38 results about "Spatial division multiplexing" patented technology

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, an indication that the UE is capable of transmitting or receiving transport block (TB) repetitions using spatial division multiplexing (SDM). The UE may receive, from the base station and based at least in part on the indication, at least one downlink control information (DCI) message that schedules a TB in a first resource and a repetition of the TB in a second resource, the first resource and the second resource at least partially overlapping in a time domain and a frequency domain. The UE may communicate the TB and the repetition of the TB using different antenna panels according to the at least one DCI message. Numerous other aspects are provided.

The invention relates to an underwater point cloud data transmission system and method based on vortex light mode division multiplexing, and the system comprises a point cloud data transmission module which is used for modulating the three-dimensional point cloud data of a measured target into two paths of laser signals, carrying out the first preprocessing of the two paths of laser signals, and transmitting an underwater space light signal; and the point cloud data receiving module is used for receiving the underwater space optical signal, performing second preprocessing on the underwater space optical signal, and generating user service data. According to the invention, a double-path vortex optical space division multiplexing technology is adopted, synchronization of target detection and data return is realized, and key technical problems of poor real-time performance, weak anti-interference capability and the like in the aspect of underwater three-dimensional point cloud data acquisition are effectively solved.

This invention relates to a method for fabricating a low insertion loss spatial multiplexer / demultiplexer for multi-core optical fibers, belonging to the field of multi-core optical fiber communication technology. By using single-core fibers of different core diameters at the splice points, this invention effectively improves the fault tolerance of the multiplexer's core arrangement while reducing optical signal leakage at the splice points, thereby reducing insertion loss. This allows for the multiplexing of signals from single-core fibers into multi-core fibers at the input end and the demultiplexing of signals from multi-core fibers into single-core fibers at the output end. The spatial multiplexing / demultiplexer device prepared using this method exhibits lower insertion loss compared to the traditional bundled method, and is simpler and less expensive to operate than polymer waveguide and fused taper methods. The prepared spatial multiplexer / demultiplexer is small, flexible, durable, and suitable for mass production.

The invention discloses a wavefront shaping system and method based on space division multiplexing. A light beam emitted by a laser light source is expanded, modulated by a spatial light modulator, and collected by a photoelectric detector after passing through a rotary mask and a series of optical systems; a laser light source enters the spatial light modulator, the rotary mask is rotated in a refresh cycle of the spatial light modulator, light beam wavefront is modulated through a modulation area corresponding to a sub-area which is transferred into a light path, and finally the light beam wavefront is collected by a photoelectric detector. Then the control unit processes the obtained four groups of signals by using a wavefront shaping algorithm to obtain four groups of preliminarily corrected wavefront parameters; and taking down the rotary mask, and carrying out wavefront matching on the four groups of corrected wavefronts to obtain a final corrected wavefront signal. According to the invention, accurate focusing after light penetrates through the scattering medium can be realized, and higher light intensity gain can be realized under the same correction time.

The application discloses a resource allocation method of a hybrid space division multiplexing elastic optical network and belongs to the technical field of optical communication. The application constructs a hybrid network model containing a multi-fiber bundle link and a multi-core optical fiber link, and designs a load and crosstalk aware heuristic algorithm. By means of modulation format step degradation, spectrum window plane construction to implicitly satisfy spectrum continuity constraints, load aware routing to balance network load, crosstalk aware core selection to suppress inter-core crosstalk, and optical signal-to-noise ratio verification to ensure transmission quality, joint optimization of routing, spectrum and spatial channels is realized. The application solves the problem that the prior art is only directed to a single type of space division multiplexing network and is difficult to adapt to a hybrid scene, effectively reduces network blocking rate under the premise of ensuring transmission quality, takes into account crosstalk suppression and spectrum efficiency, and has good engineering practicability.

To provide a spatial multiplexing optical transmission system using a multicore fiber, which does not use a tone signal and does not require any compensation circuit for phase fluctuations in a receiving circuit.SOLUTION: One of multiple cores is used as an optical length control channel for compensating for optical length fluctuations that occur in a multicore fiber. Coherent optical communication or quantum communication / quantum key delivery is performed using another core in the multicore fiber whose optical length has been controlled by the optical length control channel.SELECTED DRAWING: Figure 1

Various aspects of the disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can transmit, to a base station, an indication that the UE is capable of transmitting or receiving a transport block (TB) repetition using spatial division multiplexing (SDM). The UE can receive, from the base station based at least in part on the indication, at least one downlink control information (DCI) message that schedules a TB in a first resource and a repetition of the TB in a second resource, the first resource and the second resource at least partially overlapping in a time domain and a frequency domain. The UE can communicate the TB and the repetition of the TB using different antenna panels in accordance with the at least one DCI message. Numerous other aspects are provided.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a plurality of sidelink transmissions associated with a spatial division multiplexing (SDM) configuration. The UE may fail to decode at least one sidelink transmission of the plurality of sidelink transmissions. The UE may transmit feedback indicating the failure to decode the at least one sidelink transmission, wherein the feedback includes an indication of at least one layer of the SDM configuration associated with the at least one sidelink transmission. Numerous other aspects are described.

The invention relates to an uplink demodulation reference signal (DMRS) port indication method and device and a storage medium, relates to the technical field of communication, and is used for determining different DMRS ports corresponding to different Panel transmission under single DCI (Downlink Control Information). The method comprises the following steps: sending first indication information in response to simultaneous transmission of STxMP by a plurality of antenna panels of a physical uplink shared channel (PUSCH) through a space division multiplexing (SDM) multiplexing mode by a terminal based on a single downlink control information (DCI) scheduling mode; wherein an antenna port DMRS indication domain in the DCI is used for indicating the total number of all distributed DMRS ports for the terminal; the first indication information is used for indicating DMRS ports which are respectively and correspondingly distributed when one transmission block of the PUSCH is transmitted on the same time-frequency resource by facing different transmission receiving points TRP through different Panels, different TRP / Panel / transmission configuration indicators TCI / transmission opportunities TO are respectively associated with different beams / TCI, and the DMRS ports and the Panels have a corresponding relationship.

The invention discloses a double-agent-based resource allocation method in a space division multiplexing quantum optical network. The method is suitable for realizing cooperative transmission of classical optical signals and quantum key distribution signals in a multi-core optical network. The method mainly solves the problem that high-performance intelligent cooperative transmission is difficult to realize due to noise influence and resource competition in the common-fiber transmission process of classical signals and quantum signals in a multi-core optical network. A state representation method combining service requirements and environment information is constructed, a unified reward function considering classic signal transmission performance and quantum signal transmission performance at the same time is introduced, and a multi-agent near-end strategy optimization algorithm is adopted for joint training, so that a resource allocation algorithm based on double agents is realized; dynamic collaborative resource allocation of classical signals and quantum signals is realized, so that the network performance can be optimized, the network blocking rate is reduced, the transmission performance of the two signals is improved, and theoretical research and practical application of a space division multiplexing quantum optical network are promoted.

The disclosed systems and methods are for monitoring optical performance in a spatial division multiplexing (SDM) system, comprising: i) extracting, by an optical coupler, at least a portion of a plurality optical signals propagating in different communication lanes of the SDM-based optical communication system, wherein each optical signal of the plurality of optical signals is modulated with a distinguishable pilot tone (PT) signal; ii) combining, by the optical coupler, the extracted portion of the plurality of optical signals, and generate a combined optical signal; iii) extracting, by a pilot tone detector (PTD), PT signals from the combined optical signal; iv) determining, by the PTD, optical signal specific information included in the PT signals; and v) computing, by the PTD, optical power of each optical signal based on the optical signal specific information.

The embodiment of the invention discloses an uplink communication method and device based on multi-panel simultaneous transmission, first indication information sent by network equipment is received, the first indication information is used for indicating a demodulation reference signal (DMRS) port used for PUSCH transmission, the PUSCH transmission is space division multiplexing multi-antenna panel simultaneous transmission based on single DCI, and the first indication information is used for indicating a demodulation reference signal (DMRS) port used for PUSCH transmission. Second indication information sent by the network equipment is received, the second indication information is used for indicating transmission layer number information corresponding to a plurality of PUSCH transmission occasions of the PUSCH, the plurality of PUSCH transmission occasions are transmitted in directions corresponding to a plurality of TCI states and / or TRP, DMRS ports corresponding to the PUSCH transmission occasions are determined, the DMRS ports used for transmission can be flexibly configured, and the transmission efficiency is improved. Transmission interference among multiple antenna panels is effectively reduced, transmission reliability and robustness are effectively improved, and system communication efficiency is improved.

An apparatus comprising: means for obtaining, from a network device, precoding information related to at least one of: one or more physical uplink control channel transmissions from one or more antenna arrangements of the apparatus or one or more single frequency network or spatial division multiplexing based physical uplink shared channel transmissions from one or more antenna arrangements of the apparatus; means for determining, based on the precoding information, that one or more precoders associated with the one or more single frequency network or spatial division multiplexing based physical uplink shared channel transmissions are to be applied to one or more physical uplink control channel transmissions at the apparatus; and means for transmitting the one or more physical uplink control channel transmissions to the network device using the one or more precoders.

Various aspects of this disclosure relate generally to wireless communications. In some aspects, a user equipment (UE) can determine a value for a PTRS power boost of a phase tracking reference signal (PTRS) port, wherein the PTRS port is associated with a sounding reference signal (SRS) resource set, and wherein the value of the PTRS power boost is relative to each layer of the physical uplink shared channel (PUSCH) per resource element (RE). The UE can transmit the PTRS associated with the PTRS port, and wherein the transmission power of the PTRS is based at least in part on the value of the PTRS power boost. Numerous other aspects are described.

A communication method and a communication apparatus are disclosed, related to the communication field. The method includes: A terminal sends data to a network device based on first information sent by the network device. The first information indicates a transmission mode and a plurality of precoding matrices corresponding to a plurality of antenna panels. The transmission mode is a first transmission mode or a second transmission mode. An antenna port set used by each antenna panel of the terminal in the first transmission mode or the second transmission mode is a part of an antenna port set used by the terminal in a third transmission mode. The first transmission mode is an SDM mode, the second transmission mode is an SFN mode, and the third transmission mode is an sTRP mode.

In one aspect, a base station includes a transceiver configured to communicate with a user equipment (UE). The base station also includes a processor communicatively coupled to the transceiver and configured to perform operations including: transmitting, by the network, a downlink control information (DCI) signal to the UE, the DCI including an indication associated with UE operation with simultaneous transmission (STxMP) across multiple panels using a single frequency network (SFN) or using space division multiplexing (SDM); and communicating with the UE based on a maximum number of layers associated with the indication.

An embodiment of the present application provides a PDCCH resource allocation method, apparatus and network equipment, the method including allocating PDCCH resources to a target user equipment UE according to at least one of a control format indication CFI adaptive adjustment strategy associated with a control channel element CCE occupancy rate, a preset CCE aggregation level adjustment strategy and a physical downlink control channel PDCCH spatial division multiplexing strategy. The present application can achieve refined PDCCH resource allocation through CFI adaptation associated with CCE occupancy rate, improve the single-slot scheduling capability and rate gain of the network equipment through CCE aggregation level adjustment, and improve the PDCCH resource utilization efficiency through PDCCH spatial division multiplexing, so that PDCCH resources are no longer limited to the time-frequency domain location, and can enrich the resource allocation method, and improve the overall performance of the network equipment through the mutual correlation between the three strategies.

This disclosure relates to a terminal capability reporting method and system, storage medium, and electronic device, belonging to the field of communication technology. The method includes: the terminal reporting to a base station that the maximum supported spatial multiplexing layer number for downlink reception is 5 or 6 layers. This method enables the base station to configure signal configurations corresponding to the terminal's transmission capability based on the reported support information of 5 or 6 layers for downlink reception, and to schedule transmission on the physical downlink shared channel. This solves the problem in existing solutions where downlink data transmission in Rank 6 scenarios is impossible because the application scenarios, applicable network configurations, and receiver implementation methods for Rank 6 are not limited, thus achieving the goal of downlink data transmission in Rank 6 scenarios.

A method for physical uplink shared channel (PUSCH) configuration includes: configuring different transmission configuration indications (TCIs) for different antenna panels of a terminal, for a non-coherent joint transmission (NC-JT) of a PUSCH. The TCIs are associated with beam information. The different TCIs are associated with a same transmission resource simultaneously. The transmission resource includes a time domain resource and a frequency domain resource. A plurality of different antenna panels perform the NC-JT of the PUSCH using spatial division multiplexing (SDM).

This invention relates to a deployment method and optical fiber communication system for reconfigurable optical fiber mode demultiplexing. The method includes the following steps: S101, signal generation; S102, multiplexing crosstalk compensation; S103, mode multiplexing; S104, optical fiber transmission; S105, mode demultiplexing; S106, demultiplexing crosstalk compensation; S107, signal reception and processing. This invention employs static compensation at both the transmitting and receiving ends, achieving lower inter-module crosstalk even for any non-ideal mode switching device, maintaining lower MIMO computational complexity, and reducing the design and manufacturing difficulty of the mode switching device. Simultaneously, this method allows for real-time and rapid evaluation of the crosstalk compensation matrix, making the spatial division multiplexing communication system more tolerant to optical path coupling errors.

The application discloses a wavefront shaping system and method based on spatial division multiplexing. After the light beam emitted by a laser light source is expanded, modulated by a spatial light modulator, and passed through a rotating mask and a series of optical systems, the light beam is collected by a photoelectric detector. The laser light source enters the spatial light modulator. In a refresh cycle of the spatial light modulator, the rotating mask is rotated. For the sub-regions turned into the light path, the wavefront of the light beam is modulated by the modulation regions corresponding to the sub-regions. Finally, the wavefront is collected by the photoelectric detector. Then, a control unit processes four groups of signals obtained by using a wavefront shaping algorithm to obtain four groups of preliminary correction wavefront parameters. The rotating mask is removed, and the wavefronts of the four groups of correction wavefronts are matched to obtain a final correction wavefront signal. The application can realize accurate focusing of light after the light transmits through a scattering medium, and can realize higher light intensity gain under the same correction time.

A terminal according to one embodiment of the present disclosure is characterized by being provided with: a reception unit that receives Type 2 setting permission and setting information for two measurement reference signal (SRS) resource sets; and a control unit that controls a single DCI multi-panel that uses space division multiplexing (SDM) or a single frame network (SFN) to simultaneously transmit a physical uplink shared channel (PUSCH). According to one embodiment of the present disclosure, when a setting permission is applied, it is possible to appropriately control simultaneous transmission of a PUSCH by a single DCI and multiple panels.

Disclosed are a processing method, a communication device and a storage medium, aiming to provide a method for determining the TCI state of the PUSCH. The processing method includes: determining the TCI state of the PUSCH based on downlink information. The method relates to the technical field of communication, can be applied to transmission in spatial division multiplexing and single frequency network scheme.

Various example embodiments for supporting optical transport systems are presented. Various example embodiments for supporting optical transport systems may be configured to support optical transport systems that support multiple fibers based on use of spatial division multiplexing (SDM) techniques. Various example embodiments for supporting optical transport systems that support multiple fibers based on use of SDM techniques may be configured to support optical transport systems that support multiple fibers based on use of an anylane add / drop capability that is based on use of a Clos architecture (e.g., a spatially-switched distributed Clos architecture with a single stage of switching for network traffic that passes through the node, a spatially-switched distributed Clos architecture with two stages of switching for network traffic that passes through the node, a spatially-switched node-contained Clos architecture with three stages of switching for network traffic that passes through the node, or the like).

The invention relates to a communication method and device and a storage medium. The communication method is applied to a network device, and the method comprises the following steps: sending indication information; the indication information comprises a PT-RS-DMRS (Phase Tracking Reference Signal-Demodulation Reference Signal) association relationship indication domain, and the PT-RS-DMRS association relationship indication domain is used for indicating an association relationship between a PTRS port and a DMRS port of the terminal under space division multiplexing (SDM); the high-order 1 bit and the low-order 1 bit of the PT-RS-DMRS association relationship indication domain are respectively used for indicating the relationship between the DMRS port and the PT-RS port corresponding to different transmission receiving points TRP / panel Panel / transmission configuration indication TCI / transmission opportunity TO.

The present invention relates to a method and a device for dual-polarisation, fiber-optic SDM transmission. The transmission method uses specific I / Q coding that makes it possible to combat the effects of PDL. The modulation symbols to be transmitted on the 2N polarisation states of the N basic spatial channels are broken down into real and imaginary values (220). A real vector composed by concatenating these real values and imaginary values is then constructed. A first invertible linear transformation, represented by a dense real matrix, is applied (230) to the resulting real vector to provide a transformed real vector. Complex transmission symbols are formed by I / Q combination (240) of the components of the transformed vector, the transmission symbols then modulating the different polarisation states of the basic spatial channels.

Systems and methods for single downlink control information (DCI) based simultaneous physical uplink shared channel (PUSCH) transmission with spatial division multiplexing (SDM) using a sounding reference signal (SRS) resource set are disclosed herein. The SRS resource set may be an exclusive (e.g., single) SRS resource set for either a non-codebook-based or a codebook-based simultaneous physical uplink shared channel (PUSCH) operation. In each case, a user equipment (UE) transmits the SRS resource(s) of the SRS resource set, receives a DCI from the network that schedules a first PUSCH transmission on a first UE panel and a simultaneous second PUSCH transmission on a second UE panel, and then transmits the (simultaneous) PUSCH transmissions as scheduled. Related network-side functionality is also discussed. In cases, SRS resources (and / or one or more SRS ports used by the SRS resource) are mapped to a particular UE panel. In other cases, SRS resources use both UE panels.

Various aspects of the disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can receive a plurality of sidelink transmissions associated with a spatial division multiplexing (SDM) configuration. The UE can fail to decode at least one of the plurality of sidelink transmissions. The UE can transmit feedback indicating the failure to decode the at least one sidelink transmission, wherein the feedback includes an indication of at least one layer of the SDM configuration associated with the at least one sidelink transmission. Numerous other aspects are described.

The invention relates to the technical field of information security and digital image processing, in particular to an image holographic encryption method and system based on controllable Lyapunov index chaotic mapping. In the encryption method, a plurality of original images are fused into a single digital hologram by using an improved Gerchberg-Saxton algorithm and a space division multiplexing technology; through a simulated annealing particle swarm optimization algorithm, adaptively searching an optimal initial parameter according to hologram features, and generating a dynamic key strongly associated with a plaintext; the method comprises the following steps: constructing an improved Logistic embedded sine and cosine mapping chaotic system with a controllable Lyapunov index, and generating a chaotic sequence by using a dynamic key; and performing block adaptive cross-channel scrambling and non-linear diffusion based on a semi-tensor product on the hologram by using the chaotic sequence to obtain a final ciphertext. According to the method, the problems of capacity limitation and key management in multi-image encryption are effectively solved, and the method has extremely high differential attack resistance, noise resistance and shearing attack resistance.