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34results about How to "Improve channel conditions" patented technology

Method for service allocation in layered network

This invention relates to a method for distributing services in a hierarchical network including: distributing low speed service to a macro-area in large cover sphere and small volume by the kind of the area and the kind of the service applied by the user so as to eliminate the interference to the users in the micro-areas by the low speed service, distributing the high speed data service to the micro-areas in small cover conditions and better channel conditions to provide high quality data transmission for the high speed data service.
Owner:HUAWEI TECH CO LTD

Car networking data transmission route selection optimized method based on electronic eyes

The invention relates to a car networking data transmission route selection optimized method based on electronic eyes. The car networking data transmission route selection optimized method comprises the following steps: (1) the electronic eyes collect traffic video images in real time; (2) a video processing module extracts traffic parameters according to the traffic video images; (3) a cloud computing platform affirms traffic flow state information according to the traffic parameters by combining the national road service level table; (4) a roadside unit broadcasts the traffic flow state information to car nodes, after each car node receives the traffic flow state information, the car nodes are adjusted in a self-adaptation mode and send the broadcast cycle of beacon news; (5) a car source node confirms crossroads where a data transmission route connected between the car source node and a car destination node may pass through according to an electronic map; and (6) the car source node selects the optimized route to send data according to the traffic flow information among the crossroads where the data transmission route may pass through. Compared with the prior art, the car networking data transmission route selection optimized method based on the electronic eyes has the advantages of being reliable in communication, high in promptness of data transmission, and the like.
Owner:TONGJI UNIV

Method and apparatus for uplink power control in wireless communication system

A method and an apparatus for uplink power control in a wireless communication system are provided. More specially, a method is provided in which a first base station in a wireless communication system periodically measures interference for a cell of a second base station neighboring the first base station, determines an average of the periodically measured interference, broadcasts the determined average of the periodically measured interference to mobile terminals located in a cell of the first base station, determines a weight for the determined average of the periodically measured interference, based on one of resource allocation information for the cell of the second base station and whether a specific message for interference regulation is received from the second base station, and transmits the determined weight to the mobile terminals.
Owner:SAMSUNG ELECTRONICS CO LTD

Method, equipment and system for selecting service cell

The invention discloses a method, a piece of equipment and a system for selecting a service cell and belongs to the field of communication. The method comprises the following steps: strong-interference terminals of one or more corresponding micro base stations among terminals served by a macro base station are determined, wherein the one or more micro base stations are arranged in a macro cell served by the macro base station; and uplink communication of the determined strong-interference terminals is switched to micro cells served by the corresponding micro base stations so as to take the micro cells served by the corresponding micro base stations as uplink service cells of the strong-interference terminals. The strong-interference terminals of the corresponding micro base stations are determined among the terminals served by the macro base station, and the micro cells served by the micro base stations are taken as the uplink service cells of the terminals, which can reduce the transmission power and power consumption of the terminals; and meanwhile, the interference to the micro base station is reduced, and the service performance of the micro base station is improved. In addition, after the terminals are switched to the micro cells, the macro cell can allocate more time-frequency resources to other terminals in the service range, thus improving the service performance of the macro cell.
Owner:HUAWEI TECH CO LTD

Industrial field data multi-priority scheduling method based on 5G slicing

The invention discloses an industrial field data multi-priority scheduling method based on 5G slicing. The method comprises the steps that S1, a 5G base station acquires resource request data and channel state data of industrial field users; S2, the scheduler of the 5G base station judges whether the task cache queue is empty or not in the tth scheduling period; if the current scheduling period isempty, waiting for the next scheduling period, and if the current scheduling period is non-empty, entering S3; S3, the scheduler of the 5G base station allocates corresponding resources to differentslices according to the resource request data of the user; S4, resource scheduling is carried out on the users in the same slice. According to the invention, resource allocation of three major 5G slices is completed, flexible scheduling and isolation of resources among the slices are ensured, the throughput of the system is improved, and the fairness of the scheduling method for different servicequality requirements is improved at the same time.
Owner:CHONGQING UNIV

Wireless sensor network beam forming transmission array node selecting method

In the field of distributed wireless sensor network long-distance communication, the communication distance and the energy of a single node are limited, a multi-hop mode is used, bit error rate is high, and time delay is large. Accordingly, the invention discloses a cooperative communication mode of wireless sensor network beam forming transmission and a node selecting method. First, the smallest node number needed for forming a virtual antenna array is determined; then an ideal antenna direction picture of the array is determined, according to the ideal direction picture, the conditions such as array shapes and node space distance are determined, and nodes which accord with the conditions are selected to form the antenna array; and finally the nodes are managed, array nodes are coordinated, time sequence is unified, and data are sent in a combination mode in a beam forming manner. According to the method, the problem that time delay is too high, and energy loss is too large due to traditional wireless sensor network long-distance multi-hop communication can be effectively avoided, communication success probability is improved, and network lifetime is prolonged.
Owner:JILIN UNIV

Channel resource allocation method based on greedy coloring of directed hypergraph

The invention discloses a channel resource allocation method based on greedy coloring of a directed hypergraph. The method comprises the following steps: establishing a channel resource allocation model with constraint conditions according to the interference condition and resource reuse characteristics of an NOMA enhanced cellular and D2D heterogeneous network and the service quality requirementof a communication link allowed to be accessed, then constructing a directed hypergraph according to the channel resource allocation model, the vertexes being cellular users and D2D clusters, and thedirected edges representing interference between communication links; and finally, performing orderly greedy coloring on the constructed directed hypergraph, adopting different colors to represent different channel resources, wherein a coloring result is a channel resource allocation result. According to the invention, a channel resource allocation model is established, a channel resource allocation problem is converted into an optimization problem for maximizing the system capacity, the constructed directed hypergraph more comprehensively and specifically represents accumulated interference and asymmetric interference between links, ordered greedy coloring is adopted, the coloring complexity is reduced, and more accurate and simpler allocation of channel resources can be realized.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Power carrier communication system of cable shielding layer

InactiveCN102629882AStable structureThe influence of small electric loadPower distribution line transmissionCarrier signalConductor Coil
The invention discloses a power carrier communication system of a cable shielding layer, which comprises a plurality of power supply cable connectors, power supply cables, a plurality of cable shielding layer grounding wires, a plurality of inductive couplers, a plurality of power line carrier machines, and a plurality of data terminal equipment, wherein each power supply cable connector is in circuit connection with a cable inside a corresponding distribution substation; the power supply cables are in circuit connection between the power supply cable connectors, and the cable shielding layer is formed by the power supply cables and the a plurality of power supply cable connectors; the cable shielding layer grounding wires are in circuit connection with the corresponding power supply cable connectors; each inductive coupler comprises a primary side winding and a secondary side winding, one end of the primary side winding is earthed, and the other end of the primary side winding is in circuit connection with the corresponding cable shielding layer grounding wire; the power-line carrier machines are in circuit connection with the secondary side windings of the corresponding inductive couplers; and the data terminal equipment is in circuit connection with the power line carrier machines. According to the invention, by adopting the cable shielding layer to perform long-distance information transmission of medium-voltage carrier signals, the passage state is good, the attenuation is low and the impedance change is low.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1

Method for determining resource distribution priority and device thereof

The invention discloses a method for determining a resource distribution priority and a device thereof. The method comprises the following steps: obtaining an objective transmission time-delay value of an accepted real-time service in the current resource distribution time interval; judging whether the actual transmission time-delay value of the real-time service in the current resource distribution time interval is more than the obtained objective transmission time-delay value; if yes, determining an adjustment parameter for adjusting the resource distribution priority of the real-time service based on the actual transmission time-delay value and the objective transmission time-delay value of the real-time service; and adjusting the resource distribution priority of the real-time service based on the determined adjustment parameter. By adopting the technical scheme, larger transmission opportunity can be given to the real-time service with better channel condition.
Owner:CHINA MOBILE COMM GRP CO LTD

Cross-layer cooperative transmission protocol in multi-hop wireless Ad Hoc network and application thereof

The invention discloses a cross-layer cooperative transmission protocol in a multi-hop wireless Ad Hoc network and an application thereof. In the protocol, an information receiver and a cooperative relay in one hop are determined at the same time, the receiver is closer to a target node, and the cooperative relay has a better channel condition. Furthermore, as an inter-flow signal reference problem caused by transmission of multiple information flows existing in the network is considered, an interference factor is introduced while the cooperative relay is selected in the protocol. As a result, the selected cooperative relay while transmitting information has relatively low interference to other information flows. The basic principle and method of the invention can be applied to a multi-hop multi-flow wireless Ad Hoc network in a Rayleigh fading environment.
Owner:安徽省模式识别信息技术有限公司

Large-scale MIMO signal detection method based on LLL-SD

The invention relates to a large-scale MIMO signal detection method based on LLL-SD, which belongs to the technical field of communication testing. The method comprises steps of multiplying an initialchannel matrix by a transformation matrix to obtain a plurality of initial bases, performing LLL reduction on the plurality of initial bases at the same time to generate a plurality of reduction bases with performance differences, and selecting a reduction base with the optimal performance to obtain a channel matrix and a transformation matrix T with good orthogonality and fewer condition numbers, and performing QR decomposition on the channel matrix to obtain an upper triangular matrix and a unitary matrix, multiplying conjugate transpose of the unitary matrix by the received signal vector yto obtain an equalized signal of the received signal, performing serial interference elimination by using characteristics of the upper triangular matrix, and performing decoding by using an SD algorithm of an adaptive sphere radius. According to the method, a plurality of initial bases are used for improving channel conditions, the limitation that a traditional lattice reduction algorithm only starts searching from a single group of bases can be broken through, the algorithm complexity is low, convergence is fast, the error rate of the system is reduced, and reliability is improved.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Communication resource allocation method and apparatus, and electronic device

The embodiment of the invention provides a communication resource allocation method and device and electronic equipment. The method is applied to a control device in a multi-cell NOMA network. The method comprises the following steps: when entering each preset downlink time slot, acquiring a first channel response from each base station to each terminal device on each sub-channel, a second channel response from each intelligent reflecting surface to each terminal device on each sub-channel, and a third channel response from each base station to each intelligent reflecting surface on each sub-channel in the current downlink time slot; determining a target communication resource allocation scheme in the current downlink time slot based on each acquired channel response and each preset constraint; and controlling the plurality of terminal devices, at least one intelligent reflecting surface and the plurality of base stations to allocate corresponding communication resources for themselves according to the target communication resource allocation scheme. Compared with the prior art, by applying the scheme provided by the embodiment of the invention, the information transmission performance in the multi-cell NOMA network can be improved.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Mountain river pebble beach group linked renovation method based on gradient principle

InactiveCN104264625ACompatible with water movement characteristicsReduce compositionStream regulationHydraulic modelsFluvialModel test
The invention discloses a mountain river pebble beach group linked renovation method based on a gradient principle. The mountain river pebble beach group linked renovation method is characterized by setting two control conditions needed in shoal channel flow renovation, namely the unit discharge control condition and the gradient control condition, and construction and management are conducted by obtaining submerged dike specification data through a water conservancy simulation test according to the control conditions. In the control conditions, the linkage condition and the gradient principle of riverbeds are sufficiently considered, the number of model test groups is greatly reduced, the shoal renovation success probability is improved; finally the channel size can be better improved, the flow state can be improved and the silt is prevented from accumulating in the channel after obtained submerged dike data are implemented. Meanwhile, the submerged dike has the advantages of being simple in structure, fast and convenient to implement, low in implementation cost, good in strength and impact resistance and long in service life, and is suitable to be used in mountain rivers.
Owner:长江航道局 +2

Network side equipment, micro signal amplifier and communication signal processing method and system thereof

The invention relates to network side equipment, a micro signal amplifier and a communication signal processing method and system thereof; the network side equipment communication signal processing method comprises the following steps: building a MSA pool for a target user device launching a service request; using a corresponding base station to send MSA pool building decision information to MSAs in the MSA pool, allowing all MSAs in the MSA pool to amplify and emit received communication signals, thus enabling the target user device to select the optimal residence community and reside; selecting MSAs satisfying preset conditions from the MSA pool, and creating a service MSA list; using the corresponding base station to send resource distribution decision information to MSAs in the MSA list, thus allowing the MSAs in the MSA list to use an adaptive amplification function to amplify and emit the received communication signals. The method and system can select the micro signal amplifier for the target user device, thus improving the user device communication quality.
Owner:BEIJING SPREADTRUM HI TECH COMM TECH CO LTD

Method, equipment and system for selecting serving cell

The invention discloses a method, a piece of equipment and a system for selecting a service cell and belongs to the field of communication. The method comprises the following steps: strong-interference terminals of one or more corresponding micro base stations among terminals served by a macro base station are determined, wherein the one or more micro base stations are arranged in a macro cell served by the macro base station; and uplink communication of the determined strong-interference terminals is switched to micro cells served by the corresponding micro base stations so as to take the micro cells served by the corresponding micro base stations as uplink service cells of the strong-interference terminals. The strong-interference terminals of the corresponding micro base stations are determined among the terminals served by the macro base station, and the micro cells served by the micro base stations are taken as the uplink service cells of the terminals, which can reduce the transmission power and power consumption of the terminals; and meanwhile, the interference to the micro base station is reduced, and the service performance of the micro base station is improved. In addition, after the terminals are switched to the micro cells, the macro cell can allocate more time-frequency resources to other terminals in the service range, thus improving the service performance of the macro cell.
Owner:HUAWEI TECH CO LTD

A Large-Scale MIMO Signal Detection Method Based on LLL-SD

The invention relates to a large-scale MIMO signal detection method based on LLL-SD, which belongs to the technical field of communication testing. The method comprises steps of multiplying an initialchannel matrix by a transformation matrix to obtain a plurality of initial bases, performing LLL reduction on the plurality of initial bases at the same time to generate a plurality of reduction bases with performance differences, and selecting a reduction base with the optimal performance to obtain a channel matrix and a transformation matrix T with good orthogonality and fewer condition numbers, and performing QR decomposition on the channel matrix to obtain an upper triangular matrix and a unitary matrix, multiplying conjugate transpose of the unitary matrix by the received signal vector yto obtain an equalized signal of the received signal, performing serial interference elimination by using characteristics of the upper triangular matrix, and performing decoding by using an SD algorithm of an adaptive sphere radius. According to the method, a plurality of initial bases are used for improving channel conditions, the limitation that a traditional lattice reduction algorithm only starts searching from a single group of bases can be broken through, the algorithm complexity is low, convergence is fast, the error rate of the system is reduced, and reliability is improved.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

A data compression method for ultra-long linear ring wireless network

The invention relates to a method for compressing data in an ultra-long linear annular wireless network. Each sensor in the wireless network is arranged according to an ultra-long linear annular distributed data transmission model, and all sensor nodes are divided into several clusters, and the sensors in each cluster The nodes include a cluster head node and several non-cluster head nodes; the initial sequence of data in the non-cluster head nodes is converted by a ring-shaped distributed 5 / 3 integer wavelet frequency division algorithm to obtain a wavelet coefficient sequence, and the high-level wavelet coefficient sequence in the wavelet coefficient sequence The frequency coefficient sequence is filtered by a threshold value to obtain a simplified wavelet coefficient sequence, and finally the simplified wavelet coefficient sequence is transmitted to the cluster head node. In the cluster head node, the simplified wavelet coefficient sequence is compressed by quasi-run encoding and transmitted to the base station node. Compared with the prior art, the present invention reduces the overall power consumption of clustering, increases the data compression rate, improves the compression effect, and at the same time, can further reduce the packet loss rate and improve the channel condition.
Owner:TONGJI UNIV

Car networking data transmission route selection optimized method based on electronic eyes

The invention relates to a car networking data transmission route selection optimized method based on electronic eyes. The car networking data transmission route selection optimized method comprises the following steps: (1) the electronic eyes collect traffic video images in real time; (2) a video processing module extracts traffic parameters according to the traffic video images; (3) a cloud computing platform affirms traffic flow state information according to the traffic parameters by combining the national road service level table; (4) a roadside unit broadcasts the traffic flow state information to car nodes, after each car node receives the traffic flow state information, the car nodes are adjusted in a self-adaptation mode and send the broadcast cycle of beacon news; (5) a car source node confirms crossroads where a data transmission route connected between the car source node and a car destination node may pass through according to an electronic map; and (6) the car source node selects the optimized route to send data according to the traffic flow information among the crossroads where the data transmission route may pass through. Compared with the prior art, the car networking data transmission route selection optimized method based on the electronic eyes has the advantages of being reliable in communication, high in promptness of data transmission, and the like.
Owner:TONGJI UNIV

Admission control method for determining priority of resource allocation and related device

The invention discloses an admission control method. The method comprises the following steps: receiving a request message for requesting admission of a service in the current admission control period; judging the type of service for admission which is requested by the request message; admitting non-real-time service of the request in case the type of the requested service for admission is of non-real-time service; determining admission priority of the requested real-time service in case the type of the requested service for admission is of real-time service; judging whether real-time serviceresources are available for the request based on the determined admission priority; and admitting the requested real-time service when a judgment result is that the real-time service resources are available for the request. Correspondingly, the invention further discloses an admission controller, a method for allocating resources for a real-time service and a device thereof, as well as a method for determining priority of resource allocation and a device thereof. The proposal can help meet various new requirements brought forward by next generation wireless communication system for admission control.
Owner:CHINA MOBILE COMM GRP CO LTD

Three-dimensional RIS-assisted coal mine communication and inductance integrated network optimization method and device

The invention provides a three-dimensional RIS-assisted coal mine communication and inductance integrated network optimization method and device, and relates to the field of communication technologies and coal mine safety detection. Comprising the steps that a coal mine communication network model with a three-dimensional intelligent surface is established, and the model comprises the three-dimensional intelligent surface, a user needing communication, a sensing area, a small portable sensing integrated base station and a ground data center; the method comprises two optimization algorithms: 1, optimizing a perception communication time distribution strategy in a coal mine communication network model; secondly, the reflection coefficient matrix of the three-dimensional intelligent surface is optimized; on the premise of ensuring basic communication requirements of a coal mine, coal mine safety information is sensed and detected more effectively; on the premise of real-time monitoring at the corresponding security level, more information can be sensed as much as possible; and the RIS phase shift matrix is optimized to improve the channel condition, so that the communication efficiency is maximized. When a dangerous accident such as a collapse event occurs in a coal mine, the RIS can obtain accident information according to the change of the sensing information so as to reduce the casualty probability.
Owner:SHANXI UNIV

Radar detection method and device assisted by programmable intelligent reflecting surface

The invention relates to a radar detection method and device assisted by a programmable intelligent reflecting surface. The method comprises: in a current period, according to a relative distance of each combination scheme and a prior probability of each combination result when each combination scheme is taken as a detection result in the current period, obtaining an optimization parameter of the current period, the optimization parameter comprising configuration of a transmitted waveform and a reflecting surface, the combination scheme comprising target directions where all detection targets are located, one detection target corresponding to one target direction in one combination scheme; obtaining an actual receiving signal of the current period based on the optimization parameter of the current period; and determining a detection result based on the number and direction of the detection targets under each combination scheme, the actual receiving signal of the current period and the actual receiving signals of all periods before the current period. According to the invention, the propagation channel between the radar antenna and the target can be optimized, the signal attenuation is reduced, and the radar detection performance is improved.
Owner:HANGZHOU FFEI TECH CO LTD

Method for lowering interruption probability of opportunity-distributed space-time coded cooperative communication network

The invention discloses a method for lowering the interruption probability of an opportunity-distributed space-time coded cooperative communication network. The method comprises the following steps: in the opportunity-distributed space-time coded cooperative communication network, selecting any user node as a determined user node and the other user nodes as alternative user nodes of the determined user node; enabling the determined user node and the other alternative user nodes to transmit information to each other, and respectively calculating the received signal to noise ratio from the determined user node to the other alternative user nodes and the received signal to noise ratio from the alternative user nodes to the determined user node; selecting an optimal companion of the determined user node according to the received signal to noise ratio and an optimal worst user selection method BWPS; enabling the determined user node and the optimal companion thereof to carry out data transmission with a base station (BS) through opportunity-distributed space-time coded cooperation respectively; and finally reaching the target of lowering the interruption probability of an opportunity-distributed space-time coded cooperative communication network.
Owner:SHANDONG UNIV

A method for reducing outage probability of opportunistic distributed space-time coding cooperative communication network

The invention discloses a method for lowering the interruption probability of an opportunity-distributed space-time coded cooperative communication network. The method comprises the following steps: in the opportunity-distributed space-time coded cooperative communication network, selecting any user node as a determined user node and the other user nodes as alternative user nodes of the determined user node; enabling the determined user node and the other alternative user nodes to transmit information to each other, and respectively calculating the received signal to noise ratio from the determined user node to the other alternative user nodes and the received signal to noise ratio from the alternative user nodes to the determined user node; selecting an optimal companion of the determined user node according to the received signal to noise ratio and an optimal worst user selection method BWPS; enabling the determined user node and the optimal companion thereof to carry out data transmission with a base station (BS) through opportunity-distributed space-time coded cooperation respectively; and finally reaching the target of lowering the interruption probability of an opportunity-distributed space-time coded cooperative communication network.
Owner:SHANDONG UNIV
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