Nec Europe Ltd.

Nec Corporation

Xavier Perez Costa

Daniel Camps Mur

Anatolij Zubow

Julio Arauz

Peter Rost

Andreas Maeder

Marco Liebsch

Roberto De Marca

Johannes Marotzke

Paolo Favaro

Marco Mezzavilla

Manil Gomony

Method for operating a wireless network, wherein at least one MIMO (Multiple Input Multiple Output) group of different stations will be constructed by a grouping algorithm based on a grouping metric for providing a MIMO group of different stations addressable simultaneously in space by a base station using MIMO techniques and meeting a definable level of performance quality, the grouping metric being based on an SINR (Signal-to-Interference and Noise Ratio) experienced by each station within the MIMO group. The method includes: computing an SNR (Signal-to-Noise Ratio) that a new station would experience without any interference when added to an existing MIMO group; computing an SINR estimate by correcting the SNR with the sum of spatial correlations between the new and each of the stations already present in the existing MIMO group; and using the SINR estimate for deciding whether the new station can be added to the existing MIMO group.

Method for operating a wireless network, a wireless network and a device

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&#x2014;time and frequency&#x2014;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.

Method of assembling a frame in an orthogonal frequency division multiple access (OFDMA)-based communication system and communication system

A method for operating a mobile terminal as access point, wherein the access point composes a network together with one or more associated client stations, wherein the access point has an operational mode of alternating awake and sleep periods, and wherein the access point broadcasts beacon frames at regular intervals for signaling communication parameters to the associated client stations, is characterized in that the access point, based on the level of activity in the network, adjusts the communication parameters by slowing down or accelerating the access of the associated client stations to the network. Furthermore, a corresponding mobile terminal is disclosed.

Method for operating a mobile terminal as access point and mobile terminal

A method for controlling the admission of a flow to a network, particularly a WiMAX (Worldwide Interoperability for Microwave Access) network, wherein an estimation of maximum capacity required within a link of the network and/or within the network will be performed for examining, whether the flow requesting to enter the network with at least one QoS (Quality of Service) reservation of resources can be admitted, by finding first sets of intersections between all pairs of QoS reservations, i.e. the QoS reservations already accepted within the link and/or within the network and the at least one QoS reservation requested by the flow. The method is characterized by structuring the found sets of intersections by building a matrix of intersections of QoS reservations and&#x2014;based on the matrix&#x2014;deriving the rest of the sets of intersections between the intersections found, based on information obtained regarding the QoS reservations involved in each intersection.

Method for controlling the admission of a flow to a network and a network

A method for operating a wireless terminal as an access point&#x2014;access point terminal ()&#x2014;that connects a set of one or more client terminals () to an external network, wherein a schedule of absence periods is established during which the connected client terminals () are not allowed to transmit data to the access point terminal (), wherein the absence periods together with corresponding presence periods are scheduled at regular intervals and have certain durations, is characterized in that an adaptation of the absence/presence periods' duration and/or interval parameters is executed on the basis of the bandwidth available in the external network and the amount of traffic transmitted between the access point terminal () and the connected client terminals (). Furthermore, a corresponding wireless terminal is disclosed.

Method for operating a wireless terminal as an access point and wireless terminal

A communication network, wherein the network includes a plurality of communication elements that function as transmitters and/or receivers, in particular base stations and operating nodes being associated to at least one of the base stations, wherein the communication between the transmitters and the receivers is performed by way of generating and transmitting signals based on a multi-carrier modulation with a number of N subcarriers around a carrier frequency f, is characterized in that the communication elements are configured to perform, upon receiving a transmitted signal, a sub-sampling of the received signal, wherein only a predetermined number of the inner-most subcarriers around the carrier frequency fare employed for data reconstruction. Furthermore, a respective method for operating a communication network is described.

Communication network and method for operating a communication network

In order to allow an efficient use of data or frame aggregation techniques with real-time communications a method for operating a wireless network, especially a Wi-Fi technology based network, is described, wherein the network includes at least one wireless device for transmission of data and wherein the device may use a data or frame aggregation technique to provide an adjustable amount of aggregation. The method is characterized in that the amount of aggregation provided by the aggregation technique will be adjusted depending on a level of congestion in the network. Further, an according wireless network is described, preferably for carrying out the above mentioned method.

Method for operating a wireless network and a wireless network

A method of scheduling periodic processes for execution in an electronic system, in particular in a network, in a data processor or in a communication device, wherein the electronic system includes a controller for performing the scheduling, wherein a number of N processes Pare already scheduled with each process Phaving an individual service interval Sl, and wherein an additional process Pis to be scheduled with a service interval SI, is characterized in that the additional process Pis scheduled in such a way that the minimum time lag between the execution times of the additional process Pand the execution times of the number of N already scheduled processes Pis maximized. Furthermore, a corresponding device for scheduling periodic processes for execution in an electronic system is disclosed.

Method and system for scheduling periodic processes

A method for filling a WiMAX downlink frame by the base station of a WiMAX network, wherein the downlink MAC Protocol Data Units (MPDUs) are fitted into the WiMAX downlink frame by means of a DL-MAP scheduler, which allows the concatenation of downlink MPDUs from different connections in single bursts, the bursts having a rectangular shape in terms of the two dimensions&#x2014;OFDMA (Orthogonal Frequency Division Multiple Access) symbols and subchannels&#x2014;of a WiMAX downlink frame, is characterized in that the DL-MAP scheduler is configured in a way that it considers the concatenation of downlink MPDUs from different connections in single bursts based on the available and/or the remaining free space in the WiMAX downlink frame, such that it simplifies the DL-MAP scheduler task of filling the WiMAX downlink frame minimizing the amount of wasted radio resources.

Method for filling a WiMAX downlink frame by the base station of a WiMAX network

A method for controlling the communication with mobile stations in a network, preferably in a WLAN (Wireless Local Area Network) according to the IEEE 802.11 standard, wherein the network comprises access points through which the mobile stations are associated with the network and wherein the mobile stations can be set to power save mode is&#x2014;with respect to an especially energy-efficient operation of the mobile station-designed in such a way that paging signaling is performed in order to locate a mobile station.

Growing community of inventors

Heidelberg, Germany

Xavier Perez Costa