Abstract: A VPN implementation method and a PE device are provided. The method includes: sending VPN topology information of a local end to a PE device at a peer end, and receiving VPN topology information of the peer end sent by the PE device at the peer end; enabling, according to the VPN topology information of the local end and the VPN topology information of the peer end, the local end and the peer end to select a jointly supported topology; and connecting VPN members by using the jointly supported topology, so as to implement the VPN. A VPN in a multi-topology environment may be implemented, and service quality of a multi-topology VPN may be improved.

Abstract: Methods and apparatus are described. A method, implemented in a wireless transmit/receive unit (WTRU), includes receiving a single radio resource control (RRC) connection reconfiguration request. The single RRC connection reconfiguration request includes individually, for each of a plurality of cells, physical configuration information. One of the plurality of cells is a primary cell and other cells of the plurality of cells are non-primary cells. Measurement configuration information is received that configures the WTRU to send a measurement report on a condition that a neighboring cell is better than a non-primary cell by an amount.

Abstract: A method for synchronization in a network node is disclosed. The method comprises determining an N-symbol slice of a received signal, the N-symbol slice corresponding to a sync point hypothesis, dividing the N-symbol slice into one or more segments, each of the one or more segments having the same symbol length, and determining one or more phase rotation operators for each of the one or more segments, the determined one or more phase rotation operators compensating for a phase rotation introduced by an initial frequency error. The method further comprises performing coherent correlation within each of the one or more segments using the determined one or more phase rotation operators, and performing differentially coherent correlation on each of the one or more segments.

Abstract: A method for measuring network throughput is provided. The method comprises the following steps: exchanging messages with a time synchronization protocol server in compliance with a time synchronization protocol, synchronizing a slave clock with a master clock of the time synchronization protocol server according to time information related to the messages, and calculating at least one network throughput according to the time information and size information related to the messages.

Abstract: A method of conveying transmit power information from a first cell to a second cell is provided. The first cell prepares a data structure including a plurality of elements, each element corresponding to a respective downlink subframe in a radio frame associated with the first cell and its value corresponding a respective minimum transmit power reduction level promised by the first cell during the downlink subframe. The first cell then transmits the data structure to the second cell via a predefined interface. The second cell processes the data structure and schedules one or more user equipments in one or more downlink subframes of the radio frame in accordance with the data structure.

Abstract: A preamble generating unit generates first and second synchronization preambles having different numbers of subcarriers. A transmission signal generating unit generates an OFDM transmission signal through time-division multiplexing by using the generated first and second synchronization preambles. A transmission RF unit converts the generated OFDM transmission signal into a radio-frequency OFDM signal and transmits the radio-frequency OFDM signal. The preamble generating unit adds a predetermined dummy period between the first synchronization preamble and the second synchronization preamble.

Abstract: One of the embodiments of the present invention relates to a method for calibrating mobile robustness optimization function for inter-cell handover. The method comprises detecting mobile robustness optimization deviation; calibrating said mobile robustness optimization function by—compensating the detected mobile robustness optimization deviation. The embodiments of the present invention further provide corresponding apparatuses and base stations.

Abstract: Systems and methods are disclosed for efficient signaling between devices. A leaf device initiates association with chirp signals to relay devices. Relay devices respond with keep alive signals. The leaf device selects a relay (from those that responded) and associates with it. Alternatively, selection of the relay may be offloaded to a base station. In another embodiment, an available relay device transmits a discovery broadcast to leaf devices. A leaf device responds with a chirp signal to the relay and association occurs. After association, the leaf device periodically sends a chirp signal and the relay responds with a keep alive signal. If either device fails to send its signal, link breakage is assumed. The leaf device reverts to uplink communication with a base station while searching for another relay. Downlink paging may be synchronized with the chirp/keep alive signaling. Other aspects, embodiments, and features are also claimed and described.

Abstract: Systems, methods, and devices for wireless communication are provided. In an embodiment, a method of determining communication parameters for wireless communication includes receiving, at an access point, a probe request comprising a transmission power indication. The method further includes determining a received transmission power. The method further includes estimating a path-loss based on the transmission power indication and received transmission power. The method further includes transmitting a first probe response using a first set of communication parameters defining a first rate. The method further includes transmitting a second probe response using a second set of communication parameters defining a second rate when the access point does not receive an acknowledgement to the first probe response within a timeout period, the second rate being lower than the first rate.

Abstract: Rapid failure detection and recovery in wireless communication networks is needed in order to meet, among other things, carrier class Ethernet transport channel standards. Thus, resilient wireless packet communications is provided using a hardware-assisted rapid transport channel failure detection algorithm and a Gigabit Ethernet data access card with an engine configured accordingly. In networks with various topologies, this is provided in combination with their existing protocols, such as rapid spanning tree and link aggregation protocols, respectively.

Abstract: Systems and methods for transmitting and receiving OFDM symbols are provided which enable the otherwise wasted transmission time normally used as a prefix for each OFDM symbol to contain useful information. At the receiver, the received signal is processed to convert received OFDM symbols from a linear convolution with the channel to a cyclic convolution.

Abstract: Systems and methods which provide mitigation of self-interference in spectrally efficient full duplex (e.g., transmit and receive using the same frequency simultaneously) communications are described. Embodiments provide an interference mitigation structure having a multi-tap vector modulator interference cancellation circuit operable to cancel time varying multipath interference in the analog RF domain. A multi-tap vector modulator interference cancellation circuit of embodiments may comprise part of a multi-stage interference cancellation circuit, such as a multi-stage interference cancellation circuit comprising a multi-tap vector modulator interference cancellation circuit and a digital residual interference cancellation circuit. A digital residual interference cancellation circuit of embodiments provides residual interference cancellation.

Abstract: Disclosed are systems, methods and devices for obtaining round trip time measurements for use in location based services. In particular implementations, a fine timing measurement request message wirelessly transmitted by a first transceiver device to a second transceiver device may permit additional processing features in computing or applying a signal round trip time measurement. Such a signal round trip time measurement may be used in positioning operations.

Abstract: A multicast content delivery system can use both multicast and unicast streams to efficiently use available bandwidth to deliver content. Available multicast content can be identified to gateways serving consumption devices, and the gateways can receive requests for unicast content deliver, but honor the requests with multicast group sessions.

Abstract: A communication control method is employed in a mobile communication system including a general cell supporting PTM transmission of MBMS data and a specific cell not supporting PTM transmission of the MBMS data. The method comprises: a step A of broadcasting general cell load information from the general cell; a step B of receiving the general cell load information broadcasted in the step A, by a user terminal which receives the MBMS data from the general cell in an idle mode with the general cell selected as a cell on which to camp; and a step C of controlling cell reselection from the general cell to the specific cell by the user terminal, based on the general cell load information received in the step B.

Abstract: Devices and methods of reducing overall Hybrid Automatic Repeat Request-Acknowledgment (HARQ-ACK) of user equipment (UE) using a large amount of carrier aggregation are generally described. The UE may receive a subframe from an enhanced NodeB (eNB). The subframe may contain a physical downlink control channel (PDCCH) formed in accordance with a Downlink Control information (DCI) format. The DCI format may comprise a Downlink Assignment Index (DAI) for Time Division Duplexed (TDD) and Frequency Division Duplexed (FDD) operation. The UE may determine, dependent on the DAI, a number and ordering of Hybrid Automatic Repeat Request-Acknowledgment (HARQ-ACK) bits to be transmitted on a Physical Uplink Shared Channel (PUSCH) and subsequently transmit the HARQ-ACK bits.

Abstract: A method for transmitting a data unit and a device suing the same is provided. The device generates a physical layer protocol data unit (PPDU) that includes a first part and a second part. The first and second part are generated with different fast Fourier transform (FFT) size. A phase rotation of the second part is different from a phase rotation of the first part.

Abstract: According to one embodiment of the present invention, a method for determining an energy-saving (ES) compensation cell in a wireless access system comprises: a step of transmitting an ES compensation candidate request message to confirm whether the ES compensation state can be changed from a first base station to a second base station; a step of receiving, from the second base station, an ES compensation candidate response message for indicating the switch to the ES compensation state; a step of receiving, from the second base station, an ES candidate cell indicator message including an ES state cell list for indicating third base stations to be additionally switched to the ES state; and a step of determining the ES compensation cell on the basis of the ES compensation candidate response message and the cell list.

Abstract: Techniques and apparatus for efficiently determining the radio link control (RLC) protocol data unit (PDU) size and flexible RLC PDU creation for multi carrier operation are disclosed. An example wireless transmit/receive unit (WTRU) calculates a maximum amount of data allowed to be transmitted for a current transmission time interval (TTI) for each of a plurality of carriers, and selects an RLC PDU data field size such that each RLC PDU to be multiplexed to a medium access control (MAC) PDU matches a minimum of the maximum amount of data calculated for the carriers. The maximum amount of data may, for example, be calculated based on an applicable current grant for each carrier for the current TTI.

Abstract: A method and an apparatus for bundling data packet acknowledgments in a wireless communication device is disclosed. The method includes determining a metric proportional to a communication distance between the wireless communication device and a counterpart wireless communication device; selecting a number of data packet acknowledgments to be bundled together according to the determined communication distance such that when the communication distance is higher, the higher number of data packet acknowledgments are bundled together into a single acknowledgment message; and causing transmission of the acknowledgment message comprising the selected number of data packet acknowledgments.