Huawei Technologies Co., Limited

Future Wei Technologies, Inc.

Dao Pan

Fanglin Sun

Xiaofeng Zhang

Tao Ouyang

Xiaoshu Si

Li Zhang

Jim Chen

Syed Rahman

Peng Xiao

Yong Li

Hua Li

Fan Zhang

Guangsheng Wu

Chenghu Shen

Wei Zhong

Yong You

Fang Xia

Lingxiao Kong

A PLC control method includes: transmit a first signal through a neutral wire and a path between the neutral wire and a differential signal processing circuit; transmit a second signal through a live wire and a path between the live wire and the differential signal processing circuit; and disconnecting the path between the differential signal processing circuit and the neutral wire or the live wire, conducting the differential signal processing circuit to a ground wire, and when a transmission rate of the ground wire is greater than or equal to a preset transmission rate threshold, transmitting the first signal or the second signal through the ground wire and a path between the ground wire and the differential signal processing circuit.

PLC control method and apparatus

This application provides a power line communication method. Wherein, a first node determines a channel status of a channel between a second node and the first node in an alternating current cycle. Then, the first node may divide the alternating current cycle into time windows based on the channel status, and determine modulation coding parameters used for data transmission between the second node and the first node in the time window obtained through division. Further, the first node may send information about the time window obtained through division and the modulation coding parameters used in the time window obtained through division to the second node.

Power line communication method and apparatus

Embodiments of the present disclosure provide an FEC coding and decoding method and device, and a system. A transmit end determines a forward error correction FEC coding type according to a length of to-be-coded data in burst data, and performs coding according to the determined FEC coding type. A receive end determines a forward error correction FEC decoding type according to a length of to-be-decoded data in burst data, and performs decoding according to the determined FEC decoding type. The FEC coding and decoding method provided in the embodiments of the present disclosure improves utilization of a communication resource is improved, and saves a communication resource.

Coding and decoding method and device, and system

A central access network unit comprising a processor configured to assign a plurality of upstream training blocks from an upstream OFDM symbol to a plurality of downstream network units, wherein the OFDM symbol comprises a plurality of pilot subcarriers equally spaced across an upstream RF spectrum in a pre-determined time interval, and wherein each upstream training block comprises a different subset of the pilot subcarriers that are non-consecutive and situated across the upstream RF spectrum, and generate one or more messages comprising assignments of the upstream training blocks, and a transmitter coupled to the processor and configured to transmit the messages to the plurality of downstream network units via a network, wherein the messages instruct at least one of the plurality of downstream network units to transmit a modulated pre-determined sequence at the pilot subcarriers corresponding to the upstream training block assigned to the downstream network unit.

Upstream pilot structures in point-to-multipoint orthogonal frequency-division multiplexing (OFDM) communication systems

An uplink signal scheduling method, a processing device, and a system. The method includes when uplink signals sent by at least one transmit device are received, preprocessing the uplink signals, to generate a data over cable service interface specification (DOCSIS) frame, where the DOCSIS frame includes at least two uplink signals, and each uplink signal of the at least two uplink signals corresponds to one uplink wavelength, and when it is detected that a signal conflict exists in the DOCSIS frame, creating at least two signal groups according to the uplink signals, and allocating, to the at least two signal groups, uplink signals that have a same uplink wavelength and cause the signal conflict, and performing scheduling on the uplink signals according to the signal groups that have undergone allocation.

Uplink signal transmission method, processing device, and system

Embodiments of the present invention relate to the field of communications technologies, and disclose a resource reservation method and system, and a convergence device. The method includes: receiving, by a convergence device, a first resource reservation request message based on a format of a first interface and that is from a policy server (PS); converting, by the convergence device, the first resource reservation request message into a second resource reservation request message based on a format of a second interface; and sending, by the convergence device, the second resource reservation request message based on the format of the second interface to a modulation and demodulation system, so that the modulation and demodulation system performs resource reservation according to the second resource reservation request message.

Resource reservation method and system, and convergence device

Upstream pilot structure in point to multipoint orthogonal frequency division multiplexing communication system

An apparatus comprising a receiver configured to couple to an Ethernet Passive Optical network over Coaxial (EPoC) network, and receive an upstream Orthogonal Frequency Division Multiplexing (OFDM) signal comprising a plurality of OFDM Resource Elements (REs), and a processor coupled to the receiver and configured to determine a presence of a burst marker sequence in the received signal, wherein the burst marker sequence comprises interlaced pilot symbols and null symbols, and wherein determining the presence of the burst marker sequence comprises computing a power ratio between a first set of the OFDM REs and a second set of the OFDM REs, and determining that the burst marker sequence is found when the computed power ratio exceeds a pre-determined threshold.

Burst marker scheme in a communication system

A Cable Modem Termination System (CMTS) comprising a receiver configured to receive a plurality of upstream transmission request messages from a plurality of coaxial units via an electro-optical network, wherein the upstream transmission request messages each request permission to transmit a specified amount of data, a processor coupled to the receiver and configured to allocate Orthogonal Frequency-Division Multiplexing (OFDM) minislots to each coaxial unit based on the amount of data requested in the associated upstream transmission request message, and a transmitter coupled to the processor and configured to transmit at least one Uplink Allocation Map (UL-MAP) message to indicate minislot allocations to the coaxial units.

Allocating orthogonal frequency-division multiple access (OFDMA) resources in data over cable services interface specification (DOCSIS) networks

A method implemented in a Fiber Coaxial Unit (FCU) comprising receiving a plurality of Ethernet Passive Optical Network (EPON) report messages from a plurality of Coaxial Network Units (CNUs) across a coaxial network, receiving an EPON gate message comprising Time Quanta (TQ) information indicating an upstream transmission time grant for the FCU across the optical network, translating the TQ based upstream transmission time grants to OFDM resource block grants in a time domain and in a frequency domain across the coaxial network for each CNU based on the configurable constants, and transmitting an EPON over Coaxial (EPoC) gate message to each CNU, wherein each EPoC gate message comprises a CNU profile indicating the Orthogonal Frequency-Division Multiplexing (OFDM) resource block grants for the an associated CNU and a start time.

Allocating orthogonal frequency-division multiple access (OFDMA) resources in ethernet passive optical network(PON) over coaxial (EPOC)

An apparatus for communication. A headend supports a plurality of customer premises equipment (CPEs) in a cable service network. An NCP carrier selector selects at least one orthogonal frequency division multiplex (OFDM) subcarrier taken from a radio frequency (RF) spectrum available for broadcasting signals over the cable service network using a plurality of profiles, wherein each selected OFDM subcarrier comprises a corresponding bit loading for each supported profile that meets or exceeds a minimum number of bits used for delivering next codeword pointer (NCP) messages that is acceptable for each of a plurality of profiles used in the plurality of CPEs for receiving signals over the cable service network. A profile generator generates an NCP profile identifying one or more selected OFDM subcarriers, wherein the NCP profile indicates which OFDM subcarriers within the RF spectrum are usable to carry NCP messages, and an associated bit loading for each selected subcarrier.

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Johannesburg, South Africa

Dao Pan