68results about How to "Improve broadcast efficiency" patented technology

The invention relates to the field of satellite navigation, and discloses a satellite navigation positioning enhancing system in an indoor environment. The system comprises a reference unit, a centralized satellite navigation signal simulator and N transmitting antennas, the reference unit and the centralized satellite navigation signal simulator are connected successively, and the N transmitting antennas are connected with the centralized satellite navigation signal simulator, and emit N regenerated satellite navigation signals synchronously. The invention also discloses a satellite navigation positioning enhancing method in the indoor environment. Satellite navigation signals in an indoor area are received instantly or reference signals are obtained via the Internet, and navigation signals synchronized with signals of a real satellite navigation system in the indoor area are generated and broadcast in real time indoor. Indoor satellite navigation positioning is realized without change of a navigation terminal. The system of the invention is low in construction difficulty, low in cost and general and supports GNSS systems.

The invention discloses a method and equipment for broadcasting to-do events, belonging to the technical field of communication. The method includes: obtaining the to-do event and the detection time period corresponding to the to-do event; within the detection time period, detecting the current state of the user; judging whether the user's current state satisfies a preset condition, and if the preset condition is met, broadcast the pending event. If the preset conditions are not met, the to-do event will not be broadcast. By detecting the current state of the user within the detection time period, and then judging whether the current state of the user meets the preset conditions, and broadcasting the to-do event when it is determined that the preset conditions are met, so that when the detection time period is reached, according to the current state of the user, such as the user To-do events are broadcast only when the user is in an active state or within a preset distance range, which improves the efficiency of broadcasting, avoids missing important matters when the user is in an emergency or other state, and improves user experience.

The present invention discloses a real-time on-demand data broadcast scheduling adaptive channel split and allocation system and method. The system consists of a server and multiple users and includes an uplink channel and a plurality of downlink channels. A bandwidth of the uplink channel is smaller than bandwidths of the downlink channels. When the user needs a piece of data, a request is uploaded to the server by using the uplink channel; after the request is uploaded, the user monitors the downlink channels to acquire the data; the server is used for maintaining one request queue (RQ), one pending queue (PQ) and a plurality of broadcast queues (BQ), wherein i is greater than or equal to 0 and is less than or equal to N; the RQ is responsible for collecting user requests, and the server acquires data from a database according to the RQ and generates the PQ; and the server periodically extracts data organization broadcast from the PQ. The channel is adjusted dynamically according to a real-time data request environment, so that the channel can effectively adapt to the broadcast environment in which hotspot data is scattered, hotspots change rapidly and data items change rapidly. The broadcast efficiency of a real-time on-demand data broadcast system is improved effectively.

The invention discloses a distributed file system directory quota method, system and device and a computer readable storage medium. The method comprises the steps of receiving a service processing instruction; judging whether the quota margin of a local directory meets the margin requirement for processing the service corresponding to the service processing instruction or not; if not, sending thequota application information to a metadata server; if yes, processing the service, and judging whether the accumulated quota usage amount of the local directory meets a preset reporting condition ornot during the last period for reporting of the quota margin of the local directory; if so, reporting the current quota margin of the local directory to the metadata server. According to the present invention, whether the quota margin of the local directory can meet the service processing requirement or not is actively judged before the service is processed, if not, the quota is applied to the metadata server, so that it is ensured that the situation that the quota is excessive after the service is processed is avoided, meanwhile, reporting is conducted only when the preset reporting conditionis met, the broadcasting frequency is reduced, and the broadcasting efficiency is improved.

The invention discloses an on-sea intermediate frequency digital broadcasting system, comprising: an information management sub-system used to collect and control various kinds of on-sea security information, to create the information files requiring to be transmitted, and to create the emission sequence according to the priorities and the repetitive requirement of the files; an offshore broadcasting and transmitting station to receive and convert the information files from the information management sub-system into an OFDM signal and broadcasting the RF signal to a ship through antenna radiations; and a ship mounted receiver to receive wireless electric signals, to modulate the OFDM signal, to re-create the information files, and according to the application classification of the information files, to display the information contents or provide the information files to a designated device. The information management sub-system and the offshore broadcasting and transmitting station are connected through an offshore network; the offshore broadcasting and transmitting station is connected with the ship mounted receiver through a wireless transmission channel. The on-sea intermediate frequency digital broadcasting system proposed by the invention is able to make the ship information system and the device connected in a seamless manner; and therefore, the broadcasting and transmitting efficiency is high; the coverage is wide and the requirement for broadcasting and transmitting various kinds of MSI data can be fulfilled.

The invention discloses a data broadcasting method based on the finite set network code ARQs and for large-scale receiving ends. The method comprises the following steps that (1) a base station broadcasts data packets; (2) the receiving ends conduct decoding and calculate the decoding gain of each preset network coding scheme according to the decoding satiations, and then the serial number of the scheme with the largest decoding gain is fed back; (3) the base station determines the network coding scheme adopted into the current retransmission by counting feedback information of the receiving ends. According to the data broadcasting method, the finite set network coding schemes need to be pre-set in the base station and at the receiving ends and the finite set network codes preset ARQs are introduced in broadcast communications, therefore, the amount of feedback information is reduced, the average number of retransmission times of the data packets is reduced, the broadcast communication efficiency is improved, and the problems that in an existing broadcast retransmission technology, the retransmission efficiency is low and the number of feedback information is too large under the condition that a large number of receiving ends exist are mainly solved.

The invention provides a low power consumption directional broadcasting method aiming at a wireless sensor network. The low power consumption directional broadcasting method comprises the following steps of: 1. initializing a network topology; 2. dividing a sector region; 3. determining a sensing radius; 4. broadcasting directionally; and 5. carrying out route discovery. The low power consumption directional broadcasting method adds a directional broadcasting idea into an AODV (Ad Hoc Ondemand Distance Vector) route discovering way in an original routing protocol, only aims at broadcasting partial nodes in the ruled sector region and performs packet loss treatment on the nodes outside the directional broadcasting sector, so that the energy of the sensor nodes subjected to the packet loss treatment can be stored for the next application; and multiple network performances of the wireless sensor network can be improved by analyzing a DB-AODV protocol through a simulation experiment.

The invention discloses an offshore high-frequency wireless chart updating system and method. The system comprises a broadcasting control terminal, a shore-based broadcasting station and a chart receiving terminal, wherein the broadcasting control terminal is connected to a data server; the shore-based broadcasting station is connected to a shore-based network; the broadcasting control terminal and the data server are both connected to the shore-based broadcasting station through the shore-based network; and the shore-based broadcasting station is connected to the chart receiving terminal through a wireless transmission channel. According to the system and the method, a chart file can be conveniently transmitted, the system and the method can be seamlessly connected to a ship information system and equipment, the broadcasting efficiency is high, and the coverage area is wide; electronic chart correction information is directly broadcast, and the middle link is reduced in a manner of often receiving the files on the ship, the workload of sailors is reduced, and the timeliness and the accuracy of chart correction are improved.

The invention discloses a composite message signal broadcasting method and device based on bipolar CSK modulation, and the method comprises the steps: carrying out the modulation of a basic message onan in-phase I branch, carrying out the BPSK-DSSS direct sequence spread spectrum of a serial data flow on the I branch after channel coding, and constructing an in-phase I branch baseband signal; modulating the extended message on an orthogonal Q branch, randomly taking one bit from an extended message modulation symbol after channel coding to form a serial data stream on the Q branch, forming aparallel data stream on the Q branch by other bits, carrying out BPSK-DSSS direct sequence spread spectrum on the serial data stream on the Q branch, and carrying out CSKDSSS direct sequence spread spectrum on the parallel data stream on the Q branch; wherein the two jointly construct an orthogonal Q-branch baseband signal; and carrying out carrier IQ quadrature modulation on the basic message baseband signal of the in-phase I branch and the extended message baseband signal of the quadrature Q branch to form a multi-rate composite message signal, and broadcasting the multi-rate composite message signal.

The invention discloses a task distribution and task delivery method, a device and a system and relates to the field of logistics storage. One specific embodiment of the task separate sowing method comprises the following steps: recommending a sowing position for an article to be separately sown so as to put the article to be separately sown on a separate sowing wall according to the sowing position; judging whether the shelving articles of the sub-sowing wall meet the type and quantity of target articles specified by the task or not, If so, binding the storage equipment identifier, the task identifier of the task and the corresponding sowing position; and determining the sowing position of the target article of the task bound to the current storage device in the sub-sowing wall, so as toput the to-be-sub-sown article of the corresponding sowing position into the current storage device according to the number specified by the bound task. According to the method, the to-be-separately-sown articles of the same type are put on the same sowing position of the separately-sowing wall, the storage equipment, the task and the sowing position are automatically bound subsequently, and thenthe target article is put into the storage equipment, so that the operation procedures are reduced, and the separately-sowing efficiency is improved.

The invention discloses a data broadcast ARQ method based on maximum-minimum network encoding. The method comprises the following steps: base stations broadcasting data packets; users decoding the data packets and feeding the correct decoding conditions of the data packets to the base station; the base stations performing maximum-minimum network encoding on lost original information to generate network encoding data packets and retransmitting the network encoding data packets, and the users feeding data packet conditions recovered at a retransmission stage back to the base stations; and repeating step 3) until all the users receive all the data packets correctly. The number of the network encoding packets formed by use of the maximum-minimum network encoding method provided by the invention is equal to the number of the lost data packets of the users losing the largest number of the data packets. Therefore, the maximum-minimum network encoding method can preferentially guarantee that the users losing the largest number of the data packets can obtain maximum network encoding gains. The method provided by the invention has the advantages of small average retransmission frequency, high broadcast efficiency and the like, thereby being able to be well applied to a wireless data broadcast scene.

The embodiment of the present invention discloses a directing method, including: obtaining guest information of a target studio, the guest information including the room identification number of the guest room; generating a director configuration file according to the guest information of the target studio; The broadcast guide configuration file is sent to the broadcast guide terminal, so that the broadcast guide terminal performs a broadcast guide operation based on the broadcast guide configuration file. The embodiment of the present invention generates the guide configuration file of the target studio by acquiring guest information, etc. Based on the guide configuration file, the guide operation can be performed in the guide terminal. The operation process is simple and the guide efficiency is high. Low-cost and pure software-based transition switching function. Moreover, it does not rely on the physical equipment, reducing equipment costs and labor costs.

The invention discloses a method for improving the broadcasting efficiency of CSNP messages in the IS-IS routing protocol. After the DIS in the broadcasting network is elected, the DIS itself sets a variable Time, which is initialized and cleared to zero; the variable Time is used to record the received representation The new LSP time of the network topology change; when the DIS receives the new LSP1 representing the network topology change at time X, it immediately updates its own LSP database and sets Time to the current time X; after a delay of 10 seconds, it sends the CSNP report message, and clear the Time; if within 10 seconds, the DIS does not receive a new LSP message, it will send a specific Hello message to all neighbors to maintain the connection relationship. The Hello message is used to indicate that the current network topology does not any changes. The method for improving the broadcasting efficiency of the CSNP message in the IS-IS routing protocol of the present invention has the advantages of reducing the number of times of sending the CSNP message, reducing the bandwidth occupation of the CSNP broadcast message, improving the broadcasting efficiency, and the like.