45results about How to "Guarantee the quality of data transmission" patented technology

The embodiment of the invention discloses a data transmission method and device, equipment and a storage medium. The method comprises: acquring an application data packet to be transmitted in a targetapplication; transmitting the application data packet to first routing equipment through a first network data channel, and transmitting the application data packet to a proxy server by the first routing equipment; meanwhile, transmitting the application data packet to second routing equipment through a second network data channel, and transmitting the application data packet to a proxy server through the second routing equipment, wherein the second network data channel is a short-distance wireless data channel, and the first network data channel is different from the second network data channel; finally, transmitting the application data packet to the application server based on the deduplication mechanism through the proxy server. According to the method, short-distance wireless data isused as an auxiliary channel for data transmission, so that the stability of data transmission between the terminal equipment and the application server is improved, and the air interface packet lossrate and the data delay are effectively reduced.

The invention relates to the field of data transmission, in particular to a wireless automatic meter reading system which comprises a sensor, a data collector and a management center, wherein the sensor is used for obtaining data of a meter and transmitting the obtained data through a wireless Mesh network; the data collector is used for receiving the data transmitted by the sensor and transmitting the received data; and the management center comprises a first control unit, and the first control unit is used for receiving the data transmitted by the data collector and recording the data. The invention further provides a wireless automatic meter reading method. The wireless Mesh network in a ZigBee wireless network is utilized for carrying out communication in a domestic specific free frequency band, thereby saving the cost of the network. The wireless automatic meter reading method does not need to lay lines in advance, thereby having small workload and realizing portability. Furthermore, a topological structure of the wireless Mesh network can be built independently, thereby being applicable to information collection of a variety of small-range geographic regions and having a wide range of applications. The data transmission path is short, thereby ensuring the data transmission quality.

The invention provides a video file scheduling distribution method and system. The method comprises: determining a video file ID according to a video file access request of a request terminal; selecting a plurality of service nodes storing a video file based on the video file ID; obtaining current available bandwidth information of selected service nodes; and feeding the address information of selected service nodes and the current available bandwidth information of selected service nodes back to the request terminal to be used for providing video file segmented transmission service for the request terminal through the plurality of service nodes. The invention also provides a video file request method and system. According to the invention, the request terminal is in connection with each of the plurality of service nodes to successively obtain segmented data in a video file, thereby reducing hardware setting configuration capital investment, reducing server loads and bandwidth data, and maintaining stable data transmission and data transmission quality.

The invention provides an electronic tag reading and writing system based on a multiple connection modes. The electronic tag reading and writing system comprises a reading and writing terminal, a remote server and a mobile terminal. The reading and writing terminal is composed of a WIFI communication module, a Bluetooth module, a USB interface module, an electronic tag reader-writer, a microcontroller and a data storage module, the reading and writing terminal is in communication with a control center through the WIFI communication module or the Bluetooth module or the USB connecting module and is in communication with the mobile terminal through the WIFI communication module or the Bluetooth module or the USB interface module. The invention further provides a reading and writing method based on the system, the reading and writing functions of an electronic tag and the anti-crosstalk function among a plurality of non-contact type electronic tags within the reading and writing range are achieved. The system and method overcome the distance limitation on different management objects in the Internet of Things, meanwhile, a display screen and a keyboard at the reading and writing terminal are omitted, data can be input and displayed through the keyboard and screen resources of the mobile terminal, and therefore the system cost can be greatly reduced.

The invention discloses a method and device for adjusting a spreading factor in a wide area Internet of Things, and relates to the technical field of Internet of Things communications for dynamicallyadjusting the spreading factor according to the current network environment, thereby reducing service delay and increasing service life of terminal batteries. The method comprises the following steps:setting the value of the spreading factor to a first preset initial value before transmitting the service; before transmitting the ith service, acquiring a signal-to-noise ratio SNR of the i-1th service and a SNR of the i-2th service reported by the terminal, and the current value of the spreading factor; determining the value of the spreading factor in the ith service according to the differencebetween the SNR of the i-1th service and the SNR of the i-2th service, and the current value of the spreading factor, wherein the value of i is an integer greater than or equal to 2; and sending thevalue of the spreading factor in the ith service to the terminal and the gateway to enable the terminal and the gateway to adjust the current value of the spreading factor to the value of the spreading factor in the ith service.

The embodiments of the present application disclose a data transmission method, device, device, and storage medium. The method includes: acquiring an application data packet to be transmitted in a target application; and transmitting the application data packet to a first router through a first network data channel device, and the first routing device transmits the application data packet to the proxy server; at the same time, the application data packet is transmitted to the second routing device through the second network data channel, and the application data packet is transmitted by the second routing device. The packet is transmitted to the proxy server; the second network data channel is a short-distance wireless data channel, and the first network data channel is different from the second network data channel; finally, the application data packet is transmitted to the application server through the proxy server based on the deduplication mechanism. The method uses short-distance wireless data as an auxiliary channel for data transmission, improves the stability of data transmission between the terminal device and the application server, and effectively reduces the air interface packet loss rate and data delay.

The invention discloses a radio transmission power control method and a radio transmission power control device. The method comprises the following steps of acquiring radio transmitting power Pti, radio receiving power Pri, interference signal power Iti of a transmitting end, interference signal power Iri of a receiving end and a standard deviation J of shadow fading at the moment ti; obtaining asignal interference ratio Wti of the sending end and a signal interference ratio Wri of the receiving end according to Pti, Pri, Iti, Iri and J; respectively comparing the Wti and the Wri with the signal-to-interference ratio gate limit u; if Wti or / and Wri is / are smaller than u, adjusting the current radio transmitting power of the wireless access point AP, so that the signal interference ratio of the transmitting end to the receiving end is not smaller than u; judging whether the adjusted radio transmitting power Pti'is greater than the minimum power received by other STAs in the current local area network or not, and if so, taking the Pti 'as the radio transmitting power in the transmission time slot of the ti moment by the wireless access point AP; and if not, keeping the radio transmitting power of the wireless access point AP unchanged. According to the invention, radio transmission power self-adaptive control is realized.

The invention discloses a method and system for load balancing control in a wireless ad hoc network system. The method includes: setting the management frequency point as the second receiving frequency point when the opening duration of the management frequency point is longer than the set threshold; setting the second device Register under the first receiving frequency point and the second receiving frequency point of the first device; obtain the first number and the second number of the second device mounted under the two service frequency points, and when the first preset condition is met Switch the service frequency points connected by the first set number of second devices; obtain the third number and the fourth number of the second devices mounted under the two service frequency points whose communication quality is less than the second set threshold, and meet the The second preset condition is to switch service frequencies connected by a second set number of second devices. The present invention can monitor and dynamically adjust the load quantity under two service frequency points in real time to ensure the quality of data transmission; the management frequency point of the LoRa base station that multiplexes the outdoor unit is the service frequency point, which reduces the waste of frequency point resources.

The invention relates to a cross-layer ARQ (Automatic Repeat Request) method in an LTE-WLAN (Long Term Evolution and Wireless Local Area Network) heterogeneous wireless network system. The cross-layer ARQ method comprises the steps of: respectively adding a virtual network interface card between a terminal of the LTE-WLAN heterogeneous wireless network system and a DLL (Data Link Layer) as well as a network layer of a gateway to virtualize a fixed IP (Internet Protocol) for an application layer at the upper side and shield influences from different physical links of a bottom layer at the lower side; and realizing an ARQ protocol on an IP layer by utilizing a closed loop feedback system. The cross-layer ARQ protocol provided by the invention solves the problems of data packet loss or disordered arrival caused by switching of the terminal in an LTE-WLAN heterogeneous wireless network environment efficiently, prevents the TCP link from entering into a congestion control state and performing a rapid recovery or slow start process to affect the link transmission performance seriously due to the loss or disorder of the data packet. The cross-layer ARQ method in the LTE-WLAN heterogeneous wireless network system, disclosed by the invention, has the advantages of well guaranteeing quality of data transmission between the terminal of the heterogeneous network system and the gateway, providing the transmission layer with reliable services and enabling a terminal user to obtain high-speed and smooth communication experience in the heterogeneous wireless network environment.

The invention provides a data transmission quality management and control system and method. The system operates in a wireless access node. The wireless access node is connected with a transmitting end and a receiving end through a wireless network. The system detects the load type of currently transmitted data flow and current transmission parameters and judges whether the current transmission parameters are greater than or equal to standard transmission parameters. When the current transmission parameters are greater than or equal to the standard transmission parameters, the wireless access node continuously receives the data flow transmitted by the transmitting end or transmits the data flow to the receiving end. When the current transmission parameters are less than the standard transmission parameters of the receiving end, a message indicating failure of data flow transmission and a message indicating improving the transmission quality are transmitted to the receiving end.

Disclosed are a method for eliminating cell interference, a network equipment and a storage medium. The method of a first core network equipment comprises the steps of receiving first information reported by a first base station; the first information comprises a neighbor cell measurement result of a terminal accessed to the first base station, uplink background noise of the first base station and a frequency range needing to be guaranteed; determining at least one neighbor cell from neighbor cells contained in the neighbor cell measurement result based on the uplink bottom noise and the neighbor cell measurement result; issuing the frequency range to at least one second base station to which the at least one neighbor cell belongs; wherein the issued frequency range is used for each second base station in the at least one second base station to perform access restriction in the frequency range.

The invention discloses a method and device for adjusting a spreading factor in a wide area Internet of Things, and relates to the technical field of Internet of Things communications for dynamicallyadjusting the spreading factor according to the current network environment, thereby reducing service delay and increasing service life of terminal batteries. The method comprises the following steps:setting the value of the spreading factor to a first preset initial value before transmitting the service; before transmitting the ith service, acquiring a signal-to-noise ratio SNR of the i-1th service and a SNR of the i-2th service reported by the terminal, and the current value of the spreading factor; determining the value of the spreading factor in the ith service according to the differencebetween the SNR of the i-1th service and the SNR of the i-2th service, and the current value of the spreading factor, wherein the value of i is an integer greater than or equal to 2; and sending thevalue of the spreading factor in the ith service to the terminal and the gateway to enable the terminal and the gateway to adjust the current value of the spreading factor to the value of the spreading factor in the ith service.

A Genetic Algorithm Based Cognitive Radio Interference Suppression Method. The main purpose is to solve the problem that the existing cognitive radio spectrum pool multi-user interference suppression method cannot guarantee the data transmission quality of cognitive users. It is characterized in that: the method first sets the cognitive user data transmission rate threshold, calculates the maskable carrier sequence length according to the threshold value, randomly selects a carrier set from the cognitive user subcarriers as the primary sequence, and then passes The fitness function selects a better intermediate carrier sequence, and then uses cross mutation to generate a new carrier sequence, and continuously adjusts the fitness function to generate a new intermediate carrier sequence until the fitness reaches the set threshold, and the iterative process of the genetic algorithm converges. The optimal interference subcarrier sequence is obtained, the optimal interference subcarrier sequence is shielded, and cognitive radio interference suppression is realized.

The present invention provides a method and device for message forwarding, which are applied to network devices. The method includes: after the client device sends a DNS request message to the DNS server, receiving the DNS response message sent by the DNS server to the client device. text; after the resolved domain name is resolved from the DNS response message, it is judged whether the resolved domain name matches the preset domain name characteristics; if it matches, the A record address corresponding to the resolved domain name is resolved from the DNS response message; The corresponding relationship between the next-hop address of the link pre-configured for the resolved domain name and the A record address is updated to the routing table; when receiving the service message sent by the client device, query the routing table for forwarding. By applying the embodiment of the present invention, a specific domain name access can be carried by a pre-configured link, thereby ensuring the smoothness and reliability of the domain name access of a specific network service in the case of tight bandwidth and a surge in business, thereby ensuring the quality of its data transmission , improve user experience.