WO2010149094A1 - Procédé et système permettant de synchroniser une transmission montante dans un réseau optique passif - Google Patents

Procédé et système permettant de synchroniser une transmission montante dans un réseau optique passif Download PDF

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Publication number
WO2010149094A1
WO2010149094A1 PCT/CN2010/074705 CN2010074705W WO2010149094A1 WO 2010149094 A1 WO2010149094 A1 WO 2010149094A1 CN 2010074705 W CN2010074705 W CN 2010074705W WO 2010149094 A1 WO2010149094 A1 WO 2010149094A1
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WO
WIPO (PCT)
Prior art keywords
update
maximum
updated
value
information
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Application number
PCT/CN2010/074705
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English (en)
Chinese (zh)
Inventor
张伟良
耿丹
张德智
Original Assignee
中兴通讯股份有限公司
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Publication of WO2010149094A1 publication Critical patent/WO2010149094A1/fr

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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

Definitions

  • This paper deals with the field of communication wood, especially the method and system of medium synchronization uplink.
  • GPO Wood is an important wood branch in the (PO) family. Like other PO woods, GPO is also a god-like material.
  • the GPO consists of the optical terminal (p ca eTem a, O T), the user's light (p ca ewok , O J), and the light distribution ( p ca s b o ewok, O ), usually at most.
  • O consists of optical devices such as sheep chops, optical branches, and optical connectors. The physical connections between O T and O are provided.
  • the downlink direction is from OT to O)
  • the OJ receives all the OJ (OJ de ca o , O J- ) GPO encapsulation mode (GPO E caps ao ode, G )- ( o ), Assignment (A oca o ) - for yourself.
  • the upstream direction O J to O T
  • each O J is taught in the O T arrangement.
  • Each O J O T is the same, preventing the upstream teaching of each O J from O T, O T
  • the OOJOT is balanced, that is, each O is sent upstream, and the equalized segment that needs to be extended is sent back to the uplink, and all OJ uplinks are synchronized.
  • the OT first supports the most (most) OJ.
  • OT measurement The value of J ( od pdeay, RT ) , the value of the maximum equilibrium of all OJs ( qa za o eay, q )
  • the OJ is connected to the PO system, and OT measures the RT of OJ, and obtains the value of q of OJ (q, q ax-RT ,).
  • the wood problem to be solved is to provide a method and system for synchronizing uplinks, and to improve the uplink efficiency in the uplink synchronization.
  • this provides a medium-synchronous uplink, and the method includes the maximum value in (RT) of O).
  • the method Before the step of updating the RT q update information of the O T , the method includes the maximum value RT of the RT of all the previous O Js in the O T storage PO system and
  • OT periodically and/or irregularly measures some or all of the O in the PO system T, will be part or all of the O stored in the RT storage T ax comparison, if there is a measured RT greater than the OT stored, then the OT will store the RT update power greater than the stored RT in the measured RT
  • the maximum RT OT update RT q update information steps include the RT update, the OT update RT update maximum balance , updated maximum equilibrium
  • the q update of some or all of the O in the PO system will update the q work force q update information.
  • OT updated q Before the step of updating the information, the method includes
  • O T stores the maximum value of all RTs in all PO systems before the ax
  • the OT is connected to the O in the PO system to get the RT of the O and the RT and OT of the OT comparison O.
  • the RT of the core O is greater than the OT storage.
  • OT will store Xinli O's RT OT updated q
  • the method includes
  • O T stores the maximum value of RT in all RTs of all PO systems before RT ax
  • OT compares the RT of the O and the OT stores the RT.
  • the RT of the core O is equal to the RT of the OT.
  • the maximum value of all the RTs in the OT system is less than the OT. If yes, then OT will store the updated power in the PO system.
  • the maximum value of all RTs in the RT RT method is the same as T in the storage RT, storing the maximum equilibrium q of RT max
  • the steps of updating the TQ update information include the RT update, the maximum balance q of the RT update of the OT update, the maximum balance of the update q, the maximum balance of the update store, the maximum equilibrium of the update q, the q of all the OJs in the system.
  • Method includes T in storage Same, store the maximum equalization of RT ax q
  • the steps of the OT update RT q update information include the maximum balance of the maximum balanced update stored in the RT update of the RT update, the maximum balanced Eq update of the OT update. Maximum balance of stored updates Maximum balance before OT storage update The same to get q, will q force q update letter. OT will q update information all in the OJ step, OT is the same as Ra gg me) message will be updated q
  • O T will update the information in all the steps of O J , O T is the existing or new physical operation management P ) message will be q
  • All of the O P OAM4 messages in the at least include the following q and q values.
  • This provides a system for mid-synchronous uplinks, including terminals OT) and OTs, OTs including T and q, RT storage, and all RTs in the RT RT, q and RT ax updates, Will update the RT Eq
  • This terminal provides OT), which includes (RT) and equalization (q), where the RT stores the maximum value of all RTs in the PO system. q as well, RT update, will update RT q
  • the RT periodically and/or irregularly measures the RT of some or all of the O in the PO system, and compares the RT stored in the RT store. If there is a measured RT greater than the RT stored in the OT, the RT will be stored. The update power is greater than the maximum of the measured RT of the stored RT ax. RT near the new O or need PO and each O is connected to the PO system, received O in the PO system
  • Get the RT of O compare the RT of the O and the RT of the OT store.
  • the value of the RT of the core O is greater than the OT storage.
  • Update O RT and O or under the PO system compare O's RT and OT local storage , the RT of the kernel O is equal to the RT of the OT local storage.
  • the maximum RT q of all the OJ's RTs in the stored update power system is the value of the RT update maximum equalization q of the update mode update information update, all in the updated q PO system
  • the OJ's q update will update the q force q update information or, the updated RT update the maximum equilibrium q value, the updated maximum equilibrium q the maximum equilibrium before the update The same to get q, will q force q update letter.
  • the update of O T is all at the maximum RT of O J , and the maximum RT is updated by q of each O J , which can reduce the q of each O J and improve the uplink efficiency.
  • Step 301 OT PO system in all RT of the O, the maximum RT () maximum equilibrium , The value of q of each OJ Eq q ax-RT Step 302 In the PO system, the new update maximum balance of OT , update the q of each OJ.
  • the scheme OT stores all the OJ's T in the PO system, and stores the maximum RT TOT of all OJs in the PO system. Periodically and/or irregularly measuring all the OJ's RT in the PO system, the measurement result is in the PO system. Whether, if, new And out of the OJ's RT re-all in the o's q, will update the Eq all in the OJ
  • Solution O T stores all O J RTs in the PO system, and stores the maximum RT value of all O Js in the PO system and the maximum RT maximum q.
  • the new OJ needs OJ to PO system, OT measures the RT of OJ, compares the maximum RT of OJ's RT OT local storage, the RT of OJ is greater than the maximum RT of OT local storage, OT updates the maximum RT O of local storage.
  • RT, and OT update maximum RT maximal q, OT store updated maximum equalization q, OT pre-update and updated maximum Eq
  • OT compares the maximum RT of the RT OT local storage of OJ. If the RT of the OJ is equal to the maximum RT of the OT local storage, the OT compares the maximum RT value of the OJ with the maximum RT of the OT local storage. If the value of all the maximum RT in OJ is less than the maximum RT stored in OT local storage, OT updates the value of the maximum RT stored locally, the value of the maximum RT in OJ in the PO system, and the maximum RT of the OT update.
  • Maximum equalization q, OT storage Updated maximum equalization q, OT storage before update and updated maximum q OT updates the maximum stored RT and q values of the local storage, all the information in J, the updated Eq information OJ, the OJ that receives the updated q information updates the local q, and synchronizes the updated q according to the q.
  • the q information of O T O J may be the updated Eq of O J or the q required by O J . Among them, O T can update the q value of O J respectively, or all the q required in O J .
  • O T can create a new physical operation management (Physca aye Ope a o s Adm s a o a d a e a c , P OAM4) message in the same way as all q required in O J .
  • the method for synchronizing the uplink in the present element mainly includes the following step 101, the OT is completed every OJ, the OT stores the value of the OJ, and the OT stores the value of the maximum RT of the RT of all the previous OJs in the PO system.
  • Step 102 The OT periodically and/or irregularly measures all the OJ's RTs in the PO system, and compares all the OJ's RTs, the stored RTs, and the OJ's RTs, which are greater than the OT local storage. , then OT will locally store the maximum RT update power out of the value of RT, the value of step 103, the OT update RT update q, the updated and re-out RT, the value of q of each OJ is updated by the following formula Qq aX-RT Step 104, OT will update the value of q of each OJ all OJ, OJ in the synchronized q synchronization uplink.
  • the OT can also be used for the old cycle of each O, and the measurement of the partial O RT is required. The steps in the measurement step are exactly the same, and are not used here.
  • O T is completed by O, O T stores the RT of O, and O T stores the value of the maximum RT value RT and T of the RT in the RT of all PO systems.
  • Step O T is newly connected to O in the PO system, and gets the RT of O.
  • Step the OT stores the value of the RT of the O, compares the value of the RT of the O and the OT local storage , fruit O
  • the OT stores the updated value, and can store the updated q OT storage before the update q with the same value of the RT of the RT is less than or equal to the OT local storage, Then OT and O directly perform the steps
  • Step, O T can update the PO system in the next way.
  • the OT will store the updated q OT stored in the step with the q before the update, that is, the information of the q required by each O,
  • the P M4 message shown in 1 is all shown in the working O, d 1 , and the P OA message of qas includes the partial composition, the first part O
  • Step 2 the new OJ q of the PO system, the q OOJ of O receives the storage OT body q, the work steps, all the working OJs are synchronized according to the locally updated q .
  • the PO system has the OJ, OT and OJ methods to complete all the upstream OJ synchronization OT comparison OJ T, the value and OT local storage If the value of RT of OJ is equal to OT local storage, then OT compares all current RTs of working OJ, and OT stores RT, and the current maximum RT of all working O is less than OT. Locally stored RT OT will be local.
  • the stored RT update power is currently all working on the OJ RT, the largest RT in the update, Updated value, can, can store updated OT storage before the update q same, OT and O execution steps and steps and steps and steps and steps and steps and steps and steps
  • OJ's RT is less than the OT local storage RT, or the current maximum RT of all working OJs is equal to OT local storage. , then OT and OJ do nothing.
  • the medium provides a synchronous uplink system, including OT and OJ, the OT step includes RT and q, where RT stores PO) all the OJ's largest forest RT in the system), q and, Update, will update the RT q
  • OT which includes (RT) and equalization (Eq), where the RT stores a PO) all in the RT of the light
  • Eq equalization
  • the RT can store and update the RT of all OJs in the OT local storage PO system periodically and/or irregularly to measure some or all of the OJ's RT in the PO system, and the RT storage will be output. RT comparison, the value of the RT is greater than the OT local storage , then update the local storage The value of the RT.
  • the RT can also store and update all of the OJ's RTs in all PO systems before the OT local storage in the RT mode.
  • each OqJ is connected to the PO system.
  • the OJ in the PO system receives the value of the OJ RT, compares the value of the OJ RT and the OT local storage. , fruit core O
  • the PO system compare the value of RT of OJ and RT of OT local storage, and the value of RT of O core of OqJ is equal to the RT ax of OT local storage, then the maximum RT of all OJs in the PO system Is it less than the OT local storage RT, if it is, then update the local storage The maximum RT of all OJs in the PO system.
  • the next mode q update information updates the value of the RT update q, the updated q PO system all the OJ's q update, the updated q force q update information O or, the updated RT Update the value of q, updated Before the update In the same way, will be updated to update all the information in O.
  • the instructions are completed by hardware, and the program can be stored in a storable memory, only memory, or the like. Yes, all or part of the steps can also be used or integrated.
  • Each of the phases / sheep can be in the form of hardware or in the form of software functions. This is not limited to any specific form of hardware or software combination.
  • T updates all the maximum T in J
  • the maximum RT updates each q of q, which can reduce the q of each O J and improve the uplink efficiency.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

La présente invention se rapporte à un procédé permettant de synchroniser une transmission montante dans un réseau optique passif. Le procédé comprend les étapes suivantes : un terminal de ligne optique (OLT) détermine un retard d'égalisation maximal (EqDmax) selon le temps maximal (RTDmax) des temps de propagation aller-retour (RTD) de toutes les unités de réseau optique (ONU) en ligne dans un système de réseau optique passif (PON) et calcule des valeurs de retard d'égalisation (EqD) de toutes les unités ONU selon le retard d'égalisation maximal (EqDmax) ; lorsque le temps RTDmax est mis à jour, le terminal OLT calcule des informations de mise à jour de retard EqD selon le temps RTDmax mis à jour ; le terminal OLT envoie les informations de mise à jour de retard EqD à toutes les unités ONU en ligne et l'unité ONU met à jour la valeur du retard EqD selon les informations de mise à jour de retard EqD reçues et synchronise ensuite une transmission montante selon la valeur mise à jour du retard EqD. La présente invention se rapporte également à un système permettant de synchroniser une transmission montante dans un réseau optique passif et à un réseau OLT. La présente invention améliore l'efficacité d'une transmission montante.
PCT/CN2010/074705 2009-11-25 2010-06-29 Procédé et système permettant de synchroniser une transmission montante dans un réseau optique passif WO2010149094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910178393.4A CN102075277B (zh) 2009-11-25 2009-11-25 一种无源光网络中同步上行传输的方法及系统
CN200910178393.4 2009-11-25

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CN106301642B (zh) * 2015-05-14 2018-11-09 深圳市中兴微电子技术有限公司 一种无源光网络系统的时钟同步方法及装置
CN113727218B (zh) * 2020-05-25 2023-03-31 中国电信股份有限公司 设置静态窗口长度的方法及相关设备

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CN1433192A (zh) * 2002-01-17 2003-07-30 三星电子株式会社 千兆以太网无源光网络中实现多种功能的方法及帧结构
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