Abstract: A digital payload for processing a sub-band spectrum received on an uplink beam at a communications satellite includes a digital channelizer, a digital switch matrix and a digital combiner. The digital channelizer divides the sub-band spectrum into a plurality of frequency slices that can be routed by the digital switch matrix to any of a number of receiving ports. A digital combiner receives the frequency slices and re-assembles them to form one or more output sub-bands for transmission on an output beam of the communications satellite. The digital payload may also include an embeddable digital regeneration module configured to demodulate some or all of the sub-band spectrum to extract a digital bitstream therefrom. The digital bitstream may be processed to implement code-based multiplexing, switching, access control, and other features.

Abstract: Provided are methods and systems of using division-free duplexing (DFD) in a cable communication network. Techniques for applying DFD in a cable communication network may enable data to be transmitted and received over a coaxial cable without using division duplexing techniques. For example, the cable communication network may include DFD enabled network nodes and each subscriber to the cable network may be equipped with a DFD system configured to operate in a DFD mode. In some embodiments, oppositely propagating signals may be transmitted over one frequency channel, and DFD techniques may be used to recover originally transmitted signals. Further, in some embodiments, DFD techniques may be used with encryption methods to increase the security of data transmitted in the cable communication network.

Abstract: The present invention provides a method for avoiding interference resulting from data transmission between an adjacent second base station and a second relay station placed within the coverage of the adjacent second base station.

Abstract: In an information processing system in which a plurality of modules are connected to a ring bus, data transfer efficiency is enhanced by deleting an unnecessary packet from the ring bus. This invention relates to an information processing system in which a plurality of modules that execute data processing are connected to a ring bus. More particularly, this invention relates to a ring bus operation technique that allows efficient data transfer by monitoring a flag of a packet, and removing an unnecessary packet from the ring bus.

Abstract: A management computer has: a storage unit in which a route information indicating a transfer route of frames in the communication network is stored; and a monitoring unit. The monitoring unit refers to the route information to transmit a frame to the transfer route and performs identification processing that identifies a location of a failure on the transfer route. First to N-th nodes (N is an integer equal to or more than 3) line up in order along the transfer route. The i-th node (i=1 to N?1) forwards a received frame to the (i+1)-th node, and the N-th node forwards a received frame to the management computer. In the identification processing, the monitoring unit sets at least one node between the first node and the N-th node as an insertion node. Then, the monitoring unit transmits a frame to the insertion node each, and identifies the location of the failure based on reception state of a frame from the N-th node.

Abstract: A diagnostic apparatus including a signal analyzer and a throughput projector for diagnosing a wireless home network. The signal analyzer analyzes wireless communication parameters at identifiable locations within a coverage area associated with the wireless home network. The throughput projector projects wireless throughput levels for at least one proposed wireless device differing in communication capabilities from the diagnostic apparatus at each of the identifiable locations, based on the communication parameters analyzed by the signal analyzer together with parameters which identify relative differences in communication capabilities of the diagnostic apparatus and the at least one proposed wireless device.

Abstract: Provided is a test apparatus that tests a device under test, comprising: a plurality of channels that output and receive signals to and from the device under test; a generating section that generates a packet data sequence transmitted to and from the device under test; and a channel selecting section that selects which of the channels is used to transmit the packet data sequence generated by the generating section.

Abstract: A timer for processing data blocks is proposed for a receiver of a mobile communications system. If the timer is not running, the timer is started based a data block. The data block has a sequence number higher than a sequence number of another data block that was first expected to be received. If the timer is stopped or expires, the timer is based on a highest sequence number of a data block among data blocks that cannot be delivered to a higher entity. The timer can be used to prevent a stall condition in mobile communications.

Abstract: A first communication node communicates by multiple-input-multiple-output (MIMO) wireless communications with a second communication node of a wireless communication system. The method includes receiving a Sounding Reference Signal (SRS) over a plurality of subcarriers transmitted by the second communication node for MIMO communications. Channel quality is measured responsive to the sounding reference signal to output a first channel quality value. A demodulation reference signal is received over a plurality of subcarriers transmitted by the second communication node for MIMO communications. Channel quality is measured responsive to the demodulation reference signal to output a second channel quality value. Reliability of the measurements of the first channel quality value and the second channel quality value is determined. The first and second channel quality values are combined while compensating for the determined reliability difference between the measurements to generate a combined channel quality value.

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives downlink data from a base station via a downlink resource, sends the downlink data to a user equipment (UE) via an uplink resource, receives uplink data from the UE via the uplink resource, and sends the uplink data to the base station via the uplink resource. The apparatus also determines at least one of an observed downlink signal-to-interference-plus-noise ratio (SINR) or an observed uplink interference. The apparatus then broadcasts a relay availability based on the determination that the at least one of the downlink SINR observed is greater than a first threshold or the uplink interference at the relay is less than a second threshold.

Abstract: Systems and methodologies are described that facilitate providing user plane support for internet protocol (IP) relays. Service data units (SDU) received at a radio communication layer can be provided to an upper communication layer, such as a packet data convergence protocol (PDCP) layer, without regard to sequence numbers. The upper communication layer can handle reordering of the received protocol data units. Since communications related to a plurality of devices through one or more IP relays can be mapped over a single bearer, allowing reordering at the upper communication layer can mitigate delay caused where a donor or other upstream access point is delayed in providing a sequential SDU related to one of a plurality of devices downstream. In this regard, SDUs related to other devices can be processed by the upper communication layer while waiting for the sequential SDU.

Abstract: A light-weight relay selection mechanism selects the most likely “best” relay station for data transmission from a given source station S to an access point AP using the Initial Receive Signal Strength (IRSS) to infer the future data transmission rate. In the initialization stage, the access point AP constructs a table mapping the IRSSs of receivers to eight levels of transmission rate. In the relay selection stage, relay candidates R measure the IRSSs for the source station S and access point AP and report their IRSS levels to the AP. A contention-based mechanism is dedicated to enabling the candidate with higher IRSS levels to report earlier. With this mechanism, the access point AP is able to select the station with the highest estimated data transmission rate.

Abstract: A wireless network printing system and method, the system including: a first wireless terminal to selectively connect to an ad-hoc network, where inter-device communication is directly performed between devices, and an infrastructure network, where inter-device communication is indirectly performed, via an access point (AP); a second wireless terminal to transmit data to the first wireless terminal, via the ad-hoc network; and an image forming device affiliated with the infrastructure network, to print the data, after the data has been relayed through the first wireless terminal.

Abstract: Techniques for receiving reference signals from multiple nodes and determining channel state information (CSI) for the nodes are disclosed. A user equipment (UE) may determine and report CSI for the multiple nodes to support data transmission to the UE. The nodes may transmit reference signals based on different configurations. The configuration for each node may indicate when, where, and how the node transmits its reference signal. The UE may determine CSI for different nodes and/or different combinations of nodes based on the reference signals transmitted by these nodes as well as an indication of which subframes to use to determine each CSI reported by the UE. The UE may report different CSIs for different subframes and may receive data transmission sent by a single node or a combination of nodes based on the reported CSIs.

Abstract: A network-based wireless location system (WLS) is configured to locate mobile devices, or user equipment (UE), wirelessly communicating with a relay node (RN). The RN is wirelessly backhauled to a serving donor enhanced NodeB (donor eNB), and the RN has eNB functionality to communicate with the UE and has UE functionality to communicate data from the UE with the donor eNB. The WLS carries out a method including receiving uplink transmissions from the RN, using the uplink transmissions from the RN to compute a location estimate for the RN, and determining a location estimate for the UE based on the location estimate for the RN.

Abstract: Methods and systems are provided for hardware-accelerated packet multicasting in a virtual routing system. According to one embodiment, a virtual routing engine (VRE) including virtual routing processors and corresponding memory systems are provided. The VRE implements virtual routers (VRs) operable on the virtual routing processors and associated routing contexts utilizing potentially overlapping multicast address spaces resident in the memory systems. Multicasting of multicast flows originated by subscribers of a service provider is simultaneously performed on behalf of the subscribers. A VR is selected to handle multicast packets associated with a multicast flow. A routing context of the VRE is switched to one associated with the VR. A packet of the multicast flow is forwarded to multiple destinations by reading a portion of the packet from a common buffer for each instance of multicasting and applying transform control instructions to the packet for each instance of multicasting.

Abstract: A method and a device for data relay transmission in a wireless relay communication network are provided, in which, the relay station directly obtains corresponding egress CID related information based on input MAC PDUs, then generates output MAC PDUs including the egress CID related information, and at last, according to the egress CID related information, performs QoS scheduling for the output MAC PDUs, so as to output them in an sequence of QoS. The invention omits the steps of de-cascading, de-segmenting or de-capsulating the MAC PDUs in order to obtain MAC SDUs, and the steps of scheduling by category, cascading, segmenting, and encapsulating the MAC SDUs in order to re-generate the MAC PDUs in the prior art, and the invention simplifies the data processing procedure and achieves the goal of decreasing the relay latency.

Abstract: Provided is a method and apparatus for calculating an isolation distance that is a distance where an interference phenomenon does not occur between wireless repeater apparatuses. The isolation distance calculating apparatus may include: an interference signal calculator to calculate a magnitude of an interference signal included in a particular band by detecting a signal of the particular band extracted from a received radio signal of a wireless repeater apparatus; and an isolation distance calculator to calculate a necessary isolation distance for cancelling interference between the wireless repeater apparatus and another wireless repeater apparatus, based on a predetermined allowable interference signal level and the magnitude of the interference signal.

Abstract: A method is implemented in a network that comprises a plurality of ports and an indicator associated with each port. The method comprises forming a frame. The frame passes through the network. The frame causes indicators of multiple ports to illuminate to provide an indication of a path through the network Each of the ports remain illuminated for at least a period of time after the frame passes through each such port to enable a person to concurrently visualize all of the ports comprising the path.

Abstract: Systems and methods for proactive management of a communication network through monitoring a user network interface are disclosed.

Abstract: A data retransmission method, apparatus, and system can improve a success ratio of data packet retransmission. A data retransmission method includes: after a source node continuously transmits at least two data packets to a destination node according to a go-back-N automatic repeat request, monitoring and decoding, by a relay node, the at least two data packets; storing a copy of a successfully decoded data packet; monitoring a response message to each data packet, where the response message is returned by the destination node to the source node; and sending a copy of a data packet that corresponds to a reception negative acknowledgment message to the destination node, when the monitored response message is the reception negative acknowledgment message.

Abstract: A system and method of processing information regarding medical devices in wireless communication with each other is provided in which a handheld device has a first wireless communication link with a first medical device, such as a glucose sensor, and a second wireless communication link with a second medical device, such as an insulin pump. A processor in the handheld device monitors the status of the first and second wireless links and upon noting a change in status of either one, compares the first wireless link status with the second wireless link status and provides guidance for resolving a communication problem based on the comparison. The latency of the medical devices is considered as well as the ability to make system status changes, extend time periods before alarms are issued, and the characteristics of the medical devices are considered.

Abstract: A repeater that facilitates communication in a wireless environment comprises a scheduling component that analyzes a schedule relating to when communications are active in the forward link direction and when communications are active in the reverse link direction, the communications are subject to time division duplexing. An amplifier that amplifies received communications as a function of the schedule. The repeater can further comprise a configuration component that configures the amplifier to amplify the received communications in one or more of a forward link direction and a reverse link direction.

Abstract: A method for relay node related measurements is provided. The method includes the following steps: obtaining air interface related measurements; and forming form the measurements at least one merely relay node related measurement result. The method can facilitate use of relay nodes and guarantee the advantages provided by the relay nodes.

Abstract: A new and improved Ethernet hub for providing visibility of data packet traffic in an Ethernet network is disclosed. The Ethernet hub includes a packet buffer being coupled with a plurality of network ports to enable full duplex data packet communications among connected network stations.

Abstract: A packet relay apparatus includes a first packet processing circuit and a second packet processing circuit. The first packet processing circuit executes, discarding data packets from among data packets, and transferring the rest of the data packets to the second packet processing circuit, counting discard number of the data packets, determining whether or not the discard number is equal to or greater than a threshold and transferring, if the discard number is equal to or greater than the threshold, a discard number information packet including discard number information indicating the discard number to the second packet processing circuit. The second packet processing circuit executes discarding data packets from among the data packets, counting discard number of the data packets and collecting the discard number counted by the second packet processing circuit and the discard number indicated by the discard number information included in the discard number information packet.

Abstract: A Complex Adaptive Phase Discriminator (PD), as presented in some concepts of the present disclosure, is an adaptive filter that accurately estimates the instantaneous frequency of a dynamic complex signal. The PD can demonstrate accurate instantaneous frequency estimation and rapid convergence in dynamic complex signal environments, even when the frequency of its input may change rapidly. A direct PD architecture can estimate the instantaneous frequency of a complex primary signal, iteratively adapting a phase of a complex exponential by minimizing the mean squared error of a complex error signal. Instantaneous frequency can be directly estimated from the phase of the complex exponential. In contrast, an indirect PD architecture can estimate the instantaneous frequency of a complex primary signal, iteratively adapting a complex coefficient by minimizing the mean squared error of a complex error signal. Instantaneous frequency can be indirectly estimated by extracting the phase of the complex coefficient.

Abstract: Methods, devices and systems for improved transmission in a remote node-based wireless communication system is provided. In one embodiment, a method of wireless communication comprises receiving a downlink signal from a first node, demodulating said received downlink signal, generating a channel quality measurement (“CQM”) value of said demodulated downlink signal, determining said CQM value exceeds a first threshold, modulating said demodulated downlink signal to form a processed downlink signal, and cooperatively transmitting said processed downlink signal with said first node to a wireless device.

Abstract: An apparatus and a method for sending a control information for retransmission in a multihop relay wireless communication system are provided. Data received from a lower node is checked for errors. The data is transmitted to an upper node, when the data has no errors. When two or more information, which include at least one of Acknowledgement (ACK) and Negative ACK (NACK) in response to a data reception are received from one or more lower nodes, the two or more information are transmitted to the upper node at the same time. Accordingly, the RS can transmit the control information for the ARQ provided from the lower nodes, to the upper node at the same time.

Abstract: A network-based wireless location system (WLS) is configured to locate mobile devices, or user equipment (UE), wirelessly communicating with a relay node (RN). The RN is wirelessly backhauled to a serving donor enhanced NodeB (donor eNB), and the RN has eNB functionality to communicate with the UE and has UE functionality to communicate data from the UE with the donor eNB. The WLS carries out a method including receiving uplink transmissions from the RN, using the uplink transmissions from the RN to compute a location estimate for the RN, and determining a location estimate for the UE based on the location estimate for the RN.

Abstract: A system to provide narrowcast communications uses adaptive data rate control to individual subscribers such that the effects of precipitation or other link conditions, which are not common to all subscribers, is mitigated. The invention takes advantage of the fact that the narrowcast data consist of packets which are individually addressed to specific subscribers, or groups of subscribers. The narrowcast data is communicated on a plurality of channels, each of potentially differing data rates. The subscribers are assigned a particular channel, based upon their link quality, to receive packets addressed to them. The lower data rate channel will be less affected by adverse link conditions and are hence assigned to subscribers most likely to incur adverse link conditions.

Abstract: A radio relay apparatus 100 used in a radio communication system in which a radio base station 200 transmits abase station preamble signal at a predetermined timing includes a control unit 130 that controls a service-side radio communication unit 120S that performs radio communication with the radio terminal, the base station preamble signal being a radio signal to be used by a radio terminal to establish synchronization. The service-side radio communication unit 120S transmits a relay station preamble signal at a timing different from the predetermined timing, the relay station preamble signal being a radio signal to be used by the radio terminal to establish synchronization. The control unit 130 controls the service-side radio communication unit 120S so that at the predetermined timing, the service-side radio communication unit 120S transmits a preamble mask signal that is a radio signal to disturb the base station preamble signal.

Abstract: Systems and methods for proactive management of a communication network through monitoring a user network interface are disclosed. An example method disclosed herein to proactively monitor user network interfaces comprises obtaining first information related to operation of a physical port, determining that the physical port implements both a first user network interface and a second user network interface, combining the first information with second information related to operation of a first logical port implementing the first user network interface, but not implementing the second user network interface, to assess performance of the first user network interface, and combining the first information with third information related to operation of a second logical port implementing the second user network interface, but not implementing the first user network interface, to assess performance of the second user network interface.

Abstract: A method for performing relay node configuration and re-configuration in relay enhanced networks, in particular in a 3GPP LTE-Advanced architecture, wherein the network includes a plurality of eNBs that function as donor eNBs providing wireless access to associated relay nodes, wherein the relay nodes function as eNBs from a UE perspective, is characterized in that the network is divided into clusters such that each cluster includes exactly one donor eNB and that each relay node is associated to at least one donor eNB any point in time, wherein the load of donor eNBs and the handover rates among relay nodes as well as between donor eNBs and relay nodes are monitored and/or estimated, wherein the association of relay nodes to donor eNBs is performed on the basis of the results of the monitoring and/or estimation. Furthermore, an apparatus for performing centralized relay node configuration in relay enhanced networks is disclosed.

Abstract: At least one timer is used to prevent a stall condition. If a timer is not active, the timer is started for a data block that is correctly received. The data block has a sequence number higher than a sequence number of another data block that was first expected to be received. When the timer is stopped or expires, all correctly received data blocks among data blocks up to and including a data block having a sequence number that is immediately before the sequence number of the data block for which the timer was started is delivered to a higher layer. Further, all correctly received data blocks up to a first missing data block, including the data block for which the timer was started, is delivered to the higher layer.

Abstract: Mechanisms are provided for automatic address range detection for an IP network. Flow data is obtained comprising the source or destination IP addresses for the flow and one of: the other of the source or destination IP addresses; or direction data identifying the flow direction across the network boundary. A tree is generated representing IP addresses in the flow data. IP addresses with initial portions in common are represented in the tree with a node in common. Weights are assigned to nodes in the tree based on occurrences of the represented IP addresses in the flow data. The IP address range of the network is detected by identifying, based on the assigned weights, the node associated with the last initial address portion common to all IP addresses in the network. A device is automatically configured with the IP address range to differentiate IP addresses inside and outside the network.

Abstract: A system for maintaining data connectivity in a satellite communications system including a satellite terminal with a ping mechanism, a satellite ground station, and a ping server, where the ping mechanism pings the ping server and restores data connectivity between the satellite terminal and the satellite ground station.

Abstract: A monitor terminal transmits a monitor request command to monitor a repeater station designated by an operator to a monitor server via the Internet. The monitor server detects a monitor station located in the communication range of the designated repeater station from the content of the received monitor request command, and transmits a monitor instruction command to the detected monitor station via the Internet. The monitor station intercepts a radio signal during transmission from the repeater station to a radio communication device or vice versa. Upon reception of the monitor instruction command, the monitor station transmits the intercepted radio signal as monitor data to the monitor server. The monitor server transfers the monitor data to the monitor terminal. Upon reception of the monitor data transferred from the monitor server, the monitor terminal radio-transmits the received monitor data using a radio wave format receivable by the radio communication device.

Abstract: The present invention provides a radio base station apparatus and a scheduling method that can improve user throughput performance in an adaptive AF-type relay transmission method. The scheduling method according to the present invention includes the steps of receiving a signal including a reference signal, measuring an instantaneous channel gain by path loss and fading, among a mobile terminal apparatus, a radio relay station apparatus and a radio base station apparatus, with respect to an uplink, using the reference signal; and performing downlink resource allocation based on the instantaneous channel gain by path loss and fading.

Abstract: The Ethernet converter includes a LAN switch, an RF device and an antenna, a wired device monitoring module, and an RF device controller. The RF device and the antenna carry out communication with wireless network devices. The wired device monitoring module monitors the operation state of the wired network devices via the LAN switch. The RF device controller controls the operation of the RF device on the basis of the operating state of the wired network devices. If the result of monitoring is that the wired network devices are not operating, the RF device controller stops the operation of the RF device so that power consumption by the RF device is less than when the wired network devices are operating.

Abstract: Provided is an apparatus and method for performing a wideband short-range wireless communication using a directional antenna in a millimeter wave band, and the method for wideband short-range wireless communication according to an embodiment may determine a change of a relay operation type based on a link quality between a source node and a relay node, a link quality between the relay node and the destination node, and a link quality between the source node and the destination node, transmit a relay operation change (ROC) request message in response to a determination of the change of the relay operation type, and receive an ROC response message corresponding to the ROC request message.

Abstract: In a SGSN, upon receiving data addressed to a mobile station by a receiving unit when disconnection of a radio connection with the mobile station is detected by a disconnection detection unit, a relay/non-relay determination unit determines whether or not to relay the data based on the type of communication determined by a communication type determination unit and performs relay of the data according to the determination. This allows the relay of data to be stopped for the type of communication such as conversational communication in SIP, thus preventing the transmission of unnecessary data to the mobile station and thereby reducing the consumption of a resource for radio communication.

Abstract: A method (500) for estimating a carrier frequency offset in a communication system (100) is disclosed herein. In a described embodiment, the communications system (100) comprises a first communications device (120), a second communications device (122) and a relay (110).

Abstract: Mobile communication devices and wireless network device each can participate in, or solely provide, opportunistic data forwarding in a wireless network such as a wireless local area network or radio access network. A supporting node receives wireless communication between a transmitting node and a receiving node comprising packet data units (PDUs). The receiving node communicates to the transmitting node that one or more portions of the communication were not received, which is overheard by the supporting node. The supporting node can have sufficient over-the-air (OTA) allocation in its transmit opportunity to relay the failed portions to the receiving node. Thereby, techniques such as more robust error encoding, longer transmit allocations, etc., that would reduce the effective data throughput for OTA resources are avoided while providing an ability to more rapidly adapt to a changing channel state.

Abstract: A method for detecting errors on an audio/video (A/V) data stream in a data service network includes providing multicast components operably coupled to each other via respective links for transmitting the A/V data stream to a user and for defining at least one multicast tree. The method further includes generating a state information signal indicative of a number of errors on the A/V data stream for at least one of the links and at least one of the plurality of multicast components. The method further includes determining the cumulative number of errors on the A/V data stream that are indicative of the number of errors for the at least one of the links and the at least one of the plurality of multicast components in the multicast tree in response to the state information signal.

Abstract: Network device operability testing is performed by defining a universe of possible device states as a combination of network coverages, available network services and possible subscriber features. In one embodiment, each individual combination of network coverage, for a particular service and feature collectively defines a particular device state for operability testing purposes. In one embodiment, test point data may be generated, where each test point corresponds to the device's operability for a particular device state. In another embodiment, state transitions and test point data may be represented as a node-based device state tree, which may navigated for pinpointing the nature and cause of device operability failures.

Abstract: Methods of dynamically modeling performance of a communications network that may include modeling a communications network using a processor by performing a link budget analysis (LBA) for a configuration of the communications network, receiving a plurality of layers of real-time information about the communications network, iteratively performing additional LBAs using one or more of the layers of real-time information from among the plurality of layers of real-time information, multi-dimensionally co-modeling a matrix comprising results of the iteratively performed additional LBAs, and determining one or more final communications network configuration parameters based on the multi-dimensionally co-modeled matrix.

Abstract: A monitoring apparatus may receive data transmitted from a transmitting source apparatus at predetermined time intervals, via relay apparatuses configured to make a retransmission request depending on a reception error, and measure a reception time interval between consecutively received data. The monitoring apparatus may judge which one of the relay apparatuses is making the retransmission request, based on the measured reception time interval.

Abstract: A method and system are provided for monitoring network performance in order to reveal micro-behavior of network traffic. At least two distinct durations are set for monitoring link utilization. At least one link utilization threshold is set for each duration. Link utilization is monitored at a router using a counter. In addition, a number of durations is provided during which the at least one link utilization threshold has been exceeded.

Abstract: Techniques for receiving reference signals from multiple nodes and determining channel state information (CSI) for the nodes are disclosed. A user equipment (UE) may determine and report CSI for the multiple nodes to support data transmission to the UE. The nodes may transmit reference signals based on different configurations. The configuration for each node may indicate when, where, and how the node transmits its reference signal. The UE may determine CSI for different nodes and/or different combinations of nodes based on the reference signals transmitted by these nodes as well as an indication of which subframes to use to determine each CSI reported by the UE. The UE may report different CSIs for different subframes and may receive data transmission sent by a single node or a combination of nodes based on the reported CSIs.