Abstract:
Systems, methods, and apparatuses for sounding reference signal (SRS) management in carrier aggregation (CA) are described. A user equipment (UE) may be scheduled for overlapping (e.g., concurrent) transmissions of SRS and uplink control or data on different cells of a CA configuration. In some cases, the SRS transmission may be dropped (e.g., the UE may refrain from transmitting a scheduled SRS). While in some cases, the UE may transmit both SRS and another uplink message in overlapping time intervals on different cells (e.g., SRS may be transmitted concurrently with another uplink message). A determination of whether to transmit or drop SRS may be based on whether the different cells have different cyclic prefix (CP) lengths or on whether the SRS is scheduled to be transmitted in a special subframe of a time division duplexing (TDD) configuration, for example.
Abstract:
A wireless device includes: a first radio and first transceiver configured to transmit and receive according to a first radio access technology; a second radio and second transceiver configured to transmit and receive according to a second radio access technology; a first antenna and a second antenna connected to the first radio and the second radio; a switch; and a control unit configured to control the switch to configure connections of the first and second antennas to the first and second radios. The control unit is configured to control the switch to disconnect the second radio from the second antenna in response to a receiving, by the second radio through the second antenna, a signal that is below a predetermined threshold, and to connect the second radio to the first antenna during a wakeup period of the second radio.
Abstract:
This disclosure provides systems, methods, and apparatus for antenna selection for different radio access technologies. An apparatus can include a plurality of antennas and a plurality of radio access technology modules each configured to communicate according to a different radio access technology. The apparatus further includes a controller configured to switch communication circuits of each of the radio access technology modules to communicate via a corresponding one or more of the plurality of antennas. The apparatus further includes a switching manager configured to manage a plurality of switch configurations each defining a mapping between each of the radio access technology modules and the antennas. The switching manager is further configured to store a switch configuration used for a first radio access technology module and cause the controller to maintain the switch configuration in place in response to a network handover. Other aspects, embodiments, and features are also claimed and described.
Abstract:
A user equipment (UE) may monitor multiple beam pair links (BPLs) including a first BPL currently used by the UE to communicate with a network node (e.g., a base station), and a second BPL. The first BPL comprises a first network beam and a first UE beam, and the second BPL comprises a second network beam and a second UE beam. The UE may decide to switch beams from using the first BPL to using the second BPL based on signaling from the network node or autonomously. When the beam switch is made, the UE switches uplink (UL) transmission from over the first UE beam to over the second UE beam. After the beam switch is made, the UE transmits in the UL over the second UE beam using UL timing adjusted based on the first and second propagation delays.
Abstract:
Systems, methods, and apparatuses for sounding reference signal (SRS) management in carrier aggregation (CA) are described. A user equipment (UE) may be scheduled for overlapping (e.g., concurrent) transmissions of SRS and uplink control or data on different cells of a CA configuration. In some cases, the SRS transmission may be dropped (e.g., the UE may refrain from transmitting a scheduled SRS). While in some cases, the UE may transmit both SRS and another uplink message in overlapping time intervals on different cells (e.g., SRS may be transmitted concurrently with another uplink message). A determination of whether to transmit or drop SRS may be based on whether the different cells have different cyclic prefix (CP) lengths or on whether the SRS is scheduled to be transmitted in a special subframe of a time division duplexing (TDD) configuration, for example.
Abstract:
Systems and methods for antenna selection in a wireless terminal with two radios are provided. Signals received using first and second antennas are demodulated by first and second modems according to first and second protocols. A receive path between the second antenna and the second modem can be controlled to receive signals according to the first protocol. A performance measure of demodulating, according to the first protocol, a signal received using the second antenna is determined. The performance measure may be determined using a mirror module in the second modem or using a search module in the first modem. The wireless terminal switches antennas so that the first modem demodulates a signal received using the second antenna, if the performance measure for using the second antenna is such that the switch would improve performance of the first modem.
Abstract:
This disclosure provides systems, methods, and apparatus for antenna switching. In one embodiment, a wireless communication apparatus is provided. The wireless communication apparatus includes a plurality of antennas including a first antenna and a second antenna. The wireless communication apparatus further includes at least one receive circuit including a first receive circuit. The wireless communication apparatus further includes a controller configured to selectively switch the first receive circuit from receiving wireless communications via the first antenna to receive wireless communications via the second antenna if one or more performance characteristics of the first antenna are below a threshold in one or more measurement cycles, the one or more measurement cycles including a wake-up cycle outside of a predetermined wake-up cycle. Other aspects, embodiments, and features are also claimed and described.
Abstract:
Exemplary embodiments are related to antenna tuners. A device may include a transceiver configured to operate in a frequency division duplex (FDD) network. The device may also include an antenna tuner coupled to the transceiver. Further, the device includes a processor configured to tune the antenna tuner for a receive frequency if the device is operating in receive mode and tune the antenna tuner for a transmit frequency if the device is operating in a transmit and receive mode.
Abstract:
A method for antenna switching is described. The method includes transmitting using a first antenna. The method also includes determining that a trigger occurs to switch to transmitting using a second antenna. The trigger is based on a combination of a physical uplink shared channel (PUSCH) maximum transmit power level (MTPL) counter and a physical uplink control channel (PUCCH) MTPL counter. The method further includes switching to transmitting using the second antenna based on the determination.
Abstract:
A wireless device includes: a first radio and first transceiver configured to transmit and receive according to a first radio access technology; a second radio and second transceiver configured to transmit and receive according to a second radio access technology; a first antenna and a second antenna connected to the first radio and the second radio; a switch; and a control unit configured to control the switch to configure connections of the first and second antennas to the first and second radios. The control unit is configured to control the switch to disconnect the second radio from the second antenna in response to a receiving, by the second radio through the second antenna, a signal that is below a predetermined threshold, and to connect the second radio to the first antenna during a wakeup period of the second radio.