CN101399616B - Balance delay presetting method in Gbit passive optical fiber network - Google Patents

Balance delay presetting method in Gbit passive optical fiber network Download PDF

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CN101399616B
CN101399616B CN 200710154695 CN200710154695A CN101399616B CN 101399616 B CN101399616 B CN 101399616B CN 200710154695 CN200710154695 CN 200710154695 CN 200710154695 A CN200710154695 A CN 200710154695A CN 101399616 B CN101399616 B CN 101399616B
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upstream
optical network
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onu
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CN101399616A (en
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张伟良
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中兴通讯股份有限公司
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Abstract

本发明公开了一种吉比特无源光纤网络系统中均衡延迟预设方法,步骤包括:光传输线路终端通过单播Upstream_Overhead消息预设光网络单元的均衡延迟,所述Upstream_Overhead消息支持所述光网络单元的均衡延迟预设;所述光网络单元根据所述Upstream_Overhead消息中的参数预设均衡延迟;所述光传输线路终端对所述光网络单元进行测距,获得精确的均衡延迟,并将所述精确的均衡延迟发送给所述光网络单元;所述光网络单元根据所述精确的均衡延迟调整上行帧时钟。 The present invention discloses a Gigabit passive optical network system equalization delay preset method, comprising the step of: equalizing an optical line terminal preset by the optical network unit delay Upstream_Overhead unicast message, the message supporting the optical network Upstream_Overhead equalization unit a predetermined delay; delay of the optical network unit based on the parameters in the message Upstream_Overhead preset equalization; said optical transmission line terminal to the optical network unit for ranging, to obtain accurate equalization delay, and the said accurate equalization delay of the optical network unit to transmit; the ONU uplink frame clock delay adjustment in accordance with the precise equalization. 本发明通过改进Upstream_Overhead消息,实现了对单个ONU进行均衡延迟预设。 The present invention is improved by Upstream_Overhead message, the realization of a single ONU for equalization delay preset.

Description

一种吉比特无源光纤网络系统中均衡延迟预设方法 One kind Gigabit passive optical network system equalization delay preset Method

技术领域 FIELD

[0001] 本发明涉及一种宽带光接入技术,尤其涉及一种吉比特无源光纤网络(GPON)系统中均衡延迟预设方法。 [0001] The present invention relates to a broadband optical access technology, particularly, to a Gigabit Passive Optical Network (GPON) system equalization delay preset method.

背景技术 Background technique

[0002]在吉比特无源光纤网络(GPON, Gigabit Passive Optical Network)系统中,一个光传输线路终端(OLT)下通过光分路器可以连接多个光网络单元(ONU),各个ONU到OLT的距离不一样,为避免ONU向OLT发送的光信号发生冲突,每个ONU都应该有相应的均衡延迟,使得各ONU到OLT的距离显得相同。 [0002] In gigabit passive optical network (GPON, Gigabit Passive Optical Network) system, may be connected to a plurality of optical network units (ONU) by an optical splitter at an optical line terminal (OLT), OLT to each ONU the distance is not the same, a conflict optical signal sent by the OLT to the ONU in order to avoid, each ONU should have a respective equalization delay, so that the distance from the OLT to each ONU appear the same.

[0003] 在ONU激活过程中,OLT首先需要预设ONU的均衡延迟,以尽量减少ONU之间的冲突,ONU注册成功后,OLT还需对ONU进行精确测距,获得精确的均衡延迟。 [0003] In the process ONU activation, the OLT needs a predetermined first equalization delay of the ONU, to minimize the conflict between the ONU, the ONU registration is successful, the OLT to the ONU precise range needed to obtain accurate equalization delay.

[0004] 但是,在现有的G. 984. 3标准中,均衡延迟的预设都是通过广播消息实现的,当多数ONU稳定工作时需要改变某个特定ONU的均衡延迟,当采用广播的均衡延迟预设方式时,会对正常工作的ONU有影响。 [0004] However, in the conventional standard G. 984. 3, the equalization delay preset is achieved via a broadcast message, when most stable operation ONU needs to be changed for a particular ONU equalization delay, when using broadcast when equalization delay preset mode, ONU will work properly affected.

发明内容 SUMMARY

[0005] 本发明所解决的技术问题是提供一种吉比特无源光纤网络系统中均衡延迟预设方法,能够对单个ONU进行均衡延迟预设。 [0005] The technical problem solved by the present invention is to provide a gigabit passive optical network system equalization delay preset method, a single ONU can be equalized predetermined delay.

[0006] 技术方案如下: [0006] The technical solutions are as follows:

[0007] 一种吉比特无源光纤网络系统中均衡延迟预设方法,步骤包括: [0007] A Gigabit Passive Optical Network system equalization delay preset method, comprising the step of:

[0008] (I)光传输线路终端通过单播Upstream_Overhead消息预设特定光网络单元的均衡延迟,所述Upstream_Overhead消息支持所述特定光网络单元的均衡延迟预设; [0008] (I) an optical transmission line terminal preset specific optical network unit via a unicast message Upstream_Overhead equalization delay, the message Upstream_Overhead support equalizer said specific optical network unit of the preset delay;

[0009] (2)所述光网络单元根据所述Upstream_Overhead消息中的参数预设均衡延迟; [0009] (2) The optical network unit according to the equalization delay preset Upstream_Overhead message parameters;

[0010] (3)所述光传输线路终端对所述光网络单元进行测距,获得精确的均衡延迟,并将所述精确的均衡延迟发送给所述光网络单元; [0010] (3) The optical transmission line of the optical network terminal ranging unit, to obtain an accurate equalization delay, and the accurate equalization delay of the optical network unit to transmit;

[0011] (4)所述光网络单元根据所述精确的均衡延迟调整上行帧时钟。 [0011] (4) adjusting the delay of the ONU according to the uplink frame clock accurate equalization.

[0012] 进一步,步骤(I)中,对所述Upstream_Overhead消息的第I字节进行改进,将所述Upstream_Overhead消息的光网络单元识别符扩展成支持特定光网络单元的光网络单元识别符。 [0012] Further, step (I) in the first byte of the I Upstream_Overhead improved message, the identifier of the optical network unit Upstream_Overhead message is extended to support a particular optical network unit is an optical network element identifier.

[0013] 进一步,步骤(I)中,改进后的所述Upstream_Overhead消息第I字节支持广播ONU-ID和特定ONU的ONU-ID ;当所述第I字节的内容为“ 11111111”时,所述Upstream_Overhead消息为广播消息,用于所有ONU接收和处理;当所述第I字节的内容为“11111111”以外的值时,所述Upstream_Overhead消息为发给特定ONU的消息,当所述ONU-ID值与Upstream_Overhead消息第I字节内容一致时,所述特定的ONU接收并处理所述Upstream_Overhead 消息。 [0013] Further, step (I), the message Upstream_Overhead byte I of the improved support broadcast and ONU-ID ONU-ID of the particular ONU; I when the content of the first byte is "11111111", Upstream_Overhead the message is a broadcast message, all ONU for receiving and processing; I when the content of the first byte of value other than "11111111", the message is sent to a specific ONU Upstream_Overhead message, when the ONU -ID Upstream_Overhead value of I byte message contents coincident, the particular ONU receives and processes the message Upstream_Overhead.

[0014] 进一步,步骤⑵中,将第10字节中的“e”比特设置为1,表示所述UpStream_Overhead消息中包含均衡延迟预设;然后将均衡延迟预设值写入第11字节和第12字节。 [0014] Further, in step ⑵, the first 10 bytes of the "e" bit is set to 1, indicating that the message includes UpStream_Overhead equalization delay preset; equalization delay preset value and then written to the first byte 11 The first 12 bytes.

[0015] 本发明通过改进Upstream_Overhead消息,使得OLT、ONU支持单播方式的均衡延迟预设,实现对单个ONU进行均衡延迟预设。 [0015] The present invention is improved by Upstream_Overhead message, so that OLT, ONU supports unicast equalization delay preset to achieve equalization delay preset for a single ONU.

附图说明 BRIEF DESCRIPTION

[0016] 图I是本发明方法优选实施例的流程图。 [0016] Figure I is a flowchart of an embodiment of the method of the present invention is preferred.

具体实施方式 Detailed ways

[0017] 本发明中,通过改进Upstream_Overhead消息,使得GPON系统支持对特定的ONU进行均衡延迟预设。 [0017] In the present invention, by improving Upstream_Overhead message, such that the GPON system supports equalization delay preset specific ONU. 改进的Upstream_Overhead消息主要体现在在第I字节,从原来的广播ONU-ID (ONU识别符)扩展成支持特定ONU的ONU-ID,即:改进前第I字节的内容为固定的“11111111”(广播0NU-ID),改进后第I字节的内容为“ONU-ID or 11111111”,如表I所示,其中ONU-ID 指特定ONU 的0NU-ID(11111111 以外的值,如1100110011 等 Improved message Upstream_Overhead mainly in the first byte of I, extended from the original broadcast ONU-ID (identifier ONU) to support a particular ONU ONU-ID, i.e.: I Improvement content before a fixed byte "11111111 "(broadcast 0NU-ID), the contents of byte I of the improved as" ONU-ID or 11111111 ", as shown in table I, wherein the ONU-ID refers to a particular ONU 0NU-ID (other than the value 11111111, as 1100110011 Wait

指广播ONU-ID。 It refers to a broadcasting ONU-ID.

[0018] 改进后的Upstream_Overhead消息,如表I所示: [0018] Upstream_Overhead message improved, as shown in Table I:

[0019] [0019]

Figure CN101399616BD00051

[0020] [0020]

Figure CN101399616BD00052

[0021] 改进后的Upstream—Overhead消息第I字节可以支持广播0NU-ID,也可以支持特定ONU的0NU-ID。 [0021] Upstream-Overhead message byte I of the improved support broadcast 0NU-ID, may be supported particular ONU 0NU-ID. 当第I字节的内容为“11111111”时,Upstream—Overhead消息为广播消息,所有ONU都可以接收并处理;当第I字节的内容为11111111以外的值(即特定ONU的ONU-ID)时,Upstream_Overhead消息为发给特定ONU的消息,只有ONU-ID值与Upstream_Overhead消息第I字节内容一致时,该特定的ONU才能接收并处理。 When the contents of the first byte I is "11111111", Upstream-Overhead message is a broadcast message, all ONU can receive and process; I when the contents of the first byte of value other than 11111111 (i.e., particular ONU ONU-ID) when, as a message sent to a specific ONU Upstream_Overhead message, only ONU-ID and the value of I byte message contents Upstream_Overhead coincident, the particular ONU to receive and process.

[0022] 参照图I所示,对本发明具体的应用场景予以详细说明。 [0022] Referring to FIG I, is to be described in detail a specific application scenario according to the present invention.

[0023] 步骤SlOl :0LT通过单播Upstream_Overhead消息预设特定ONU的均衡延迟。 [0023] Step SlOl: 0LT via a unicast message Upstream_Overhead equalization delay preset particular ONU.

[0024] 步骤S102 :0NU根据Upstream_Overhead消息中的参数预设均衡延迟。 [0024] Step S102: 0NU Upstream_Overhead delay parameters in the message according to a preset equilibrium.

[0025] Upstream_Overhead消息预设均衡延迟的方法为:将第10字节中的“e”比特设置为I,表示该Upstream_Overhead消息中包含均衡延迟预设;然后将均衡延迟预设值写入第 [0025] The method of equalization delay preset Upstream_Overhead message is as follows: the first 10 bytes of the "e" bit is set to I, indicating that the message contains Upstream_Overhead equalization delay preset; equalization delay preset value is then written to the first

11、12字节。 11, 12 bytes. [0026] 步骤S103 =OLT对该ONU进行测距,获得精确的均衡延迟。 [0026] Step S103 = OLT to the ONU for the ranging, to obtain accurate equalization delay.

[0027] 步骤S104 =OLT将精确的均衡延迟发送给该0NU。 [0027] Step S104 = OLT transmits the accurate equalization delay to the 0NU.

[0028] 步骤S105 =ONU根据精确的均衡延迟调整上行帧时钟。 [0028] Step S105 = ONU uplink frame clock delay adjustment depending on the exact equalization.

Claims (3)

1. 一种吉比特无源光纤网络系统中均衡延迟预设方法,步骤包括: (1)光传输线路终端通过单播Upstream_Overhead消息预设特定光网络单元ONU的均衡延迟,所述Upstream_Overhead消息支持所述特定光网络单元的均衡延迟预设;对所述Upstream_Overhead消息的第I字节进行改进,将所述Upstream_Overhead消息的光网络单元识别符扩展成支持特定光网络单元的光网络单元识别符; (2)所述特定光网络单元根据所述Upstream_Overhead消息中的参数预设均衡延迟; (3)所述光传输线路终端对所述特定光网络单元进行测距,获得精确的均衡延迟,并将所述精确的均衡延迟发送给所述特定光网络单元; (4)所述特定光网络单元根据所述精确的均衡延迟调整上行帧时钟。 A gigabit passive optical network system equalization delay preset method, comprising the steps: (1) optical line terminal preset equalizer specific optical network unit ONU delay Upstream_Overhead unicast message, the message supported by Upstream_Overhead said specific optical network unit equalization delay preset; I the first byte of the message is improved Upstream_Overhead, the optical network unit Upstream_Overhead message identifier extended to support specific optical network unit optical network unit identifier; ( 2) the optical network unit according to the specific parameters in the message Upstream_Overhead equalization delay preset; (3) the optical transmission line terminal to said specific optical network unit for ranging, to obtain accurate equalization delay, and the accurate equalization delay of said transmission to said specific optical network unit; a (4) a specific optical network unit upstream frame accurate equalization delay of the clock adjustment.
2.根据权利要求I所述的吉比特无源光纤网络系统中均衡延迟预设方法,其特征在于,步骤(I)中,改进后的所述Upstream_Overhead消息第I字节支持广播ONU-ID和特定ONU的ONU-ID ;当所述第I字节的内容为“ 11111111”时,所述Upstream_Overhead消息为广播消息,用于所有ONU接收和处理;当所述第I字节的内容为“11111111”以外的值时,所述Upstream_Overhead消息为发给特定ONU的消息,当所述特定ONU的ONU-ID值与Upstream_Overhead消息第I字节内容一致时,所述特定ONU接收并处理所述Upstream_Overhead消肩、O The gigabit passive optical network system I according to the method of equalization delay preset claim, wherein step (I), the improved Upstream_Overhead message byte I of ONU-ID and broadcast support particular ONU ONU-ID; I when the content of the first byte is "11111111", the message is a broadcast message Upstream_Overhead, for receiving and processing all ONU; I when the content of the first byte of "11111111 when the value of "other than the ONU Upstream_Overhead message is a message sent to a specific, when the same content of I byte ONU-ID ONU and the value of the specific Upstream_Overhead message, the ONU receives and processes the specific extinction Upstream_Overhead shoulder, O
3.根据权利要求I所述的吉比特无源光纤网络系统中均衡延迟预设方法,其特征在于,步骤(2)中,将第10字节中的“e”比特设置为I,表示所述Upstream_Overhead消息中包含均衡延迟预设;然后将均衡延迟预设值写入第11字节和第12字节。 3. The method according to the preset delay gigabit passive optical network system of claim I equalizing, wherein the step (2), the first 10 bytes of the "e" bit is set to I, representing the Upstream_Overhead message includes said equalization delay preset; then equalization delay preset value and the first write 11 byte 12 byte.
CN 200710154695 2007-09-25 2007-09-25 Balance delay presetting method in Gbit passive optical fiber network CN101399616B (en)

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CN102075240B (en) * 2009-11-24 2015-06-03 中兴通讯股份有限公司 Method and system for performing ranging on optical network unit in passive optical network
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