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: 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: A method performed in a network node, of scheduling resources for downlink transmissions to a user equipment, UE, in a heterogeneous wireless communication network including macro nodes and Low Power Nodes, LPNs, in a combined cell deployment, wherein each macro node shares a cell identity with one or more LPNs. The method comprises configuring two or more pilot signals for probing the UE, wherein each pilot signal is configured to be distinguishable from configured one or more other pilot signals. A resource control, RRC, signal is sent to the UE, the RRC signal including information on the configuration of the two or more pilot signals. The network node controls transmission of the two or more pilot signals, wherein transmission of one pilot signal is originated from the macro node and transmission of one or more further pilot signals is originated from respective one or more LPNs.

Abstract: An arrangement (17) is provided for setting and adjusting at least one parameter in a radio communication network (11), which is used in control of communication in the radio communication network and which is dependent on a round trip time for a signal travelling from a radio network controller (13) to a user equipment (16) and back to the radio network controller. The arrangement comprises a module (17a) for initially estimating a maximum value of the round trip time; a setting module (17b) for initially setting the parameter depending on the initially estimated maximum value of the round trip time; a module (17c) for measuring the round trip time; and a module (17d) for adjusting the parameter depending on the measured round trip time, wherein the measured round trip time is expected to be shorter than the initially estimated maximum value of the round trip time.

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: Systems and methods related to providing spatial reuse gain as well as Multiple-Input-Multiple-Output (MIMO) gains in a combined cell of a heterogeneous cellular communications network are disclosed. In one embodiment, a method of operation of a wireless device includes receiving node-specific pilot signals from transmission nodes in a combined cell, where each node-specific pilot signal is transmitted by a different transmission node in the combined cell. The method further includes generating channel measurements based on the node-specific pilot signals. The channel measurements include a separate channel measurement for each transmission node based on the node-specific pilot signal transmitted by the transmission node. The method further includes selecting a desired combination of nodes from the subset of the transmission nodes based directly or indirectly on the channel measurements and providing an indication of the desired combination of nodes to the central control node for the combined cell.

Abstract: A network node, user equipment, and corresponding methods can support non-contiguous cell configuration of the downlink in at least one frequency band of a telecommunications system. The network node configures cells for non-contiguous downlink operations based on a signal received from a user equipment. The signal comprises information about the user equipment's radio access capability in non-contiguous downlink operation, including: a first indication that indicates the maximum number of cells supported by the user equipment; a second indication that indicates the maximum gap bandwidth between cells supported by the user equipment; and a third indication that indicates whether the user equipment supports an equal number of cells, or a different number of cells, on each side of a gap between the maximum number of cells.

Abstract: A method in a network node (110) for configuring cells for downlink operations in a telecommunications system (100) is provided. The network node (110) is configured to support non-contiguous downlink operations on more than one cell (f1, f2, f3, f4) in at least one frequency band. The network node (110) receives a signal from a user equipment (121) in the telecommunications system (100). The signal comprises information about radio access capability of the user equipment (121). Information about radio access capability of the user equipment (121) comprises a first indication which indicates the maximum number of cells that is supported by the user equipment (121) in the non-contiguous downlink operation. Furthermore, the information about radio access capability of the user equipment (121) comprises a second indication which indicates the maximum gap bandwidth between cells (f1, f2, f3, f4) that is supported by the user equipment (121) in the non-contiguous downlink operation.

Abstract: Disclosed herein, among other things, is a method performed by a user equipment (UE) for providing to a network channel station information (CSI). The method comprises: receiving from the network two measurement power offsets, a first measurement power offset and a second measurement power offset; selecting one of said two measurement power offsets; computing CSI using the selected measurement power offset; and transmitting to the network the determined CSI.

Abstract: A method of transmitting data from a wireless network node over a MIMO channel to a wireless terminal may include transmitting first and second transport data blocks to the wireless terminal over the MIMO channel using a first time-frequency-resource-element (TFRE). Responsive to receiving a NACK message from the wireless terminal corresponding to the first and second transport data blocks transmitted using the first TFRE, the first and second transport data blocks may be retransmitted to the wireless terminal over the MIMO channel using a second TFRE.

Abstract: Improved performance of downlink data transmission in a high speed downlink packet access, HSDPA, mobile communication system is described. Rank information, RI, and channel quality information, CQI, is obtained in a radio base station from a user equipment, UE, and this rank and CQI information is used in a medium access control-ehs, MAC-ehs, entity for determining a transport format and resource combination, TFRC, on a downlink channel.

Abstract: Methods and devices supporting MIMO transmission/reception are discussed. For example, first and second data blocks may be transmitted/received respectively using first and second transmission/reception layers during a first TTI for rank two transmission/reception. A first HARQ process may be mapped to the first data block of the first layer for the first TTI. A second HARQ process may be mapped to the second data block of the second layer for the first TTI. Third, fourth, and fifth data blocks may be transmitted/received respectively using the first and second layers and using a third transmission/reception layer during a second TTI for rank three transmission/reception. The first HARQ process may be mapped to the third data block of the first layer for the second TTI. The second HARQ process may be mapped to the fourth and fifth data blocks of the second and third layers for the second TTI.

Abstract: A method of operating a node of a MIMO network may include transmitting first and second HARQ IDs over a downlink signaling channel to a wireless terminal for a first MIMO TTI. The first HARQ ID is mapped to a first MIMO layer, and the second HARQ ID is mapped to second and third MIMO layers. First, second, and third data blocks are transmitted over the first, second, and third MIMO layers to the wireless terminal for the first MIMO TTI. Responsive to receiving an ACK message associated with the first HARQ ID, a fourth data block is transmitted over the first MIMO layer to the wireless terminal for a second MIMO TTI. Responsive to receiving a NACK message associated with the second HARQ process identification, the second and third data blocks are retransmitted over the second and third MIMO layers to the wireless terminal for the second MIMO TTI.

Abstract: A method of operating a wireless network node may include transmitting a first MIMO downlink communication to a wireless terminal according to a first MIMO rank, and receiving at least one HARQ ACK/NACK, message from the wireless terminal corresponding to the first MIMO downlink communication. A report may be received from the wireless terminal identifying a reported MIMO rank, and a second MIMO rank may be selected for a second MIMO downlink communication responsive to the at least one HARQ ACK/NACK message. The second MIMO downlink communication may be transmitted to the wireless terminal according to the second MIMO rank.

Abstract: A base station (102), comprising a first antenna (111) for transmitting a first pilot signal; a second antenna (112) for transmitting a second a pilot signal; a third antenna (113) for transmitting a third pilot signal; and a fourth antenna (114) 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 (104), 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: Disclosed is a base station (130) configured to control transmission of data streams from the base station to a user equipment, UE, in a wireless communication system. The base station (130) provides transmission of at least three data streams. The base station further provides only two different hybrid automatic retransmission request, HARQ, downlink processes (703ab, 704ab). The base station comprises a mapping unit (702) for mapping Medium Access Control enhanced high speed, MAC-ehs, service data units, SDUs belonging to two different data streams of the at least three data streams to the same of the two different HARQ downlink processes. The MAC-ehs SDUs belonging to two different data streams are of equal size. Disclosed is also a corresponding method performed by a base station (130).

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 of transmitting data from a network node to a wireless terminal may include transmitting first and second data blocks over respective first and second MIMO layers to the wireless terminal during a first MIMO transmission time interval (TTI). Feedback may be received from the wireless terminal for the first MIMO TTI with the feedback including first and second ACK-NACK codewords that map to the respective first and second MIMO layers. Responsive to the network node being transmit buffer limited for the wireless terminal and responsive to the first ACK-NACK codeword being an ACK and the second ACK-NACK codeword being a NACK, a discontinuous transmission indicator for the first MIMO layer may be transmitted to the wireless terminal, and the second data block may be retransmitted over the second MIMO layer to the wireless terminal during a second MIMO TTI after transmitting the discontinuous transmission indicator.

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: A method in a radio receiver arrangement for receiving data blocks of radio signalling. The method comprises receiving a plurality of data blocks over a radio interface from a transmitting side. The method also comprises applying a single hybrid automatic repeat request (HARQ) process to the plurality of data blocks, whereby it is determined that at least one of the plurality of data blocks has been received ok and that at least one of the plurality of data blocks has not been received ok. The method also comprises generating a negative acknowledgement (NAK) for the plurality of data blocks in response to the at least one of the plurality of data blocks having not been received ok. The method also comprises outputting, from the receiver arrangement, at least one symbol obtained from the at least one of the plurality of data blocks which has been received ok.