Abstract: A source-based memory usage table is accessed to identify a source having a memory usage satisfying a predetermined memory usage threshold, the source-based memory usage table including a plurality of source records, each corresponding to a source from which packets are received. A first flow control signal is transmitted to the identified source that has a memory usage satisfying the corresponding predetermined memory usage threshold to control further packet transmission from the identified source. A priority-based memory usage table is accessed to identify a priority of which a memory usage satisfies a predetermined memory usage threshold of the priority. A second flow control signal is transmitted to one or more sources associated with the identified priority having a memory usage satisfying the corresponding predetermined memory usage threshold to control further packet transmission from the identified one or more sources.

Abstract: Method and apparatus for power boosting a portion of installments in transmission of a packet of data. The power boosting incorporates a power boost factor for each installment. On receipt of a negative acknowledgement after the power boosted portion of installments, transmission of the subpacket is terminated, and processing passed to a higher layer.

Abstract: A communication network design circuit can derive a path and a necessary link capacity for multiple point communication service permitting arbitrary communication within a predetermined range of communication amount by providing traffic amount of data in-flowing through an ingress node and traffic amount of data flowing out through an egress node. The communication network designing circuit has setting means for setting a mathematical programming problem for deriving the multiple point communication service and optimizing means for solving the mathematical programming problem set by the setting means and obtaining the path for the multiple point communication service.

Abstract: A wireless communication system includes an apparatus and a method for supporting Hybrid Automatic Repeat Request. A transmitting method includes when an encoding packet is bigger than a maximum encoding packet size Nep_max, generating a first codeword by encoding the encoding packet at a mother code rate t; generating a second codeword by selecting [Nep_max/t]-sized code bits from the first codeword; and performing Hybrid Automatic Repeat reQuest (HARQ) using the second codeword.

Abstract: A method of visualizing network data includes parsing a collection of packets in accordance with a set of categories related to characteristics of the collection of packets, the categories including listings of categorical elements, wherein at least some of the categorical elements are selectable by a user. When a categorical element is selected by a user, the collection of packets is filtered in accordance with the selected categorical element. Alongside each categorical element is a selectable count value that is indicative of the number of discrete communications sessions in which an associated categorical element is present in the collection of packets. When the count value is selected, a session view or views is/are created for each respective session, with content payload available for review and viewing.

Abstract: The present invention relates to a method and an apparatus for controlling message traffic licenses. The method includes: controlling message traffic through an ordinary license; judging whether the triggering conditions of using the first extended license are fulfilled, and, if the triggering conditions are fulfilled, using the first extended license to control the message traffic. The apparatus includes: a license management module, adapted to switch between the licenses according to the triggering conditions of the message traffic license; and a control module, adapted to control the message traffic by using the license selected by the license management module.

Abstract: A method is intended for computing online a feasible rates region in a network using a random access MAC protocol and comprising nodes having links there between. This method comprises the steps of i) determining, for each link, a primary extreme point corresponding to a maximum output rate when this link transmits alone at a maximum input rate, and ii) determining secondary extreme points by combining these primary extreme points with a chosen interference model, these primary and secondary extreme points defining a boundary of a feasible rates region.

Abstract: For an error rate QBER, threshold values are preset, including a threshold value Qbit for frame synchronization processing, a threshold value Qphase for phase correction processing, and a threshold value QEve for eavesdropping detection. Upon the distribution of a quantum key from a sender to a receiver, when the measurement value of QBER is deteriorated more than Qbit, frame synchronization processing is performed. When the measurement value of QBER is deteriorated more than Qphase, phase correction processing and frame synchronization processing are performed. When QBER does not become better than QEve even after these recovery-processing steps are repeated N times, it is determined that there is a possibility of eavesdropping, and the processing is stopped.

Abstract: The selection of the spatial mode together with modulation and encoding schemes based on channel condition measurements requested from MS forms a basis for selecting a best transmission data rate in a wireless link in every channel conditions. A method and network element comprising multiple-input multiple-output (MIMO) capable antenna technology allows the use of a best transmission data rate in the channel if selection of transmission mode has been made correctly. The thresholds for transmission mode selections are pre-determined and compared to instantaneous channel quality information. The practical MIMO solution based on correct selection procedure provides also continuous sufficient channel condition for terminal users when the user moves from LOS situation to NLOS situation.

Abstract: One embodiment relates to a network device configured with many-to-one connection-rate monitoring. The network device includes sampling circuitry configured to sample packets from a port and a software-implemented agent. The agent is configured to receive the sampled packets and to determine a number of distinct sources for each destination in the sampled packets. Another embodiment relates to a method of many-to-one connection-rate monitoring. A rate of traffic at a port of a network device is measured, and the measured traffic rate is compared with a pre-set threshold rate. If the pre-set threshold rate is exceeded by the measured traffic rate, then packets from the port are sampled over a period of time. The sampled packets are analyzed to detect a high rate of connections to a single destination. Other embodiments, aspects and features are also disclosed herein.

Abstract: An approach is provided for auto-bandwidth adjusting bandwidth allocations for traffic-engineered tunnels used to carry traffic along a network. Traffic over the tunnel is sampled at a first interval period and at a second interval period, where the second interval period is shorter than the first interval period. A determination is made as to whether the sampled traffic taken using the second interval period is greater than the bandwidth allocation, and the bandwidth allocation is adjusted upward based upon a determination that the sampled traffic taken using the second interval period is greater than the bandwidth allocation. Also, a determination can be made as to whether the sampled traffic taken using the first interval period is less than the bandwidth allocation, and the bandwidth allocation can be adjusted downward based upon a determination that the sampled traffic taken using the first interval period is less than the bandwidth allocation.

Abstract: A method of receiving communications at a data processing device includes receiving a packet from a virtual channel associated with a physical communication link. The packet is associated with a link virtual channel, and is stored in a storage location with the link virtual channel. Multiple internal virtual channels can be associated with the link virtual channel. A pointer to the storage location is enqueued in one of a plurality of FIFOs associated with one of the internal virtual channels. Each FIFO of the plurality of FIFOs stores pointers associated with a different internal virtual channel, allowing receiver arbitration logic to reorder between internal virtual channels based on internal resource availability and current priorities among virtual channels. This reduces the likelihood of communication deadlock and supports multiple classes of service.

Abstract: A method is provided for maximizing utility of a media delivery network having a media source, a first media adaptor, a second media adaptor and a media renderer. The media source can provide data in a first format and a second format. The first media adaptor can receive the data in the first format from the media source. The second media adaptor can receive the data in the second format from the media source. The first media adaptor can further provide data in a third format based on the received data in the first format. The second media adaptor can further provide data in a fourth format based on the received data in the second format. The media renderer can render the data in the third format and can render the data in the fourth format.

Abstract: A method, apparatus, and computer implemented instructions for managing traffic in a network data processing system. Traffic for a plurality of network paths is monitored. In response a packet for a particular network path within the plurality of network paths causing traffic for the particular network path to exceed a level of traffic allowed, an amount of available bandwidth is reduced based on a fair share for the particular network path.

Abstract: A method, apparatus and computer-readable storage medium for regulating packet flow through a device such as a router with a switch fabric. Congestion information, such as statistics on bandwidth utilization, is collected for each of a plurality of queues at an egress stage of the device. Based on the bandwidth utilization statistics, computations are performed to evaluate a “discard probability” for each queue. This information is transmitted to the ingress stage, either periodically or at other controlled time periods, such as when the discard probability changes significantly. The ingress stage can then proceed with controllable transmission or non-transmission of packets to the switch fabric, depending on the queue for which the packet is destined and also depending on the discard probability for that queue. In this way, congestion can be avoided even before it even has a chance to occur.

Abstract: In a label switching network using a plurality of labels, a communication apparatus receives signaling information for setting a first label switching tunnel. This signaling information includes one or more values of one or more labels representing one or more pseudowires accommodated in a first label switching tunnel, the bandwidth information of the pseudowire, and the bandwidth-sharing identifier. A bandwidth management table holding correspondence relationships between values of a plurality of labels, the bandwidth information, and the bandwidth-sharing identifiers are generated. One or more second label switching tunnels may be accommodated instead of one or more pseudowires.

Abstract: The need to monitor real time network services has prompted service providers to use new measurement technologies, such as service-specific probes. A service-specific probe is an active probe that closely mimics the service traffic so that it receives the same treatment from the network as the actual service traffic. Service-specific probes are end-to-end and their deployment depends on solutions that address questions such as minimizing probe traffic, while still obtaining maximum coverage of all the links in the network. A polynomial-time probe-path computation algorithm is provided as well as a 2-approximate solution for merging probe paths when the number of probes exceeds a required bound k. The algorithms are evaluated using ISP topologies generated via Rocketfuel. For most topologies, it is possible to cover more than about 98% of the edges using just about 5% of the nodes as terminals.

Abstract: Methods are provided for managing hierarchically organized subscriber profiles. According to one embodiment, a policy engine of a VR defines services available to subscribers in terms of profile identifiers. A scalable subscriber profile database is established having a memory requirement dependent upon the number of available service contexts by hierarchically organizing profile identifiers as leaf profile identifiers, which explicitly define services, and intermediate profile identifiers, which indirectly represent services. The policy engine receives a first-level profile identifier and determines whether it is among those stored in the database. If not, then it obtains service profile information associated with the first-level profile identifier. If the first-level profile identifier is an intermediate profile identifier having leaf profile identifiers, then it further obtains them and associated profile information and stores this information in the database.

Abstract: A system for centrally controlling packet network communications may include an input/output (I/O) unit configured to communicate data packets over a packet network with multiple network communications devices, a processing unit in communication with the I/O unit and configured to communicate with the network communications devices via respective node segments, and a memory in communication with the processing unit and configured to store a table. The processing unit may be configured to receive and store network performance information of node segments generated by the network communications devices. The network performance information may be stored in the table in association with indicia representative of the node segments, respectively. The processing unit may further be configured to control network communications by the network communications devices over the node segments based on the network performance information stored in the table.

Abstract: A mobile communication device has a wireless transceiver and one or more processors for communicating data in a wireless communication system. The one or more processors are operative to receive a plurality of data packets of varying payload size in a queue; associate one or more of the data packets from the queue into a group, such that a total size of the group is at or near a maximum transmissible unit (MTU) size of a data frame; cause the one or more data packets associated into the group to be formatted into the data frame for data transmission via the wireless transceiver; and repeat, for a plurality of data frames, the associating and formatting, for communicating the data via the wireless transceiver in the wireless communication system. By associating the data packets into groups having the MTU size, data throughput of the data transmission is increased.

Abstract: A cellular communication system comprises a Mobile Management Entity, MME, 117 and a load characteristic processor 203 that determines an MME load characteristic for base stations 101-107 in response to a measured operating characteristic thereof. A selection processor 207 selects a subset of base stations in response to the MME load characteristics, and a load monitor 205 determines an MME load level measure. A transmit controller 209 transmits a load reduction indication for the MME to the subset of base stations in response to the MME load level measure meeting a criterion. The base stations receiving the load reduction indication bias their operation towards a reduced load level of the MME.

Abstract: For each broadcast control channel of a plurality of broadcast control channels associated with a plurality of wireless networks, a mobile device decodes control information on the broadcast control channel and stores this control information in its memory. The control information includes a network identification which uniquely identifies a particular wireless communication network. Such decoding is performed in between or during repeated acts of measuring signal strength levels of an RF signal on the broadcast control channel, and prior to completion of an averaging function for calculating an averaged signal strength level of the signal strength levels on the broadcast control channel. Decoding may be performed only for those broadcast control channels identified to have the most optimal signal strengths.

Abstract: Parameterized Quality of Service (QoS) may be provided. In response to receiving a registration request from a device, a determination of resource availability may be made. If resources are available to satisfy data flows to the device, a flow priority may be established and the device may be added to the priority queue configuration. If the device later requests establishment of a data flow, the data flow may be transmitted at the established flow priority.

Abstract: A method of operating an ad hoc network comprising a plurality of devices (11-16). Each device includes communication means for communicating with other ones of the plurality of devices when they are in range. The method involves storing on each device one or more nodal policies (1-6) which specify rules for determining how a device should behave in response to various prevailing circumstances and controlling each device to operate in accordance with one or more of the stored nodal policies. Additionally, each device stores a fitness parameter and adjusts the value of the fitness parameter in dependence upon the level of activity of the device (in particular, activity which is consistent with its stored policies).

Abstract: A method of requesting and allocating an upstream bandwidth in an RS in a multi-hop relay BWA communication system is provided. The RS receives an upstream bandwidth request message including an upstream bandwidth from at least one MS for a predetermined time period, detects the requested upstream bandwidth from the upstream bandwidth request message, calculates a total requested upstream bandwidth by summing the requested upstream bandwidth from the at least one MS, generates a new upstream bandwidth request message including the total requested upstream bandwidth, and sends the new upstream bandwidth request message to a BS.

Abstract: A data flow rate policer enforces data flow policies for a number of data flows using a probabilistic policy enforcement mechanism. The policer includes a memory that stores the state of each data flow in a compact data structure. Additionally, the policer includes one or more policing engines that implement the actual data flow policies based on information derived from the data structures. The policing engines may be implemented in hardware to increase performance.

Abstract: A methodology for using multiple execution threads to regulate message traffic is presented. An application thread spawns a limiter thread, and each have access in shared memory to a message count that reflects a number of messages that are transmitted by the application thread within a regulated time period. The limiter thread cycles by entering a sleep state for the regulated time period, resetting the message count upon awakening, and then reentering a sleep state. The application thread executes a loop that compares the message count against a maximum number of messages for the regulated time period; if the comparison is favorable, then another message is transmitted and the message count is adjusted. If the comparison is not favorable, then the application thread enters a sleep state; after awakening, it repeats the comparison, and depending on the result, it transmits a message or reenters a sleep state.

Abstract: Under the present invention, the performance of a set of system resources is monitored in response to incoming request traffic. When a system resource is approaching an overload condition, a corrective action is identified and implemented. Overload thresholds for each system resource and appropriate corrective actions are contained within a management policy. Based on a performance history of the corrective actions, the management policy can be changed/revised.

Abstract: A method and device for identifying degradation in service quality for a wireless media service. The wireless media service has a known expected packet generation rate, which may be determined by the device based upon the codec and payload size selected on initiating the media service. At a receiving device, the packets actually received by the device from the other termination point are counted over a time period, and this number is compared with the number of packets that were expected based upon the known packet generation rate. From this comparison a packet loss rate may be determined. If the packet loss rate exceeds a threshold level, then the device may issue a user alert, terminate the service, or take other action. The threshold level may be established based upon a packet loss rate corresponding to a significant degree of service quality degradation.

Abstract: In a packet communication network in which the minimum guaranteed rate and maximum limiting rate of packet transfer are contracted for each service, this invention classifies flows corresponding to received packets into group 1 to which a flow whose packet transfer rate is less than the minimum guaranteed rate belongs, group 2 to which a flow whose packet transfer rate is equal to or higher than the minimum guaranteed rate and less than the maximum limiting rate belongs, and group 3 to which a flow whose packet transfer rate exceeds the maximum limiting rate belongs.

Abstract: A frame multiplexer includes a plurality of counters each of which is provided for each of the lines. A flow monitoring unit monitors frame flow of each line by referring to the counter of the line, and adds length of a passed frame to a value of the counter. A bandwidth managing unit cyclically selects one of the lines through which a frame is input, and subtracts a predetermined token value from a value of the counter of the selected line. An output control unit stores a frame passed through the flow monitoring unit in a queue buffer, and outputs the frame at an output rate of the frame multiplexer.

Abstract: A method and system for enabling management of a plurality of messages in a communication network is provided. The method includes measuring an in-load and an out-service corresponding to a plurality of switching-nodes in the communication network. The method further includes marking at least one message in a switching-node with an Explicit Congestion Notification (ECN) to form at least one Precise ECN (PECN)-message, if at least one predefined criterion corresponding to a switching-node evaluates to true. Each PECN-message is encoded with measurements of the in-load and the out-service corresponding to the switching-node. Thereafter, one or more management functions are performed to modify egress of the plurality of messages from a source-node. The source-node transmits the plurality of messages to a destination-node through the switching-node.

Abstract: Methods are provided for managing hierarchically organized subscriber profiles. According to one embodiment of the present invention, a subscriber connection is created with a virtual router operable within a telecommunications system of a service provider. A connection request is received from a subscriber of multiple subscribers of the service provider at a subscriber manager of the virtual router. The virtual router maintains a database of hierarchically organized profile identifiers, including multiple lower-level profile identifiers, which explicitly define subscriber services, and multiple first-level profile identifiers, which define service contexts representing combinations of services available to subscribers when connected by (i) explicitly defining the subscriber services or (ii) referring to one or more of the multiple lower-level profile identifiers.

Abstract: A method and system for analysing and measuring multiple sources of data over a communications network (18) so as to ascertain information or usage of one or more resources, such as resource servers (2). A data collection and processing means (20) collects and processes the data sources which are forwarded to a reporting server (34) as a combined data source made available to interested parties.

Abstract: A method for programming the delay for a node in a communication system is disclosed. The node receives a selected delay value and a signal path delay value indicating a delay for signals communicated to the node. The signal path delay comprises an aggregation of transport delays calculated by each node for segments of the communication system between the node and a host node. The method further calculates an additional delay necessary to meet the selected delay value.

Abstract: This invention relates to a method and device for realizing content flowing continuously on P2P network, which is used for dividing the content to be transmitted into a plurality of blocks; detects connection state of all nodes performing the content transmission, calculates an upload rate coefficient of each node, determines the selected upload rate coefficient according to the upload rate coefficient, and determines a transmission rate of the content stream and the number of the content stream transmitted by a content source, the content source distributes the content blocks being able to be transmitted by each node proportionally according to the selected upload rate coefficient of each node; and transmits the distributed content blocks to the corresponding nodes respectively, and controls the node to re-transmit the received content block to other nodes. The present invention can utilize the resource more reasonably and fully.

Abstract: The invention concerns a method for the rate regulation of radio link probing in a communication network comprising at least a receiver terminal and at least one transmitter terminal, characterized by the steps, at the level of the receiver terminal, of: determining the amount of data sent by each transmitter terminal to the receiver terminal through respective radio links, when a probing of a link is to be made, probing the link corresponding to the transmitter terminal having sent the greatest amount of data.

Abstract: In a communication method for performing data communication between communication devices via a network according to a predetermined mode, an attempt to establish the data communication according to a first communication mode is made. When the attempt has failed, another attempt to establish the data communication according to a second communication mode is made.

Abstract: A call admission control technique allowing flexible and reliable call admissions at an ATM switch in the case of an ATM network including both QoS-specified and QoS-unspecified virtual connections is disclosed. In the case where a QoS (Quality of Service) specified connection request occurs, an estimated bandwidth is calculated which is to be assigned to an existing QoS-unspecified traffic on the link associated with the QoS-specified connection request. A call control processor of the ATM switch determines whether the QoS-specified connection request is accepted, depending on whether a requested bandwidth is smaller than an available bandwidth that is obtained by subtracting an assigned bandwidth and the estimated bandwidth from a full bandwidth of the link.

Abstract: A wireless network having control plane segregation is described herein. In one embodiment, an exemplary network architecture includes, but is not limited to, multiple access points coupled to a wired network, where each of the access points is capable of communicating with one or more mobile nodes over a wireless network. The exemplary network architecture further includes a controller coupled to the access points over the wired network, where the controller maintains network traffic information of the wireless network and communicates the network traffic information with the access points to enable the access points to cooperate with each other to provide network services to the one or more mobile nodes over the wireless network. Other methods and apparatuses are also described.

Abstract: A method is disclosed including: measuring sending amounts of packet data that are input from each of ports providing minimum bandwidth guarantee type and best-effort type communication service; calculating statistical information corresponding to an accounting subject time period of the sending amounts of the packet data of the best-effort bandwidth of each of the ports, based on the result of the measurement; changing a value of a peak information rate of a port sending out more of the packet data at a contracted communication rate to be low based on the statistical information; and impartially allocating the best-effort bandwidth to each of the ports based on the value of the peak information rate and a minimum bandwidth guarantee rate.

Abstract: A method and circuit for testing phase interpolators is provided. The method performs a sweep over a phase interpolator delay range and detects if the phase interpolators experience an unacceptably large non-linearity which leads to inaccurate clock timing. The testing circuit implementing this technique uses a phase detector to detect a fault, and in one embodiment, an additional phase interpolator is added as well.

Abstract: A communication network is operated by monitoring a bandwidth utilization of a shared network resource, performing a statistical analysis to determine a mean utilization peak and/or a utilization peak coefficient of variance, monitoring a bandwidth utilization of lines, ports, and/or channels associated with the shared network resource, performing a statistical analysis to determine a percentage M of the lines, ports, and/or channels whose consumption of bandwidth exceeds a first threshold percentage of the mean utilization peak, and determining whether to groom traffic carried by the shared network resource based on the mean utilization peak, the utilization peak coefficient of variance, and/or the percentage M.

Abstract: A communication terminal apparatus, communication system, communication method, and program are provided that enable a decoding section of a mobile communication apparatus to be controlled and operated only when necessary even when receive data retransmission occurs.

Abstract: An object is to transmit data such that the transmission speed is not reduced even in a transmission route with a comparatively high percentage of packet loss. The transmitter 1 comprises: a data transmission unit 11 which transmits data packets 50 comprising data, a data sequence number indicating the order of the data, and a transmission sequence number indicating the transmission order, and which receives acknowledgement packets 60 comprising the next data sequence number, a bit string indicating the reception status, and a received transmission sequence number; a transmission history memory unit 14 which memorizes the transmission history of the data packets transmitted by the data transmission unit 11; and a retransmission control unit 12 which refers to the transmission history memory unit 14 and specifies the data sequence numbers requiring retransmission based on the received acknowledgement packets 60, and which directs the data transmission unit 11 to retransmit.

Abstract: In one embodiment, a method includes requesting accelerated delivery of a specified media stream. The media stream contains a plurality of video frames. The method also includes receiving a response to the accelerated delivery request and selecting, based on the response, a source media stream. The method also includes receiving the source media stream into a buffer and decoding the received media stream from the buffer, at a selected playout rate.

Abstract: The present invention sets forth a method for performing packet combined scheduling of dedicated transport channels for packet services in UMTS downlinks, comprising the following steps: a) prior to each DCH scheduling period, performing pre-selection processing of a transport format combination of each DPCH according to the predetermined restriction conditions for the DCH combined packet scheduling, so as to determine a usable transport format combination set for each DPCH; b) restricting a total downlink transmit power of DCHs for NRT packet services to a schedulable power not exceeding a schedulable power value in the estimation of a total downlink power during said scheduling period; c) based on the fairness of DCH transportation and the QoS requirements of the DCH-borne services, determining weighted values which the respective DCHs correspond to in the optimization of the DCH combined packet scheduling; and d) based on the results of steps a), b), and c), calculating the maximum number of bits which eac

Abstract: Methods are provided for managing hierarchically organized subscriber profiles. According to one embodiment, subscriber services are modified without requiring a change to the subscriber's first-level profile identifier and without requiring the subscriber to reestablish a connection with the service provider. A database of hierarchically organized profile identifiers, including multiple lower-level profile identifiers, explicitly defining subscriber services, and multiple first-level profile identifiers, defining service contexts representing combinations of services available to subscribers by (i) explicitly defining the subscriber services or (ii) referring to one or more of the lower-level profile identifiers, are maintained within a virtual router operable within a telecommunications system of the service provider. Updated service profile information, representing a change to the subscriber's service context, is received.

Abstract: Detecting anomalous network activity through transformation of a terrain is disclosed. A set of network properties is mapped into a multidimensional terrain. The terrain is transformed into an observation domain in which data events of interest are amplified relative to other data comprising the terrain. The transformed terrain is evaluated for anomalous network activity.

Abstract: Apparatus are provided for managing hierarchically organized subscriber profiles. According to one embodiment, a router includes a subscriber manager, a database and a virtual interface. The subscriber manager is operable to receive a connection request from a subscriber of a service provider. The database has stored therein hierarchically organized profile identifiers, including multiple lower-level profile identifiers, which explicitly define subscriber services, and multiple first-level profile identifiers, which define service contexts representing combinations of services available to subscribers when connected to the service provider by (i) explicitly defining the subscriber services or (ii) referring to one or more of the plurality of lower-level profile identifiers.