159 results about "Capacity maximization" patented technology

Methods, systems, and apparatuses are presented for improved satellite communications. The satellite system may comprises at least one gateway, a satellite in orbit configured to communicate with the at least one gateway and provide a plurality of spot beams, and a plurality of subscriber terminals. The spot beams may include a first spot beam to illuminate a first region and a second spot beam to illuminate a second region adjacent to and overlapping with the first region. The first spot beam as sent to at least one subscriber terminal may be affected by (1) interference from other signal sources including the second spot beam at a signal-to-interference ratio C/I and (2) noise at a signal-to-noise ratio C/N. Reception of signals from the first spot beam by the at least one of the first plurality of subscriber terminals may be interference-dominated such that C/I is less than C/N.

Provided is a lane dynamic partitioning control method for an expressway intersection area. For the expressway intersection area, based on the actual traffic state, lanes of the intersection area are dynamically partitioned into intersection area lanes and non-intersection area lanes through signal indication signs. The intersection of the upper ramp traffic, the lower ramp traffic and the mainline traffic is achieved by means of the intersection lanes; the exclusive right of way is provided for the non-intersection traffic flow of an expressway mainline by the utilization of the non-intersection lanes. The control method comprises the two parts of the dynamic partitioning of the functions of the intersection area lanes and the control over the functions of the intersection area lanes, and the lane function dynamic partitioning model regards the overall through-out capacity maximization as a target, and determines the number of vehicles on the intersection lanes and the non-intersection lanes; the lane function control part comprises a control strategy implementation scheme, information publishing equipment arrangement and an isolation implementation method. The method can provide the exclusive right of way for the expressway mainline traffic in the intersection area, and reduce the interference to straight vehicles of the mainline by the intersection behavior, thereby improving the through-out capacity of the intersection area; under the condition that the vehicles line up and overflow at an off-ramp, the straight vehicles of the mainline can pass through normally, the vehicle average delay is reduced, and the bottleneck problem of the expressway weaving area is solved or relieved.

A network of nodes interconnected by links has content filtering specified at certain nodes, and routing of packet connections through the network is generated based on the specified content-filtering nodes. The network is specified via a content-filtering node placement method and a network-capacity maximization method so as to apply content filtering to packets for substantially all traffic (packet streams) carried by the network.

The invention discloses a downlink frequency spectrum resource distribution method with the D2D technology introduced in a cellular network. The method includes the following steps that (1) in the downlink time slot, an interference limited area (ILA) of cellular users is used for reducing the inference to the cellular users by D2D users, and thus the normal communication of the cellular users can be guaranteed; (2) frequency spectrum resources are distributed to D2D communication links by using the sum capacity maximization of cellular links and D2D links in the system as the target; (3) when different D2D links are distributed with the same frequency spectrum resource, and a heuristic optimization algorithm is used by a base station to conduct frequency spectrum resource redistribution on the D2D links distributed with the same frequency spectrum resource in order to avoid the interference between the D2D links.

Systems, methods and techniques are presented for discovering optimal solutions to satisfy communication traffic demands to a NGSO and GSO satellite constellations used for telecommunication. When multiple ground demands (mobile and stationary) are present, a satellite constellation requires an assignment of satellite resources to optimally match the ground demands. The systems, methods and techniques presented can utilize an optimization structure to maximize the objective function, using linear programming in combination with simulation and predictive features. The techniques presented determine optimal or quasi-optimal allocation of scarce and highly constrained satellite resources in an efficient manner. These techniques take into account maximizing capacity while protecting other geostationary and non-geostationary networks.

The invention provides a method for carrying out channel information feedback by using double codebook. The method comprises the following steps that: a signal receiver selects a grade-one optimal code word from codebook of a precoding matrix in the prior art; the signal receiver combines channel state information and a function formed by the grade-one optimal code word and selects a grade-two optimal code word from preset grade-two codebook according to a capacity maximum standard; the signal receiver generates feedback information comprising a code word index of the selected grade-one optimal code word and the code word index of the grade-two optimal code word and sends to a signal sender; the signal sender generates the precoding matrix which is a product of the grade-one optimal code word and the grade-two optimal code word according to the received feedback information. The invention also provides a system of carrying out the channel information feedback by using the double codebook. Compared to the channel information feedback method in the prior art, by using the method, the channel information can be fed back accurately.

The embodiments of the invention describe method and system for maximizing capacity of a distributed antenna system. A relaying antenna is selected to maximize a signal-to-leakage ratio (SLR) ratio of the distributed antenna system. Further, the capacity of the system is improved by allocating a signal power based on a pseudo-capacity criterion such that an average pseudo capacity of the distributed antenna system is maximized.

A high capacity, continuous production blast freezer includes an insulated enclosure and a plurality of adjustable product-carrying trolleys, individually moveable with the enclosure from an entrance location to an exit location. A heat exchanger in the form of an evaporator is provided in the enclosure. The mechanical equipment for the refrigeration system can be placed within the enclosure and separated from the freezing cell by a bulkhead. In one embodiment the enclosure is in the form of a container adapted to be transportable by ship, rail or truck. The arrangement of the heat exchanger or evaporator relative to the product carrying devices and the enclosure is designed to maximize the capacity of the heat exchanger and minimize frost formation, while providing for a maximum amount of product space within the enclosure to maximize throughput of the system.

The present invention provides a capacity maximization-based sparse code multiple access codebook design method. The method includes a first step of determining a codebook parameter S (J, K, F, M, N) of the sparse code multiple access (SCMA), wherein J represents a maximum quantity of users that the SCMA holds, F represents an SCMA mapping matrix generated based on resource blocks and users, K represents a quantity of the resource blocks, M represents a modulation order, and N represents a quantity of non-zero elements in each code word; a second step of constructing a one-dimensional constellation set S0, and calculating based on the one-dimensional constellation set S0 so as to obtain a one-dimensional complex constellation point set Sd; a third step of constructing an N-dimensional complex constellation set according to the one-dimensional complex constellation point set, and selecting an optimal combination sequence as a benchmark code word; and a fourth step of reranking code words of all users according to the benchmark code word, and allocating reranked code words to an indication matrix to generate an SCMA complex codebook. In design of a multi-user codebook, a superimposed coded modulation concept is introduced to improve system performance, and a power difference characteristic of an N-dimensional code word is maintained.

The invention discloses a joint optimization method of safety capacity and energy consumption in a wireless relay network, and relates to the field of wireless relay network cooperative communication. The method comprises the steps as follows: a safety capacity value from a source node to a destination node is restrained to be SCcon; a minimum energy consumption function of an interference node is obtained by using a beam forming technology according to the SCcon; a minimum energy consumption function of a relay node is obtained according to the SCcon; a minimum energy consumption function Dpower of a system is obtained; a minimum energy consumption value of the system is obtained at an extreme point of a minimum value of the Dpower, and the restrained safety capacity is released; and an efficiency function RSE of the system energy consumption is calculated. The invention provides a joint optimization strategy of the relay node and the interference node, and an accurate expression of equivalent safety capacity maximization corresponding to the unit energy consumption of the system is obtained, so that each part of energy reaches the maximal usage value, and the problem of balance between the safety and the energy efficiency in the wireless relay network under a single sniffing node is effectively solved.

The invention discloses a high speed train operation planning optimization method and system under the complex constraint condition. The high speed train operation planning optimization method includes that operation path drawing time is divided into a plurality of initial time modules; all the time modules are subjected to operation diagram structure optimization; the optimal operation diagram is output. The high speed train operation planning optimization system comprises a time module dividing device, an operation diagram structure optimization device and an output device. The high speed train operation planning optimization method and system achieve the win-win relation between two checking and balancing optimization objectives, namely traveling time minimization and transport capacity maximization, in the perspective of operation diagram structure optimization, and dynamically achieves reasonable operation diagram optimization.

The invention provides a channel allocation and power control method based on subscriber's QoS. The channel allocation and power control method comprises the following steps: constructing a system model based on capacity maximum of D2D subscribers, and selecting a candidate cellular subscriber set meeting requirements for the D2D subscribers according to the minimal signal-interference-noise ratio requirement of the D2D subscribers; optimizing the transmission power of cellular subscribers and the D2D subscribers according to the method of Lagrange multipliers under the premises of meeting QoS requirements of the cellular subscribers and limiting subscriber's power; and calculating capacities of all the D2D subscribers according to the optimal transmission power of the subscribers, and allocating a channel to a D2D subscriber whose capacity is the largest, so as to realize D2D communication in a cellular network. Through joint optimization of subscriber's channel allocation and power control, the channel allocation and power control method has the advantages that each subscriber is allocated with optimal transmission power, and the channel is allocated to the D2D subscriber whose capacity is the largest, so that the energy loss of the cellular subscribers and the D2D subscribers is reduced, and the total capacity of the D2D subscribers is improved.

The invention belongs to the field of communication anti-jamming technologies, relates to a spatial modulation technology, and particularly relates to a low-complexity large-scale antenna selection method based on spatial modulation so as to be used for solving a problem that the complexity is too high in performance optimal antenna selection in an MIMO (multiple input multiple output) system with the antenna scale being large. According to the invention, subset partition is carried out on an antenna set, antenna selection is carried out in each subset, and traversal search for constellation points and transmitting vector universal set is avoided. Meanwhile, weights of an included angle and the 2-norm of a vector are used to act as a measurement standard for selection, the performance is obviously better than that of a capacity maximization antenna selection method which purely considers the 2-norm, and good compromise between performance and complexity is acquired.

The invention relates to a shared method and system of an uplink frequency spectrum, aiming at the interference problem of a family base stations/macro-honeycomb base stations mixing network to carry out adaptability soft frequency reuse. In the method, a traditional soft frequency reuse method is adopted to confront the interference problem between macro-honeycomb cells, and the frequency interference problem between the family base stations/macro-honeycomb base stations is allocated and eliminated by using an orthorhombic spectrum. Simultaneously, an effective interference coordination mechanism is further provided for providing a complete solving scheme and facing the interference coordination problem between the family base stations; and facing the optimal utilization of spectrum at auser end, a spectrum scheduling method based on data packets is provided, wherein the service demands of a user in various aspects are comprehensively considered in the spectrum scheduling method forthe purpose of promoting the spectrum efficiency of the system and achieving the maximization of weighing volume of the user.

The invention relates to the field of electrical power systems, and discloses a method for calculating an inverse DG penetration level on the basis of particle swarm optimization in case of no changes on the relay protection setting value of the original power distribution network, for solving the influence on power grid protection after low-level multi-DG access. The method comprises the following specific steps of: establishing a DG equivalent calculation model with a low-voltage through capacity according to the control strategy of inverse DG at first; then establishing a calculation model for a fault current after the grid connection of the inverse DG; finally establishing an optimization model taking DG access level maximum as a target, and taking the three-section current setting value of each circuit as the penetration level of an inequality constraint condition, and evaluating DG access by virtue of particle swarm optimization.

The invention discloses a full duplex scrambling transmission method in an untrusted relay network, which is applied to a wireless communication system including three nodes of an information source, a relay and a destination node, and the relay is an untrusted relay. The method comprises the following steps: in a first time slot, transmitting information to the relay and the destination node by the information source, and receiving information source information by the destination node and transmitting an interference signal to the relay; in a second time slot, amplifying the signal received in the first time slot by the relay by adopting an amplify-and-forward protocol, after that, forwarding the signal to the destination node; performing self-interference cancellation by the destination node according to estimated channel information, and performing maximal-ratio combining on information received in the first time slot and the second time slot; and calculating the instantaneous security capacity of the system according to the received signal to noise of the relay in the first time slot and the received signal to noise of the destination node in the two time slots. The method of the invention can not only make the information source send the information to the destination node efficiently, but also make the destination node effectively interfere with the relay node to receive useful information, so as to maximize the security capacity of the system.

The invention discloses a battery cell, electronic equipment and a battery cell package method. The battery cell comprises a shell and a battery core, wherein the shell comprises a steel lower shell and a steel upper shell, insulation layers are arranged on surfaces of the upper shell and the lower shell, the lower shell and the upper shell are hermetically connected by welding to form a sealing cavity, a positive contact sheet and a negative contact sheet are arranged on the shell, the battery core is a laminated battery core, the laminated battery core is fixed in the sealing cavity, and a positive tab and a negative tab of the lamination battery core are respectively connected with the positive contact sheet and the negative contact sheet. The battery cell can be applied to the field ofthe electronic equipment; by matching of the steel shells and the lamination battery core, the battery core can be in various shapes and various sizes, various complicated installation spaces of theelectronic equipment can be adapted, so that maximum capacity of the battery cell is achieved; and the battery cell is high in strength of integral structure and is difficult to deform and get failure, and the battery cell is safe and reliable to use and can be repeatedly used after disassembly.

An efficient retransmission of data using symbol accumulation wherein the packet received in error is retransmitted at a lower energy-per-bit level concurrently in the same frame with the new packet. The destination device receives the data transmission and retransmission, demodulate the signal, and separates the received data into the new and retransmitted packet. The destination device then accumulates the energy of the retransmitted packet with the energy already accumulated for the packet received in error and decodes the accumulated packet. The accumulation of the additional energy provided by the subsequent retransmissions improves the probability of a correct decoding. The throughput rate can be improved since the packet received in error is retransmitted concurrently with the transmission of the new data packet. The capacity is maximized since the retransmission of the packet received in error is at a lower energy level than that of the new packet.

The invention relates to an urban electric vehicle charging network planning method considering multiple optimization targets simultaneously. According to the method, for multiple construction schemes of an electric vehicle charging network in a to-be-planned traffic system, a planning model considering two optimization targets of the charging service capacity and the distribution network loss is built for each construction scheme, the construction scheme of charging service capacity maximization and urban distribution network loss minimization is solved and obtained to serve as the optimal urban electric vehicle charging network planning scheme. Accordingly, two sub optimization targets in the model are subjected to fuzzification separately, and an original optimization model is converted into a single target optimization problem based on maximum satisfaction. At last, the urban electric vehicle charging network planning model is solved through a genetic algorithm based on real number encoding. By means of the method, the practical value of the planning model is guaranteed, the obtained optimization result is more reasonable and convincing.

The invention relates to an efficient logistics deployment system which comprises a logistics deployment platform, a plurality of freight information provision units connected with the logistics deployment platform by a network, a plurality of logistics execution units connected with the logistics deployment platform by the network and a plurality of terminal customers, wherein the logistics deployment platform collects freight information provided by the plurality of freight information provision units and selects the nearest logistics execution unit to the terminal customer to be delivered from the plurality of logistics execution units; and the logistics execution unit conveys goods to the terminal customer through a conveyance. The invention provides an integrated management platform for the logistics industry, can carry out computer integrated analysis processing on the freight information of the industry, selects a deployment scheme which maximizes charge capacity and minimizes material transfer process, and realizes optimization of logistics resources.