Huawei Technologies Co., Limited

Future Wei Technologies, Inc.

Meng Sui

Jun Zhao

Frank J Effenberger

Feng Wang

Lei Zhou

Yuanqiu Luo

Wei Bin Lin

Liming Fang

Xiaofeng Zhang

Ning Cheng

Sulin Yang

Hai Gao

Cao Shi

Zhong Pan

Zhenping Wang

Guikai Peng

Sanzhong Li

Michael R Shaffer

Shicai Chen

An apparatus for despreading in an optical domain configured to split a received optical signal into a first optical signal and a second optical signal, perform phase deflection on the second optical signal, output a third optical signal, perform phase deflection on the first optical signal and the third optical signal, output a fourth optical signal and a fifth optical signal to a balanced receiver, and superimpose the fourth optical signal and the fifth optical signal to generate a first electrical signal. A multiplication operation in conventional code division multiple access (CDMA) despreading is transferred from an electrical domain to an optical domain such that a chip rate can be easily raised to 20 gigahertz (GHz) or even to 25 GHz, a maximum rate of 100 gigabits per second (Gbps) can be provided in a single wavelength, and a user requirement for high bandwidth can be met.

Method and apparatus for despreading in optical domain

Embodiments of the present invention provide a method, an apparatus, and a system for processing an optical network signal. The method includes: receiving an optical signal sent by an optical line terminal, where the optical signal includes two polarization components perpendicular to each other, and downlink data is modulated on one of the polarization components; dividing the optical signal into two signals, where each signal is the optical signal; demodulating the downlink data from one optical signal and performing, for the other optical signal, vertical polarization rotation processing and processing of modulating uplink data onto two polarization components of the optical signal; sending the other optical signal on which the vertical polarization rotation processing and the uplink data modulation processing are performed to the optical line terminal. With the embodiments of the present invention, signal processing load of the optical network unit and the optical line terminal can be lowered.

Method, apparatus, and system for processing optical network signal

An optical line terminal (OLT) configured to receive transmission requests from a plurality of both network elements (NE) and customer premises equipment (CPE), allocate a timeslot to each NE for transmission on an optical distribution network (ODN), and a timeslot to each CPE for transmission on an electrical distribution network (EDN), wherein each NE intermediates between the OLT and the CPEs. Included is a NE configured to transmit a timeslot to a CPE for transmission on an EDN allocated by an OLT, receive data frames from the CPE during the timeslot, and forward the data frames to the OLT without rescheduling. Also included is a method comprising sending a transmission request to an OLT, receiving a timeslot from the OLT for transmission on an EDN in response, transmitting data frames to a NE during the timeslot, wherein the NE forwards the data frames to the OLT without rescheduling.

Dynamic bandwidth assignment in hybrid access network with passive optical network and another medium

An apparatus comprising a first passive optical network (PON) component configured to couple to a second PON component via an optical link and authenticate the second PON component based on authentication information to authorize a backup wireless link between the first PON component and the second PON component. The backup wireless link corresponds to a wireless backup system for the PON. The authentication information is associated with an identifier of the wireless backup system. Also included is a network component comprising a first passive optical network (PON) component configured to receive authentication information for a wireless backup system for a PON from a second PON component and compare the authentication information to expected authentication information at the first PON component to authorize a wireless link between the first PON component and the second PON component for the wireless backup system.

Method for authentication of a wireless backup system for an optical network unit

A method for time synchronization on a passive optical network is disclosed, including: an optical line terminal (OLT) receives clock information sent by a first optical network unit (ONU); the OLT adjusts local time of the OLT according to the clock information, to implement clock synchronization between the OLT and the first ONU; the OLT sends the clock information to a second ONU, to implement clock synchronization between the second ONU and the OLT. The OLT in an embodiment of the present invention does not need to obtain clock signals from an upper network and the clock information does not need to be transmitted in a multi-level mode over a packet network; therefore, the precision of ToD can be greatly increased.

Method, apparatus, and system for time synchronization on passive optical network

A time synchronization method and a time synchronization device in a passive optical network (PON), and a PON are provided. The method includes receiving a synchronization packet sent after time synchronization of an optical line terminal (OLT) with a master clock (MC) is achieved, wherein the synchronization packet carries a timestamp TMtdetermined after the time synchronization of the OLT is achieved, adjusting a local clock according to the timestamp to achieve time synchronization of an optical network unit/optical network terminal (ONU/ONT) with the OLT, and after the time synchronization of the OLT is achieved, instructing an slave clock (SC) to perform time synchronization. A time synchronization device and a time synchronization system for implementing the method in a PON are further provided.

Time synchronization method and device in passive optical network and passive optical network

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Shenzhen, China

Meng Sui