WO2014047787A1

WO2014047787A1 - Method, device and system for continuous window sending

Info

Publication number: WO2014047787A1
Application number: PCT/CN2012/081938
Authority: WO
Inventors: 孙方林
Original assignee: 华为技术有限公司
Priority date: 2012-09-25
Filing date: 2012-09-25
Publication date: 2014-04-03
Also published as: CN103828267A

Abstract

The present invention relates to a method, device and system for continuous window sending. The method comprises: receiving authorization windows delivered by an optical line terminal (OLT), the authorization windows comprising a first authorization window and a second authorization window; determining whether the first authorization window and the second authorization window are continuous authorization windows; and when the first authorization window and the second authorization window are continuous authorization windows, using a first time segment of the first authorization window and a second time segment of the second authorization window to send service data or management data to the OLT. Therefore, with the method, device and system for continuous window sending disclosed by the present invention, when an OLT allocates a plurality of continuous uplink windows to a same coaxial line terminal or optical network unit, continuous authorization windows are combined as a burst window, thereby saving a large amount of optical domain resources.

Description

Method, device and system for continuously transmitting windows

Background technique

With the development of communication technology, Ethernet Passive Optical Network (EPON) has been widely used as a new type of fiber access network technology. The Ethernet passive optical network includes an optical line terminal (OLT) on the central side, an optical network unit (ONU) on the user side, and an optical distribution network (ODN). The ODN provides an optical transmission channel between the OLT and the ONU.

In the EPON system, the OLT uses a dynamic bandwidth algorithm (DBA) to calculate the transmission window assigned to the ONU, that is, a time period, and is identified by a Logical Link Identifier (LLID), and then strobed. (GATE) The authorization mode of the message is sent to the ONU. After receiving the LLID carried by the authorization window, the ONU determines that the LLID carried in the authorization window belongs to its own ONU. The ONU decides to send data in the specified authorization window time window. The ONU needs to perform laser on, kser off, and synchronization (SYNC) operations in each authorization window, which is required for each uplink burst. In addition, the OLT utilizes the authorization in the DBA algorithm to be scheduled based on LLID, and a media converter (MC) or ONU can support multiple LLIDs.

If the OLT assigns multiple consecutive upstream windows to the same MC or ONU, there will be multiple bursts including laser on, laser off, and sync (SYNC). However, these multiple bursts belong to the same terminal device, and multiple operations such as laser on, laser off (kser off), and synchronization (SYNC) are performed, which wastes a lot of The embodiment of the invention provides a method, a device and a system for continuously transmitting a window, which solves the problem that the OLT allocates a plurality of consecutive uplink windows to the same MC or ONU, which causes waste of optical domain resources in the prior art. When the OLT allocates a plurality of consecutive uplink windows to the same MC or OJ, the continuous authorization window is merged into one burst window, thereby saving a large amount of light. In the first aspect, the embodiment of the present invention provides A method for continuously transmitting a window, the method comprising: receiving an authorization window sent by an optical line terminal OLT, where the authorization window includes a first authorization window and a second authorization window; determining the first authorization window and the second Whether the authorization window is a continuous authorization window; when the first authorization window and the second authorization window are consecutive authorization windows, utilizing the first time period of the first authorization window, and the second of the second authorization window The time period sends service data or management data to the OLT.

In a first possible implementation manner of the first aspect, the determining, by the first authorization window and the second authorization window, whether the first authorization window and the second authorization window are consecutive authorization windows specifically includes: Interval time of the first authorization window and the second authorization window; comparing an interval between the first authorization window and the second authorization window with a preset threshold; when the first authorization window and When the second authorization window interval is less than the preset threshold, it is determined that the first authorization window and the second authorization window are consecutive authorization windows.

In a second possible implementation manner of the first aspect, the determining, by the first authorization window and the second authorization window, whether the first authorization window and the second authorization window are consecutive authorization windows include: Determining, by the first authorization window, a number of the first authorization window, and acquiring a number of the second authorization window from the second authorization window; determining a number of the first authorization window and the second authorization window Whether the number is continuous; when the number of the first authorization window and the number of the second authorization window are consecutive, it is determined that the first authorization window and the second authorization window are consecutive authorization windows. In a second aspect, an embodiment of the present invention provides an apparatus for continuously transmitting a window, where the apparatus includes: a receiving unit, configured to receive an authorization window information delivered by an optical line terminal OLT, where the authorization window includes a first authorization a window and a second authorization window, and transmitting the first authorization window and the second authorization window to the determining unit; the determining unit, configured to receive the first authorization window and the second authorization window from the receiving unit, and determine the location Whether the first authorization window and the second authorization window are consecutive authorization windows, and when the first authorization window and the second authorization window are consecutive authorization windows, transmitting the first authorization window and the second authorization window to a sending unit, configured to receive, by the determining unit, the first authorization window and the second authorization window, using a first time period of the first authorization window, and a second time of the second authorization window The segment sends service data or management data to the OLT.

In a first possible implementation manner of the second aspect, the determining unit includes: a calculating subunit, configured to calculate an interval between the first authorization window and the second authorization window, and the first The interval between the authorization window and the second authorization window is transmitted to the comparison subunit, and the comparison subunit is configured to receive an interval between the first authorization window and the second authorization window from the second calculation subunit, Comparing the interval between the first authorization window and the second authorization window with a preset threshold, and when the first authorization window and the second authorization window interval are less than the preset threshold, The first authorization window and the second authorization window are transmitted to the determining subunit; the determining subunit is configured to receive the first authorization window and the second authorization window from the comparing subunit, and determine the first authorization window and the second The authorization window is the first authorization window and the second authorization window of the continuous authorization window.

In a second possible implementation manner of the second aspect, the determining unit includes: an acquiring subunit, configured to acquire, by using the first authorization window, a number of the first authorization window, and the second authorization The window acquires the number of the second authorization window, and transmits the number of the first authorization window and the number of the second authorization window to the determining subunit; the determining subunit is configured to obtain the subunit from the Receiving the number of the first authorization window and the number of the second authorization window, determining whether the number of the first authorization window and the number of the second authorization window are consecutive; The number of the first authorization window and the number of the second authorization window are consecutive, and it is determined that the first authorization window and the second authorization window are consecutive authorization windows.

In a third aspect, an embodiment of the present invention provides a coaxial line terminal or a coaxial network unit, where the terminal or unit includes: a receiver, configured to receive an authorization window sent by an optical line terminal OLT, where the authorization window is The first authorization window and the second authorization window are included, and the first authorization window and the second authorization window are transmitted to the processor; the processor receives the first authorization window and the second authorization window from the receiver, Determining whether the first authorization window and the second authorization window are consecutive authorization windows; when the first authorization window and the second authorization window are consecutive authorization windows, transmitting the first authorization window and the second authorization window a transmitter, configured to receive the first authorization window from the processor, and the second authorization window, utilizing a first time period of the first authorization window, and the second authorization window The second time period sends service data or management data to the OLT.

In a first possible implementation manner of the third aspect, the processor is further configured to calculate an interval between the first authorization window and the second authorization window, where the first authorization window and the first Comparing the interval of the second authorization window with the preset threshold; when the interval between the first authorization window and the second authorization window is less than the preset threshold, determining that the first authorization window and the second authorization window are A continuous authorization window.

In a second possible implementation manner of the third aspect, the processor is further configured to acquire, by using the first authorization window, a number of the first authorization window, and obtain the a number of the second authorization window; determining whether the number of the first authorization window and the number of the second authorization window are consecutive; when the number of the first authorization window and the number of the second authorization window are consecutive And determining that the first authorization window and the second authorization window are consecutive authorization windows.

In a fourth aspect, an embodiment of the present invention provides a coaxial network system based on an Ethernet passive optical network protocol, where the system includes: an optical line terminal, a plurality of media converters or optical network units as described above And a plurality of coaxial network units.

Method, device and system for receiving continuous window transmission according to embodiments of the present invention An authorization window sent by the optical line terminal OLT, the authorization window includes a first authorization window and a second authorization window; determining, according to the first authorization window and the second authorization window, whether the first authorization window and the second authorization window are consecutive authorizations a window; when the first authorization window and the second authorization window are consecutive authorization windows α, using the first time period of the first authorization window and the second time period of the second authorization window to send a service to the OLT Data or management data, so that when an optical line terminal (OLT) allocates multiple consecutive upstream windows to the same media converter (MC) or optical network unit (ONU), successive authorization windows are merged For a burst window, save a lot of light domain resources. Description

1-1 is a structural diagram of an Ethernet passive optical network system according to Embodiment 1 of the present invention; FIG. 1-2 is a coaxial network based on an Ethernet passive optical network protocol according to Embodiment 1 of the present invention. Protocol Over Coax, EPOC) architecture diagram of the system;

2 is a flowchart of a method for continuously transmitting a window according to Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of each authorization window according to Embodiment 3 of the present invention; FIG.

4 is a schematic diagram of a first authorization window and a second authorization window according to Embodiment 4 of the present invention; FIG. 6 is a schematic diagram of a device for continuously transmitting a window according to Embodiment 6 of the present invention;

7 is a schematic diagram of a judging unit in a device for continuously transmitting a window according to Embodiment 7 of the present invention; FIG. 8 is a schematic diagram of a judging unit in a device for continuously transmitting a window according to Embodiment 8 of the present invention; A schematic diagram of a media converter or optical network unit provided.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. Examples are some embodiments of the invention, and not all of the embodiments. Based on the embodiments of the present invention, those skilled in the art are not making creative labors. All other embodiments obtained below are within the scope of the invention.

The method, device and system for continuously transmitting a window according to an embodiment of the present invention, by receiving an authorization window sent by an optical line terminal OLT, the authorization window includes a first authorization window and a second authorization window; according to the first authorization window and the first Determining, by the authorization window, whether the first authorization window and the second authorization window are consecutive authorization windows; and transmitting the service data to the optical line terminal (OLT) by using the first time period of the first authorization window and the second time period of the second authorization window Or manage data. Thereby, when the optical line terminal (OLT) allocates multiple consecutive uplink windows to the same media converter (MC) or optical network unit (ONU), the multiple consecutive authorization windows are merged into one burst window. , thereby saving a lot of optical domain resources.

Figure i-i is an architecture diagram of an EPON system for an Ethernet passive optical network according to Embodiment 1 of the present invention. As shown in the figure, the EPON system mainly includes an optical line terminal (OLT) 11, an optical network unit (ONU) 12, and an optical line terminal (OLT) 11 and an optical splitter between the optical network unit (ONU) 12. ) 14.

In the EPON system, the optical line terminal (OLT) 11 calculates the authorization window assigned to the optical network unit (ONU) 12 by the DBA algorithm to the optical network unit (ONU) 12 via the optical splitter (Splitter) 14. The authorization window is identified by the LLID and is sent to the optical network unit (ONU) 12 in the authorization mode of the GATE message.

1-2 is a structural diagram of a coaxial network EPOC system based on an Ethernet passive optical network protocol according to Embodiment 1 of the present invention. As shown, the EPOC system mainly includes an optical line terminal (OLT) 11, a media converter (MC) 12, and a Coaxial Network Unit (CNU) 13. In addition, the EPOC system further includes an optical splitter 14 between the optical line terminal (OLT) 11 and the media converter (MC) 12, and a media converter (MC) 12 and a coaxial network unit (CNU). ) 13 coaxial splitter 15 . Wherein, the optical line terminal (OLT) 11 and the media converter (MC) 12 are connected by light and transmit information by using the optical fiber; the medium converter (MC) 12 and the coaxial network unit (CNU) 13 are coaxial Cables are connected and information is transmitted using coaxial cable.

The EPOC system introduces mature EPON technologies and protocols into the coaxial network (COAX). The EPON protocol is adopted in the COAX domain to implement end-to-end management, that is, the OLT can directly control the CNU of the COAX domain. At the same time, the architecture of EPOC is characterized by converting some or all of the optical branches into coaxial media through the media converter (MC) 12, thereby realizing the integration of optical fiber and coaxial, and transforming control information and user data into different The medium transmits signals.

Among them, in the EPOC system, the optical line terminal (OLT) 11 utilizes a dynamic bandwidth allocation algorithm.

(DBA) is the allocation window of the coaxial network unit (CMJ) 13 and is identified by the logical link label (LLID), and is sent to the media converter (MC) 12 by means of the authorization grant, and then converted by the medium. The device (MC) 12 forwards or converts to a new authorization mode and then delivers it to the Coax Network Unit (CNU) 13. Therefore, the Optical Line Terminal (OLT) 11 schedules the Coax Network Unit (CNU) 13 or the Media Converter (MC) 12 based on the Logical Link Flag (LLID). It is worth noting that in an EPON system, an Optical Line Terminal (OLT) sends an authorization window to an Optical Network Unit (ONU).

In the EPOC system, a plurality of coaxial network elements (CNUs) 13 are hung under a media converter (MC) 12, and each logical network element (CNU) 13 can have multiple logical link labels (LLIDs). . In a typical configuration, a media converter can support 128 LIJDs. In an EPON system, an ONU can also support approximately 200 LLIDs.

When an Optical Line Terminal (OLT) is provisioning a window to a Coaxial Network Element (CNU) 13, it is highly probable that a continuous grant window is assigned to a different LLID of the same MC, in the same Media Converter (MC). The successive grants of the grant window frequently and purposefully operate laser on, laser off and sync (SYNC) operations. Therefore, if you want to save optical resources, you need to combine multiple consecutive grant windows into one burst window, saving unnecessary laser on (iaser on), laser off (iaser off) and synchronization. Operations such as ( SYNC ) and used to send data or manage messages.

It is worth noting that the media converter (MC) involved in all embodiments of the present invention is equivalent to a coaxial line terminal (CLT) _tl

FIG. 2 is a flowchart of a method for continuously transmitting a window according to Embodiment 1 of the present invention. The method can be applied to the above EPOC system, and can also be applied to an EPON system. As shown, this The method for continuously transmitting a window provided by the embodiment of the present invention specifically includes the following steps:

Step 201: The media converter (MC) or the optical network unit (ONU) receives the authorization window sent by the optical line terminal OLT, and the authorization window includes a first authorization window and a second authorization window.

Specifically, a plurality of authorization windows sent by the OLT are received, and one of the plurality of authorization windows is used as the first authorization window; and an authorization window subsequent to the received first authorization window is used as the second authorization window. Here, the first authorization window and the second authorization window are defined, and the purpose is to determine whether any two of the received authorization windows are continuous windows, and only the consecutive windows can be merged into one burst window, if not Continuous windows cannot be combined into one burst window.

It should be noted that the "authorization" mentioned in the embodiment of the present invention may also be "gating", and other embodiments are the same, and are explained here.

Step 202: The MC or the ONU determines whether the first authorization window and the second authorization window are consecutive authorization windows.

Specifically, the MC or the ONU will determine whether the selected first authorization window and the second authorization window are consecutive windows from the selected first authorization window and the second authorization window of the plurality of authorization windows delivered by the OLT; The first authorization window and the second authorization window may be consecutive authorization windows, or may not be consecutive authorization windows, which need to be judged according to certain criteria. When the first authorization window and the second authorization window are consecutive authorization windows, it is indicated that there is no other authorization window between the first authorization window and the second authorization window, and the first authorization window and the second authorization window are available. Merging into a burst window; when the first authorization window and the second authorization window are not consecutive authorization windows, there may be other authorization windows between the first authorization window and the second authorization window, so that The first authorization window and the second authorization window are merged into one burst window.

Step 203: When the first authorization window and the second authorization window are consecutive authorization windows, use the first time period of the first authorization window and the second time period of the second authorization window to send service data or management data to the OLT. Wherein, the first time period of the first authorization window is when the laser is off (laser off) Segment, or the sum of the laser off period and the end of burst (EOB) period; the second period of the second authorization window is a laser on period, or a laser on period and The sum of the sync (SYNC) periods.

Specifically, each authorization window, including the first authorization window and the second authorization window, is generally divided into five time segments. As shown in Figure 3, the five time periods are: laser on, synchronization (SYNC), number of transmissions, end of burst (EOB), and laser off. The first time period in the embodiment of the present invention includes laser off, or includes laser off and burst end (EOB), the second period includes laser on, or includes Laser on and sync ( SYNC ).

It is worth noting that the EPON system includes but is not limited to the 1GEPON system and the 10GEPON system. In the 10G EPON system, the burst end (EOB) period is included, and the first period includes laser off and burst. End (EOB); While the 1G EPON system does not include the end of burst (EOB) period, the first time period only includes laser off.

In the 10G EPON system, when the first authorization window and the second authorization window are consecutive authorization windows, the laser off and burst end (EOB) of the first authorization window are cancelled, and the laser of the second authorization window is cancelled. Turn on (lason on) and sync (SYNC), as shown in the cancel section of Figure 4, using the cancellation section in Figure 4 to send data or management information.

FIG. 5 is a flowchart of a method for continuously transmitting a window according to Embodiment 2 of the present invention. The method is used by the MC or the ONU to determine whether the first authorization window and the second authorization window are consecutive authorization windows. As shown in the figure, the method for continuously transmitting a window according to an embodiment of the present invention specifically includes the following steps:

Step 501, the MC or the ONU calculates an end time of the first authorized window.

The sum obtained by adding the start time of the first authorization window to the grant length of the authorization window is the end time of the first authorization window.

Step 502: Calculate an interval between the first authorization window and the second authorization window according to an end time of the first authorization window.

Specifically, the start time of the second authorization window is subtracted from the junction of the first authorization window. The difference obtained after the bundle time is the interval between the first authorization window and the second authorization window.

Step 503: Compare an interval between the first authorization window and the second authorization window with a preset threshold. Among them, the default threshold is the smallest authorization window.

Specifically, the minimum authorization window can be estimated by existing standard and actual systems, or the OLT can notify the ONU or MC by operating Operation Administration and Maintenance (OAM) or other messages.

In the 1GEPON system, the laser off (laser off) and laser on (laser on) times default to 512ns, and the synchronization (SYNC) is sent by OL.T, but for all ONUs (SYWC) The same value.

In the 10GEPON system, the laser off and laser on time is reported by the ONU to the OLT, so the minimum time is unknown between the ONUs; the synchronization (SYNC) is sent by the OLT, but All ONU synchronizations (SYNC) are the same value. The decision threshold of the continuous authorization (grani) window can be set to synchronous (SYNO + 64 bytes (bytes), or the ONU can be notified by the OLT through OAM or other messages. MC's smallest authorization (grant) window.

Step 504: When the interval between the first authorization window and the second authorization window is less than a preset threshold, determining that the first authorization window and the second authorization window are consecutive authorization windows.

Specifically, when the interval between the first authorization window and the second authorization window is less than the preset threshold, the first authorization window and the second authorization window are consecutive authorization windows; when the interval between the first authorization window and the second authorization window is not less than When the threshold is preset, it indicates that the first authorization window and the second authorization window are not consecutive authorization windows.

In addition, another method for the MC or the ONU to determine whether the first authorization window and the second authorization window are consecutive authorization windows is: The OLT numbers each authorization window, and the MC or the ONU judges by the number of the authorization window. Whether it is a continuous authorization window, when the number is continuous, the authorization window is also continuous. The following is a detailed description of the steps to determine whether a continuous authorization window is by number: Step a, obtaining the number of the first authorization window from the first authorization window, and acquiring the number of the second authorization window from the second authorization window;

Step b, determining whether the number of the first authorization window and the number of the second authorization window are consecutive; when the number of the first authorization window and the number of the second authorization window are consecutive, determining the first authorization window and the second authorization window For a continuous authorization window.

Two methods for determining whether the first authorization window and the second grant right window are consecutive authorization windows are disclosed in the embodiment of the present invention. However, there are many methods for judging whether the first authorization window and the second authorization window are continuous authorization windows, and are not enumerated here.

Therefore, the method for continuously transmitting a window according to an embodiment of the present invention receives a first authorization window and a second authorization window delivered by an optical line terminal (OLT); and determining, according to the first authorization window and the second authorization window, Whether the first authorization window and the second authorization window are consecutive authorization windows; when the first authorization window and the second authorization window are consecutive authorization windows, canceling the first time period of the first authorization window, and a second time period of the second authorization window; transmitting the service data or management to the optical line terminal (OLT) by using the first time period of the first authorization window and the second time period of the second authorization window Data, thereby realizing the merging of successive authorization windows into one burst window when the optical line terminal (OLT) assigns multiple consecutive upstream windows to the same media converter (MC) or optical network unit (ONU) , thereby saving a lot of optical domain resources.

FIG. 6 is a schematic diagram of an apparatus for continuously transmitting a window according to Embodiment 6 of the present invention. The apparatus is for performing the method of continuous transmission of windows provided by Embodiments 2 through 5 of the present invention. As shown in the figure, the apparatus for continuously transmitting a window according to an embodiment of the present invention specifically includes: a receiving unit determining unit 62 and a transmitting unit 63.

The receiving unit 61 is configured to receive the first authorization window and the second authorization window delivered by the optical line terminal OLT, and transmit the first authorization window and the second authorization window to the determining unit 62.

Specifically, the receiving unit 61 receives a plurality of authorization windows issued by the OLT, and uses one of the plurality of authorization windows as the first authorization window; and the authorization window after the received first authorization window is used as the second authorization window. . Here, the first authorization window and the second authorization window are defined, and the purpose is It is judged whether any two of the received authorization windows are continuous windows, and only consecutive windows can be merged into one burst window. If it is not a continuous window, it cannot be merged into one burst (urst) ) window.

The determining unit 62 is configured to receive the first authorization window and the second authorization window from the receiving unit 61, determine whether the first authorization window and the second authorization window are consecutive authorization windows, and when the first authorization window and the second authorization window For a continuous authorization window, the first authorization window and the second authorization window are transmitted to the transmitting unit 63.

The sending unit 63 is configured to receive the first authorization window and the second authorization window from the determining unit 62, and send the service data or the management data to the OLT by using the first time period of the first authorization window and the second time period of the second authorization window. The first time period of the first grant window is a laser off period, or a sum of a laser off period and an end of burst (EOB) period; a second time of the second authorization window The segment is the laser open period ( i _ase r on ) period, or the sum of the laser on period and the sync (SYNC) period.

Specifically, each of the authorization windows includes a first authorization window and a second authorization window, and is divided into five time segments. As shown in Figure 3, the five time periods are: laser on, sync (SYNC), transmit data, burst end (EOB), and laser off (laser off). The first time period in the embodiment of the present invention includes laser off, or includes laser off and burst end (EOB), the second period includes laser on, or includes Laser on (laser on) and sync (SY-NC).

In the 10G EPON system, when the first authorization window and the second authorization window are consecutive authorization windows, the laser off (kereroff) and the burst tie (EOB) of the first authorization window are canceled, and the second authorization window is Laser on (laser on) and sync (SYNC), canceled as shown in Figure 4. section.

Preferably, the apparatus for determining the continuous transmission of the window provided by the embodiment of the present invention further includes: a calculation subunit 71, a comparison subunit 72, and a determination subunit 73, as shown in FIG.

The calculating subunit 71 is configured to calculate an interval time between the first authorization window and the second authorization window, and transmit the interval between the first authorization window and the second authorization window to the comparison subunit 73.

Specifically, the sum obtained by adding the start time of the first grant window to the grant length of the authorization window is the end time of the first authorization window. Calculating an interval between the first authorization window and the second authorization window according to an end time of the first authorization window, that is, the difference between the start time of the second authorization window and the end time of the first authorization window is the first difference The interval between the authorization window and the second authorization window.

The comparison subunit 72 is configured to receive the interval between the first authorization window and the second authorization window from the second calculation subunit 71, compare the interval between the first authorization window and the second authorization window with a preset threshold, and when the first When the authorization window and the second authorization window interval are less than the preset threshold, the first authorization window and the second authorization window are transmitted to the determination sub-unit 73.

Specifically, the preset threshold is a minimum authorization window. The smallest authorization window can be estimated by existing standard and actual systems, or by the OLT via OAM or other messages to inform the ONU or media converter MC.

The determining sub-unit 73 is configured to receive the first authorization window and the second authorization window from the comparison sub-unit 72, and determine that the first authorization window and the second authorization window are consecutive authorization windows.

Preferably, the determining unit 62 of the apparatus for continuously transmitting windows according to the embodiment of the present invention further includes: an obtaining subunit 81 and a judging subunit 82, as shown in FIG. 8.

The obtaining sub-unit 81 is configured to acquire the number of the first authorization window from the first authorization window, and obtain the number of the second authorization window from the second authorization window, and transmit the number of the first authorization window and the number of the second authorization window to Judging subunit 82;

The determining sub-unit 82 is configured to receive, by the obtaining sub-unit 81, the number of the first authorization window and the number of the second authorization window, and determine whether the number of the first authorization window and the number of the second authorization window are consecutive; When the number of the first authorization window and the number of the second authorization window are consecutive, it is determined that the first authorization window and the second authorization window are consecutive authorization windows.

Therefore, the device for continuously transmitting the window according to the embodiment of the present invention receives the authorization window sent by the optical line terminal OLT through the receiving unit, and the authorization window includes a first authorization window and a second authorization window; Whether the authorization window and the second authorization window are consecutive authorization windows; when the first authorization window and the second authorization window are consecutive authorization windows, using the first time of the first authorization window by the sending unit, and Transmitting the service data or the management data to the OLT in a second time period of the second authorization window, thereby realizing that when the optical line terminal (OLT) allocates multiple consecutive uplink windows to the same media converter (MC) or light In the case of a network element (ONU), successive authorization windows are combined into one burst window, saving a large amount of optical domain resources.

The embodiment of the present invention further provides a system for continuously transmitting a window, the system comprising: an optical line terminal (OLT), and a plurality of devices for continuously transmitting windows according to any one of Embodiments 6 to 7 of the present invention, And a plurality of coaxial network units.

FIG. 9 is a schematic diagram of a media converter or an optical network unit according to Embodiment 8 of the present invention. The media converter or optical network unit is operative to perform the method of continuous transmission of windows provided by embodiments 2 through 5 of the present invention. As shown in the figure, the media converter or optical network unit provided by the embodiment of the present invention specifically includes: a receiver 91, a processor 92, and a transmitter 93.

The receiver 91 is configured to receive an authorization window sent by the optical line terminal OLT, where the authorization window includes a first authorization window and a second authorization window, and transmit the first authorization window and the second authorization window to the processor 92.

The processor 92 receives the first authorization window and the second authorization window from the receiver 91, and determines whether the first authorization window and the second authorization window are consecutive authorization windows according to the first authorization window and the second authorization window; when the first authorization window When the second authorization window is a continuous authorization window, the first authorization window and the second authorization window are transmitted to the transmitter 93.

The transmitter 93 is configured to receive the first authorization window and the second authorization window from the processor 92, using the first time period of the first authorization window, and the second time period and the third time period of the second authorization window The OLT sends service data or management data.

Preferably, the receiver 91 is configured to receive a plurality of authorization windows sent by the OLT, and use one of the plurality of authorization windows as the first authorization window; and use an authorization window after the received first authorization window as the first Second grant rights window.

Specifically, a plurality of authorization windows sent by the OLT are received; an authorization window of the plurality of authorization windows is used as the first authorization window, and an authorization window subsequent to the first authorization window of the plurality of authorization windows is used as the second authorization window. Here, the first authorization window and the second authorization window are defined, and the purpose is to determine whether any two of the received authorization windows are continuous windows, and only the consecutive windows can be merged into one burst window, if not Continuous windows cannot be combined into one burst window.

Each of the above authorization windows includes a first authorization window and a second authorization window, which are divided into five time segments as shown in FIG. 3, and the five time periods are: laser on (iaser on), synchronization (SYNC) , send data, end of burst (EOB), and laser off (laser off). The first time period in the embodiment of the present invention includes laser off, or includes laser off and burst end (E0B ), the second period includes laser on, or includes Laser on and sync ( SYNC ).

It is worth noting that EPON systems include, but are not limited to, 1GEPON systems and iOGEPON systems. In the 10G EPON system, the burst end (EOB) period is included, and the first period includes laser off and burst end (BOB); and the 1G EPON system does not include the burst junction. ( EOB ) During this time period, the first time period only includes laser off.

In the 10G EPON system, when the first authorization window and the second authorization window are consecutive authorization windows, the laser off and burst end (EOB) of the first authorization window and the laser of the second authorization window are cancelled. Turn on ( laser on ) and sync ( SYNC ), as shown in the cancel section in Figure 4.

Preferably, the processor 92 is further configured to calculate an association time of the first authorization window; calculate an interval between the first authorization window and the second authorization window according to an end time of the first authorization window; The interval between the window and the second authorization window is compared with a preset threshold; when the interval between the first authorization window and the second authorization window is less than a preset threshold, determining that the first authorization window and the second authorization window are consecutive authorizations window. The default threshold is the smallest authorization window.

Specifically, the sum obtained by adding the start time of the first authorization window to the length of the authorization window (grant kngth ) is the end time of the first authorization window; the start time of the second authorization window ( Start time) The difference obtained after subtracting the end time of the first authorization window is the interval between the first authorization window and the second authorization window; the preset threshold is the smallest authorization window, and the minimum authorization window can pass the existing standard Inferred with the actual system, the OLT can also inform the ONU or MC through OAM or other messages.

Preferably, the processor 92 is further configured to obtain a number of the first authorization window from the first authorization window, and obtain a number of the second authorization window from the second authorization window; determine the number of the first authorization window and the second authorization window Whether the number of the first authorization window and the number of the second authorization window α are consecutive, it is determined that the first authorization window and the second authorization window are consecutive authorization windows.

Therefore, the media converter or the optical network unit provided by the embodiment of the present invention receives the authorization window sent by the optical line terminal (OLT) through the receiver, and the authorization window includes the first authorization window and the second authorization window; Determining whether the first authorization window and the second authorization window are consecutive authorization windows; when the first authorization window and the second authorization window are consecutive authorization windows, transmitting the first authorization window α and the second authorization window to the transmitter; Finally, the transmitter transmits the service data or the management data to the optical line terminal (OLT) by using the first time period of the first authorization window and the second time period of the second authorization window, thereby realizing the light When the line terminal (OLT) allocates multiple consecutive uplink windows to the same media converter (MC) or optical network unit (ONU), the continuous authorization window is merged into one burst window, thereby saving a large number of optical domains. Resources.

An embodiment of the present invention further provides an EPOC system, including: an optical line terminal (OLT), a plurality of coaxial line terminals or coaxial network units provided by Embodiment 9 of the present invention, and a plurality of coaxial network units. . A person skilled in the art should further appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the examples have been described in a general manner in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art may depart from the scope of the invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. The software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.

The specific embodiments described above are intended to be illustrative of the present invention. The invention is not intended to limit the scope of the present invention. Any modifications and equivalents are made within the spirit and scope of the present invention. And improvements, etc., are all included in the scope of protection of the present invention.

Claims

Claim CP12241

1. A method for window continuous transmission, characterized in that the method includes:

Receive an authorization window issued by the optical line terminal OLT, where the authorization window includes a first authorization window and a second authorization window;

Determine whether the first authorization window and the second authorization window are continuous authorization windows; when the first authorization window and the second authorization window are continuous authorization windows, use the first authorization window The first time period of the second authorization window and the second time period of the second authorization window are used to send service data or management data to the OLT.

2. The method for window continuous transmission according to claim i, characterized in that the receiving authorization window issued by the optical line terminal OLT. , the authorization window includes a first authorization window and a second authorization window, specifically:

Receive multiple authorization windows issued by the OLT;

An authorization window among the plurality of authorization windows is used as the first authorization window, and an authorization window after the first authorization window among the plurality of authorization windows is used as the second authorization window.

Π.

3. The method for continuously sending windows according to claim 1 or 2, characterized in that, judging whether the first authorization window and the second authorization window are based on the first authorization window and the second authorization window. Continuous authorization windows specifically include:

Calculate the interval time between the first authorization window and the second authorization window;

Compare the interval between the first authorization window and the second authorization window with a preset threshold;

When the interval time between the first authorization window and the second authorization window is less than the preset threshold, it is determined that the first authorization window and the second authorization window are continuous authorization windows.

4. The method of continuously sending windows according to claim 3, characterized in that the preset threshold is the smallest authorization window

5. The method for window continuous transmission according to claim 1 or 2, characterized in that: Determining whether the first authorization window and the second authorization window are consecutive authorization windows according to the first authorization window and the second authorization window specifically includes:

Obtain the number of the first authorization window from the first authorization window, and obtain the number of the second authorization window from the second authorization window;

Determine whether the number of the first authorization window and the number of the second authorization window are continuous; when the number of the first authorization window and the number of the second authorization window are continuous, then determine whether the number of the first authorization window is continuous. The authorization window and the second authorization window are consecutive authorization windows.

6. The method for window continuous transmission according to any one of claims 1 to 5, characterized in that, the first time period of the first authorization window is a laser off period, or a laser off period and a burst. The sum of end periods; the second time period of the second authorization window is the laser on period, or the sum of the laser on period and the synchronization period.

7. A device for window continuous transmission, characterized in that the device includes:

A receiving unit, configured to receive an authorization window issued by the optical line terminal OLT, where the authorization window includes a first authorization window and a second authorization window, and transmit the first authorization window and the second authorization window to the judgment unit;

A judging unit, configured to receive the first authorization window and the second authorization window from the receiving unit, judge whether the first authorization window and the second authorization window are consecutive authorization windows, and when the first authorization window and the second authorization window is a continuous authorization window, transmitting the first authorization window and the second authorization window to the sending unit;

A sending unit, configured to receive the first authorization window and the second authorization window from the judgment unit, using the first time period of the first authorization window and the second time period of the second authorization window. Send business data or management data to the OLT during the time period.

8. The device for continuously sending windows according to claim 7, wherein the receiving unit is specifically configured to receive multiple authorization windows issued by the OLT; authorize one of the multiple authorization windows. The window is used as the first authorization window, and an authorization window after the first authorization window among the plurality of authorization windows is used as the second authorization window.

9. The device for window continuous transmission according to claim 7 or 8, characterized in that the judgment unit includes:

Calculation subunit, used to calculate the interval time between the first authorization window and the second authorization window, and transmit the interval time between the first authorization window and the second authorization window to the comparison subunit-unit I

A comparison subunit, configured to receive the interval time between the first authorization window and the second authorization window from the second calculation subunit, and compare the interval time between the first authorization window and the second authorization window with Compare the preset threshold, and when the interval between the first authorization window and the second authorization window is less than the preset threshold, transmit the first authorization window and the second authorization window to the determination subunit;

Determining subunit, configured to receive the first authorization window and the second authorization window from the comparison subunit, and determine that the first authorization window and the second authorization window are consecutive authorization windows, the first authorization window and the second authorization window. 2. Authorization window.

10. The window continuous sending method according to claim 9, characterized in that the preset threshold is the minimum authorization window.

11. The device for window continuous transmission according to claim 7 or 8, characterized in that the judgment unit includes:

Obtaining subunit, configured to obtain the number of the first authorization window from the first authorization window, obtain the number of the second authorization window from the second authorization window, and obtain the number of the first authorization window. The number and the number of the second authorization window are transmitted to the judgment subunit;

A judgment subunit, configured to receive the number of the first authorization window and the number of the second authorization window from the acquisition subunit, and judge the number of the first authorization window and the number of the second authorization window. Whether the number of the first authorization window and the number of the second authorization window are continuous, then it is determined that the first authorization window and the second authorization window are continuous authorization windows.

12. The device for continuously sending windows according to any one of claims 7 to 11, characterized in that the first time period of the first authorization window is a laser off period, or a laser off period. The sum of the period and the burst end period; the second time period of the second authorization window is the laser on period, or the sum of the laser on period and the synchronization period.

13. A media converter or optical network unit, characterized in that the media converter or optical network unit includes:

The receiver is configured to receive the authorization window issued by the optical line terminal OLT, the authorization window includes a first authorization window and a second authorization window, and transmit the first authorization window and the second authorization window to processor;

The processor receives the first authorization window and the second authorization window from the receiver, and determines whether the first authorization window and the second authorization window are consecutive authorization windows; when the first authorization window and the second authorization window The authorization window is a continuous authorization window, and the first authorization window and the second authorization window are transmitted to the transmitter;

A transmitter configured to receive the first authorization window and the second authorization window from the processor, using a first time period of the first authorization window, and a third time period of the second authorization window.

14. The media converter or optical network unit according to claim 13, wherein the receiver is specifically configured to receive multiple authorization windows issued by the OLT; The authorization window is used as the first authorization window, and an authorization window after the first authorization window among the plurality of authorization windows is used as the second authorization window.

15. The media converter or optical network unit according to claim 13 or 14, characterized in that the processor is also used to calculate the interval time between the first authorization window and the second authorization window; The interval time between the first authorization window and the second authorization window is compared with a preset threshold; when the interval time between the first authorization window and the second authorization window is less than the preset threshold, it is determined that the first authorization window The authorization window and the second authorization window are consecutive authorization windows.

16. The media converter or optical network unit according to claim 15, wherein the preset threshold is the minimum authorization window.

17. The media converter or optical network unit according to claim 13 or 14, characterized in that The processor is further configured to obtain the number of the first authorization window from the first authorization window, and obtain the number of the second authorization window from the second authorization window; determine the first authorization Whether the number of the window and the number of the second authorization window are consecutive; when the number of the first authorization window and the number of the second authorization window are consecutive, it is determined that the first authorization window and the second authorization window are The window is a continuous authorization window.

18. The media converter or optical network unit according to any one of claims 13 to 17, characterized in that, the first time period of the first authorization window is a laser off period, or a laser off period and The sum of burst end periods; the second time period of the second authorization window is the laser on period, or the sum of the laser on period and the synchronization period.

19. A coaxial network system based on Ethernet passive optical network protocol, characterized in that the system includes: an optical line terminal, a plurality of media converters or optical networks according to any one of claims 13 to 18 unit, and multiple coaxial network units.