40 results about "Committed information rate" patented technology

An end-to-end monitoring mechanism whereby edge nodes are notified that a particular path flows through a local protection tunnel along the way. The notification mechanism utilizes OAM packets which include a link protection indication that are transmitted on the Ethernet service layer. The link protection indication may be represented by one or more flags to indicate that local protection is in place along the path. The mechanism enables fast local protection to be used with slower end-to-end protection by informing the latter when local protection is activated. In an implementation in which local-protection does not preserve the CIR of the protected traffic, the invention provides minimal interruption of Committed Information Rate (CIR) connections by minimizing the time traffic is diverted through local protection tunnels. Notification of the edge node that local protection is in use occurs very quickly, thus allowing the edge node to rapidly switch to a backup path.

A method, apparatus and article of manufacture for discarding a data packet. The data packet is classified according to a type of service (TOS) indicator and modified with an internal service class (ISC) indicator according to the TOS indicator. The data packet is modified with a watermark (WM) indicator according to the availability of a system resource. The ISC, WM and a drop preference (DP) indicator of the data packet are compared to a committed information rate (CIR). The packet is discarded if the DP exceeds the CIR.

A communications system operator provides to each user of a multi-user communications system a committed information rate (CIR). When a user requests bandwidth for transmission, a system controller queues the user in a high-priority subclass A. The system controller allocates bandwidth to the user at the head of the queue as requested but if the user's bandwidth, measured as an average over a sampling time, exceeds its CIR, it is moved into a low-priority subclass B. The user can then only obtain further bandwidth after other users in the high-priority subclass have been allocated bandwidth up to their CIRs. If a user in the low-priority subclass only receives allocation of a small amount of bandwidth, so that its average inforamtion rate falls below its CIR, it is moved back in to the queue in the high-priority subclass.

Multiple bandwidth requestors (220), a bandwidth manager (420) and a forward link (410) from the bandwidth manager to the bandwidth requestors are used to allocate bandwidth in a return link beam (210). The uplink bandwidth allocation is preferably based on the information to be transmitted provided by the user Automatic Data Processing Equipment (ADPE) (300) and overall system data loading. The preferred method exercised by the bandwidth manager (420) allocates bandwidth on the return link (210) to individual user terminals in either a minimal rate required for the protocol being exercised (213), a committed information rate required for the services being requested, or a fair share rate (214) that allows maximum transfer of data from the user terminal (201) to the gateway (400).

An approach is provided for supporting a fair access policy to exchange traffic in a radio communication system. A committed information rate (CIR) level is assigned to a terminal according to one of a plurality of throttling states that specify respective different throughput levels according to loading of the communication system. The traffic is forwarded to the terminal based on the current throttling state of the terminal, wherein the traffic throughput is limited to the CIR level of the terminal. This approach as particular applicability to shared capacity systems, such as a satellite communication system.

A method and system for providing a virtual private communication network to transport customer data between a set of customer devices coupled to a provider network. A committed information rate is advertised to a provider tandem. The provider tandem determines whether sufficient network resources exist to successfully transport to a destination customer device all offered data from the set of customer devices.

A system and method are disclosed for using tolerances obtained from a user together with historical information about a communication network to analyze the network's performance and to calculate and recommend a specific change to the committed information rate (CIR) over a given frame relay permanent virtual circuit (PVC). The historical information, which is collected by a network management system connected to at least two communication devices in a communication network, relates to various performance parameters, which may include the total data transmitted, received and dropped above and within the original CIR, and the burstiness of the data. The historical information is automatically analyzed in view of the user's designated tolerances to determine the network's data transmission performance, and a forward-looking recommendation of an optimum CIR is made, based on the analysis. The results of the analysis and the recommended change to the CIR are displayed to the user in a graphical format.

A communications system operator provides to each user of a multi-user communications system a committed information rate (CIR). When a user requests bandwidth for transmission, a system controller queues the user in a high-priority subclass A. The system controller allocates bandwidth to the user at the head of the queue as requested but if the user's bandwidth, measured as an average over a sampling time, exceeds its CIR, it is moved into a low-priority subclass B. The user can then only obtain further bandwidth after other users in the high-priority subclass have been allocated bandwidth up to their CIRs. If a user in the low-priority subclass only receives allocation of a small amount of bandwidth, so that its average information rate falls below its CIR, it is moved back into the queue in the high-priority subclass.

Packets in a Per Hop Basis (PHB) are metered by a network element to see if they fall within a Committed Information Rate (CIR) or Committed Burst Size (CBS) for that PHB. Packets that are within the CIR or CBS for the given PHB are marked as in profile. Packets to be output over a given port that are not in profile are metered by a common Surplus Information Rate (SIR) meter, which is used to meter commonly excess packets from all PHBs configured through that port. By using a common SIR meter to meter out of profile packets for all PHBs on a given port, it is possible to allow packets from multiple PHBs to share the surplus bandwidth on a link connected to that port fairly, while not allocating bandwidth to PHBs that do not require surplus bandwidth. Token buckets may be used to implement the meters.

In a bandwidth policing apparatus which accommodates a large number of user groups, bandwidth policing for each user group is performed at high speed. When there is any extra bandwidth in bandwidth for a user group, the contracted committed information rate for each user is guaranteed invariably while using this effectively. The bandwidth policing apparatus accumulates packets of a plurality of user groups under bandwidth policing in the same packet accumulate FIFO. Also, for a packet which does not exceed the contracted bandwidth for each user, the contracted bandwidth for each user is guaranteed by deciding that the packet does not exceed the contracted bandwidth for each user group.

In a bandwidth policing apparatus which accommodates a large number of user groups, bandwidth policing for each user group is performed at high speed. When there is any extra bandwidth in bandwidth for a user group, the contracted committed information rate for each user is guaranteed invariably while using this effectively. The bandwidth policing apparatus accumulates packets of a plurality of user groups under bandwidth policing in the same packet accumulate FIFO. Also, for a packet which does not exceed the contracted bandwidth for each user, the contracted bandwidth for each user is guaranteed by deciding that the packet does not exceed the contracted bandwidth for each user group.

Methods, systems, and computer program products for allocating excess bandwidth of an output among network users are disclosed. According to one method, packets associated with a plurality of network users for forwarding to an output are received. The packets can include a first non-committed information rate (CIR) packet associated with a first network user. The method can include a step for maintaining a count of non-CIR packets sent for the first network user. Further, the method can include preventing the first non-CIR packet from being forwarded to the output in response to the count having a predetermined relationship with respect to a threshold level.

A method and system for providing a virtual private communication network to transport customer data between a set of customer devices coupled to a provider network. A committed information rate is advertised to a provider tandem. The provider tandem determines whether sufficient network resources exist to successfully transport to a destination customer device all offered data from the set of customer devices.

The invention relates to a message transmission method and a hybrid access gateway. The method comprises the following steps: receiving a message of which the destination is a home gateway sent by network side equipment through the hybrid access gateway; and when that a first transmission link is congested and a second transmission link is not congested is detected, acquiring a first CIR (Committed Information Rate) of the first transmission link and a second CIR of the second transmission link, classifying the message into a first class message and a second class message, transmitting the first class message through the first transmission link, and transmitting the second class message through the second transmission link. Thus, the first transmission link and the second transmission linkcan be accessed into the hybrid access gateway when the first transmission link is congested and the second transmission link is not congested, and the hybrid access gateway can control the one-way delay of the first transmission link and the second transmission link by reasonably allocating messages transmitted by the second transmission link, so that the problem of packet loss caused by sortingbuffer overflow is avoided, and the transmission efficiency of link transmission is greatly improved.

Systems, methods, devices, and processors are described for quality of service (QoS) packet scheduling in satellite communications systems. A packet received at the QoS packet scheduler may be assigned a virtual departure time utilizing novel self-clocked fair queuing techniques. The virtual departure time for a packet assigned to a queue may depend on a different weight assigned to the queues. Queues may be treated as low latency queues in some cases and may be provided with committed information rates in other cases. Low latency queues may be assigned weights equal to infinity, or the reciprocal of the weight equal to zero. Queues with committed information rates may assign different weights to packets depending on whether the rate that packets are received exceeds the committed information rate. Packets may then be scheduled based on their virtual departure time order.

Packet metering systems and methods optimize utilization of green or committed tokens. The packet metering method includes receiving a packet of size B in an interval; and marking a color of the packet as green for committed, yellow for excess, or red for discard, based on the size B, a current committed token bucket for the interval, a current excess token bucket, and an overflow counter used to preserve unused green tokens from previous intervals while preserving Committed Information Rate (CIR) and Committed Burst Size (CBS) for the interval.

The invention discloses a method for controlling the flow of an IP data stream, which comprises the following steps: step 1, carrying out route and flow classified search on data messages based on a preset key word; step 2, carrying out message header processing and dyeing operation based on the matched table entries of the searching result; and step 3, carrying out follow-up action operations, wherein the matched table entries comprise next hop exit, data type, survival time, committed information rate (CIR), token count in bucket C (Tc), token count in bucket E (Te), committed burst size (CBS) and excess burst size (EBS). Based on the similarity between the precise route search and the flow control and the integral design combining the flow control and the precise route search, the invention can greatly simplify the difficulty in designing the flow control function for the IP data stream on the routing and switching device having the precise route search function, thereby lowing the design and production costs.

A method of automatically detecting the service level agreement settings in an Ethernet virtual circuit (EVC) carrying user packets comprises generating synthetic packets different from the user packets, on a data path in the EVC at a level sufficiently high to saturate the EVC. This accelerates the detection of actual effective values for the Committed Information Rate (CIR) and the Excess Information Rate (EIR) by triggering traffic shaping devices in the data path to enforce the CIR and EIR settings configured for those devices. A plurality of traffic samples are collected from the data path during a sampling period that is long enough to allow the collection of at least two valid traffic samples, where a valid traffic sample is the amount of user packets measured between two consecutive losses of synthetic packets. The CIR and EIR values enforced by the traffic shaping devices are determined from the collected samples.

A method of automatically detecting the service level agreement settings in an Ethernet virtual circuit (EVC) carrying user packets comprises generating synthetic packets different from the user packets, on a data path in the EVC at a level sufficiently high to saturate the EVC. This accelerates the detection of actual effective values for the Committed Information Rate (CIR) and the Excess Information Rate (EIR) by triggering traffic shaping devices in the data path to enforce the CIR and EIR settings configured for those devices. A plurality of traffic samples are collected from the data path during a sampling period that is long enough to allow the collection of at least two valid traffic samples, where a valid traffic sample is the amount of user packets measured between two consecutive losses of synthetic packets. The CIR and EIR values enforced by the traffic shaping devices are determined from the collected samples.

The present invention provides a speed-limiting method and a device. The method is applied to a switch. The switch includes a timer. The method comprises the steps of adding a token into a token bucket through the timing triggering condition of the timer or the input triggering condition of data packets; obtaining the trigger delta time according to the latest triggering time and the current time;according to the trigger delta time and a preset unit token generation time, calculating to obtain the number of required tokens; and adding tokens of the required number into the token bucket. Therefore, tokens are added into the token bucket through the timing triggering condition of the timer or the input triggering condition of data packets. As a result, the switch cannot only meet the committed information rate requirements, but also the periodic network speed fluctuation condition can be avoided.

Systems, methods, devices, and processors are described for quality of service (QoS) packet scheduling in satellite communications systems. A packet received at the QoS packet scheduler may be assigned a virtual departure time utilizing novel self-clocked fair queuing techniques. The virtual departure time for a packet assigned to a queue may depend on a different weight assigned to the queues. Queues may be treated as low latency queues in some cases and may be provided with committed information rates in other cases. Low latency queues may be assigned weights equal to infinity, or the reciprocal of the weight equal to zero. Queues with committed information rates may assign different weights to packets depending on whether the rate that packets are received exceeds the committed information rate. Packets may then be scheduled based on their virtual departure time order.

A method of transmitting packets wherein said packets are comprised in a plurality of flows, the flows comprising flow characteristics controlling admission of incoming flows. A plurality of admitted incoming flows with the same class of service are inserted into a queue. A committed information rate value corresponding to said queue and a bandwidth available for transmission of said queue according to the identified committed information rate value are identified. An order for transmission for the queues is established based on the class of service of the queue and the identified bandwidth. A plurality of cells of the same size are generated from a plurality of frames and the cells are distributed between a plurality of individual transmission channels according to the ordered defined for transmission. A transmitter equipment and a receiver equipment are also disclosed.

The invention discloses a channel estimation method of a TDS (Total Dissolved Solids)-OFDM (Orthogonal Frequency Division Multiplexing) system, belonging to technical field of information transmission. For accurately extracting an effective CIR (Committed Information Rate) from a result C (n) C(n) which is obtained by carrying out a slipping correlation calculation to on a baseband signal and a PN1c sequence, the channel estimation method disclosed by the invention comprises the following steps: firstly, adopting an iterative threshold detection (ITD) method to detect a large-amplitude component in the result C(n) and removing a pseudo peak from the C(n) during an iteration process; then, adopting a double-sliding window detection (DSW) algorithm to detect a small-amplitude CIR component; and finally, combining the two detected results. The realizing process of the channel estimation method is shown as figure 4, wherein the detected object C0 (n) of the double-sliding window contains the amplitude CIR component; h1 and a are CIR and h1 obtained by iterative threshold detection; b is CIR obtained by double-sliding window detection; and the sum of a, h1 and b is a channel impulse response CIR vector h1 for channel equalization. The channel estimation method disclosed by the invention is applied, so that the channel estimation precision is high, channel change can be quickly followedtracked, and performance of a receiver can be improved.

A complementary network quality testing method for conducting a test on the quality of service with regard to data transmission taking place in a telecommunication network includes setting up a committed bucket of a committed burst size to receive tokens introduced thereinto at a committed information rate; receiving normal protocol data units and / or test protocol data units, followed by storing the normal protocol data units in a data queue and / or storing the test protocol data units in a test queue; determining whether the normal protocol data units are present in the data queue; and retrieving selectively the test protocol data units from the test queue or determining, selectively and again, whether the normal protocol data units are present in the data queue, depending on whether the tokens are present in the committed bucket.

Packet metering systems and methods optimize utilization of green or committed tokens. The packet metering method includes receiving a packet of size B in an interval; and marking a color of the packet as green for committed, yellow for excess, or red for discard, based on the size B, a current committed token bucket for the interval, a current excess token bucket, and an overflow counter used to preserve unused green tokens from previous intervals while preserving Committed Information Rate (CIR) and Committed Burst Size (CBS) for the interval.

A method of bandwidth management enabling to insure a guaranteed bandwidth to each station of transmission network comprising a plurality of stations (10, 12, 14) forming a logical ring wherein a token frame is circulating from station to station, each station being allowed to transmit a credit (c) of data bytes upon reception of the token frame wherein the credit is increased in proportion to a variable TRTT standing for Token Round Trip Time which is the time taken for the token frame to circulate around the logical ring since the preceding reception of the token frame by the station. The credit is increased in proportion of a variable CIR standing for Committed Information Rate which is the guaranteed transmission rate that the station can use to transmit data wherein the value of CIR is determined by a class of bandwidth which has been previously selected by the station upon the preceding reception of the token frame by the station.

The invention discloses a management method and a system for commitment access which belongs to network management field. The method comprises: calculating the message flow rate in preset time; comparing the calculated message flow rate with the allocated commitment information rate; if the calculated message flow rate is bigger than the allocated commitment information rate, then applying for the commitment access rate resource; if the calculated message flow rate is smaller than the preset proportion of the allocated commitment information rate, then releasing the commitment access rate resource. The system consists of a commitment access rate allocation module, a rate calculation module, a comparison module, an application module and a releasing module. The invention manages the commitment access rate resource dynamically by message flow triggering, which can fully utilize the commitment access rate resource and relieve the tension of commitment access rate resource.

Systems and methods in a node in an Ethernet network include, responsive to enabling burst monitoring between the node and a peer node in the Ethernet network, obtaining rate and burst size information from the peer node; configuring a counter at a traffic disaggregation point based on the rate and the burst size information, wherein the counter is based on a dual token bucket that is used to count out-of-profile frames in excess of a Committed Information Rate (CIR); and detecting a burst based on the out-of-profile frames during a monitored time interval.