Patents
Literature
227 results about "Time division multiple access" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Time-division multiple access (TDMA) is a channel access method for shared-medium networks. It allows several users to share the same frequency channel by dividing the signal into different time slots. The users transmit in rapid succession, one after the other, each using its own time slot. This allows multiple stations to share the same transmission medium (e.g. radio frequency channel) while using only a part of its channel capacity. TDMA is used in the digital 2G cellular systems such as Global System for Mobile Communications (GSM), IS-136, Personal Digital Cellular (PDC) and iDEN, and in the Digital Enhanced Cordless Telecommunications (DECT) standard for portable phones. TDMA was first used in satellite communication systems by Western Union in its Westar 3 communications satellite in 1979. It is now used extensively in satellite communications, combat-net radio systems, and passive optical network (PON) networks for upstream traffic from premises to the operator. For usage of Dynamic TDMA packet mode communication, see below.
Civil air defense construction concealed conduit leakage positioning method based on acoustic characteristics
The invention provides a civil air defense engineering concealed conduit leakage positioning method based on acoustic characteristics, and belongs to the technical field of civil air defense engineering. An acoustic signal acquisition network is constructed by deploying a high-sensitivity hydrophone array, and signals are preprocessed by using a time division multiple access technology and a pulse compression technology; and carrying out time-frequency analysis by applying wavelet transform to extract acoustic features. A time reversal mirror technology is introduced to identify direct propagation and multipath reflection signals, a fluid acoustic coupling propagation equation is constructed to analyze a leakage sound source mechanism, and pipe network topological information and a sound wave speed correction function are combined to compensate a measurement error. Wherein the deep learning pipe network acoustic propagation multi-modal model is fused with a pipeline structure encoder, an acoustic feature extractor and a position prediction decoder, and high-precision leakage positioning and degree evaluation in a complex environment are realized through a three-stage pre-training strategy; the technical problem that it is difficult to accurately locate the position of a leakage point in the complex pipe network environment of civil air defense engineering is solved.
Owner:CHINA CONSTR EIGHT ENG DIV CORP LTD
Coordinated time division multiple access (c-TDMA) in wi-fi networks for partial bandwidth transmission opportunity (TXOP) sharing
This disclosure provides methods, components, devices and systems for coordinated time division multiple access (C-TDMA) in Wi-Fi networks for partial bandwidth transmission opportunity (TXOP) sharing. Some aspects more specifically relate to coordinating TXOP sharing in time and frequency. In some examples, a first access point (AP) obtains a TXOP associated with a bandwidth, allocates a duration of the TXOP to a second AP, and selectively communicates with one or more stations (STAs) associated with the first AP via a first portion of the bandwidth within the duration of the TXOP. In other words, the first AP may selectively communicate with one or more STAs associated with the first AP within the duration of the TXOP that the first AP shared with the second AP. Various disclosed protocols and mechanisms further relate to using resources that would otherwise be unutilized within a framework of coordinated medium access.
Owner:QUALCOMM INC
Wireless communication control method and system
PendingCN121262536AError preventionBroadcast service distributionTime division multiple accessInterference resistance
The invention relates to the technical field of wireless communication, and discloses a wireless communication control method and system. The method comprises the following steps: generating a periodic configuration structure of a time slot sequence and a node list through communication period calculation and time slot type division on the basis of network topology parameters such as node quantity, distribution position, link quality, transmission delay and the like; heartbeat signal packaging is carried out by using the structure, broadcast power is calculated in combination with a time reference value, and multi-node synchronization is executed by adopting time division multiple access and frequency hopping technologies; triggering downlink data encapsulation and time slot scheduling based on the synchronization mark, generating a transmission record, and driving uplink time slot monitoring and integrity verification; uplink flow characteristics are analyzed, and anti-interference coding and power adaptive adjustment are executed after update configuration is generated, so that closed-loop verification is formed. According to the invention, the multi-node synchronization precision and the anti-interference capability are improved; optimizing the time slot resource utilization rate; and the data transmission integrity and real-time performance are ensured.
Owner:HANGZHOU BEICEN TECH CO LTD
Schedule announcement enhancements for coordinated time division multiple access
PendingUS20250331021A1Network topologiesTime-division multiplexing usageComputer networkTelecommunications
This disclosure provides methods, components, devices and systems for schedule announcement enhancements for coordinated time division multiple access (C-TDMA). Some aspects more specifically relate to a sharing AP indicating a schedule announcement for C-TDMA via a frame, such as a poll frame. The frame may include a query to determine interest of one or more shared APs to use a portion of a transmit opportunity (TXOP) obtained by the sharing AP or an indication allocating the portion of the TXOP to the shared APs. The sharing AP may receive a response to the frame via an associated poll response that may indicate an identifier of a shared AP. Various aspects relate more specifically to reallocating one or more fields in a poll frame to indicate information related to the shared TXOP.
Owner:QUALCOMM INC
Paired time division multiple access method and device in high dynamic scene
PendingCN121568231ATransmissionComplex mathematical operationsGreedy coloringTime division multiple access
The invention discloses a paired time division multiple access method and a paired time division multiple access device in a high dynamic scene. The method comprises the following steps of: mapping each link request into a vertex of a conflict graph; according to a primary conflict and secondary conflict judgment rule, adding undirected edges for vertex pairs with conflicts, and constructing a communication conflict graph; a TDPA time slot allocation problem is formalized into a minimum vertex coloring problem of a communication conflict graph; calculating to obtain a neighborhood cardinal number of each vertex through a global greedy coloring algorithm; carrying out descending sorting on the vertexes according to a neighborhood cardinal number; a minimum positive integer which is not used by a neighborhood vertex is distributed to each vertex in sequence to serve as a time slot, and an initial scheduling baseline is generated; updating the communication conflict graph based on the generated initial scheduling baseline and the current topology change information, and identifying failure vertexes; and re-coloring the failure vertexes through an incremental greedy coloring algorithm to obtain a new scheduling scheme. According to the invention, the problems of low channel utilization rate, poor real-time response, insufficient dynamic adaptability and the like in the prior art are solved.
Owner:NAT UNIV OF DEFENSE TECH
Unmanned aerial vehicle swarm networked measurement and control communication system and communication method
PendingCN120166375AParticular environment based servicesVehicle wireless communication serviceQuality of serviceEngineering
The invention relates to the technical field of communication, and provides an unmanned aerial vehicle swarm networked measurement and control communication system and method, and the architecture of the communication system comprises a network layer, a link layer and a physical layer. A routing protocol in the network layer uses a cross-layer pulse routing protocol, and all nodes multiplex a neighbor connection relationship in two hops of the link layer in a cross-layer manner; the link layer adopts a pre-allocation and dynamic negotiation resource management strategy based on a time division multiple access protocol and a storage scheduling strategy based on a service quality level; and the physical layer adopts an MIMO technology and an adaptive modulation and coding technology, and supports different service transmission requirements of multiple users. According to the invention, the problems of low channel utilization rate and slow response to dynamic topology change can be solved, and high-capacity information transmission, inter-aircraft cooperative information distribution and unmanned aerial vehicle networked measurement and control services are supported at the same time.
Owner:CHENGDU HANLIAN JIUXIAO TECHNOLOGY CO LTD
Photovoltaic cleaning robot multi-machine task scheduling and collaborative operation method and system, electronic equipment and storage medium
ActiveCN120821279AVehicle position/course/altitude controlPosition/direction controlMachineNetwork communication
The invention provides a photovoltaic cleaning robot multi-machine task scheduling and collaborative operation method and system, electronic equipment and a storage medium, and relates to the technical field of multi-machine task scheduling and collaborative operation, and the method comprises the steps: obtaining the position and speed information of each robot in a robot cluster, and constructing a dynamic adjacency graph model; controlling each robot to interact information through an ad hoc network communication relay node by using a time division multiple access protocol, controlling communication delay and broadcasting obstacle information in real time; dividing a to-be-cleaned area based on related information, determining task sub-areas, and realizing adaptive distribution of tasks according to models; and finally, in the cleaning process, by fusing the swarming control of the artificial potential field method, the adjacent robots synchronously clean the boundary and adjust the track, multi-machine efficient collaborative operation of the photovoltaic cleaning robot can be achieved, and the cleaning efficiency and flexibility are improved.
Owner:TIANJIN TIANJING FEIHANG TECHNOLOGY CO LTD
Industrial remote controller system based on LoRa technology and real-time reliable communication control method thereof
The invention discloses an industrial remote controller system based on a LoRa technology and a real-time reliable communication control method thereof, and belongs to the technical field of industrial wireless control, and the method specifically comprises the steps: collecting communication link quality parameters, constructing a multi-dimensional link quality evaluation model, and outputting a link quality score; a LoRa physical layer parameter is dynamically adjusted by using a fuzzy logic decision algorithm based on the score, an optimized parameter configuration table is obtained, a bidirectional handshake protocol is established, and an encrypted instruction-response data packet is generated; the central coordinator allocates time division multiple access time slots according to the link quality score, and the industrial remote controller sends encrypted data in the corresponding time slots by using hybrid error correction codes; the controlled equipment receives the data execution instruction, generates a feedback data packet containing an execution state, and returns the feedback data packet to the industrial remote controller through a time division multiple access time slot; the method improves the real-time performance and reliability of the communication of the industrial remote controller.
Owner:NANJING TIEFULAI SPECIAL ROBOT CO LTD
Wireless monitoring system
PendingCN120897172AParticular environment based servicesNetwork topologiesWireless transmissionTime division multiple access
The invention discloses a wireless monitoring system which comprises a multi-parameter wireless sensing terminal, an anti-interference wireless transmission link, an intelligent host receiving system and an emergency backup module. The multi-parameter wireless sensing terminal collects and sends various types of equipment and environment parameters, the anti-interference wireless transmission link guarantees transmission through time division multiple access and the like, the intelligent host receiving system receives and analyzes data, predicts the parameter trend and links an external system, and the emergency backup module caches or takes over the data when a host is abnormal. According to the invention, the limitation of single parameter monitoring is broken through, and multi-dimensional equipment health monitoring is realized; the data transmission stability and integrity are ensured; equipment faults are early warned in advance, and an external system is linked for rapid handling; the endurance of the multi-parameter wireless sensing terminal is prolonged, the long-term operation requirement is met, and the problem of multiple pain points in the prior art is solved.
Owner:PUYANG GUOSHENG MACHINING CO LTD
Error condition management in time division multiple access
PCT designated stageWO2025221438A1Wireless communicationComputer networkTime division multiple access
This disclosure provides methods, components, devices and systems for error condition management in time division multiple access. Some aspects more specifically relate to recovery procedures for error conditions associated with shared transmission opportunities (TXOPs) for a channel. A sharing access point (AP) may perform a recovery procedure to request control of the channel based on the absence of an expected response message from a shared AP. The expected response message may be in response to a message announcing that the sharing AP will share one or more portions of a TXOP controlled by the sharing AP or a message that allocates a portion of the TXOP to a specific shared AP. A shared AP may perform a contention process to access the channel based on the absence of an expected TXOP allocation frame after reception of scheduling announcement from a sharing AP for a TXOP.
Owner:QUALCOMM INC
Schedule announcement enhancements for coordinated time division multiple access
PCT designated stageWO2025221427A1Network topologiesTime-division multiplexing usageComputer networkTelecommunications
This disclosure provides methods, components, devices and systems for schedule announcement enhancements for coordinated time division multiple access (C-TDMA). Some aspects more specifically relate to a sharing AP indicating a schedule announcement for C-TDMA via a frame, such as a poll frame. The frame may include a query to determine interest of one or more shared APs to use a portion of a transmit opportunity (TXOP) obtained by the sharing AP or an indication allocating the portion of the TXOP to the shared APs. The sharing AP may receive a response to the frame via an associated poll response that may indicate an identifier of a shared AP. Various aspects relate more specifically to reallocating one or more fields in a poll frame to indicate information related to the shared TXOP.
Owner:QUALCOMM INC
Signaling details for coordinated time division multiple access
This disclosure provides methods, components, devices and systems for signaling details for coordinated time division multiple access (C-TDMA). Some aspects more specifically relate to signaling details for coordinated time division multiple access. In some examples, an access point (AP) may perform a channel access procedure to obtain access to a wireless medium for communications during a transmission opportunity (TXOP). In some examples, the AP (such as a sharing AP) may share the TXOP with another AP (such as a shared AP) during at least a portion of the TXOP. The sharing AP may transmit one or more messages indicating communication parameters for a second AP to share the portion of the TXOP.
Owner:QUALCOMM INC
Internet of vehicles optimization method and system based on edge calculation and time division multiple access
PendingCN121334685AParticular environment based servicesVehicle infrastructure communicationDisaster areaThe Internet
The invention belongs to the technical field of wireless communication, and discloses an Internet of Vehicles optimization method and system based on edge computing and time division multiple access, and the method comprises the steps: carrying out the joint optimization of service deployment and replacement, RSU deployment, access control, and task unloading rates in VTUs and RSUs, and achieving the optimization of the Internet of Vehicles. And efficient, low-delay and stable task processing service is provided for vehicle-mounted communication in urban traffic, expressways or disaster areas. According to the method, a double-time-scale optimization strategy is adopted, the decision of service deployment and replacement is carried out on a coarse-grained time scale (frame), and other optimization problems are processed in a fine-grained time scale (time slot). The invention provides an innovative hierarchical DRL algorithm, and in the algorithm, a high-level agent adopts a deep Q network (DQN) proxy and is responsible for optimizing a service deployment and replacement strategy in a frame; and the bottom layer intelligent agent adopts a depth deterministic policy gradient (DDPG) for proxy, and specially solves related optimization problems of task unloading rate, access control and the like in the time slot.
Owner:XIAN UNIV OF POSTS & TELECOMM
Time slot scheduling method for underwater dynamic multi-hop distribution network based on time division multiple access protocol
ActiveCN116647287BTransmissionHigh level techniquesTime division multiple accessTransmission time delay
The application discloses a time slot scheduling method of an underwater dynamic multi-hop distribution network based on a time division multiple access protocol, relates to the field of underwater acoustic communication, and is aimed at the underwater multi-hop distribution network, improves the traditional static time slot allocation based on the TDMA protocol, designs a data packet frame structure, comprehensively considers transmission time delays among underwater nodes, dynamically adjusts time slots allocated to the underwater nodes based on the maximum transmission time delay, considers a dynamic node random access condition, and realizes the design of the time slot scheduling method of the underwater dynamic multi-hop distribution network.Compared with the traditional static time slot allocation method, the method can effectively improve the overall throughput of the network and optimize the network operation efficiency.
Owner:CHINA SHIP SCIENTIFIC RESEARCH CENTER +1
Main and auxiliary engine communication control method for multiple marine propellers
PendingCN120681316APropulsion power plantsPropulsive elementsWireless communication protocolTime division multiple access
A main and auxiliary engine communication control method for multiple ship propellers relates to the technical field of ship power control, and comprises a main control propeller and a plurality of auxiliary control propellers, the main control propeller is installed at the leftmost position of a ship body tail plate, and the auxiliary control propellers are installed at other positions of the ship body tail plate in parallel. MAC addresses with the same mark code segment are pre-burnt in the main control propeller and the auxiliary control propeller; the master control propeller establishes a bidirectional data link with the remote controller through a wireless communication protocol; a single-hop star topology network is established between the main control propeller and the auxiliary control propellers, and the main control propeller sends a composite instruction packet to each auxiliary control propeller through a single broadcast channel; and each auxiliary control thruster returns state data to the main control thruster through an independent time division multiple access uplink channel. According to the invention, the defects in the prior art are overcome, the rapid identification and accurate positioning of the equipment are realized, the management and maintenance of the system are simplified, and the flexibility and expandability of the system are greatly improved.
Owner:SHANGHAI FENGHE RUILI POWER TECHNOLOGY CO LTD
Framework for TDMA based multi-AP coordination
A method and device for a framework for time division multiple access (TDMA) based multi-access point (MAP) coordination. A method of wireless communication performed by a first access point (AP) comprises transmitting, to a second AP, a message including coordination information for coordinating with the first AP on a basis of MAP. The method includes negotiating, with the second AP, a MAP coordination mechanism to be used for the MAP coordination; and forming a MAP coordination group based on the negotiated MAP coordination mechanism.
Owner:SAMSUNG ELECTRONICS CO LTD
Cooperative transmission method, device, medium and product
Owner:SANECHIPS TECH CO LTD
Relative navigation method and system suitable for measurement asynchronization and communication delay processing
PendingCN121933016ANavigational calculation instrumentsNavigation by speed/acceleration measurementsData packTime division multiple access
The invention discloses a relative navigation method and system suitable for measurement asynchronization and communication delay processing, and relates to the field of navigation. The method solves the problems of measurement asynchronization, communication delay and the like of an existing measurement sharing relative navigation method in practical application. The method comprises the following steps: establishing a total error state equation of a relative navigation system for nodes in a cluster; establishing a multi-source measurement equation of a relative navigation system for the nodes in the cluster; based on a time division multiple access in-turn broadcast type communication mechanism, information data packets are shared by each node in the cluster; constructing a time updating equation and a measurement updating equation, and performing filter time updating and measurement updating; carrying out inertial navigation position extrapolation aiming at measurement asynchronization and communication delay to realize accurate alignment of measurement information containing lagging and an inertial navigation position in time; correcting the error feedback and outputting a relative navigation result. The method is also suitable for the application fields of relative navigation algorithms for measuring asynchronization and communication delay processing and the like.
Owner:HARBIN ENG UNIV
Method for network coverage of overhead transmission line in unpopulated areas
The application provides a kind of unmanned area overhead transmission line network coverage method, along the line deployment multiple as intelligent spacer intelligent network node, node uses modular hot plug structure, equipped with super capacitor and solid-state battery hybrid energy storage system;Through LoRa communication to build distributed wireless mesh ad hoc network, combined with TDMA time division multiple access and AODV adaptive routing protocol;Utilize the power supply of at least two different principle of multi-source fusion self-powered module power supply;Node collects line monitoring data and carries out edge computing processing, and the processed data is transmitted through multi-hop relay transmission of ad hoc network, and then transmitted to the center master station through the main and standby dual-link redundant transmission architecture.The application can realize long-term stable self-power supply and reliable communication of unmanned transmission line, improve the real-time performance of monitoring data transmission and network invulnerability.
Owner:SHANGHAI KUNHUA TECHNOLOGY CO LTD
Network-free video transmission scheme implementation method
ActiveCN121310235ANetwork topologiesClosed circuit television systemsPathPingTime division multiple access
The invention relates to the technical field of wireless communication, and discloses a network-free video transmission scheme implementation method, which comprises the following steps of: firstly, calculating a fitness score according to comprehensive performance parameters such as residual electric quantity and computing resources of nodes through a distributed election algorithm, and electing a unique main control device; then, the main control equipment collects neighbor list information of nodes of the whole network, constructs a weighted global network topological graph, and calculates an optimal relay path with the lowest link cost for a video transmission task based on the topological graph; and finally, the main control equipment generates and broadcasts a global unified time division multiple access time slot allocation table, and accurately allocates conflict-free sending and relay time slots for each node on the optimal path. According to the method, the flexibility of distributed election and the certainty of centralized scheduling are combined, network data collision is effectively avoided, and the reliability and the real-time performance of video transmission in a dynamic and network-free environment are remarkably improved.
Owner:SHENZHEN ASMAX INFINITE TECH CO LTD
A time slot allocation method based on a manta ray algorithm for time division multiple access
The application relates to a time division multiple access time slot allocation method based on a manta ray algorithm and belongs to the technical field of communication networking. The application divides a time frame into an information collection period and a time slot allocation period, and further divides the time slot allocation period into a dedicated time slot period and a dynamic time slot period. In the information collection period, a central node collects time slot application requests of other nodes, judges whether the nodes can continue to apply according to relevant criteria, and gives the nodes priorities according to the traffic volume and the service importance of the nodes. In the dedicated time slot allocation period, high-priority nodes are allocated by using a binary tree block internal equal division method. In the dynamic time slot allocation period, the manta ray algorithm is used to allocate time slots to other nodes. The application is relatively simple to implement, guarantees absolute transmission of the nodes, considers the priorities of the nodes, meets burstiness and long message transmission of the nodes, improves the convergence speed of the algorithm, and improves the overall performance of the network.
Owner:GUANGZHOU INSTITUTE OF TECHNOLOY XIDIAN UNIVERSITY
Coordinated Access Point Transmission
The present disclosure provides methods, apparatuses, and systems for sharing resources of a wireless medium. Certain implementations more specifically relate to coordinated AP (CAP) time division multiple access (TDMA) and orthogonal frequency division multiple access (OFDMA) techniques for sharing time or frequency resources of a transmission opportunity (TXOP). According to such techniques, an AP that wins contention for the duration of a TXOP and obtains access to the wireless medium can share its time or frequency resources with other selected APs. To share its resources, the winning AP can divide the TXOP into multiple time or frequency segments, each time or frequency segment including corresponding time or frequency resources representing a portion of the TXOP, and allocate each of these time or frequency segments to the winning AP itself or to one of the selected APs.
Owner:QUALCOMM INC
Method and system for dynamic allocation of underwater acoustic communication system resources
The application relates to the technical field of underwater acoustic communication, and discloses a method and system for dynamically allocating resources of an underwater voice communication system. The method comprises the following steps: setting a multi-user priority strategy according to a formation modular grouping; adopting a hybrid access mechanism of fusion of time division multiple access and carrier sense multiple access / collision avoidance, dividing communication channels into inter-group time slots and intra-group time slots, and competing for access to idle sub-carrier clusters in the time slots through a CSMA / CA mechanism; predicting a future state of an underwater acoustic channel; based on the predicted future state, adaptively switching a modulation and coding scheme according to a preset signal-to-noise ratio threshold; distributing sub-carrier bands to users with the largest channel gain based on a channel gain matrix; and combining the multi-user priority strategy, the hybrid access mechanism and the modulation and coding scheme to jointly optimize and distribute sub-carriers, bit loading and transmission power. Through dynamic resource allocation and adaptive transmission optimization, the application effectively improves the resource utilization rate and transmission quality of underwater voice communication.
Owner:SICHUAN JIUZHOU ELECTRIC GROUP CO LTD
Optical architectural solution for coherent burst mode transmitter
PCT designated stageWO2026117354A1Time-division optical multiplex systemsElectromagnetic transmittersThermoelectric coolingBurst transmission
A coherent transmitter (100, 200) for use in a time division multiple access (TDMA) system is operated in multiple states to enable coherent burst transmission. In an OFF state, the transmitter (100, 200) generates a dummy laser output (fd) from either a dummy laser (102) or an active laser (52) tuned to a dummy frequency different from an active frequency (fa), thereby maintaining thermal and bias stability without adding excess power on an upstream channel (22). In an ON state, the active laser (52) produces an active laser output (fa) that is modulated by a quad-parallel Mach-Zehnder (QPMZ) modulator (60) to transmit data. A thermoelectric cooler (TEC) (58) stabilizes laser temperatures, and a variable optical attenuator (VOA) (54) controls output power. The transmitter (100, 200) is suitable for an optical network unit (ONU) (14) in a passive optical network (PON) (10) communicating with an optical line terminal (OLT) (12).
Owner:CIENA CORP
Method for detecting access signal in wireless ad hoc network
The invention discloses a method for detecting access signals in a wireless ad hoc network, and relates to the technical field of wireless broadband ad hoc networks. Based on a TDMA (Time Division Multiple Access) scheme, a plurality of subframes are divided in a frame structure, one or more subframes in the subframes are used as synchronous subframes, the synchronous subframes are composed of a plurality of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the last one or two symbols of the synchronous subframes are dynamically appointed as idle time slots according to resource use conditions and are used as detection access signals, so that users access signals or synchronous signals. According to pre-allocated parameters, determining the condition of sending a signal by detecting the access signal: whether the sending signal occupies all spectrum resources and whether subcarriers of the sending signal are continuous; and according to the condition of the transmitted signal, calculating time synchronization in the frequency domain or the time domain, estimating the frequency deviation in the frequency domain or the time domain, and estimating the power of the signal in the frequency domain or the time domain for controlling the power of the transmitted signal.
Owner:INSPUR INTELLIGENT TECHNOLOGY (JIANGSU) CO LTD
Slow Phase Time Division Multiple Access (SP-TDMA) Modulation Scheme for MIMO Radar
PendingJP2025542354ARadio wave reradiation/reflectionTime division multiple accessTime-division multiplexing
A millimeter-wave automotive radar is disclosed that includes a plurality of millimeter-wave transmitters configured to simultaneously transmit phase-encoded signals according to a phase modulation scheme, and a plurality of subarrays operatively coupled to respective ones of the plurality of millimeter-wave transmitters, each subarray including a predefined number of transmitter elements, and configured to transmit the phase-encoded signals received from a respective one of the millimeter-wave transmitters from other subarrays in different, mutually orthogonal time slots using time division multiplexing.
Owner:プロビジオ リミテッド
A battery data transmission method and system based on dynamic priority preemption time slots
PendingCN122179904ASecondary cells servicing/maintenanceWireless communicationElectrical batteryData transmission time
The application relates to a battery data transmission method and system based on dynamic priority preemption time slots, which comprises the following steps: calculating the dynamic priority of a distributed node according to the data urgency, historical channel quality and basic priority of the distributed node; pre-empting the battery data transmission time slot according to the dynamic priority to perform battery data transmission; and performing a two-stage retransmission strategy to retransmit the battery data when the data transmission fails. The application breaks through the limitation of the fixed time slot allocation of the traditional time division multiple access communication strategy and adapts to the burst communication demand; when the wireless center node based on dynamic priority preemption performs time slot allocation and battery data retransmission, the communication conflict and real-time contradiction in the dense node scene can be effectively solved through software, the reliability, real-time performance and expandability of the system are significantly improved, and the application is suitable for intelligent battery system, electric vehicle, energy storage power station and other high-performance wireless center node application scenes.
Owner:四川新能源汽车创新中心有限公司 +1
A hybrid channel allocation method for wireless ad hoc networks
ActiveCN115665768BHigh level techniquesWireless communicationTime division multiple accessReliable transmission
The present invention relates to a hybrid channel allocation method applicable to wireless self-organizing networks in the field of wireless self-organizing networks, and is particularly applicable to wireless self-organizing network environments that adopt a time division multiple access (TDMA) mechanism. First, the network cluster head node centrally allocates dedicated channels for newly connected nodes, which can ensure the reliable transmission of time-sensitive services of each node; at the same time, considering that the dedicated channel of each node has the characteristic of being spatially reused by nodes beyond two hops, a mechanism for locally maintaining a shared channel list is designed, and a mechanism for competing to occupy a shared channel on a reserved channel is proposed, which can avoid collisions caused by reservation message conflicts and reduce the number of information interactions in competing for a shared channel, ultimately meeting the large-capacity data transmission needs of each node. The hybrid channel allocation method of the present invention makes full use of all channel resources of the network, is simple and easy to implement, and can effectively improve the transmission capacity of the entire network.
Owner:THE 54TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
Aerial mobile communication method and system based on time division multiple access
The invention relates to an aviation mobile communication method and system based on time division multiple access, belongs to the technical field of satellite communication, and solves the technical problem of low communication quality between a satellite ground station and a mobile communication terminal. Comprising the following steps: in a communication time slot allocated to aviation mobile communication terminals, each aviation mobile communication terminal dispersedly inserts each unique code in a unique code original sequence for auxiliary synchronization into a to-be-sent information code element to construct and obtain a burst signal, and sends the burst signal based on the current sending power; transparently forwarding the burst signal to a satellite ground station by using a satellite transponder; and the satellite ground station extracts the scattered unique codes from the received burst signals, and synchronizes and demodulates the burst signals based on the unique codes to recover the information code elements. And the communication quality between the aviation mobile communication terminal and the satellite ground station is improved.
Owner:36TH RES INST OF CETC
Communication system and method of Wi-Fi soft scheduling system based on TSF synchronization token bucket, computer equipment and medium
The invention discloses a Wi-Fi soft scheduling system based on a TSF synchronization token bucket, a communication method, computer equipment and a medium. The system comprises a high-precision TSF synchronization module, a TSF synchronization token bucket gating module and a driving layer scheduling injection and conflict protection module. The high-precision TSF synchronization module is used for providing a uniform time reference with microsecond-level precision and processing system-level errors; the TSF synchronization token bucket gating module is used for realizing time slot scheduling of pseudo TDMA through double constraints of time and capacity, and controlling the authority of a data packet to enter an MAC (Media Access Control) layer; and the driving layer scheduling injection and conflict protection module is used for realizing low-delay transmission injection of the authorization data packet and processing the damage of the competition conflict of the MAC layer to the scheduling certainty through a time slot conflict isolation mechanism. According to the invention, accurate soft control of a data packet transmission time sequence can be realized on a kernel driving layer of an operating system, so that a deterministic time division multiple access effect is simulated on a channel.
Owner:深圳开鸿数字产业发展有限公司