CN1186889C - Method for respectively treating diffevent state grade subscriber in ethernet passive optical network - Google Patents
Method for respectively treating diffevent state grade subscriber in ethernet passive optical network Download PDFInfo
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- CN1186889C CN1186889C CNB021007608A CN02100760A CN1186889C CN 1186889 C CN1186889 C CN 1186889C CN B021007608 A CNB021007608 A CN B021007608A CN 02100760 A CN02100760 A CN 02100760A CN 1186889 C CN1186889 C CN 1186889C
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Abstract
The present invention discloses a method for respectively treating different state grade subscribers in an Ethernet passive optical network, which comprises the following steps that: an optical network unit record is orderly and periodically polled and read by an optical line terminal; a corresponding message and data with appointed length of the optical network unit are received at the appointed time, and are recorded, and an operating parameter of each optical network unit and a system device are recorded; the content of the sent message is ascertained according to the operating parameters and the system device, and the record of the optical network unit is modified according to the sent message content. The present invention has the advantages that because an optical network unit state and a grade are processed according to different time cycles, in the arrangement of a subscriber grade, the subscriber grade is not simply divided into a plurality of levels, but is provided with a plurality of parameters. The requirement of the subscriber is satisfied, the occupied time of invalid data is reduced, and the bandwidth utilization is enhanced.
Description
Technical field
The present invention relates to the method for data communication in the digital communication network, relate more specifically to utilize the time-division Multiplexing Technology to be implemented in the method for in the Ethernet passive optical network different conditions rank user being handled respectively.
Background technology
Ethernet passive optical network (EPON) is the access that utilizes the topological structure realization Ethernet of EPON (PON).At present, this technology is in conceptual phase, and the practical technique of this respect is not also arranged.The APON (ATM-PON) (asynchronous transfer mode EPON) that has similarly can do contrast.The APON system comes work according to system mode, and range finding is a special operating state, in this state, can only find range to the user, and the user that can not allow to have found range sends upstream data.After finishing range finding, change the transmission data mode over to, system could operate as normal.For monitoring at any time increases the user newly, need between two states, frequently to switch, and when switching, indication to be assigned in the center, because the delay of optical fiber can be waste for some time, has reduced bandwidth utilization.And normal active user is not distinguished whether the upstream data transmission is arranged, distribute fixed-bandwidth, do same treatment, can waste bandwidth.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art,, should avoid invalid data to transmit, as far as possible to improve bandwidth availability ratio based on a plurality of optical network units (ONU) shared bandwidth.The state of optical network unit (ONU) is different with rank, its desired processing time frequency and bandwidth are also different, system if can handle respectively by User Status and rank, then can improve bandwidth availability ratio, and adapt to the different demands of different stage user to bandwidth, for this reason, the present invention proposes the method for in Ethernet passive optical network, different conditions rank user being handled respectively.
The method of in Ethernet passive optical network different conditions rank user being handled respectively of the present invention realizes by the following technical solutions, by optical line terminal OLT, in the Ethernet passive optical network EPON data transmission system that Optical Distribution Network ODN and a plurality of optical network unit ONU constitute, wherein optical line terminal OLT is positioned at local side, optical network unit ONU is positioned at user side, a plurality of optical network unit ONU are shared the optical fiber between optical line terminal OLT and Optical Distribution Network ODN, optical line terminal OLT is a down direction to the direction of optical network unit ONU, otherwise be up direction, down direction adopts broadcast mode to send data, up direction adopts time division multiple access TDMA mode to send data, described optical line terminal OLT comprises sending module and receiver module, control time and the window size that each optical network unit ONU sends data by optical line terminal OLT, the time that makes data arrive Optical Distribution Network ODN staggers each other, avoid conflict, described method may further comprise the steps:
The optical line terminal OLT sending module is poll and read the optical network unit ONU record periodically in regular turn;
The optical line terminal OLT sending module is provided with the content of determining to send message according to the running parameter and the system of optical network unit ONU, described running parameter comprises three kinds of operating states, the count value that is untreated C1 and does not have upstream data count value C2, the setting of described system comprises each send window size W, presence is not handled gap periods and counted the periodicity D3 that D1, no upstream data state processing gap periods count D2 and the no upstream data of judgement, and they have embodied optical network unit ONU user's rank;
The optical line terminal OLT sending module is according to the record of the content modification optical network unit ONU that sends message;
Optical network unit ONU is accepted the downlink command of optical line terminal OLT and is made response, sends upstream message;
The optical line terminal OLT receiver module is revised the operating state in the optical network unit ONU record specifying reception constantly from the corresponding message of optical network unit ONU transmission and the data of designated length.
The described cycle is meant that poll is handled all optical network units (ONU) in regular turn and once calculates one-period, can handle by the different cycles the user of different conditions.
Described three kinds of operating states are: not online, operate as normal but do not have upstream data and operate as normal.
Described user to different conditions can handle further by the different cycles and comprise: at presence not, if C1 equals D1, then explanation at interval the periodicity D1 of appointment, should send range finding message, simultaneously the C1 zero clearing; Otherwise do not send message, C1 adds 1 simultaneously.In operate as normal but there is not the upstream data state, if C1 equals D2, then explanation at interval the periodicity D2 of appointment, should send authorization messages, simultaneously the C1 zero clearing, otherwise do not send message, the while, C1 added 1.In normal operating conditions, all send out authorization messages at every turn.The length of specifying optical network unit ONU to send in authorization messages, corresponding to the requirement of optical network unit ONU to bandwidth, the gap periods D1 of processing, D2 then are the requirement of optical network unit ONU to real-time processing.
Advantage of the present invention is owing to the state according to optical network unit ONU goes to handle by the different time cycles with rank, can satisfy user's requirement, has reduced the time that invalid data takies again, has improved bandwidth availability ratio.To in being provided with of user class, not what simply is divided into, but a plurality of parameters arranged that more horn of plenty is careful to make rank, fully satisfies requirements of different users.
Description of drawings
Further specify method content of the present invention and advantage below in conjunction with accompanying drawing.
Fig. 1 is an Ethernet passive optical network structural representation of realizing the inventive method;
Fig. 2 is a workflow diagram of realizing the Ethernet passive optical network system of the inventive method.
Specific embodiment
Fig. 1 is an Ethernet passive optical network structural representation of realizing the inventive method.As shown in Figure 1, mainly be divided into three parts, promptly optical line terminal (OLT) (Optical LineTermination), Optical Distribution Network (ODN) (Optical Distribution Network) and optical network unit (ONU) (optical network unit) are formed.In Ethernet passive optical network (EPON) data transmission system that constitutes by optical line terminal (OLT), Optical Distribution Network (ODN) and a plurality of optical network unit (ONU), wherein optical line terminal (OLT) is positioned at local side, optical network unit (ONU) is positioned at user side, and a plurality of optical network units (ONU) are shared the optical fiber between optical line terminal (OLT) and Optical Distribution Network (ODN).Optical line terminal (OLT) is a down direction to the direction of optical network unit (ONU), otherwise is up direction.Down direction adopts broadcast mode to send data, up direction adopts time division multiple access (TDMA) mode to send data, described optical line terminal (OLT) comprises sending module and receiver module, control time and the window size that each optical network unit (ONU) sends data by optical line terminal (OLT), the time that makes data arrive Optical Distribution Network (ODN) staggers each other, avoid conflict, the function of each several part is as follows:
1. optical line terminal (OLT): as the core of EPON, optical line terminal (OLT) should be realized following function.
◆ send Ethernet data to optical network unit (ONU) with broadcast mode.
◆ initiate and the control ranging process, and the record ranging information.
◆ for optical network unit (ONU) distributes bandwidth, promptly control zero-time and send window size that optical network unit (ONU) sends data.
◆ the ethernet feature that other is relevant.
2. Optical Distribution Network (ODN): constitute by passive optical splitter and optical fiber, realize distribution and the merging of light signal in optical fiber.
3. optical network unit (ONU): the function that optical network unit (ONU) provides EPON to insert for the user.
◆ the broadcast data that selective reception optical line terminal (OLT) sends.
◆ the control commands such as range finding that response light line terminal (OLT) sends, and do corresponding the adjustment.
◆ the Ethernet data to the user carries out buffer memory, and sends to up direction in the send window that optical line terminal (OLT) distributes.
◆ the ethernet feature that other is relevant.
Fig. 2 is the workflow diagram of Ethernet passive optical network system.As shown in Figure 2, this system comprises optical line terminal (OLT) and optical network unit (ONU) terminal device, wherein optical line terminal (OLT) is divided into transmission and receiver module again, two module concurrent workings, get in touch by optical network unit (ONU) record, comprise operating state and system's setting of optical network unit (ONU) in the record.In this workflow diagram, upper left is the workflow of the sending module of optical line terminal (OLT), and bottom left section is the workflow of the receiver module of optical line terminal (OLT), and right half part is the workflow of optical network unit (ONU).The method of in Ethernet passive optical network different conditions rank user being handled respectively may further comprise the steps:
Optical line terminal (OLT) sending module is poll and read optical network unit (ONU) record periodically in regular turn;
Optical line terminal (OLT) sending module is provided with the content of determining to send message according to the running parameter and the system of optical network unit (ONU);
Optical line terminal (OLT) sending module is according to the record of the content modification optical network unit (ONU) that sends message.
Optical network unit (ONU) is accepted the downlink command of optical line terminal (OLT) and is made response, sends upstream message.
Optical line terminal (OLT) receiver module is revised the operating state in optical network unit (ONU) record specifying reception constantly from the corresponding message of optical network unit (ONU) transmission and the data of designated length.
The described cycle is meant that poll is handled all optical network units (ONU) in regular turn and once calculates one-period, can handle by the different cycles the user of different conditions.As operate as normal and user that upstream data arranged weekly the phase handle once, operate as normal but do not have the user of upstream data can several period treatment once, not online user can tens or up to a hundred period treatment once, specifically can be by the maintenance system setting.In optical line terminal (OLT), establish a record, write down running parameter and system's setting of each optical network unit (ONU).Running parameter comprises the value C1 of state (not online, operate as normal but do not have upstream data, operate as normal), the counter that is untreated and does not have value C2 of upstream data counter etc., system's setting comprises each send window size W, presence is not handled gap periods and counted the periodicity D3 etc. that D1, no upstream data state processing gap periods count D2 and the no upstream data of judgement, and they have embodied optical network unit (ONU) user's rank.
At the sending module of optical line terminal (OLT), read optical network unit (ONU) record in regular turn, according to circumstances make different disposal.At presence not, if C1 equals D1, then explanation at interval the periodicity D1 of appointment, should send range finding message, simultaneously the C1 zero clearing; Otherwise do not send message, C1 adds 1 simultaneously.In operate as normal but there is not the upstream data state, if C1 equals D2, then explanation at interval the periodicity D2 of appointment, should send authorization messages, simultaneously the C1 zero clearing; Otherwise do not send message, C1 adds 1 simultaneously.In normal operating conditions, all send out authorization messages at every turn.The length of in authorization messages, specifying optical network unit (ONU) to send, corresponding to the requirement of optical network unit (ONU) to bandwidth, the gap periods D1, the D2 that handle then are the requirement of optical network unit (ONU) to real-time processing, and this two aspect has embodied the rank of optical network unit (ONU).
At the receiver module of optical line terminal (OLT), specifying the upstream message that receives optical network unit (ONU) constantly, if confiscate, then this optical network unit (ONU) enters not presence; If no upstream data, the value C2 that does not then have the upstream data counter adds 1, and when C2 equaled to judge the periodicity D3 of no upstream data, promptly continuous D3 cycle do not have upstream data, then enters operate as normal but does not have the upstream data state; Upstream message and data then enter normal operating conditions if receive.
The work of optical network unit (ONU) is comparatively simple, just makes response at the downlink command of optical line terminal (OLT), accepts to handle the downlink command of optical line terminal (OLT), is specifying the data that send designated length constantly.
More than describe and only provide implementation method of the present invention by means of embodiment.For those skilled in the art is conspicuous, and the implementation detail that the invention is not restricted to provide above can realize with additional embodiments under the situation that does not break away from feature of the present invention.Therefore, it is illustrative that the embodiment that provides should be considered to, rather than restrictive.Therefore, it is defined by the appended claims realizing and use possibility of the present invention.Thereby the realization various selections of being determined by claim of the present invention comprise that equivalent embodiment also belongs to scope of the present invention.
Claims (4)
1. the method for in Ethernet passive optical network, different conditions rank user being handled respectively, it is characterized in that: by optical line terminal OLT, in the Ethernet passive optical network EPON data transmission system that Optical Distribution Network ODN and a plurality of optical network unit ONU constitute, wherein optical line terminal OLT is positioned at local side, optical network unit ONU is positioned at user side, a plurality of optical network unit ONU are shared the optical fiber between optical line terminal OLT and Optical Distribution Network ODN, optical line terminal OLT is a down direction to the direction of optical network unit ONU, otherwise be up direction, down direction adopts broadcast mode to send data, up direction adopts time division multiple access TDMA mode to send data, described optical line terminal OLT comprises sending module and receiver module, control time and the window size that each optical network unit ONU sends data by optical line terminal OLT, the time that makes data arrive Optical Distribution Network ODN staggers each other, avoid conflict, described method may further comprise the steps:
The optical line terminal OLT sending module is poll and read the optical network unit ONU record periodically in regular turn;
The optical line terminal OLT sending module is provided with the content of determining to send message according to the running parameter and the system of optical network unit ONU, described running parameter comprises three kinds of operating states, the count value that is untreated C1 and does not have upstream data count value C2, the setting of described system comprises each send window size W, presence is not handled gap periods and counted the periodicity D3 that D1, no upstream data state processing gap periods count D2 and the no upstream data of judgement, and they have embodied optical network unit ONU user's rank;
The optical line terminal OLT sending module is according to the record of the content modification optical network unit ONU that sends message;
Optical network unit ONU is accepted the downlink command of optical line terminal OLT and is made response, sends upstream message;
The optical line terminal OLT receiver module is revised the operating state in the optical network unit ONU record specifying reception constantly from the corresponding message of optical network unit ONU transmission and the data of designated length.
2, method according to claim 1 is characterized in that: the described cycle is meant that poll is handled all optical network unit ONU in regular turn and once calculates one-period, can handle by the different cycles the user of different conditions.
3, method according to claim 1 and 2 is characterized in that: described three kinds of operating states are: not online, operate as normal but do not have upstream data and operate as normal.
4, method according to claim 3, it is characterized in that: described user to different conditions can handle further by the different cycles and comprise: at presence not, if C1 equals D1, then explanation at interval the periodicity D1 of appointment, should send range finding message, simultaneously the C1 zero clearing; Otherwise do not send message, C1 adds 1 simultaneously; In operate as normal but there is not the upstream data state, if C1 equals D2, then explanation at interval the periodicity D2 of appointment, should send authorization messages, simultaneously the C1 zero clearing, otherwise do not send message, the while, C1 added 1; In normal operating conditions, all send out authorization messages at every turn, the length of specifying optical network unit (ONU) to send in authorization messages, corresponding to the requirement of optical network unit ONU to bandwidth, the gap periods D1 of processing, D2 then are the requirement of optical network unit ONU to real-time processing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021007608A CN1186889C (en) | 2002-01-25 | 2002-01-25 | Method for respectively treating diffevent state grade subscriber in ethernet passive optical network |
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| CNB021007608A CN1186889C (en) | 2002-01-25 | 2002-01-25 | Method for respectively treating diffevent state grade subscriber in ethernet passive optical network |
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| CN1186889C true CN1186889C (en) | 2005-01-26 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100651364B1 (en) | 2002-03-11 | 2006-11-28 | 삼성전자주식회사 | Method for allocating the transmission bandwidth in gigabit ethernet passive optical network |
| CN1326340C (en) * | 2003-10-21 | 2007-07-11 | 华为技术有限公司 | Passive optical network dynamic bandwide distributing apparatus and method |
| CN1859051B (en) * | 2005-11-04 | 2011-01-05 | 华为技术有限公司 | Method and system for transmitting time division multiplex service |
| CN101154996B (en) * | 2006-09-30 | 2012-07-11 | 华为技术有限公司 | Optical network unit and its access method, optical line terminal and passive optical network system |
| CN101378388B (en) * | 2007-08-28 | 2012-10-03 | 华为技术有限公司 | Method, system and equipment for transmitting passive optical network data |
| CN101494577B (en) * | 2008-01-21 | 2011-07-27 | 杭州华三通信技术有限公司 | Coaxial line terminal, coaxial network unit and control method for acceptance window |
| JP7380218B2 (en) * | 2017-11-22 | 2023-11-15 | 住友電気工業株式会社 | PON system |
| CN114257890A (en) * | 2021-12-22 | 2022-03-29 | 芯河半导体科技(无锡)有限公司 | Method for dynamically adjusting issued bandwidth by EDBA |
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