Abstract: Aspects of a greedy search user group selection scheme with range reduction for FDD multiuser MIMO downlink transmission with finite-rate channel state information feedback are provided. The method may comprise receiving feedback information via a communication channel for a plurality of users in a frequency division duplex system. The system capacity may be maximized using the feedback information based on a signal from a single user within a reduced search range or based on the signal from the single user and at least one other signal from another user within a remaining portion of the search range. The feedback information may comprise quantized gain and/or direction of the channel state information of the users.

Abstract: A base station includes: an estimation section estimating transmission condition of each of frequency channels used for communication; a reception section receiving a data signal from each communication terminal through any of the frequency channels; a measurement section measuring received signal power of the received data signal for each frequency channel; a determination section determining, for each frequency channel, whether the received data signal is demodulated errorlessly; and a control section assigning frequency channels estimated as being in good transmission condition by the estimation section, to communication terminals the data signals of which are determined as not being errorlessly demodulated by the determination section, such that a frequency channel in a better transmission condition is assigned preferentially to a communication terminal having larger received signal power detected by the detection section, and transmitting retransmission request signals requesting the communication termin

Abstract: A method and apparatus are provided for allocating and transmitting groups of subcarriers, called tiles, between a plurality of transceiver antennas. The method includes receiving at least one downlink signal by a subscriber station transceiver through at least one of the plurality of subscriber station antennas, characterizing a received signal of at least one downlink signal over multiple subcarriers, and allocating tiles for uplink transmission through at least one of the plurality of transceiver antennas. The tiles allocation is based on the characterized received signal of the at least one downlink signal over multiple subcarriers and is based on a required power Ptx for uplink transmission compared with a maximum power P that each of the plurality of the transceiver antennas can emit.

Abstract: Indications of desired radio communications downlink characteristics are transmitted via a radio communications uplink from a user equipment to a node of a cellular wireless network, the indications each relating to one or more components of a radio communications link from the node to the user equipment. The indications are transmitted successively at different cycles, and at each different cycle a first parameter is determined, indicating a more preferred number of components and a second parameter is determined, indicating a less preferred number of components. First additional parameters are calculated and transmitted relating to the desired radio communications link quality corresponding to the first parameter and second additional parameters are calculated and transmitted relating to the desired radio communications link quality on the basis of the second parameter. The first and second parameters are each parameters which are variable between different cycles.

Abstract: A method for processing signals in a communication system includes selecting, from a plurality of users, a first user having a channel gain that is greater than a channel gain corresponding to a remaining portion of the plurality of users. At least a second user may be selected from a portion of the remaining portion of the plurality of users, based on a feedback channel gain of the second user. The selected second user may have a channel direction that is approximately orthogonal to a channel direction of the first user. System capacity may be determined based on the selecting of the first user and the selecting of the second user. The channel gain may be defined by a quantized channel gain. A quantized channel direction of the selected first user may be determined for the selecting of the second user.

Abstract: Indications of desired radio communications downlink characteristics are transmitted via a radio communications uplink from a user equipment to a node of a cellular wireless network, the indications each relating to one or more components of a radio communications link from the node to the user equipment. The indications are transmitted successively at different cycles, and at each different cycle a first parameter is determined, indicating a more preferred number of components and a second parameter is determined, indicating a less preferred number of components. First additional parameters are calculated and transmitted relating to the desired radio communications link quality corresponding to the first parameter and second additional parameters are calculated and transmitted relating to the desired radio communications link quality on the basis of the second parameter. The first and second parameters are each parameters which are variable between different cycles.

Abstract: Techniques for enhanced co-existence for co-located radios are described. A mobile computing device may comprise a first radio module operative to communicate wirelessly across a first link using a first set of communications channels, a second radio module operative to communicate wirelessly across a second link using a second set of communications channels, and a coordination module operative to receive information regarding operation of the first and second radio modules, and modify a communications parameter for the first or second radio module based on the received information. Other embodiments are disclosed and claimed.

Abstract: A mobile station is configured to use, a reception quality of GPS electric wave received by a mobile station, time needed in obtaining GPS location information (or the reception quality of preset television or radio broadcasting) as surrounding environmental information of the mobile station and to control, based on the surrounding environmental information, measurement of a link status (reception quality) and/or reporting of the measurement to a base station. A report from the mobile station is transmitted via the base station and a gateway to a management server which optimizes radio parameter based on the report.

Abstract: A method of operating a wireless device includes determining a preferred subset of bands of a set of bands for communicating with a first node, communicating a scheduling request with the first node, and determining whether to schedule a data transmission on each band of the set of bands based on the preferred subset of bands and the scheduling request.

Abstract: A method for operating a Mobile Station (MS) in a Multiple Input Multiple Output (MIMO) wireless communication system is provided. The method includes measuring channel quality for a serving Base Station (BS), if the channel quality is less than a threshold, measuring interference power from one or more neighbor BSs, determining a Precoding Matrix Index (PMI) and a priority metric for each neighbor BS, and feeding back at least one of the PMI, a PMI type indicator, the priority metric, and the channel quality to the serving BS.

Abstract: A method for managing a channel set for dynamic channel allocation, and a system for performing the method. The method includes predicting a channel state and a channel quality on a vacant channel based on channel information that is obtained by spectrum sensing and communication protocol. The predicting includes modeling an occupation pattern of the vacant channel to calculate a probability in which an incumbent user (IU) licensed to use the vacant channel appears on the vacant channel. The method also includes evaluating reliability on the prediction result, and giving a priority to the vacant channel based on the evaluated reliability.

Abstract: A scan system receives signals within a band from an antenna and divides the band into sub-bands and scans the channels of each sub-band to determine a candidate channel based on the lowest figure of merit (FOM) and includes an on-channel selection block responsive to a received digital signal and operative to select only the on-channel frequencies and to substantially disregard the out-of-channel frequencies from the digital signal. The scan system generates a FOM on-channel signal representing a measurement of the signal quality of the on-channel signal and includes an out-of-channel selection block responsive to the digital signal and operative to select only the out-of-channel frequencies and to substantially disregard the on-channel frequencies from the digital signal and operative to generate a FOM out-of-channel signal representing a measurement of the signal quality of the out-of-channel signal.

Abstract: Managing use of a location sensor on a computing device for energy efficiency. The location sensor is briefly initialized to measure the signal quality. The measured signal quality is compared to pre-defined signal criteria values. The signal criteria values correspond to acceptable energy consumption, for example. If the signal criteria values are satisfied, location information for the computing device is obtained. Otherwise, the location sensor is disabled without obtaining the location information. In some embodiments, a lower-energy location sensor is used to obtain location information to determine whether to enable a higher-energy location sensor based on expected energy consumption.

Abstract: A display apparatus for use in a wireless terminal is provided. A memory stores user interface (UI) data for cases mapped to events occurring in the wireless terminal. A controller collects the events occurring in the wireless terminal. The controller selects at least one executable case for the collected events. The controller selects UI data including a character image for the at least one selected executable case from the memory and outputs the selected UI data. A display unit displays the UI data.

Abstract: A method and apparatus for spectrum access of secondary users in a cognitive radio system are provided. The method includes: estimating parameters of a primary channel according to the Markov model used by the primary channel; selecting a primary channel that has the largest available bandwidth according to the estimated channel parameters when multiple primary channels exist; detecting the selected primary channel; and accessing the primary channel to transmit data when the channel is idle. Therefore, an optimum primary channel can be selected from multiple primary channels by estimating channel parameters to satisfy high data transmission requirements and improve system performance.

Abstract: A method and apparatus for radio frequency (RF) fingerprint distribution is provided herein. In particular, when a mobile node wishes to access a restricted-access base station, the mobile node will access a database containing RF fingerprint identification information for the RF environment surrounding the restricted-access base station. When the RF environment matches the RF fingerprint, the mobile node will know that it can access the restricted-access base station.

Abstract: A method of transmitting feedback data in a multiple antenna system includes generating feedback data based on the channel information and transmitting the feedback data at transmission periods, wherein the feedback data is transmitted in a plurality of report types respectively having a different control signal type contained depending on the transmission periods.

Abstract: A method for acquiring positioning information includes receiving, at a mobile terminal (MT), downlink data in a plurality of downlink slot frames from a serving base station transmitting the downlink data over a first time period generally corresponding to the plurality of downlink slot frames. The MT experiences a relatively silent period during which the serving base station substantially ceases transmission to the mobile terminal during a second time period that defines a transmission power modification period. The MT also receives a preamble broadcasted by various neighbor base stations, the preamble broadcasted by such base stations occurring during a third time period which at least partially overlaps the second time period. The location or position estimate of the MT can be calculated based upon at least the preamble broadcasted by the neighbor base stations.

Abstract: A method of managing reception of data units transmitted from a radiocommunication network to a plurality of user equipments via a plurality of common upper level channels mapped to a same common lower level channel. The method comprises the following steps carried out by any user equipment of said plurality of user equipments: receiving a list of information relating respectively to each common upper level channel of said plurality of common upper level channels in a determined order, said information including no common upper level channel identifier; and setting a common upper level channel identifier for each common upper level channel of said plurality of common upper level channels according to the received list of information.

Abstract: Satellite communications systems, methods, and related devices are described. In one embodiment, a satellite communications system is configured to dynamically allocate bandwidth and frequencies among different beams. Bandwidth request data may be received and compiled from the terminals. The satellite may be configured with different beam coverage areas, and may dynamically allocate bandwidth and particular frequency channels to different beam coverage areas based on the requests. In each of a series of one or more epochs, and according to the bandwidth requests, there may be allocations among carrier groups, traffic classes, and particular terminals. The setup of slot structure and selection of modes for particular terminals is also addressed.

Abstract: A subband determining method, a base station, user equipment, and a communications system are provided. The base station of the present invention finds the subband size on the basis of a system bandwidth and divides the system bandwidth into subbands. The base station further selects some subbands to form a subband set and assign the subband set to user equipment and notifies the user equipment of information about the subband set. The user equipment in turn finds its corresponding subband size and the number of subbands for use in feedback on the basis of the size of the assigned subband set. The user equipment further divides the subband set into its corresponding subbands on the basis of a result found and feeds back information about a predetermined number of subbands to the base station. The base station carries out optimization of its transmitter on the basis of the information.

Abstract: A central registration system provides channel maps of available spectrum channels to radio devices. The channel map indicates relative noise floor amounts among the available channels. For this purpose, an amount of predicted interference caused by high-power protected transmitters on each channel available to the requesting radio device for wireless communications is determined, where interference from primary channel and out-of-band emissions of the transmitters is considered.

Abstract: Disclosed are method and apparatus for allocating radio resources. The method for allocating radio resource includes: determining, by a base station, a group of downlink sub-channels and transmission parameters related to the group of downlink sub-channels according to downlink channel characteristics and downlink interference characteristics of each resource block and a downlink bandwidth requirement of a terminal reported by the terminal, and transmitting the group of downlink sub-channels and the related transmission parameters determined to the terminal. The method and apparatus are able to allocate radio resources and determine transmission parameters based on user service requirement and system channel conditions, which greatly optimizes the system performances and improves efficiency.

Abstract: The present invention relates to reporting cell measurement results associated with a plurality of cells of a cellular communication system. The reporting is transmitted from a station via a radio interface to receiver element of a cell serving the station. The cells are arranged in a reporting order that is to be used by the station for the reporting. The cell measurements are performed by the transceiver station for getting cell measurement results associated with a number of the cells. Relevant cell measurement results are then selected and the selected results are transmitted in the defined reporting order.

Abstract: An UpLink (UL) control method and apparatus for in a wireless communication system supporting beamforming are provided. A method of a Mobile Station (MS) for UL control in the wireless communication system supporting the beamforming includes receiving a plurality of DownLink (DL) reference signals from a plurality of Base Station (BS) transmission beams using a plurality of MS reception beams having different directivity, measuring a path loss based on a reception signal strength of each of the plurality of DL reference signals received through different transmission/reception beams, selecting an MS transmission beam for uplink based on the path loss value measured for each of the plurality of DL reference signals, and transmitting a UL signal to a BS using the selected MS transmission beam.

Abstract: A method of operating a communication system is disclosed. A first wireless device associated with a first profile is communicated with using a first multi-antenna mode. A second wireless device associated with a second profile is communicated with using the first multi-antenna mode. A network resource utilization is determined. It is determined that the network resource utilization satisfies a criteria. Based on the network resource utilization satisfying the criteria, at least one control message is sent that instructs the second wireless device to use a second multi-antenna mode.

Abstract: According to one embodiment of the invention, a method for load balancing traffic in a wireless network includes identifying a respective operational parameter from wireless network devices in the wireless network. The respective operational parameter indicates a number of endpoint associations for the wireless network devices. The method also includes detecting a wireless network device with a particular number of endpoint associations by examining each of the respective operational parameters. The method further includes, in response to the detected wireless network device, configuring the wireless network device to limit the number of endpoint associations to a number less than the particular number.

Abstract: Methods and apparatus to schedule uplink transmissions in wireless communication systems, such as cellular communication systems, are disclosed. A disclosed example method comprises measuring channel conditions for a plurality of equipment devices at a base transceiver station of a wireless communication system, dividing an operating bandwidth of the base transceiver station into two or more non-overlapping portions, and instructing a first of the plurality of user equipment devices to transmit a sounding reference signal in a first non-overlapping portion during a sounding reference signal transmission interval.

Abstract: A method including: processing at a first processing frequency, such that each instance of processing is separated by a first processing time period, at least a first signal; increasing the processing frequency to a second processing frequency and switching from processing the first signal to processing a second signal; determining a parameter indicative of the quality of the second signal; and determining, within the first processing time period measured from the last instance of processing the first signal at the first frequency, which one or more signals to process at the next instance of processing by comparing respective parameters of at least the first and second signals.

Abstract: This invention relates to a method of searching for free band using a cognitive telecommunication terminal operating in a zone covered by a primary telecommunication system using a plurality of frequency bands (B). The terminal classifies said bands as a function of their conditional probabilities of being available (p(bmax|Bocc,Bopp)), knowing a first set of bands already occupied by the primary telecommunication system (Bocc) and a second set of bands not occupied by this primary telecommunication system but already used by another cognitive terminal (Bopp), said terminal beginning its search by the band with the highest conditional probability (bmax).

Abstract: A neighbor cell list optimizing system according to the present invention is a neighbor cell list optimizing system that updates a neighbor cell list that is provided in a base station that manages a cell to which a mobile terminal establishes a connection and to which specific neighbor cells that are candidates of a handover destination cell for said mobile terminal of neighbor cells that are in the vicinity of said cell are registered, comprising: priority computation section that computes priorities of said neighbor cells to be registered to said neighbor cell list based on measurement information that represents radio communication qualities of neighbor cells in which the measured radio communication qualities exceed a threshold; and neighbor cell list updating section that registers neighbor cells in descending order of the priorities up to an upper limit of radio cells that can be registered to said neighbor cell list.

Abstract: A method for operating a base station in a wireless communication system in order to support a plurality of propagation characteristics is provided. The method includes allocating resource periods for respective propagation characteristics, transmitting system information including information on the propagation characteristics, transmitting a reference signal with the propagation characteristic corresponding to the relevant resource period through at least one of the resource periods, and receiving feedback information determining channel qualities for all of the propagation characteristics.

Abstract: A connection destination base station determination device is disclosed that includes: a storage part configured to store information indicating a radio base station that has transmitted a signal received with intensity at or above a certain level in a mobile terminal, and information indicating the amount of available resources in the radio base station; a selection part configured to select, of radio base stations having the amount of available resources greater than or equal to the amount of resources requested by the mobile terminal, a radio base station different from a radio base station having the largest amount of available resources as a connection destination radio base station; and a notification part configured to notify the selected radio base station that the mobile terminal is to be connected thereto.

Abstract: A game system includes a plurality of game apparatuses that can carry out short-range wireless communication with one another. One of the game apparatuses functions as a parent apparatus, and at least one other game apparatus functions as a child apparatus. The parent apparatus transmits transmission verification data a predetermined number of times. Accordingly, the child apparatus receives the transmission verification data from the parent apparatus, and transmits to the parent apparatus the same number of pieces of reception verification data as those of the received transmission verification data. The parent apparatus receives the reception verification data from the child apparatus, and detects the number of the received pieces of reception verification data.

Abstract: In order to be able to flexibly and dynamically control the selection of an access network to be used by a mobile terminal, an assembly contains a cellular network which is provided with a core network and several access networks for connecting mobile terminals to the core network, and at least one mobile terminal. The mobile terminal is equipped with a decision unit at the terminal end to select the access network to be used by the mobile terminal while the cellular network encompasses a decision unit at the network end to select the access network to be used by the mobile terminal as well as a control device for controlling the decision unit located at the terminal end and at the network end.

Abstract: Methods and apparatus well suited to decentralized traffic scheduling in wireless peer to peer network are described. An individual wireless terminal corresponding to a peer to peer connection makes a transmitter yielding or receiver yielding decision for a traffic slot. Quality of service information is disseminated as part of the scheduling control signaling. A scheduling control signal, e.g., a traffic transmission request signal or a traffic transmission request response signal, includes a pilot portion and a quality of service information portion. The pilot facilitates the recovery of the quality of service information by a plurality of different devices which may have different channel conditions with respect to the transmitter of the scheduling control signal. The different devices may benefit from utilizing the recovered quality of service information in making a yielding decision regarding traffic signaling in a traffic segment.

Abstract: There are provided measures for cell search and synchronization. Such measures may exemplarily comprise acquiring an observation signal for a carrier signal on a carrier which is under consideration for synchronization with a desired cellular system, calculating a power measure of the observation signal, which indicates a received power of said carrier signal, calculating a non-circularity measure of the observation signal, which indicates a non-circularity of said carrier signal, and calculating a ranking measure, which indicates an applicability of said carrier for synchronization with the desired cellular system, based on the calculated power measure and the calculated non-circularity measure.

Abstract: A node may include a receiver configured to receive signals transmitted from a gateway and a logic device coupled to the receiver. The node may also include a memory configured to store label information identifying a data packet stored in the node. The logic device may be configured to receive a message from the gateway, where the message includes label information, and access the memory to identify a data packet based on the label information included in the message. The node may also include a transmitter configured to transmit the data packet to the gateway over a channel shared with a number of other nodes.

Abstract: An embodiment of the invention relates to a method of modifying communication parameters of a wireless network, the wireless network having at least two antennas, and each of the antennas providing coverage to at least one sector. The method including obtaining measurement data for at least two sectors of the wireless network, determining, from the obtained measurement data, if a signal strength indicator of one or more sectors of the at least two sectors is at or below a target value, determining, if the one or more sectors is at or below the target value, a communication parameter to be applied to the wireless network such that the signal strength indicator of the one or more sectors is above the target value, and modifying the communication parameters of the wireless network such that the determined communication parameter is applied to the wireless network.

Abstract: Systems and methods for scheduling wireless communications of a base station with multiple user mobile stations involve grouping the user mobile stations in clusters based on a predetermined criterion, such as a QoS profile of a user mobile station. Each cluster is assigned with a cluster weight factor that defines a priority level of the cluster. For each user mobile station in each cluster, a priority index may be determined based on the cluster weight factor of a respective cluster, and throughput and fairness factors respectively selected to maximize throughput and provide fairness to user mobile stations. The user mobile stations may be served in an order based on their priority indexes.

Abstract: Techniques are provided to improve the performance of wireless devices that serve wireless client devices in a wireless network in the presence of narrowband interference. The wireless device that serves wireless client devices in the wireless network receives energy in a plurality of channels of a frequency band. The received energy is analyzed for occurrence and type of interference in each channel. A quality metric is generated for each channel incorporating the occurrence and type of interference detected in the channel. For each channel, a bias value against selection of the channel is assigned based on whether narrowband interference is present in the channel. The bias value for each channel is applied to the quality metric for the channel to produce an adjusted quality metric for each channel. A channel is selected based on the adjusted quality metric for each of the plurality of channels.

Abstract: An RF transceiver of a first network device respectively receives first, second, and third coordinates of second, third, and fourth network devices. A control module determines first, second, and third delay periods respectively corresponding to transmissions between first and second, first and third, and first and fourth network devices. The control module determines first, second, and third distances between the first and second, first and third, and first and fourth network devices respectively based on the first, second, and third delay periods. The control module determines a location of the first network device based on the first, second, and third distances and the first, second, and third coordinates.

Abstract: A wireless communication device of the present invention receives a signal on a channel that another wireless communication device allocates to the wireless communication device from a plurality of channels. The wireless communication device includes: an update channel selector that selects a plurality of request channels that are candidates to be allocated to the wireless communication device from the channels, calculates a difference between a group of the request channels and a group of predetermined channels, and generates difference information indicative of the difference; and a multiplexer that multiplexes the difference information to a signal to be transmitted to the other wireless communication device.

Abstract: A system and method providing low-power operation in a multimode communication device. Various aspects of the present invention may, for example, include at least one radio module that is adapted to communicate in a plurality of communication modes. The at least one radio module may also be adapted to operate in at least a first power-save mode. At least one module may, for example, be adapted to analyze at least one non-informational aspect of a signal (e.g., a received radio signal) to determine whether a first communication network corresponding to a first communication mode of the plurality of communication modes might be available. The at least one module may then, for example, be adapted to determine, based at least in part on the determined availability of the first communication network, whether to operate the at least one radio module in a respective mode other than the first power-save mode.

Abstract: Route optimization is based on a network enforced, and mobile implemented, policy. A communication session between a mobile device and an access router is established. First and second IP addresses to be assigned to the mobile device are received by the mobile device via the established communication session, as is a set of rules. The mobile device evaluates at least one parameter of the communication session against the set of rules to determine which of the IP addresses to use to communicate with an external device, and proceeds to communicate with the external device using the selected IP address based upon the evaluation result.

Abstract: An encoded signal is modulated to produce a first radio frequency (RF) signal that is transmitted to a client module over a first transceiver channel when a first transceiver module is in a transceive mode. A channel scan is performed when the first transceiver module is in a scan mode. The encoded signal is modulated to produce a second RF signal and that is transmitted over a second transceiver channel when a second transceiver module is in a transceive mode.

Abstract: A method and device for determining an antenna cooperation set, and a method and device for determining a base station cooperation set in the mobile communication field are provided. The method includes that a signal joint processing system obtains the channel quality between a mobile terminal and at least two base stations, determines the base stations, which are corresponding to the channel quality higher than the channel quality threshold, as the cooperation base station set of the mobile terminal. Because the channel quality between the mobile terminal and the antenna of each base station is used to determine the cooperation antenna set dynamically, therefore, the determined cooperation antenna set includes the antennae that have very strong interference to the mobile terminal, or the antennae that have been strongly interfered by the mobile station.

Abstract: A wireless communication method and system using virtual MIMO (“V-MIMO”) are provided. Post processing signal to interference and noise ratios (“SINR”) for a plurality of signals corresponding to a plurality of mobile terminals arranged as a V-MIMO group are estimated. The one of the plurality of mobile terminals having the highest post processing SINR is selected. Wireless communication for the selected mobile terminal is scheduled. The signal corresponding to the selected mobile terminal is cancelled. Post processing signal to interference and noise ratios (“SINR”) for the signals corresponding to the remaining mobile terminals is re-estimated. The one of the remaining mobile terminals having the highest post processing SINR is selected. Wireless communication for the selected remaining mobile terminal is scheduled.

Abstract: Provided are an RFID operating system and an RFID system operating method for allowing multiple RFID readers to read tags without collision. The RFID system operating method includes the steps of grouping RFID readers spaced apart by more than a spacing distance capable of avoiding collision between RFID readers into a single group to determine at least one group, classifying RPM readers included in each group into at least one sub-group based on a read time of each RFID reader, and driving the RFID readers such that RPM readers belonging to at least two different sub-groups that do not collide with each other simultaneously operate. According to the present invention, switching is performed sub-group by sub-group to reduce the number of switching operations and sub-groups can simultaneously operate to decrease a read time.

Abstract: A method and apparatus for minimizing redundant enhanced uplink (EU) allocation requests and fault-isolating EU transmission failures that occur between a wireless transmit/receive unit (WTRU) and a Node-B. The WTRU transmits an enhanced dedicated channel (E-DCH) allocation request to the Node-B over an uplink (UL) EU channel. In one embodiment, if E-DCH allocation cannot be provided within a predetermined time period, the Node-B sends an acknowledgement message to the WTRU via a downlink (DL) EU signaling channel without sending E-DCH allocation information. The request is queued in the Node-B and the WTRU refrains from transmitting the same request until after the time period expires or resources become available. In another embodiment, appropriate actions are taken to correct EU transmission failures by determining whether an E-DCH allocation request was unsuccessfully delivered via the UL EU channel or whether channel allocation information was unsuccessfully delivered via the DL EU signaling channel.