18results about "Frequency-division multiplexing selection" patented technology

According to an aspect of an embodiment, a method may include assigning an activation window by an optical line terminal during a portion of an upstream transmitting window in a passive optical network (PON). The method may include performing a first modification to a first upstream transmission. The method may include performing a second modification to a second upstream transmission. The method may include receiving the first upstream transmission from a first optical network unit (ONU) during the activation window, the first ONU synchronized in the PON. The method may include receiving a second upstream transmission from a second ONU during the activation window, the second ONU requesting activation in the PON.

The invention discloses a time-frequency resource allocation method and system for a power distribution network, and is applied to the field of communication and power fusion, and the method comprises the steps: responding to a business processing request signal of a target power distribution network; determining the priority of each service request; determining a time-frequency resource block corresponding to each service request in sequence; when a service request corresponding to a high priority in the service request priorities is executed, if it is detected that the current time-frequency resource blocks are insufficient, a first scheduling signal is generated; when a service request corresponding to a low priority in the service request priorities is executed, if it is detected that the current time-frequency resource block is insufficient, a second split signal or a third adjustment signal is generated; generating a time-frequency resource allocation scheme of the target power distribution network; and executing the time-frequency resource allocation scheme. According to the power distribution network time-frequency resource allocation method and system provided by the invention, the time-frequency resource allocation problem of transmission of multiple types of service requirements under the condition that the time-frequency resources are limited is effectively solved, and the utilization efficiency of the time-frequency resources is improved.

A method, an apparatus, and a computer program product for scaling of subscriber capacity in a cloud native radio access network (RAN). A processing capacity being assigned to one or more containers in a plurality of containers of a cloud native radio access network for providing communication to at least one user equipment in a plurality of user equipments is determined. The determined processing capacity is compared to at least one predetermined threshold in a plurality of predetermined thresholds. Based on the comparing a determination is made whether to change an assignment of the processing capacity.

A method, an apparatus, and a computer program product for scaling of subscriber capacity in a cloud native radio access network (RAN). A processing capacity being assigned to one or more containers in a plurality of containers of a cloud native radio access network for providing communication to at least one user equipment in a plurality of user equipments is determined. The determined processing capacity is compared to at least one predetermined threshold in a plurality of predetermined thresholds. Based on the comparing a determination is made whether to change an assignment of the processing capacity.

Apparatus and methods for unified high-bandwidth, low-latency data services provided with enhanced user mobility. In one embodiment, a network architecture having sendee delivery over at least portions of extant infrastructure (e.g., a hybrid fiber coax infrastructure) is disclosed, which includes standards-compliant ultra-low latency and high data rate services (e.g., 5G NR services) via a common service provider. Premises devices are used to provide the 5G-based services to users at a given premises and thereabouts. In another variant, local area (e.g., "pole mounted") radio devices are used to provide supplemental RF coverage, including during mobility^ scenarios. The 5G-capable network enables uninterrupted and "seamless" exchange of data at a client device by utilizing a common waveform protocol (e.g., 3GPP-based) at a premises device and an external radio device to communicate with a client device at different locations and times while the device is moving between inside and outside the premises.

The present invention discloses a multi-channel reconfigurable space-based Internet of Things signal forwarding device, comprising: a radio frequency unit, connected to the baseband unit, for receiving and processing external signals and sending them to the baseband unit, and processing and transmitting transmitted signals; a data transmission unit, connected to the baseband unit, for generating wireless signals according to received data, transmitting the signals downward, and receiving and processing external signals; a baseband unit, including a first baseband unit and a second baseband unit. The first baseband unit is provided with a plurality of CHIRP radio frequency chips and a first control sub-unit, and the second baseband unit is provided with a plurality of LoRa radio frequency chips and a second control sub-unit. The baseband unit is used for demodulating received signals according to demodulation configurations, storing demodulated data, determining transmitted data, modulating the data according to modulation configurations to generate transmitted signals and sending the transmitted signals to the radio frequency unit, and reading data and sending it to the data transmission unit. The present invention can achieve parallel reception and processing of multiple-channel CHIRP Internet of Things signals and multiple-channel LoRa Internet of Things signals.

Apparatus and methods for unified high-bandwidth, low-latency data services. In one embodiment, a network architecture having service delivery over at least portions of extant infrastructure (e.g., a hybrid fiber coaxial infrastructure) is disclosed, which includes standards-compliant ultra-low latency and high data rate services (e.g., 5GNR services) via a common service provider. In one variant, parallel MIMO data streams supported by 3GPP 5G NR are shifted in frequency before being injected into the single coaxial cable feeder, so that frequency diversity (instead of spatial diversity) is leveraged to achieve the maximum total carrier bandwidth that 3GPP 5G NR chipsets. Intermediate Frequencies (IF) are transmitted over the media in one implementation, (i.e., instead of higher frequencies), and block-conversion to RF carrier frequency is employed subsequently in the enhanced consumer premises equipment (CPEe) for 3GPP band-compliant interoperability with the 3GPP 5G NR chipset in the CPEe.

The invention discloses a quantum key distribution parameter optimization method in a space-frequency multiplexing common-fiber transmission system. The method is suitable for a quantum key distribution light-emitting network of space-frequency multiplexing common-fiber transmission. The invention provides a quantum key distribution parameter optimization method based on a coordinate descent method, which mainly considers the problem that the quantum key distribution performance of fixed parameter setting is reduced due to channel parameter changes such as background noise and channel attenuation of a quantum channel in a space-frequency multiplexing common-fiber transmission system. The method aims at optimizing quantum key distribution parameters in real time according to channel parameters and improving quantum channel performance. Technical support is provided for fusion transmission of quantum key distribution and a classic optical network, and the application process of quantum key distribution is promoted.

Aspects of this disclosure relate to a front end architecture for selectively adding an external carrier aggregation band. A switch element can connect a radio frequency signal path to an antenna path through a frequency domain multiplexer, such as a diplexer, in a first mode. The switch element can connect the radio frequency path to the antenna path and bypass the frequency domain multiplexer in a second mode. The frequency domain multiplexer can be external to a front end module that include the radio frequency signal path. In the first mode, a front end system can support carrier aggregation with a band associated with circuitry implemented external to the front end module.

The present application provides an all-optical mode matching method, system, and electronic device for QPSK signals. By doubling the phase instead of the phase compression method in the related art, the target sequence can directly participate in the matching process. The complexity of the matching method is reduced, the symbol processing process is simplified, the efficiency of the matching method is improved, and pattern recognition can be completed quickly and effectively. In addition, the number of optical devices used in the matching system is greatly reduced, the system cost is reduced, and it is conducive to the on-chip integration of the matching system.

A method, apparatus, and computer program product for scaling subscriber capacity in a cloud-native radio access network (RAN). A processing capacity allocated to one or more containers in a plurality of containers of the cloud-native radio access network for providing communications to at least one user equipment of a plurality of user equipment is determined. The determined processing capacity is compared to at least one predetermined threshold of a plurality of predetermined thresholds. Based on the comparison, it is determined whether to change the allocation of the processing capacity.

This invention discloses an uplink and downlink wavelength locking method and system for Time Division Frequency Division Multiplexing Passive Optical Network (TFDM-PON), including a downlink wavelength difference estimation and compensation stage; an uplink carrier construction and transmission stage; and an optical line terminal (OLT) side reception and demodulation stage. In the downlink wavelength difference estimation and compensation stage, the frequency offset between the OLT transmitting source and the ONU local laser is estimated through the reception and processing of the downlink coherent optical signal by the optical network unit (ONU), and the local laser frequency is compensated. In the uplink carrier construction and transmission stage, an uplink coherent optical signal with controllable spectrum is generated based on the local laser source locked in the downlink wavelength difference estimation and compensation stage. In the OLT side reception and demodulation stage, the OLT receives the uplink coherent optical signals from each ONU, utilizing the predictability of the uplink optical carrier frequency. This invention provides an uplink and downlink wavelength locking method and system for TFDM-PON, effectively reducing the complexity of digital signal processing on the OLT side and improving the stability, reliability, and scalability of the system in scenarios with multiple ONUs concurrent access.

A method, an apparatus, and a computer program product for scaling of subscriber capacity in a cloud native radio access network (RAN). A processing capacity being assigned to one or more containers in a plurality of containers of a cloud native radio access network for providing communication to at least one user equipment in a plurality of user equipments is determined. The determined processing capacity is compared to at least one predetermined threshold in a plurality of predetermined thresholds. Based on the comparing a determination is made whether to change an assignment of the processing capacity.

The invention relates to the technical field of radio over fiber communication, and provides a hybrid transmission optical forward transmission system and a related method. The method comprises: separating an input bit stream into index bits and communication modulation bits; generating an unmodulated AFDM waveform with a corresponding chirp slope according to the index bit control, and processing the unmodulated AFDM waveform into a first baseband signal; modulating the communication modulation bit to an AFDM subcarrier to generate a second baseband signal, and carrying out up-conversion on the second baseband signal to obtain a first radio frequency signal; performing frequency division coupling on the first baseband signal and the first radio frequency signal to generate a mixed radio frequency driving signal; receiving the optical carrier frequency division mixed signal and converting the optical carrier frequency division mixed signal into a mixed radio frequency signal of an electric domain; separating the mixed radio frequency signal into a digital baseband signal and an analog radio frequency signal; performing discrete affine Fourier transform on the digital baseband signal, and determining chirp slope of the digital baseband signal through peak detection so as to demodulate index bits; and controlling the switching network to gate the analog radio frequency signal to the corresponding transmitting antenna according to the index bit.

A common local oscillator chip, cascading structure, and method; the common local oscillator chip includes a local oscillator module, driving module, multiplexing matching network, local oscillator selection module, output matching network, and multiplexing transmission port. The local oscillator module provides an internal local oscillator signal; the driving module is connected to the local oscillator module, transmits the internal local oscillator signal when activated; the multiplexing matching network is connected to the driving module, outputs the internal local oscillator signal through the multiplexing transmission port, or receives an external local oscillator signal through the multiplexing transmission ports; the local oscillator selection module is connected to the local oscillator module and the multiplexing matching network, the local oscillator selection module is configured to select one of the internal local oscillator signal and external local oscillator signal, the chip local oscillator signal is generated through the output matching.

To provide a method, a device, and a computer program product for scaling subscriber capacity in a cloud-native radio access network (RAN).SOLUTION: In a cloud-native radio access network, to provide communication to at least one user device of a plurality of user devices, processing capacity allocated to one or more containers in a plurality of containers is determined, the determined processing capacity is compared with at least one predetermined threshold of a plurality of predetermined thresholds, and it is determined whether to change the allocation of the processing capacity based on the comparison.SELECTED DRAWING: Figure 12

An electro-optic receiver includes a bus optical waveguide and a plurality of wavelength division multiplexing (WDM) receiver slices positioned along the bus optical waveguide. Each of the plurality of WDM receiver slices includes a WDM element optically coupled to the bus optical waveguide, a photodetector, and a receiver circuit. The photodetector is optically connected to the WDM element by both a first optical connection and a second optical connection. The WDM element conveys a first component of input light through the first optical connection to the photodetector, and a second component of input light through the second optical connection to the photodetector, where first and second components of input light travel in opposite directions through the bus optical waveguide. The receiver circuit generates an electrical data signal from photocurrents received from the photodetector.