Patent application number | Description | Published |
20100015988 | Method and Arrangement for Allocating Radio Resources in a Communication System - The present invention relates to a method and an arrangement of facilitating the allocation of radio resources in a communication network, comprising a communication network node ( | 01-21-2010 |
20100039990 | Method and Arrangement in a Wireless Communications System - A method for assisting the adaptation of a signal from a first node ( | 02-18-2010 |
20100046650 | Method for Precoding Using a Block Diagonal Matrix - An objective problem of the invention is to provide a mechanism for improving the performance of a radio access network. According to a first aspect of the present invention, the object is achieved by a method in a first node for adapting a multi-antenna transmission to a second node over an effective channel. The first node and the second node are comprised in a wireless communication system. The method comprises the steps of obtaining at least one symbol stream and determining a precoding matrix having a block diagonal structure. The method comprises the further steps of precoding the at least one symbol stream with the determined precoding matrix, and transmitting the at least one precoded symbol stream over the effective channel to the second node. | 02-25-2010 |
20100099362 | Calibration Method and Device in Telecommunication System - A device system, computer medium and method for calibrating at least one impairment of a signal transmitted from a transmitting unit to a receiving unit, the method including receiving at the receiving unit at least two signals transmitted from the transmitting unit, estimating at the receiving unit, based on the received at least two signals, at least one parameter associated with transmit chain links between the transmitting unit and corresponding antennas of the transmitting unit, collecting the at least one parameter in a measurement report at the receiving unit, and transmitting the measurement report from the receiving unit for correcting the at least one impairment based on the at least one parameter. | 04-22-2010 |
20100104037 | Method And Device For Interference Suppression In User Terminal - A user terminal [ | 04-29-2010 |
20100120441 | INCREASING A SECTORIZATION ORDER IN A FIRST SECTOR OF AN ANTENNA ARRAY - A mechanism for increasing a sectorization order in a first sector of an antenna array. The object is achieved by a method in a network node. The network node and antenna array are comprised in a wireless communication system. The antenna array is deployed with a first sectorization. The network node comprises a first number of signal connections. Each signal connection is adapted to transmit and receive signals. The method comprises the step of splitting the first number of connections into a number of groups. Each one of the respective connection groups corresponds to one respective virtual sector resulting in a number of virtual sectors. The method further comprises the step of mapping the number of virtual sectors to the first sector, such that the first sector is split into the number of virtual sectors. | 05-13-2010 |
20100281333 | FEEDBACK WITH UNEQUAL ERROR PROTECTION - Methods and devices provide a feedback message having unequal error protection. The feedback message may include channel quality indicators. The channel quality indicators may have different levels of error protection based on a transmission property. | 11-04-2010 |
20100284483 | PRECODER FOR SPATIAL MULTIPLEXING, MULTIPLE ANTENNA TRANSMITTER - A transmitter ( | 11-11-2010 |
20100284484 | OPEN LOOP PRECODER CYCLING IN MIMO COMMUNICATIONS - Data is transmitted over multiple input multiple output (MIMO) channels. Plural bit streams are modulated into multiple data symbol vectors. Each vector has a transmission rank with one vector for each MIMO channel. Transmission rank is the number of elements in a data symbol vector corresponding to the number of data streams being transmitted in parallel over each MIMO channel. The multiple data symbol vectors are preceded into multiple precoded symbol vectors using a plurality of precoder cycling sets, one set for each transmission rank including multiple different precoders. The precoders in each precoder cycling set are well-separated with respect to a plurality of distance measures. The precoding includes precoding each data symbol vector of a transmission rank with a precoder belonging to the precoder cycling set of that transmission rank. The precoded symbol vectors are then transmitted over the MIMO channels. | 11-11-2010 |
20110080969 | MULTI-GRANULAR FEEDBACK REPORTING AND FEEDBACK PROCESSING FOR PRECODING IN TELECOMMUNICATIONS - A communications system comprises a second device ( | 04-07-2011 |
20110116448 | SUPPORT FOR RETRANSMITTING A TRANSPORT BLOCK WITH A DIFFERENT NUMBER OF LAYERS THAN A PREVIOUS TRANSMISSION ATTEMPT - A method of conveying transport block size (TBS) information includes determining TBS parameters for a wireless transmission of data between a first node and a second node based on a first number of transmission layers associated with the wireless transmission. The method also includes generating a control message indicating the TBS parameters and transmitting the control message to the second node. The method also includes transmitting a transport block to the second node in accordance with the TBS parameters indicated by the control message. The transport block is transmitted over a first number of transmission layers. The method also includes retransmitting the transport block to the second node in accordance with the TBS parameters indicated by the control message. The transport block is retransmitted over a second number of transmission layers that differs from the first number of transmission layers. | 05-19-2011 |
20110122819 | METHODS AND ARRANGEMENTS IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to methods and arrangements in a wireless communication system that enable the use of multi-codeword transmission and ACK/NACK compression with low performance loss. It also enables the use of advanced receivers of reasonable complexity. This is achieved by a solution based on the even distribution of the symbols of separately coded blocks of information bits over the available physical resources before transmission. Each physical resource will thus carry a mixture of symbols from all blocks of information bits, which results in a more similar channel quality for the blocks of information bits. A compressed ACK/NACK message corresponding to the blocks of information bits will thus be more accurate and the performance loss due to the ACK/NACK compression can be reduced. | 05-26-2011 |
20110122968 | Method and Apparatus for using Factorized Precoding - According to one or more aspects, the teachings herein improve user equipment (UE) Channel State Information (CSI) feedback, by letting the precoder part of a CSI feedback report comprise factorized precoder feedback. In one or more such embodiments, the factorized precoder feedback corresponds to at least two precoder matrices, including a recommended “conversion” precoder matrix and a recommended “tuning” precoder matrix. The recommended conversion precoder matrix restricts the number of channel dimensions considered by the recommended tuning precoder matrix and, in turn, the recommended tuning precoder matrix matches the recommended precoder matrix to an effective channel that is defined in part by said recommended conversion precoder matrix. | 05-26-2011 |
20110176517 | Antenna Port Mapping for Demodulation Reference Signals - The present invention provides a unified, rank independent mapping between antenna ports and group/code pairs. Each antenna port is uniquely associated with one code division multiplexing (CDM) group and one orthogonal cover code (OCC). The mapping between antenna ports and group/code pairs is chosen such that, for a given antenna port, the CDM group and OCC will be the same for every transmission rank. | 07-21-2011 |
20110200135 | Signaling of Precoder Related Information in a MIMO System - Techniques are disclosed for signaling a pattern of cyclic shifts and orthogonal cover codes for use by a wireless device in multi-layer transmissions. In one example method, a signal includes B bits for identifying a reference signal is received, wherein each of several available reference signals is defined by a cyclic shift and an orthogonal cover code. The B bits are used to identify the cyclic shift and orthogonal cover code according to pre-determined tables that map each value of the B bits to a pattern of cyclic shift and orthogonal cover code combinations for a multi-layer transmission scheme. The patterns for the multi-layer transmission scheme include first and second patterns based on the same cyclic shifts, but where some, but not all, of the cyclic shifts in the first pattern are associated with the same corresponding orthogonal cover codes in the second pattern. | 08-18-2011 |
20110201376 | METHOD AND ARRANGEMENT FOR ADAPTING POWER OF REFERENCE SIGNALS - A method and an arrangement in a radio network node for adapting transmission power of resource elements for demodulation reference signals, referred to as “reference elements” are provided. The radio network node is configured for multiple-input multiple-output transmission, referred to as “MIMO transmission”, to a user equipment. The MIMO transmission comprises at least three layers. Two consecutive subcarriers of a resource block carry at least three reference elements. A first subcarrier of the resource block carries data elements. The radio network node adapts transmission power of said at least three reference elements such that an average transmission power, over said two consecutive subcarriers, of said at least three reference elements is equal to a transmission power, for the first subcarrier, of the data elements for said at least three layers. The radio network node uses the adapted transmission power to transmit, to the user equipment, said at least three reference elements. | 08-18-2011 |
20110205930 | Method for Transmitting of Reference Signals and Determination of Precoding Matrices for Multi-Antenna Transmission - Techniques are disclosed for determining transmitter antenna weights at a base station ( | 08-25-2011 |
20110211628 | CHANNEL-ASSISTED ITERATIVE PRECODER SELECTION - As a basis for precoder quantization, a channel matrix representing multi-antenna channel characteristics between a transmitter and a receiver in the mobile communications network is estimated (S | 09-01-2011 |
20110243272 | Precoder Codebooks for Effective Channels with Structured Frequency-Selectivity - A precoder for an effective channel linking a wireless receiver to a wireless transmitter includes a precoder report and a precoder update report, the effective channel including a propagation channel, transmit filters and receive filters. A structured frequency-selectivity of the effective channel is determined, the structured frequency-selectivity being induced by one or more long term and/or persistent parameters of the effective channel. The precoder update report is generated based on the structured frequency-selectivity. The precoder update report includes frequency-dependent phase compensation which accounts for the structured frequency-selectivity. The precoder report is generated for the effective channel based on channel state information determined for the effective channel. The precoder report and the precoder update report are transmitted to the wireless transmitter. The transmitter determines a transmission operation based on the precoder report and the precoder update report, and transmits data to the wireless receiver in accordance with the transmission operation. | 10-06-2011 |
20110249637 | Parameterized Codebook Subsets for use with Precoding MIMO Transmissions - One aspect of the teachings presented herein provides advantages for sending precoder selection feedback from a transceiver to another transceiver, for use by the other transceiver as precoding recommendations. The transceiver generates two types of precoder selection feedback, where one type uses a smaller signaling payload than the other and therefore provides a distinct reduction in the signaling overhead associated with reporting precoding recommendations. The transceiver uses the reduced-overhead type of reporting when reporting at certain times, or on certain channels, or in response to control signaling. In one example, a UE in an LTE network sends precoder information to an eNodeB on the PUCCH by sending smaller-range index values that index only a subset of precoders, but sends full-range index values when reporting on the PUSCH, which index a larger set of precoders. | 10-13-2011 |
20110249712 | Precoder Structure for MIMO Precoding - The teachings herein present a method and apparatus that implement and use a factorized precoder structure that is advantageous in terms of performance and efficiency. In particular, the teachings presented herein disclose an underlying precoder structure that allows for certain codebook reuse across different transmission scenarios, including for transmission from a single Uniform Linear Array (ULA) of transmit antennas and transmission from cross-polarized subgroups of such antennas. According to this structure, an overall precoder is constructed from a conversion precoder and a tuning precoder. The conversion precoder includes antenna-subgroup precoders of size N | 10-13-2011 |
20110249713 | Parameterized Codebook with Subset Restrictions for use with Precoding MIMO Transmissions - One aspect of the teachings herein relates to signaling codebook restrictions, to restrict the precoder recommendations being fed back from a remote transceiver, so that precoder selections made by the remote receiver are restricted to permitted subsets of overall precoders within a defined set of overall precoders, or to permitted subsets within larger sets of conversion precoders and tuning precoders, for the case where the overall precoders are represented in factorized form by conversion and tuning precoders. As a non-limiting example, these teachings advantageously provide for precoder restrictions in LTE or LTE-Advanced networks, where ongoing development targets the use of larger, richer sets of precoders, and where the disclosed mechanisms for determining, signaling, and responding to subset restrictions provide significant operational advantages. | 10-13-2011 |
20110268058 | SYSTEM AND METHOD FOR ALLOCATING TRANSMISSION RESOURCES - A method for wirelessly transmitting data using a plurality of transmission layers includes estimating a number of vector symbols to be allocated to transmission of user data codewords during a subframe and determining a number of bits in a plurality of user data codewords to be transmitted during the subframe. The method also includes calculating a number of control vector symbols to allocate to control information based at least in part on the estimated number of vector symbols and the determined number of bits. Additionally, the method includes mapping control codewords to the calculated number of control vector symbols and transmitting vector symbols carrying the user data codewords and the control codewords over the plurality of transmission layers during the subframe. | 11-03-2011 |
20110268061 | SYSTEM AND METHOD FOR ALLOCATING TRANSMISSION RESOURCES - A method for wirelessly transmitting data and control information using a plurality of transmission layers includes determining a number of bits in one or more user data codewords to be transmitted during a subframe and calculating a number of control vector symbols to allocate to control information during the subframe. The number of control vector symbols is calculated based at least in part on the number of bits in the one or more user data codewords to be transmitted during the subframe and an estimate of the number of vector symbols onto which the one or more user data codewords will be mapped. The estimate of the number of vector symbols depends, at least in part, on the number of control vector symbols to be allocated to control information. The method also includes mapping one or more control codewords to the calculated number of control vector symbols and transmitting vector symbols carrying the one or more user data codewords and the one or more control codewords over the plurality of transmission layers during the subframe. | 11-03-2011 |
20110268063 | SYSTEM AND METHOD FOR ALLOCATING TRANSMISSION RESOURCES BASED ON A TRANSMISSION RANK - A method for wirelessly transmitting data using a plurality of transmission layers includes estimating a number of data vector symbols to be allocated to one or more user data codewords during the subframe and determining a number of bits in the one or more user data codewords. The method also includes calculating a nominal number of control vector symbols to allocate to control information based, at least in part, on the estimated number of data vector symbols and the determined number of bits in the one or more user data codewords. Additionally, the method includes determining an offset value based, at least in part, on a number of layers over which the wireless terminal will be transmitting during the subframe and calculating a final number of control vector symbols by multiplying the nominal number of control vector symbols and the offset value. The method also includes mapping one or more control codewords to the final number of control vector symbols and transmitting vector symbols carrying the one or more user data codewords and the one or more control codewords over the plurality of transmission layers during the subframe. | 11-03-2011 |
20110274123 | SYSTEM AND METHOD FOR ALLOCATING TRANSMISSION RESOURCES - A method for wirelessly transmitting user data and at least a first type of control information using a plurality of transmission layers including encoding bits of a first type of control information to form one or more control codewords and encoding bits of user data to form one or more user data codewords. The method also includes generating a plurality of vector symbols based on the control codewords and the user data codewords. Each vector symbol includes a plurality of modulation symbols that are each associated with a transmission layer over which the associated modulation symbol will be transmitted. Generating the plurality of vector symbols includes interleaving bits of the one or more control codewords and bits of the one or more user data codewords so that the first type of control information is carried in modulation symbols associated with the same transmission layers in all the vector symbols transmitted during the subframe that carry the first type of control information. The method also includes transmitting the plurality of vector symbols to a receiver over a plurality of transmission layers. | 11-10-2011 |
20110280296 | CHANNEL QUALITY ESTIMATION FROM RAW BIT ERROR RATE - Channel quality metrics (such as SINR, BLER, and the like) are derived from a raw bit error rate (RBER), defined as the error rate of raw bits output by a demodulator. These initial raw bits are decoded and error-checked (or error-corrected). The error-free decoded bits are re-encoded, and the regenerated raw bits are compared to the initial raw bits to determine the RBER. The RBER is then converted to SINR, BLER, or other channel quality metric. The RBER-based metrics are derived from a data channel rather than reference signals, and hence more accurately reflect deviations from nominal transmission power level, and include receiver demodulator impairments. | 11-17-2011 |
20110292903 | Mapping User Data onto a Time-Frequency Resource Grid in a Coordinated Multi-Point Wireless Communication Sytem - Methods and apparatus are disclosed for receiving user data in a wireless communication system ( | 12-01-2011 |
20110310832 | SYSTEM AND METHOD FOR ALLOCATING TRANSMISSION RESOURCES - A method for wirelessly transmitting data and control information using a plurality of transmission layers includes determining a number of bits in one or more user data codewords to be transmitted during a subframe and calculating, for each of M control signals to be transmitted during the subframe, a value (Q′), based at least in part, on the number of bits in the one or more user data codewords, and an estimated number of user data vector symbols onto which the one or more user data codewords will be mapped. The estimate of the number of user data vector symbols for a particular one of the M control signals depends, at least in part, on a number of control vector symbols to be allocated to one or more others of the M control signals. The method also includes determining a number of control vector symbols onto which to map each of the M control signals based on a respective value Q′ calculated for that control signal, mapping the control signals for that control signal, and transmitting the control vector symbols. | 12-22-2011 |
20110311005 | Correction Of Frequency Offsets Greater Than The Nyquist Frequency - There is disclosed a method of estimating frequency offset of a received signal in a terminal apparatus operating in a wireless communication system. The method comprises a) determining a phase change between a first and a second reference symbol of the received signal, wherein the time distance t between the first and the second reference symbols is associated with an observation frequency f such that f=1/t; b) determining a preliminary frequency offset Δf based on the determined phase change, wherein the preliminary frequency offset Δf form a frequency offset hypothesis Δf | 12-22-2011 |
20110317596 | OPTIMIZED SIGNALING OF DEMODULATION REFERENCE SIGNAL PATTERNS - Orthogonality in cyclic shift (CS) and orthogonal cover code (OCC) selection for DMRS in MIMO is improved by new n | 12-29-2011 |
20120028628 | Switching between Open and Closed Loop Multi-Stream Transmission - The present invention relates to a method and apparatus for multi-stream wireless communication between a transmitter node and a receiver node. The method comprises applying an open-loop multi-stream transmission technique during an initial part of a transmission burst. In another step of the method, detailed channel state information is received ( | 02-02-2012 |
20120069889 | INTERFERER PARAMETER ESTIMATION METHOD AND APPARATUS - Interference is estimated in an Orthogonal Frequency Division Multiplexing system by receiving at a wireless receiver pilot symbols and data symbols transmitted in time and frequency via resource blocks, detecting a first one of the data symbols transmitted to the wireless receiver via a time-frequency resource element of a first one of the resource blocks and identifying a second one of the resource blocks adjacent the first resource block having related interference parameters. The interference is estimated based on the pilot symbols transmitted via the first resource block and the pilot symbols transmitted via the second resource block. | 03-22-2012 |
20120092989 | Controlling CSI Reporting In A LTE Cellular Communication Network - The object of the present invention is to distribute the transmission of the CSI (Channel state information) reports among the different UEs, wherein the CSI reports are based on measurements on cell specific reference signals from the base station. This is achieved in a LTE cellular communication network by controlling the transmission of CSI reports from the UEs. | 04-19-2012 |
20120106471 | Methods and Arrangements for Dynamically Triggering the Transmission of Sounding Reference Signal in a Telecommunication System - The present invention relates to methods and arrangements for providing a more flexible configuration of SRS transmission. This is achieved by dynamically triggering a mobile terminal to transmit SRS. Thus, embodiments of the invention allow dynamically trigged SRS in any uplink subframe, even without necessarily reserving resources semi-statically on cell level. This is done by signaling to the terminal whether the mobile terminal should leave the predefined uplink symbol empty for sounding reference signals or use it for data transmission. In case a terminal leaves the last symbol empty for sounding reference signals, there are two possibilities, either the UE shall transmit one or several reference signals from one or several antennas, or the terminal shall leave the last symbol blank since another terminal may be using the resource for sounding. Accordingly, in a specific embodiment, there are at least three different messages that can be conveyed to the terminal: use the predefined uplink symbol for data, leave it blank or use it for sounding reference signals. | 05-03-2012 |
20120165029 | Method and Arrangement in a Telecommunication System - A method and an arrangement ( | 06-28-2012 |
20120195393 | SUPPORT FOR RETRANSMITTING A TRANSPORT BLOCK WITH A DIFFERENT NUMBER OF LAYERS THAN A PREVIOUS TRANSMISSION ATTEMPT - A method of conveying transport block size (TBS) information includes determining TBS parameters for a wireless transmission of data between a first node and a second node based on a first number of transmission layers associated with the wireless transmission. The method also includes generating a control message indicating the TBS parameters and transmitting the control message to the second node. The method also includes transmitting a transport block to the second node in accordance with the TBS parameters indicated by the control message. The transport block is transmitted over a first number of transmission layers. The method also includes retransmitting the transport block to the second node in accordance with the TBS parameters indicated by the control message. The transport block is retransmitted over a second number of transmission layers that differs from the first number of transmission layers. | 08-02-2012 |
20120201163 | Efficient Use of Reference Signal Symbol Resources in a Hierarchical Heterogeneous Cell Deployment - Techniques for collecting channel-state-information, CSI, feedback in a wireless network that comprises a plurality of geographically separated transmission points ( | 08-09-2012 |
20120201164 | Distribution Of Cell-Common Downlink Signals In A Hierarchical Heterogeneous Cell Deployment - A high-power point ( | 08-09-2012 |
20120257584 | Methods and Arrangements in a Telecommunication System - The present invention relates to methods and apparatus for providing a more flexible configuration of sounding reference signal, SRS, transmission. This is achieved by dynamically triggering a mobile terminal to transmit SRS. Thus, embodiments of the invention include a method implemented by a base station in a communications network that semi-statically configures some uplink symbols for periodic SRS transmission and other uplink symbols for aperiodic SRS transmission. The method includes dynamically determining whether an uplink symbol that has been semi-statically configured for aperiodic SRS transmission is to be used by a given mobile terminal at a given time for SRS transmission. The method then further includes signaling a terminal-specific instruction that indicates said determination to the given mobile terminal. | 10-11-2012 |
20120270594 | Synchronization of PICO-Nodes in a Heterogeneous Cellular Network Deployment - A high-power point ( | 10-25-2012 |
20120294254 | SRS Transmission in PUSCH - The present invention uses user-specific resources, as allocated on the uplink, for conveying one or more antenna-specific sounding reference signals (SRSs). This technique advantageously permits, for example, a user equipment (UE) configured for uplink Multiple-Input-Multiple-Output (MIMO) operation to send antenna-specific SRSs within the granted resources allocated to the UE via one or more scheduled uplink grants. That is, within the granted resources allocated by a given uplink grant, a UE uses at least a portion of those resources for sending antenna-specific SRSs, rather than for sending uplink data (user traffic). Thus, in one or more embodiments, the present invention comprises a method at a UE of transmitting antenna-specific SRSs for two or more uplink transmit antennas. The method comprises transmitting an antenna-specific sounding reference signal for at least one of the uplink transmit antennas within a granted resource allocated to the user equipment for a scheduled uplink data transmission. | 11-22-2012 |
20120309405 | INDEPENDENT CONFIGURATION IDENTITIES IN A HETEROGENEOUS CELLULAR COMMUNICATION NETWORK - Systems and methods are disclosed for using multiple configuration groups having corresponding configuration identity (CID) parameters to configure a transmission channel and a reception channel for a user equipment device in a cellular communication network. In one embodiment, a user equipment device in a cellular communication network obtains CID values for CID parameters for a number of configuration groups. Each of the configuration groups includes one or more transmission channel or reception channel parameters. For each of the configuration groups, the user equipment device configures the parameters in the configuration group based on the CID value obtained for the CID parameter for the configuration group. In this manner, the transmission channel and the reception channel for the user equipment device are configured based on multiple CID values rather than a single physical layer cell identifier for a cell in which the user equipment device is located. | 12-06-2012 |
20130010587 | Methods and Arrangements in a Telecommunication System - The present invention relates to a method and arrangement for controlling re-transmission in a user equipment supporting uplink spatial multiplexing. The method comprises the steps of
| 01-10-2013 |
20130028109 | Point-Dependent Resource Symbol Configuration in a Wireless Cell - A high-power point and one or more low-power points transmit signals associated with the same cell-identifier in a heterogeneous cell deployment. Coverage areas corresponding to the low-power points fall at least partly within the coverage area for the high-power point, so that mobile stations within range of a low-power point are also within range of the high-power point. Channel-state-information reference symbols, CSI-RS, are transmitted using different CSI-RS resources on different transmission points within the cell, while configuration of CSI-RS measurement resources is conducted on a UE-specific basis. The choice of measurement resources to be used is determined by the network, based on the properties of the channels from the transmission points to the UE. As the UE moves around within the cell, the network tracks the channel properties and reconfigures the CSI-RS resources measured by the UE, to correspond to the resource of the closest transmission point or points. | 01-31-2013 |
20130028343 | Method and Arrangement for Adapting a Multi-Antenna Transmission - A method in a first node for adapting a multi-antenna transmission to a second node over a wireless channel is provided. The wireless channel has at least three inputs and at least one output. The first node and the second node are comprised in a wireless communication system. The method includes obtaining at least one symbol stream, determining a precoding matrix having a product structure created by a block diagonal matrix being multiplied from the left with a block diagonalizing unitary matrix, precoding the at least one symbol stream with the determined precoding matrix, and transmitting the precoded at least one symbol stream over a wireless channel to the second node. | 01-31-2013 |
20130040675 | CLOSED LOOP POWER CONTROL IN A HETEROGENEOUS NETWORK BY SELECTING AMONG SETS OF ACCUMULATIVE POWER STEP VALUES - A method is provided in a wireless device for controlling output transmission power from the wireless device. A set is selected among a plurality of sets of power step values, which reside in a memory of the wireless device, responsive to criteria defined in the wireless device. A power control command is received from a radio network node. One of the power step values of the selected set is selected responsive to the power control command. The output transmission power from the wireless device is controlled responsive to the selected power step value. Related methods in radio network nodes and apparatuses are disclosed. | 02-14-2013 |
20130064122 | LINK QUALITY ESTIMATION AND APPARATUS IN A TELECOMMUNICATION SYSTEM - Method and apparatus for enabling accurate link quality estimation of a wireless link between a sending node and a receiving node. When the sending node receives link state reports from the receiving node, it estimates the current state of the wireless link. The sending node also determines a measurement adjusting parameter if the link state reports are deemed inaccurate in relation to the estimated link state, based on a deviation between the received link state reports and the estimated actual link state. The sending node then sends the determined measurement adjusting parameter to the receiving node, and the receiving node provides a link state report based on signal measurements adjusted by the measurement adjusting parameter. The adjusted link state report can then be used for link adaptation of the wireless link and/or for packet scheduling decisions. | 03-14-2013 |
20130201840 | METHODS AND ARRANGEMENTS FOR CHANNEL ESTIMATION - Some embodiments provide a method for channel estimation in a wireless device. According to the method, the wireless device obtains an indication that a set of antenna ports, or antenna port types, share at least one channel property. The wireless device then estimates one or more of the shared channel properties based at least on a first reference signal received from a first antenna port included in the set, or having a type corresponding to one of the types in the set. Furthermore, the wireless device performs channel estimation based on a second reference signal received from a second antenna port included in the set, or having a type corresponding to one of the types in the set, wherein the channel estimation is performed using at least the estimated channel properties. | 08-08-2013 |
20130242949 | Antenna Port Mapping for Demodulation Reference Signals - The present invention provides a unified, rank independent mapping between antenna ports and group/code pairs. Each antenna port is uniquely associated with one code division multiplexing (CDM) group and one orthogonal cover code (OCC). The mapping between antenna ports and group/code pairs is chosen such that, for a given antenna port, the CDM group and OCC will be the same for every transmission rank. | 09-19-2013 |
20130272351 | Parameterized Codebook with Subset Restrictions for Use With Precoding MIMO Transmissions - One aspect of the teachings herein relates to signaling codebook restrictions, to restrict the precoder recommendations being fed back from a remote transceiver, so that precoder selections made by the remote receiver are restricted to permitted subsets of overall precoders within a defined set of overall precoders, or to permitted subsets within larger sets of conversion precoders and tuning precoders, for the case where the overall precoders are represented in factorized form by conversion and tuning precoders. As a non-limiting example, these teachings advantageously provide for precoder restrictions in LTE or LTE-Advanced networks, where ongoing development targets the use of larger, richer sets of precoders, and where the disclosed mechanisms for determining, signaling, and responding to subset restrictions provide significant operational advantages. | 10-17-2013 |