Abstract: The present invention discloses a method in a wireless access network node for controlling a UE. The UE comprises at least two transmit antennas, and is capable of uplink transmit diversity. There is an antenna weight associated with each transmit antenna. First, the wireless access network node determines that the antenna weights of the user equipment may be controlled. Then, it creates a control signal that comprises control information and transmits it to the user equipment. The control information controls a UE autonomous selection of the antenna weights in the UE.

Abstract: Data may be transmitted from a RAN node to a wireless terminal using a MIMO antenna array. A plurality of unmapped symbol blocks may be generated. Symbols of a first one of the plurality of unmapped symbol blocks may be mapped to first and second mapped symbol blocks so that the first mapped symbol block includes symbols of the first unmapped symbol block and so that the second mapped symbol block includes symbols of the first unmapped symbol block. The symbols of the first and second mapped symbol blocks may be precoded to provide precoded symbols of respective first and second MIMO precoding layers using a MIMO precoding vector. Each of the precoded symbols of the first and second MIMO precoding layers may be transmitted through the MIMO antenna array to the wireless terminal using a same TFRE. Related devices and terminals are also discussed.

Abstract: A method of communicating with a wireless terminal may include providing first information responsive to receiving first and second multiple-input-multiple-output (MIMO) data streams from the wireless terminal through a first antenna array of a first sector during a first transmission time interval. Second information may be provided responsive to receiving the first and second MIMO data streams from the wireless terminal through a second antenna array of a second sector during the first transmission time interval with the first and second sectors being different and the first and second antenna arrays being different. An offset value may be generated responsive to the first information and/or the second information, with the offset value defining a difference between the first and second MIMO data streams for a second transmission time interval, and the offset value may be transmitted to the wireless terminal.

Abstract: A radio network node (28) comprises a transmitter/receiver (48, 82, 93) configured to communicate over an air interface (32) with a wireless terminal (30); a scheduler (46, 84); and a order signal determination means (46, 62, 84). The scheduler (46, 84) schedules pilot signals, including common pilot signals transmitted for channel estimation, for transmission over the air interface to the wireless terminal. The order signal determination means (46, 62, 84) is configured to make a selective determination whether additional pilot signals for data demodulation are also to be transmitted to the wireless terminal (30) in addition to the common pilot signals transmitted for the channel estimation. The wireless terminal (30) comprises a transmitter and receiver (50, 101, 112) and pilot selection means (68). The pilot selection means (68) is configured to make a determination regarding which pilot signals transmitted by the radio network node are to be utilized by the wireless terminal.

Abstract: A method that is implemented by a base station to decode a high speed dedicated physical control channel (HS-DPCCH) using a preamble and postamble of a hybrid automatic repeat request (HARQ) message while maintaining a fixed false alarm probability of interpreting a discontinuous transmission (DTX) as a HARQ acknowledgement (ACK) or HARQ negative acknowledgement (NACK). The method includes a set of steps, including receiving a signal from a user equipment (UE). The signal is despread using a G-RAKE demodulator. The despread signal is combined to produce a combined symbol estimate vector x including a preamble and postamble of the HARQ message. The combined symbol estimate vector x is checked to determine whether the signal includes a DTX, HARQ ACK or HARQ NACK, and then the DTX, HARQ ACK or HARQ NACK is output.

Abstract: At least one transport data block is transmitted from a first sector of a network over a downlink to a wireless terminal during a time resource element for a multi-flow downlink transmission to the wireless terminal, and at least one transport data block is transmitted from a second sector of the network over a downlink to the wireless terminal during the time resource element for the multi-flow downlink transmission. A feedback message is received for the time resource element from the wireless terminal, wherein the feedback message includes a HARQ-ACK codeword selected from a HARQ-ACK codebook providing HARQ-ACK feedback for the at least one transport data block transmitted from the first sector and for the at least one transport data block transmitted from the second sector. The HARQ-ACK codeword is interpreted for the at least one transport data block transmitted from the first sector based on the first sector being a primary sector for the multi-flow downlink transmission.

Abstract: The present solution provides a method in a base station (110) for selecting one or more user equipments (120) to be scheduled for a transmission. After receiving (201) channel state information from the respective one or more user equipments (120), the base station (110) estimates (202) the throughput of the transmission of the respective one or more user equipments (120). The throughput is based on the received channel state information. The base station (110) further estimates (203) the consumption of throughput that is expected for transmitting scheduling information to each of the respective one or more user equipments (120). The base station then selects (204) the respective one or more user equipments (120) to be scheduled for transmission based on a criterion. The criterion is based on the estimated throughput and the estimated consumption of throughput that is expected for transmitting the scheduling information to the respective one or more user equipments (120).

Abstract: The present invention relates to a method and a user equipment for use in a wireless communication system that allow for improved uplink transmit diversity performance by using downlink measurements for making informed decisions on whether or not to change precoding vector for uplink transmission. The user equipment measures (32) downlink characteristics, such as received power, on a plurality of antennas of the user equipment. Based on the measured downlink characteristics a precoding vector for unlink transmission is determined (38). The determined precoding vector is then used to perform uplink transmission (31).

Abstract: The present invention relates to a method and a device for decoding precoded signals in a wireless communication system and network node or terminal associated therewith. The wireless communication system comprises a sender and a receiver that share a codebook containing a plurality of precoding matrices. The sender precodes at least a data signal to be transmitted with one of the plurality of precoding matrices. Said method comprising receiving signals from the sender, estimating a channel between the sender and the receiver based on a part of received signals that is known a priori, evaluating relevancies of precoding matrices in said codebook to a precoded signal in the received signals based on at least the estimated channel and the codebook according to a predetermined criterion, and selecting a precoding matrix with maximum relevancy by comparing the evaluated relevancies, and applying the selected precoding matrix for decoding the received precoded signal.

Abstract: A method in a network node for enhancing a channel estimate based on a Dedicated Physical Control Channel, DPCCH, between a user node and the network node is provided. The DPCCH has a first power. The network node receives (501) the DPCCH. The first power of the DPCCH is boosted with additional power, resulting in a second power. The network node then obtains (502) a channel estimate based on the DPCCH comprising the second power. As soon as said channel estimate is obtained, the network node removes (503) the additional power from the DPCCH based channel estimate.

Abstract: The invention relates to a method 10 in a base station 2 of a communication system 1 comprising one or more user equipment 4. The method 10 comprises the steps of: detecting 11 that no control transmission or data transmission is being prepared for the one or more user equipment 4; and transmitting 12 a downlink inactivity indicator to the one or more user equipment 4. The invention also encompasses methods in a user equipment, computer programs, and computer program products.

Abstract: Data may be transmitted from a RAN node to a wireless terminal using a MIMO antenna array. A plurality of unmapped symbol blocks may be generated. Symbols of a first one of the plurality of unmapped symbol blocks may be mapped to first and second mapped symbol blocks so that the first mapped symbol block includes symbols of the first unmapped symbol block and so that the second mapped symbol block includes symbols of the first unmapped symbol block. The symbols of the first and second mapped symbol blocks may be precoded to provide precoded symbols of respective first and second MIMO precoding layers using a MIMO precoding vector. Each of the precoded symbols of the first and second MIMO precoding layers may be transmitted through the MIMO antenna array to the wireless terminal using a same TFRE.

Abstract: Embodiments herein relate to a method in a base station (12) for providing feedback to a user equipment (14) for transmissions of a secondary stream out of a primary and a secondary stream of the user equipment (14) in an uplink Multiple Input Multiple Output mode. The base station (12) transmits to the user equipment (14), a preferred transmission rank and an offset for the secondary stream in a channel, wherein the offset is to be used by the user equipment (14) when deciding transport block size of the secondary stream and the preferred transmission rank is to be used by the user equipment (14) when deciding a transmission rank.

Abstract: It is presented a method for controlling multiple input multiple output, MIMO, pilot channel boosting. The method is performed in a user equipment, UE, capable of MIMO transmissions using a primary and a secondary stream. The method comprising the steps of: determining a rank used for uplink transmissions from the UE; and determining a boosting parameter affecting power boosting of an Enhanced Dedicated Physical Control Channel, E-DPCCH, and a Secondary Dedicated Physical Control Channel, S-DPCCH, based on the rank. A corresponding UE, base station and associated method are also presented.

Abstract: Method and arrangement for use in a receiving node, for determining whether received data is encoded with a certain channel code candidate. The method involves obtaining baseband data encoded with an unknown channel code and calculating the respective posterior probabilities that a set of syndrome checks are satisfied, given the obtained data, which syndrome checks are associated with the channel code candidate. The method further involves combining the posterior probabilities and determining whether the channel code candidate was used for encoding the obtained data, based on the combined posterior probabilities.

Abstract: The embodiments herein relate to a method in a base station (301) for determining adjustment of common pilot power in a four-way transmit antenna, 4Tx, communications system (300). The base station (301) comprises a first transmit antenna (1201), a second transmit antenna (1202), a third transmit antenna (1203) and a fourth transmit antenna (1204). The base station (301) identifies a set of scheduled user equipments (310) in the communications system (300). The base station (301) determines that the common pilot power should be adjusted based on a criterion associated with the set of scheduled user equipments (310).

Abstract: It is presented a method for controlling uplink multiple-input-multiple-output, MIMO. The method is performed in a network node and comprises the steps of: determining an inter-stream interference between two uplink streams in MIMO, Multiple Inputs Multiple Outputs, transmission; and controlling a selection of E-TFC, Enhanced dedicated transport channel Transport Format Combination, in response to the determined interference.

Abstract: The present invention relates to a method and arrangements in a communications system enabled for transmission of several data streams to or from different receivers (120a-120c, 400) using a shared physical channel. The method comprises the step of masking control channel with different sequences corresponding to a receiver identity with respect to the number of simultaneously scheduled receivers.

Abstract: A UE, for an HSPA WCDMA system, equipped with a first and a second transmit antenna, and arranged to use one or more sets of pre-coding weights for transmission. The UE is arranged to receive instructions from a NodeB on the set or sets of pre-coding weights to be used, and to transmit a first and a second pilot signal, and to use a first set of pre-coding weights for the first pilot signal and a second set of pre-coding weights for the second pilot signal, where the first set of pre-coding weights is the same as the UE uses for transmitting a first data stream, and to use different spreading codes for the first data stream and for the first pilot signal.

Abstract: A NodeB (105) for an HSPA enabled WCDMA network (100), arranged (11, 12, 13) to transmit beam forming instructions to a User Equipment, a UE (1 10), which is arranged for beam forming. The beam forming instructions comprise information identifying a code book with one or more code words, and the NodeB is also arranged to transmit code words from said code book to the UE at a certain rate. The NodeB is further arranged to determine said rate based on dynamically varying information available in the WCDMA network, and to receive said information on the code book from an RNC upon configuration of the U E or to choose code book based on said dynamically varying information available in the WCDMA network.