Abstract: In a machine to machine (M2M) communication network comprising M2M application servers and M2M nodes such as M2M devices and gateways, applications that are specific to different M2M Service Providers (SPs) may be hosted. Different services are provided by different M2M Service Providers, while being hosted on a single Home Gateway, by the use of sensing and actuation equipment for different services. The home gateway may typically be owned by a home owner while some equipment may be services-specific and not owned by the home owner. Interfaces are provided enabling individual services providers to independently control resources allocated to their services hosted on the M2M node.

Abstract: Disclosed is a data transmission method in a mobile communication system. The data transmission method through a code sequence in a mobile communication system includes grouping input data streams into a plurality of blocks consisting of at least one bit so as to map each block to a corresponding signature sequence, multiplying a signature sequence stream, to which the plurality of blocks are mapped, by a specific code sequence, and transmitting the signature sequence stream multiplied by the specific code sequence to a receiver.

Abstract: Systems and methodologies are described that facilitate communicating PSC split information regarding neighboring cells. The PSC split information can be transmitted in one or more overhead messages selected based on network deployment. Where macro cells and femto cells provide PSC split information, which can be a PSC range for related cells, PSC list, etc., the information can be transmitted in a low priority overhead message since it can be obtained at a source cell. Where only femto cells or closed subscriber group (CSG) cells provide PSC split information, the information can be transmitted in a higher priority more frequently transmitted message. In this regard, the information is available at target cells since not all devices can access CSG cells. Thus, by providing the PSC split information in a more frequently transmitted message, devices can retrieve the PSC split information early on in communications to lower power consumption.

Abstract: The present application discloses a method, an apparatus and a system for exchanging common E-RGCH information. The method includes: receiving a common E-RGCH information message of a cell managed by a second RNC, where the common E-RGCH information message is sent by the second RNC; selecting a candidate common E-RGCH receiving neighboring cell set for the UE, where the candidate common E-RGCH receiving neighboring cell set includes a neighboring cell with an available common E-RGCH feature and the neighboring cell is determined according to common E-RGCH information message sent by the second RNC; and sending common E-RGCH configuration parameter information of each cell in the candidate common E-RGCH receiving neighboring cell set to the UE.

Abstract: A radio terminal, which has a function to collect and report measurement information designated by a radio network, comprises: means for receiving collection/reporting control information related to the radio terminal's execution of at least one of the collection of measurement information and the reporting of the measurement information to the radio network; and control means for executing, based on the collection/reporting control information, at least one of the collection and the reporting if execution determination information, which is related to at least one of the collection of the measurement information and the reporting of the measurement information to be executed by the local terminal, satisfies a given determination criterion.

Abstract: Link speed fluctuation reduction can be useful in a variety of communication systems. Such smoothing may have various benefits and may be achieved in various ways. For example, a policy and charging rules function can be leveraged to avoid repeated transfers of a same section of over-the-top video. A method can include detecting, for a link, a link traffic condition above a predetermined threshold. The method can also include estimating link speed to obtain an initial link speed value. When the detected link traffic condition is above a predetermined threshold, the method can further include limiting fluctuation of the link speed to within a threshold amount of the initial link speed value. The method can additionally include periodically re-estimating the recently achieved link speed as an updated link speed value and limiting the fluctuation based on the updated link speed value.

Abstract: A method of determining a soft buffer size for a transport block comprises determining a basic unit for the soft buffer size according to a legacy soft buffer size for the transport block and a first parameter, and determining the soft buffer size for the transport block according to the basic unit and a second parameter.

Abstract: Techniques are provided, which may be used for determining a position of a user equipment (mobile device). In certain example implementations, tones in positioning signals from one or more sources that may interfere with certain positioning signals be estimated and some form of interference mitigation may be applied, which may better enable the user equipment to acquire certain other positioning signals that may be useful in determining a position of the user equipment.

Abstract: Embodiments of the present disclosure describe apparatuses and methods for signal designs for device-to-device (D2D) subframes. Various embodiments may include a UE with a radio transceiver to communicate with another UE via D2D communications. The UE may further include processing circuitry to generate a cyclic prefix (CP) for a first or second symbol of a D2D subframe at an orthogonal frequency division multiplexing (OFDM) resource block or a single-carrier frequency-division multiple access (SC-FDMA) resource block. Other embodiments may be described and/or claimed.

Abstract: A security platform or network for transmitting end-to-end encrypted voice or data communications between at least a first digital device and a second device is disclosed. The network includes a network portal for registering the first digital device and the second device. The portal provides the first digital device and second device with at least first and second keys and receives requests from each device to communicate with each other. The portal searches for and receives authorization from the called device to set up a secure session with the calling device. The portal receives encrypted messages from the devices, decrypts the encrypted messages with the keys provided to the devices, and re-encrypts the received messages. The portal sends the re-encrypted messages to the other device. Accordingly, the devices are capable of securely communicating with each other by encrypting and decrypting the messages sent to and received from the portal.

Abstract: A method is carried out by a network node of a telecommunication network for deciding whether to change the state of a communication channel to a communication terminal. A characteristic of the traffic associated with the terminal is determined based on data collected in the network over a first time interval of length L. Then, based on the traffic characteristic, the traffic activity expected to be associated with the terminal during at least a second time interval of length L is predicted. The second time interval follows the first time interval. The network node then decides, based on the predicted traffic activity for the second time interval, whether to change the state of the communication channel. The invention also relates to a network node or set of network nodes for carrying such a method. The invention further relates to computer programs and computer program products.

Abstract: Embodiments of the present disclosure provide a method, an apparatus and a system for data connection management. The method for data connection management includes: obtaining, by a user equipment UE, first instruction information, wherein the first instruction information is used for instructing to close or open a data connection; and transmitting, by the UE, the first instruction information to a packet data network gateway P-GW, for enabling the P-GW to stop or start data transmission of at least one bearer of the UE according to the first instruction information. By adopting the embodiments, a traffic of a terminal is effectively controlled, thus an additional cost of a user is reduced.

Abstract: A communication apparatus in a multi-antenna wireless communication system is disclosed. In detail, the communication apparatus includes a first processor for processing a baseband signal defined as a first virtual antenna group, a second processor for mapping a signal defined as a second virtual antenna group and the baseband signal defined as the first virtual antenna group in order to remove coupling between antennas, and an antenna module for mapping the signal defined as the second virtual antenna group and a signal defined as a multiple physical antenna group.

Abstract: A system for performing Walsh reconstruction of time dependent fields with a quantum probe that includes a diamond structure that includes nitrogen-vacancy (NV) centers for sensing magnetic and electric fields. An arbitrary waveform generator and microwave waveguides manipulate the quantum spins in the diamond structure using a plurality of coherent control sequences to measure the arbitrary profile of time-varying magnetic fields. A laser that optically addresses the quantum spins in the diamond structure for initialization and readout.

Abstract: A method for a user equipment (UE) to receive a downlink signal. The UE receives a first downlink assignment including a first new data indicator (NDI) from a base station. The UE compares the first NDI to a second NDI and, based on a result of the comparison, determines whether the first NDI has been toggled. The UE receives the downlink signal and processes the received downlink signal based on whether the first NDI has been determined to be toggled. Furthermore, the second NDI is included in a second downlink assignment that was previously received from the base station and was not identified by a temporary cell identifier.

Abstract: One embodiment of the present invention provides a method for transmitting a signal in a terminal. The method for transmitting a signal in a terminal comprises the steps of: setting a maximum power reduction (MPR) value for signal transmission power, wherein the maximum power reduction value is independently set for a sounding reference signal (SRS), and the maximum power reduction value which is set for the SRS is different from a maximum power reduction value which is set for another signal; and transmitting the SRS with transmission power which is set according to the set maximum power reduction value.

Abstract: To improve probability of successfully performing transmission processing by a priority terminal and transmission processing of an emergency call even during congestion. A mobile communication method according to the present invention includes the steps of: causing a radio base station eNB to transmit “UE Context Release Request” regarding a predetermined mobile station UE to a mobility management node MME, the “UE Context Release Request” containing identification information of multiple target mobile stations UE; causing the mobility management node MME to release an access bearer of the predetermined mobile station UE in response to the “UE Context Release Request”, and transmit “UE Context Release Command” regarding the predetermined mobile station UE to the radio base station eNB, and causing the radio base station eNB to transmit “RRC Connection Release” to the plurality of target mobile stations UE.

Abstract: A method in a receiver includes receiving a signal that traversed a multipath channel having a channel response, so as to produce a received sequence of samples that are indicative of the channel response. Using a predefined similarity measure, multiple metrics between the received sequence of samples and multiple respective candidate sequences of samples are calculated by the receiver. Each candidate sequence includes a combination of one or more dominant signal components having respective sample delays, and each candidate sequence corresponds to a channel multipath candidate that has one or more channel paths at the respective sample delays. The channel response is estimated by the receiver, by selecting the candidate sequence that best matches the received sequence, the selecting being based on the similarity measure.

Abstract: A first communication device measures respective receive power levels of signals transmitted by second communication devices in a plurality of second communication devices. The first communication device selects a group of two or more second communication devices from the plurality of second communication devices for simultaneous transmission of respective data to the first communication device, wherein the group is selected i) so that respective measured receive power levels of the signals from any two second communication devices in the group differ by no more than a predetermined amount, and ii) without instructing any second communication device in the group to adjust a transmit signal power level. The first communication device generates a communication frame that includes information indicative of the group, and transmits the communication frame to prompt the group to simultaneously transmit respective data to the first communication device.

Abstract: A system for and method of communication information transmission are provided. A method of communication information transmission performed by a first device includes: receiving a communication request from a second device; obtaining surrounding situation information of the first device, the surrounding situation information including information related to surroundings of the first device; and determining at least one third device to process the communication request based on the surrounding situation information.

Abstract: A control channel supporting traffic control in epochs is divided into two control subchannels each being less than or equal to about a half epoch in duration and occurring serially in time. Slot allocation data may be transmitted and received independently over the subchannels. One subchannel may be used for transmitting forward slot allocation data and the other subchannel may be used for transmitting reverse slot allocation data. The channel split into two subchannels may be a paging channel. The forward and reverse slot allocation data may be transmitted between a base station processor and field unit. Forward and reverse traffic data may be staggered by at least about half an epoch. Transmission of traffic data happens within about two epochs after the assignments.

Abstract: Methods, systems, and devices are described for transmitting across a broad azimuth using an antenna array. In one example, a method is described that includes forming two subarrays from an antenna array. Beamforming weights are selected for each subarray to cause the radiation patterns to be complementary over a range of the azimuth of a cell. The beamforming weights may be selected according to a recursive relation based on the number of antenna elements in each subarray. Information may be encoded, scrambled, and mapped to modulation symbols. A Space Frequency Block Code (SFBC) such as an Alamouti Code may then be used to form two signals to be transmitted over the two subarrays.

Abstract: The invention relates to a method, apparatus and system for configuring control channels in a mobile communication network and a mobile station. In order to suggest another improved scheme for configuring control channels, in particular control channels related to the transmission of user data the invention suggests aligning the size of the control channel information of different formats to an equal number of coded control channel information bits and/or modulation symbols for each control channel. The control channels may comprise scheduling related control information. According to another aspect of the invention, the size of the control channel information is aligned by means of modulation and/or coding, however the control channel information is aligned to one out of a set of numbers of coded control channel information bits and/or modulation symbols for each control channel.

Abstract: A system and method for facilitating resource management in OFDM systems is provided. The system permits different and flexible resource cell metric operations levels (e.g. uplink load management, admission control, congestion control, signal handoff control) for different sub-bands. For the uplink load management, there are multiple distinct load operation points (e.g. IoT, RoT) per sub-band group instead of the same operation level across the entire available band. The sub-band groups encompass the entire band. The facilitation system also comprises a variety of transmitting protocols, command increment variable stepsize methods and robust command response methods. The system thus provides more flexible reverse link resource management and more efficient utilization of the bandwidth.

Abstract: An improved technique for detecting the presence or absence of one or more predetermined signals in a shared spectrum. In accordance with the disclosed embodiments, a received RF signal may be down-converted to a baseband signal, which is subsequently processed by a spectrum sensor to detect the presence or absence of a predetermined signal, such as a predetermined radar signal. The spectrum sensor may transform the baseband signal to the frequency domain, for example using a fast Fourier transform, to generate a corresponding set of frequency components. The spectrum sensor multiplies the frequency components of the baseband signal with the frequency response of a matched filter having a set of coefficients corresponding to the predetermined signal. The spectrum sensor may convert the matched-filter output signal to the time domain, for example using an inverse fast Fourier transform, and then may determine a value indicative of the signal power that it compares with a known threshold value.

Abstract: A method and apparatus for establishing a device-to-device (D2D) connection in a wireless communication system is provided. A first mobile device may transmit an identity of a network node to a second mobile device. In this case, the first mobile device and the network node are connected by a first connection, and the first mobile device and the second mobile device are connected by a second connection. Or, a base station may transmit information on a D2D connection between mobile devices which are connected to the base station, to a neighboring network node. The information on the D2D connection includes at least one of information on the mobile devices, and a D2D mode.

Abstract: Techniques for performing WLAN system scanning and selection are described. A terminal performs multiple iterations of scan to detect for WLAN systems. A scan list containing at least one WLAN system to detect for is initially determined. For each scan iteration, a scan type may be selected from among the supported scan types. The selected scan type may indicate passive scan or active scan, frequency channels to scan, etc. A scan may be performed based on the selected scan type. Signal strength measurements are obtained for access points received during the scan and used to identify detected access points. After all scan iterations are completed, candidates access points are identified based on the scan results, e.g., based on the signal strength measurements for the detected access points and a detection threshold. The best candidate access point may be selected for association by the terminal.

Abstract: In a network (700, 800) with a plurality of cells (715, 815, 825), there may be interference couplings among the cells (715, 815, 825). This may be particularly true for heterogeneous networks (800). For radio resource scheduling in such network (700, 800), a semi-decentralized scheduling is proposed in which radio resource scheduling issue is reformulated as load scheduling issue. In the proposed semi-decentralized scheduling, portions of the total load or available headroom are centrally allocated to each local node (710, 810, 820) subject to the stability of the network (700, 800). At each local node (710, 810, 820), radio resources are granted to users (740, 840) of that local node (710, 810, 820) subject to the portion of the load or headroom allocated to that local node (710, 810, 820).

Abstract: An access point (e.g., a femto cell) that is connected in an active call with an access terminal may cooperate with that access terminal or another access terminal to derive timing information from one or more neighboring access points (e.g., macro access points). In addition, an access point may cooperate with an idle access terminal to derive timing information from one or more neighboring access points. For example, an access terminal may determine the difference between pilot transmission timing or frame transmission timing of a femto cell and a macro cell, and report this timing difference to the femto cell. Based on this timing difference, the femto cell may adjust the timing and/or frequency of its transmissions so that these transmissions are synchronized in time and/or frequency as per network operation requirements.

Abstract: A method for decoding a symbol transmitted over a millimeter wave (mmWave) channel estimates channel state information (CSI) of the mmWave channel using a Bayesian inference on a test symbol according to a probabilistic model of the mmWave channel including statistics on paths and spread of mmWaves propagating in the mmWave channel and decodes a symbol received over the mmWave channel using the CSI.

Abstract: Resource mapping and coding schemes to handle bursty interference are disclosed that provide for spreading the modulated symbols for one or more transmission code words over more symbols in the time-frequency transmission stream. Certain aspects allow for the modulated symbols to be based on bits from more than one code word. Other aspects also provide for re-mapping code word transmission sequences for re-transmissions based on the number of re-transmissions requested by the receiver. Additional aspects provide for layered coding that uses a lower fixed-size constellation to encode/decode transmissions in a layered manner in order to achieve a larger-size constellation encoding. The layered encoding process allows the transmitter and receiver to use different coding rates for each coding layer. The layered encoding process also allows interference from neighboring cells to be canceled without knowledge of the actual constellation used to code the interfering neighboring signal.

Abstract: A method of transmitting data from a UE to an eNB is provided. In response to a data transmission request from a MTC application, the UE chooses a preamble ID based on the data size and transmits a random access preamble message to the eNB. The eNB returns a random access response message to the UE. The random access response message identifies resource allocated in an uplink channel and includes one or more transmission power control parameters associated with the second uplink channel. After determining that the data size is less than or equal to the allocated resources in the second uplink channel, the UE transmits a scheduled transmission message to the eNB using the allocated resource in the second uplink channel at a transmission power level determined by the one or more transmission power control parameters.

Abstract: A system and method are provided that implement an inter-protocol adaptation layer (inter-PAL) pass-through processing scheme in wireless communicating devices operating with separate PALs to combine use of the individually-beneficial features of one PAL by allowing a first order capability for cross-talk between the PALs. A first PAL data packet is passed through the communicating system using a second PAL syntax. In so doing, a capacity to employ beneficial features of the second PAL advantageously in enhancement of the information in a data packet generated according to the first PAL is provided.

Abstract: A communication system according to an embodiment includes: a cellular base station; and a wireless local area network (WLAN) management apparatus configured to manage one or more WLAN access points. The WLAN management apparatus is used for a cellular-WLAN aggregation in which data of a user terminal is transmitted and received using both a cellular communication and a WLAN communication while the user terminal maintains a radio resource control (RRC) connection with the cellular base station. A direct communication path bypassing a core network is established between the cellular base station and the WLAN management apparatus.

Abstract: A vehicle-to-vehicle communication device generates voice information that includes a voice message and added information regarding an output of the voice message. The voice information is transmitted in one direction of a subject vehicle via a transmission unit, and voice information from another vehicle is received via a reception unit. The vehicle-to-vehicle communication device plays the voice message of the voice information received by the reception unit based on the added information of the voice information. In such manner, information regarding a travel situation is appropriately transmitted by the vehicle-to-vehicle communication device.

Abstract: An apparatus and method for detecting a burst signal. The apparatus includes circuitry that concatenates a predetermined number of samples and transmits the samples to a first programmable memory tap of a predetermined number of programmable memory taps. For each memory tap, a corresponding partial correlation is computed. A normalized sum of all the partial correlations is multiplexed and transmitted to a predetermined number of multipliers. A peak of the burst signal is determined by computing a summation of the complex multiplications of each multiplier, wherein the determined peak corresponds to a start of the burst signal.

Abstract: Provided are a method and apparatus for user equipment (UE) selection in a mobile communication system. The method may include: selecting the n?1th UE in multiple cells (n: constant ?2); and selecting a UE with the maximum weighted sum rate (WSR) as the nth UE from among UEs belonging to the remaining cells excluding those cells containing the 1st to n?1th UEs. Hence, the scheduling function enabling suitable user equipment selection may further increase overall system throughput by providing additional gains in addition to beamforming, i.e. further reducing inter-cell interference and increasing signal strength toward a desired user equipment.

Abstract: Methods, systems, and devices are described for managing network communication between a UE and network equipment. The communication between the UE and the network equipment may be established over a first radio access technology (RAT) and a second RAT, and a coupling between the first RAT and the second RAT may be identified in the communication between the UE and the network equipment. At least one of a reselection procedure or a handover procedure for at least one of the RATs may be adapted based on the identified coupling between the first RAT and the second RAT.

Abstract: A method for operating a transmitting device using semi-orthogonal multiple access (SOMA) in a wireless local area network (WLAN) includes determining a first quadrature amplitude modulation (QAM) bit allocation, a first coding rate, and a first SOMA group for a first receiving device and a second QAM bit allocation, a second coding rate, and a second SOMA group for a second receiving device in accordance with channel information associated with the first receiving device and the second receiving device, generating a frame including indicators of the first and second QAM bit allocations, the first and second coding rates, and the first and second SOMA groups, and sending the frame to the first receiving device and the second receiving device.

Abstract: A method and an apparatus for simultaneously receiving on two carriers and performing discontinuous transmission (DTX) and discontinuous reception (DRX) in dual cell high speed downlink packet access (DC-HSDPA) are disclosed. A wireless transmit/receive unit (WTRU) receives a message for activating DRX for at least one of an anchor carrier and a supplementary carrier and applies the same DRX pattern to the anchor carrier and the supplementary carrier upon reception of the message. The message may be received via a high speed shared control channel (HS-SCCH) order. The WTRU may activate or de-activate the supplementary carrier based on the physical layer signal. Upon activation of the supplementary carrier, the WTRU may apply the same DRX pattern on both the anchor carrier and the supplementary carrier. The WTRU may flush a hybrid automatic repeat request (HARQ) buffer associated with the supplementary carrier upon de-activation of the supplementary carrier.

Abstract: A PHY auto-negotiation and link up procedure for Ethernet Passive Optical Network Over Coax (EPOC) is provided. The procedure is compliant with the Ethernet Passive Optical Network (EPON) standard and can be used to bring an EPOC network to user traffic readiness. In addition, the procedure, or a variation thereof, can be used to enable periodic maintenance of the coaxial link of the EPOC network, thereby maintaining adequate communication conditions.

Abstract: Embodiments related to retransmission in a communication system are described and depicted. In one embodiment, a retransmission entity repeats a transmission of a data transfer unit by the device after a predetermined number of other transmitted data transfer units has been transmitted. The retransmission entity may also determine whether a measure for a time period since the first transmission of the data transfer unit by the device has exceeded a predetermined threshold and to provide a final transmission of the data transfer unit based on the determining that the measure for the time period has exceeded the predetermined threshold.

Abstract: A space division multiple access (SDMA) method is provided. The method may be performed by a station (STA), in a wireless local area network (WLAN) system. The method includes overhearing a third transmission response message transmitted by an access point (AP), and determining whether to access a channel on the basis of criteria information included in the third transmission response message.

Abstract: Disclosed are a method, device, and a computer storage medium for component carrier allocation. The method includes that when it is determined that a component carrier which has a frequency exceeding a preset threshold exists in component carriers which are available to be allocated currently in a cell, a FDM of UE in the cell is updated according to the coverage of the component carrier which has a frequency exceeding the preset threshold; and frequency domain priority is determined according to the updated FDM, and the component carrier which has a frequency exceeding the preset threshold is allocated for the UE in the cell according to the frequency domain priority.

Abstract: According to the present disclosure, a base station may be configured to serve a user equipment device (UE) over two or more beams using different modulation and coding schemes (MCSs) in response to determining that another base station is concurrently serving another UE at nearly the same location. For instance, a first base station may initially serve a first UE over two beams using the same MCS on both beams. The first base station may then determine that a second base station is serving a second UE at nearly the same location. And in response, the first base station may then change the MCS on at least one of the two beams so that the first base station then serves the first UE using different MCSs on the two beams. Serving the first UE with different MCSs concurrently on multiple beams may help to improve the first UE's reception.

Abstract: A communication system is disclosed in which each base station is configured to provide synchronizations signals in each radio frame of both a primary (backwards compatible) component carrier and a secondary (extension) component carrier. The location of the synchronization signals in the radio frame of the primary (backwards compatible) component carrier are fixed whilst the location of the synchronization signals in the radio frame of the secondary (extension) component carrier are configurable.

Abstract: A method includes estimating the position of the moving object on the basis of the reception of navigation signals emitted by a constellation of satellites, the navigation signals being modulated by a code and the receiver comprising a local replica of the code. The determination of the confidence indicator consists in estimating a speed of displacement of the receiver over an identified trajectory segment, deducing therefrom a Doppler delay function corresponding to the motion of the receiver, in correcting the auto-correlation function of the GNSS navigation signal received from each satellite of the constellation by means of the delay function, in comparing the corrected auto-correlation function with a theoretical auto-correlation function by applying a quadratic criterion corresponding to the confidence indicator.

Abstract: Generally discussed herein are systems, apparatuses, and methods for creating message traffic. In one or more embodiments, a method can include receiving message characteristics of a plurality of messages to transmit to a device and transmitting, using processing circuitry, the plurality of messages to the device, wherein the plurality of messages are configured to replicate message traffic that includes the received message characteristics. The message characteristics can include a message pattern, a message density (e.g., high burstiness, low burstiness, or consistent traffic density), a message size, a message type, a message inter-arrival time, or other message characteristic.

Abstract: A mobile station receives a neighbor list from a base station in an area of a public wireless network that borders a private wireless network. The neighbor list includes encrypted channel identifiers corresponding to private network channels transmitted by the private wireless network and unencrypted channel identifiers corresponding to public network channels transmitted by the public wireless network. If the mobile station does not subscribe to the private wireless network, the mobile station does not recognize the encrypted channel identifiers and simply ignores them. However, if the mobile station subscribes to the private wireless network, the mobile station decrypts the encrypted channel identifiers and determines whether it is able to initiate a handoff to any of the corresponding private network channels.

Abstract: Methods, user equipment and controlling node for handling of stream restriction of the user equipment in a cellular communications system supporting four branch Multiple Input Multiple Output (MIMO) are disclosed. The user equipment supports one or more MIMO modes associated with four branch MIMO and one or more of a single stream restriction, a dual stream restriction and no restriction. The controlling node controls a base station. The user equipment signals at least one of said supported MIMO modes to the controlling node that determines one of said at least one MIMO modes to be used by the user equipment. The controlling node sends, to the user equipment, a mode instruction instructing the user equipment to use the determined MIMO mode.