Abstract:
Methods, apparatuses, and computer program products for defining ARO values in TDD are provided. One method includes defining acknowledgement (Ack)/negative acknowledgement (Nack) resource offset (ARO) values in time division duplex (TDD) with a first set of values and a second set of values. The first set of values contains negative values and is used to offset hybrid automatic repeat request (HARQ) acknowledgment (ACK) resource determination so that HARQ-ACK is transmitted on physical uplink control channel (PUCCH) resources corresponding to another downlink subframe, and the second set of values contains values between −2 and 2.
Abstract:
Various communication systems may benefit from appropriate configuration of when a device is required to be active. For example, enhanced machine type communication radio resource management requirements regarding device activity can be aligned with machine type communication physical downlink control channel monitoring. A method can include determining a discontinuous reception usage state of a user equipment. The method can also include selecting a monitoring performance requirement from a plurality of monitoring performance requirements based on the determined discontinuous reception usage stage. The method can further include power saving in accordance with the selected monitoring performance requirement.
Abstract:
Embodiments of the present disclosure provide methods, devices and a computer readable medium for a restriction on a measurement for a neighbor cell. According to a method implemented by a network device in a communication system, the network device determines a neighbor cell on a frequency layer capable of cell reference signal (CRS) muting. A cell reference signal in the neighbor cell is transmitted on a predetermined physical resource if the neighbor cell enables CRS muting. In response to the determination, the network device transmits measurement restriction information to a terminal device in a cell of the network device. The measurement restriction information indicates that a radio resource management (RRM) measurement for any neighbor cell on the frequency layer is restricted to be performed on the predetermined physical resource. The embodiments of the present disclosure improve a measurement for a neighbor cell.
Abstract:
Embodiments of the present disclosure relate to a method and device for determining carriers to be monitored. In example embodiments, a first number of carriers of a first radio access technology (RAT) to be monitored by a terminal device when operating using a second RAT is determined. The second RAT is different from the first RAT. A first total number of carriers to be monitored by the terminal device when operating using the second RAT is determined at least in part based on the first number. A second number of carriers of the second RAT to be monitored by the terminal device when operating using the first RAT is determined. A second total number of carriers to be monitored by the terminal device when operating using the first RAT is determined at least in part based on the second number. Further, when the terminal device operates using both the first and second RATs, carriers to be monitored by the terminal device are determined based on a difference between a first sum of the first and second total numbers and a second sum of the first and second numbers. In this way, terminal inter-RAT mobility may be enhanced. Meanwhile, due to the subtraction of the duplicated numbers, terminal operations may be simplified, and terminal performance may be improved.
Abstract:
A method includes communicating with a first cell using a first uplink and downlink configuration and a second cell using a second uplink and downlink configuration, said first cell having predetermined configuration; providing communication feedback for said first cell and the second cell on said second cell using a physical uplink shared channel; and determining a codebook size for said feedback in dependence on downlink assignment indicator information received in an uplink grant.
Abstract:
A method includes communicating with a first cell using a first uplink and downlink configuration and a second cell using a second uplink and downlink configuration, said first cell having predetermined configuration; providing communication feedback for said first cell and the second cell on said second cell using a physical uplink shared channel; and determining a codebook size for said feedback in dependence on downlink assignment indicator information received in an uplink grant.
Abstract:
An apparatus and a method are provided, by which at least one virtual antenna port is created which includes a plurality of reference signal ports defined in a physical resource block. Information regarding the at least one virtual antenna port including the definition of the reference signal ports is sent to a user equipment, and reference signals are sent on the plurality of reference signal ports to the user equipment
Abstract:
A method includes communicating with a first cell using a first uplink and downlink configuration and a second cell using a second uplink and downlink configuration, said first cell having predetermined configuration; providing communication feedback for said first cell and the second cell on said second cell using a physical uplink shared channel; and determining a codebook size for said feedback in dependence on downlink assignment indicator information received in an uplink grant.
Abstract:
Various communication systems may benefit from techniques for handling inter-band carrier aggregation (CA). For example, systems of the third generation partnership project (3GPP) long term evolution (LTE) advanced (LTE-A) may benefit from a uplink (UL) downlink (DL) configuration zero handling, particularly in cases where there is no physical hybrid automatic repeat request (HARQ) indicator channel (PHICH). For example, certain embodiments may be applicable to inter-band CA having different UL/DL configuration in use. A method can include triggering in a downlink subframe a first physical uplink shared channel transmission in a first hybrid automatic repeat request process. The method can also include triggering in the downlink subframe a second physical uplink shared channel transmission in a second hybrid automatic repeat request process. The secondary cell can be configured with time division duplex uplink/downlink configuration number zero. The triggerings can be performed by means of a single uplink grant but without a hybrid automatic repeat request indicator.