WO2011072575A1 - 无源光网络的注册窗口调整方法、系统和装置 - Google Patents

无源光网络的注册窗口调整方法、系统和装置 Download PDF

Info

Publication number
WO2011072575A1
WO2011072575A1 PCT/CN2010/079360 CN2010079360W WO2011072575A1 WO 2011072575 A1 WO2011072575 A1 WO 2011072575A1 CN 2010079360 W CN2010079360 W CN 2010079360W WO 2011072575 A1 WO2011072575 A1 WO 2011072575A1
Authority
WO
WIPO (PCT)
Prior art keywords
registered
optical network
network unit
equalization delay
optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2010/079360
Other languages
English (en)
French (fr)
Inventor
曾小飞
董英华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to ES10837012.3T priority Critical patent/ES2489471T3/es
Priority to EP10837012.3A priority patent/EP2487812B1/en
Publication of WO2011072575A1 publication Critical patent/WO2011072575A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a registration window adjustment method, system and apparatus for a passive optical network.
  • TDM PON Time Division Multiplexing Passive Optical Network
  • the central office equipment is an optical line termination (OLT)
  • the remote equipment is an optical network unit (ONU) and an optical distribution network (ODDN).
  • ODN mainly includes devices such as optical fibers and splitters.
  • Figure 1 shows the network topology of a two-stage splitter in ODN.
  • the physical distance between each ONU and the OLT is not necessarily equal. The maximum physical distance and the minimum physical distance are The difference is the maximum distance difference.
  • Each ONU needs to register with the OLT before it can communicate normally with the OLT.
  • the registration process is as follows:
  • the OLT periodically opens a registration window at regular intervals. In this window, the registered ONU does not transmit uplink data, and the unregistered ONU delays the registration after receiving the registration message (including the OLT beforehand).
  • the registration window size and the pre-equalization delay, random delay, and ONU fixed processing delay of each ONU are preset before registration. The longer the transmission distance of information, the greater the attenuation of optical power and the more severe the effect of dispersion.
  • Embodiments of the present invention provide a registration window adjustment method, system, and apparatus for a passive optical network, such that optical network units at various physical distances in a passive optical network can be registered on an optical line terminal.
  • the embodiment of the present invention provides the following technical solutions:
  • a method for adjusting a registration window of a passive optical network includes: transmitting a pre-equalization delay adapted to a preset initial registration window to an optical network unit to be registered; receiving the optical network unit to be registered according to the pre-equalization delay feedback And measuring the optical network unit to be tested according to the information; adjusting the pre-equalization delay according to the ranging result, and sending the information to the optical network unit to be registered, or adjusting the initial registration window at the same time And the pre-equalization delay, and the adjusted pre-equalization delay is sent to the to-be-registered optical network unit; receiving the registration information sent by the to-be-registered optical network unit according to the adjusted pre-equalization delay, and The optical network unit to be registered performs interaction to register the optical network unit to be registered.
  • An optical line terminal comprising: a transceiver unit, configured to send a pre-equalization delay adapted to a preset initial registration window to a to-be-registered optical network unit, and receive the to-be-registered optical network unit according to the pre-equalization delay feedback a measuring unit, configured to perform ranging on the optical network unit to be registered according to the information fed back by the optical network unit to be registered; and an adjusting unit, configured to adjust the method according to the ranging result of the measuring unit Pre-equalizing the delay, or adjusting the initial registration window and the pre-equalization delay; and the transceiver unit is further configured to send the adjusted pre-equalization delay of the adjustment unit And to the optical network unit to be registered, and receiving the registration information that is sent by the optical network unit to be registered according to the adjusted pre-equalization delay, and interacting with the optical network unit to be registered to register the to-be-registered The optical network unit is registered.
  • a passive optical network system comprising: an optical line terminal and an optical network unit to be registered, wherein the optical line terminal and the optical network unit to be registered are connected in a point-to-multipoint manner through an optical distribution network, wherein the light a line terminal, configured to send a pre-equalization delay that is adapted to the preset initial registration window to the to-be-registered optical network unit, receive information that is to be reported by the to-be-registered optical network unit according to the pre-equalization delay, and use the Information is used to measure the optical network unit to be tested, and adjust the pre-equalization delay according to the ranging balance and send to the optical network unit to be registered, or adjust the initial registration window and the pre-equalization simultaneously Delaying, and transmitting the adjusted pre-equalization delay to the optical network unit to be registered; the optical network unit to be registered is configured to receive a pre-equalization delay provided by the optical line terminal, and according to the pre-equalization delay Receiving corresponding response information to the optical line terminal, and
  • the solution provided by the embodiment of the present invention performs dynamic ranging on the optical network unit to be registered, and actively adjusts the pre-equalization delay of each optical network unit to be registered according to different physical distances. , or adjust the registration window and the pre-equalization delay of each optical network to be registered, so that the optical network unit whose actual physical distance and/or maximum physical distance difference in the passive optical network system exceeds the standard value can also be registered. Achieve normal communication. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below.
  • FIG. 1 is a schematic diagram of a system structure of a passive optical network
  • FIG. 2 is a flow chart of a method for adjusting a registration window of a passive optical network according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a registration window configuration of a method for adjusting a registration window of a passive optical network according to another embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an optical line terminal according to another embodiment of the present invention.
  • 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. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • the size of the registration window provided by the optical line terminal for registering the optical network unit is related to the maximum physical distance difference of each optical network unit to be registered.
  • the time when the registration information of the optical line terminal is reached to the nearest optical network unit to be registered is tminl
  • the time of reaching the farthest optical network unit is tmaxl
  • the optical network unit to be registered closest to and farthest from the optical line terminal The time at which the reported information arrives at the optical line terminal is tmin2 and tmax2, respectively, and the size of the registration window may be tmax2 - tminl c.
  • the optical line terminal may open a registration window of 250 ⁇ every time (for example, 5s), each to be registered.
  • the random delay time of the optical network unit is 0-48 ⁇ ⁇
  • the fixed delay time error of each optical network unit is 2 ⁇ ⁇
  • the 250us registration window can correspond to the transmission time difference ⁇ and the maximum physical distance difference of 20km. .
  • the physical distance between the optical network unit and the optical line terminal is measured in real time
  • the preset registration window size is adjusted according to different physical distances
  • the preset pre-equalization delay of each optical network unit is adjusted (adjusting the pre-equalization delay) It can adjust the transmission time difference indirectly, so that the optical network unit with a maximum physical distance of more than 20km and a maximum physical distance difference of more than 20km can also be registered to achieve normal communication.
  • the following are specific examples. 2 is a schematic flowchart of an embodiment of a method for adjusting a registration window in a passive optical network according to the present invention.
  • Step A1 pre-configured at least one initial registration window for providing registration to the ONU to be registered
  • Step A2 Send a pre-equalization delay corresponding to the initial registration window to each ONU to be registered;
  • Step A3 Receive response information of the pre-equalization delay feedback sent by the ONU to be registered according to step A2, and perform ranging on each to-be-registered ONU;
  • the response information may be a serial number of the ONU to be registered.
  • the ranging process for each ONU to be registered in step A3 may include:
  • the remaining time t and the half of the result of the product of the transmission speed C of the optical fiber in the optical fiber are taken as the distance d from the ONU to the optical line terminal to be registered.
  • the ranging of other ONUs to be registered in step A3 can refer to the above scheme.
  • Step A4 According to the ranging result, re-adjust the pre-equalization delay and re-transmit the adjusted pre-equalization delay to each ONU to be registered; or re-adjust the registration window and pre-equalization delay of the OLT, and re-adjust the adjusted pre-equalization delay Send to each ONU to be registered.
  • the method may further include the following Step: receiving the registration message sent by the to-be-registered optical network unit according to the adjusted pre-equalization delay.
  • step A4 may be as follows:
  • the pre-equalization delay sent in step A2 is re-adjusted and sent to each ONU to be registered;
  • the maximum difference between the physical distance of the ONU and the OLT to be registered is greater than the maximum physical distance difference corresponding to the preset initial registration window, and the physical distance of the at least one ONU to the OLT to be registered is greater than the preset registration window.
  • the maximum physical distance re-adjust the output registration window size preset in step A1 and the pre-equalization delay sent in step A2, and send the re-adjusted pre-equalization delay to each ONU to be registered.
  • the initial registration window preset in step A1 can be as follows:
  • the size of the pre-set initial registration window is large enough to meet the registration requirements of the optical network unit farthest from the optical line terminal; that is, according to experience and actual needs, set a larger window, and then in the subsequent adjustment step A4 Fine-tune the size of the window so that the registration window does not waste system resources while supporting all ONUs to be registered;
  • initial registration windows corresponding to specific physical distance segments; for example, according to a specific physical distance segment of 0 ⁇ 20km, 20 ⁇ 40km, 40 ⁇ 60km, three initial registration windows are preset, and the above three are respectively provided.
  • the ONUs to be registered in a specific physical distance segment are registered, so that the ONUs to be registered at different distances are registered in different windows.
  • step A4 can flexibly adopt various adjustment methods:
  • the registration window size of the OLT and the pre-equalization delay of each ONU to be registered are adjusted to the default configuration specified by the standard.
  • the pre-equalization delay is to ensure that the uplink registration information of each ONU to be registered can reach the OLT within the specified registration window.
  • the OLT gives each ONU command to be registered in advance, so that it receives a registration message and delays for a certain period of time (including pre- The equalization delay plus the random delay plus the ONU fixed processing delay) then issues the registration information.
  • the ONU's physical distance exceeds 20km, which is divided into two cases:
  • the pre-equalization delay of the ONU to be registered is adjusted according to the system maximum distance dmax and the minimum distance dmin obtained by the above ranging step. Ii.
  • the maximum physical distance difference also exceeds 20km.
  • Each ONU to be registered can be divided into multiple groups according to physical distance, and each group is adjusted to the same or different pre-equalization delays.
  • the embodiment of the present invention dynamically measures the physical distance between the OLT and each ONU to be registered, and actively adjusts the pre-equalization delay of each ONU to be registered according to different physical distances, or adjusts the registration window of the OLT and each ONU to be registered.
  • the pre-equalization delay enables the ONUs whose actual physical distance and/or maximum physical distance difference in the PON system exceed the standard value to be registered, thereby achieving normal communication.
  • Embodiment 2 Step SI 1. Set the initial configuration of the OLT in advance.
  • the initial configuration of the OLT may be set to an initial registration window that can meet the registration requirements of the optical network unit farthest from the optical line terminal, and the size of the initial registration window may be based on experience and actual needs. And set.
  • Step S12 The OLT 4 opens the registration window according to the initial configuration, and sends a pre-equalization delay corresponding to the initial registration window to each ONU to be registered.
  • Step S13 The OLT performs ranging on each ONU to be registered.
  • the ranging result of the ONU to be registered is: Part of the physics of the ONU to be registered The distance exceeds 20km and the maximum physical distance difference is more than 20km.
  • the physical distance of the ONU closest to the optical line terminal is 0 km
  • the physical distance of the farthest ONU is 60 km
  • the maximum physical distance difference is 60 km.
  • Step S14 The OLT adjusts the pre-equalization delay and modifies the initial configuration.
  • the ONUs to be registered may be grouped according to the physical distance, for example, according to 0 ⁇ 20km, 20 ⁇ 40km, 40 ⁇ 60km. Grouping makes the adjustment range smaller, which facilitates the rapid adjustment.
  • the adjusted pre-equalization delay can be stored as a working configuration, and the working configuration of each group can be the same or different from the initial configuration.
  • the adjustment scheme of 0 ⁇ 20km distance can use the system default initial configuration
  • the adjustment scheme of 20 ⁇ 40km distance can use the adjusted working configuration.
  • the parameter adjustment of each group can be performed simultaneously, or in a certain order.
  • the sequence is performed, after the adjustment of one group is completed, the adjustment of the next group is continued, so step S14 can be repeated.
  • the adjustment scheme can be preset and stored for various grouping situations, and the scheme can be directly read during adjustment, and the adjustment speed is faster. If the adjustment scheme of the distance of 20 ⁇ 40km is stored as the scheme 20, the adjustment parameters recorded by the scheme 20 for the group of 20 ⁇ 40km can be directly loaded after grouping. Step S15: The ONU to be registered sends a registration message to the OLT.
  • Adjustment and registration can be performed separately for each group, that is, the group starts to register after adjusting one group; or all ONUs are registered after all groups have been adjusted.
  • the execution order of step 203 and step 204 is repeated until all the ONUs to be registered are registered; in the case of registration together, steps 203 and 204 are performed once.
  • the registration process when the physical distance to the registered ONU exceeds 20 km and the maximum physical distance difference exceeds 20 km, the preset pre-equalization delay is actively adjusted, and the initial configuration is modified, so that all the ONUs to be registered can be on the OLT. Registration to ensure normal communication over long distances of the network.
  • Step S21 preset an initial configuration of the OLT.
  • the initial configuration of the OLT may be set to multiple and a specific physical distance.
  • Step S23 The OLT measures the ONUs to be registered, and the ranging result is that the physical distance of the part to be registered ONU exceeds 20 km, and the maximum physical distance difference also exceeds 20 km.
  • the physical distance of the ONU closest to the optical line terminal is 0 km
  • the physical distance of the farthest ONU is 60 km
  • the maximum physical distance difference is 60 km.
  • Step S24 The OLT adjusts the registration window and the pre-equalization delay of each ONU to be registered, and modifies the initial configuration.
  • the ONUs to be registered may be grouped according to the physical distance, for example, according to 0 to 20 km, 20 to 40 km, and 40 to 60 km. Grouping reduces the scope of the adjustment and facilitates the rapid adjustment.
  • the parameter adjustment of each group can be performed simultaneously, or in a certain order.
  • the sequence is performed, after the adjustment of one group is completed, the adjustment of the next group is continued, so step S24 can be repeated.
  • the adjustment scheme can be preset and stored for various grouping situations, and the scheme can be directly read during adjustment, and the adjustment speed is faster.
  • the adjusted parameter can be stored as a working configuration, and the working configuration at this time includes two parts, as shown in FIG. 3: - part is the registration window existing in the original initial configuration (mainly used for The ONUs that have been measured, their physical positions have not changed, but the re-registration due to power-on and other reasons, and the other part is the larger registration window that was not in the original initial configuration.
  • the larger registration window has a longer period.
  • the uplink bandwidth is increased, mainly to solve the problem that the ONU to be registered that is far away from the new access cannot complete the registration.
  • Step S25 Each ONU to be registered sends a registration message to the OLT.
  • the registration process when the physical distance of the ONU to be registered exceeds 20 km and the maximum physical distance difference exceeds 20 km, the preset registration window and the pre-equalization delay are actively adjusted, and the initial configuration is modified so that all ONUs to be registered can be Register on the OLT to ensure normal communication over long distances of the network.
  • the embodiment of the present invention provides a registration window adjustment method for a passive optical network, and a registration window adjustment device for the passive optical network.
  • the device may be an optical line terminal. For details, refer to the following Embodiment 4.
  • Embodiment 4 The fourth embodiment of the present invention provides an optical line terminal that can be applied in a passive optical network system to implement adjustment of an ONU registration window in a passive optical network system.
  • the ray path terminal may include:
  • the transceiver unit 12 is configured to send a pre-equalization delay corresponding to the preset initial registration window to the optical network unit to be registered, and receive information that is to be reported by the optical network unit to be registered according to the pre-equalization delay; and the measuring unit 13 And the adjusting unit 14 is configured to adjust the pre-equalization delay according to the ranging result of the measuring unit 13 according to the information fed back by the optical network unit to be registered, Or adjusting the initial registration window and the pre-equalization delay simultaneously;
  • the transceiver unit 12 is further configured to send the adjusted pre-equalization delay of the adjustment unit 14 to the optical network unit to be registered.
  • the optical line terminal may further include:
  • the setting unit 11 is configured to pre-configure at least one initial registration window for registration by the optical network unit to be registered.
  • the setting unit 11 may include a first setting subunit 111 and/or a second setting word unit 112.
  • the first setting sub-unit 111 may be configured to pre-configure an initial registration window for providing registration to the optical network unit to be registered, where the size of the initial registration window is the farthest from the optical line terminal. Registration of the optical network unit to be registered is required;
  • the second setting sub-unit 112 may be configured to pre-configure a plurality of initial registration windows for providing registration to the optical network unit to be registered, where the sizes of the multiple registration windows are different from different optical networks to be registered.
  • the physical distance segment from the unit to the optical line termination corresponds.
  • the measuring unit 13 may include: a recording sub-unit 131, configured to record a total time from transmitting a pre-equalization delay adapted to the initial registration window to receiving information fed back by the optical network unit to be registered;
  • a calculating sub-unit 132 configured to subtract the pre-equalization delay, the fixed delay of the optical network unit to be registered, and the maximum random delay by the total time recorded by the recording sub-unit to obtain a remaining time, and the remaining time And multiplying the transmission speed of the light in the optical fiber, and taking half of the result of the product as the distance from the optical network unit to be registered to the optical line terminal.
  • the adjustment unit 14 may include a first adjustment subunit 141 and/or a second adjustment subunit 142.
  • the first adjustment sub-unit 141 is configured to: at a maximum physical distance difference between the optical network unit to the optical line terminal to be registered, a maximum physical distance difference corresponding to the initial registration window, and at least Adjusting the pre-equalization delay when a physical distance from the optical network unit to the optical line terminal to be registered is greater than a maximum physical distance allowed by the initial registration window; and/or
  • the second adjustment word unit 142 is configured to: at a maximum physical distance difference between the optical network unit to the optical line terminal to be registered, a maximum physical distance difference corresponding to the initial registration window, and at least one light to be registered
  • the initial registration window set by the setting unit and the pre-equalization delay are simultaneously adjusted.
  • the optical network unit whose actual value of the maximum physical distance difference exceeds the standard value can also be registered to achieve normal communication.
  • the embodiment of the present invention further provides a passive optical network system.
  • the system architecture of the passive optical network system can be referred to FIG. 1 , which includes an optical line terminal and a device. Registering an optical network unit, the optical line terminal and the to-be-registered optical network unit are connected in a point-to-multipoint manner through an optical distribution network.
  • the optical line terminal is configured to delay a pre-equalization that is adapted to a preset initial registration window.
  • Sending to the to-be-registered optical network unit receiving the information that the to-be-registered optical network unit feeds back according to the pre-equalization delay, and using the information to perform ranging on the optical network unit to be tested, and according to the initial Registering the window and the pre-equalization delay, and transmitting the adjusted pre-equalization delay to the optical network unit to be registered.
  • the optical network unit to be registered is configured to receive a pre-equalization delay provided by the optical line terminal, and feed back corresponding response information to the optical line terminal according to the pre-equalization delay.
  • a person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Description

无源光网络的注册窗口调整方法、 系统和装置 本申请要求于 2009年 12月 18日提交中国专利局、 申请号为 200910261626.7、 发明名称为 "无源光网络的注册窗口调整方法、系统和装置"的中国专利申请的优 先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域， 尤其涉及一种无源光网络的注册窗口调整方法、 系统和装置。 背景技术 时分复用无源光网洛（ TDM PON, Time Division Multiplexing Passive Optical Network ) 系统由局端设备和远端设备组成。 如图 1所示， 局端设备为光线路终 端 （OLT， Optical Line Termination ), 远端设备为光网络单元 （ ONU， Optical Network Unit )和光分配网洛 ( ODN， Optical Distribution Network )等单元构成， ODN主要包括光纤和分光器 （splitter ) 等器件。
图 1所示为 ODN存在两级分光器的网絡拓朴。 一个 OLT下面可以有多个 ONU, 有的 ONU处于一级分光器下面， 有的处于二级分光器下面， 各个 ONU 到 OLT的物理距离就不一定相等， 最大的物理距离与最小的物理距离的差则为 最大距离差。
各个 ONU在与 OLT正常通信前， 需要向 OLT注册。 注册过程为： OLT每 隔一定时间周期性地开放一个注册窗口， 在这个窗口内， 已经注册的 ONU不传 输上行数据， 而没有注册的 ONU在收到注册消息后延迟一定时间 （包括 OLT 事先下发给各个 ONU的预均衡延迟， 加上随机延迟和 ONU固定处理延迟）， 向 OLT传输注册信息，以避免各个 ONU的信息产生沖突。注册窗口大小和各 ONU 的预均衡延迟、 随机延迟、 ONU固定处理延迟的时间长短为注册前预先设置。 信息的传输距离越长， 光功率衰减越大， 色散影响也越严重。 因此， 现有 的 PON技术标准都对 PON系统的最大物理距离和最大物理距离差进行了规定， 比如， 吉比特无源光网络（ GPON， Gigabit-capable Passive Optical Network )标 准规定， 系统最大物理距离为 20km, 最大物理距离差为 20km。 而随着 PON技 术的发展， 目前 PON网络覆盖范围越来越广， 传输距离越来越大。 在这种发展 趋势下， PON 系统中的最大物理距离和最大物理距离差的实际值可能会超过现 有标准中的规定值而导致 PON系统无法正常工作。 目前， 现有技术并没有提供 解决方案。 发明内容 本发明实施例提供了一种无源光网络的注册窗口调整方法、 系统和装置， 使得无源光网络中处于各种物理距离的光网络单元都能在光线路终端上注册。
为解决上述技术问题， 本发明实施例提供如下技术方案：
一种无源光网络的注册窗口调整方法， 包括： 将与预设初始注册窗口相适 应的预均衡延迟发送至待注册光网络单元； 接收所述待注册光网络单元按照所 述预均衡延迟反馈的信息， 并根据所述信息对所述待测试光网络单元进行测距； 根据测距结果， 调整所述预均衡延迟并发送至所述待注册光网络单元， 或同时 调整所述初始注册窗口和所述预均衡延迟， 并将调整后的预均衡延迟发送至所 述待注册光网络单元； 接收所述待注册光网络单元根据所述调整后的预均衡延 时发送的注册信息， 并与所述待注册光网絡单元进行交互以对所述待注册光网 络单元进行注册。
一种光线路终端， 包括： 收发单元， 用于将与预设初始注册窗口相适应的 预均衡延迟发送至待注册光网络单元， 并接收所述待注册光网络单元按照所述 预均衡延迟反馈的信息； 测量单元， 用于根据所述待注册光网络单元反馈的信 息， 对所述待注册光网络单元进行测距； 调整单元， 用于根据所述测量单元的 测距结果， 调整所述预均衡延迟， 或同时调整所述初始注册窗口和所述预均衡 延迟； 并且， 所述收发单元， 还用于将所述调整单元调整后的预均衡延迟发送 至所述待注册光网络单元， 并接收所述待注册光网络单元根据所述调整后的预 均衡延时发送的注册信息， 并且与所述待注册光网络单元进行交互以对所述待 注册光网络单元进行注册。
一种无源光网络系统， 包括光线路终端和待注册光网络单元， 所述光线路 终端和所述待注册光网络单元通过光分配网络以点到多点的方式连接， 其中， 所述光线路终端， 用于将与预设初始注册窗口相适应的预均衡延迟发送至所述 待注册光网络单元， 接收所述待注册光网络单元按照所述预均衡延迟反馈的信 息， 并利用所述信息对所述待测试光网络单元进行测距， 并且根据测距结杲， 调整所述预均衡延迟并发送至所述待注册光网络单元， 或同时调整所述初始注 册窗口和所述预均衡延迟， 并将调整后的预均衡延迟发送至所述待注册光网络 单元； 所述待注册光网络单元， 用于接收所述光线路终端提供的预均衡延时， 并根据所述预均衡延时向所述光线路终端反馈对应的响应信息， 并且接收所述 待注册光网络单元根据所述调整后的预均衡延时发送的注册信息， 并与所述待 注册光网络单元进行交互以对所述待注册光网络单元进行注册。
与现有的技术相比， 本发明实施例提供的方案通过是对所述待注册光网絡 单元进行动态测距， 并根据不同的物理距离及时主动地调整各个待注册光网络 单元的预均衡延迟， 或同时调整注册窗口和各个待注册光网络的预均衡延迟， 使在无源光网络系统中最大物理距离和 /或最大物理距离差的实际值超过标准规 定值的光网络单元也能注册， 实现正常通信。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对实施 例中所需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是 本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动的 前提下， 还可以根据这些附图获得其他的附图。 图 1是无源光网络的系统结构拓朴图； 图 2 是本发明一种实施例提供的无源光网络注册窗口调整方法的流程示意 图；
图 3 是本发明另一种实施例提供的无源光网络注册窗口调整方法的注册窗 口配置示意图；
图 4是本发明又一种实施例提供的光线路终端的结构示意图。 具体实施方式 下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行清 楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是 全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。 通常， 在无源光网络 PON系统中， 光线路终端提供的用于给光网络单元进 行注册的注册窗口的大小与各个待注册光网络单元的最大物理距离差有关。 支 设光线路终端的注册信息到达最近的待注册光网络单元的时间为 tminl , 到达最 远的光网络单元的时间为 tmaxl，而离光线路终端最近的和最远的待注册光网络 单元的上报信息到达光线路终端的时间分别为 tmin2和 tmax2 , 则注册窗口的大 小可以为 tmax2 -tminl c 例如， 光线路终端可以每隔一段时间 （比如 5s )开一个 250μβ的注册窗口， 每个待注册光网络单元随机延迟的时间为 0-48μδ, 各个光网络单元固定延迟时 间误差 2μδ， 这样待注册光网络单元到光线路终端的单向传输时间差最大为 (250-48-2)/2=100μ8，考虑光信号在光纤传输的速度大致为光在真空的传播速度 C 除以光纤的折射率 η， 即 C/n=(3.0x l08)/1.5=2xl08m/s， 这样， 所述 250us的注册 窗口便可以对应传输时间差 ΙΟΟμβ、 最大物理距离差 20km的情况。。 本发明实施例通过实时测量光网络单元到光线路终端的物理距离， 根据不 同的物理距离调整预设注册窗口大小和 /或调整预设的各光网络单元的预均衡延 迟（调整预均衡延迟则能间接调整传输时间差）， 使最大物理距离超过 20km， 以及最大物理距离差也超过 20km的光网络单元也能注册， 实现正常通信。 以下 为具体实施例。 参见图 2，其为本发明无源光网络中注册窗口调整方法一种实施例的流程示 意图。
实施例一、
步骤 Al、 预先配置至少一个用于提供给待注册 ONU进行注册的初始注册 窗口；
步骤 A2、 将与所述初始注册窗口相适应的预均衡延迟发送至各个待注册 ONU;
步骤 A3、接收所述待注册 ONU按步驟 A2发送的预均衡延迟反馈的响应信 息， 并分别对各个待注册 ONU进行测距；
其中， 所述响应信息可以为所述待注册 ONU的序列号。
进一步地， 在一个实施例中， 步骤 A3中对每个待注册 ONU的测距过程可 以包括：
记录从发送与所述初始注册窗口相适应的预均衡延迟到接收到所述待注册 ONU反馈的信息的总时间 T;
将所述总时间减去步骤 A2发送的预均衡延迟 Dp、所述待注册 ONU的固定 延迟 Df以及最大随机延迟 Dm， 从而得到一剩余时间 t;
将所述剩余时间 t和光在光纤中的传输速度 C作乘积；
取上述的剩余时间 t和光在光纤中的传输速度 C作乘积的结果的一半作为 所述待注册 ONU至光线路终端的距离 d。
即， 所述待注册 ONU到 OLT的距离 ά = Cxt/2, 其中 t = T-(Dp+Df+Dm)。 并且， 步骤 A3中对其他待注册 ONU的测距可以参照以上方案。
步骤 A4、 根据测距结果， 重新调整预均衡延迟并将调整后的预均衡延迟重 新发送至各个待注册 ONU; 或者重新调整 OLT的注册窗口和预均衡延迟， 并将 调整后的预均衡延迟重新发送至各个待注册 ONU。
进一步地， 在步骤 A4完成之后， 在具体实施例中， 所述方法还可包括以下 步骤: 接收所述待注册光网络单元根据所述调整后的预均衡延时发送的注册信 进一步地， 在一个实施例中， 步骤 A4可以如下：
若各个待注册 ONU至 OLT的物理距离的最大差值在预设的初始注册窗口 对应的最大物理距离差之内， 且存在至少一个待注册 ONU至 OLT的物理距离 大于预设的初始注册窗口所允许的最大物理距离，则重新调整步骤 A2发送的预 均衡延迟并发送至各个待注册 ONU;
若存在至少一个待注册 ONU至 OLT的物理距离的最大差值大于预设的初 始注册窗口对应的最大物理距离差， 且存在至少一个待注册 ONU至 OLT的物 理距离大于预设的注册窗口所允许的最大物理距离，重新调整步骤 A1预设置的 输出注册窗口大小和步骤 A2发送的预均衡延迟，并将重新调整的预均衡延迟发 送至各个待注册 ONU。
另外， 步骤 A1中预先设置的初始注册窗口可以如下：
1、 预先设置的初始注册窗口的大小足够大， 能够满足离光线路终端最远的 光网络单元的注册需要； 即根据经验和实际需要， 设置一个较大的窗口， 再在 后续调整步骤 A4 中微调该窗口的大小， 使该注册窗口在能支持所有的待注册 ONU的同时不浪费系统资源；
2、 预先设置多个与特定的物理距离段相对应的初始注册窗口； 例如按 0~20km、 20〜40km、 40~60km的特定物理距离段， 预先设置三个初始注册窗口， 分别提供上述三个特定物理距离段内的待注册 ONU进行注册，让不同距离的待 注册 ONU在不同的窗口内注册。
具体而言， 当本发明实施例的方法应用在 GPON系统时， 根据测距结果， 步骤 A4可灵活釆用多种调整方式：
1、 当所有待注册 ONU的物理距离在 0~20km之间时， 将 OLT的注册窗口 大小和各个待注册 ONU的预均衡延迟调整至标准规定的默认配置。预均衡延迟 是为了确保各个待注册 ONU上行注册信息能在指定的注册窗口内到达 OLT, OLT提前给各个待注册 ONU命令， 让其收到注册消息后延迟一定时间（包括预 均衡延迟加上随机延迟再加上 ONU固定处理延迟）再上发注册信息。
2、 部分待注册 ONU的物理距离超出 20km, 再分为两种情况：
i、 最大物理距离差未超出 20km。
在这种情况下， 根据上述测距步骤得出的系统最大距离 dmax和最小距离 dmin, 调整所述待注册 ONU的预均衡延迟。 ii、 最大物理距离差也超出 20km。
保持注册窗口大小不变， 调整各个待注册 ONU的预均衡延迟， 使处于各种 物理距离的待注册 ONU都能注册； 或者； 在预设置的是一个大注册窗口时， 同时调整注册窗口大小和各个待注册 ONU的预均衡延迟； 或者；
可以将各个待注册 ONU按照物理距离分成多组，分别将各组调整为相同或 不同预均衡延迟。
本发明实施例通过是动态测量 OLT与各个待注册 ONU之间的物理距离， 并根据不同的物理距离及时主动地调整各个待注册 ONU的预均衡延迟，或调整 OLT的注册窗口和各个待注册 ONU的预均衡延迟， 使 PON系统中最大物理距 离和 /或最大物理距离差的实际值超过标准规定值的 ONU也能注册， 实现正常 通信。
实施例二、 步骤 SI 1、 预先设置 OLT的初始配置。
在本实施例中， 所述 OLT初始配置的设置可以为设置一个能够满足离光线 路终端最远的光网络单元的注册需要的初始注册窗口， 所述初始注册窗口的大 小可以根据经验和实际需要而定。
步骤 S12、 OLT 4艮据初始配置打开注册窗口，并将与所述初始注册窗口相适 应的预均衡延迟发送至各个待注册 ONU。
步骤 S13、 OLT对各个待注册 ONU进行测距。
在本实施例中， 所述待注册 ONU的测距结果为： 部分待注册 ONU的物理 距离超出 20km, 最大物理距离差也超过 20km。
例如， 与光线路终端距离最近的 ONU的物理距离为 0km， 最远的 ONU的 物理距离为 60km， 最大物理距离差为 60km。
步骤 S14、 OLT调整预均衡延迟， 并对所述初始配置进行修改。 调整预均衡延迟之前， 可将所述待注册 ONU按照物理距离远近进行分组， 例如按照 0~20km、 20~40km、 40~60km分为三组。 分组使得调整的范围缩小， 有利于调整的快速进行。
调整之后的预均衡延迟可存储为工作配置， 各组的工作配置可与初始配置 相同或者不相同。例如， 0~20km距离的调整方案则可使用系统默认的初始配置， 20~40km距离的调整方案可使用调整后的工作配置。
各组的参数调整可同时进行， 或按一定顺序进行。 按序进行时， 则是在一 组调整完毕后， 继续下一组的调整， 因此步骤 S14可以重复进行。
另外， 可针对各种分组情况预先设置并存储调整方案， 调整时直接读取该 方案， 调整速度则更快。 如将 20~40km距离的调整方案存储为方案 20， 则分组 后对 20~40km的组直接加载方案 20记录的调整参数即可。 步骤 S15、 待注册 ONU向 OLT发送注册消息。
调整和注册可以是每組单独进行， 即调整完一组则该组开始注册； 或者是 所有组全部调整完毕后， 所有待注册 ONU—起注册。 在单独注册的情况下， 步 骤 203和步骤 204的执行顺序为反复进行， 直至所有待注册 ONU注册完毕； 在 一起注册的情况下， 步骤 203和步骤 204则执行一次即可。 本发明实施例在注册过程中， 在到注册 ONU的物理距离超出 20km, 最大 物理距离差也超过 20km时， 主动调整预设置的预均衡延迟， 修改初始配置， 使 得所有待注册 ONU可在 OLT上注册， 保证网络的远距离正常通信。
实施例三、
步骤 S21、 预先设置 OLT的初始配置。
在本实施例中， 所述 OLT初始配置的设置可以为设置多个与特定的物理距 离段相对应的注册窗口，其中所述特定物理距离段 0〜20km、 20〜40km、 40〜60km。 步骤 S22、 OLT 4艮据初始配置打开注册窗口，并将与所述初始注册窗口相适 应的预均衡延迟发送至各个待注册 ONU。
步骤 S23、 OLT对各个待注册 ONU测距， 测距结果为部分待注册 ONU的 物理距离超出 20km， 最大物理距离差也超过 20km。
例如， 与光线路终端距离最近的 ONU的物理距离为 0km， 最远的 ONU的 物理距离为 60km， 最大物理距离差为 60km。
步骤 S24、 OLT调整注册窗口和各待注册 ONU的预均衡延迟， 并对初始配 置进行修改。
本实施例中， 调整注册窗口之前， 可将待注册 ONU按照物理距离远近进行 分组， 例如按照 0~20km、 20~40km、 40~60km分为三组。 分组使得调整的范围 缩小， 有利于调整的快速进行。
各组的参数调整可同时进行， 或按一定顺序进行。 按序进行时， 则是在一 组调整完毕后， 继续下一组的调整， 因此步骤 S24可以重复进行。
与步骤 S14类似， 可针对各种分组情况预先设置并存储调整方案， 调整时 直接读取该方案， 调整速度则更快。
另外， 在本实施例中， 可将调整后的参数存储为工作配置， 此时的工作配 置包括两个部分， 参见图 3: —部分是原来初始配置中已有的注册窗口 （主要是 用来已经测距的 ONU, 它们物理位置没有改变， 但是上下电等原因导致的重新 注册）， 另外一部分是原来初始配置中没有的较大注册窗口， 所述较大的注册窗 口的周期更长， 可提高上行带宽， 主要是解决新接入的距离较远的待注册 ONU 无法完成注册的情况。
步骤 S25、 各个待注册 ONU向 OLT发送注册消息。 本发明实施例在注册过程中， 在待注册 ONU的物理距离超出 20km， 最大 物理距离差也超过 20km时， 主动调整预设置的注册窗口和预均衡延迟， 修改初 始配置， 使得所有待注册 ONU可在 OLT上注册， 保证网络的远距离正常通信。 本发明实施例除了提供一种无源光网络的注册窗口调整方法， 还提供一种 无源光网络的注册窗口调整装置， 所述装置可以为光线路终端， 具体方案请参 阅以下实施例四。
实施例四、 本发明实施例四提供一种光线路终端， 其可应用在无源光网络系统中， 实 现无源光网络系统中 ONU注册窗口的调整。 具体而言， 如图 4所示， 所述光线 路终端可以包括：
收发单元 12， 用于将与预设初始注册窗口相适应的预均衡延迟发送至待注 册光网络单元， 并接收所述待注册光网络单元按照所述预均衡延迟反馈的信息； 测量单元 13 , 用于根据所述待注册光网络单元反馈的信息， 对所述待注册 光网络单元进行测距； 调整单元 14,用于根据所述测量单元 13的测距结果，调整所述预均衡延迟， 或同时调整所述初始注册窗口和所述预均衡延迟；
并且， 所述收发单元 12， 还可用于将所述调整单元 14调整后的预均衡延迟 发送至所述待注册光网络单元。
进一步地， 在一种实施例中， 所述光线路终端还可以包括：
设置单元 11， 用于预先配置至少一个初始注册窗口以供所述待注册光网络 单元进行注册。
请参阅图 4， 在具体实施例中， 所述设置单元 11可以包括第一设置子单元 111和 /或第二设置字单元 112。 其中， 所述第一设置子单元 111 可以用于预先配置一个用于提供给所述待 注册光网络单元进行注册的初始注册窗口， 其中所述初始注册窗口的大小满足 离光线路终端最远的待注册光网络单元的注册需要；
所述第二设置子单元 112 可以用于预先配置多个用于提供给所述待注册光 网络单元进行注册的初始注册窗口， 其中所述多个注册窗口的大小分别与不同 的待注册光网络单元至光线路终端的物理距离段相对应。
进一步地， 在具体实施例中， 所述测量单元 13可以包括： 记录子单元 131，用于记录的从发送与所述初始注册窗口相适应的预均衡延 迟到接收到所述待注册光网络单元反馈的信息的总时间；
计算子单元 132， 用于将所述记录子单元记录的总时间减去所述预均衡延 迟、 所述待注册光网络单元的固定延迟以及最大随机延迟以得到一剩余时间， 将所述剩余时间和光在光纤中的传输速度作乘积， 并取所述乘积的结果的一半 作为所述待注册光网络单元至光线路终端的距离。
进一步地，在具体实施例中，所述调整单元 14可以包括第一调整子单元 141 和 /或第二调整子单元 142。
其中， 所述第一调整子单元 141 , 用于在所述待注册光网络单元至光线路终 端的物理距离的最大差值在所述初始注册窗口对应的最大物理距离差之内， 且 存在至少一个待注册光网络单元至光线路终端的物理距离大于所述初始注册窗 口所允许的最大物理距离时， 调整所述预均衡延迟； 和 /或
所述第二调整字单元 142，用于在所述待注册光网絡单元至光线路终端的物 理距离的最大差值大于所述初始注册窗口对应的最大物理距离差， 且存在至少 一个待注册光网络单元至光线路终端的物理距离大于所述初始注册窗口所允许 的最大物理距离时， 同时调整所述设置单元设置的初始注册窗口和所述预均衡 延迟。 距， 并根据不同的物理距离及时主动地调整各个待注册光网络单元的预均衡延 迟， 或同时调整注册窗口和各个待注册光网络的预均衡延迟， 使在无源光网络 系统中最大物理距离和 /或最大物理距离差的实际值超过标准规定值的光网络单 元也能注册， 实现正常通信。
进一步地， 基于以上实施例所描述的方法和装置， 本发明实施例还进一步 一种无源光网络系统， 所述无源光网络系统的系统架构可参阅图 1， 其包括光线 路终端和待注册光网络单元， 所述光线路终端和所述待注册光网络单元通过光 分配网络以点到多点的方式连接。 其中， 所述光线路终端， 用于将与预设初始注册窗口相适应的预均衡延迟 发送至所述待注册光网络单元， 接收所述待注册光网络单元按照所述预均衡延 迟反馈的信息， 并利用所述信息对所述待测试光网络单元进行测距， 并且根据 所述初始注册窗口和所述预均衡延迟， 并将调整后的预均衡延迟发送至所述待 注册光网络单元。
所述待注册光网络单元， 用于接收所述光线路终端提供的预均衡延时， 并 根据所述预均衡延时， 向所述光线路终端反馈对应的响应信息。 本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分步骤可 以通过程序指令相关的硬件来完成， 前述的程序可以存储于一计算机可读取存 储介质中， 该程序在执行时， 执行包括上述方法实施例的步骤； 而前述的存储 介质包括： ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
以上对本发明实施例提供的一种调整光网络注册窗口的方法及装置进行了 详细介绍， 本文中应用了具体个例对本发明的原理及实施方式进行了阐述， 以 领域的一般技术人员， 依据本发明的思想， 在具体实施方式及应用范围上均会 有改变之处， 综上可知， 本说明书内容不应理解为对本发明的限制。

Claims

权利要求 书
1、 一种无源光网络的注册窗口调整方法， 其特征在于， 包括：
将与预设初始注册窗口相适应的预均衡延迟发送至待注册光网络单元； 接收所述待注册光网络单元按照所述预均衡延迟反馈的信息， 并对所述待 测试光网絡单元进行测距；
根据测距结果， 调整所述预均衡延迟并将调整后的预均衡延时发送至所述 待注册光网络单元， 或同时调整所述初始注册窗口和所述预均衡延迟， 并将调 整后的预均衡延迟发送至所述待注册光网络单元； 接收所述待注册光网络单元根据所述调整后的预均衡延时发送的注册信 息， 并与所述待注册光网络单元进行交互以对所述待注册光网絡单元进行注 册。
2、 根据权利要求 1所述的方法， 其特征在于， 还包括： 预先配置一个用于提供给所述待注册光网络单元进行注册的初始注册窗 口， 其中所述初始注册窗口的大小满足离光线路终端最远的待注册光网络单元 的注册需要； 或者
口， 其中， 所述多个初始注册窗口分别对应于不同的待注册光网络单元至光线 路终端的物理距离段。
3、 根据权利要求 1 所述的方法， 其特征在于， 对所述待注册光网络单元 进行测距的步骤包括：
记录从发送与所述初始注册窗口相适应的预均衡延迟到接收到所述待注 册光网络单元反馈的信息的总时间；
将所述总时间减去所述预均衡延迟、 所述待注册光网络单元的固定延迟以 及最大随机延迟， 已得到剩余时间；
将所述剩余时间和光在光纤中的传输速度作乘积；
取所述乘积的结果的一半作为所述待注册光网络单元至光线路终端的距 离。
4、 根据权利要求 1至 3任一项所述的方法， 其特征在于， 根据测距结果 调整所述预均衡延迟并将调整后的预均衡延时发送至所述待注册光网络单元 的步骤包括： 若所述待注册光网络单元至光线路终端的物理距离的最大差值在所述初 始注册窗口对应的最大物理距离差之内， 且存在至少一个待注册光网络单元至 光线路终端的物理距离大于所述初始注册窗口所允许的最大物理距离， 则调整 所述预均衡延迟， 并将调整后的预均衡延时重新发送至所述待注册光网絡单 元。
5、 根据权利要求 1至 3任一项所述的方法， 其特征在于， 根据测距结果， 同时调整所述初始注册窗口和所述预均衡延迟， 并将调整后的的预均衡延迟发 送至所述待注册光网络单元的步骤包括： 若所述待注册光网络单元至光线路终端的物理距离的最大差值大于所述 初始注册窗口对应的最大物理距离差， 且存在至少一个待注册光网络单元至光 线路终端的物理距离大于所述初始注册窗口所允许的最大物理距离， 则同时调 整所述初始注册窗口和所述预均衡延迟， 并将调整后的预均衡延迟重新发送至 所述待注册光网络单元。
6、 一种光线路终端， 其特征在于， 包括： 收发单元， 用于将与预设初始注册窗口相适应的预均衡延迟发送至待注册 光网络单元， 并接收所述待注册光网络单元按照所述预均衡延迟反馈的信息； 测量单元， 用于根据所述待注册光网络单元反馈的信息， 对所述待注册光 网络单元进行测距； 调整单元， 用于根据所述测量单元的测距结果， 调整所述预均衡延迟， 或 同时调整所述初始注册窗口和所述预均衡延迟；
并且， 所述收发单元， 还用于将所述调整单元调整后的预均衡延迟发送至 所述待注册光网絡单元， 并接收所述待注册光网絡单元根据所述调整后的预均 衡延时发送的注册信息， 并且与所述待注册光网络单元进行交互以对所述待注 册光网络单元进行注册。
7、 根据权利要求 6所述的光线路终端， 其特征在于， 还包括： 设置单元， 用于预先配置至少一个初始注册窗口以供所述待注册光网络单元进行注册； 所 述设置单元包括：
第一设置子单元， 用于预先配置一个用于提供给所述待注册光网络单元进 行注册的初始注册窗口， 其中所述初始注册窗口的大小满足离光线路终端最远 的待注册光网络单元的注册需要； 和 /或第二设置子单元，用于预先配置多个用 于提供给所述待注册光网络单元进行注册的初始注册窗口， 其中所述多个注册 窗口的大小分别与不同的待注册光网络单元至光线路终端的物理距离段相对 应。
8、 根据权利要求 6所述的光线路终端， 其特征在于， 所述测量单元包括： 记录子单元， 用于记录的从发送与所述初始注册窗口相适应的预均衡延迟 到接收到所述待注册光网络单元反馈的信息的总时间；
计算子单元， 用于将所述记录子单元记录的总时间减去所述预均衡延迟、 所述待注册光网络单元的固定延迟以及最大随机延迟以得到一剩余时间， 将所 述剩余时间和光在光纤中的传输速度作乘积， 并取所述乘积的结果的一半作为 所述待注册光网络单元至光线路终端的距离。
9、 根据权利要求 6至 8任一项所述的光线路终端， 其特征在于， 所述调 整单元包括： 第一调整子单元， 用于在所述待注册光网絡单元至光线路终端的物理距离 的最大差值在所述初始注册窗口对应的最大物理距离差之内， 且存在至少一个 待注册光网络单元至光线路终端的物理距离大于所述初始注册窗口所允许的 最大物理距离时， 调整所述预均衡延迟； 和 /或
第二调整子单元， 用于在所述待注册光网络单元至光线路终端的物理距离 的最大差值大于所述初始注册窗口对应的最大物理距离差， 且存在至少一个待 注册光网络单元至光线路终端的物理距离大于所述初始注册窗口所允许的最 大物理距离时， 同时调整所述设置单元设置的初始注册窗口和所述预均衡延 迟。
10、 一种无源光网络系统， 其特征在于， 包括光线路终端和待注册光网络 单元， 所述光线路终端和所述待注册光网络单元通过光分配网络以点到多点的 方式连接， 其中， 所述光线路终端， 用于将与预设初始注册窗口相适应的预均衡延迟发送至 所述待注册光网络单元，接收所述待注册光网络单元按照所述预均衡延迟反馈 的信息， 并对所述待测试光网絡单元进行测距， 并且根据测距结果， 调整所述 预均衡延迟并将调整后的预均衡延迟发送至所述待注册光网络单元， 或同时调 整所述初始注册窗口和所述预均衡延迟， 并将调整后的预均衡延迟发送至所述 待注册光网络单元， 并接收所述待注册光网络单元根据所述调整后的预均衡延 时发送的注册信息， 并且与所述待注册光网络单元进行交互以对所述待注册光 网络单元进行注册；
所述待注册光网络单元， 用于接收所述光线路终端提供的预均衡延时， 并 根据所述预均衡延时， 向所述光线路终端反馈对应的响应信息。
PCT/CN2010/079360 2009-12-18 2010-12-01 无源光网络的注册窗口调整方法、系统和装置 Ceased WO2011072575A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES10837012.3T ES2489471T3 (es) 2009-12-18 2010-12-01 Método, sistema y aparato para ajustar una ventana de registro en una red óptica pasiva
EP10837012.3A EP2487812B1 (en) 2009-12-18 2010-12-01 Registration window adjustment method, system and device for passive optical network (pon)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910261626.7 2009-12-18
CN200910261626.7A CN102104428B (zh) 2009-12-18 2009-12-18 无源光网络的注册窗口调整方法、系统和装置

Publications (1)

Publication Number Publication Date
WO2011072575A1 true WO2011072575A1 (zh) 2011-06-23

Family

ID=44156984

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/079360 Ceased WO2011072575A1 (zh) 2009-12-18 2010-12-01 无源光网络的注册窗口调整方法、系统和装置

Country Status (4)

Country Link
EP (1) EP2487812B1 (zh)
CN (1) CN102104428B (zh)
ES (1) ES2489471T3 (zh)
WO (1) WO2011072575A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103841475A (zh) * 2014-03-27 2014-06-04 上海斐讯数据通信技术有限公司 Epon系统远距离业务开通方法
CN112511918A (zh) * 2020-03-07 2021-03-16 中兴通讯股份有限公司 注册方法和设备、写信息方法、光线路终端、光网络单元

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107342973B (zh) * 2016-05-03 2021-07-20 中兴通讯股份有限公司 一种无源光网络的注册方法、装置和无源光网络系统
CN108242953B (zh) * 2016-12-26 2022-07-05 中兴通讯股份有限公司 一种onu测距方法、onu内部时延调整参数确定方法及装置
CN109495797B (zh) * 2017-09-13 2022-02-22 中兴通讯股份有限公司 一种无源光网络中onu的管理方法、olt和系统
WO2019134687A1 (en) * 2018-01-05 2019-07-11 Zte Corporation Adaptive signal processing in optical communications
CN110944247B (zh) * 2018-09-25 2022-06-17 中兴通讯股份有限公司 无源光网络系统的数据处理方法、装置及无源光网络系统
CN110324733B (zh) * 2019-06-26 2021-10-08 广东电网有限责任公司广州供电局 软件定义的设备连接方法、装置、onu设备和存储介质
CN112583475B (zh) * 2019-09-27 2022-08-19 华为技术有限公司 一种测试方法、光线路终端以及光网络终端
CN113973032B (zh) * 2020-07-23 2024-07-05 上海诺基亚贝尔股份有限公司 用于光通信的设备、方法、装置及计算机可读介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1244751A (zh) * 1998-08-06 2000-02-16 深圳市华为技术有限公司 无源光纤网络系统
CN101083589A (zh) * 2007-07-13 2007-12-05 华为技术有限公司 无源光网络中的终端检测认证方法、装置及操作管理系统
CN101399616A (zh) * 2007-09-25 2009-04-01 中兴通讯股份有限公司 一种吉比特无源光纤网络系统中均衡延迟预设方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2043286A1 (en) * 2007-09-26 2009-04-01 Nokia Siemens Networks Oy Method to equalize delays in an optical network

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1244751A (zh) * 1998-08-06 2000-02-16 深圳市华为技术有限公司 无源光纤网络系统
CN101083589A (zh) * 2007-07-13 2007-12-05 华为技术有限公司 无源光网络中的终端检测认证方法、装置及操作管理系统
CN101399616A (zh) * 2007-09-25 2009-04-01 中兴通讯股份有限公司 一种吉比特无源光纤网络系统中均衡延迟预设方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103841475A (zh) * 2014-03-27 2014-06-04 上海斐讯数据通信技术有限公司 Epon系统远距离业务开通方法
CN112511918A (zh) * 2020-03-07 2021-03-16 中兴通讯股份有限公司 注册方法和设备、写信息方法、光线路终端、光网络单元

Also Published As

Publication number Publication date
CN102104428B (zh) 2014-12-03
EP2487812A4 (en) 2013-05-22
CN102104428A (zh) 2011-06-22
EP2487812A1 (en) 2012-08-15
EP2487812B1 (en) 2014-06-04
ES2489471T3 (es) 2014-09-02

Similar Documents

Publication Publication Date Title
WO2011072575A1 (zh) 无源光网络的注册窗口调整方法、系统和装置
US7457542B2 (en) Optical access network system
CN102075820B (zh) 在无源光网络中测距的方法和装置
CN101836379B (zh) 光通信
CN101953119B (zh) 频带分配方法以及无源光通信网系统
CA3044720C (en) Passive optical network system, optical line terminal, and optical network unit
EP2169852A1 (en) A method, a system and an apparatus for realizing elongation of data transmission in a passive optical network
US20120288280A1 (en) Method, apparatus, and system for time synchronization on passive optical network
EP2389738B1 (en) Methods and systems for dynamic equalization delay passive optical networks
JP2020505848A (ja) 共通公衆無線インターフェース（ｃｐｒｉ）パッシブ光ネットワーク（ｐｏｎ）における同期誤差低減
CN110268650B (zh) 多信道无源光网络(pon)中的发现和注册
CN112313890A (zh) 多速率光网络单元(onu)激活
CN102301670B (zh) 无源光网络突发发送方法及接收机复位方法与装置
WO2009155830A1 (zh) 一种光接入系统的倒换方法、装置和系统
CN106664234B (zh) Wdm/tdm-pon系统和其发送开始时刻校正方法
WO2012130022A1 (zh) 嵌套无源光网络的测距方法及装置
JP2008199233A (ja) 光受信装置及び方法並びに局側光終端装置
JP6093281B2 (ja) 光通信システム、信号送信制御方法及び局側光回線終端装置
JP2011166328A (ja) 光伝送システム、局側光終端装置及び上り送信制御方法
WO2017197856A1 (zh) 数据通信方法、装置以及系统
CN1939020B (zh) 通信系统
WO2011147248A1 (zh) 一种pon拉远的方法及设备
CN102891721B (zh) 一种光突发交换obs网络的光突发接收方法及装置
EP4730836A1 (en) Method for controlling optical module by single board in olt and related apparatus
Yuang et al. Demonstration of a novel PON system with distributed real-time bandwidth allocation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10837012

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2010837012

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE