9results about "Frequency-division multiplexing selection" patented technology

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.

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.

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.

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.

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.