摘要:
A method and apparatus are provided to provide for timely switching between antenna port configurations as the mode of operation of a mobile terminal changes which may, in turn, dictate different combinations of the MIMO, CoMP and/or CA capabilities. In this regard, a method is provided that includes utilizing one or more antennas in a first antenna port configuration in a first mode of operation. The method may also receive a command that triggers switching to another antenna port configuration and then determines another one of a plurality of antenna port configurations to be utilized in response to the command. The method may then utilize one or more antennas of the another one of the antenna port configurations in a second mode of operation. A corresponding apparatus and computer program product are also provided.
摘要:
A method is provided for facilitating device-to-device communication. The method may include causing a message to be sent to a first device to trigger the first device to transmit a reference signal to transmit a reference signal. The method may further include causing a request for a channel quality indication to be sent to a second device. The request may indicate that the channel quality indication is to be based on measurement of the reference signal. The method may additionally include receiving the channel quality indication in response to the request. The channel quality indication being indicative of a link quality between the first device and the second device. The method made also include determining based on the received channel quality indication whether to cause establishment of a device-to-device link between the first device. A corresponding apparatus and computer program product are also provided.
摘要:
Provided are methods, apparatuses and computer program products for configuring an uplink and downlink splitting pattern for the D2D communication under the cellular network. A method comprises receiving, from a base station, mask information regarding which subframes in a frame for cellular communication may be used for device-to-device communication; and configuring, based upon the mask information, an uplink and downlink splitting pattern for the device-to-device communication, which includes one special downlink subframe, X uplink subframes immediately following the special downlink subframe, and (N−1−X) downlink subframes immediately following the X uplink subframes, wherein integer N is a subframe configuration period, and integer X is the number of uplink subframes included in the subframe configuration period. A further method comprises configuring, by a base station, an uplink and downlink splitting pattern for the device-to-device communication. With the present invention, the number of the uplink and downlink splitting patterns and complexity of its implementation will be decreased efficiently.
摘要:
A network sends data blocks in a first/n1h radio frame having a first configuration of uplink to downlink transmission time intervals TTIs. Each of these data blocks originate a separate hybrid automatic repeat request HARQ process. The network then frequency or spatially mutliplexes first re-transmissions of at least two of the data blocks in at least one TTI of a sequentially next second/(n+1)st radio frame having a different second configuration of uplink to downlink TTIs. If necessary second re-transmissions of the HARQ processes can also be similarly multiplexed in a TTI of a third/(n+2)nd radio frame sequentially next after the second/(n+1)st frame. In the examples, if frequency domain multiplexing the frequency mutliplexed first re-transmissions are separately scheduled; or if spatial domain multiplexing the spatially mutliplexed first re-transmissions are scheduled with a single physical downlink control channel PDCCH.
摘要:
A radio frame or subframe is checked and it is determined to satisfy at least one predefined condition. In response to that determination, a second search space is utilized such that a number Y of blind detections for a user equipment UE in the determined radio frame/subframe is greater than a number X of blind detections for the UE in the radio frame/subframe if a first search space were utilized. In various embodiments the predefined condition is: the number X of blind detections is less than a threshold value Z (Z>=Y) where Z is a maximum number M of blind detections defined by a transmission mode for the frame's/subframe's component carrier CC; a number of CCs configured for the UE; the radio frame or subframe is in the first CC but not in the second CC one of uplink or a special subframe (further conditions) or an almost blank subframe.
摘要:
A user's downlink component carriers DL-CCs are divided into groups. An aperiodic CQI/PMI report is triggered by signaling (for example one bit). There is a pattern that maps the signaled trigger to a particular DL-CC within a group of DL-CCs that are configured for a user equipment UE, and that mapped particular DL-CC is determined to be the subject of the aperiodic report. In various embodiments the pattern is implicit and points to the DL-CC for which an aperiodic report has not been sent for more than a threshold time interval; or to the DL-CC for which resources have not been allocated for a periodic report; or to every DL-CC in the group that are activated for the user equipment. Examples are detailed for apparatus, method and computer program from the perspective of the network and from the perspective of the UE.
摘要:
A user's downlink component carriers DL-CCs are divided into groups. An aperiodic CQI/PMI report is triggered by signaling (for example one bit). There is a pattern that maps the signaled trigger to a particular DL-CC within a group of DL-CCs that are configured for a user equipment UE, and that mapped particular DL-CC is determined to be the subject of the aperiodic report. In various embodiments the pattern is implicit and points to the DL-CC for which an aperiodic report has not been sent for more than a threshold time interval; or to the DL-CC for which resources have not been allocated for a periodic report; or to every DL-CC in the group that are activated for the user equipment. Examples are detailed for apparatus, method and computer program from the perspective of the network and from the perspective of the UE.
摘要:
A radio frame or subframe is checked and it is determined to satisfy at least one predefined condition. In response to that determination, a second search space is utilized such that a number Y of blind detections for a user equipment UE in the determined radio frame/subframe is greater than a number X of blind detections for the UE in the radio frame/subframe if a first search space were utilized. In various embodiments the predefined condition is: the number X of blind detections is less than a threshold value Z (Z>=Y) where Z is a maximum number M of blind detections defined by a transmission mode for the frame's/subframe's component carrier CC; a number of CCs configured for the UE; the radio frame or subframe is in the first CC but not in the second CC one of uplink or a special subframe (further conditions) or an almost blank subframe.
摘要:
Systems and methods for providing an efficient mechanism for transmitting encoded downlink assignment index (DAI) and for signaling the ACK/NAK information corresponding to downlink grant allocations in an over the air radio telecommunications network with time division duplex (TDD) capability, where aggregation of component carriers (CCs) is used. Downlink control messages containing encoded DAI information are transmitted with downlink allocation grants. A receiver observes the encoded DAI and the downlink allocation grants and forms corresponding ACK/NAK signals. Method embodiments for forming the ACK/NAK signals for CC groups and frames or subframes are provided. The ACK/NAK signals are then encoded using method embodiments and transmitted over parallel channels for each CC group to the transmitter. By using method embodiments for selecting resources for use in the transmission, the last observed DL grant can be identified by the transmitter and the transmitter can detect an error at the receiver.
摘要:
Systems and methods for providing an efficient mechanism for transmitting encoded downlink assignment index (DAI) and for signaling the ACK/NAK information corresponding to downlink grant allocations in an over the air radio telecommunications network with time division duplex (TDD) capability, where aggregation of component carriers (CCs) is used. Downlink control messages containing encoded DAI information are transmitted with downlink allocation grants. A receiver observes the encoded DAI and the downlink allocation grants and forms corresponding ACK/NAK signals. Method embodiments for forming the ACK/NAK signals for CC groups and frames or subframes are provided. The ACK/NAK signals are then encoded using method embodiments and transmitted over parallel channels for each CC group to the transmitter. By using method embodiments for selecting resources for use in the transmission, the last observed DL grant can be identified by the transmitter and the transmitter can detect an error at the receiver.