Abstract: A device may include a maintenance association endpoint configured to select a maintenance association endpoint identifier, transmit the maintenance association endpoint identifier to one or more other maintenance association endpoints, and automatically assign the maintenance association endpoint identifier to the maintenance association endpoint if it is determined that the maintenance association endpoint identifier is available based on a conflict message received from one of the one more other maintenance association endpoints.

Abstract: An apparatus for a base station of a wireless communication network includes a detector to detect an access code received from a mobile station in each of a plurality of time durations and to detect a timing offset of the access code detected in each of the plurality of time durations, an estimator to estimate a carrier-to-interference noise ratio (CINR) during each of the plurality of time durations, and a determining unit to determine a timing offset correction value to be applied to subsequent signals from the mobile station using the CINR, the timing offset, and the access code detected in each of the plurality of time durations.

Abstract: A method, system, and computer program product for enabling the transmission of data from a mobile device to a target device via one or more carrier mobile devices, in a communication network. A proxy mobile carrier (PMC) utility facilitates transmission of data from the originating mobile device to a target device in a network which is inaccessible to the originating mobile device. The PMC utility employs a collection of enhanced transmission enabling components (ETECs) to enable the data transfer via one or more carrier mobile devices. The ETECs include a message creation component, a network zone identification component, a future forwarding zone prediction component, a message acceptor component, a storage component, an inter-node communication component, and a message delivery component. By initiating specific interactions between the ETECs, the PMC utility facilitates the transmission of data from the mobile device to the target device via carrier mobiles.

Abstract: A mechanism is provided by which a transport tree identifier can be generated comprising both an opaque field, containing information that cannot be interpreted by core routers, and a non-opaque field, containing information that can be interpreted by core routers. The transport tree identifier is then used in the process of building a transport tree across a transport network. A transport network egress router can receive a request to join a multicast datastream from a downstream node outside of the transport network. The information contained in the join message that identifies the desired multicast datastream is encoded in the opaque field of the transport tree identifier. Information related to desired route properties is encoded in the non-opaque field, for interpretation by the core routers. The non-opaque field can also include an identifier of a root node core router for the transport tree.

Abstract: The disclosed embodiments include a system and method for modifying network traffic. For example, in one embodiment, the method includes receiving a packet at an intermediate network node at a network layer. The method determines at the intermediate network node whether layer injection can be performed at the intermediate network node. If layer injection can be performed at the intermediate network node, the method identifies at least one application or protocol associated with the packet using deep packet inspection. The method determines a routing modification based on the identified application protocol. The method then performs the routing modification on the packet.

Abstract: The invention is directed to a method for receiving a feedback for at least a multicast broadcast service flow transmitting to a plurality of subscriber stations. The method comprises steps of assigning a plurality of code division multiple access (CDMA) codes to a feedback corresponding to the multicast broadcast service flow and then performing an allocation process for allocating a feedback channel for the subscriber stations. Thereafter, an announcement process is performed to announce a multiple feedback condition, the CDMA codes and the feedback channel to the subscriber stations. A channel monitoring process is performed for receiving a negative-acknowledgment (NACK)-based feedback sending from one of the subscriber stations unsatisfied with the multiple feedback condition and the NACK-based feedback is in a form of one of CDMA codes corresponding to the multicast broadcast service flow and is transmitted through the feedback channel.

Abstract: A system is provided. The system includes a first gateway operable to receive a real-time protocol (RTP) packet including video data from a first endpoint; and a second gateway operable to communicate with a second endpoint. The first gateway is operable to communicate the RTP packet to the second gateway in a sub-channel portion of an frame-based protocol.

Abstract: Techniques are disclosed for compensating for crosstalk using adaptation of data signals transmitted over respective channels of a communication system. For example, a method includes the following steps. A first set of estimated measures of crosstalk is obtained for at least a selected portion of a plurality of communication channels over which data signals are to be transmitted from a transmitter to at least a selected portion of a plurality of receivers. A first set of data signals based on the first set of estimated measures of crosstalk is adapted to generate a first set of adjusted data signals. The first set of adjusted data signals is transmitted to corresponding ones of the plurality of receivers. A second set of estimated measures of crosstalk is obtained for the selected portion of the plurality of communication channels. A second set of data signals for transmission based on the second set of estimated measures of crosstalk is adapted to generate a second set of adjusted data signals.

Abstract: A communication control system capable of reducing the traffic amount, CPU's processing load and channel bands related to a location registering process. In this system, a paging part (303) of a base station apparatus (300) receives a call request message transmitted from an access gateway apparatus (200) and addressed to a wireless terminal apparatus, and generates a call response message indicative of accommodating the wireless terminal apparatus. An MIP location registering part (304) registers an IP address established at the transmitting source of the call request message, and generates a location registration request message that requests a registration of an IP address established at the local base station. A packet combining part (305) generates and transmits a combined packet, which is obtained by combining the call request message with the location registration request message, to the access gateway apparatus (200).

Abstract: A communication control system capable of reducing the traffic amount, CPU's processing load and channel bands related to a location registering process. In this system, a transmitting/receiving part (301) of a base station apparatus (300) receives a call request message transmitted from an access gateway apparatus (200) and addressed to a wireless terminal apparatus, and a location registration determining part (306) determines whether a wireless link to the wireless terminal apparatus to be called can be established. If the wireless link has been established, a position registering part (307) registers an IP address established at the transmitting source of the call request message, and the transmitting/receiving part (301) transmits, to the access gateway apparatus (200), a call response message indicative of accommodating the wireless terminal apparatus in response to the call request message.

Abstract: A transmit signal second-order inter-modulation (IM2) canceller for a portable handset using a full duplex mode of operation (e.g., WCDMA) is used to controllably reduce IM2 introduced by a transmit signal that appears in a received signal in a receive channel of the portable handset. The transmit signal IM2 canceller includes a delay estimator and a digital signal adjuster. The delay estimator receives a first input from a receive channel and a second input from a transmit channel. The delay estimator generates an estimate of the IM2 that the transmit channel introduces in the receive channel. The digital signal adjuster removes the estimate of the IM2 before forwarding a modified receive channel signal to a baseband subsystem of the portable handset.

Abstract: A method and system for contention resolution in a communications network are disclosed. As one example, a method for contention resolution in a communications network is disclosed. The method includes the steps of transmitting a first contention message during a first time interval, determining if a second contention message has been received during the first time interval, if the second contention message has been received during the first time interval, deferring a use of a network resource in the communications network, and if the second contention message has not been received during the first time interval, using the network resource during a second time interval.

Abstract: An arrangement is disclosed where in a multi-carrier communication system, the modulation scheme, coding attributes, training pilots, and signal power may be adjusted to adapt to channel conditions in order to maximize the overall system capacity and spectral efficiency without wasting radio resources or compromising error probability performance, etc.

Abstract: Disclosed are an apparatus and a method for changing a channel prediction depending on the degree of downlink channel variation in predicting an uplink channel for uplink pre-equalization. N number of Doppler frequency ranges are set according to downlink channel variation degrees, and uplink channel prediction schemes corresponding to the respective Doppler frequency ranges are established. A Doppler frequency is measured from a signal received over a downlink channel, and the Doppler frequency range, within which the measured Doppler frequency is included, is determined from among the Doppler frequency ranges. The channel prediction scheme established corresponding to the determined Doppler frequency is selected, and the uplink pre-equalization is performed by using the selected channel prediction scheme. This enables uplink pre-equalization that is suitable for a channel varying with a terminal's moving speed or other channel environments.

Abstract: For an example embodiment, a method for a communication device operating in a synchronous communication system is described. The method includes performing a listen-before-talk (LBT) procedure prior to the start of a downlink subframe of a synchronous frame and determining if a transmission from another communication device of another communication system is detected during the LBT procedure. In the case that a transmission is detected during the LBT procedure, the communication device refrains from transmitting during the downlink subframe. In the case that a transmission is not detected during the LBT procedure, the communication device transmits during the downlink subframe.

Abstract: According to an aspect of the invention, there is provided a wireless communication apparatus for performing a first wireless communication with a first channel having a first bandwidth, and a second wireless communication with a second channel having a second bandwidth wider than the first bandwidth and having a frequency band covering the first channel, in accordance with CSMA/CA system by carrier sense, including: a predicting unit predicting a first time required until a transmission right for the first wireless communication is captured, and a second time required until a transmission right for the second wireless communication is captured; a judging unit judging that either one communication is recommended based upon the first and second times; and a producing unit producing, when judged that a wireless communication different from a present wireless communication is recommended, a notification frame including information indicative of the recommended wireless communication.

Abstract: A device may receive packets for a system and obtain a packet drop rate of the system, a processor utilization rate of the system, and a target processor utilization rate of the system. In addition, the device may determine a target packet drop rate based on the packet drop rate, the processor utilization rate, and the target processor utilization rate. The device may drop a portion of the packets in accordance with the packet drop rate.

Abstract: A system, method and apparatus for communication is provided which includes maintaining a primary and a secondary network media devices at substantially similar encryption state, wherein the secondary network media device is a redundant network media device. Similar encryption state may be maintained by copying reception and transmission switchover parameters from the primary network media device to the redundant network media device, at least once per 2X packets, and preferably every 213 packets that are either transmitted by, or received at, the primary network media device. The redundant network media device may receive packets by utilizing copied reception switchover parameters and transmit packets by estimating transmission switchover parameters based on copied transmission switchover parameters. The reception and transmission switchover parameters may be associated with Secure Real-time Transport Protocol or with PacketCable protocol.

Abstract: A method and apparatus for synchronizing related data streams in interconnection networks. Some embodiments of an apparatus include a transmitter to transmit a data stream to a second apparatus, where the transmitter transmits a data packet to the second apparatus. The apparatus further includes a clock, with the apparatus providing a first timestamp for the data packet using the clock upon transmission of the data packet. The apparatus includes a receiver to receive responses from the second apparatus, with the apparatus providing a second timestamp upon receiving a returned packet from the second apparatus, with the returned packet containing timestamps for the receipt and transmission of the packet by the second apparatus. The apparatus includes a network unit to direct the operation of the apparatus, the network unit to determine a start time for decoding of the data stream by the second apparatus based at least in part on the timestamps for the packet.

Abstract: Systems, methods, and devices are described that monitor network traffic. One method includes monitoring a number of packets received by a network device based on a number of criteria to determine a flow of the packets. For each monitored packet for a particular source IP address/destination IP address pair, the method includes hashing a destination TCP/UDP port number into a range [0 . . . N]. The method further includes setting a bit in a bit field that has a width of N+1 bits based on the hashing.