channel bundle to a corresponding physical channel;
a setting unit 32, configured to set a starting position of a timeslot of each ONU in the corresponding physical channel.
Each ONU can collect information to be sent and a buffer state, package the collected information to be sent and the buffer state into an uplink data frame through nonlinear coding, send the uplink data frame to the OLT in a specified time slot, extract queue information according to the uplink data frame after the OLT receives the uplink data frame, and calculate a time slot ID and a time slot length of the ONU according to the received queue information and a second bandwidth parameter corresponding to each ONU, wherein the time slot ID and the time slot length are the time slot ID and the time slot length of the next uplink data frame of the ONU.
Then, according to the actual bandwidth constraint condition of the physical channel, the time slot IDs virtually allocated to all channel bundles and the corresponding time slot lengths are arranged and combined, the time slot IDs and the corresponding time slot lengths are allocated to the specific physical channels in the channel bundles, and the initial positions of the time slots of the time slot IDs and the corresponding time slot lengths in the uplink frames of the corresponding physical channels are set.
Specifically referring to fig. 8, the TWDM PON DBA layer in the OLT allocates bandwidth to the entire system level, specifically, it allocates bandwidth to the lower layer of the channel bundle BCTi DBA (i ═ 1,2 …), and the channel bundle BCTi DBA agent allocates the ONU DBA request below it. Taking the TWDM PON 40G/40G downstream/upstream symmetric rate system as an example, the TWDM PON DBA agent gives 4 BCTi to the lower layer, the bandwidths allocated to the upstream and downstream are respectively 10G/30G,10G/5G, 10G/3G, 10G/2G, and the BCTi DBA agent allocates a time slot, i.e., an Alloc id, and a time slot length (length) of each Alloc id to the ONU according to the priority of the ONU under the layer and the ONU DBA request, so as to guarantee the bandwidth and the system management bandwidth. These allocated bandwidths should not exceed the bandwidth values in the bandwidth parameters of their BCTi DBA, all the Alloc ids submitted by the BCTi DBA, and the slot length of each Alloc id will be given to the physical channel CH scheduler in the OLT, which takes care of the actual physical channel allocation. And according to the scheduling algorithm result of the physical channel CH scheduler, the ONU switches the physical channels, and the OLT sends the time slots on the physical channels to the ONU.
After receiving the physical channel information, the ONU determines the wavelength corresponding to the uplink channel according to the number corresponding to the physical channel in the physical signal information (preferably, the number includes the numbers of the uplink channel and the downlink channel, and the combination of the uplink channel number and the downlink channel number is the number of the physical channel).
It can be understood that, each time the OLT performs downlink data frame transmission, the OLT sends the timeslot parameters and the physical channel information of each ONU to the corresponding ONU.
Further, in order to improve the efficiency and accuracy of data transmission, a fourth embodiment of the channel configuration device according to the present invention is provided based on the third embodiment, in this embodiment, the obtaining module 10 is further configured to obtain data of the same channel bundle when receiving data uploaded by the ONU through the corresponding physical channel; the channel configuration device further comprises a convergence module, which is used for performing convergence operation on the data of the same channel bundle so as to restore the data uploaded by each ONU.
The method comprises the steps that when each ONU sends each uplink data frame, a physical channel needs to be switched, data aggregation operation needs to be carried out on an OLT end, the aggregation operation carried out by an aggregation module refers to the fact that all data frames sent by the same ONU in the same channel beam are recombined according to sending points or numbers of the data frames, namely the uplink data frames sent by all the ONUs carry the numbers of all the ONUs, and the aggregation module carries out aggregation operation on the data of the same ONU according to the numbers of all the ONUs. Referring to fig. 9, all TWDM channels in all ith channel bundles BCTi converge to a virtual BCTi channel bundle port, which is an entity externally connected to the TWDM PON multi-channel system. The data of different channel bundle identifications pass through an actual TWDM PON physical channel and then are distinguished through a BCT identification filter, and the data of the same BCTi channel bundle identification are converged at a corresponding BCTi channel bundle port.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A channel configuration method, characterized in that the channel configuration method comprises the steps of:
an optical line terminal OLT acquires an uplink channel corresponding to each downlink channel;
the OLT binds each downlink channel and the corresponding uplink channel thereof into a channel bundle, wherein the downlink channel in the channel bundle is bound with any uplink channel in the channel bundle to form a physical channel;
after the step of binding each downlink channel and its corresponding uplink channel into a channel bundle by the OLT, the channel configuration method further includes the steps of:
after registering an optical network unit ONU, the OLT acquires a channel bundle where the ONU is located;
the OLT acquires a first bandwidth parameter of the channel bundle and allocates a second bandwidth parameter to the ONU according to the first bandwidth parameter;
after the step of acquiring, by the OLT, a first bandwidth parameter of the channel bundle and allocating, according to the first bandwidth parameter, a second bandwidth parameter to the ONU, the channel configuration method further includes the steps of:
the OLT acquires the second bandwidth parameters corresponding to each ONU in each channel bundle and queue information reported by each ONU;
the OLT allocates time slot parameters and physical channel information to the ONUs according to preset physical channel constraint conditions, the second bandwidth parameters corresponding to the ONUs and queue information reported by the ONUs, wherein the time slot parameters comprise time slot IDs (identities), time slot lengths and time slot starting positions;
and the OLT sends each time slot parameter and the physical channel information to the corresponding ONU so that the ONU transmits data to the OLT based on the received physical channel information and the time slot parameter.
2. The channel configuration method according to claim 1, wherein the step of the OLT allocating a timeslot parameter and physical channel information to the ONUs according to a preset physical channel constraint condition, the second bandwidth parameter corresponding to each ONU, and the queue information reported by each ONU comprises:
the OLT allocates the time slot ID and the time slot length to each ONU according to the second bandwidth parameter corresponding to each ONU and the queue information reported by each ONU;
and the OLT allocates the time slot ID and the time slot length corresponding to each ONU in the channel bundle to the corresponding physical channel according to the physical channel constraint condition corresponding to each physical channel in the channel bundle, and sets the time slot starting position of each ONU in the corresponding physical channel.
3. The channel configuration method according to claim 1, wherein the OLT sends each time slot parameter and physical channel information to a corresponding ONU for the ONU to transmit data to the OLT based on the received physical channel information and the time slot parameter, and the channel configuration method further comprises the steps of:
when receiving data uploaded by the ONU through a corresponding physical channel, the OLT acquires data of the same channel bundle;
and the OLT carries out convergence operation on the data of the same channel bundle so as to restore the data uploaded by each ONU.
4. A channel configuration apparatus, wherein the channel configuration apparatus comprises:
the acquisition module is used for acquiring uplink channels corresponding to the downlink channels;
the binding module is used for binding each downlink channel and the corresponding uplink channel thereof into a channel bundle, wherein the downlink channel in the channel bundle is bound with any uplink channel in the channel bundle to form a physical channel;
the acquisition module is further configured to acquire a channel bundle where an Optical Network Unit (ONU) is located and a first bandwidth parameter of the channel bundle after the ONU is registered; the channel configuration device further comprises an allocation module, configured to allocate a second bandwidth parameter to the ONU according to the first bandwidth parameter;
the acquiring module is further configured to acquire the second bandwidth parameter corresponding to each ONU in each channel bundle and queue information reported by each ONU; the allocation module is further configured to allocate a time slot parameter and physical channel information to the ONUs according to a preset physical channel constraint condition, the second bandwidth parameter corresponding to each ONU, and the queue information reported by each ONU, where the time slot parameter includes a time slot ID, a time slot length, and a time slot start position; the channel configuration device further comprises a sending module, configured to send each time slot parameter and physical channel information to a corresponding ONU, so that the ONU transmits data to the OLT based on the received physical channel information and the time slot parameter.
5. The channel configuring apparatus of claim 4, wherein the allocating module comprises:
an allocating unit, configured to allocate the timeslot ID and timeslot length to each ONU according to the second bandwidth parameter corresponding to each ONU and queue information reported by each ONU;
the allocation unit is further configured to allocate, according to the physical channel constraint condition corresponding to each physical channel in the channel bundle, a time slot ID and a time slot length corresponding to each ONU in the channel bundle to a corresponding physical channel;
and the setting unit is used for setting the starting position of the time slot of each ONU in the corresponding physical channel.
6. The channel configuration device according to claim 4, wherein the obtaining module is further configured to obtain data of the same channel bundle when receiving the data uploaded by the ONU through its corresponding physical channel; the channel configuration device further comprises a convergence module, which is used for performing convergence operation on the data of the same channel bundle so as to restore the data uploaded by each ONU.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510512336.0A CN106470366B (en) | 2015-08-19 | 2015-08-19 | Channel configuration method and device |
| PCT/CN2016/087296 WO2017028623A1 (en) | 2015-08-19 | 2016-06-27 | Method and device for channel configuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510512336.0A CN106470366B (en) | 2015-08-19 | 2015-08-19 | Channel configuration method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106470366A CN106470366A (en) | 2017-03-01 |
| CN106470366B true CN106470366B (en) | 2020-10-16 |
Family
ID=58050693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510512336.0A Active CN106470366B (en) | 2015-08-19 | 2015-08-19 | Channel configuration method and device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106470366B (en) |
| WO (1) | WO2017028623A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112738659B (en) * | 2019-10-28 | 2022-06-14 | 华为技术有限公司 | Communication method based on passive optical network, related equipment and system |
| CN116209071A (en) * | 2021-11-30 | 2023-06-02 | 华为技术有限公司 | Communication method, device and system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401632A (en) * | 2013-07-16 | 2013-11-20 | 北京邮电大学 | Large request first-fair excess allocation dynamic wave length bandwidth allocation method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060013138A1 (en) * | 2003-05-21 | 2006-01-19 | Onn Haran | Method and apparatus for dynamic bandwidth allocation in an ethernet passive optical network |
| CN101242434A (en) * | 2007-02-07 | 2008-08-13 | 杭州华三通信技术有限公司 | A data transmission method and its transmission device in coaxial network |
| CN102131130B (en) * | 2010-09-13 | 2013-12-04 | 华为技术有限公司 | Signal processing method, signal processing device and signal processing system for passive optical network (PON) |
| EP2731287A4 (en) * | 2012-05-23 | 2014-12-31 | Huawei Tech Co Ltd | Method, system and device for switching wavelength of multi-wavelength passive optical network (pon) |
| CN102882801B (en) * | 2012-09-28 | 2015-06-10 | 武汉长光科技有限公司 | Automatic wavelength tuning method and automatic wavelength tuning system based on TWDM-PON (time wavelength division multiplexing-passive optical network) |
| JP6078163B2 (en) * | 2013-10-25 | 2017-02-08 | 日本電信電話株式会社 | Protection method and optical communication system |
| CN104837077B (en) * | 2014-02-12 | 2019-05-07 | 中兴通讯股份有限公司 | Optical line terminal/optical network unit wavelength tuning method and device |
-
2015
- 2015-08-19 CN CN201510512336.0A patent/CN106470366B/en active Active
-
2016
- 2016-06-27 WO PCT/CN2016/087296 patent/WO2017028623A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401632A (en) * | 2013-07-16 | 2013-11-20 | 北京邮电大学 | Large request first-fair excess allocation dynamic wave length bandwidth allocation method |
Non-Patent Citations (2)
| Title |
|---|
| ITU-T.Multiple-wavelength passive optical networks (MW-PONs).《ITU-T G.9802》.2015, * |
| Multiple-wavelength passive optical networks (MW-PONs);ITU-T;《ITU-T G.9802》;20150430;第1-28页及图6-8 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017028623A1 (en) | 2017-02-23 |
| CN106470366A (en) | 2017-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100415584B1 (en) | Dynamic bw allocation method in atm passive optical network | |
| KR101310906B1 (en) | Apparatus and method for assigning dynamic bandwidth | |
| CN113365163B (en) | Bandwidth allocation method, optical line terminal, optical network unit and system | |
| WO2014094643A1 (en) | Round trip time aware dynamic bandwidth allocation for ethernet passive optical network over coaxial network | |
| JP6590017B2 (en) | Station side device and station side device control program | |
| US11695478B2 (en) | Apparatuses, methods, and computer programs for a remote unit and a central unit of an optical line terminal | |
| CN111654765A (en) | Business service processing method and device and optical line terminal | |
| EP3537673B1 (en) | Data sending and receiving method and device, onu, and olt | |
| CN108540221B (en) | Data sending method and device | |
| WO2009000194A1 (en) | Bandwidth allocation method, system and apparatus in optical network | |
| Wang et al. | Optimal wavelength scheduling for hybrid WDM/TDM passive optical networks | |
| CN106470366B (en) | Channel configuration method and device | |
| JP5725226B1 (en) | Dynamic wavelength allocation control method and station side apparatus | |
| CN105610724B (en) | When WDM passive optical network system in realize load balancing method and device | |
| CN103973597B (en) | The management method and system of resource in a kind of Opto-electronic system | |
| CN115701138A (en) | Method, device and system for processing cascade ONT | |
| CN112087678B (en) | Bandwidth allocation and bandwidth checking method and device | |
| KR20070033716A (en) | How to provide bandwidth control on-demand dedicated line service in MSP and ASON network | |
| JP2015033051A (en) | Dynamic band allocation method, station-side device, computer program and pon system | |
| Ganesan et al. | Resource allocation for tactile internet via software-defined FiWi access network | |
| JP5815478B2 (en) | Bandwidth allocation method and communication apparatus | |
| CN102075825A (en) | Uplink bandwidth management method and device in optical communication system | |
| CN102217328A (en) | Omci message transmission method, device and passive optical network | |
| Hadjiantonis et al. | A novel decentralized Ethernet passive optical network architecture | |
| JP6863426B2 (en) | Resource allocation device, resource allocation program, resource allocation method, and station side device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200911 Address after: Yuhuatai District of Nanjing City, Jiangsu province 210012 Bauhinia Road No. 68 Applicant after: Nanjing Zhongxing New Software Co.,Ltd. Address before: 518057 Nanshan District Guangdong high tech Industrial Park, South Road, science and technology, ZTE building, Ministry of Justice Applicant before: ZTE Corp. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |