8 results about "Cellular network" patented technology

The invention provides a technical scheme applied in a cellular network of mobile communication, which applies a device-to-device (D2D) technology in the cellular network, and allows D2D user pairs to multiplex resources of cellular network users for communication. The invention provides a method based on base station positioning to select the cellular users for the D2D user pairs for multiplexing resources and selects the cellular user having the farthest distance away from each pair of D2D users to carry out resource multiplexing. In the scheme provided by the invention, the complexity of an algorithm through which a base station end selects the cellular users for resource multiplexing is simplified, and the interference between the D2D user pairs for multiplexing resources and the cellular users is reduced to be lowest, so that the whole frequency spectrum efficiency of the system is improved. In addition, for the method, the practical operability is very strong, the implementation is easy in practice, and the application modes are more flexible.

A method for MIMO wireless communication comprises the steps of generating inner and outer codes based on channel state information available at a transmitter and concatenating different inner codes with different outer codes; and using the generated concatenated inner and outer codes for wireless communication. The inner and outer codes are based on channel phase information at the transmitter or channel feedback. High-performance trellis codes or block codes for use in cellular networks are illustratively described. The space-time trellis codes are generated by set partitioning on a plurality of classes of signal designs to generate a series of inner codes, each of the series of inner codes being optimized by channel phase feedback, and concatenating each inner code with a multiple trellis coded modulated outer code to provide a complete space-time trellis code as a cophase space-time trellis code.

An apparatus (213) and corresponding methods (FIG. 7) to facilitate maintaining crypto synchronization while processing communication signals in a communication unit includes a vocoder (215) configured to convert input audio band signals to vocoder output frames; a crypto processor (217) configured to encrypt the vocoder output frames to provide encrypted output frames; and a synchronizer (219) configured to substitute in a predetermined manner synchronization information corresponding to an encryption state of the crypto processor for a portion of the encrypted data in a portion of the encrypted output frames to provide resultant output synchronization frames suitable for synchronizing a decryption process at a target communication unit.

The invention provides an interference blocking scheme switching method for millimeter wave cellular network uplink secure transmission. The interference blocking scheme switching method specificallycomprises the following steps: the step 1, taking an optimal cooperative user in K-1 cooperative users to carry out interference blocking and taking full duplex interference blocking of a base stationas an interference blocking scheme respectively; the step 2, calculating the safety throughput of a communication link when the K-1 cooperative users in the step 1 interfere, and taking the cooperative user corresponding to the maximum safety throughput as an interference node of an interference blocking scheme, meanwhile, calculating the safety throughput during full duplex interference of the base station in the step 1; and the step 3, comparing the communication link security throughput obtained in the step 2 with the communication link throughput when the base station interferes, and taking the interference blocking scheme corresponding to the maximum security throughput as the interference blocking scheme of the current time slot; According to the invention, the safety throughput istaken as an evaluation index, and the user position information is utilized to efficiently and flexibly switch between the two interference blocking schemes, so that the system always works in an environment with the optimal safety throughput.

The invention relates to a method for realizing remote management and preservation of leased assets based on internet of things application technology in combination with software services, which comprises the following steps: 1) a monitoring terminal is provided, the monitoring terminal is connected with the leased assets, and operation information of a numerical control device is acquired; 2) the monitoring terminal sends the acquired data to a data acquisition end in batches, and the data acquisition end integrates the information and stores the information to a server or an acquisition cloud; 3) a financing lease management platform is applied, the server or the acquisition cloud is connected through a cellular network so as to read the data or the state of the numerical control device; 4) a worker logs in the internet of things platform through a control client and provides a data viewing request, so that effective monitoring of the leased assets is realized and the controllability of the lease is achieved; the server or the acquisition cloud displays the data of the corresponding numerical control device on a display page of the financing lease management platform. Accordingto the method, various solutions of asset management, after-sales management, security management, credit management, service management, production management and the like can be effectively provided.

An air traffic control system includes one or more servers each including a network interface, a processor, and memory; and a database communicatively coupled to the one or more servers, wherein the network interface in each of the one or more servers is communicatively coupled to one or more passenger drones via a plurality of wireless networks at least one of which comprises a cellular network; wherein the one or more servers are configured to obtain operational data from a passenger drone, obtain conditions from one or more of the operational data and the database, determine a future flight plan based on the operational data and a flying lane assignment for the passenger drone, determine potential collisions in the future flight plan based on static obstructions and dynamic obstructions, obtained from the database based on the future flight plan, and provide evasive maneuver instructions to the passenger drone.

The invention discloses a performance index prediction method for data access process in intelligent monitoring application, which comprises the following steps: S1) acquiring the number of communication nodes which initiate access requests in each frame according to a probability density function based on a Beta distribution model; S2) calculating the collision probability of the communication nodes which initiate the access requests in each frame through a total probability formula on the basis of the number of random access channels configured in each frame; S3) acquiring the average successful access probability of access nodes according to the number and the collision probability of the communication nodes which initiate the access requests in each frame; and S4) acquiring the average access delay of the communication nodes on the basis of a queuing model which considers the impacts of the collision of the communication nodes and a preset nodes-per-batch distribution model. By using a predication model for predicting key performance indexes, a guide foundation is provided for honeycomb-network-based intelligent monitoring service which is to be widely used in future and an improvement approach is provided for algorithm optimization.

The invention belongs to the technical field of Internet-of-vehicles long-distance wireless communication, and discloses an intelligent networked vehicle seamless communication method based on a virtual mobile honeycomb. According to the method, a virtual mobile cellular is constructed by utilizing the computing power of a cellular network edge base station to provide seamless communication connection capacity for network connection vehicles. A cellular base station covered by a whole-course road section is constructed into a virtual mobile cellular by applying a software-defined network method, a communication configuration file matched with a service is generated when a networked vehicle is accessed to a first base station, and the communication configuration file is sequentially transmitted to neighbor base stations in the virtual mobile cellular. And when the networked vehicle needs handover, seamless communication is realized by only enabling the stored neighbor base station communication configuration file. The method has the advantages that the communication overhead between the networked vehicle and the base station is exchanged by utilizing the computing power and the communication overhead of the cellular network base station, so that the wireless spectrum efficiency in the Internet-of-vehicles and the connectivity of high-speed movement handover are improved.