Abstract: A base station node (28) communicates over a radio interface (32) with a wireless terminal (30). The base station node (28) comprises a controller (60) which, upon basis of channel feedback received from the wireless terminal, is configured to make a precoding codebook bitmap decision (3-3) regarding a precoding codebook bitmap affecting transmissions between the base station (28) and the wireless terminal (30). The base station (28) is further configured to communicate the precoding codebook bitmap decision so that the precoding codebook bitmap decision may be implemented by the wireless terminal (30). In example embodiments and modes the base station (28) sends the precoding codebook bitmap decision using a bitmap decision signal to a radio network controller (26).

Abstract: The present disclosure relates to radio communication and, more particularly, to beam-forming in a combined radio cell deployment. In one example embodiment, the disclosure presents a method performed by a network node operating in a combined radio cell, wherein the method comprises creating a probing pilot (e.g., a F-CPICH) which is multiplied with a beam-forming vector weight; and transmitting a first radio signal to a UE, the first radio signal comprising the created probing pilot multiplied with the beam-forming vector weight.

Abstract: There is provided a method, performed by a receiving node, for generating composite acknowledgement information for a Hybrid Automatic Repeat Request, HARQ, process. The composite acknowledgement information is generated in response to transport blocks received from a transmitting node. The method comprises the step (301) of providing, for each transport block, a positive acknowledgement/negative acknowledgement, ACK/NAK, indication for each of a plurality of transmissions of the transport block to define a respective set of ACK/NAK indications. The method also comprises the step (302) of generating the composite acknowledgement information based on the respective sets of ACK/NAK indications for the transport blocks over the plurality of transmissions. In this way, by considering respective sets of ACK/NACK indications over a plurality of transmissions, it is possible to generate an appropriate composite acknowledgment.

Abstract: There is disclosed a method performed by a User Equipment, UE, for Hybrid Automatic Repeat Request, HARQ, retransmission of data in a multi-antenna wireless communication system. The method comprises, receiving Acknowledgement/Negative Acknowledgement, ACK/NACK, feedback information relating to data transmitted on two streams, and performing, upon rank reduction where only one stream is available for transmission, retransmission of data on a cancelled stream over the remaining stream. There is furthermore disclosed a UE configured for performing the method. A transmission method together with an arrangement for a UE is also disclosed.

Abstract: The exemplary embodiments herein relate to a controller node and a method in a controller node for selecting a network node in an heterogeneous network comprising a plurality of network nodes. The method comprises, receiving CQI values from a UE and based on those values selecting a network node for serving a UE.

Abstract: Method and receiver jointly detect and decode a part of an encoded, spread and modulated signal received on a channel in a wireless communication network and corrupted by channel multipath. Differences between the received signal and noiseless theoretical signals corresponding to each of the possible values of the part are calculated using hypothetical transmission matrices. The smallest difference corresponds to the actual value of the part.

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.

Abstract: There is disclosed a method performed by a User Equipment, UE, for Hybrid Automatic Repeat Request, HARQ, retransmission of data in a multi-antenna wireless communication system. The method comprises, receiving Acknowledgement/Negative Acknowledgement, ACK/NACK, feedback information relating to data transmitted on two streams, and performing, upon rank reduction where only one stream is available for transmission, retransmission of data on a cancelled stream over the remaining stream. There is furthermore disclosed a UE configured for performing the method. A transmission method together with an arrangement for a UE is also disclosed.

Abstract: A base station, comprising a first antenna for transmitting a first pilot signal; a second antenna for transmitting a second a pilot signal; a third antenna for transmitting a third pilot signal; and a fourth antenna for transmitting a fourth pilot signal. The base station is configured to transmit pilot signal power information for indicating power values to a user equipment, UE, receiving the pilot signal power information. The pilot signal power information comprises: a first power value corresponding to the first pilot signal, a second power value corresponding to the second pilot signal, a third power value corresponding to the third pilot signal, and a fourth power value providing information regarding at least two demodulation pilot signals.

Abstract: A radio network node identifies a codebook subset restriction to be applied to a user equipment (UE) employing carrier aggregation and multiple-input-multiple-output (MIMO), identifies a correspondence between the codebook subset restriction and multiple carriers in a carrier group of the UE, and transmits correspondence information indicating the correspondence between the codebook subset restriction and the multiple carriers in the carrier group. The UE receives the correspondence information and transmits channel state information for the multiple carriers according to the codebook subset restriction.

Abstract: A method and a radio network node for assisting in a handover of a user equipment from a first cell to a second cell as well as a method and a user equipment for handling the handover are disclosed. The radio network node sends an indication to the user equipment, wherein the indication indicates whether or not to use a same first codebook subset restriction bitmap in the second cell as in the first cell. Moreover, the user equipment receives the indication from the radio network node.

Abstract: A radio network node identifies a codebook subset restriction to be applied to a user equipment (UE) employing carrier aggregation and multiple-input-multiple-output (MIMO), identifies a correspondence between the codebook subset restriction and multiple carriers in a carrier group of the UE, and transmits correspondence information indicating the correspondence between the codebook subset restriction and the multiple carriers in the carrier group. The UE receives the correspondence information and transmits channel state information for the multiple carriers according to the codebook subset restriction.

Abstract: A base station, comprising a first antenna for transmitting a first pilot signal; a second antenna for transmitting a second a pilot signal; a third antenna for transmitting a third pilot signal; and a fourth antenna for transmitting a fourth pilot signal. The base station is configured to transmit pilot signal power information for indicating power values to a user equipment, UE, receiving the pilot signal power information. The pilot signal power information comprises: a first power value corresponding to the first pilot signal, a second power value corresponding to the second pilot signal, a third power value corresponding to the third pilot signal, and a fourth power value providing information regarding at least two demodulation pilot signals.

Abstract: A wireless terminal may receive downlink signaling over a downlink signaling channel from a base station, with the downlink signaling including a DTX indicator for a first downlink MIMO layer and a retransmission data indicator for a second downlink MIMO layer. Soft bits for the second MIMO layer may be generated for a TTI corresponding to the downlink signaling, and the soft bits may be decoded. After decoding the soft bits, an ACK message for the second MIMO layer may be transmitted responsive to success decoding the soft bits or a NACK message for the second MIMO layer may be transmitted responsive to failure decoding the soft bits, and a default response may be transmitted for the first MIMO layer for the TTI.

Abstract: There is provided a method performed by a User Equipment, UE, for encoding Hybrid Automatic Repeat Request, HARQ, Acknowledgements, ACK/NACK, in a multi-antenna wireless communications system. The method comprises the step (S1) of bundling, also referred to as co-representing, a HARQ-ACK/NACK to be sent in response for a transport block of information with a HARQ-ACK/NACK to be sent in response for another transport block of information, when more than two transport blocks of information are used. The method also comprises the step (S2) of encoding the bundled HARQ-ACK/NACK information.

Abstract: Example embodiments presented herein are directed towards a Radio Network Controller (RNC) (400) and a radio network node (101, 201), for example a eNodeB and/or a wireless terminal, and corresponding methods therein, for establishing a radio link without a DPCH/F-DPCH. The establishment of such a radio link may be provided by the RNC sending an indication to the radio network node. The indication may be in the form of a message type, a cause code, instructions or an IE comprising an absence of a DPCH/F-DPCH configuration. The communication message may comprise an indication to establish the radio link with only an E-HICH or both a E-HICH and a E-RGCH.

Abstract: A method of operating a terminal in a radio access network may include receiving a transmission of first and second data blocks over respective first and second multiple-input-multiple-output (MIMO) layers during a transmission time interval (TTI). Respective first and second demodulated codewords may be generated corresponding to the transmission of the first and second data blocks, and the first and second demodulated codewords may be decoded. Responsive to failure decoding the first demodulated codeword and success decoding the second demodulated codeword, a negative acknowledgement may be transmitted indicating failure receiving the first and second data blocks. Related terminals are also discussed.

Abstract: The exemplary embodiments herein relate to a controller node and a method in a controller node for selecting a network node in an heterogeneous network comprising a plurality of network nodes. The method comprises, receiving CQI values from a UE and based on those values select a network node for serving a UE.

Abstract: A method of operating a node of a radio access network may include transmitting first and second data blocks from the radio access network over respective first and second MIMO layers of a MIMO wireless channel to a wireless terminal during a first TTI. Responsive to receiving a NACK message for the second data block, downlink signaling for a second TTI may be transmitted from the radio access network to the wireless terminal with the downlink signaling including a DTX indicator for the first MIMO layer and a retransmission data indicator for the second MIMO layer. Responsive to receiving the NACK message for the second data block, the second data block may be retransmitted from the radio access network over the second MIMO layer to the wireless terminal during a second TTI.

Abstract: A method and a controlling node (700) of a cellular network, to control radio communication over a radio link used by a User Equipment, UE, to communicate radio signals with multiple radio nodes (702) serving a combined cell. The controlling node (700) receives from the UE a Channel Quality Indicator, CQI, that has been determined by the UE based on a common pilot signal transmitted by the multiple radio nodes. When it is detected that the received CQI has been determined by the UE during a time interval when one or more node-specific pilot signals were also transmitted individually by one or more of the multiple radio nodes in the combined cell, the controlling node (700) changes the received CQI to compensate for interference caused by the one or more node-specific pilot signals on the common pilot signal when received by the UE. The changed CQI is then used for evaluating the radio link.