CN103534981B

CN103534981B - Dynamic bandwidth allocation method, apparatus and system

Info

Publication number: CN103534981B
Application number: CN201380000226.5A
Authority: CN
Inventors: 孙方林; 张利
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-03-15
Filing date: 2013-03-15
Publication date: 2017-04-19
Anticipated expiration: 2033-03-15
Also published as: WO2014139172A1; CN103534981A

Abstract

The present invention provides a dynamic bandwidth allocation methods, devices and systems. The present invention is involved in the field of communication technology. Solved due to the presence of unpredictable delay the processing and transmission delay between CNU and MC, therefore CNU GATE message exists in the corresponding domain authorization window with a coaxial optical domain authorization window deviation or jitter, reduce system performance issues. Specific steps include: media converter receives CNU CNU data messages sent, CNU data send authorization request message includes the CNU, CNU sends an authorization request for bandwidth requests the CNU; send CNU send data to the OLT according to authorize media converter Message to the OLT sends a request under authorization of the CNU CNU bandwidth resource allocation, send authorization media converter include: OLT bandwidth resources allocated for the media converter. Dynamic bandwidth allocation may be applied.

Description

Method, device and system for dynamic bandwidth allocation

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for dynamic bandwidth allocation.

Background

In an EPOC (Ethernet Passive Optical network Protocol overlay Coax) system, an OLT (Optical Line Terminal) manages a CNU (coaxial network Unit), the OLT needs to schedule, i.e., allocate resources, and after allocating the resources, the OLT and the CNU perform data transmission.

The method for the OLT to schedule the CNUs comprises the following steps:

after receiving the REPORT message sent by the CNU, the OLT allocates resources to the CNU according to the REPORT message and notifies the CNU through a GATE message (gating message), so that the CNU uses the allocated resources to perform data transmission with the OLT. Specifically, the OLT sends a GATE message to the CNU through an MC (Media Converter), and the OLT also receives a REPORT message sent by the CNU through the MC. Wherein the REPORT message is a request for sending authorization and the GATE message is a sending authorization.

If the GATE message is sent to the CNU, the Grant (Grant start time, Grant time length, or Grant window) in the GATE message will be valid in the optical domain upstream from the MC. Because unpredictable processing delay and transmission delay exist between the CNU and the MC, there is deviation or jitter between the authorization window of the coaxial domain and the authorization window of the optical domain in the GATE message corresponding to the CNU, and it is very difficult to synchronize the two time domains of the optical domain and the coaxial domain.

Disclosure of Invention

Embodiments of the present invention provide a method, an apparatus, and a system for dynamic bandwidth allocation, which solve the problem that due to unpredictable processing delay and transmission delay between a CNU and an MC, a GATE message corresponding to the CNU has deviation or jitter between an authorization window of a coaxial domain and an authorization window of an optical domain, thereby reducing the performance of the system.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, a method for dynamic bandwidth allocation is provided, including:

a media converter receives a CNU data message sent by a CNU, wherein the CNU data message comprises a sending authorization request of the CNU, and the sending authorization request of the CNU is used for requesting bandwidth resources of the CNU;

sending the CNU data message to an OLT according to the sending authorization of the media converter so that the OLT performs bandwidth resource allocation on the CNU according to the sending authorization request of the CNU, wherein the sending authorization of the media converter comprises: and the OLT allocates bandwidth resources for the media converter.

In a first possible implementation manner of the first aspect, before the sending, to the OLT, the CNU data message according to a sending authorization of the media converter, the method further includes:

judging whether the format of the CNU data message is allowed to be transmitted in an optical domain;

and if not, converting the format of the CNU data message, so that the CNU data message after the format conversion can be sent to the OLT.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, before the sending, to the OLT, the CNU data message according to a sending authorization of a media converter, the method further includes:

sending a sending authorization request of a media converter to the OLT, wherein the sending authorization request of the media converter is used for requesting bandwidth resources of the media converter, so that the OLT allocates the bandwidth resources for the media converter according to the sending authorization request of the media converter.

And receiving a sending authorization of the media converter sent by the OLT.

With reference to the first aspect or the first possible implementation manner or the second possible implementation manner of the first aspect, in a third possible implementation manner, after sending the CNU data message to the OLT according to the sending authorization of the media converter, the method further includes:

receiving a sending authorization of a CNU sent by the OLT, wherein the sending authorization of the CNU comprises: and the OLT allocates bandwidth resources for the CNU.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, after the receiving a sending authorization of a CNU sent by the OLT, the method further includes:

judging whether the format of the sending authorization of the CNU is allowed to be transmitted in the coaxial domain;

if not, format conversion is carried out on the sending authorization of the CNU, so that the sending authorization of the CNU after format conversion can be sent to the CNU;

and sending the sending authorization of the CNU after the format conversion to the CNU.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the CNU data message includes: a logical link label LLID of a CNU requesting a bandwidth resource;

the sending authorization requests of the media converter are respectively used for requesting bandwidth resources of different LLIDs; or,

the media converter sending authorization request is used for requesting bandwidth resources according to the required total bandwidth resources, and the total bandwidth resources include: the sum of the bandwidth resources requested by all LLIDs, and the bandwidth resources requested by the media converter itself.

In a second aspect, another method for dynamic bandwidth allocation is provided, including:

an OLT receives a CNU data message sent by a media converter, wherein the CNU data message is sent to the OLT by the media converter according to the sending authorization of the media converter, and the CNU data message comprises: a CNU sends an authorization request, wherein the CNU sends the authorization request to request bandwidth resources of the CNU, and the sending authorization of the media converter comprises: the OLT allocates bandwidth resources for the media converter;

according to the sending authorization request of the CNU, bandwidth resource allocation is carried out on the CNU;

sending a sending authorization of a CNU to the media converter so that the media converter sends the sending authorization of the CNU to the CNU, wherein the sending authorization of the CNU comprises bandwidth resources allocated to the CNU by the OLT.

In a first possible implementation manner of the second aspect, before the sending authorization of the CNU to the media converter, the method further includes:

receiving a transmission authorization request of the media converter sent by the media converter, wherein the transmission authorization request of the media converter is used for requesting bandwidth resources of the media converter;

allocating bandwidth resources to the media converter according to the transmission authorization request of the media converter;

transmitting a transmission authorization of the media converter to the media converter.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the CNU data message further includes: service and management data, and CNU data messages may be identified by LLID (logical link identification), and one CNU may be assigned at least one LLID.

With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner, the CNU data message includes: a logical link label LLID of a CNU requesting a bandwidth resource;

the allocating bandwidth resources to the media converter according to the request for sending authorization of the media converter comprises:

respectively requesting bandwidth resources according to the broadband resources with different LLID requirements; or,

requesting bandwidth resources according to a required total bandwidth resource, wherein the total bandwidth resource comprises: the sum of the bandwidth resources requested by all LLIDs, and the bandwidth resources requested by the media converter itself.

In a third aspect, an apparatus for dynamic bandwidth allocation is provided, including:

a first receiving unit, configured to receive a CNU data message sent by a CNU, where the CNU data message includes a sending authorization request of the CNU, and the sending authorization request of the CNU is used to request a bandwidth resource of the CNU;

a first sending unit, configured to send, to an OLT according to a sending authorization of a media converter, the CNU data message, so that the OLT performs bandwidth resource allocation on the CNU according to a sending authorization request of the CNU, where the sending authorization of the media converter includes: and the OLT allocates bandwidth resources for the media converter.

In a fourth aspect, another apparatus for dynamic bandwidth allocation is provided, comprising:

a first receiving unit, configured to receive a CNU data message sent by a media converter, where the CNU data message is sent by the media converter to the OLT according to a sending authorization of the media converter, and the CNU data message includes: a CNU sends an authorization request, wherein the CNU sends the authorization request to request bandwidth resources of the CNU, and the sending authorization of the media converter comprises: the OLT allocates bandwidth resources for the media converter;

the allocation unit is used for allocating bandwidth resources to the CNU according to the sending authorization request of the CNU;

a first sending unit, configured to send a sending authorization of a CNU to the media converter, so that the media converter sends the sending authorization of the CNU to the CNU, where the sending authorization of the CNU includes a bandwidth resource allocated to the CNU by the OLT.

In a fifth aspect, there is provided a media converter comprising:

a receiver, configured to receive a CNU data message sent by a CNU, where the CNU data message includes a sending authorization request of the CNU, and the sending authorization request of the CNU is used to request a bandwidth resource of the CNU;

a transmitter, configured to send the CNU data message to an OLT according to the sending authorization of the media converter, so that the OLT performs bandwidth resource allocation on the CNU according to the sending authorization request of the CNU, where the sending authorization of the media converter includes: and the OLT allocates bandwidth resources for the media converter.

In a sixth aspect, an OLT is provided, comprising:

a receiver, configured to receive a CNU data message sent by a media converter, where the CNU data message is sent by the media converter to the OLT according to a sending authorization of the media converter, and the CNU data message includes: a CNU sends an authorization request, wherein the CNU sends the authorization request to request bandwidth resources of the CNU, and the sending authorization of the media converter comprises: the OLT allocates bandwidth resources for the media converter;

the processor is used for allocating bandwidth resources to the CNU according to the sending authorization request of the CNU;

a sender, configured to send a sending grant of a CNU to the media converter, so that the media converter sends the sending grant of the CNU to the CNU, where the sending grant of the CNU includes a bandwidth resource allocated by the OLT to the CNU.

In a seventh aspect, a system for dynamic bandwidth allocation is provided, including:

the third and fourth aspects provide an apparatus for dynamic bandwidth allocation.

In an eighth aspect, a system for dynamic bandwidth allocation is provided, comprising:

a media converter provided by the fifth aspect and an OLT provided by the sixth aspect.

After the scheme is adopted, the media converter receives a CNU data message sent by a CNU, wherein the CNU data message comprises a sending authorization request of the CNU, and the sending authorization request of the CNU is used for requesting bandwidth resources of the CNU; sending the CNU data message to an OLT according to the sending authorization of the media converter, wherein the CNU data message comprises a sending authorization request; the transmission authorization request of the media converter is used for indicating the bandwidth resource request of the media converter or the cache condition of data to be transmitted; the OLT allocates bandwidth resources to the CNU according to the sending authorization request of the CNU, and the sending authorization of the media converter comprises the following steps: and the OLT allocates bandwidth resources for the media converter. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, but not sends the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends uplink data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of an authorization window of a coaxial domain and an authorization window of an optical domain can be further avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an EPON network system;

fig. 2 is a schematic block diagram of another EPOC network system;

FIG. 3 is a schematic diagram of the structure of bandwidth allocation of the coaxial domain;

FIG. 4 is a diagram illustrating the structure of a GATE message;

FIG. 5 is a diagram illustrating the structure of a REPORT message;

fig. 6 is a flowchart of a method for dynamic bandwidth allocation with a media converter as an execution subject according to this embodiment;

FIG. 7 is a block diagram of a system to which the method of FIG. 6 is applied;

FIG. 8 is a flowchart of another method for dynamic bandwidth allocation with a media converter as an execution subject according to this embodiment;

fig. 9 is a flowchart of a method for dynamic bandwidth allocation with an OLT as an execution main body according to this embodiment;

fig. 10 is a flowchart of another method for dynamic bandwidth allocation with the OLT as an execution main body according to this embodiment;

fig. 11 is a schematic structural diagram of a dynamic bandwidth allocation apparatus provided in this embodiment;

fig. 12 is a schematic structural diagram of another dynamic bandwidth allocation apparatus provided in this embodiment;

fig. 13 is a schematic structural diagram of another dynamic bandwidth allocation apparatus provided in this embodiment;

fig. 14 is a schematic structural diagram of another dynamic bandwidth allocation apparatus provided in this embodiment;

fig. 15 is a schematic structural diagram of a media converter according to this embodiment;

fig. 16 is a schematic structural diagram of another media converter provided in this embodiment;

fig. 17 is a schematic structural diagram of an OLT according to this embodiment;

fig. 18 is a schematic structural diagram of a system for dynamic bandwidth allocation according to this embodiment;

fig. 19 is a schematic diagram of another system structure for dynamic bandwidth allocation according to this embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order that the following embodiments may be more clearly understood, a brief description of the results and principles of operation of an EPOC network system will first be provided.

As shown in fig. 1, in an EPON (Ethernet Passive Optical Network) Network system, a transmission direction from an OLT (Optical Line Terminal) to an ONU (Optical Network Unit) is a downlink direction, a TDM (Time-Division Multiplexing) manner is adopted, that is, downlink data transmission is continuous, the OLT continuously broadcasts information to each ONU, and each ONU selects data reception belonging to itself.

The transmission from the ONU to the OLT is in the uplink direction, a TDMA mode is adopted, namely, the uplink data transmission is burst, different ONUs occupy different uplink time slots, and a plurality of ONUs share the uplink in a time division multiplexing mode. There is a guard interval between each uplink timeslot to avoid collisions.

In order to ensure that the uplink data does not collide, the uplink transmission needs to adopt a ranging technique, measure the loop delay from the downlink transmission of the OLT to the uplink received data signal, and perform delay compensation accordingly, so as to ensure that after the uplink signals of each ONU are merged in a common optical fiber, a specified time slot is inserted, and that no collision occurs between the uplink signals and no gap is too large, even if the time for the signals transmitted by different ONUs to reach the OLT is different.

Fig. 2 is a schematic diagram of a system architecture of an EPOC, in which an MC may be used, but is not limited to, convert a format of data transmitted from an optical domain into a format suitable for transmission in a coax domain, and may also be used to convert a format of data transmitted from a coax domain into a format suitable for transmission in an optical domain.

Before the OLT performs data transmission with the MC and CNU, the OLT first needs to perform bandwidth allocation for the MC and CNU.

Specifically, the OLT performing bandwidth allocation for the CNU includes: the CNU sends a REPORT message to the OLT through the MC (at this time, the MC may be configured to convert the format of the coaxial data request message into a format suitable for transmission in the optical domain), where the REPORT message includes a bandwidth resource requested by the CNU or a buffer condition of data to be sent; the OLT allocates bandwidth for the CNU according to the received REPORT message, and sends a GATE message containing allocated bandwidth resources to the CNU through the MC (at this time, the MC can convert the format of the GATE message into a format suitable for transmission in the coaxial domain); the CNU sends corresponding data to the MC in the coaxial domain according to the received GATE message, and the MC forwards the corresponding data to the OLT, wherein the corresponding data comprises service data and REPORT message of the CNU. The subsequent steps are similar to the previous ones and are not described herein again.

The OLT carries out bandwidth allocation on the MC and comprises the following steps: the MC sends a REPORT message to the OLT, wherein the REPORT message comprises bandwidth resources requested by the MC or the cache condition of data to be sent; the OLT allocates bandwidth to the MC according to the received REPORT message, and sends a GATE message containing the allocated bandwidth resource to the MC, where the GATE message further includes but is not limited to: the starting time (i.e. the authorization starting time) when the MC sends data to the OLT, the time period during which the MC is allowed to send data, and the like (i.e. the authorization window); and the MC sends corresponding data to the OLT in the optical domain according to the received GATE message, wherein the corresponding data comprises the service data from the CNU, the REPORT message from the CNU and the REPORT message of the MC. The subsequent steps are similar to the previous ones and are not described herein again.

It should be noted that, in the coaxial domain, taking an OFMDA (Orthogonal Frequency Division multiple access) modulation scheme as an example, the OLT needs to perform two-dimensional bandwidth allocation based on time and Frequency to the CNU. As shown in fig. 3, a time frequency Block (RB) formed by constructing N symbols and M frequency Resource dimensions is the minimum scheduling Resource, and bandwidth resources allocated to the time frequency Block of each CNU can notify the CNU through a MAP (media accesses plan) message, that is, the MC converts the received GATE message into a MAP message and sends the MAP message to the CNU. In other words, the MC may be to convert a GATE message containing one-dimensional bandwidth resources based on time into a MAP message containing two-dimensional bandwidth resources based on time and frequency.

Fig. 4 is a schematic diagram of a GATE message format of an ethernet passive optical network. Wherein Grant # nLength may represent a signed Grant length (i.e. a Grant window), Grant # n Start time may represent a Grant Start time, and n is 1, 2, 3, 4, in other words, the OLT may simultaneously allocate at least one Grant window for the MC or CNU.

Fig. 5 is a schematic diagram illustrating the format of the REPORT message. Here, the Number of Queue sets may indicate the Number of buffer queues at the time of generating the REPORT message, the Queue # n REPORT may indicate the length of the buffer Queue n at the time of generating the REPORT message, and n is 1, 2, 3, 4, 5, 6, 7.

In the existing EPOC system, if the GATE message is directly sent to the CNU, because unpredictable processing delay and transmission delay exist between the CNU and the MC, there is deviation or jitter between the authorization window of the coaxial domain and the authorization window of the optical domain in the GATE message corresponding to the CNU, and it is very difficult to synchronize the two time domains of the optical domain and the coaxial domain, and in addition, there is an uncertain difference between the line rates of the coaxial domain and the optical domain, so that the line rate resources of the optical domain are wasted, and the performance of the system is further reduced.

In order to solve the above problem, the present embodiment provides a method for dynamic bandwidth allocation, where the execution subject of the method may be a media converter, and the media converter may be, but is not limited to: MC, CLT (Coaxial Line Terminal), and the like, as shown in fig. 6, include:

601. the media converter receives the CNU data request message sent by the CNU.

CNU data messages include, but are not limited to: the sending authorization request of the CNU may be, but is not limited to, used to request bandwidth resources of the CNU, or used to describe a buffering condition of data to be sent of the CNU.

602. And sending the CNU data message to the OLT according to the sending authorization of the media converter so that the OLT carries out bandwidth resource allocation on the CNU according to the sending authorization request of the CNU.

The transmission authorization of the media converter includes, but is not limited to: the OLT allocates bandwidth resources for the media converter.

After the scheme is adopted, the media converter receives a CNU data message sent by a CNU, wherein the CNU data message comprises a sending authorization request of the CNU, and the sending authorization request of the CNU is used for requesting bandwidth resources of the CNU; sending a CNU data message to the OLT according to the sending authorization of the media converter so that the OLT performs bandwidth resource allocation on the CNU according to the sending authorization request of the CNU, wherein the sending authorization of the media converter comprises the following steps: the OLT allocates bandwidth resources for the media converter. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, but not sends the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends uplink data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of an authorization window of a coaxial domain and an authorization window of an optical domain can be further avoided.

In order to enable those skilled in the art to more clearly understand the technical solution provided by the embodiment of the present invention, the following describes in detail the method for dynamic bandwidth allocation provided by the embodiment of the present invention through a specific embodiment.

The present embodiment provides another method for dynamic bandwidth allocation, which is a further extension of the method shown in fig. 6, where fig. 7 is a system structure diagram of the present embodiment, and the method may roughly include the following steps:

the media converter sends an authorization request to the OLT, and receives the sending authorization of the media converter sent by the OLT; meanwhile, the media converter can also receive a CNU (media channel Unit) sending authorization request sent by the CNU; the media converter sends a sending authorization request of the CNU, data of the CNU, a sending authorization request of the media converter and the like to the OLT according to an authorization start time and an authorization window in a received sending authorization of the media converter (the sending authorization request of the media converter may be used to request to send bandwidth resources of current queues, after receiving a sending authorization of a first media converter corresponding to the sending authorization request of the first media converter, the media converter sends a first part of data and a sending authorization request of a second media converter, and after receiving a sending authorization of the second media converter, the media converter sends a second part of data and a sending authorization request of a next media converter, which is described in detail later); if the media converter receives the sending authorization of the CNU, the sending authorization of the CNU after format conversion can be sent to the CNU (or the sending authorization of the CNU can also be directly sent to the CNU), and the CNU sends the service and management data and the sending authorization request of the next CNU to the media converter according to the sending authorization of the CNU.

As shown in fig. 8, the method specifically includes:

801. the media converter sends a request for a media converter's send grant to the OLT.

Further, the media converter's request for sending grant may be, but is not limited to, requesting uplink bandwidth resources of the CNU, and the media converter's request for sending grant includes, but is not limited to: the requested upstream bandwidth resources of the media converter.

As an implementation manner of this embodiment, the request for sending authorization of the media converter further includes, but is not limited to: each LLID (Logical Link Identifier ) is used for requesting data conditions to be sent or bandwidth resources, or media converter is used for requesting total data conditions to be sent or total bandwidth resources.

The bandwidth resource requested by the media converter can be, but is not limited to, a bandwidth resource for the media converter to send the media converter to the OLT, and the total data to be sent includes, but is not limited to: at least one of a request for a media converter to send authorization, data to be sent by the media converter, and a CNU data message.

As an implementation manner of this embodiment, the request for sending authorization of the media converter can be, but is not limited to, a REPORT message of the media converter, where the REPORT message is used to indicate the data bandwidth resource requested by the media converter, and the REPORT message includes, but is not limited to, the length of the data queue currently to be sent or the bandwidth resource request.

Further, the sending grant may refer to an upstream sending grant, including upstream of the optical domain and the coaxial domain.

802. The media converter receives the CNU data message sent by the CNU.

CNU data messages include, but are not limited to: the sending authorization request of the CNU includes but is not limited to: bandwidth resources requested by CNUs.

When the CNU has traffic and management data to be transmitted to the OLT, the CNU transmits a transmission authorization request of the CNU to the media converter.

As an implementation manner of this embodiment, the sending authorization request of the CNU may be a REPORT message of the CNU, where the REPORT message of the CNU includes but is not limited to: bandwidth resources requested by the CNU, or the length of a queue of data currently to be sent by the CNU, and the like.

Further, the CNU data message further includes: traffic and management data.

803. It is determined whether the format of the CNU data message is allowed to be transmitted in the optical domain. If not, step 804 is executed, and if allowed, step 805 is executed.

The present embodiment does not limit the determination of whether the format of the CNU data message is allowed to be transmitted in the optical domain, and is a technique known to those skilled in the art, and can be set according to actual needs, which is not described herein again.

804. And converting the format of the CNU data message, so that the CNU data message after the format conversion can be sent to the OLT.

If the format of the CNU data message is not allowed to be transmitted in the optical domain, the media converter needs to convert the format of the received CNU data message into a format suitable for transmission in the optical domain, so that the CNU data message after being converted into the format can be sent to the OLT.

805. The media converter receives a transmission grant sent by the OLT.

As an implementation manner of this embodiment, the sending authorization received by the media converter in this step may be a sending authorization of the media converter or a sending authorization of the CNU,

further, the sending authorization of the media converter or the sending authorization of the CNU provided in this embodiment may be a GATE message of the media converter or a GATE message of the CNU, respectively. The GATE message of the media converter includes bandwidth resources allocated by the OLT to the media converter according to the REPORT message of the media converter, that is, an authorization start time and an authorization window for the media converter to send data; the GATE message of the CNU includes bandwidth resources allocated by the OLT to the CNU according to the REPORT message of the CNU, that is, an authorization start time and an authorization window for the CNU to send data.

806. It is determined whether the sending authorization is a sending authorization of the media converter or a sending authorization of the CNU based on the identity contained in the sending authorization. If the media converter is authorized to send, step 807 is executed, and if the media converter is authorized to send, step 808 is executed.

The transmission authorization of the media converter includes, but is not limited to: identification of the media converter, CNU's sending authorization includes: identification of CNUs.

807. And sending the CNU data message to the OLT according to the sending authorization of the media converter so that the OLT carries out bandwidth resource allocation on the CNU according to the sending authorization request of the CNU.

Further, the media converter transmits data corresponding to the transmission grant of the media converter and a next media converter grant request of the media converter data, etc. following the scheduling principle of the MC.

In this embodiment, the data sent by the media converter to the OLT according to the sending authorization of the media converter is not limited, and is a technique known to those skilled in the art, and can be set according to actual needs, which is not described herein again.

Further, the CNU data message may include: the logical link of the CNU requesting the bandwidth resource is marked LLID. At least one LLID may be included in each CNU.

the media converter sends an authorization request for requesting bandwidth resources according to the total bandwidth resources required, the total bandwidth resources including: the sum of the bandwidth resources requested by all LLIDs, and the bandwidth resources requested by the media converter itself.

The method for acquiring the LLID of the CNU without the converter may include: obtaining from the CNU data message; or alternatively.

The media converter stores the corresponding relation between the LLID and the sending authorization time, and after receiving the sending authorization request, the media converter inquires the LLID corresponding to the sending authorization request received at the time according to the received sending authorization request.

The method for acquiring LLID by the media converter in this embodiment is not limited, and is a technique known to those skilled in the art, and can be set according to actual needs, which is not described herein.

Step 801 is performed.

808. It is determined whether the format of the sending grant of the CNU is allowed to be transmitted in the coaxial domain. If not, step 809 is executed, and if allowed, step 810 is executed.

The method for determining whether the format of the sending authorization of the CNU is allowed to be transmitted in the coaxial domain is not limited in this embodiment, and is a technique known to those skilled in the art, and can be set according to actual needs, and will not be described herein again.

809. The media converter performs format conversion on the transmission authorization of the CNU, so that the transmission authorization of the CNU after format conversion can be transmitted to the CNU.

The CNU belongs to a device of a coaxial domain, and the OLT belongs to a device of an optical domain, and the media converter needs to convert a format of the transmission grant received from the CNU into a MAP format suitable for transmission in the coaxial domain, so that the transmission grant of the CNU after the format conversion can be transmitted to the CNU.

The method for converting the sending authorization format of the CNU in this embodiment is not limited, and is a technique well known to those skilled in the art, and can be set according to actual needs, and will not be described herein again.

Further, the sending authorization of the CNU includes but is not limited to: and the OLT allocates bandwidth resources for the CNU according to the authorization request of the CNU after the format conversion.

Further, the bandwidth resource allocated by the OLT to the CNU may be, but is not limited to, used for the CNU to send the service and management data to the media converter, and send the authorization request of the CNU.

810. The media converter sends the CNU's transmission authorization to the CNU.

It should be noted that, if the format conversion is performed in the media converter receiving the sending authorization sent by the OLT in step 805, this step is to send the sending authorization of the CNU after the format conversion to the CNU by the media converter.

811. The CNU sends CNU data message to the media converter according to the received sending authorization of the CNU.

As an implementation of this embodiment. The sending authorization of the CNU may be, but is not limited to, a GATE message of the CNU including, but not limited to: the CNU sends the authorization start time and authorization window of the data, or the MAP message after format conversion, etc.

The CNU sends CNU data message to the media converter according to the received GATE message, wherein the CNU data message comprises: the current service and management data to be sent, or the current data bandwidth request to be sent, etc.

Further, CNU data messages include, but are not limited to: the service and management data of the CNU, and the CNU send an authorization request.

After the scheme is adopted, the media converter receives a CNU data message sent by a CNU, wherein the CNU data message comprises a sending authorization request of the CNU, and the sending authorization request of the CNU is used for requesting bandwidth resources of the CNU; sending a CNU data message to the OLT according to the sending authorization of the media converter and sending an authorization request, wherein the sending authorization request of the media converter is used for indicating a bandwidth resource request of the media converter or the caching condition of data to be sent; the OLT allocates bandwidth resources to the CNU according to the sending authorization request of the CNU, and the sending authorization of the media converter comprises the following steps: the OLT allocates bandwidth resources for the media converter. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, but not sends the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of the authorization window of the coaxial domain and the authorization window of the optical domain can be further avoided.

The embodiment provides another method for dynamic bandwidth allocation, where an execution subject of the method may be an OLT, as shown in fig. 9, including:

901. the OLT receives the CNU data message sent by the media converter.

The CNU data message may be sent by the media converter to the OLT according to the transmission authorization of the media converter, and includes but is not limited to: the sending authorization request of the CNU, which is used to request the bandwidth resource of the CNU, includes but is not limited to: the OLT allocates bandwidth resources for the media converter.

902. And allocating bandwidth resources for the CNU according to the sending authorization request of the CNU.

903. Sending the sending authorization of the CNU to the media converter, so that the media converter sends the sending authorization of the CNU to the CNU.

The sending authorization of the CNU includes but is not limited to: and the OLT allocates bandwidth resources for the CNU.

After the above scheme is adopted, the OLT receives a CNU data message sent by the media converter, where the CNU data message is sent by the media converter to the OLT according to the sending authorization of the media converter, and the CNU data message includes: the sending authorization request of the CNU is used for requesting the bandwidth resource of the CNU, and the sending authorization of the media converter comprises: OLT distributes bandwidth resource for media converter; according to the sending authorization request of the CNU, bandwidth resource allocation is carried out on the CNU; sending the sending authorization of the CNU to the media converter, so that the media converter sends the sending authorization of the CNU to the CNU, wherein the sending authorization of the CNU comprises the bandwidth resource allocated to the CNU by the OLT. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, but not sends the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of the authorization window of the coaxial domain and the authorization window of the optical domain can be further avoided.

The present embodiment provides another dynamic bandwidth allocation method, which is a further extension of the method shown in fig. 9, as shown in fig. 10, and includes:

1001. the OLT receives the CNU data message sent by the media converter.

Further, the CNU data message further includes: traffic and management data.

1002. And allocating bandwidth resources for the CNU according to the sending authorization request of the CNU.

Further, the bandwidth resource allocated by the OLT to the CNU according to the CNU authorization request may be used by the CNU to send service and management data and the CNU authorization request to the media converter.

1003. Sending the sending authorization of the CNU to the media converter so that the media converter sends the sending authorization of the CNU to the CNU.

1004. Receiving a transmission authorization request of the media converter sent by the media converter.

Further, the media converter's transmit authorization request may be, but is not limited to, a request for bandwidth resources of the media converter, and the media converter's transmit authorization request includes, but is not limited to: bandwidth resources requested by the media converter.

1005. And allocating the bandwidth resources to the media converter according to the transmission authorization request of the media converter.

Further, the CNU data message includes: the logical link of the CNU requesting the bandwidth resource is marked LLID.

Allocating bandwidth resources to the media converter based on the request for the media converter's transmit grant includes, but is not limited to: and respectively requesting bandwidth resources according to the broadband resources with different LLID requirements.

As an implementation manner of this embodiment, the media converter requests bandwidth resources according to the bandwidth resources required by different LLIDs, respectively, so that the OLT requests the bandwidth resources to allocate bandwidth resources to the CNUs according to different LLIDs.

Specifically, the media converter receives and sends CNU data messages respectively identified by LLID1 and LLID2 to the OLT, and the OLT can identify the services and management data of different CNUs through LLIDs; then, the OLT performs resource allocation for the service and management data identified by LLID1 and LLID2, respectively, obtains sending grants corresponding to LLID1 and LLID2, and can send sending grants corresponding to LLID1 and LLID2 to the media converter, respectively.

Or, allocating bandwidth resources to the media converter according to the request for sending authorization from the media converter further includes: requesting bandwidth resources according to the required total bandwidth resources, wherein the total bandwidth resources comprise: the sum of the bandwidth resources requested by all LLIDs, and the bandwidth resources requested by the media converter itself.

Specifically, the media converter receives and sends CNU data messages respectively identified by LLID1 and LLID2 to the OLT, and the OLT can identify the services and management data of different CNUs through LLIDs and can obtain the sum of the services and management data of the CNUs identified by LLIDs 1 and LLIDs 2 and the bandwidth resources locally requested by the media converter; and sending a sending authorization request containing the sum of the bandwidth resources to the OLT, allocating the bandwidth resources for the OLT according to the sum of the bandwidth resources, and sending a sending authorization to the media converter by the OLT.

The method for allocating bandwidth resources by the media converter in this embodiment is not limited, and is not limited to the above listed methods, and may be set according to actual needs, which is not described herein again.

1006. The transmission authorization of the media converter is sent to the media converter.

It should be noted that, in this embodiment, steps 1001 to 1003 are used to describe that the OLT performs bandwidth resource allocation for the CNU, and steps 1004 to 1006 are used to describe that the OLT performs bandwidth resource allocation for the media converter, where the OLT may perform bandwidth resource allocation for the CNU and the media converter at the same time, or may perform bandwidth resource allocation for the CNU and the media converter separately, but the order of performing resource allocation is not limited.

After the above scheme is adopted, the OLT receives a CNU data message sent by the media converter, where the CNU data message is sent by the media converter to the OLT according to the sending authorization of the media converter, and the CNU data message includes: the sending authorization request of the CNU is used for requesting the bandwidth resource of the CNU, and the sending authorization of the media converter comprises: OLT distributes bandwidth resource for media converter; according to the sending authorization request of the CNU, bandwidth resource allocation is carried out on the CNU; sending the sending authorization of the CNU to the media converter, so that the media converter sends the sending authorization of the CNU to the CNU, wherein the sending authorization of the CNU comprises the bandwidth resource allocated to the CNU by the OLT. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, but not sends the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends uplink data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of an authorization window of a coaxial domain and an authorization window of an optical domain can be further avoided.

In the following, some embodiments of virtual devices are provided, which correspond to the embodiments provided in fig. 6 to 10, respectively, above.

The present embodiment provides an apparatus for dynamic bandwidth allocation, as shown in fig. 11, including:

a first receiving unit 111, configured to receive a CNU data message sent by a CNU, where the CNU data message includes a sending authorization request of the CNU, and the sending authorization request of the CNU is used to request a bandwidth resource of the CNU;

a first sending unit 112, configured to send, to the OLT, a CNU data message according to a sending authorization of the media converter, so that the OLT performs bandwidth resource allocation on the CNU according to a sending authorization request of the CNU, where the sending authorization of the media converter includes: the OLT allocates bandwidth resources for the media converter.

After the scheme is adopted, the first receiving unit is used for receiving a CNU data message sent by a CNU, wherein the CNU data message comprises a sending authorization request of the CNU, and the sending authorization request of the CNU is used for requesting bandwidth resources of the CNU; a first sending unit, configured to send, to the OLT, a CNU data message according to a sending authorization of the media converter, so that the OLT performs bandwidth resource allocation on the CNU according to a sending authorization request of the CNU, where the sending authorization of the media converter includes: the OLT allocates bandwidth resources for the media converter. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, but not sends the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of the authorization window of the coaxial domain and the authorization window of the optical domain can be further avoided.

The present embodiment provides a dynamic bandwidth allocation apparatus, which is a further extension of the apparatus shown in fig. 11, as shown in fig. 12, and includes:

a first receiving unit 121, configured to receive a CNU data message sent by a CNU, where the CNU data message includes a sending authorization request of the CNU, and the sending authorization request of the CNU is used to request a bandwidth resource of the CNU;

a first sending unit 122, configured to send, to the OLT, a CNU data message according to a sending authorization of the media converter, so that the OLT performs bandwidth resource allocation on the CNU according to a sending authorization request of the CNU, where the sending authorization of the media converter includes: the OLT allocates bandwidth resources for the media converter.

Further, the apparatus for dynamic bandwidth allocation provided in this embodiment further includes:

a first judging unit 123, configured to judge whether a format of the CNU data message is allowed to be transmitted in the optical domain before sending the CNU data message to the OLT according to a sending authorization of the media converter;

a first converting unit 124, configured to, if not allowed, perform format conversion on the CNU data message, so that the CNU data message after format conversion can be sent to the OLT.

a second receiving unit 125, configured to receive a sending authorization sent by the OLT before sending the CNU data message to the OLT according to the sending authorization of the media converter;

a determining unit 126, configured to determine whether the sending authorization is a sending authorization of the media converter or a sending authorization of the CNU according to the identifier included in the sending authorization, where the sending authorization of the CNU includes a bandwidth resource allocated by the OLT for the CNU.

a second determining unit 127, configured to determine, after determining whether the sending authorization is a sending authorization of a media converter or a sending authorization of a CNU according to the identifier included in the sending authorization, if the sending authorization is a sending authorization of a CNU, determine whether a format of the sending authorization of the CNU is allowed to be transmitted in a coaxial domain;

a second converting unit 128, configured to perform format conversion on the sending authorization of the CNU if the sending authorization is not allowed, so that the sending authorization of the CNU after format conversion can be sent to the CNU;

a second sending unit 129, configured to send a sending authorization of the CNU after the format conversion to the CNU.

a third sending unit 1210, configured to send a sending authorization request of the media converter to the OLT before sending the CNU data message to the OLT according to the sending authorization of the media converter, where the sending authorization request of the media converter is used to request bandwidth resources of the media converter, so that the OLT allocates the bandwidth resources for the media converter according to the sending authorization request of the media converter;

a third receiving unit 1211 for receiving a transmission authorization of the media converter.

Further, the CNU data message received by the first receiving unit 121 further includes: traffic and management data.

Further, the CNU data message includes: a logic link mark LL ID of a CNU requesting bandwidth resources;

After the scheme is adopted, the first receiving unit is used for receiving a CNU data message sent by a CNU, wherein the CNU data message comprises a sending authorization request of the CNU, and the sending authorization request of the CNU is used for requesting bandwidth resources of the CNU; a first sending unit, configured to send, to the OLT, a CNU data message according to a sending authorization of the media converter, so that the OLT performs bandwidth resource allocation on the CNU according to a sending authorization request of the CNU, where the sending authorization of the media converter includes: the OLT allocates bandwidth resources for the media converter. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, but not sends the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends uplink data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of an authorization window of a coaxial domain and an authorization window of an optical domain can be further avoided.

The present embodiment provides another apparatus for dynamic bandwidth allocation, as shown in fig. 13, including:

a first receiving unit 131, configured to receive a CNU data message sent by the media converter, where the CNU data message is sent by the media converter to the OLT according to a sending authorization of the media converter, and the CNU data message includes: the CNU sends an authorization request, the CNU sends the authorization request to request bandwidth resources of the CNU, and the sending authorization of the media converter comprises: OLT distributes bandwidth resource for media converter;

a first allocating unit 132, configured to allocate bandwidth resources to the CNU according to the sending authorization request of the CNU;

a first sending unit 133, configured to send a sending grant of the CNU to the media converter, so that the media converter sends the sending grant of the CNU to the CNU, where the sending grant of the CNU includes a bandwidth resource allocated by the OLT for the CNU.

After the above scheme is adopted, the first receiving unit is configured to receive a CNU data message sent by the media converter, where the CNU data message is sent by the media converter to the OLT according to the sending authorization of the media converter, and the CNU data message includes: the CNU sends an authorization request, the CNU sends the authorization request to request bandwidth resources of the CNU, and the sending authorization of the media converter comprises: OLT distributes bandwidth resource for media converter; the first allocation unit is used for allocating bandwidth resources for the CNU according to the sending authorization request of the CNU; a first sending unit, configured to send a sending grant of the CNU to the media converter, so that the media converter sends the sending grant of the CNU to the CNU, where the sending grant of the CNU includes a bandwidth resource allocated to the CNU by the OLT. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, but not sends the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends uplink data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of an authorization window of a coaxial domain and an authorization window of an optical domain can be further avoided.

The present embodiment provides another dynamic bandwidth allocation apparatus, which is a further extension of the apparatus shown in fig. 13, as shown in fig. 14, and includes:

a first receiving unit 141, configured to receive a CNU data message sent by the media converter, where the CNU data message is sent by the media converter to the OLT according to a sending authorization of the media converter, and the CNU data message includes: the CNU sends an authorization request, the CNU sends the authorization request to request bandwidth resources of the CNU, and the sending authorization of the media converter comprises: OLT distributes bandwidth resource for media converter;

a first allocating unit 142, configured to perform bandwidth resource allocation for the CNU according to the sending authorization request of the CNU;

a first sending unit 143, configured to send the sending grant of the CNU to the media converter, so that the media converter sends the sending grant of the CNU to the CNU, where the sending grant of the CNU includes the bandwidth resource allocated by the OLT for the CNU.

a second receiving unit 144, configured to receive a transmission authorization request of the media converter sent by the media converter before sending a transmission authorization of the CNU to the media converter, where the transmission authorization request of the media converter is used to request a bandwidth resource of the media converter;

a second allocating unit 145 for allocating bandwidth resources to the media converter according to the transmission authorization request of the media converter;

a second sending unit 146, configured to send the media converter's sending authorization to the media converter.

Further, the CNU data message received by the first receiving unit 141 further includes: traffic and management data.

Further, the CNU data message includes: a logical link label LLID of a CNU requesting a bandwidth resource;

the distribution unit 142 includes:

a first allocation module 1421, respectively configured to request bandwidth resources of different LLIDs; or,

a second allocating module 1422, configured to request bandwidth resources according to the total bandwidth resources required, where the total bandwidth resources include: the sum of the bandwidth resources requested by all LLIDs, and the bandwidth resources requested by the media converter itself.

Some embodiments of physical devices are provided below, which correspond to the embodiments provided in fig. 6 to 10, respectively, above.

The present embodiment provides a media converter, as shown in fig. 15, including:

a receiver 151, configured to receive a CNU data message sent by a CNU, where the CNU data message includes a sending authorization request of the CNU, and the sending authorization request of the CNU is used to request bandwidth resources of the CNU;

a transmitter 152, configured to send, to the OLT, a CNU data message according to a sending authorization of the media converter, so that the OLT performs bandwidth resource allocation on the CNU according to the sending authorization request of the CNU, where the sending authorization of the media converter includes: the OLT allocates bandwidth resources for the media converter.

After the scheme is adopted, the receiver is used for receiving a CNU data message sent by a CNU, wherein the CNU data message comprises a sending authorization request of the CNU, and the sending authorization request of the CNU is used for requesting bandwidth resources of the CNU; a sender, configured to send, to the OLT, a CNU data message according to a sending authorization of the media converter, so that the OLT performs bandwidth resource allocation on the CNU according to a sending authorization request of the CNU, where the sending authorization of the media converter includes: the OLT allocates bandwidth resources for the media converter. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, but not sends the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends uplink data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of an authorization window of a coaxial domain and an authorization window of an optical domain can be further avoided.

The present embodiment provides another media converter, which is a further extension of the media converter shown in fig. 15, as shown in fig. 16, and includes:

a receiver 161, configured to receive a CNU data message sent by a CNU, where the CNU data message includes a sending authorization request of the CNU, and the sending authorization request of the CNU is used to request a bandwidth resource of the CNU;

a transmitter 162, configured to send, to the OLT, a CNU data message according to the sending authorization of the media converter, so that the OLT performs bandwidth resource allocation on the CNU according to the sending authorization request of the CNU, where the sending authorization of the media converter includes: the OLT allocates bandwidth resources for the media converter.

Further, the media converter provided in this embodiment further includes:

the processor 163 is further configured to determine whether the format of the CNU data message is allowed to be transmitted in the optical domain before sending the CNU data message to the OLT according to the sending authorization of the media converter; and if not, converting the format of the CNU data message, so that the CNU data message after the format conversion can be sent to the OLT.

Further, the receiver 161 is further configured to receive a sending authorization of the media converter sent by the OLT before sending the CNU data message to the OLT according to the sending authorization of the media converter;

the transmitter 162 is further configured to transmit a transmission authorization request of the media converter to the OLT before receiving a transmission authorization of the media converter transmitted by the OLT, where the transmission authorization request of the media converter is used to request the bandwidth resource of the media converter, so that the OLT allocates the bandwidth resource for the media converter according to the transmission authorization request of the media converter.

Further, the receiver 161 is further configured to receive a sending authorization of the CNU sent by the OLT after sending the CNU data message to the OLT according to the sending authorization of the media converter, where the sending authorization of the CNU includes: and the OLT allocates bandwidth resources for the CNU.

Further, the processor 163 is further configured to, after receiving the sending authorization of the CNU sent by the OLT, determine whether the format of the sending authorization of the CNU is allowed to be transmitted in the coaxial domain;

and a transmitter 162, configured to transmit the transmission authorization of the CNU after the format conversion to the CNU.

Further, the CNU data message received by the receiver 161 may further include: CNU service and management data and/or CNU logic link label LLID requesting bandwidth resource;

The present embodiment provides an OLT, as shown in fig. 17, including:

a receiver 171, configured to receive a CNU data message sent by the media converter, where the CNU data message is sent by the media converter to the OLT according to a sending authorization of the media converter, and the CNU data message includes: the CNU sends an authorization request, the CNU sends the authorization request to request bandwidth resources of the CNU, and the sending authorization of the media converter comprises: OLT distributes bandwidth resource for media converter;

a processor 172, configured to perform bandwidth resource allocation for the CNU according to the request for sending authorization of the CNU;

a transmitter 173, configured to send the sending grant of the CNU to the media converter, so that the media converter sends the sending grant of the CNU to the CNU, where the sending grant of the CNU includes the bandwidth resource allocated by the OLT for the CNU.

Further, the receiver 171 is further configured to receive a transmission authorization request of the media converter sent by the media converter before sending the transmission authorization of the CNU to the media converter, where the transmission authorization request of the media converter is used to request the bandwidth resource of the media converter;

the processor 172, configured to allocate bandwidth resources to the media converter according to the transmission authorization request of the media converter;

the transmitter 173 is also used to transmit the transmission authorization of the media converter to the media converter.

Further, the CNU data message received by the receiver 171 further includes: traffic and management data.

the processor 172 is specifically configured to request bandwidth resources of different LLIDs; or,

requesting bandwidth resources according to the required total bandwidth resources, wherein the total bandwidth resources comprise: the sum of the bandwidth resources requested by all LLIDs, and the bandwidth resources requested by the media converter itself.

After the above scheme is adopted, the receiver is configured to receive a CNU data message sent by the media converter, where the CNU data message is sent by the media converter to the OLT according to the sending authorization of the media converter, and the CNU data message includes: the CNU sends an authorization request, the CNU sends the authorization request to request bandwidth resources of the CNU, and the sending authorization of the media converter comprises: OLT distributes bandwidth resource for media converter; the processor is used for allocating bandwidth resources for the CNU according to the sending authorization request of the CNU; a transmitter, configured to send the sending grant of the CNU to the media converter, so that the media converter sends the sending grant of the CNU to the CNU, where the sending grant of the CNU includes the bandwidth resource allocated to the CNU by the OLT. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, but not sends the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends uplink data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of an authorization window of a coaxial domain and an authorization window of an optical domain can be further avoided.

The present embodiment provides a system for dynamic bandwidth allocation, as shown in fig. 18, including:

the dynamic bandwidth allocation apparatus 181 provided in fig. 11 or 12 and the dynamic bandwidth allocation apparatus 182 provided in fig. 13 or 14.

The present embodiment provides another system for dynamic bandwidth allocation, as shown in fig. 19, including:

the media converter 191 provided in fig. 15 or 16 and the OLT192 provided in fig. 17.

After the scheme is adopted, the media converter receives a CNU data message sent by a CNU, wherein the CNU data message comprises a sending authorization request of the CNU, and the sending authorization request of the CNU is used for requesting bandwidth resources of the CNU; sending a CNU data message to the OLT according to the sending authorization of the media converter so that the OLT performs bandwidth resource allocation on the CNU according to the sending authorization request of the CNU, wherein the sending authorization of the media converter comprises the following steps: the OLT allocates bandwidth resources for the media converter. The media converter sends the CNU data message to the OLT by using the bandwidth resource allocated to the OLT by the OLT, rather than sending the CNU data message to the OLT by using the bandwidth resource allocated to the CNU in the prior art, so that the media converter only sends the uplink data under the sending authorization of the media converter, and the problem of system performance reduction caused by deviation or jitter of the authorization window of the coaxial domain and the authorization window of the optical domain can be solved.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus necessary general hardware, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be substantially implemented or a part of the technical solutions contributing to the prior art may be embodied in the form of a software product, which is stored in a readable storage medium, such as a floppy disk, a hard disk, or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method of dynamic bandwidth allocation, comprising:

a media converter receives a CNU data message sent by a Coaxial Network Unit (CNU), wherein the CNU data message comprises a sending authorization request of the CNU, and the sending authorization request of the CNU is used for requesting bandwidth resources of the CNU;

sending the CNU data message to an Optical Line Terminal (OLT) according to the sending authorization of the media converter, so that the OLT allocates bandwidth resources to the CNU according to the sending authorization request of the CNU, wherein the sending authorization of the media converter comprises the following steps: the OLT allocates bandwidth resources for the media converter;

before the sending the CNU data message to the OLT according to the sending authorization of the media converter, the method further includes:

sending a sending authorization request of a media converter to the OLT, wherein the sending authorization request of the media converter is used for requesting bandwidth resources of the media converter, so that the OLT allocates the bandwidth resources for the media converter according to the sending authorization request of the media converter; and receiving a sending authorization of the media converter sent by the OLT.

2. The method of claim 1, wherein before the sending the CNU data message to the OLT in accordance with a sending authorization of a media converter, the method further comprises:

3. The method of claim 1, wherein after sending the CNU data message to an OLT in accordance with a sending authorization of the media converter, the method further comprises:

4. The method of claim 3, wherein after the receiving the transmission authorization of the CNU transmitted by the OLT, the method further comprises:

5. The method of claim 4, wherein the CNU data message comprises: a logical link label LLID of a CNU requesting a bandwidth resource;

the media converter sends authorization request to request bandwidth resource according to the broadband resource of different LLID requirement; or,

6. A method of dynamic bandwidth allocation, comprising:

an Optical Line Terminal (OLT) receives a Coaxial Network Unit (CNU) data message sent by a media converter, wherein the CNU data message is sent to the OLT by the media converter according to the sending authorization of the media converter, and the CNU data message comprises: a sending authorization request of a CNU, where the sending authorization request of the CNU is used to request bandwidth resources of the CNU, and the sending authorization of the media converter includes: the OLT allocates bandwidth resources for the media converter;

sending a sending authorization of a CNU to the media converter so that the media converter sends the sending authorization of the CNU to the CNU, wherein the sending authorization of the CNU comprises bandwidth resources allocated to the CNU by the OLT;

before the sending of the CNU's sending authorization to the media converter, the method further comprises:

receiving a transmission authorization request of the media converter sent by the media converter, wherein the transmission authorization request of the media converter is used for requesting bandwidth resources of the media converter; allocating bandwidth resources to the media converter according to the transmission authorization request of the media converter; transmitting a transmission authorization of the media converter to the media converter.

7. The method of claim 6, wherein the CNU data message comprises: a logical link label LLID of a CNU requesting a bandwidth resource;

8. A media converter, comprising:

a receiver, configured to receive a CNU data message sent by a coaxial network unit CNU, where the CNU data message includes a sending authorization request of the CNU, and the sending authorization request of the CNU is used to request a bandwidth resource of the CNU;

a sender, configured to send the CNU data message to an Optical Line Terminal (OLT) according to the sending authorization of the media converter, so that the OLT performs bandwidth resource allocation on the CNU according to the sending authorization request of the CNU, where the sending authorization of the media converter includes: the OLT allocates bandwidth resources for the media converter;

the receiver is further configured to receive a sending authorization of the media converter sent by the OLT;

the transmitter is further configured to send a request for sending authorization of the media converter to the OLT before the receiving of the request for sending authorization of the media converter sent by the OLT, where the request for sending authorization of the media converter is used to request bandwidth resources of the media converter, so that the OLT allocates the bandwidth resources to the media converter according to the request for sending authorization of the media converter.

9. The media converter of claim 8, further comprising:

a processor, configured to determine whether a format of the CNU data message is allowed to be transmitted in an optical domain before the CNU data message is sent to an OLT according to a sending authorization of a media converter; and if not, converting the format of the CNU data message, so that the CNU data message after the format conversion can be sent to the OLT.

10. The media converter of claim 8, wherein the receiver is further configured to receive a sending grant of a CNU sent by an OLT after sending the CNU data message to the OLT according to the sending grant of the media converter, wherein the sending grant of the CNU comprises: and the OLT allocates bandwidth resources for the CNU.

11. The media converter of claim 10, wherein the processor is further configured to determine whether a format of a transmission grant of a CNU is allowed to be transmitted in the coaxial domain after said receiving the transmission grant of the CNU transmitted by the OLT;

the sender is further configured to send the sending authorization of the CNU after the format conversion to the CNU.

12. The media converter of claim 11, wherein the CNU data message comprises: a logical link label LLID of a CNU requesting a bandwidth resource;

the sending authorization requests of the media converter are respectively used for requesting bandwidth resources of different LLIDs; or, the media converter sends an authorization request for requesting bandwidth resources according to the total bandwidth resources required, where the total bandwidth resources include: the sum of the bandwidth resources requested by all LLIDs, and the bandwidth resources requested by the media converter itself.

13. An optical line termination, OLT, comprising:

a receiver, configured to receive a coaxial network unit CNU data message sent by a media converter, where the CNU data message is sent by the media converter to the OLT according to a sending authorization of the media converter, and the CNU data message includes: a CNU sends an authorization request, wherein the CNU sends the authorization request to request bandwidth resources of the CNU, and the sending authorization of the media converter comprises: the OLT allocates bandwidth resources for the media converter;

a sender, configured to send a sending grant of a CNU to the media converter, so that the media converter sends the sending grant of the CNU to the CNU, where the sending grant of the CNU includes a bandwidth resource allocated to the CNU by the OLT;

the receiver is further configured to receive a transmission authorization request of the media converter sent by the media converter before the transmission authorization of the CNU is sent to the media converter, where the transmission authorization request of the media converter is used to request bandwidth resources of the media converter;

the processor is further configured to allocate bandwidth resources to the media converter according to the request for sending authorization from the media converter;

the transmitter is further configured to transmit a transmission authorization of the media converter to the media converter.

14. The OLT of claim 13, wherein the CNU data message comprises: a logical link label LLID of a CNU requesting a bandwidth resource;

the processor is specifically configured to request bandwidth resources according to broadband resources required by different LLIDs; or,

15. A system for dynamic bandwidth allocation, comprising:

the media converter of any of claims 8 to 12 and the optical line termination OLT of any of claims 13 to 14.