An approach is described for an access node configured for ultra-reliable and low latency (URLLC) transmission using multi-transmission reception point (TRP) to a UE. The access node includes processor circuitry and radio front end circuitry. The processor circuitry is configured to allocate resource blocks into a first portion and a second portion based on a resource indication value (RIV), a length of contiguously allocated resource blocks (LRBS) and a fraction. The radio front end circuitry is configured to transmit the first portion to the UE via a first transmission reception point (TRP1), and transmit the second portion to the UE via a second transmission reception point (TRP2).

The present disclosure relates to methods and devices for wireless communication including an apparatus, e.g., a UE and/or a base station. In one aspect, the apparatus may measure one or more candidate bandwidths, each of the one or more candidate bandwidths corresponding to a candidate channel. The apparatus may also select an operating bandwidth of the one or more candidate bandwidths based on the measured one or more candidate bandwidths, the operating bandwidth corresponding to an operating channel. Additionally, the apparatus may adjust an energy detection threshold of a reference bandwidth based on a sensing bandwidth. The apparatus may also determine whether a transmission medium is available based on at least one of the adjusted energy detection threshold or an interference level of at least one signal.

According to one embodiment, a user equipment for use in a mobile communication system is configured to: receive control information including a first field and a second field via a control channel, the first field indicating one of N (N≧2) resource block group (RBG) sets and the second field including a bitmap, wherein each bit of the bitmap is used to indicate whether a corresponding resource block (RB) in the indicated one of the N RBG sets is allocated; interpret the first field and the second field for resource allocation in the control information; and receive data using the control information. An RBG set n (0≦n<N) includes every N.sub.th RBG starting from n.sub.th RBG, an RBG includes one or more consecutive RBs, and an RB includes a plurality of consecutive subcarriers.

A network element for use in a mobile communications system and a method of using a network element for communicating data to/from mobile communications devices in a mobile communications system. The network element can provide a wireless access interface for communicating data to/from the mobile communications devices, the wireless access interface including: on a downlink a host carrier, the host carrier providing plural resource elements across a first frequency range; transmit data for a first group of mobile communications devices, wherein the data is distributed within the plural resource elements across the first frequency range; a virtual carrier via the wireless access interface, the virtual carrier providing one or more resource elements within a second frequency range which is within and smaller than the first frequency range; and transmit data for a second group of mobile communications devices via the virtual carrier.

Techniques for minimizing the loss of radio signals transmitted on and/or received from serving cells in a multi-carrier system by selectively adapting the time instance at which a wireless terminal: (1) changes its radio frequency (RF) bandwidth or activates a second RF chain or any additional RF chain for measuring on one or more secondary serving cells, and/or (2) performs setup or release of one or more secondary serving cells. An example method, implemented in a radio network node, comprises determining (510) a scheduling instance during which a wireless terminal is expected to be scheduled on at least one cell; and, determining (520) a timing at which to send a setup or release command for at least one secondary cell such that the requested set up or release procedure does not coincide with the scheduling instance.

Disclosed are a wireless communication base station device and a division number determination method that improves the frequency diversity effect while maintaining channel estimation accuracy regardless of the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. A determination unit determines the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. Here, the determination unit increases the number of divisions in the frequency domain of the transmission signal from the wireless communication terminal device as the number of pilot blocks included in the transmission signal increases. In addition, a scheduling unit schedules allocation to the frequency resources of the divided transmission signal according to the number of divisions determined by the determination unit.

A method and apparatus for transmitting frames having a long training field (LTF) for a second type of station (STA) in a wireless communication system are provided. For this, STA prepares a frame having a first part for a first type of STA and a second part for the second type of STA; wherein the second part includes multiple LTFs, when the frame is used for MU (Multiple User) transmission scheme or OFDMA (Orthogonal Frequency Divisional Multiple Access) scheme. In case a first LTF having a first number of symbols length and a second LTF having a second number of symbols length, which is greater than the first number of symbols length, are used for the multiple LTFs, the first LTF is extended such that the first LTF and the second LTF have a same number of symbols length. The STA transmits the prepared frame to one or more STAs.

The random access (RA) procedure in NR-U can be improved by enable the NR-U capable UE to choose a suitable BWP and uses this chosen BWP to perform the RA procedure. A suitable BWP is a BWP with a low probability for LBT failure, such as a BWP having a load that is less than a threshold load. For example, whenever the UE has a RA procedure triggered, the UE selects the most suitable BWP based on load information, such as load measurements made by the UE for one or more available BWPs or load information communicated to the UE. The selected BWP for the RA procedure may be different from the UE's currently active BWP, and, in this case, the UE may do a BWP switch before the RA procedure.

A user equipment (UE) is configured to perform rate matching for reference signals under certain conditions. The UE receives information associated with a downlink reference signal for a first radio access technology (RAT), wherein the first RAT is different than a currently camped second RAT, identifies reference signal occasions for the downlink reference signal and receives downlink control information from the second RAT via a physical downlink control channel (PDCCH).

A user equipment (UE) performs uplink (UL) transmissions to a network. The UE receives a frequency domain resource allocation (FDRA) configuration from a network, the FDRA configuration comprising at least one of a first FDRA mode or a second FDRA mode, wherein the first FDRA mode utilizes an FDRA unit comprising a set of consecutive resource blocks (RBs) and the second FDRA mode utilizes an FDRA unit comprising a set of interlaced RBs, when both of the first and second FDRA modes are configured, the UE receives a signal indicating which one of the two FDRA modes are to be used for an uplink (UL) transmission and performs the UL transmission in accordance with the indicated FDRA mode.