A system and method for an efficient port switching technique for line-of-sight multiple-input multiple-output communications by a base station is provided. The base station includes an antenna array comprising a first number of antenna ports. The base station also includes a transceiver configured to communicate in a wireless communication medium. The base station further includes a processor. The processor is configured to determine, based on the wireless communication medium, one or more parameters of the base station or a receive base station. The processor also is configured to select, based on the one or more first parameters and one or more second parameters, a second number of antenna ports to perform a communication with the receive base station.

The present disclosure relates to wireless communication methods, network devices, and terminal devices. One example method includes receiving, by a terminal device, configuration information sent by a network device, where the configuration information is used to indicate a beam sweeping type, and determining, by the terminal device, the beam sweeping type based on the configuration information.

A base station and/or a wireless device may perform a random access procedure. A downlink transmission for initiating a random access procedure may indicate an antenna panel for transmission of a random access preamble. A slot for transmission of the random access panel, from the wireless device, may be determined based on an antenna panel activation delay.

Certain aspects of the present disclosure provide techniques for sounding reference signal (SRS) frequency hopping enhancements. An example method performed by user equipment generally includes determining a first sounding reference signal (SRS) frequency hopping pattern for transmitting one or more SRSs; determining an antenna switch will occur during the transmission of the one or more SRSs; determining a second SRS frequency hopping pattern for transmitting the one or more SRSs, wherein determining the second SRS frequency hopping pattern comprises using the first SRS frequency hopping pattern to generate the second SRS frequency hopping pattern based on the determined antenna switch; and transmitting a first set of SRSs of the one or more SRSs according to the first SRS frequency hopping pattern and transmitting a second set of SRSs of the one or more SRSs according to the second SRS frequency hopping pattern.

According to an example aspect of the present invention, there is provided a method, including receiving, by a wireless device of a first wireless network, a control request frame from a second access node of a second wireless network, the control request frame including at least a number of nulls for the wireless device. The wireless device selects a subset of antenna elements, wherein the number of antenna elements is in accordance with the number of nulls for the wireless device, and the antenna elements are selected based on reception powers of antenna elements of at least a frame from a first access node of the first wireless network and/or the second access node of the second wireless network. The wireless device transmits a control response frame with the selected antenna elements, and a data frame to the first access node with the selected antenna elements.

Methods and apparatus for using a first number of antennas at one base station, e.g., at a first CBSD, in combination with a second, e.g., lesser number of antennas at another base station to provide different wireless terminals communications channels with different channel conditions are described. A ‘relay mode’ of operation at the second base station facilitates communication of data from the first base station. In this way the second base station is used to relay data sent from the first base station while the UE perceives the data as having been sent over the air by the first base station. The channels from the first and second base stations operate together providing a composite channel that will have different channel conditions than would be possible using simply the antennas of the first base station. Differences in channels to different UEs facilitates transmission scheduling at the first base station.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be configured to communicating a first message with a base station in accordance with a first antenna configuration, a first set of resources, or both. The UE may transmit capability signaling indicating a capability of the UE to adjust the first antenna configuration, the first set of resources, or both, for channel reliability management. The UE may receive, based on the capability signaling, control signaling indicating one or more parameters for channel unreliability event detection associated with a downlink channel between the base station and the UE. The UE may then communicate a second message with the base station in accordance with a second antenna configuration, a second set of resources, or both, based at least in part on a channel unreliability event detected in accordance with the one or more parameters.

A fire, burglary or access control security communicator having an antenna switching system and method that is external to the cell module to allow complete switching from a primary to a secondary antenna based on signal strength, error rate or other performance parameters.

A user terminal equipment and a method for antenna selection are provided according to the disclosure. The user terminal equipment includes a first signal transceiving antenna, K second signal transceiving antennas, and a rotating assembly. The first signal transceiving antenna and the K second signal transceiving antennas are disposed on the rotating assembly and configured to be driven to rotate by the rotating assembly, where K is a positive integer. The first signal transceiving antenna is configured to operate in a first frequency band, the K second signal transceiving antennas are configured to operate in a second frequency band, and the first frequency band is different from the second frequency band. The first signal transceiving antenna and the K second signal transceiving antennas are carried on a same rotating assembly to realize simultaneous rotation of two antennas operating in different frequency bands.

A wireless communication device may receive with one of N antennas a signal processing message indicating a number up to N signals to process. Each of the N antennas may used to receive a communication. The indicated number of up to N signals may be processed and data from the indicated number of up to N signals recovered.