Abstract: In a networked system having a protected central server network connected to one or more satellite servers, the central server includes master data, and each satellite system includes replicated data derived from the master data. A corruption of at least a portion of the replicated data in one of the satellite servers is determined. Responsive to determining the corruption, at least the corrupted portion of the replicated data is replaced in the satellite server with data derived from the master data of the central server.

Abstract: A technique protects against the failure of a border router between two domains in a computer network using Fast Reroute and backup tunnels. According to the technique, the protected border router advertises a list of all its adjacent next-hop routers (i.e., its “neighbors”). A neighbor in the first domain that is immediately upstream to the protected border router and that is configured to protect the border router (i.e., the “protecting router”) selects a neighbor in a second domain (i.e., a “next-next-hop,” NNHOP) to act as a “merge point” of all the NNHOPs of that domain. The protecting router calculates a backup tunnel to the merge point that excludes the protected border router and associates the backup tunnel with all “protected prefixes.” The merge point then “stitches” additional backup tunnels onto the backup tunnel to provide a stitched tunnel to each remaining NNHOP.

Abstract: A technique incorporates an efficient means for avoiding micro-loops on a backup path associated with a failed protected link. An intermediate node delays updating a forwarding database (FDB) contained in the intermediate node based on the intermediate node's distance from the failed link. Specifically, intermediate nodes near the failed protected link delay updating their FDBs for a longer period of time than nodes farther away from the failed link. By updating FDBs in this manner, micro-loops may be avoided on the failed link's backup path as nodes on the backup path that are close to the failed link do not update their FDBs ahead of nodes farther away on the backup path.

Abstract: Setting up a group of virtual circuits using a single set up message request. In an embodiment, fewer than all of the virtual circuits in the group are immediately provisioned, and the remaining virtual circuits are placed in an inactive status by appropriate configuration of all the devices in the path of the group of virtual circuits. Each of the inactive virtual circuits can be activated (complete provisioning) as and when required. The bandwidth overhead on the networks is reduced as fewer signaling messages would be used in provisioning several virtual circuits. The parsing overhead is reduced on the devices processing the signaling messages as a result.

Abstract: According to the present invention, there is provided a method for controlling congestion in a communications network, the method including receiving congestion feedback data relating to said network, adjusting at least one of a window limit and a rate limit based on said congestion feedback data and injecting data packets onto said network according to said window limit and said rate limit.

Abstract: A method and system for optimizing bandwidth allocation in a fiber channel network having a fiber channel switch element, is provided. The switch element includes, a port control module having a receive and transmit segment, wherein the transmit segment is programmed to block frame transmission from a particular frame source port for a certain duration based on a programmable threshold value. The method includes, enabling a bandwidth limitation counter; and programming the threshold value for blocking frame transmission from a frame source port for a certain duration and during this duration, other source ports may be chosen for frame transmission. After a frame is transmitted from a source port, a tag valid blocking from the same source port is used to block frame transmission. A quality of service register is used to store the threshold value and the threshold value is programmable.

Abstract: A call admission method and apparatus are disclosed which maximizes the wireless channel utilization subject to a predetermined bound on the call dropping and packet loss probabilities for variable-bit-rate traffic in a packet switched network. The call admission scheme is stochastic and dynamic, hence it is able to adapt to a wide range of traffic fluctuations and mobility patterns. The call admission scheme disclosed satisfies a set of constraints on call dropping and packet loss probabilities while maintaining high bandwidth utilization.

Abstract: A method of measuring jitter of a packet flow includes identifying the data packet flow at each of a first and second network locations by analyzing the data fields of each of the packets in the flow. The method associates a transmit time code with each packet transmitted from the first location, and associates a receive time code with each packet received at the second location. The method calculates inter-arrival times for consecutive pairs of packets by (i) subtracting the transmit time code of the first packet from the transmit time code of the second packet, (ii) subtracting the receive time code associated with the first packet from the receive time code associated with the second packet, and (iii) subtracting the results. The method includes calculating a jitter value as a smoothed version of two or more inter-arrival times, smoothed over a predetermined number of pairs of consecutive packets.

Abstract: Various embodiments are described to adaptively use a transmit opportunity. A wireless system comprising a memory and a processor is described. The processor is coupled to the memory. In one embodiment, the processor allocates a first portion of a transmit opportunity for an initial data burst and the processor allocates a second portion of the transmit opportunity for other operations including retries.

Abstract: A flow manager may receive packet flow rules from one or more network services and may generate a unified rule set according to the received packet flow rules. A flow manager may additionally split the unified rule set into subsets for enforcement by one or more flow enforcement devices and may install the rule subsets onto the flow enforcement devices. When splitting the unified rule set into subsets, a flow manager may analyze a network topology connecting the flow enforcement devices. A flow manager may also receive additional packet flow rules, integrate them into the unified rule set, update the rule subsets according to the additional rules, and install the updated subsets onto the flow enforcement devices.

Abstract: A computer implemented method for receiving data from a sender across a network connection for the data transfer. An expected size for a congestion window for the sender is identified. An amount of the data received from the sender is tracked. An acknowledgment is sent in response to the amount of data received from the sender meet in the expected size of the congestion window for the sender.

Abstract: A method and a signaling node for reducing signaling during call setup in a communication network. The signaling node is an intermediate node on a signaling path between an origination node and a destination node. When a call setup delay is experienced, the intermediate node receives a first excessive delay indication signal from the destination node and forwards the signal to the origination node. A timer for supervising excessive delay indication signals is then started in the intermediate node. Prior to expiration of the timer, additional excessive delay indication signals received from the destination node are not forwarded. After expiration of the timer, the intermediate node sends a single excessive delay indication signal to the origination node.

Abstract: The present invention provides a system and method for evaluating the performance of a potential route before it is actually established. In a wireless network, when a trigger is received by a source node that suggests the existence of a better route, the source node sends a scouting packet along the suggested route. The scouting packet collects statistics related to the suggested route, without establishing the route while the scouting packet traverses the route. The metric for the suggested route, which is derived from the statistics collected by the scouting packet, is compared to the metric for the current route. If the metric for the suggested route is preferable to that of the current route, the suggested route is established as a new route.

Abstract: A system (100) can update a network performance counter and include link layer (MAC blocks) devices (102-0 to 102-N) coupled in a daisy chain manner. A single performance counter (104) can serve all of the link layer devices (102-0 to 102-N), receiving statistics vectors from all link layer devices (102-0 to 102-N) and a vector enable signal from a last link layer device 102-N in the chain. A method (1200) for updating a performance counter according to such a daisy chain configuration is also disclosed.

Abstract: Disclosed is a method for reporting channel state information between a mobile station and a base station to the base station by the mobile station in a mobile communication system. The method includes the steps of mapping the channel state information to a value stored in a channel state information table. The mapping is determined by a range of traffic-to-pilot ratio (TPR) values. The TPR values are determined according to an encoder packet site packet data rate relation. The mapping is then transmitted to the base station.

Abstract: Methods, apparatuses, and systems are presented for compensating for independent clocks in relayed modem communications involving receiving data packets from a first network device, forwarded over a packet-based network, at a second network device, the data packets representing data in a first modulated signal from a first modem, the first modulated signal being associated with a first symbol rate, placing data derived from the data packets into a queue in the second network device, generating a second modulated signal at the second network device for transmission to a second modem, the second modulated signal being generated using data retrieved from the queue and being associated with a second symbol rate, obtaining at least one queue size measurement associated with data in the queue, and effectively adjusting the second symbol rate based on at least one queue size measurement associated with data placed in the queue in the second network device.

Abstract: A bridge operates in either VLAN aware mode or VLAN unaware mode as specified by a user. A packet is received in a priority tagged format containing an associated VLAN identifier. The packet is processed according to a VLAN aware mode by setting said VLAN identifier equal an identifier associated with the incoming port on which said packet is received An address table is searched using a destination address and the VLAN identifier to determine a destination port. The packet is sent to the determined destination port.

Abstract: In accordance with the present invention is provided, a method to assure node connectivity in an ad hoc wireless network comprising a wireless main controller, a plurality of wireless nodes having a plurality of neighboring nodes and a plurality of wireless links connecting the wireless main controller, the plurality of wireless nodes and the plurality of neighboring nodes. The proposed method includes, computing a composite threshold for each of a plurality of neighboring nodes of a plurality of nodes, assigning a mobility to each of the plurality of nodes based on the composite threshold for each of the plurality of neighboring node and using the mobility assigned to each of the plurality of nodes to assure node connectivity in the ad hoc network.

Abstract: Principles of the invention are directed to techniques for allowing a router forwarding packets within a computer network to perform two or more forwarding tree decisions per memory access. The router may implement forwarding information in the form of a radix tree having a number of nodes, and received packets may contain keys identifying a packet destination. The router may traverse the tree by testing two or more path control bits within the key per each of the traversed nodes. The values of the path control bits in the key determine the path traversed along the tree. The router also stores intermediate bit patterns at each node and tests intermediate bits in the key to determine whether a particular node is the best match to the routing prefix contained in the key, thereby eliminating a need to backtrack up the tree.

Abstract: A system and method for enabling a zero configuration nomadic wireless and wired computing environment presenting a just works experience is presented. The system examines predefined user preference or profile settings to determine to which of a competing number of wireless networks available it should connect, and what type of authentication should be used for such connection. Nomadic wireless computing between infrastructure wireless networks and ad hoc wireless networks may be accomplished without further user intervention required in an auto mode. Also, both infrastructure only and ad hoc only modes are available through the system of the invention. Further, the user may set a preference for infrastructure or ad hoc modes in the auto mode. With an infrastructure mode preference set, the system will automatically detect and transfer connectivity to a newly available infrastructure wireless network if the user was previously operating off-line or in ad hoc mode.

Abstract: A method of and apparatus for communicating between a host and an agent. According to an embodiment of the invention a method for communicating data between a host and an agent is described. The method includes performing a first transaction at a first time between a host and a hub. The method then includes performing a second transaction between the hub and an agent. The method then includes performing the first transaction at a second time between the host and the hub. The second transaction is based on the first transaction for the second time.

Abstract: A single chip integrated circuit wireless data processor demodulates N separate data signals from M separate antennas simultaneously. The multi-antenna processor can be coupled to a baseband processor on the IC, so that it responds to changing channel conditions between two access points, and selectively kicks in if there is noise, interference, frequency fading, a need for an enhanced data rate, a need for an increased operating range, etc. to improve a performance of the baseband processor.

Abstract: Event driven methods for implementing or removing a filter used in receiving a multicast transmission are disclosed. An exemplary method for implementing a filter includes: detecting a message, such as an IPv6 MLD message, wherein the message comprises an address of a multicast group and a request to join the multicast group to receive a multicast transmission; in response to detecting the message, determining a filter parameter (e.g., a PID number and/or MAC address) needed to receive the multicast transmission; and implementing the filter parameter to receive the multicast transmission. Alternative methods wherein filter implementation or removal is based on the detection of direct procedure calls, such as a Setsockopt call, are also disclosed.

Abstract: The present invention provides a method and apparatus for multicast tunneling for mobile devices. The method comprises receiving a multicast packet directed to a plurality of mobile nodes, the mobile nodes being associated with a home subnet and identifying if any of the plurality of the mobile nodes are coupled to a subnet other than the home subnet, wherein each of the identified mobile nodes has an associated transmission path through which that mobile node can be reached. The method further provides that in response to determining that at least some of the mobile nodes are coupled to the subnet other than the home subnet, determining which of the identified mobile nodes has a common next hop in their associated transmission path and generating a packet including at least a portion of the multicast packet and including in the packet a list of mobile nodes that have the common next hop. The method further provides for transmitting the generated packet to the common next hop.

Abstract: Disclosed is an uplink random access procedure in an NB-TDD (Narrow Band Time Division Duplexing) system. To achieve an acknowledgement for data transmission from a UTRAN (UMTS Terrestrial Radio Access Network), a UE selects one of a plurality of sync codes by which the UTRAN identifies UEs that request data transmission and transmits the selected sync code in a time slot of a sub-frame to the UTRAN. Then, the UE receives the sync code information, information about the arrival time of the sync code, time update information indicating a variation in the transmission time of data, and power information indicating an adjustment to a power gain in the UE from the UTRAN on an FPACH (Fast Physical Access Channel). The UE transmits the data on a P-RACH (Physical Random Access Channel) mapped from the FPACH according to the time update information and the power information.

Abstract: A communication system, method and apparatus which can maintain favorable communication quality without imposing much burden upon a user. A plurality of communication networks are formed between first and second communication apparatus. Upon starting communication between the first and second apparatus, communication quality of the communication networks is measured using at least one of the communication apparatus. One of the communication apparatus is selected for communication based on a result of the measurement. The first and second apparatus may be a base apparatus and a portable terminal apparatus, respectively, for use in the home, in which the base apparatus receives a television broadcast and transmits a selected television program of the broadcast to the terminal apparatus for display thereon. The communication networks may include a radio network and a wireline network. The terminal apparatus may also be adapted to access the Internet via the base apparatus.

Abstract: Routing data packets to a mobile node includes registering a mobile node with a home agent associated with the mobile node. The home agent establishes that the mobile node has moved from a first network to a second network, and determines a foreign access router of the second network, where the mobile node communicates through the foreign access router. A mobility binding table is updated with a binding entry associated with the foreign access router. Data packets destined for the mobile node are forwarded to the mobile node in accordance with the updated mobility binding table.

Abstract: A base station for use in a point-to-multipoint wireless network. The base station transmits downstream data packets in a downstream traffic channel to customer premises equipment (CPE) devices and receives upstream data packets in an upstream traffic channel from the CPE devices. The base station determines queue status of at least one queue associated with at least one application in each of the CPE devices and, in response to the determination, the base station re-allocates bandwidth from a first queue associated with a first CPE device to a second queue.

Abstract: A system and method of routing calls made to a called party Subscriber Universal Destination Identifier (SUDI) in a wireless communications network is provided. The method includes determining the call type, selecting a call-type-specific destination identifier for the call from a plurality of called party destination identifiers based on the call type, and routing the call to the called party using the selected call-type-specific destination identifier. The step of determining the call type can include determining the call protocol, determining the media type, and determining the call type from the call protocol and the media type. The system includes functionality for determining the call type, selecting a call-type-specific destination identifier for the call from a plurality of called party destination identifiers based on the call type, and routing the call to the called party using the selected call-type-specific destination identifier.

Abstract: A method for performing reverse link power control by determining the state of a reverse link data rate control bit in a mobile station according to variable thresholds that are set according to the size of a data packet to be transmitted. By considering the size of the data packet to be transmitted when setting the thresholds used to determine the state of the rate control bit, the increased sensitivity at higher data packet sizes of system stability to an incorrect determination of the state of the rate control bit may be accommodated. Furthermore, when a mobile station is located within a soft handoff area, the number of base stations transmitting rate control bits to the mobile station is considered when setting the variable thresholds.

Abstract: A system and method for test loop timer operation. A mobile station implementing a test procedure may receive a command to enter a test mode. A timer may be enabled and RLC data blocks may be transmitted. The timer may be disabled when a quantity of the RLC data blocks exceeds a transmit window size or when a countdown value is equal to zero. The the test mode may be a switched radio block loopback mode and the timer may be a T3182 timer. Embodiments of the invention may be implemented in a mobile communication system.

Abstract: A QoS setup method comprises the steps of a mobile node MN recognizing a first QoS setup request when an opposite correspondent node CN makes the first QoS setup request for its route to the home address HoA of the mobile node MN, the mobile node MN making a second QoS setup request, and establishing the second QoS setup for a route between the home address HoA and Care-of Address CoA of the mobile node MN. This method makes it possible to carry out QoS setup for a section to a moved-to place of a mobile node MN in response to a QoS setup request from an opposite correspondent node CN, even if the correspondent node CN and mobile node do not have a function of route optimization.

Abstract: A system and method comprise a spectrum selector, an unlicensed transceiver, and a licensed transceiver. The spectrum selector determines whether communications will be transmitted over unlicensed spectrum or licensed spectrum. Based upon the determination, the spectrum selector transmits the communications to the unlicensed transceiver or the licensed transceiver. In addition, the spectrum selector may transmit a first portion of the communications to the unlicensed transceiver and a second portion of the communications to the licensed transceiver. On the receiving side, the spectrum selector monitors the unlicensed transceiver and the licensed transceiver, receives the communications from the licensed transceiver and/or the unlicensed transceiver, and transmits the communications to an access device. The unlicensed transceiver transmits and/or receives communications over unlicensed spectrum. The licensed transceiver transmits and/or receives communications over licensed spectrum.

Abstract: A non-complex low cost communication, navigation and identification system and method for use with moveable or stationery objects on the same frequency without interference. The present invention listens before each transmission and transmits only when there are no other protocols transmitting, thus avoiding communication collisions and supporting high channel load scenarios.

Abstract: The present invention provides a method and an apparatus for communicating data over a network between a communication node, for example, an access point having a first and a second antenna and a first and a second mobile station. The method comprises weighting a first data at the access point to transmit the first data using the first and second antennas so that the first mobile station only receives the first data and weighting a second data at the access point to transmit the second data using the first and second antennas so that the second mobile station only receives the second data. A space division multiple access (SDMA) module may cause a transmission protocol to transmit the first data to the first mobile station on the downlink and transmit the second data to the second mobile station in parallel to the transmission of the first data on the downlink.

Abstract: Provides apparatus, systems and methods for adapting a first and second transmission parameter R, P in a transmitting node of a data communication system to the current link quality of a data communication channel. A method comprises in the transmitting node counting the number of successful transmissions s, each successful transmission bases on a receipt of an acknowledgment “ACK”, and comparing the number of successful transmissions s against a threshold value Smax. In the event of reaching the threshold value Smax and operating with the first and second transmission parameter R, P in a predetermined parameter space, the method further comprises adapting at least one of the first and second transmission parameters R, P in dependence on a critical value that due to the current link quality corresponds to a temporarily unsupported value of one of the first and second transmission parameters R, P.

Abstract: A system and method for wireless communication is disclosed. In one embodiment of a method, a user of a wireless device initiates a communication session during which a wireless data session can be triggered from a voice session and a voice session can be triggered from a wireless data session. During the communication session, data is shared between the wireless data channel and the voice channel.

Abstract: A method, system and transmitting side protocol entity is disclosed for sending packet data units for unacknowledged mode services in a mobile communication network. A retransmission parameter is set to a desired value in order to prevent retransmission of packet data units in a handover situation. The transmitting side acknowledged mode radio link control entity purges from the retransmission buffer based on status reports from a user equipment. The packet data units that have been acknowledged by user equipment. A status report includes the sequence number of the highest packet data unit expected by the user equipment, and therefore the status report indicates the sequence number of the radio link control packet data units that have been received at the user equipment (either correctly or incorrectly). All the remaining packet data units in the retransmission buffer are scheduled for transmission and transmitted to the new node.

Abstract: In order to accomplish efficient communication of data between a base station and a plurality of mobile terminals, particular orthogonal codes are transmitted from the mobile stations to the base station as alert signals indicating the presence of data to be transmitted. The base station checks whether particular orthogonal codes are contained in the alert signals, and when the particular orthogonal codes are detected in the alert signals, information representing the detected orthogonal codes and the schedules for transmitting the data from the mobile terminals to the base station are transmitted from the base station to the mobile terminals as an alert response to the alert signals.

Abstract: A wireless network base station in communication with a mobile station enables the use of the reduced slot cycle mode by the mobile station. The base station comprises a reduced slot cycle controller that causes the base station to transmit an enhanced release order message to the mobile station to transition the mobile station from a traffic state to an idle state. The enhanced release order message comprises a first data field containing a first reduced slot cycle index (SCI) value to be used by the mobile station.

Abstract: A control channel supporting traffic control in epochs is divided into two control subchannels each being less than or equal to about a half epoch in duration and occurring serially in time. Slot allocation data may be transmitted and received independently over the subchannels. One subchannel may be used for transmitting forward slot allocation data and the other subchannel may be used for transmitting reverse slot allocation data. The channel split into two subchannels may be a paging channel. The forward and reverse slot allocation data may be transmitted between a base station processor and field unit. Forward and reverse traffic data may be staggered by at least about half an epoch. Transmission of traffic data happens within about two epochs after the assignments.

Abstract: A virtual channel communications system assigns RF resources to communications waveforms for transmitting and receiving signals. The communications system comprises universal transceivers for generating and processing the signals. The universal transceivers comprise translators for translating baseband transmit signals to RF transmit signals and RF receive signals to baseband receive signals and digital signal processors for generating the communications waveforms and processing baseband receive and transmit signals. An inter-transceiver communications bus connected to the translators and the digital signal processors communicates between the universal transceivers. The communications bus interconnects digital signal processors in any universal transceiver to a translator in any universal transceiver. Universal power amplifiers are connected to the universal transceivers to amplify the RF transmit signals.

Abstract: The present invention discloses a method for preventing hanging resources in connection with an SRNS Relocation Procedure and/or a Routing Area Update Procedure for a terminal roaming in a UMTS or a GPRS network. According to a first aspect of the present invention, when the SGSN from which a terminal is roaming detects a fault after the Relocation Command in the SRNS Relocation Procedure, a Relocation Cancel Procedure also involving any involved GGSN is initiated. According to a second aspect of the present invention, a timer is started in the SGSN to which the terminal is roaming when the Forward Relocation Request in the Routing Area Update Procedure is received. If this SGSN does not receive a Routing Area Update Request within a predefined time period, the SGSN initiate a clean up of the resources that have been occupied during the procedures towards the involved nodes.

Abstract: A routing method in an ad hoc network formed by a plurality of mobile terminals includes receiving, at a mobile terminal forming part of the ad hoc network, a packet generated by an adjacent terminal, and determining, at the mobile terminal, whether to relay the received packet or not, based on presence or absence of a record of packet relaying by the adjacent terminal.

Abstract: Techniques for sending routing data include sending first routing data in a first multicast packet to a number N of adjacent nodes. It is determined whether different routing data is ready to be sent in a different multicast packet. If so, then a number M of adjacent nodes from which acknowledgment messages have been received, and whether M exceeds a threshold, is determined. If so, then a Conditional-Receive (CR) method is invoked in which a multicast message is sent which identifies each of a number L=N?M of laggard adjacent nodes. The laggard adjacent nodes are thus notified to ignore the different multicast packet. If it is determined that M does not exceed the threshold, then additional acknowledgement messages are received while waiting until M does exceed the threshold before the CR method is invoked. The threshold is greater than or equal to 1.

Abstract: An asynchronous mobile communication terminal for setting present time. A memory stores information of a time information server providing present time information location by location. A communicator performs communication with the time information server through a base station providing present location information. A time setting module carries out an update operation based on the location information provided from the base station and the time information provided from the time information server corresponding to the location information and sets the present time. A controller receives the location information from the base station, sends a request for time information corresponding to the location information to the time information server through the communicator, and controls the time setting module so that the update operation can be carried out using the location information and the time information provided from the time information server corresponding to the location information.

Abstract: A wireless communication system controls wireless communications over a shared wireless link. The wireless communication system transfers first credits to a first wireless communication device at a first credit transmission rate. The wireless communication system transfers second credits to a second wireless communication device at a second credit transmission rate. The first credits indicate first time periods for the first wireless communication device to use the shared wireless link. The second credits indicate second time periods for the second wireless communication device to use the shared wireless link. The wireless communication system changes the first credit transmission rate and changes the second credit transmission rate. In some examples, the wireless communication system changes the first credit transmission rate and the second credit transmission rate in response to collisions on the shared wireless link.

Abstract: In one embodiment, the present invention includes a slot in a repeating time division frame with a first training sequence, an information sequence after the first training sequence, and a second training sequence after the information sequence. In some embodiments either the first or the second training sequences indicates a type for the information sequence, such as a random access channel message and a traffic channel message, a configuration message, a channel assignment message, or a data traffic message.

Abstract: Various embodiments are described to address the need for reduced handoff delays associated with inter-AN (access network) HRPD (High Rate Packet Data)/1XEV-DO handoffs. The disclosed approach enables an AT (101) with an active packet data session to perform a hard handoff from a source AN (121, 221) to a target AN (122, 222) without having to force the data session dormant. Unlike known hard handoff approaches that involve coordination by a mobile switching center (MSC), the disclosed approach uses peer-to-peer signaling with no MSC involvement, such as that between source and target ANs or PCFs (131, 132, 231, 232). For example, data session information at the source side is transferred via new A13 messaging to the source entity's target-side peer to otherwise reduce signaling between the source and target equipment.

Abstract: A time adjustment method, a time stamping method and a telecommunication system are provided. The invention is based on performing a power measurement in the base station on a signal generated in the base station, and providing the signal with time characteristics proportional to a time reference received in the base station. Embodiments of the invention enable accurate synchronization of a base station and precise positioning of mobile stations.