186 results about "Bandwidth distribution" patented technology

A data transmission device 10 serving as a traffic distribution control device is a device which, in order to distribute traffic across a plurality of physical ports composing a logical port for link aggregation, uses a hash function to calculate a hash value from a destination address and a source address of a receive packet, and determines a destination physical port. The traffic distribution control device includes a measuring unit 13 that measures an output flow rate of a packet outputted from each of the plurality of physical ports; a calculating unit 14 that calculates a flow rate ratio between the plurality of physical ports with respect to the measured output flow rates; and a first control unit 12 that feeds the calculated flow rate ratio back to a bandwidth distribution ratio between the plurality of physical ports to change numerical allocation of hash values for determining the destination physical port.

A method and apparatus of accessing a channel in a wireless communication system is provided. The method includes receiving a first frame including configuration information on a channel allocated from a bandwidth including a primary channel, a secondary channel and an extension channel from an access point (AP), and transmitting a second frame to the AP by using the allocated channel. The configuration information includes an extension channel off-set element field that sets the extension channel as the offset of the primary channel.

The invention discloses a method of an extensible OFDM and OFDMA bandwidth distribution, which has the advantages of improved spectrum efficiency and enhanced flexibility and adaptability owing to the extensible single or multi-carrier bandwidth distribution characteristics. The invention also discloses a transmitter and a system of the spectrum bandwidth distribution in the OFDM and OFDMA system. The protection of the band and the sub-carrier can be reduced or deleted so as to improve the spectrum efficiency and the invention has bandwidth expandability.

The embodiment of the invention provides a network bandwidth distribution method and a terminal. The method comprises the following steps of: obtaining a priority level of an application program which is being operated by the terminal and occupies a network resource; obtaining a current available network bandwidth of the terminal; and distributing the current available network bandwidth to the application program according to a network bandwidth distribution policy of the terminal and the priority level of the application program. According to the network bandwidth distribution method and the terminal disclosed by the embodiment of the invention, the network bandwidth is reasonably distributed for the application program being operated by the terminal according to user requirements.

The invention discloses a method of dynamic bandwidth adjustment in bandwidth access system, which includes the following steps: the bandwidth access equipment is allocated and stored with business information; the bandwidth access equipment monitors and identifies the business information of users' choice in the data packet dispatched; according to the identified business information, the bandwidth access information increases or releases the bandwidth of corresponding users. The invention reduces the update and storage steps of resources reservation soft state, with easier realization. At the same time, the dynamic bandwidth distribution method adopted by the invention can meet the dynamic requirements of users random usage, distribute system bandwidth reasonably to the maximum degree and guarantee the experience quality and service quality of the business used by users.

The present invention extends to methods, systems, and computer program products for controlling the transfer of terminal server data. In some embodiments, contending request to send terminal server data are resolved by a flow control module situated between a terminal server protocol and a transport/network protocol. The flow control module utilizes channel priorities along with amounts of previously sent data per channel to determine how to distribute bandwidth in a relatively controlled manner between contending channels. The flow control module can be configured to intercept communication between terminal server protocol and a transport/network protocol to facilitate bandwidth distribution. In other embodiments, data is simultaneously sent over multiple channels of terminal server connection. A first write operation obtains a lock on a corresponding channel but the channel lock does not prevent write operations on other channels.

The invention discloses an active queue scheduling method based on QoS (Quality of Service) in a differentiated service network, comprising the following steps of: classifying businesses of a coming business grouping by a classifier according to a DSCP (Differentiated Services Code Point) domain thereof, partitioning all classified business kinds to be a real-time business kind aggregate and a non-real-time business kind aggregate; grouping and scheduling the business kind grouping of the non-real-time business kind aggregate and the real-time business kind aggregate through a self-adapting weighting polling scheduler respectively; and scheduling the scheduling groupings output by the two schedulers through a strict PQ (Priority Queuing) scheduler. The invention can not only provide dynamic band width distribution according to the practical load situation of nodes, but also efficiently ensures the time delay requirements on a real-time business.

The invention discloses an unmanned aerial vehicle base station bandwidth and track joint optimization method with limited pushing power. The method is suitable for an unmanned aerial vehicle emergency communication scene. According to the invention, a single unmanned aerial vehicle is used as an air base station; in a scene of providing downlink transmission services for a plurality of users in aprocess of flying from a starting point to a terminal point, under the condition that the pushing power and the flight time of the unmanned aerial vehicle are limited; the minimum average rate of each user in the system is maximized by adjusting the flight path and the user bandwidth distribution; a non-convex optimization problem is established according to the moving position of the unmanned aerial vehicle, the pushing power and the bandwidth constraint, and the non-convex optimization problem is converted and solved by using a block coordinate descent and continuous convex approximation method, so that the minimum average rate of each user in the system is maximized, and the energy and frequency band resource utilization rate is maximized. The method has important guiding significancefor the unmanned aerial vehicle communication system under the condition that the pushing power and the total bandwidth are limited.

The invention discloses a service node selecting, updating and code rate adaptation method in a distributed DASH system, and the method comprises the steps: requesting for the downloading of a first video segment from all candidate Web content servers, and sorting the server nodes according to an available network bandwidth; selecting the Web content server with the maximum available bandwidth asa service node of a data segmenting request; employing an additive-increase and multiplicative-decrease TCP-like slow start code rate selection method for dynamically obtaining the video segment froma plurality of Web content servers of the distributed DASH system, thereby effectively using the characteristics of the diversified service nodes in the distributed DASH system, and reducing the number of unnecessary buffering times in the play process while reducing the play start time delay. The method employs the service node and code rate selection method based on probability, and achieves thebalance among the fairness and smoothness of paly and the size change smoothness of a buffering region. Meanwhile, the method effectively solves a problem of unfair distribution of bandwidth caused by a condition that a plurality of video streams share the bandwidth in a fixed period scheduling strategy.

The invention relates to a dynamic adjusting method for a bandwidth. The method comprises: network flows of all users are monitored periodically and bandwidth utilization rates of all users are calculated according to the monitored network flows; when the bandwidth utilization rate of certain user is larger than a first threshold value, the bandwidth of the user is increased, and when the bandwidth utilization rate of the user is less than a second threshold value, the bandwidth of the user is reduced, wherein the first threshold value is larger than the second threshold value. With the method, the equitable bandwidth distribution is guaranteed and the bandwidth utilization rate is improved.

The invention provides a multipath parallel and reliable transmission method applicable to a satellite network, and aims to improve the reliability of parallel transmission of a high-bandwidth data stream under a satellite network environment. According to the method, the concept of redundant transmission is mainly introduced into the parallel transmission, so that the problem that the parallel transmission of the high-bandwidth data stream is low in reliability is solved; furthermore, by combination of the specific condition of the satellite network, a method for reducing the influence of the redundant transmission on the load of the whole network is provided. According to a multipath bandwidth distribution scheme, an optimization math model is used for meeting the requirements that the parallel transmission of high-bandwidth data is used as a constraint condition and the reliability of the multipath transmission is used as an optimizing target, so that the effect of finishing the most reliable parallel transmission by only using finite multiple paths can be finally achieved.

The embodiment of the invention discloses a network bandwidth regulation method and device, and relates to the communication field. The objective of the invention is to automatically monitor whether the bandwidth distribution is reasonable or not. The device comprises: an IP address query module configured to inquire the IP address of the online terminal equipment (UE) in a query local area network; a bandwidth monitoring module configured to monitor the occupied real network bandwidth of the online UE for some time; a bandwidth regulation module configured to employ a presetting bandwidth regulation strategy and regulate the network bandwidth of the online UE; and a bandwidth automatic regulation management module configured to operate the IP address query module to obtain the IP address of the online UE after starting and send the IP address of the online UE to the bandwidth monitoring module, wherein if the condition that the smoothness of the real network bandwidth occupied in the first UE is smaller than or equal to a first threshold is existed in the N online UE, the bandwidth regulation module is operated, and N is not less than 2.

The invention provides an optimal bandwidth distribution demand method and device. The method comprises the following steps: when a displayer is started, a local network multicast set is added through a transmission control terminal; the local network multicast set is utilized to inquire whether resource nodes in the local network contain audio and video documents needing to be demanded or not; and the internal network connection with the resource nodes provided with the audio and video documents in the local network is preferentially established to carry out the demand. According to the invention, when a user demands, the multicasting technology can be used for downloading audio and video documents preferentially from the resource nodes of the local network; and because the data transmission rate in the local network is greatly higher than the rate of the external network, the demand speed of the user is increased, and the occupation of the bandwidth of the routing exit is further decreased.

The invention discloses a flow control method and device, and relates to the technical field of communication. Dynamic flow control can be more flexibly achieved according to a real-time link condition, the utilization rate of bandwidths is increased, and waste of the bandwidths is reduced. The flow control method includes the steps that a plurality of adjustable flow control policies with different priorities are set; dynamic flow control lists are periodically generated, and dynamic flow control is conducted according to the newest dynamic flow control list, wherein the process for generating the dynamic flow control list each time includes the steps that an empty dynamic flow control list is generated, if it is judged that flow control is not conducted on a current link, blockage can be generated, at least one adjustable flow control policy is added to the dynamic flow control list according to a low-to-high priority sequence until the link is not blocked when dynamic flow control is conducted according to the current dynamic flow control list, and available surplus bandwidths are distributed to data flow corresponding to the adjustable flow control policy with the highest priority in the current dynamic flow control list.

The invention provides a resource dispatching method and a system based on a wireless system, applied to a multi-hop network, and the specific realization method is: a bandwidth is given to MS by a mobile terminal MS synchronous station, and data are transmitted to the synchronous station of MS through the acquired bandwidth by MS; data is transmitted to an upper node through the bandwidth given by the upper node from each level of nodes between MS and MMR-BS supporting a mobile multi-hop relay station, after a bandwidth given by the upper node is acquired between a lower node given by the bandwidth and the data received from the lower node and data of the lower node are received. The invention has the advantages that the application of the scheme can assure the acquirement of the bandwidth before receiving the transmitted data from the lower node; the space between the acquired bandwidth and the received transmission data is relatively small; not only can the whole data transmission time be effectively compressed, but also the distributed bandwidth is in line with the real-time condition of a link of the network; a problem of disabled bandwidth distribution can be effectively avoided.

An embodiment of the invention provides a multi-link aggregated link bandwidth distribution method and apparatus applied to a mobile network. Information of an operator base station connected with all links, theoretical bandwidth information of all links, mobile device position information and signal intensity information of base station signals received by a mobile device at current time in an aggregated link are obtained; according to the obtained position information and the obtained signal intensity information, bandwidth floating ratios of all the links in a next time interval are calculated; according to the bandwidth floating ratios and the theoretical bandwidth information, link bandwidth predicted values in the next time interval are obtained, and data transmission bandwidth distribution between the mobile terminal and the base stations in the next time interval is conducted according to the bandwidth predicted values of all the links. Link aggregation load balancing in the Mobile Internet can be achieved, and good link aggregation effects are exerted in the Mobile Internet.

The invention belongs to the technical field of passive optical network (PON) system, in particular relates to an orthogonal frequency division multiplexing (OFDM) multi-sideband multi-subcarrier distribution technology based PON system. An OFDM signal is adopted in transmission of uplink and downlink of the system, and three-layer bandwidth distribution based on signal optical domain multiple sidebands, electric domain OFDM subcarrier and time slot can be realized. In the PON system, an optical line terminal firstly generates an optical source of N sidebands, data is modulated onto M specified downlink sidebands in OFDM form, the other N-M sidebands are distributed to a plurality of optical network units, so as to transmit OFDM signal of uplink data, and no additional local optical source is required. The system of the invention has high band utilization ratio and good signal distribution flexibility.

The invention provides an Ethernet passive optical network bandwidth distribution method based on bandwidth borrowing, comprising: OLT receives a bandwidth distribution request reported by the ONU and distributes the bandwidth according the load of the ONU. Therefore, by borrowing the bandwidth to the heavy load ONU through the light load ONU or by withdrawing the borrowed bandwidth through the heavy load ONU to satisfy the bandwidth authorization of every ONU that every ONU fairly receives the bandwidth authorization is realized.

The embodiment of the invention provides a dispersion compensation adjustment method, a device and a system thereof. The dispersion compensation adjustment method comprises the following steps: determining the dispersion compensation dosage of an optical network unit (ONU) by up-link transmission delay; acquiring DBA distribution results, wherein, the DBA distribution results comprise bandwidth distribution results of the ONU of next frame; and finally carrying out dispersion compensation in accordance with the DBA distribution results and the dispersion compensation dosage. The method, the device and the system of the embodiment of the invention can optimize the dispersion compensation or the dispersion pre-compensation effect of an OLT end or an ONU end and improve the up-link or down-link receiving performance.

An IP distributed bandwidth process method relating to electric communication technology is to carry out a certain access control to every nexus on the IP ring applying dual-ring topological structure, a flow control packet controls data transfer according to congestion nexus information on IP ring and its situated relative position to finish the flow control on each nexus by fair algorithm with weight to transfer flow information mutually, solving the problem of line head blocking

The embodiment of the invention provides an information acquisition method and a device thereof, and relates to the field of electronic information technology. According to the invention, the problem that bandwidth distribution and utilization conditions of each electric terminal in a CDN network cannot be acquired is solved; users can actually adjust network planning of a CDN server according to actual bandwidth distribution and utilization conditions; and it is convenient for later maintenance of bandwidth. Meanwhile, work efficiency of the server can be raised. The method specifically contains the following steps: the server acquires log files of the electric terminals; bandwidth data of the electric terminals in the log files are acquired; according to the bandwidth data of the electric terminals, different log files corresponding to the bandwidth data and log data in the log files are acquired so as to obtain a log data set; and the obtained log data in the log data set is analyzed, and bandwidth distribution and utilization conditions of the electric terminals are determined. The method provided by the invention is applied in acquisition of bandwidth distribution and utilization conditions.

The invention provides an SDN (Software Defined Networking) based IEC 61850 communication oriented dynamic bandwidth distribution method. The SDN based IEC 61850 communication oriented dynamic bandwidth distribution method comprises a first step of performing hierarchical modeling for an SDN controller based on an IEC 61850 standard; a second step of mapping a network service in the SDN controller into an ACSI (Abstract Communication Service Interfaces) service; a third step of building a communication protocol stack structure of IEC 61850 based transformer substation IED (Intelligence Electric Devices), the SDN controller of the IEC 61850 standard and a switch of OpenFlow; and a fourth step of, by the SDN controller, controlling an infrastructure to distribute a corresponding bandwidth for each transformer substation IED through a network, and monitoring the bandwidth distribution condition. The SDN based IEC 61850 communication oriented dynamic bandwidth distribution method makes up the defect on a network sensing function of a smart grid automatic management system, distributes network bandwidth resources dynamically and in real time for flow with different priorities and guarantees the best delivery performance in an end-to-end communication process of the transformer substation.

The invention relates to a cellular heterogeneous network resource distribution method, belonging to the wireless communication technology field. The method comprises: step 1, determining an initial bandwidth distribution strategy based on a customer service demand, notated by b=[b1,b2, ...bN], wherein sigma summation of <N> <i=1> bi=B; step 2, determining MBS and ith FBS, notated by FBSi, wherein the largest transmission rate of a shared frequency spectrum portion is notated by: psi=[R<max> <m,1>, R<max> <m,2>,..., R<max> <m,N>]; step 3, modeling a bankruptcy game model, and determining an MBS and FBS distribution rate; step 4, optimizing and determining a local bandwidth and a power distribution strategy based on an FBS utility function, notated by b*=[b<*>1, b<*>2, ..., b<*>N] and P*=[p<*>1, p<*>2, ..., p<*>N]; and step 5, repeating the steps until an algorithm converges, thereby realizing combined bandwidth and power optimal distribution. The method can effectively guarantee heterogeneous cellular network macro customer and household base station base station customer QoS demands, realize frequency spectrum resource sharing, and improve a frequency spectrum utilization rate and network comprehensive performance.