286 results about "Residual bandwidth" patented technology

An apparatus and method for allocating a bandwidth for up-stream data transmission to a plurality of Optical Network Units (ONUs) in an Ethernet Passive Optical Access Network (EPON) in which the ONUs are connected to a single Optical Line Terminal (OLT) are disclosed. The bandwidth allocation method for guaranteeing a Quality of Service (QoS) in the EPON includes the steps of: a) classifying up-stream data to be transmitted from a plurality of Optical Network Units (ONUs) of the EPON to an Optical Line Terminal (OLT) into a plurality of classes according to predetermined data priority information, and requesting bandwidths required for individual classes from the OLT; b) allowing the OLT to perform a bandwidth distribution process according to bandwidth requirement quantities of individual classes using weights pre-assigned to individual classes; and c) allowing the OLT to distribute a residual bandwidth acquired after the bandwidth distribution process is performed from among an available total up-stream bandwidth to the ONUs.

A transmission control apparatus for improving PCT bi-directional transmission performance in an end node or gateway node of an asymmetric bandwidth pre-allocated subscriber network. The transmission control apparatus includes a TCP classification module for acquiring a TCP ACK packet to be transmitted over an uplink during bi-directional transmission; a band-width estimation / prediction module for estimating bandwidth of a downlink corresponding to the uplink at a time when the ACK packet is acquired, predicting following bandwidth of the downlink according to the estimated bandwidth, and calculating a optimal window size of the downlink such that the predicted bandwidth maintains residual bandwidth enough to allow transmission of an ACK packet over the downlink link compared with the maximum bandwidth allocated to the downlink; and a controller for inserting the calculated optimal window size as a reception window size included in the ACK packet and delivering the ACK packet to a destination node.

A method of assessing a communication route comprising a plurality of links between nodes in a mobile ad-hoc network comprises calculating the two-hop residual bandwidth of each node I of the route as BI⁡(t)=B-∑J∈N⁡(I)⁢B⁡(J)ϕwhere B is the raw channel bandwidth, the summation is the overall consumed bandwidth from node I's two-hop neighborhood nodes, JεN(I) and φ is a factor to account for protocol overhead, which may include handshaking, packet collision, re-transmission and / or back-off scheme traffic. An estimated transmission time for each of a plurality of links between said nodes may be calculated taking said two-hop residual bandwidth into account. For each possible route, a route efficiency function is determined at least by summing the estimated transmission times for all the links in the route, and the route in which the value of the route efficiency function is smallest is selected.

The embodiment of the invention provides a method for sharing frequency spectrum resource of an isomerism wireless network and a device thereof. The method comprises the following steps: a bandwidth requirement of a current network in designated time is predicted; if residual bandwidth resource of the current can not meet the predicted bandwidth requirement, then other wireless network bandwidth resource in the same overlay area is searched, then bandwidth resource dispatch is carried out on the searched wireless network which has useable and unoccupied bandwidth resource so as to meet the predicted bandwidth requirement of the current network. Therefore, the method effectively improves the utilization rate of wireless resource of the isomerism wireless network, the access rate of customer service and the throughput of the system, thus improving the performance of the system.

Systems and methodologies are described that facilitate dynamically adjusting scheduling priorities in relation to a combination of delay sensitive flows with delay requirements and best effort flows. The systems and methodologies provide optimal and efficient techniques to enable real time adjustment and assignment of bandwidth for a combination of best effort flows and delay sensitive flows. In particular, the bandwidth allocation is adjusted for each data packet such that delay requirements are met and the remaining bandwidth can be assigned to best effort flows.

The invention provides an establishing method of label switching path of minimizing path occupy cost in a multi protocol switching network. A link is wiped out when the not-reserved bandwidth is smaller than the bandwidth r of label switching path established by request in network topology. In the residual network topology, the residual bandwidth of each link is used as routing tolerance, and a priority algorithm of shortest path based on obligation is operated to find an optimal path of the said label switching path. For the said selected link on the optimal path, the residual bandwidth is analyzed whether it is more than or equal to the bandwidth r of label switching path established by request if yes the occupation is needless, if not, the occupation is necessary, the occupation formula is Y=alpha* p+ epsilon / |(b-r)|+sigma*n + theta*b. The invention not only establishes a label switching path for a new LSP request in minimal occupy cost, and obtains load balance and effectively increases the level of network resource utilization.

The present invention relates to the resource dispatch of a broadband wireless access system based on an IEEE802.16, the present invention is characterized in that the reserved bandwidth required by mutual necessity is calculated according to the Qos parameter of the different business, the admission and control is performed to the newly achieved business according to the reserved bandwidth, and the bandwidth is distributed by the means of a secondary dispatching mode according to bandwidth required by each business and the bandwidth required by a system, the reserved bandwidth is distributed according to each business firstly, the secondary dispatch is performed to the insufficient part of the bandwidth required by the means of the weighted recycle transfer method according to the residual bandwidth after a primary dispatch is performed to the system, the secondary dispatch distributes the different priority factors among the different businesses according to the business priority, meanwhile, the distribution performed according to the actual scale of the bandwidth required by the business residue accounting for the bandwidth required by residue also shall be taken into account. The present invention has the advantage of the equity, the high efficiency, the simplicity and the flexibility on the basis of ensuring the Qos quality.

The invention relates to a flow control method based on application layer detection .The flow control method based on the application layer detection is a systematic method of identification and control for the flow of a variety of web services. Bandwidth management is carried out for different user groups. Different bandwidths are distributed to different user groups according to difference of businesses of departments in enterprises. The bandwidths of some users are limited. Each group of users can obtain the minimum guaranteed bandwidth whenever the users surf the internet and network congestion can be avoided. Maximum bandwidth which can be borrowed and borrowing priority of each group are set at the same time. Therefore, waste of resources caused by excess bandwidths of sub-networks can be avoided and users of high priority can borrow more remaining bandwidths. Bandwidth management is carried out for different application protocols. Different bandwidths are distributed to different application protocols according to criticality of businesses. Different priority levels are set, and non-critical business flow of peer-to-peer (P2P) and the like are restrained. Therefore, service quality of critical businesses is guaranteed.

This invention relates to measure method and system for bottle wide and remain wide band in the label barrel speed limit network path, wherein, the method comprises the following steps: establishing send end and receive end for data interacting; firstly detecting and judging whether the linkage is label speed limit network path; if yes, then computing linkage each label parameters, bottle and remain wide band; if not adopting traditional method to measure and compute the bottle wide band and remain wide band. The invention is free of label speed limited.

In subscriber units 0 to (N−1), a subscriber unit to be allocated to a bandwidth is defined as a subscriber unit K, where K is an integer from 0 to (N−1) inclusive. In a bandwidth allocating method, a free bandwidth in a communication channel ch(K−1) not used by the subscriber unit (K−1) is found, and a bandwidth requested by the subscriber unit K is allocated to the free bandwidth in the communication channel ch(K−1). A free bandwidth in the communication channel chK is found on the basis of a residual bandwidth requested by the subscriber unit K not allocated to the bandwidth in the communication channel ch(K−1), and the residual bandwidth requested by the subscriber unit K is allocated to the found free bandwidth in the communication channel chK. The operation is repeated for the subscriber units 0 to (K−1) and (K+1) to (N−1).

The invention relates to a dynamic bandwidth allocation method for dynamically allocating the bandwidth of exchange network of distributive equipment. The destination end of the exchange network allocates total egress bandwidth to each source port once in every set time interval, and the maximal bandwidth allocated to each source port is the maximal allocated bandwidth of the source port. The bandwidth allocation is based on the congestion state and the measurement bandwidth of each source port, including allocating egress bandwidth satisfying the most basic bandwidth requirement to each source port. If the total egress bandwidth still has remains after allocating the basic bandwidth, the residual bandwidth is allocated to the source ports including the one reporting congestion until all of the bandwidths is allocated and the source port having the maximal allocated bandwidth exits the subsequent residual bandwidth allocation. The inventive dynamic bandwidth allocation method can predict the behavior in a future period according to the measurement bandwidth in the current time, thereby preventing the occurrence of congestion and effectively utilizing the limited egress bandwidth resources.

The invention discloses a method and device of simultaneously supporting AFDX ((Avionics Full-duplex Switched Ethernet) and common Ethernet switching, which mainly solves the problem that AFDX switching equipment in the prior art cannot simultaneously support the AFDX and common Ethernet switching. The method comprises the steps of: (1), extracting grouping feature information; (2), receiving scheduling groups; (3), searching a forwarding table; (4), filtering and policing; (5), enqueueing the group; and (6) sending the scheduling groups. The device comprises an input caching module, a receiving scheduling module, a port lookup table module, a sharing lookup table module, a filtering and policing module, an output queue module, a sending scheduling module, and an output caching module. The invention has the advantages of improving the flexibility of an AFDX networking mode and the feasibility that an Ethernet information terminal in a manned space flight domain machine is accessed to the AFDX, and sufficiently utilizing the residual bandwidth in the AFDX, and effectively improving the bandwidth utilization rate of the AFDX, and is applicable to network and exchange aspects.

The invention relates to a routing method based on bandwidth and delay bi-objective optimization. The method comprises the following steps that: a source node sends a request to send; a cost table is initialized; if a timer is judged to be overtime, the cost table is updated and the timer is restarted; a routing table is generated according to the shortest path algorithm; and a current node seeks the next-hop node according to the routing table to establish a complete route. The method has the following beneficial effects: the bandwidth and the delay can be well balanced; and the link with larger residual bandwidth is selected under the condition of heavy link bandwidth load, thus greatly improving the average minimum bandwidth of the path under the condition of limited change of the average end to end delay of the path.

Methods and systems for fine grain bandwidth allocation are disclosed. According to one method, input is received from a user in a standard bandwidth denomination indicating bandwidth to be provided by a switched network element. The bandwidth is automatically converted into a base bandwidth value and a residual bandwidth value. The base bandwidth value is converted to a number of tokens to be placed in a token bucket every predetermined token bucket refresh interval. The residual bandwidth value is converted into a second number of tokens and a number of predetermined token bucket refresh intervals over which the second number of tokens is to be placed in the token buckets. The token buckets are then refreshed in accordance with the base and residual bandwidth values and the token bucket refresh intervals. The queue is serviced in accordance with available tokens in the token buckets.

The embodiment of the invention provides a flow control method and system, and a centralized controller, and relates to the technical field of communication. The problem that flow is only forwarded according to an IP path in a flow dredging process, resulting in that the flow transmission effect cannot meet the actual demands of a user to the business quality in the prior art is solved. The method comprises the following steps: a network edge device sends network monitoring information of a user terminal to the centralized controller, wherein the network monitoring information comprises a flow type and an occupied bandwidth; a network forwarding device sends link delay information to the centralized controller, wherein the link delay information comprises a residual bandwidth of the link and a link transmission delay; the centralized controller determines a target forwarding path according to the network monitoring information sent by the network edge device, the link delay information sent by the network forwarding device and business demand information, and releases the target forwarding path and a flow control strategy to a network device. The flow control method and system, and the centralized controller provided by the invention are applied to flow control.

The present invention relates to a residual bandwidth multiplexing method. It contains respectively configuring limitation bandwidth to miscellaneous service using plurality of leak pails, collecting overflowed token from said plurality of leak pails to sharing leak pail, taking out token from sharing leak pail, to make service message exceed limitation bandwidth passing. The present invention relates to network equipment. The present invented technical proposal is used for collecting other leak pail overflowed token to realize bandwidth multiplexing through configuring a sharing leak pail. The use of sharing leak pail can be used in miscellaneous service limitation band width, taking out token when the token number is not enough, avoiding band width wastage.

Based on requested bandwidths received from all edge nodes and destination edge nodes, the total reservation of the bandwidths requested by respective edge nodes for each link is calculated, and the total value is subtracted from the maximum admissible bandwidth of the link to obtain the residual bandwidth, and it is decided whether a new requested bandwidth is less than the residual band of which link of the path to the destination edge node.

The invention provides an intelligent QOS (Quality of Service) method and an intelligent QOS system based on a token bucket, and belongs to the technical field of network application. The intelligent QOS method comprises the following steps: marking a priority of a message, sending a data package marked with the priority to a user guarantee token bucket; determining whether the user guarantee token bucket is within a guarantee bandwidth, if so, sending the data package to a system guarantee queue, if not, sending the data package to a user queue according to user classification; calling, by a scheduler, data packages in the system guarantee queue into a system token bucket based on a priority order, if remaining bandwidth is available, calling the data packages in the user queue into the system token bucket; and sending, by the scheduler, the data packages according to a token in the system token bucket. The intelligent QOS method disclosed by the invention has the following beneficial effects that a punishment mechanism is added in a system on the principle of equity, part of waiting applications do not occupy a lot of bandwidth any more, the bandwidth is distributed to other applications; delay is reduced obviously; and user's network environment is improved obviously.

The invention relates to an adaptive multimedia stream link transmission method. A server node automatically selects a unicast / multicast way to transmit data to a client node according to actually measured network traffic conditions. When network traffic is relatively higher / lower, a multicast / unicast way is adopted respectively. The network traffic is determined by periodically transmitting control information before the transmission of the data to monitor a service link number and the round trip time of the data from the server node to the client node in real time, and judging a magnitude relationship between bandwidth required by the client node and the residual bandwidth of the server node. In addition, the size of a data packet and corresponding retransmission and packet loss control mechanisms are also set. By the method provided by the invention, the unicast or multicast way can be adaptively selected according to the network traffic conditions to transmit the data, so the basic service requirements of a user may not be influenced and convenience can be brought to the addition of a multicast user into a multicast group when the network traffic is relatively higher, and resources in a network can be fully utilized when the network traffic is relatively lower.

The invention discloses a bandwidth adjusting method and related equipment, and is used for realizing flexible adjustment of bandwidth. A controller obtains behavior characteristic statistical information sent by an end cloud node device and obtains system residual bandwidth resources, wherein the behavior characteristic statistical information refers to a statistical result of behavior characteristics of occupied network bandwidth of users accessed to the end cloud node device; the controller determines the adjustment quantity of the bandwidth of the end cloud node device according to the behavior characteristic statistical information and the system residual bandwidth resource; and the controller sends a bandwidth adjusting instruction to a first network device, wherein the bandwidth adjusting instruction is used for instructing the first network device to adjust the bandwidth allocated to the end cloud node device by network equipment on a transmission link according to the adjustment quantity of the bandwidth.

The invention discloses a link circuit distribution method in a communication network, which comprises comparing the size of residual bandwidth and request bandwidth of existing service to distribute bandwidth of link circuit according to residual bandwidth of the existing link circuit after link circuit which can do bandwidth distribution is chosen, wherein the steps of calculating residual bandwidth of existing link circuit comprises utilizing total bandwidth to subtract occupancy bandwidth of optimum grades which are not lower than existing service request on existing link circuit. Since the invention distributes link circuit bandwidth in communication network according to optimum grade information of service request, which utilizes the occupancy bandwidth of optimum grades which are not lower than existing service request on existing link circuit and is subtracted by the total bandwidth to be existing bandwidth to distribute, link circuit bandwidth in communication network is firstly distributed to services whose optimum is higher, the bandwidth firstly tries to be distributed to important and urgent service requests whose optimum grades are higher, and the utilization ratio of bandwidth is higher.

The invention discloses a prefetch method for fixed-point data in Peer-to-Peer on demand system, comprising the steps of: (1) the time interval of a pointing device is decided by analyzing user's behavior and experience improvement; a medial head file and a data file are resolved by a file analyzer, metadata information is recorded and a corresponding index file is created; (2) according to media index file information, in condition of acquiring current playing data, prefetching point data is acquired from partner node or source server on 'Minimum Redundancy First' principle with residual bandwidth,; and (3) according to the drag position, integrating the media acquiring data in current channel cache window, a client automatically adjusts the play position to the user-appointed time point, or nearest prefetching point. The invention is based on observation of user's behavior and makes full use of the characteristic of Peer-to-Peer, realizes effective share of fixed-point data, lowers bandwidth consumption of a stream media server, improves user's watch experience, and is suitable for large-scale application.

The invention discloses a path processing method, an optical communication device and an optical communication system for an optical network. The method comprises the following steps that: a path computation element (PCE) acquires network topology information, wherein the network topology information comprises a parameter which indicates the link type and the total service bandwidth of a link, a parameter which indicates the residual bandwidth of the link and a parameter which indicates whether the link supports an optical channel data unit flexible (ODUflex) service or not; the PCE acquires a request message sent by a node, wherein the request message carries a flow parameter for establishing service connection and the flow parameter comprises the signal type of the ODUflex of an opticalchannel data unit (ODU) of which the signal type is a flexible bandwidth, and the service bandwidth of the ODUflex; and the PCE determines a link which supports the ODUflex service and meets a time slot resource needed by the ODUflex service in the network according to the flow parameter and the network topology information in the request message and determines a path which supports the ODUflex service according to the determined link. A path which is associated with ODUflex connection can be determined.

The invention provides a user access method and access network equipment, relates to the technical field of communication, and solves the problem that how to meet the access demands of 2B (understandable as a private network) users and 2C (understandable as a public network) users of different operators as much as possible under the condition of limited resources after co-construction becomes an urgent problem. The method comprises the following steps: acquiring network data of a target service of each of N operators in the current unit time; when determining that the network data of the target service of the nth operator meets a preset condition, determining the bandwidth demand of the target service in the current unit time according to the network data of the N operators; and when determining that the residual bandwidth of the carrier for bearing the target service is greater than the bandwidth demand, allowing the new user of the target service to access core network equipment corresponding to the target service in the current unit time.

The embodiment of the invention provides a flow control method based on token scheduling, comprising the following steps of: after an output flow manager distributes tokens according to the queue state information of a notification, and when distributable tokens do not receive new state information, the output flow manager sends indication information available for residual bandwidth to an input flow manager; the input flow manager sends queue state indication information according to the indication information available for the residual bandwidth, and the queue state indication information is used for the output flow manager to determine data quantity which can be sent by the input flow manager before a next periodic queue state information notification; the output flow manager distributes the tokens to the input flow manager according to the determined data quantity; and the input flow manager sends data came after the periodic queue state information notification according to the distributed tokens. The embodiment of the invention can sufficiently utilize the residual bandwidth and enhance the utility ratio of the bandwidth of a switching system.

The invention relates to a bandwidth resource distribution system. The bandwidth resource distribution system comprises a priority grading strategy storage module, a data packet classifier, a data packet processor and a residual bandwidth estimation module, wherein the data packet classifier reads a priority grading strategy from the priority grading strategy storage module and classifies network data packets which are transmitted from the outside world and are processed through a network protocol stack, the classified network data packets are transmitted into the data packet processor, the data packet processor processes the network data packets according to an estimation result of the residual bandwidth estimation module, so that it is guaranteed that the data packet with the high priority is processed preferentially, and the network data packets are finally distributed to corresponding external applications. According to the bandwidth resource distribution system, the access bandwidth and the reversed bandwidth of the system do not need to be assumed in advance, fine granularity scheduling of network data can be conducted according to the priorities, and the network service can be provided for services with lower priorities by means of the residual bandwidth on the premise that the application with the high priority can obtain the bandwidth resources as many as possible.

The embodiment of the invention provides a transmission line relay protection control service channel route configuration method and device. The specific implementation way of the method comprises the following steps: according to information of an initial node and a terminal node in a received route configuration request, and network topology information, determining a plurality of routes between the initial node and the terminal node by adopting breadth-first search, and obtaining a first route set; determining a risk value corresponding to each route according to a node included in each route in the first route set and a risk value of each conserved node; recognizing routes that the corresponding risk values of the routes are smaller than a preset risk threshold and the born service quantity and the residual bandwidth meet a preset condition from the first route set, and acquiring a second route set; and recognizing routes of a preset first quantity threshold with smaller time delay values in the second route set, and taking the recognized routes as configured routes. By applying the embodiment of the invention, the route configuration of a relay protection service can be optimized.

The present invention relates to a residual band width multiplexing method, which contains A, configuring plurality of leak pails, said plurality of leak pails respectively corresponding different grade service; B, using overflowed token from said leak pail in order impregnating to other grade service corresponded leak according to service grade. The present invention realizes user total bandwidth limitation and different kinds of service bandwidth limitation through leak pail technology, the rest part capable of shared using by other service according to \priority grad, to realize band width in order multiplexing, solving tradition leak pail technologic shortage.

The invention discloses a method for realizing multilevel queue scheduling in a data network. The method comprises the following steps of: sending the message into the tail part of a corresponding queue according to the priority of the received message; if the exit direction of the current network is not congested, forwarding the message received currently; otherwise, according to the queue scheduling mode of strict priority queues, weighted fair queues and idle queues which are preset, firstly executing scheduling processing flow of the strict priority queues; then, if the exit direction of the current network also has residual bandwidth, executing scheduling processing flow of the weighted fair queues; and then, if the exit direction of the current network also has residual bandwidth, carrying out forward processing to the messages in the idle queues. The invention also provides a device used for realizing multilevel queue scheduling in the data network. The method can lead the messages without need of guarantee not to preempt the bandwidth, thus improving the flexible application capability of queue scheduling.

The invention discloses a flow distribution method and equipment in an SPBM network. The method and equipment is applied to the SPBM network provided with BEB equipment and / or BCB equipment. The method includes the steps of (1) synchronizing a link state database, and obtaining link bandwidth information and bandwidth information required by B-VLANs, (2) selecting a current B-VLAN to be processed according to the priority of the B-VLANs, screening a link meeting requirements of the current B-VLAN bandwidth according to the link bandwidth information and the bandwidth information required by the B-VLANs, calculating an SPT tree for the current B-VLAN to be processed, and accordingly obtaining an optical route, (3) determining the residual bandwidths not occupied by link interfaces currently according to the determined optimal route in topologies of a whole network, (4) when other B-VLANs need topology calculations, on the basis of the residual bandwidths of the link interfaces, repeating the steps of determining the optimal route and determining the residual bandwidths not occupied by the link interfaces currently, and accordingly finishing the topology calculations of all the B-VLANs. The situation that network resources are distributed according to flow bandwidths is achieved, and the network utilization rate is improved due to the fact that a suboptimal route transmits flow.