A wireless communication method and device are disclosed. The method includes performing channel detection for a carrier in an unlicensed frequency band; and sending a preamble signal on the carrier from a first time-point, in response to the channel detection succeeding, the preamble signal being configured for indicating that the carrier has an ability to transmit a downlink signal.

Systems, methods, and apparatus are provided for automated identification of open space in a wireless communications spectrum, by identifying sources of signal emission in the spectrum by automatically detecting signals, analyzing signals, comparing signal data to historical and reference data, creating corresponding signal profiles, and determining information about the open space based upon the measured and analyzed data in near real-time.

Methods and/or apparatus for reducing or avoiding (IDC) in-device coexistence problems in devices which support multiple communications protocols, e.g., WiFi and LTE, are described. In various embodiments a WiFi AP can request or require devices, e.g., STAs to report IDC information pertinent to the individual device. This is done by sending one or more trigger frames, e.g., as part of a multicast or unicast operation. Alternatively, devices can voluntarily report IDC information. The AP, e.g., WiFi AP, takes the IDC information it receives, e.g., from multiple devices, e.g., STAs, into account when scheduling UL resources to be used by the wireless devices. By taking into consideration the IDC information provided by STAs, IDC conflicts can be avoid even though a WiFi AP is scheduling resources for WiFi communication in devices which are also using resources for another communications standard, e.g, LTE, over which the AP does not have control.

Presented are systems, methods, apparatuses, or computer-readable media for transmission configuration indicator (TCI) switching using listen before talk (LBT) counters. A wireless communication device in an active TCI switching procedure may receive a physical data shared channel with an activation command. The wireless communication device may determine that a target TCI state is absent from an active TCI state list of the physical data shared channel. The wireless communication device may determine whether the target TCI state is known.

Reporting capabilities regarding Cross Carrier Scheduling (CCS) with different Sub-Carrier Spacing (SCS) may include generating a message to send to a base station. The message may comprise an indication of a user equipment's (UE's) capability for CCS with different SCS. Based on the UE's capability for CCS with different SCS, a number of unicast downlink control information (DCI) per physical downlink control channel (PDCCH) monitoring occasion per span may be processed to determine scheduled resources for downlink (DL) and uplink (UL) signaling or channels. The DL and UL signaling or channels may be processed using the scheduled resources.

A UE may establish a communications link with a base station. The UE may determine at least two radio network temporary identifiers (RNTIs) associated with the communications link, wherein each of the at least two RNTIs is associated with a respective relay device of a plurality of relay devices. The UE may receive, from a first relay device of the plurality of relay devices, at least one first stream associated with a first RNTI of the at least two RNTIs, wherein the at least one first stream carries data or control information associated with the communications link. The UE may receive, from a second relay device of the plurality of relay devices, at least one second stream associated with a second RNTI of the at least two RNTIs, wherein the at least one second stream carries data or control information associated with the communications link.

Apparatuses, methods, and systems are disclosed for beam switching after Listen-Before-Talk (“LBT”) procedure. One apparatus includes a processor and a transceiver that is operable on unlicensed spectrum, wherein the transceiver supports a plurality of device panels. The processor performs a first LBT procedure using omni-directional sensing to acquire a first Channel Occupancy Time (“COT”) and performs a first uplink transmission of a first transport block (“TB”) during the first COT and using a first device panel in response to successful LBT. Here, the first uplink transmission uses a first portion of the first COT. The processor performs a directional LBT procedure for a second device panel to acquire a remaining portion of the first COT.

The present disclosure relates to a wireless communication system, and specifically, a method and an apparatus therefor, the method comprising: generating first A/N information for a first PDSCH group and second A/N information for a second PDSCH group, wherein each PDSCH group is a basic group for an A/N request; based on an A/N for a specific PDSCH not belonging to any PDSCH group being transmitted with the first and second A/N information, appending the A/N for the specific PDSCH after the first and second A/N information; and transmitting control information including the first and second A/N information and the A/N for the specific PDSCH.

According to an embodiment of the present disclosure, a system and a method may include receiving, by a first user equipment (UE), configuration information for physical sidelink feedback channel (PSFCH) resources; performing, by the first UE in response to the receiving, a first listen-before-talk (LBT) sensing for a first PSFCH resource of the PSFCH resources; and determining that the first LBT sensing failed and in response, transmitting a signal over a second PSFCH resource of the PSFCH resources.

This disclosure relates to random access channel (RACH) enhancements for new radio unlicensed (NR-U) communications. Specifically, the present aspects include determining whether a gap length between a two-step random access channel (RACH) preamble transmission and a physical uplink shared channel (PUSCH) transmission satisfies a gap condition. The present aspects further include selecting a transmission procedure associated with the determined gap length for the PUSCH transmission. The present aspects further include performing the PUSCH transmission in accordance with the selected transmission procedure.