Method, device and system for framing a passive optical network

A passive optical network and framing technology, applied in the field of communication, can solve the problems of increased optical link loss and insufficient optical power budget.

Active Publication Date: 2019-04-19
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing ODN network may have the situation that the optical link loss increases and the optical power budget is insufficient

Method used

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  • Method, device and system for framing a passive optical network
  • Method, device and system for framing a passive optical network
  • Method, device and system for framing a passive optical network

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0102] image 3 A schematic flowchart of a framing method provided by an embodiment of the present invention is shown, and the method is applied to such as Figure 2A or Figure 2B In the network structure shown, refer to image 3 As shown, the method includes:

[0103] Step 301, respectively generate a first TC frame and a second TC frame, wherein the downlink rate of the first TC frame complies with the standard G.984.3 or G.987.3, that is, 2.488Gbps or 10Gbps, and the downlink rate of the second TC frame The downlink rate is 1 / N of the downlink rate of the first TC frame, the sum of the frame lengths of the first TC frame and the second TC frame is 125 microseconds, and N is an integer greater than 1.

[0104] Step 302: Perform bit mapping on the second TC frame to generate a third TC frame, the bit mapping means that each bit of the second TC frame is identified by N bits.

[0105] Step 303, sending the first TC frame and the third TC frame to an ONU.

[0106] Prefera...

Embodiment 2

[0161] A method for framing a passive optical network provided by an embodiment of the present invention will be described in detail below with reference to FIG. 7 . As shown in FIG. 7, FIG. 7 shows a method 700 for framing provided by an embodiment of the present invention, and the method 700 includes:

[0162] S701. Generate a first TC frame and a second TC frame respectively, wherein the downlink rate of the first TC frame is 2.488Gbps or 10Gbps, and the downlink rate of the second TC frame is 1 / N of the downlink rate of the first TC frame , the sum of the frame lengths of the first TC frame and the second TC frame is 125 microseconds, and N is an integer greater than 1.

[0163] S702. Perform first encoding on the second TC frame. Among them, the first coding can use RS (255, 239), and can also use other coding methods, such as RS (255, 151) coding, RS (248, 216) coding, LDPC coding, concatenated FEC coding, or other existing The FEC coding existing in the technology wil...

Embodiment 3

[0176] Figure 8 It shows a schematic flowchart of a method 800 for deframing a passive optical network provided by an embodiment of the present invention. The method 800 can be applied in GPON or XG-PON. When applied in a GPON system, the receiving rate is 2.488 Gbps ONU executes; when applied in XG-PON system, it is executed by ONU with receiving rate of 10Gbps. Such as Figure 8 As shown, the method 800 includes:

[0177] S801. Receive a downlink data stream, where the downlink data stream includes a first TC frame and a second TC frame, where the downlink rate of the first TC frame complies with the standard G.984.3 or G.987, that is, 2.488Gbps Or 10Gbps, the downlink rate of the second TC frame is 1 / N of the downlink rate of the first TC frame, the sum of the frame lengths of the first TC frame and the second TC frame is 125 microseconds, and N is an integer greater than 1.

[0178] S802. Synchronize with the first TC frame.

[0179] S803. Parse the first TC frame.

...

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Abstract

The invention discloses a passive optical network framing method, device and system. The method includes generating a first Gigabit passive optical network transmission convergence GTC frame and a second GTC frame respectively, wherein the sum of the frame lengths of the first GTC frame and the second GTC frame is 125 microseconds, and the second The frame header interval of the GTC frame is 125 microseconds; the second GTC frame is bit-mapped to generate a third TC frame, and the bit mapping refers to using N bits for each bit of the second TC frame to identify; sending the first GTC frame and the second GTC frame to an optical network unit. Since the line rate corresponding to the second GTC frame in this framing method is lower than 2.488Gbps, the rate of the receiver on the receiving side is reduced and the bandwidth of the receiver is narrowed, thereby reducing the loss of the optical link, thereby improving the optical power budget .

Description

technical field [0001] The present invention relates to the communication field, in particular to a passive optical network framing method, device and a passive optical network deframing method, device and system. Background technique [0002] With the rapid development of optical communication technology, a passive optical network (Passive Optical Network, PON for short) system is more and more widely used in the optical communication technology. The PON consists of an optical line terminal (Optical Line Terminal, referred to as OLT) 110 on the office side, an optical network unit (Optical Network Unit, referred to as ONU) or an optical network terminal (Optical Network Terminal, referred to as ONT) 120 on the user side, and an optical distribution network. A network (Optical Distribution Network, ODN for short) 130 is formed. The passive optical network generally adopts a tree topology, and a typical PON architecture is as follows: figure 1 As shown, the following uses t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/00
CPCH04J14/00H04B10/272H04J14/0254H04J2203/0089H04Q11/0003H04Q11/0005H04Q11/0067H04Q2011/0049H04Q2011/0088H04Q2213/13168
Inventor 叶飞赵殿博彭桂开林华枫程宁张晓风唐大江王振平
Owner HUAWEI TECH CO LTD
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