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Passive optical network system and data transmission method and device

A passive optical network and data technology, applied in the field of communication, can solve problems such as tension, increased difficulty, and no solution proposed, and achieve the effect of coexistence of PON systems and saving wavelength resources

Active Publication Date: 2019-05-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there are demands for both 25GPON and 50GPON, if defined as two systems, it is difficult to meet due to the shortage of wavelength resources. If the same wavelength is used, the uplink and downlink rates are completely different, which greatly increases the difficulty
[0003] For the above-mentioned technical problems in related technologies, no effective solution has been proposed yet

Method used

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  • Passive optical network system and data transmission method and device
  • Passive optical network system and data transmission method and device
  • Passive optical network system and data transmission method and device

Examples

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Embodiment 1

[0084] In the standardization of NGEPON, 25G PON and 50G PON are regarded as the same generation standard. The downlink wavelength is 1330nm, and the uplink wavelength is 1280nm. 25G PON and 50G PON use the same optical module, the same baud rate, and different modulation formats. It is noted that the modulation format may include at least one of the following: a Non-Return to Zero (NRZ for short) modulation format, a 4-level Pulse Amplitude Modulation (PAM4 for short) modulation format, and a Db modulation format. There are many combinations of different modulation formats for 25G PON and 50G PON. For example, when the NRZ modulation format is used, the system works at 25Gbps, that is, symmetrical 25GPON; when the PAM4 modulation format is used, the system works at 50Gbps, that is, symmetrical 50GPON; but not limited to this.

[0085] Except for the different modulation formats, 25GPON and 50GPON have the same uplink and downlink wavelengths, optical modules and baud rates. ...

Embodiment 2

[0088] The 25GPON and 50GPON based on the preferred embodiment 1 can coexist in the same system.

[0089] 1. The downlink of 25G PON and 50G PON works on 1330nm wavelength, adopts TDM working mode, OLT sends 25Gbps rate data and 50Gbps rate data in different time slots respectively;

[0090] (1) The OLT has the ability to allocate downlink bandwidth, and the ONU receives data in the corresponding time slot according to the instructions of the OLT; it should be noted that the ability to allocate downlink bandwidth can refer to the ability of the OLT to: indicate which ONUs in the system are on which time slots Receiving downlink data, but not limited thereto.

[0091] (2) The OLT indicates information such as rate and payload length in the corresponding time slot, and the ONU analyzes the corresponding rate and payload according to the indication.

[0092] 2. The uplink of 25G PON and 50G PON works on 1280nm wavelength, adopts the TDM working mode, the OLT allocates the uplink...

Embodiment 3

[0099] In the standardization of NGEPON, 25G PON and 50G PON are regarded as the same generation standard. The downlink wavelength is 1330nm, and the uplink wavelength is 1280nm. 25G PON and 50G PON use the same optical module and different baud rates. When the rate is high, the system works at 25Gbps, that is, symmetrical 25GPON. When using 50Gbps baud rate, the system works at 50Gbps, that is, symmetrical 50GPON.

[0100] 25GPON and 50GPON have different baud rates, the optical module supports 25GPON and 50GPON adopt the same modulation format, and the uplink and downlink wavelengths are the same.

[0101] It should be noted that both 25GPON and 50GbpsPON can adopt NRZ modulation format, PAM4 modulation format or Db modulation format, but it is not limited to this, as long as the modulation formats adopted by 25GPON and 50GbpsPON are the same.

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Abstract

The invention provides a passive optical network system and a data transmission method and device. The data transmission method comprises the following steps: transmitting downlink data at different rates sent by OLT or downlink data sent by a plurality of OLT on a downlink of a passive optical network system in a time division multiplexing TDM mode on a first specified wavelength; And transmitting the uplink data at different rates sent by the ONU to the OLT or the uplink data sent by the ONU to the plurality of OLT on an uplink of the passive optical network system in a TDM manner on a second specified wavelength. According to the invention, the problem of how to realize the coexistence of the PON system on the basis of saving wavelength resources is solved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a passive optical network system, a data transmission method and a device. Background technique [0002] During the IEEE NGEPON standardization process, some operators tend to adopt 25Gbps single-wavelength rate from the perspective of EPON / GPON evolution requirements, that is, the evolution route is from EPON / GPON to 25Gbps PON, while some operators from the perspective of 10GEPON / XG-PON evolution requirements The single-wavelength rate tends to be 50Gbps, that is, the evolution route is from 10GEPON / 10GGPON to 50Gbps PON. When both 25GPON and 50GPON are in demand, if they are defined as two systems, it is difficult to meet due to the shortage of wavelength resources. If the same wavelength is used, the uplink and downlink rates are completely different, which greatly increases the difficulty. [0003] Aiming at the above-mentioned technical problems in the related art, no eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02H04Q11/00
CPCH04Q11/0067H04J14/0249H04B10/272H04J14/086H04Q2213/1301
Inventor 张伟良袁立权郭勇耿丹张俊文魏君珊涂芝娟黄新刚
Owner ZTE CORP
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