WO2014190495A1 - 一种物理帧边界的调整方法、相关设备及系统 - Google Patents

一种物理帧边界的调整方法、相关设备及系统 Download PDF

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Publication number
WO2014190495A1
WO2014190495A1 PCT/CN2013/076344 CN2013076344W WO2014190495A1 WO 2014190495 A1 WO2014190495 A1 WO 2014190495A1 CN 2013076344 W CN2013076344 W CN 2013076344W WO 2014190495 A1 WO2014190495 A1 WO 2014190495A1
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WIPO (PCT)
Prior art keywords
physical frame
boundary
coaxial domain
authorization message
period
Prior art date
Application number
PCT/CN2013/076344
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English (en)
French (fr)
Inventor
孙方林
张利
赵泉波
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2013/076344 priority Critical patent/WO2014190495A1/zh
Priority to CN201380000708.0A priority patent/CN104335541B/zh
Publication of WO2014190495A1 publication Critical patent/WO2014190495A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q11/0067Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0084Quality of service aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13166Fault prevention

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, a related device, and a system for adjusting physical frame boundaries. Background technique
  • EPON Ethernet Passive Optical Network
  • MAC medium access control
  • the optical line terminal (OLT) 1 and The medium conversion device 2 is connected by an optical fiber
  • the medium conversion device 2 and the coaxial network unit (CNU) 3 are connected by a coaxial cable
  • the medium conversion device can be a Fiber Coaxial Unit (FCU).
  • FCU Fiber Coaxial Unit
  • CMC Coax Media Converter
  • the OLT uniformly allocates uplink resources to the FCU and the CNU.
  • the OLT periodically sends a GATE message to the FCU through the GATE message in the discovery window or the polling period, and forwards the FCU and the source to the CNU through the GATE message.
  • the OLT allocates uplink resources only to the FCU.
  • the OLT periodically sends a GATE message to the FCU in the discovery window or the polling period, allocates uplink resources to the FCU through the GATE message, and then uses the FCU to pass the physical frame of the coaxial domain as CNU. Allocate uplink resources.
  • the boundary of the discovery window or the polling period is not aligned with the physical frame boundary of the coaxial domain, and the physical frame boundary of the coaxial domain is random, so that the FCU cannot receive the GATE message after the arrival. Perform, which increases latency and jitter, which ultimately affects quality of service (Quality of Service, QoS).
  • the embodiment of the present invention provides a method for adjusting a physical frame boundary, a related device, and a system, which are used to solve the problem of affecting QoS caused by the misalignment between the boundary of the window or the polling period and the physical frame boundary of the coaxial domain in the prior art. .
  • a method for adjusting a physical frame boundary including:
  • the authorization message carrying adjustment time amount information for a boundary of a physical frame of the coaxial domain, where the discovery window and the polling period are An integer multiple of the period of the physical frame of the coaxial domain;
  • the adjusting time amount information includes a time difference offset and a timestamp of the OLT sending the authorization message
  • the boundary of the physical frame of the coaxial domain is aligned with the boundary of the discovery window or the polling period, and the physical frame is sent according to the boundary of the physical frame of the coaxial domain, which includes:
  • the physical frame is transmitted when the current time of the local clock reaches the boundary of the adjusted physical frame of the coaxial domain.
  • the adjusting the time amount information includes a preset boundary of the physical frame and a timestamp of the OLT sending the authorization message;
  • the boundary of the physical frame of the coaxial domain is aligned with the boundary of the discovery window or the polling period, and the physical frame is sent according to the boundary of the physical frame of the coaxial domain, which includes:
  • the physical frame is transmitted when the current time of the local clock reaches the boundary of the adjusted physical frame of the coaxial domain.
  • the time difference offset includes one or a combination of the following:
  • a method for adjusting a physical frame boundary including: receiving an authorization message sent by an optical line terminal OLT in a discovery window or a polling period, where the discovery window and the polling period are coaxial An integer multiple of the period of the physical frame of the domain;
  • adjusting a boundary of a physical frame of the coaxial domain according to a time when the authorization message is received and a period of a physical frame of the coaxial domain Discover the boundary alignment of the window or polling cycle, including:
  • the authorization message carries a time difference offset amount
  • the boundary of the physical frame of the coaxial domain is aligned with the boundary of the discovery window or the polling period, and specifically includes:
  • the time difference offset includes one or a combination of the following:
  • the OLT sends a downlink transmission delay of the authorization message.
  • a third aspect provides a method for adjusting a physical frame boundary, where the method includes: setting a discovery window and a polling period to be an integer multiple of a period of a physical frame of a coaxial domain;
  • the authorization message is sent to the media conversion device in the set discovery window or polling cycle.
  • the authorization message carries adjustment time amount information for a boundary of a physical frame of a coaxial domain.
  • the adjusting the time amount information includes a time difference offset and a timestamp for sending the authorization message; or Set the boundary and the timestamp.
  • the time difference offset includes one or a combination of the following:
  • a medium conversion device including:
  • a transceiver configured to receive an authorization message sent by the optical line terminal OLT in a discovery window or a polling period, where the authorization message carries adjustment time amount information for a boundary of a physical frame of the coaxial domain, the discovery window and the The polling period is an integer multiple of the period of the physical frame of the coaxial domain;
  • a processor configured to adjust, according to the adjusted time amount information and a period of a physical frame of the coaxial domain, a boundary of a physical frame of the coaxial domain to be aligned with a boundary of the discovery window or a polling period, and notify The transceiver transmits the physical frame according to the adjusted boundary of the physical frame of the coaxial domain.
  • the adjusting time amount information includes a time difference offset and a timestamp of the OLT sending the authorization message;
  • the processor is specifically configured to:
  • the transceiver is notified to send a physical frame.
  • the adjusting the time amount information includes a preset boundary of the physical frame and a timestamp of the OLT sending the authorization message;
  • the processor is specifically configured to:
  • the transceiver is notified to send a physical frame.
  • the time difference offset includes one or a combination of the following:
  • a medium conversion device including:
  • a transceiver configured to receive an authorization message sent by the optical line terminal OLT in a discovery window or a polling period, where the discovery window and the polling period are integer multiples of a period of a physical frame of the coaxial domain;
  • a processor configured to adjust, according to a time of receiving the authorization message and a period of a physical frame of the coaxial domain, a boundary of a physical frame of the coaxial domain to be aligned with a boundary of the discovery window or a polling period, And notifying the transceiver to send the physical frame according to the adjusted boundary of the physical frame of the coaxial domain.
  • the processor is specifically configured to: Adding an integer multiple of the period of the physical frame of the coaxial domain to the time of receiving the authorization message as the boundary of the adjusted physical frame of the coaxial domain.
  • the authorization message carries a time difference offset
  • the processor is specifically configured to:
  • the time difference offset includes one or a combination of the following:
  • the OLT sends a downlink transmission delay of the authorization message.
  • an optical line terminal including:
  • a processor configured to set the discovery window and the polling period to be an integer multiple of a period of a physical frame of the coaxial domain; and the transceiver, configured to send an authorization message to the media conversion device in the set discovery window or the polling period.
  • the authorization message carries adjustment time amount information for a boundary of a physical frame of a coaxial domain.
  • the adjusting time amount information includes a time difference offset and a timestamp for sending the authorization message; or a pre-frame including a physical frame Set the boundary and the timestamp.
  • the time difference offset includes one or a combination of the following:
  • an adjustment system for a physical frame boundary which is characterized in that it includes a fourth aspect, A medium conversion device according to any one of the first possible implementation of the fourth aspect, the second possible implementation of the fourth aspect, and the third possible implementation of the fourth aspect, the sixth aspect, the The optical line terminal OLT, and the coaxial domain terminal described in the first possible implementation manner of the sixth aspect, the second possible implementation manner of the sixth aspect, and the third possible implementation manner of the sixth aspect; or
  • the media conversion device according to the fifth aspect, the first possible implementation manner of the fifth aspect, the second possible implementation manner of the fifth aspect, and the third possible implementation manner of the fifth aspect, the sixth The OLT, and the coaxial domain terminal according to any one of the first possible implementation manner of the sixth aspect, the second possible implementation manner of the sixth aspect, and the third possible implementation manner of the sixth aspect .
  • the method for adjusting a physical frame boundary according to the first aspect, the method for adjusting a physical frame boundary provided by the third aspect, the medium conversion device provided by the fourth aspect, the optical line terminal provided by the sixth aspect, or the physical frame provided by the seventh aspect The boundary adjustment system, the OLT terminal sends an authorization message in the discovery window or the polling period, and the discovery window and the polling period are integer multiples of the period of the physical frame of the coaxial domain. After receiving the authorization message, the media conversion device may according to the authorization message.
  • the adjustment time amount information and the period of the physical frame of the coaxial domain adjust the boundary of the physical frame of the coaxial domain to be aligned with the boundary of the transmission window or the polling period, and need not wait until the next frame period, and can be sent in time in the current frame period.
  • the physical frame allocates uplink resources to the CNU or forwards the allocated uplink resources. This reduces delay and jitter and ultimately improves QoS.
  • the method for adjusting a physical frame boundary according to the second aspect, the method for adjusting a physical frame boundary provided by the third aspect, the medium conversion device provided by the fifth aspect, the optical line terminal provided by the sixth aspect, or the physical frame provided by the seventh aspect The boundary adjustment system, the OLT terminal sends an authorization message in the discovery window or the polling period, and the discovery window and the polling period are integer multiples of the period of the physical frame of the coaxial domain.
  • the media conversion device may receive the The time of the authorization message and the period of the physical frame of the coaxial domain adjust the boundary of the physical frame of the coaxial domain to be aligned with the boundary of the transmission window or the polling period, without waiting for the next frame period, the physical frame can be sent in time in the current frame period. , allocate uplink resources to the CNU or forward the allocated uplink resources, which reduces delay and jitter, and ultimately improves QoS. DRAWINGS
  • 1 is a schematic structural view of an EPOC system in the background art of the present invention
  • 2 is a flowchart of a method for adjusting a first physical frame boundary when an execution body is a media conversion device according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a format of a GATE message according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for adjusting a first physical frame boundary when an execution subject is an OLT according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a method for adjusting a first physical frame boundary according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a second physical frame boundary adjustment method when a main body is a media conversion device according to an embodiment of the present invention
  • FIG. 7 is a flowchart of a method for adjusting a second physical frame boundary when an execution subject is an OLT according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a second embodiment of a physical frame boundary adjustment method according to an embodiment of the present invention
  • FIG. 9 is a schematic structural diagram of a physical frame boundary adjustment apparatus corresponding to a first physical frame boundary adjustment method according to an embodiment of the present invention
  • FIG. 10 is a schematic structural diagram of a media conversion device corresponding to a method for adjusting a first physical frame boundary according to an embodiment of the present disclosure
  • FIG. 11 is a schematic structural diagram of a device for adjusting a preferred physical frame boundary corresponding to a method for adjusting a physical frame boundary according to an embodiment of the present disclosure
  • FIG. 12 is a schematic structural diagram of an OLT corresponding to a method for adjusting a physical frame boundary according to an embodiment of the present invention
  • FIG. 13 is a schematic structural diagram of a device for adjusting a physical frame boundary corresponding to a method for adjusting a second physical frame boundary according to an embodiment of the present disclosure
  • FIG. 14 is a schematic structural diagram of a medium conversion device corresponding to a method for adjusting a second physical frame boundary according to an embodiment of the present invention
  • FIG. 15 is a schematic structural diagram of a device for adjusting a physical frame boundary corresponding to a method for adjusting a second physical frame boundary according to an embodiment of the present invention
  • FIG. 16 is a schematic structural diagram of an OLT corresponding to a method for adjusting a second physical frame boundary according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention provides a method for adjusting two physical frame boundaries, as shown in FIG. 1 , in view of the problem of affecting QoS caused by the mismatch between the boundary of the discovery window or the polling period and the physical frame boundary of the coaxial domain.
  • the medium conversion device can perform the adjustment method of the physical frame boundary after the OLT registers or has completed registration. The adjustment methods of the two physical frame boundaries are described in detail below.
  • the flow of the first method is as shown in FIG. 2, and the following steps are specifically performed:
  • S20 Receive an authorization message sent by the OLT in a discovery window or a polling period, where the authorization message carries the adjustment time amount information of the boundary of the physical frame used in the coaxial domain, and the discovery window and the polling period are periods of the physical frame of the coaxial domain. Integer multiple.
  • the OLT sets the discovery window and the polling period to an integer multiple of the period of the physical frame of the coaxial domain, and may send an authorization message to the media conversion device in the discovery window or the polling period, and the authorization message may be a GATE message or an OAM message, and the like.
  • S21 Adjust the boundary of the physical frame of the coaxial domain to be aligned with the boundary of the discovery window or the polling period according to the adjustment time amount information and the period of the physical frame of the coaxial domain, and follow the boundary of the physical frame of the adjusted coaxial domain. Send a physical frame.
  • the medium conversion device can adjust the boundary of the physical frame of the coaxial domain to the boundary of the discovery window or the polling period according to the adjusted time amount information carried in the authorization message and the period of the physical frame of the coaxial domain, and then according to the adjusted same
  • the physical frame is sent at the boundary of the physical frame of the axis domain.
  • the physical frame boundary of the coaxial domain can be either absolutely aligned or aligned relative to the boundary of the transmit window or polling cycle. When absolutely aligned, there is no time difference between the two; when relative alignment, there is a certain time difference between the two.
  • the OLT terminal sends an authorization message in the discovery window or the polling period, and the discovery window and the polling period are integer multiples of the period of the physical frame of the coaxial domain.
  • the media conversion device may The adjustment time amount information in the weight message and the period of the physical frame of the coaxial domain adjust the boundary of the physical frame of the coaxial domain to be aligned with the boundary of the transmission window or the polling period, without waiting for the next frame period, in the current frame period Send physical frames in time, allocate uplink resources to the CNU, or forward the allocated uplink resources. This reduces delay and jitter and ultimately improves QoS.
  • the adjustment time amount information includes a time difference offset and a timestamp of the OLT sending the authorization message, and the boundary of the physical frame of the adjusted coaxial domain in the above S21 is aligned with the boundary of the discovery window or the polling period, and is adjusted according to the adjusted
  • the physical frame of the coaxial domain is sent to the physical frame, and the specific time includes: the time represented by the timestamp as the current time of the local clock; and the integer multiple of the period of the physical frame of the coaxial domain plus the timestamp and the time difference offset, The boundary of the physical frame of the adjusted coaxial domain; when the current time of the local clock reaches the boundary of the physical frame of the adjusted coaxial domain, the physical frame is transmitted.
  • the adjustment time amount information carried by the GATE message may include a timestamp and a time difference offset, as shown in FIG. 3 as a schematic diagram of the GATE message format.
  • the media conversion device can set the time represented by the time stamp to the current time of the local clock, and then add the timestamp and the time difference offset to the integer multiple of the period of the physical frame of the coaxial domain to obtain the adjusted coaxial domain.
  • the time difference offset can be zero, positive or negative.
  • timestamp t0 122ms
  • period of physical frame of coaxial domain T 31250ms
  • time difference offset tl -100
  • the adjustment time amount information includes a preset boundary of the physical frame and a timestamp of the OLT sending the authorization message, and the boundary of the physical frame of the adjusted coaxial domain in the above S21 is aligned with the boundary of the discovery window or the polling period, and is adjusted according to the adjustment.
  • the physical frame of the physical frame of the subsequent coaxial domain is sent, and the specific frame includes: the time represented by the timestamp as the current time of the local clock; and the integer multiple of the period of the physical frame of the coaxial domain is added to the preset boundary of the physical frame, The boundary of the physical frame as the adjusted coaxial domain; when the current time of the local clock reaches the boundary of the physical frame of the adjusted coaxial domain, the physical frame is transmitted.
  • the OLT can preset boundaries for the physical frames of the coaxial domain and send them to the media conversion device.
  • the medium conversion device may Setting the time represented by the timestamp to the current time of the local clock, and then adding an integer multiple of the period of the physical frame of the coaxial domain to the preset boundary of the physical frame, the boundary of the physical frame of the coaxial domain can be obtained.
  • the time difference offset may include one or a combination of the following three types:
  • the downlink transmission delay of the OLT sending the authorization message can be measured during ranging.
  • the ranging technology is prior art and will not be described here.
  • S40 Set the discovery window and the polling period to be an integer multiple of the period of the physical frame of the coaxial domain.
  • S41 Send an authorization message to the media conversion device in the set discovery window or the polling period, and the authorization message carries the adjustment time amount information of the boundary of the physical frame for the coaxial domain.
  • the foregoing adjustment time amount information includes a time difference offset and a time stamp of sending an authorization message; or includes a preset boundary and a time stamp of the physical frame.
  • the time difference offset includes the following one or a combination:
  • S50 The media conversion device completes registration at the OLT.
  • the OLT sets the discovery window and the polling period to an integer multiple of the period of the physical frame of the coaxial domain.
  • the OLT sends a GATE message to the media conversion device at the beginning of the discovery window, GATE The message carries a timestamp and time difference offset for aligning the boundary of the discovery window with the boundary of the physical frame of the coaxial domain.
  • the GATE message carries a timestamp and time difference offset for aligning the boundary of the polling period with the physical frame boundary of the coaxial domain. the amount.
  • the media conversion device uses the time represented by the timestamp as the current time of the local clock, and adds an integer multiple of the period of the physical frame of the coaxial domain to the timestamp and the time difference offset as the physical frame of the adjusted coaxial domain. boundary.
  • the current time of the local clock is set to 122ms, and the boundary of the adjusted physical frame is 31250a+122.
  • the boundary of the next physical frame is 31250+. 122ms.
  • the media conversion device sends a physical frame to the CNU when the current time of the local clock reaches the boundary of the adjusted physical frame of the coaxial domain.
  • the embodiment of the present invention provides a method for adjusting a second physical frame boundary.
  • the execution body is a media conversion device
  • the process of the method is as shown in FIG. 6, and the following steps are specifically performed:
  • S60 Receive an authorization authorization message sent by the OLT in a discovery window or a polling period, and find that the window and the polling period are integer multiples of a period of a physical frame of the coaxial domain.
  • the authorization message sent by the OLT does not carry the adjustment time amount information.
  • S61 Align the boundary of the physical frame of the coaxial domain with the boundary of the discovery window or the polling period according to the time of receiving the authorization message and the period of the physical frame of the coaxial domain, and follow the adjusted physical frame of the coaxial domain.
  • the boundary sends a physical frame.
  • the media conversion device adjusts the boundary of the physical frame of the coaxial domain and the discovery window or the polling period according to the time of receiving the authorization message and the period of the physical frame of the coaxial domain.
  • the boundaries are aligned, and then the physical frame is sent along the boundary of the physical frame of the adjusted coaxial domain.
  • the physical frame boundary of the coaxial domain may be absolutely aligned with the boundary of the transmit window or the polling cycle, or may be relatively aligned. In absolute alignment, there is no time difference between the two; when relative alignment, there is a certain time difference between the two.
  • the OLT sends an authorization message in the discovery window or the polling period, and the discovery window and the polling period are integer multiples of the period of the physical frame of the coaxial domain.
  • the media conversion device may receive the authorization message according to the time and the same time.
  • the period of the physical frame of the axis domain adjusts the boundary of the physical frame of the coaxial domain to be aligned with the boundary of the transmission window or the polling period. It is not necessary to wait until the next frame period, and the physical frame can be sent in the current frame period to allocate uplink resources for the CNU. Or forward the allocated uplink resources, which reduces latency and jitter, and ultimately improves QoS.
  • the boundary of the physical frame of the coaxial domain is aligned with the boundary of the discovery window or the polling period, and specifically includes: The integer multiple of the period of the physical frame of the domain plus the time of receiving the grant message as the boundary of the physical frame of the adjusted coaxial domain.
  • the authorization message carries the time difference offset
  • the boundary of the physical frame of the adjusted coaxial domain in the foregoing S61 is aligned with the boundary of the discovery window or the polling period, and specifically includes: adding an integer multiple of the period of the physical frame of the coaxial domain
  • the time and time difference offset of the received authorization message is taken as the boundary of the physical frame of the adjusted coaxial domain.
  • the time of the local clock reaches the boundary of the physical frame of the coaxial domain, the physical frame of the coaxial domain can be transmitted.
  • time difference offset includes one or a combination of the following two conditions:
  • the downlink transmission delay of the OLT sending the authorization message can be measured using a ranging technique.
  • S70 Set the discovery window and the polling period to be an integer multiple of the period of the physical frame of the coaxial domain.
  • S71 Send an authorization message to the media conversion device in the set discovery window or polling period.
  • the foregoing authorization message carries a time difference offset, and may include one or a combination of the following: a difference between a time when the authorization message is sent and a boundary of the discovery window or the polling period;
  • the downlink transmission delay of sending an authorization message is the downlink transmission delay of sending an authorization message.
  • S80 The media conversion device completes registration at the OLT.
  • S81 The OLT sets the discovery window and the polling period to an integral multiple of the period of the physical frame of the coaxial domain.
  • the OLT sends a GATE message to the media conversion device in the discovery window, and the GATE message carries a time difference offset.
  • the media conversion device adds an integer multiple of the period of the physical frame of the coaxial domain to the offset of the GATE cancellation, packet, and time difference, as the boundary of the physical frame of the adjusted coaxial domain.
  • the boundary of the adjusted physical frame is 31250b+122-100.
  • the boundary of the next physical frame is 31250+22ms.
  • the media conversion device sends a physical frame to the CNU when the current time of the local clock reaches the boundary of the adjusted physical frame of the coaxial domain.
  • an apparatus for adjusting a physical frame boundary is provided.
  • the embodiment of the present invention provides a physical frame boundary adjustment apparatus.
  • the structure of the apparatus is as shown in FIG. 9, and includes:
  • the receiving module 90 is configured to receive an authorization message sent by the OLT in the discovery window or the polling period, where the authorization message carries the adjustment time amount information of the boundary of the physical frame used in the coaxial domain, and the discovery window and the polling period are coaxial domains. An integer multiple of the period of the physical frame.
  • the adjusting module 91 is configured to adjust the same according to the adjustment time amount information and the period of the physical frame of the coaxial domain
  • the boundary of the physical frame of the axis domain is aligned with the boundary of the discovery window or the polling period, and the physical frame is transmitted according to the boundary of the physical frame of the adjusted coaxial domain.
  • the adjustment time amount information includes a time difference offset and a time stamp of the OLT sending the authorization message.
  • the above adjustment module 91 is specifically configured to:
  • the time represented by the time stamp is taken as the current time of the local clock
  • a physical frame is transmitted when the current time of the local clock reaches the boundary of the physical frame of the adjusted coaxial domain.
  • the adjustment time amount information includes a preset boundary of the physical frame and a time stamp of the OLT sending the authorization message.
  • the above adjustment module 91 is specifically configured to:
  • the time represented by the time stamp is taken as the current time of the local clock
  • a physical frame is transmitted when the current time of the local clock reaches the boundary of the physical frame of the adjusted coaxial domain.
  • the time difference offset includes one or a combination of the following:
  • the embodiment of the present invention provides a medium conversion device.
  • the structure of the device is as shown in FIG. 10, and includes:
  • the transceiver 100 is configured to receive an authorization message sent by the OLT in a discovery window or a polling period, where the authorization message carries an adjustment time amount information for a boundary of a physical frame of the coaxial domain, where the discovery window and the polling period are coaxial domains. An integer multiple of the period of the physical frame.
  • the processor 101 is configured to adjust the coaxial according to the adjusted time amount information and the period of the physical frame of the coaxial domain.
  • the boundary of the physical frame of the domain is aligned with the boundary of the discovery window or the polling period, and the transceiver 100 is notified to transmit the physical frame according to the boundary of the physical frame of the adjusted coaxial domain.
  • the transceiver 100 is coupled to the processor 101 via a bus.
  • the adjustment time amount information includes a time difference offset and a time stamp of the OLT sending the authorization message.
  • the processor 101 is specifically configured to:
  • the time represented by the time stamp is taken as the current time of the local clock
  • the transceiver 100 When the current time of the local clock reaches the boundary of the physical frame of the adjusted coaxial domain, the transceiver 100 is notified to transmit the physical frame.
  • the adjustment time amount information includes a preset boundary of the physical frame and a time stamp of the OLT sending the authorization message.
  • the processor 101 is specifically configured to:
  • the time represented by the time stamp is taken as the current time of the local clock
  • the transceiver When the current time of the local clock reaches the boundary of the physical frame of the adjusted coaxial domain, the transceiver is notified to send the physical frame.
  • the time difference offset includes one or a combination of the following:
  • an embodiment of the present invention provides a device for adjusting a physical frame boundary.
  • the structure of the device is as shown in FIG.
  • the setting module 110 is configured to set the discovery window and the polling period to be an integral multiple of the period of the physical frame of the coaxial domain.
  • the sending module 111 is configured to send the notification to the media conversion device in the set discovery window or the polling period.
  • the rights message, the authorization message carries the adjustment time amount information for the boundary of the coaxial domain.
  • the adjustment time amount information includes a time difference offset and a time stamp of sending the authorization message; or includes a preset boundary and a time stamp of the physical frame.
  • the time difference offset includes the following one or a combination:
  • an embodiment of the present invention provides an OLT.
  • the structure of the terminal is as shown in FIG. 12, and includes:
  • the processor 120 is configured to set the discovery window and the polling period to be an integer multiple of a period of a physical frame of the coaxial domain.
  • the transceiver 121 is configured to send an authorization message to the media conversion device in the set discovery window or the polling period, where the authorization message carries the adjustment time amount information for the boundary of the coaxial domain.
  • the processor 120 is coupled to the transceiver 121 via a bus.
  • the adjustment time amount information includes a time difference offset and a time stamp of sending the authorization message; or includes a preset boundary and a time stamp of the physical frame.
  • the time difference offset includes the following one or a combination:
  • the embodiment of the present invention provides a device for adjusting the physical frame boundary.
  • the structure of the device is as shown in FIG.
  • the receiving module 130 is configured to receive an authorization message sent by the OLT in a discovery window or a polling period, where the discovery window and the polling period are integer multiples of a period of a physical frame of the coaxial domain.
  • the adjusting module 131 is configured to adjust the boundary of the physical frame of the coaxial domain to the boundary of the discovery window or the polling period according to the time of receiving the authorization message and the period of the physical frame of the coaxial domain, and according to the adjusted coaxial The physical frame is sent at the boundary of the physical frame of the domain.
  • the foregoing adjusting module 131 is specifically configured to:
  • the integer multiple of the period of the physical frame of the coaxial domain is added to the time of receiving the grant message as the boundary of the physical frame of the adjusted coaxial domain.
  • the authorization message carries a time difference offset.
  • the foregoing adjustment module 131 is specifically configured to:
  • the integer multiple of the period of the physical frame of the coaxial domain is added to the time and time difference offset of the received grant message as the boundary of the physical frame of the adjusted coaxial domain.
  • the time difference offset includes one or a combination of the following:
  • the downlink transmission delay of the OLT sending the authorization message is the downlink transmission delay of the OLT sending the authorization message.
  • the embodiment of the present invention provides a medium conversion device.
  • the structure of the device is as shown in FIG.
  • the transceiver 140 is configured to receive an authorization message sent by the OLT in a discovery window or a polling period, where the discovery window and the polling period are integer multiples of a period of a physical frame of the coaxial domain.
  • the processor 141 is configured to adjust a boundary between a physical frame of the coaxial domain and a boundary of the discovery window or the polling period according to the time of receiving the authorization message and the period of the physical frame of the coaxial domain, and notify the transceiver 140 to adjust according to the adjustment.
  • the physical frame is sent at the boundary of the physical frame of the subsequent coaxial domain.
  • the transceiver 140 and the processor 141 are connected by a bus.
  • the foregoing processor 141 is specifically configured to:
  • the integer multiple of the period of the physical frame of the coaxial domain is added to the time of receiving the grant message as the boundary of the physical frame of the adjusted coaxial domain.
  • the authorization message carries a time difference offset.
  • the processor 141 is specifically configured to:
  • the integer multiple of the period of the physical frame of the coaxial domain is added to the time and time difference offset of the received grant message as the boundary of the physical frame of the adjusted coaxial domain.
  • the time difference offset includes one or a combination of the following:
  • the embodiment of the present invention provides a device for adjusting the physical frame boundary.
  • the structure of the device is as shown in FIG.
  • the setting module 150 is configured to set the discovery window and the polling period to be an integral multiple of the period of the physical frame of the coaxial domain.
  • the sending module 151 is configured to send an authorization message to the media conversion device in the set discovery window or the polling period.
  • the foregoing authorization message carries a time difference offset.
  • the time difference offset includes the following one or a combination:
  • the downlink transmission delay of sending an authorization message is the downlink transmission delay of sending an authorization message.
  • an embodiment of the present invention provides an OLT for the method for adjusting the boundary of the second physical frame.
  • the structure of the terminal is as shown in FIG.
  • the processor 160 is configured to set the discovery window and the polling period to be an integer multiple of the period of the physical frame of the coaxial domain.
  • the transceiver 161 is configured to send an authorization message to the media conversion device in the set discovery window or the polling period.
  • the processor 160 and the transceiver 161 are connected by a bus.
  • the foregoing authorization message carries a time difference offset.
  • the time difference offset includes the following one or a combination:
  • the downlink transmission delay of sending an authorization message is the downlink transmission delay of sending an authorization message.
  • an embodiment of the present invention provides an adjustment system for a physical frame boundary, including a media conversion device as shown in FIG. 10, an optical line terminal OLT and a coaxial domain terminal as shown in FIG. 12;
  • embodiments of the present invention can be provided as a method, system, or computer program product.
  • the present invention can be implemented in an entirely hardware embodiment, an entirely software embodiment, or a In the form of an embodiment of the software and hardware aspects.
  • the present invention is applicable to one or more computer usable storage media (including but not limited to disk storage, including computer usable program code,
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

一种物理帧边界的调整方法、相关设备及系统,该方法包括:接收光线路终端OLT在发现窗口或轮询周期发送的授权消息,所述授权消息携带用于同轴域的物理帧的边界的调整时间量信息,所述发现窗口和所述轮询周期是所述同轴域的物理帧的周期的整数倍;根据所述调整时间量信息和所述同轴域的物理帧的周期,调整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐,并按照调整后的所述同轴域的物理帧的边界发送物理帧。该方案减少了延时和抖动,最终周QoS。

Description

一种物理帧边界的调整方法、 相关设备及系统
技术领域
本发明涉及通信技术领域, 尤其涉及一种物理帧边界的调整方法、 相关设 备及系统。 背景技术
将成熟的以太网无源光网络( Ethernet Passive Optical Network , EPON )技 术和协议引入同轴域中可得到基于同轴电缆的以太网无源光网络 ( EPON Protocol Over Coax , EPOC ) , 在同轴域的媒介接入控制 ( Media Access Control , MAC )层以上釆用 EPON协议, 可实现端到端的管理, 如图 1所示的 EPOC系统 架构中, 光线路终端(Optical Line Terminal, OLT ) 1与媒介转换设备 2之间通过 光纤连接, 媒介转换设备 2与同轴网络单元(Coaxial Network Unit, CNU ) 3之 间通过同轴电缆连接,媒介转换设备可以为光铜单元(Fiber Coaxial Unit, FCU )、 同轴媒介转换器( Coax Media Converter, CMC )等等设备, 图 1中示出的是 FCU, 为 FCU和 CNU分配上行资源的具体实现方式有两种:
第一种, OLT统一为 FCU和 CNU分配上行资源, OLT通过 GATE消息周期性 地在发现窗口或者轮询周期内向 FCU发送 GATE消息, 通过 GATE消息为 FCU和 源转发给 CNU。
第二种, OLT仅为 FCU分配上行资源, OLT周期性地在发现窗口或者轮询周 期内向 FCU发送 GATE消息, 通过 GATE消息为 FCU分配上行资源, 然后由 FCU 通过同轴域的物理帧为 CNU分配上行资源。
目前, 发现窗口或轮询周期的边界与同轴域的物理帧边界并不是对齐的, 同轴域的物理帧边界是随机的, 这样就导致 FCU接收到 GATE消息后, 不能在当 到后才能进行, 这样就增加了延时和抖动, 最终会影响服务质量 (Quality of Service , QoS )。 发明内容
本发明实施例提供一种物理帧边界的调整方法、 相关设备及系统, 用以解 决现有技术中发现窗口或轮询周期的边界与同轴域的物理帧边界不对齐导致的 影响 QoS的问题。
第一方面, 提供一种物理帧边界的调整方法, 包括:
接收光线路终端 0LT在发现窗口或轮询周期发送的授权消息, 所述授权消 息携带用于同轴域的物理帧的边界的调整时间量信息, 所述发现窗口和所述轮 询周期是所述同轴域的物理帧的周期的整数倍;
根据所述调整时间量信息和所述同轴域的物理帧的周期, 调整所述同轴域 的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并按照调整后的所述 同轴域的物理帧的边界发送物理帧。
结合第一方面, 在第一种可能的实现方式中, 所述调整时间量信息包括时 间差偏移量和所述 OLT发送所述授权消息的时间戳;
调整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并按照调整后的所述同轴域的物理帧的边界发送物理帧, 具体包括:
将所述时间戳代表的时间作为本地时钟的当前时间;
将所述同轴域的物理帧的周期的整数倍加上所述时间戳和所述时间差偏移 量, 作为调整后的所述同轴域的物理帧的边界;
当所述本地时钟的当前时间到达调整后的所述同轴域的物理帧的边界时, 发送物理帧。
结合第一方面, 在第二种可能的实现方式中, 所述调整时间量信息包括物 理帧的预设边界和所述 OLT发送所述授权消息的时间戳;
调整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并按照调整后的所述同轴域的物理帧的边界发送物理帧, 具体包括:
将所述时间戳代表的时间作为本地时钟的当前时间; 将所述同轴域的物理帧的周期的整数倍加上所述物理帧的预设边界, 作为 调整后的所述同轴域的物理帧的边界;
当所述本地时钟的当前时间到达调整后的所述同轴域的物理帧的边界时, 发送物理帧。
结合第一方面的第二种可能的实现方式, 在第三种可能的实现方式中,, 所 述时间差偏移量包括下列之一或组合:
所述 OLT发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差 值;
所述 OLT发送所述授权消息的下行传输时延;
所述物理帧的预设边界与所述发现窗口或轮询周期的边界的差值。
第二方面, 提供一种物理帧边界的调整方法, 其特征在于, 包括: 接收光线路终端 OLT在发现窗口或轮询周期发送的授权消息, 所述发现窗 口和所述轮询周期是同轴域的物理帧的周期的整数倍;
根据接收到所述授权消息的时间和所述同轴域的物理帧的周期, 调整所述 同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并按照调整后 的所述同轴域的物理帧的边界发送物理帧。
结合第二方面, 在第一种可能的实现方式中, 根据接收到所述授权消息的 时间和所述同轴域的物理帧的周期, 调整所述同轴域的物理帧的边界与所述发 现窗口或轮询周期的边界对齐, 具体包括:
将所述同轴域的物理帧的周期的整数倍加上接收到所述授权消息的时间, 作为调整后的所述同轴域的物理帧的边界。
结合第二方面, 在第二种可能的实现方式中, 所述授权消息携带时间差偏 移量;
调整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 具体包括:
将所述同轴域的物理帧的周期的整数倍加上接收到所述授权消息的时间和 所述时间差偏移量, 作为调整后的所述同轴域的物理帧的边界。 结合第二方面的第二中可能的实现方式, 在第三种可能的实现方式中, 其 特征在于, 所述时间差偏移量包括下列之一或组合:
所述 OLT发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差 值;
所述 OLT发送所述授权消息的下行传输时延。
第三方面, 提供一种物理帧边界的调整方法, 其特征在于, 包括: 设置发现窗口和轮询周期是同轴域的物理帧的周期的整数倍;
在设置后的所述发现窗口或轮询周期向媒介转换设备发送授权消息。
结合第三方面, 在第一种可能的实现方式中, 所述授权消息携带用于同轴 域的物理帧的边界的调整时间量信息。
结合第三方面的第一种可能的实现方式, 在第二种可能的实现方式中, 所 述调整时间量信息包括时间差偏移量和发送所述授权消息的时间戳; 或者包括 物理帧的预设边界和所述时间戳。
结合第三方面的第二种可能的实现方式, 在第三种可能的实现方式中, 所 述时间差偏移量包括下列之一或组合:
发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差值; 发送所述授权消息的下行传输时延;
所述物理帧的预设边界与所述发现窗口或轮询周期的边界的差值。
第四方面, 提供一种媒介转换设备, 其特征在于, 包括:
收发器,用于接收光线路终端 OLT在发现窗口或轮询周期发送的授权消息, 所述授权消息携带用于同轴域的物理帧的边界的调整时间量信息, 所述发现窗 口和所述轮询周期是所述同轴域的物理帧的周期的整数倍;
处理器, 用于根据所述调整时间量信息和所述同轴域的物理帧的周期, 调 整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并通知 所述收发器按照调整后的所述同轴域的物理帧的边界发送物理帧。
结合第四方面, 在第一种可能的实现方式中, 所述调整时间量信息包括时 间差偏移量和所述 OLT发送所述授权消息的时间戳; 所述处理器, 具体用于:
将所述时间戳代表的时间作为本地时钟的当前时间;
将所述同轴域的物理帧的周期的整数倍加上所述时间戳和所述时间差偏移 量, 作为调整后的所述同轴域的物理帧的边界;
当所述本地时钟的当前时间到达调整后的所述同轴域的物理帧的边界时, 通知所述收发器发送物理帧。
结合第四方面, 在第二种可能的实现方式中, 所述调整时间量信息包括物 理帧的预设边界和所述 OLT发送所述授权消息的时间戳;
所述处理器, 具体用于:
将所述时间戳代表的时间作为本地时钟的当前时间;
将所述同轴域的物理帧的周期的整数倍加上所述物理帧的预设边界, 作为 调整后的所述同轴域的物理帧的边界;
当所述本地时钟的当前时间到达调整后的所述同轴域的物理帧的边界时, 通知所述收发器发送物理帧。
结合第四方面的第二种可能的实现方式, 在第三种可能的实现方式中, 所 述时间差偏移量包括下列之一或组合:
所述 OLT发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差 值;
所述 OLT发送所述授权消息的下行传输时延;
所述物理帧的预设边界与所述发现窗口或轮询周期的边界的差值。
第五方面, 提供一种媒介转换设备, 其特征在于, 包括:
收发器,用于接收光线路终端 OLT在发现窗口或轮询周期发送的授权消息, 所述发现窗口和所述轮询周期是同轴域的物理帧的周期的整数倍;
处理器, 用于根据接收到所述授权消息的时间和所述同轴域的物理帧的周 期, 调整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并通知所述收发器按照调整后的所述同轴域的物理帧的边界发送物理帧。
结合第五方面, 在第一种可能的实现方式中, 所述处理器, 具体用于: 将所述同轴域的物理帧的周期的整数倍加上接收到所述授权消息的时间, 作为调整后的所述同轴域的物理帧的边界。
结合第五方面, 在第二种可能的实现方式中, 所述授权消息携带时间差偏 移量;
所述处理器, 具体用于:
将所述同轴域的物理帧的周期的整数倍加上接收到所述授权消息的时间和 所述时间差偏移量, 作为调整后的所述同轴域的物理帧的边界。
结合第五方面的第二种可能的实现方式, 在第三种可能的实现方式中, 所 述时间差偏移量包括下列之一或组合:
所述 OLT发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差 值;
所述 OLT发送所述授权消息的下行传输时延。
第六方面, 提供一种光线路终端, 其特征在于, 包括:
处理器, 用于设置发现窗口和轮询周期是同轴域的物理帧的周期的整数倍; 收发器, 用于在设置后的所述发现窗口或轮询周期向媒介转换设备发送授 权消息。
结合第六方面, 在第一种可能的实现方式中, 所述授权消息携带用于同轴 域的物理帧的边界的调整时间量信息。
结合第六方面的第一种可能的实现方式, 在第二种可能的实现方式中, 所 述调整时间量信息包括时间差偏移量和发送所述授权消息的时间戳; 或者包括 物理帧的预设边界和所述时间戳。
结合第六方面的第二种可能的实现方式, 在第三种可能的实现方式中, 所 述时间差偏移量包括下列之一或组合:
发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差值; 发送所述授权消息的下行传输时延;
所述物理帧的预设边界与所述发现窗口或轮询周期的边界的差值。
第七方面, 提供一种物理帧边界的调整系统, 其特征在于, 包括第四方面、 第四方面的第一种可能的实现方式、 第四方面的第二种可能的实现方式和第四 方面的第三种可能的实现方式中任一所述的媒介转换设备, 第六方面、 第六方 面的第一种可能的实现方式、 第六方面的第二种可能的实现方式和第六方面的 第三种可能的实现方式中所述的光线路终端 OLT, 和同轴域终端; 或者
包括第五方面、 第五方面的第一种可能的实现方式、 第五方面的第二种可 能的实现方式和第五方面的第三种可能的实现方式中所述的媒介转换设备, 第 六方面、 第六方面的第一种可能的实现方式、 第六方面的第二种可能的实现方 式和第六方面的第三种可能的实现方式中任一所述的 OLT, 和同轴域终端。
根据第一方面提供的物理帧边界的调整方法、 第三方面提供的物理帧边界 的调整方法、 第四方面提供的媒介转换设备、 第六方面提供的光线路终端或第 七方面提供的物理帧边界的调整系统, OLT 终端在发现窗口或轮询周期发送授 权消息, 发现窗口和轮询周期是同轴域的物理帧的周期的整数倍, 媒介转换设 备接收到授权消息后, 可以根据授权消息中的调整时间量信息和同轴域的物理 帧的周期调整同轴域的物理帧的边界与发送窗口或轮询周期的边界对齐, 无需 等到下个帧周期, 在当前帧周期就能及时发送物理帧, 为 CNU分配上行资源或 转发分配的上行资源, 这样就减少了延时和抖动, 最终提高 QoS。
根据第二方面提供的物理帧边界的调整方法、 第三方面提供的物理帧边界 的调整方法、 第五方面提供的媒介转换设备、 第六方面提供的光线路终端或第 七方面提供的物理帧边界的调整系统, OLT 终端在发现窗口或轮询周期发送授 权消息, 发现窗口和轮询周期是同轴域的物理帧的周期的整数倍, 媒介转换设 备接收到授权消息后, 可以根据接收到授权消息的时间和同轴域的物理帧的周 期调整同轴域的物理帧的边界与发送窗口或轮询周期的边界对齐, 无需等到下 个帧周期, 在当前帧周期就能及时发送物理帧, 为 CNU分配上行资源或转发分 配的上行资源, 这样就减少了延时和抖动, 最终提高 QoS。 附图说明
图 1为本发明背景技术中 EPOC系统的结构示意图; 图 2 为本发明实施例中执行主体为媒介转换设备时第一种物理帧边界的调 整方法的流程图;
图 3为本发明实施例中 GATE消息格式的示意图;
图 4为本发明实施例中当执行主体为 OLT时第一种物理帧边界的调整方法 的流程图;
图 5为本发明实施例中第一种物理帧边界的调整方法的优选实施例; 图 6 为本发明实施例中执行主体为媒介转换设备时第二种物理帧边界的调 整方法的流程图;
图 7为本发明实施例中当执行主体为 OLT时第二种物理帧边界的调整方法 的流程图;
图 8为本发明实施例中第二种物理帧边界的调整方法的优选实施例; 图 9为本发明实施例中第一种物理帧边界的调整方法对应的物理帧边界的 调整装置的结构示意图;
图 10为本发明实施例中第一种物理帧边界的调整方法对应的媒介转换设备 的结构示意图;
图 11为本发明实施例中第一种物理帧边界的调整方法对应的优选的物理帧 边界的调整装置的结构示意图;
图 12为本发明实施例中第一种物理帧边界的调整方法对应的 OLT的结构示 意图;
图 13为本发明实施例中第二种物理帧边界的调整方法对应的物理帧边界的 调整装置的结构示意图;
图 14为本发明实施例中第二种物理帧边界的调整方法对应的媒介转换设备 的结构示意图;
图 15为本发明实施例中第二种物理帧边界的调整方法对应的优选的物理帧 边界的调整装置的结构示意图;
图 16为本发明实施例中第二种物理帧边界的调整方法对应的 OLT的结构示 意图。 具体实施方式
针对现有技术中存在的发现窗口或轮询周期的边界与同轴域的物理帧边界 不对齐导致的影响 QoS的问题,本发明实施例提供两种物理帧边界的调整方法, 如图 1所示的 EPOC系统中, 媒介转换设备在 OLT进行注册或者已经完成注册 后, 都可以执行物理帧边界的调整方法, 下面详细介绍两种物理帧边界的调整 方法。
当执行主体为媒介转换设备时, 第一种方法的流程如图 2 所示, 具体执行 如下步骤:
S20:接收 OLT在发现窗口或轮询周期发送的授权消息,授权消息携带用于 同轴域的物理帧的边界的调整时间量信息, 发现窗口和轮询周期是同轴域的物 理帧的周期的整数倍。
OLT 将发现窗口和轮询周期设置为同轴域的物理帧的周期的整数倍, 可以 在发现窗口或者轮询周期向媒介转换设备发送授权消息,授权消息可以是 GATE 消息或者 OAM消息等等, 以下以授权消息为 GATE消息为例进行说明。
可以调整一次同轴域的物理帧的边界, 也可以调整多次, 每次调整的方法 都是相同的。
S21 : 根据调整时间量信息和同轴域的物理帧的周期, 调整同轴域的物理帧 的边界与发现窗口或轮询周期的边界对齐, 并按照调整后的同轴域的物理帧的 边界发送物理帧。
媒介转换设备可以根据授权消息中携带的调整时间量信息和同轴域的物理 帧的周期, 调整同轴域的物理帧的边界与发现窗口或轮询周期的边界对齐, 然 后按照调整后的同轴域的物理帧的边界发送物理帧。 同轴域的物理帧边界与发 送窗口或轮询周期的边界二者之间可以绝对对齐, 也可以相对对齐。 在绝对对 齐时, 二者之间没有时间差; 当相对对齐时, 二者之间有一定的时间差。
OLT 终端在发现窗口或轮询周期发送授权消息, 发现窗口和轮询周期是同 轴域的物理帧的周期的整数倍, 媒介转换设备接收到授权消息后, 可以根据授 权消息中的调整时间量信息和同轴域的物理帧的周期调整同轴域的物理帧的边 界与发送窗口或轮询周期的边界对齐, 无需等到下个帧周期, 在当前帧周期就 能及时发送物理帧, 为 CNU分配上行资源或转发分配的上行资源, 这样就减少 了延时和抖动, 最终提高 QoS。
具体的,调整时间量信息包括时间差偏移量和 OLT发送授权消息的时间戳, 上述 S21 中的调整同轴域的物理帧的边界与发现窗口或轮询周期的边界对齐, 并按照调整后的同轴域的物理帧的边界发送物理帧, 具体包括: 将时间戳代表 的时间作为本地时钟的当前时间; 将同轴域的物理帧的周期的整数倍加上时间 戳和时间差偏移量, 作为调整后的同轴域的物理帧的边界; 当本地时钟的当前 时间到达调整后的同轴域的物理帧的边界时, 发送物理帧。
GATE消息携带的调整时间量信息可以包括时间戳和时间差偏移量, 如图 3 所示为 GATE消息格式的示意图。 媒介转换设备可以将时间戳代表的时间设置 为本地时钟的当前时间, 然后将同轴域的物理帧的周期的整数倍加上时间戳和 时间差偏移量, 就可以得到调整后的同轴域的物理帧的边界。 时间差偏移量可 以为零、 正数或者负数。
例如: 时间戳 t0=122ms, 同轴域的物理帧的周期 T=31250ms, 时间差偏移 量 tl=-100 , 那 么 同 轴 域 的 物 理 帧 的 边 界 t0'=nT+t0+tl=31250n+122-100=31250n+22, n > 0。 当本地时钟的当前时间到达 同轴域的物理帧的边界时, 即可发送同轴域的物理帧。
具体的, 调整时间量信息包括物理帧的预设边界和 OLT发送授权消息的时 间戳, 上述 S21 中的调整同轴域的物理帧的边界与发现窗口或轮询周期的边界 对齐, 并按照调整后的同轴域的物理帧的边界发送物理帧, 具体包括: 将时间 戳代表的时间作为本地时钟的当前时间; 将同轴域的物理帧的周期的整数倍加 上物理帧的预设边界, 作为调整后的同轴域的物理帧的边界; 当本地时钟的当 前时间到达调整后的同轴域的物理帧的边界时, 发送物理帧。
OLT可以为同轴域的物理帧预设边界, 并将其发送给媒介转换设备。
当调整时间量信息包括物理帧的预设边界和时间戳时, 媒介转换设备可以 将时间戳代表的时间设置为本地时钟的当前时间, 然后将同轴域的物理帧的周 期的整数倍加上物理帧的预设边界, 就可以得到同轴域的物理帧的边界。 例如: 物理帧的预设边界 t2=122ms, 同轴域的物理帧的周期 T=31250ms, 那么同轴域 的物理帧的边界 t0'=mT+t2=31250m+122, m > 0。 当本地时钟的当前时间到达同 轴域的物理帧的边界时, 就可以发送同轴域的物理帧了。
具体的, 上述时间差偏移量可以包括下列三种之一或组合:
第一种, OLT发送授权消息的时间与发现窗口或轮询周期的边界的差值。 第二种, OLT发送授权消息的下行传输时延。 该下行传输时延可以在测距 时测得, 测距技术为现有技术, 在这里不再赘述。
第三种, 物理帧的预设边界与发现窗口或轮询周期的边界的差值。
当执行主体为 OLT时, 第一种方法的流程图如图 4所示, 具体执行步骤如 下:
S40: 设置发现窗口和轮询周期是同轴域的物理帧的周期的整数倍。
S41 : 在设置后的发现窗口或轮询周期向媒介转换设备发送授权消息, 授权 消息携带用于同轴域的物理帧的边界的调整时间量信息。
具体的, 上述调整时间量信息包括时间差偏移量和发送授权消息的时间戳; 或者包括物理帧的预设边界和时间戳。
具体的, 上述时间差偏移量包括下列之一或组合:
发送授权消息的时间与发现窗口或轮询周期的边界的差值;
发送授权消息的下行传输时延;
物理帧的预设边界与发现窗口或轮询周期的边界的差值。
下面以一个具体实施例说明第一种物理帧边界的调整方法, 如图 5 所示, 具体执行步骤如下:
S50: 媒介转换设备在 OLT完成注册。
S51 : OLT将发现窗口和轮询周期设置为同轴域的物理帧的周期的整数倍。 这里可以 4艮设发现窗口 =轮询周期=同轴域的物理帧的周期 =31250ms。
S52: OLT在发现窗口的起始位置向媒介转换设备发送 GATE消息, GATE 消息携带用于对齐发现窗口的边界与同轴域的物理帧的边界的时间戳和时间差 偏移量。
当然也可以在轮询周期内的任一时刻向媒介转换设备发送 GATE消息, 此 时, GATE消息中携带用于对齐轮询周期的边界与同轴域的物理帧边界的时间戳 和时间差偏移量。
S53: 媒介转换设备将时间戳代表的时间作为本地时钟的当前时间, 将同轴 域的物理帧的周期的整数倍加上时间戳和时间差偏移量, 作为调整后的同轴域 的物理帧的边界。
若时间戳为 122ms , 时间差偏移量为 0 , 则设置本地时钟的当前时间为 122ms, 调整后的物理帧的边界为 31250a+122, 当 a=l 时, 下一个物理帧的边 界为 31250+122ms。
S54: 媒介转换设备在本地时钟的当前时间到达调整后的同轴域的物理帧的 边界时, 向 CNU发送物理帧。
基于同一发明构思, 本发明实施例提供第二种物理帧边界的调整方法, 当 执行主体为媒介转换设备时, 方法的流程如图 6所示, 具体执行如下步骤:
S60:接收 OLT在发现窗口或轮询周期发送的授权授权消息,发现窗口和轮 询周期为同轴域的物理帧的周期的整数倍。
与第一种方法不同的是, OLT发送的授权消息中不携带调整时间量信息。
S61 : 根据接收到授权消息的时间和同轴域的物理帧的周期, 调整同轴域的 物理帧的边界与发现窗口或轮询周期的边界对齐, 并按照调整后的同轴域的物 理帧的边界发送物理帧。
与第一种方法不同的是, 媒介转换设备接收到授权消息后, 根据接收到授 权消息的时间和同轴域的物理帧的周期调整同轴域的物理帧的边界与发现窗口 或轮询周期的边界对齐, 然后按照调整后的同轴域的物理帧的边界发送物理帧。 同轴域的物理帧边界与发送窗口或轮询周期的边界二者之间可以绝对对齐, 也 可以相对对齐。 在绝对对齐时, 二者之间没有时间差; 当相对对齐时, 二者之 间有一定的时间差。 OLT 在发现窗口或轮询周期发送授权消息, 发现窗口和轮询周期是同轴域 的物理帧的周期的整数倍, 媒介转换设备接收到授权消息后, 可以根据接收到 授权消息的时间和同轴域的物理帧的周期调整同轴域的物理帧的边界与发送窗 口或轮询周期的边界对齐, 无需等到下个帧周期, 在当前帧周期就能及时发送 物理帧, 为 CNU分配上行资源或转发分配的上行资源, 这样就减少了延时和抖 动, 最终提高 QoS。
具体的, 上述 S61 中的根据接收到授权消息的时间和同轴域的物理帧的周 期, 调整同轴域的物理帧的边界与发现窗口或轮询周期的边界对齐, 具体包括: 将同轴域的物理帧的周期的整数倍加上接收到授权消息的时间, 作为调整后的 同轴域的物理帧的边界。
下面具体举例来说明调整同轴域的物理帧的边界的过程: 若同轴域的物理 帧的周期 T=31250ms, 接收到授权消息的时间 t3=150ms, 那么同轴域的物理帧 的边界 tO'=kT+t3=31250k+150, k > 0。 当本地时钟的时间到达同轴域的物理帧 的边界时, 即可发送同轴域的物理帧。
具体的, 授权消息携带时间差偏移量, 上述 S61 中的调整同轴域的物理帧 的边界与发现窗口或轮询周期的边界对齐, 具体包括: 将同轴域的物理帧的周 期的整数倍加上接收到授权消息的时间和时间差偏移量, 作为调整后的同轴域 的物理帧的边界。
如果授权消息携带时间差偏移量, 调整同轴域的物理帧的边界的过程: 若 同轴域的物理帧的周期 T=31250ms , 时间差偏移量 t4=-120ms, 那么同轴域的物 理帧的边界 tO'=qT+t4=31250q-120, q > 0。 当本地时钟的时间到达同轴域的物理 帧的边界时, 即可发送同轴域的物理帧。
具体的, 上述时间差偏移量包括下列两种情况之一或组合:
第一种, OLT发送授权消息的时间与发现窗口或轮询周期的边界的差值。 第二种, OLT发送授权消息的下行传输时延。 该下行传输时延可以使用测 距技术测得。
当执行主体为光线路终端时, 第二种物理帧边界的调整方法的流程如图 7 所示, 具体执行步骤如下:
S70: 设置发现窗口和轮询周期是同轴域的物理帧的周期的整数倍。
S71 : 在设置后的发现窗口或轮询周期向媒介转换设备发送授权消息。
具体的, 上述授权消息携带时间差偏移量, 可以包括下列之一或组合: 发送授权消息的时间与发现窗口或轮询周期的边界的差值;
发送授权消息的下行传输时延。
下面以一个具体实施例说明第二种物理帧边界的调整方法, 如图 8 所示, 具体执行步骤如下:
S80: 媒介转换设备在 OLT完成注册。
S81 : OLT将发现窗口和轮询周期设置为同轴域的物理帧的周期的整数倍。 这里可以 4艮设发现窗口 =轮询周期=同轴域的物理帧的周期 =31250ms。
S82: OLT在发现窗口向媒介转换设备发送 GATE消息, GATE消息携带时 间差偏移量。
当然也可以在轮询周期内的任一时刻向媒介转换设备发送 GATE消息, 此 时, GATE消息中携带时间差偏移量。
S83: 媒介转换设备将同轴域的物理帧的周期的整数倍加上接收到 GATE消 ,包、的时间和时间差偏移量, 作为调整后的同轴域的物理帧的边界。
若接收到 GATE消息的时间为 122ms, 时间差偏移量为 -100, 则调整后的物 理帧的边界为 31250b+122-100 ,当 b=l时,下一个物理帧的边界为 31250+22ms。
S84: 媒介转换设备在本地时钟的当前时间到达调整后的同轴域的物理帧的 边界时, 向 CNU发送物理帧。
基于同一发明构思, 对应第一种物理帧边界的调整方法, 本发明实施例提 供一种物理帧边界的调整装置, 该装置的结构如图 9所示, 包括:
接收模块 90, 用于接收 OLT在发现窗口或轮询周期发送的授权消息, 授权 消息携带用于同轴域的物理帧的边界的调整时间量信息, 发现窗口和轮询周期 是同轴域的物理帧的周期的整数倍。
调整模块 91 , 用于根据调整时间量信息和同轴域的物理帧的周期, 调整同 轴域的物理帧的边界与发现窗口或轮询周期的边界对齐, 并按照调整后的同轴 域的物理帧的边界发送物理帧。
具体的,调整时间量信息包括时间差偏移量和 OLT发送授权消息的时间戳。 上述调整模块 91 , 具体用于:
将时间戳代表的时间作为本地时钟的当前时间;
将同轴域的物理帧的周期的整数倍加上时间戳和时间差偏移量, 作为调整 后的同轴域的物理帧的边界;
当本地时钟的当前时间到达调整后的同轴域的物理帧的边界时, 发送物理 帧。
具体的, 调整时间量信息包括物理帧的预设边界和 OLT发送授权消息的时 间戳。
上述调整模块 91 , 具体用于:
将时间戳代表的时间作为本地时钟的当前时间;
将同轴域的物理帧的周期的整数倍加上物理帧的预设边界, 作为调整后的 同轴域的物理帧的边界;
当本地时钟的当前时间到达调整后的同轴域的物理帧的边界时, 发送物理 帧。
具体的, 时间差偏移量包括下列之一或组合:
OLT发送授权消息的时间与发现窗口或轮询周期的边界的差值;
OLT发送授权消息的下行传输时延;
物理帧的预设边界与发现窗口或轮询周期的边界的差值。
基于同一发明构思, 针对第一种物理帧边界的调整方法, 本发明实施例提 供一种媒介转换设备, 该设备的结构如图 10所示, 包括:
收发器 100, 用于接收 OLT在发现窗口或轮询周期发送的授权消息, 授权 消息携带用于同轴域的物理帧的边界的调整时间量信息, 发现窗口和轮询周期 是同轴域的物理帧的周期的整数倍。
处理器 101 , 用于根据调整时间量信息和同轴域的物理帧的周期, 调整同轴 域的物理帧的边界与发现窗口或轮询周期的边界对齐, 并通知收发器 100按照 调整后的同轴域的物理帧的边界发送物理帧。
收发器 100与处理器 101之间通过总线连接。
具体的,调整时间量信息包括时间差偏移量和 OLT发送授权消息的时间戳。 处理器 101 , 具体用于:
将时间戳代表的时间作为本地时钟的当前时间;
将同轴域的物理帧的周期的整数倍加上时间戳和时间差偏移量, 作为调整 后的同轴域的物理帧的边界;
当本地时钟的当前时间到达调整后的同轴域的物理帧的边界时, 通知收发 器 100发送物理帧。
具体的, 调整时间量信息包括物理帧的预设边界和 OLT发送授权消息的时 间戳。
处理器 101 , 具体用于:
将时间戳代表的时间作为本地时钟的当前时间;
将同轴域的物理帧的周期的整数倍加上物理帧的预设边界, 作为调整后的 同轴域的物理帧的边界;
当本地时钟的当前时间到达调整后的同轴域的物理帧的边界时, 通知收发 器发送物理帧。
具体的, 时间差偏移量包括下列之一或组合:
OLT发送授权消息的时间与发现窗口或轮询周期的边界的差值;
OLT发送授权消息的下行传输时延;
物理帧的预设边界与发现窗口或轮询周期的边界的差值。
基于同一发明构思, 针对第一种物理帧边界的调整方法, 本发明实施例提 供一种物理帧边界的调整装置, 该装置的结构如图 11所示, 包括:
设置模块 110,用于设置发现窗口和轮询周期是同轴域的物理帧的周期的整 数倍。
发送模块 111 ,用于在设置后的发现窗口或轮询周期向媒介转换设备发送授 权消息, 授权消息携带用于同轴域的边界的调整时间量信息。
具体的, 调整时间量信息包括时间差偏移量和发送授权消息的时间戳; 或 者包括物理帧的预设边界和时间戳。
具体的, 上述时间差偏移量包括下列之一或组合:
发送授权消息的时间与发现窗口或轮询周期的边界的差值;
发送授权消息的下行传输时延;
物理帧的预设边界与发现窗口或轮询周期的边界的差值。
基于同一发明构思, 针对第一种物理帧边界的调整方法, 本发明实施例提 供一种 OLT, 该终端的结构如图 12所示, 包括:
处理器 120,用于设置发现窗口和轮询周期是同轴域的物理帧的周期的整数 倍。
收发器 121 ,用于在设置后的发现窗口或轮询周期向媒介转换设备发送授权 消息, 授权消息携带用于同轴域的边界的调整时间量信息。
处理器 120与收发器 121之间通过总线连接。
具体的, 调整时间量信息包括时间差偏移量和发送授权消息的时间戳; 或 者包括物理帧的预设边界和时间戳。
具体的, 上述时间差偏移量包括下列之一或组合:
发送授权消息的时间与发现窗口或轮询周期的边界的差值;
发送授权消息的下行传输时延;
物理帧的预设边界与发现窗口或轮询周期的边界的差值。
基于同一发明构思, 针对第二种物理帧边界的调整方法, 本发明实施例提 供一种物理帧边界的调整装置, 该装置的结构如图 13所示, 包括:
接收模块 130, 用于接收 OLT在发现窗口或轮询周期发送的授权消息, 发 现窗口和轮询周期是同轴域的物理帧的周期的整数倍。
调整模块 131 , 用于根据接收到授权消息的时间和同轴域的物理帧的周期, 调整同轴域的物理帧的边界与发现窗口或轮询周期的边界对齐, 并按照调整后 的同轴域的物理帧的边界发送物理帧。 具体的, 上述调整模块 131 , 具体用于:
将同轴域的物理帧的周期的整数倍加上接收到授权消息的时间, 作为调整 后的同轴域的物理帧的边界。
具体的, 授权消息携带时间差偏移量。
上述调整模块 131 , 具体用于:
将同轴域的物理帧的周期的整数倍加上接收到授权消息的时间和时间差偏 移量, 作为调整后的同轴域的物理帧的边界。
具体的, 时间差偏移量包括下列之一或组合:
OLT发送授权消息的时间与发现窗口或轮询周期的边界的差值;
OLT发送授权消息的下行传输时延。
基于同一发明构思, 针对第二种物理帧边界的调整方法, 本发明实施例提 供一种媒介转换设备, 该设备的结构如图 14所示, 包括:
收发器 140, 用于接收 OLT在发现窗口或轮询周期发送的授权消息, 发现 窗口和轮询周期是同轴域的物理帧的周期的整数倍。
处理器 141 , 用于根据接收到授权消息的时间和同轴域的物理帧的周期, 调 整同轴域的物理帧的边界与发现窗口或轮询周期的边界对齐,并通知收发器 140 按照调整后的同轴域的物理帧的边界发送物理帧。
收发器 140和处理器 141之间通过总线连接。
具体的, 上述处理器 141 , 具体用于:
将同轴域的物理帧的周期的整数倍加上接收到授权消息的时间, 作为调整 后的同轴域的物理帧的边界。
具体的, 授权消息携带时间差偏移量。
上述处理器 141 , 具体用于:
将同轴域的物理帧的周期的整数倍加上接收到授权消息的时间和时间差偏 移量, 作为调整后的同轴域的物理帧的边界。
具体的, 时间差偏移量包括下列之一或组合:
OLT发送授权消息的时间与发现窗口或轮询周期的边界的差值; OLT发送授权消息的下行传输时延。
基于同一发明构思, 针对第二种物理帧边界的调整方法, 本发明实施例提 供一种物理帧边界的调整装置, 该装置的结构如图 15所示, 包括:
设置模块 150,用于设置发现窗口和轮询周期是同轴域的物理帧的周期的整 数倍。
发送模块 151 ,用于在设置后的发现窗口或轮询周期向媒介转换设备发送授 权消息。
具体的, 上述授权消息携带时间差偏移量。
具体的, 上述时间差偏移量包括下列之一或组合:
发送授权消息的时间与发现窗口或轮询周期的边界的差值;
发送授权消息的下行传输时延。
基于同一发明构思, 针对第二种物理帧边界的调整方法, 本发明实施例提 供一种 OLT, 该终端的结构如图 16所示, 包括:
处理器 160,用于设置发现窗口和轮询周期是同轴域的物理帧的周期的整数 倍。
收发器 161 ,用于在设置后的发现窗口或轮询周期向媒介转换设备发送授权 消息。
处理器 160和收发器 161之间通过总线连接。
具体的, 上述述授权消息携带时间差偏移量。
具体的, 上述时间差偏移量包括下列之一或组合:
发送授权消息的时间与发现窗口或轮询周期的边界的差值;
发送授权消息的下行传输时延。
基于同一发明构思, 本发明实施例提供一种物理帧边界的调整系统, 包括 如图 10所示的媒介转换设备、 如图 12所示的光线路终端 OLT和同轴域终端; 或者, 包括如图 14所示的媒介转换设备、 如图 16所示的 OLT和同轴域终端。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计 算机程序产品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结 合软件和硬件方面的实施例的形式。 而且, 本发明可釆用在一个或多个其中包 含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘存储器、
CD-ROM, 光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品 的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 / 或方框图中的每一流程和 /或方框、 以及流程图和 /或方框图中的流程和 /或 方框的结合。 可提供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式 处理机或其他可编程数据处理设备的处理器以产生一个机器, 使得通过计算机 或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流 程或多个流程和 /或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备 以特定方式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的 指令产生包括指令装置的制造品, 该指令装置实现在流程图一个流程或多个流 程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使 得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处 理, 从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个 流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基 本创造性概念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要 求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 离本发明实施例的精神和范围。 这样, 倘若本发明实施例的这些修改和变型属 于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和 变型在内。

Claims

权 利 要 求
1、 一种物理帧边界的调整方法, 其特征在于, 包括:
接收光线路终端 OLT在发现窗口或轮询周期发送的授权消息, 所述授权消 息携带用于同轴域的物理帧的边界的调整时间量信息, 所述发现窗口和所述轮 询周期是所述同轴域的物理帧的周期的整数倍;
根据所述调整时间量信息和所述同轴域的物理帧的周期, 调整所述同轴域 的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并按照调整后的所述 同轴域的物理帧的边界发送物理帧。
2、 如权利要求 1所述的方法, 其特征在于, 所述调整时间量信息包括时间 差偏移量和所述 OLT发送所述授权消息的时间戳;
调整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并按照调整后的所述同轴域的物理帧的边界发送物理帧, 具体包括:
将所述时间戳代表的时间作为本地时钟的当前时间;
将所述同轴域的物理帧的周期的整数倍加上所述时间戳和所述时间差偏移 量, 作为调整后的所述同轴域的物理帧的边界;
当所述本地时钟的当前时间到达调整后的所述同轴域的物理帧的边界时, 发送物理帧。
3、 如权利要求 1所述的方法, 其特征在于, 所述调整时间量信息包括物理 帧的预设边界和所述 OLT发送所述授权消息的时间戳;
调整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并按照调整后的所述同轴域的物理帧的边界发送物理帧, 具体包括:
将所述时间戳代表的时间作为本地时钟的当前时间;
将所述同轴域的物理帧的周期的整数倍加上所述物理帧的预设边界, 作为 调整后的所述同轴域的物理帧的边界;
当所述本地时钟的当前时间到达调整后的所述同轴域的物理帧的边界时, 发送物理帧。
4、 如权利要求 2所述的方法, 其特征在于, 所述时间差偏移量包括下列之 一或组合:
所述 OLT发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差 值;
所述 OLT发送所述授权消息的下行传输时延;
所述物理帧的预设边界与所述发现窗口或轮询周期的边界的差值。
5、 一种物理帧边界的调整方法, 其特征在于, 包括:
接收光线路终端 OLT在发现窗口或轮询周期发送的授权消息, 所述发现窗 口和所述轮询周期是同轴域的物理帧的周期的整数倍;
根据接收到所述授权消息的时间和所述同轴域的物理帧的周期, 调整所述 同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并按照调整后 的所述同轴域的物理帧的边界发送物理帧。
6、 如权利要求 5所述的方法, 其特征在于, 根据接收到所述授权消息的时 间和所述同轴域的物理帧的周期, 调整所述同轴域的物理帧的边界与所述发现 窗口或轮询周期的边界对齐, 具体包括:
将所述同轴域的物理帧的周期的整数倍加上接收到所述授权消息的时间, 作为调整后的所述同轴域的物理帧的边界。
7、 如权利要求 5所述的方法, 其特征在于, 所述授权消息携带时间差偏移 量;
调整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 具体包括:
将所述同轴域的物理帧的周期的整数倍加上接收到所述授权消息的时间和 所述时间差偏移量, 作为调整后的所述同轴域的物理帧的边界。
8、 如权利要求 7所述的方法, 其特征在于, 所述时间差偏移量包括下列之 一或组合:
所述 OLT发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差 值; 所述 OLT发送所述授权消息的下行传输时延。
9、 一种物理帧边界的调整方法, 其特征在于, 包括:
设置发现窗口和轮询周期是同轴域的物理帧的周期的整数倍;
在设置后的所述发现窗口或轮询周期向媒介转换设备发送授权消息。
10、 如权利要求 9 所述的方法, 其特征在于, 所述授权消息携带用于同轴 域的物理帧的边界的调整时间量信息。
11、 如权利要求 10所述的方法, 其特征在于, 所述调整时间量信息包括时 间差偏移量和发送所述授权消息的时间戳; 或者包括物理帧的预设边界和所述 时间戳。
12、 如权利要求 11所述的方法, 其特征在于, 所述时间差偏移量包括下列 之一或组合:
发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差值; 发送所述授权消息的下行传输时延;
所述物理帧的预设边界与所述发现窗口或轮询周期的边界的差值。
13、 一种媒介转换设备, 其特征在于, 包括:
收发器,用于接收光线路终端 OLT在发现窗口或轮询周期发送的授权消息, 所述授权消息携带用于同轴域的物理帧的边界的调整时间量信息, 所述发现窗 口和所述轮询周期是所述同轴域的物理帧的周期的整数倍;
处理器, 用于根据所述调整时间量信息和所述同轴域的物理帧的周期, 调 整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并通知 所述收发器按照调整后的所述同轴域的物理帧的边界发送物理帧。
14、 如权利要求 13所述的设备, 其特征在于, 所述调整时间量信息包括时 间差偏移量和所述 OLT发送所述授权消息的时间戳;
所述处理器, 具体用于:
将所述时间戳代表的时间作为本地时钟的当前时间;
将所述同轴域的物理帧的周期的整数倍加上所述时间戳和所述时间差偏移 量, 作为调整后的所述同轴域的物理帧的边界; 当所述本地时钟的当前时间到达调整后的所述同轴域的物理帧的边界时, 通知所述收发器发送物理帧。
15、 如权利要求 13所述的设备, 其特征在于, 所述调整时间量信息包括物 理帧的预设边界和所述 OLT发送所述授权消息的时间戳;
所述处理器, 具体用于:
将所述时间戳代表的时间作为本地时钟的当前时间;
将所述同轴域的物理帧的周期的整数倍加上所述物理帧的预设边界, 作为 调整后的所述同轴域的物理帧的边界;
当所述本地时钟的当前时间到达调整后的所述同轴域的物理帧的边界时, 通知所述收发器发送物理帧。
16、 如权利要求 14所述的设备, 其特征在于, 所述时间差偏移量包括下列 之一或组合:
所述 OLT发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差 值;
所述 OLT发送所述授权消息的下行传输时延;
所述物理帧的预设边界与所述发现窗口或轮询周期的边界的差值。
17、 一种媒介转换设备, 其特征在于, 包括:
收发器,用于接收光线路终端 OLT在发现窗口或轮询周期发送的授权消息, 所述发现窗口和所述轮询周期是同轴域的物理帧的周期的整数倍;
处理器, 用于根据接收到所述授权消息的时间和所述同轴域的物理帧的周 期, 调整所述同轴域的物理帧的边界与所述发现窗口或轮询周期的边界对齐, 并通知所述收发器按照调整后的所述同轴域的物理帧的边界发送物理帧。
18、 如权利要求 17所述的设备, 其特征在于, 所述处理器, 具体用于: 将所述同轴域的物理帧的周期的整数倍加上接收到所述授权消息的时间, 作为调整后的所述同轴域的物理帧的边界。
19、 如权利要求 17所述的设备, 其特征在于, 所述授权消息携带时间差偏 移量; 所述处理器, 具体用于:
将所述同轴域的物理帧的周期的整数倍加上接收到所述授权消息的时间和 所述时间差偏移量, 作为调整后的所述同轴域的物理帧的边界。
20、 如权利要求 19所述的设备, 其特征在于, 所述时间差偏移量包括下列 之一或组合:
所述 OLT发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差 值;
所述 OLT发送所述授权消息的下行传输时延。
21、 一种光线路终端, 其特征在于, 包括:
处理器, 用于设置发现窗口和轮询周期是同轴域的物理帧的周期的整数倍; 收发器, 用于在设置后的所述发现窗口或轮询周期向媒介转换设备发送授 权消息。
22、 如权利要求 21所述的终端, 其特征在于, 所述授权消息携带用于同轴 域的物理帧的边界的调整时间量信息。
23、 如权利要求 22所述的终端, 其特征在于, 所述调整时间量信息包括时 间差偏移量和发送所述授权消息的时间戳; 或者包括物理帧的预设边界和所述 时间戳。
24、 如权利要求 23所述的终端, 其特征在于, 所述时间差偏移量包括下列 之一或组合:
发送所述授权消息的时间与所述发现窗口或轮询周期的边界的差值; 发送所述授权消息的下行传输时延;
所述物理帧的预设边界与所述发现窗口或轮询周期的边界的差值。
25、 一种物理帧边界的调整系统, 其特征在于, 包括如权利要求 13-16任一 所述的媒介转换设备、 如权利要求 21-24任一所述的光线路终端 OLT和同轴域 终端; 或者
包括如权利要求 17-20任一所述的媒介转换设备、如权利要求 21-24任一所 述的 OLT和同轴域终端。
PCT/CN2013/076344 2013-05-28 2013-05-28 一种物理帧边界的调整方法、相关设备及系统 WO2014190495A1 (zh)

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