Abstract: A tree-shaped mesh network is discussed which uses a mesh of wireless nodes that form a tree shaped network with one root node having a connection to an external network; chirp clients; and wireless network clients. Chirp clients comprise low cost chirp devices wherein said low cost chirp devices transmit short duration messages wherein transmission of said short duration messages are scheduled at preset transmission intervals. At least one wireless node of the mesh of wireless nodes is a designated chirp-aware node wherein said chirp-aware node sets the preset transmission intervals for chirp client communication by broadcasting a beacon prior to transmission by chirp clients and said chirp-aware node further comprises a bridge between the short duration messages and IP based devices wherein said bridge includes a wireless receiver to receive the short duration messages and is connected to said external network.

Abstract: The invention relates to a method in a user equipment 4 for determination of timing of a Hybrid Automatic Repeat re-Request, HARQ, response. The user equipment 4 operates in a communication network 1 comprising a primary radio access technology system 2 and a secondary radio access technology system 3. The user equipment 4 receives on at least one downlink carrier on the first radio access technology system 2 and on at least one downlink carrier on the second radio access technology system 3.

Abstract: A receiver including a physical layer module and a processing module. The physical layer module is configured to receive a packet via a medium. The packet includes a first preamble followed by a second preamble. The first preamble is generated based on a first data rate. The second preamble is generated based on a second data rate. Each of the first preamble and the second preamble includes a duration of the packet. The processing module is configured to process (i) the first preamble in response to the receiver operating at the first data rate or (ii) the second preamble in response to the receiver operating at the second data rate. The processing module is configured to determine whether to defer accessing the medium for the duration of the packet based on the processing of the first preamble or the second preamble.

Abstract: Embodiments of the present invention provide a method and an apparatus for demodulating a physical random access channel signal. The method includes: acquiring a down-sampling sequence of a PRACH demodulation signal, and acquiring a power sequence of the down-sampling sequence; determining a position of a sounding reference signal sampling point in the down-sampling sequence according to the power sequence; and eliminating the sounding reference signal sampling point in the down-sampling sequence according to the position of the sounding reference signal sampling point, so as to perform PRACH coherent detection on a down-sampling sequence obtained after the sounding reference signal sampling point is eliminated. In the method and the apparatus for demodulating a physical random access channel signal in the embodiments of the present invention, interference from a sounding reference signal can be restrained and false alarms in PRACH detection can be reduced.

Abstract: A method for performing uplink signaling and data transmission between a terminal device and a network element is described. The method includes applying, during a transmission, at least one of TDM and FDM between a SRS, a control channel, a DRS and a data channel. Clustered sub carrier mapping is applied for the SRS and the control channel. The SRS is transmitted so as to function as a DRS for the control channel. The control channel and the data channel are transmitted during a same sub-frame. The method also includes receiving the SRS and receiving the control channel and the data channel during a same sub-frame. Control information and data are extracted from the control channel and the data channel. The SRS is used as a DRS for the control channel is included in the method. Apparatus and computer readable media are also described.

Abstract: A novel solution is presented in which a MAC (Medium Access Controller) is implemented that includes multiple functionality types. This MAC may include functionality supporting communication according to one or more of the IEEE 802.11 WLAN (Wireless Local Area Network) related standards and also to one or more of the standards generated by the IEEE 802.15.3 PAN (Personal Area Network) working group. By providing this dual functionality of a multi-mode WLAN/PAN MAC, a communication device may adaptively change the manner in which it communicates with other communication devices. For example, in an effort to maximize throughput and overall efficiency of communication within a communication system, certain of the various devices may change from using the WLAN related standards to using the PAN related standards, and vice versa, based on any one or more of a variety of operational parameters including system configuration.

Abstract: In accordance with an embodiment, a method of operating a base station configured to communicate with at least one user device includes transmitting a first group of resource elements that include a time and a frequency. At least one of the first group's resource elements includes a reference element. It is determined if the at least one user device will decode a further resource element using the reference element of the at least one of the resource elements of the first group of resource elements. Based on the determining, if the user device will decode the further resource element, a second group of resource elements is transmitted, where at least one of the resource elements of the second group of resource elements corresponding with the at least one of the resource elements of the first group does not include a reference element.

Abstract: Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation.

Abstract: The present invention relates to methods and arrangements for neighbor cell quality measurements using silent resource element (RE) grids, and as well to a silent RE grid.

Abstract: There is provided a communication system comprising: a first communication device that senses a communication environment surrounding the first communication device; a second communication device that acquires sensed data sensed by the first communication device; and a third communication device that determines availability of usage of a second communication service using a part or whole of a spectrum assigned to a first communication service based on the sensed data transmitted from the second communication device.

Abstract: A user terminal according to an embodiment includes a receiver that receives a list transmitted from a base station, the list including discovery resource configurations; and a controller that selects a discovery resource configuration from among the discovery resource configurations, and uses the selected discovery resource configuration to directly transmit a discovery signal to other user terminals. Each of the discovery resource configurations includes: time resource information indicating time resources used for transmitting a discovery signal and including a variable number substituted into a mathematical expression; frequency resource information indicating frequency resources used for transmitting the discovery signal and including a range of continuous resource block numbers; and power information indicating transmission power used for transmitting the discovery signal.

Abstract: In one exemplary embodiment, a method includes: configuring a common resource space having a plurality of time-frequency resources and code resources, where the common resource space includes a first portion for a first type of signaling and a second portion for a second type of signaling, where the first type of signaling includes at least one of persistent acknowledgement signaling and scheduling request signaling, where the second type of signaling includes dynamic acknowledgement signaling; and allocating, based on the configured common resource space, resources of the common resource space for the at least one of persistent acknowledgement signaling and scheduling request signaling.

Abstract: A method for reducing Peak-to-Average Power Ratio (PAPR) in a Single Carrier Frequency Division Multiple Access (SC-FDMA) based radio communication system is provided. The method includes arranging symbols mapped to predetermined sub-carrier allocation types such that phases of the symbols do not overlap, and transmitting the arranged symbols.

Abstract: Methods and apparatuses are provided for transmitting and receiving information. A User Equipment (UE) identifies first information for a cyclic shift value, transmitted from a Node B. The UE identifies second information for the cyclic shift value, transmitted from the Node B. The UE obtains a sequence based on a Zadoff-Chu sequence and the cyclic shift value defined based on the first information and the second information. The UE transmits the sequence in a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol to the Node B. The SC-FDMA symbol is predefined among a plurality of SC-FDMA symbols in a slot of a subframe.

Abstract: Provided is a communication method for downlink transmission with a low peak to average power ratio (PAPR) and compatibility with long-term evolution (LTE)-based downlink transmission in an LTE-based mobile communication system in which the performance degradation may occur due to a high PAPR in multi-carrier transmission caused by non-linearity of a power amplifier in a base station including a satellite, to have the effects of supporting a terminal that reuses an existing terrestrial LTE chipset and a terminal that enables downlink reception with a low PAPR with no collision between the terminals, and of implementing an integrated satellite/terrestrial mobile communication system with a minimum change of an existing mobile communication system to ensure economic efficiency.

Abstract: A User Equipment, UE, supporting communication in a multicarrier radio communication system and a method therein for receiving information from a Radio Base Station, RBS, are provided. The method comprises determining 310 a bandwidth by which the UE will receive information, the bandwidth comprising a plurality of sub-carriers. The method also comprises adjusting 320 a bandwidth of the UE to correspond to the determined bandwidth by which the UE will receive information; and fine tuning 330 a local oscillator of the UE such that a centre frequency of a local oscillator does not coincide with a predetermined subcarrier transmitted from the RBS.

Abstract: A method for performing uplink signaling and data transmission between a terminal device and a network element is described. The method includes applying, during a transmission, at least one of TDM and FDM between a SRS, a control channel, a DRS and a data channel. Clustered sub carrier mapping is applied for the SRS and the control channel. The SRS is transmitted so as to function as a DRS for the control channel. The control channel and the data channel are transmitted during a same sub-frame. The method also includes receiving the SRS and receiving the control channel and the data channel during a same sub-frame. Control information and data are extracted from the control channel and the data channel. The SRS is used as a DRS for the control channel is included in the method. Apparatus and computer readable media are also described.

Abstract: A method for operating a mobile device adapted for device-to-device (D2D) communications includes determining a utilization measure for discovery resources (DRs) allocated for D2D discovery in a communications system, and sending a utilization measure report to an evolved NodeB (eNB) when a reporting criterion is satisfied, wherein the utilization measure report is configured to prompt an adjustment to a number of DRs allocated for D2D discovery when an adjustment condition is met.

Abstract: The present invention provides methods implemented in a base station having a plurality of antennas and one or more user terminals. One embodiment of the method includes receiving feedback from at least one user in response to transmitting a first frame to said at least one user. The first frame is formed by pre-coding at least one symbol using at least one first code word selected from at least one first code book associated with the at least one user. The method also includes transmitting at least one second frame to the user(s). The second frame(s) are pre-coded using at least one second codeword selected from at least one second codebook. The second codebook(s) determined based on the feedback and the first codeword(s).

Abstract: Embodiments of the present invention disclose a method, apparatus, and system for measurement for D2D communication, used to reduce blindness of measurement in a mechanism of D2D communication between terminals.

Abstract: A method and apparatus are provided for transmitting a Reference Signal (RS) by a User Equipment (UE) in a wireless communication system. The method includes transmitting a DeModulation Reference Signal (DM RS) and information data in a sub-frame; and transmitting a Sounding Reference Signal (SRS) in a last symbol in another sub-frame. The DM RS is transmitted in a middle symbol in each slot of the sub-frame, and the information data is transmitted in other symbols in each slot of the sub-frame.

Abstract: A verification device for a LOS MIMO/SIMO system which comprises a transmitter unit connected to a first and a second transmit antenna and a first receive antenna connected to a first down-converter which outputs a first down converted signal and a second receive antenna connected to a second down-converter which outputs a second down-converted signal. The first and the second receive antennas receive a first signal with reference symbols transmitted from one of said first and second transmit antennas, and the verification device obtains the phase difference between the first signal as received in the first and the second receive antennas respectively by comparing the first down-converted signal and the second down-converted signal with the reference symbols.

Abstract: A system includes a gateway that is configured to receive a message from a source for transmission to a destination and multiple communication channels on which to transmit the message to the destination, where the communication channels include different types of communication channels. The system includes a decision engine that is operably coupled to the gateway and the communication channels. The decision engine is configured to select a first communication channel from the communication channels to route the message for transmission to the destination. The decision engine is configured to select a second communication channel from the communication channels to route the message for transmission to the destination in response to a period of time expiring without receiving an acknowledgement from the destination via the first communication channel, where the second communication channel is a different type of communication channel than the first communication channel.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for the coexistence of 1 MHz and 2 MHz operation modes within a wireless communication system in accordance with IEEE 802.11ah, for example. One example method generally includes scanning a plurality of channel pairs, wherein each of the channel pairs comprises a first channel having a first channel designation and a second channel having a second channel designation; determining, based on the scan, a set of open channels from the plurality of channel pairs in which no other apparatus is operating; selecting a primary channel based on the determination; and transmitting using the selected primary channel. The selection of the primary channel involves channel selection rules disclosed herein.

Abstract: A method of transmitting a discovery signal by a first UE for device-to-device (D2D) communication in a wireless communication system according to the present invention includes a step of a first UE transmitting a discovery signal for identifying a second UE for D2D communication, wherein the discovery signal includes information related to the presence or absence of D2D data for the D2D communication.

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus allocates K blocks of subframes for WAN and peer-to-peer communications in a discovery period T and remaining subframes in the discovery period T for WAN communications and allocates a first set of subframes for peer discovery and a second set of subframes for the WAN communications in each block of the K blocks.

Abstract: A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.

Abstract: Certain embodiments herein are directed to optimized decoding of in-band on-channel (IBOC) services, such as audio, traffic, and data associated with HD Radio™. Service information, such as service boundaries for one or more segments associated with IBOC services, may be identified and formatted for transmission to a receiver device. The receiver device may use the service boundaries to select or filter segments associated only with a service of interest from a bit stream of segments associated with one or more other services, according to one embodiment.

Abstract: One embodiment of the present invention relates to a method for a terminal acquiring synchronization in a wireless communication system, comprising the steps of: receiving a first signal from on a first carrier; receiving a second signal, which is positioned on a resource element having a predetermined pattern, from at least one subframe from subframes excluding the subframe that receives the first signal; and acquiring synchronization with respect to the first carrier by using the first signal and the second signal.

Abstract: The present invention relates to a method of dynamic channel switching in a wireless mesh network that is in conformance with an IEEE 802.11s standard. The method comprises the steps of transmitting a request frame to a node for scanning a channel associated with the node; determining a link quality of the channel; receiving a response frame from the node; and switching to the channel if the switching metric is larger than a switching threshold, wherein if otherwise, remain unswitched. The switching metric integrates the interference, transmission frame size, latency of channel switching and data rate of the node on the channel.

Abstract: Methods and apparatus for partitioning resources for enhanced inter-cell interference coordination (eICIC) are provided. Certain aspects involve broadcasting a message indicating time-domain resource partitioning information (RPI), where a user equipment (UE) may be operating in idle mode. With the RPI, the UE may be able to identify protected resources with reduced/eliminated interference from neighboring cells. The RPI in this broadcasted message may be encoded as a bitmap as an alternative or in addition to enumeration of the U/N/X subframes. Other aspects entail transmitting a dedicated or unicast message indicating the time-domain RPI, where a UE may be operating in connected mode. With the RPI, the UE may be able to determine channel state information (CSI), make radio resource management (RRM) measurements, or perform radio link monitoring (RLM), based on one or more signals from a serving base station during the protected time-domain resources.

Abstract: An apparatus and method for dual re-configurable logic devices for MIMO-OFDM communication systems. The apparatus includes two FPGA devices, wherein the FPGA 1 has a centralized processing unit that manages the data flow between both MIMO OFDM modem. The apparatus and method support transmitting and receiving via a plurality of dual-polarized antennas. The modulated transmitted from FPGA 1 uses antenna 1 horizontal polarization to antenna N/2 horizontal polarization and the modulated transmitted from FPGA 2 uses antenna N/2+1 vertical polarization to antenna N vertical polarization.

Abstract: A first wireless node may determine that a first reserved retransmission frame overlaps with a second reserved transmission frame and a second reserved retransmission frame and that the second reserved transmission frame overlaps with a first reserved transmission frame and the first reserved retransmission frame. The first reserved transmission frame and the first reserved retransmission frame may be reserved for wireless communication with a first master node, and the second reserved transmission frame and the second reserved retransmission frame are reserved for wireless communication with a second master node. The wireless node may also process and acknowledge data received from the first master node during the first reserved transmission frame based on the determining, ignore data sent by the second master node during the second reserved transmission frame based on the determining, and process and acknowledge data received from the second master node during the second reserved retransmission frame.

Abstract: The present invention relates to a wireless communication system. More particularly, disclosed are a network-initiated control method and an apparatus for providing a proximity service (ProSe). A method for supporting ProSe between a plurality of terminals at a network node of a wireless communication system according to one embodiment of the present invention comprises: a step of acquiring base ProSe information from one or more of the plurality of terminals or from one or more of other network nodes; a step of allowing the network node to detect whether ProSe is enabled between the plurality of terminals based on the acquired base ProSe information; and a step of transmitting information indicating whether ProSe is allowed or not to one or more of the plurality of terminals.

Abstract: Methods and apparatuses are provided for transmitting control information in an SC-FDMA system. A UE determines cyclic shift values for SC-FDMA symbols. The UE acquires cyclic shift sequences by the cyclic shift values. The UE applies the cyclic shift sequences to the control information on an SC-FDMA symbol basis. The control information applied with the cyclic shift sequences in the SC-FDMA symbols is transmitted to a Node B.

Abstract: A user equipment comprises a wireless interface for communication with a cellular communication network. The user equipment is configured to detect a device-to-device signal received from a further user equipment at the wireless interface. The user equipment is configured to search for a cell of the cellular communication network to camp on based on the device-to-device signal.

Abstract: A method for transmitting uplink signals from a user equipment to a base station in a time division multiplexing wireless communication system is disclosed. The method comprises the steps of transmitting a first uplink signal on an uplink subframe or a special subframe that precedes the uplink subframe, by preceding a first timing advance value at a reference time; and transmitting a second uplink signal on the uplink subframe by preceding a second timing advance value at the reference time, wherein the first timing advance value is greater than the second timing advance value, and the first uplink signal is transmitted for an uplink pilot time slot (UpPTS) period of the special subframe if a difference value between the first timing advance value and the second timing advance value is greater than a preset value.

Abstract: A data transmission method and system, transmitter and receiver. The method includes: mapping, by a transmitter, a plurality of data streams to a plurality of antennas of the transmitter by using precoding matrices and transmitting the plurality of data streams to a receiver via the plurality of antennas, wherein the transmitter selects the precoding matrices by taking a resource block as a granularity. With the embodiments of the present invention, the transmitter may transmit data streams to the receiver by using the precoding matrices W, and selects the precoding matrices W by taking a resource block (RB) as a granularity, so as to support DM-RS demodulation, and the receiver is not needed to perform PMI feedback, which is also applicable to a scenario where user feedback is not supported or PMI feedback is inaccurate, thereby achieving open-loop spatial multiplexing CoMP transmission.

Abstract: The present invention relates to a method for a receiving terminal to transmit uplink control information to a transmitting terminal in a wireless communication system. In more detail, the method for transmitting the uplink control information includes: mapping the uplink control information into at least one available symbol included in each of a first slot and a second slot of a specific subframe; applying a first orthogonal sequence corresponding to the first slot to the uplink control information mapped into the first slot and a second orthogonal sequence corresponding to the second slot to the uplink control information mapped into the second slot; and transmitting the uplink control information having the orthogonal sequence applied to the transmitting terminal. The first orthogonal sequence corresponds to the number of available symbols in the first slot and the second orthogonal sequence corresponds to the number of available symbols in the second slot.

Abstract: The present invention provides methods and apparatus for transmitting and receiving over a MIMO radio link. In particular, a precoding matrix is applied to transmitted signals and constrained in such a way so as to limit the additional peak to average power ratio (PAPR) caused by applying the precoding matrix. For example, each row of the precoding matrix may have a single non-zero element, and/or each column may have the same number of non-zero elements.

Abstract: There are provided a method of user equipment searching for control information and an apparatus using the same. The method includes receiving information about the position of an Enhanced-Physical Control Format Indication Channel (E-PCFICH) from a base station, receiving an E-PCFICH based on the information about the position of the E-PCFICH, obtaining information about the frequency band of an Enhanced Physical Downlink Control Channel (E-PDCCH) region through the E-PCFICH, and searching the E-PDCCH region for an E-PDCCH for the user equipment, wherein the E-PCFICH is transmitted in an OFDM symbol between a Physical Downlink Control Channel (PDCCH), transmitted in the first N (N is one of natural numbers 1 to 4) Orthogonal Frequency Division Multiplexing (OFDM) symbols of a subframe in the time domain, and the E-PDCCH region.

Abstract: A cognitive radio scanning method is disclosed that enables cognitive radios to rapidly scan for neighboring channels by staggering the position of beacons across the frame relative to other channels and intelligently allocate the bandwidth across super frames such that a device has the ability to switch and scan multiple beacons both within and across multiple super frames.

Abstract: In order to provide a transmission device which can resolve the deterioration in transmission characteristics due to lack of the resolution of a D/A converter in a high speed and large capacity digital communication, a transmission device according to an exemplary aspect of the present invention includes an encoding unit encoding input data; an unequal-interval quantization unit quantizing an output signal from the encoding unit by a quantization level number based on a resolution of a subsequent digital-to-analog conversion unit by using an unequally spaced quantization level interval based on the output signal; the digital-to-analog conversion unit converting an output signal from the unequal-interval quantization unit into an analog signal; an output level adjustment unit adjusting an output level of the digital-to-analog conversion unit so as to compensate a difference between a predetermined initial transfer function and a transfer function of the unequal-interval quantization unit; and a modulation unit

Abstract: A method of assembling a frame in an Orthogonal Frequency Division Multiple Access (OFDMA)-based communication system, wherein data packets to be transmitted from a broadcast station to a receiver are given a rectangular shape in terms of the two dimensions—time and frequency—of the OFDMA frame, and wherein the data packets are successively fitted into the OFDMA frame by way of a frame assembly scheduler, is characterized in that the filling process of the OFDMA frame is based on an ordered list of data structures that represent the current empty space within the OFDMA frame. Furthermore, a corresponding communication system is disclosed.

Abstract: A method includes determining, at a first cell and for a selected user equipment, a second cell would have a better performing RF interface connection with the selected user equipment than the selected user equipment currently has with the first cell. The first cell can provide radio frequency coverage for the second cell. The method includes sending to the second cell one or more messages indicating the second cell should not enter or be in an energy saving state at least while the selected user equipment or a selected user application on the selected user equipment is connected to the second cell. Another method includes determining a cell should not enter an energy saving state at least while a selected user equipment is connected to the cell; and the cell not entering the energy saving state at least while the selected user equipment is connected to the cell.

Abstract: The embodiments herein relate to a method in a near end radio link node for controlling power consumption in a radio link system. The near end radio link node is connected to a far end radio link node via a radio link. The near end radio link node obtains a granted rate of traffic on the radio link between the near end radio link node and the far end radio link node. The near end radio link node obtains a demanded rate of the traffic between the near end radio link node and the far end radio link node. The near end radio link node controls power consumption for the radio link system based on the granted rate and the demanded rate.

Abstract: Provided is a method of transmitting and receiving data using a persistent allocation scheme in order to effectively support a voice service between a base station and a mobile terminal in a packet based mobile communication system. When an error occurs in transmitting a control information that indicates whether to use a radio resource using the persistent allocation scheme, the base station may retransmit the control information and thereby maintain a communication quality.

Abstract: The transmission system transmits an encrypted identifier ultrasonically in an open-air environment using an ultrasonic transmitter. The ultrasonic identifier is associated with a location, which may be a store or a department within a store, and may be received by a microphone on a mobile phone. The identifier may be used to infer presence of the mobile phone user at the location associated with the identifier. The transmitter may include an ultrasonic transducer. The system may further provide a reward, responsive to inferring presence at the location.

Abstract: A method of requesting a plurality of different characteristic indicators from a second communication apparatus (MS) in a wireless communication network comprising a first communication apparatus (BS) and a plurality of such second communication apparatuses (MS) which communicate with the first communication apparatus using a shared communication frame, the method comprising; the first communication apparatus (BS) transmitting (110) a single standing instruction to the second communication apparatus (MS) to interchange between sending the different characteristic indicators in a feedback window allocated to the second communication apparatus in the shared communication frame.

Abstract: A radio frequency (RF) bus controller includes an interface and a processing module. The interface is coupled for communicating intra-device RF bus access requests and allocations. The processing module is coupled to receive an access request to an RF bus via the interface; determine RF bus resource availability; and when sufficient RF bus resources are available to fulfill the access request, allocate, via the interface, at least one RF bus resource in response to the access request.