Provided is a terminal device configured to communicate with a base station device. The device includes a transmission unit that, upon transmission of a PRACH in a primary cell in a subframe i.sub.1 of a first CG (transmission of a first PRACH) overlapping transmission of a PRACH in a subframe i.sub.2 of a second CG (transmission of a second PRACH) and the first PRACH being ready to be transmitted in a subframe at least one before the subframe i.sub.1, transmits the first PRACH.

Provided is a terminal device configured to communicate with a base station device. The device includes a transmission unit that, upon transmission of a PRACH in a primary cell in a subframe i.sub.1 of a first CG (transmission of a first PRACH) overlapping transmission of a PRACH in a subframe i.sub.2 of a second CG (transmission of a second PRACH) and the first PRACH being ready to be transmitted in a subframe at least one before the subframe i.sub.1, transmits the first PRACH.

Examples disclosed herein control radiation exposure for a wireless computing device. In one example, the wireless computing device monitors for instances of upload transmissions from a wireless communications module of the wireless computing device, performs a running average of the instances of upload transmissions over a period of time, and determines whether the running average exceeds a threshold value. If the running average exceeds the threshold value, the wireless computing device adjusts upload transmissions from the wireless communications module to control the radiation exposure for the wireless computing device.

Examples disclosed herein control radiation exposure for a wireless computing device. In one example, the wireless computing device monitors for instances of upload transmissions from a wireless communications module of the wireless computing device, performs a running average of the instances of upload transmissions over a period of time, and determines whether the running average exceeds a threshold value. If the running average exceeds the threshold value, the wireless computing device adjusts upload transmissions from the wireless communications module to control the radiation exposure for the wireless computing device.

A random access method and an apparatus of a terminal for performing random access procedure to multiple base stations in parallel in a Long Term Evolution (LTE) system supporting dual connectivity are provided. The method includes determining whether a first preamble transmission to a first cell of a first base station is overlapped with a second preamble transmission to a second cell of a second base station in a time domain, determining, when the first preamble transmission is overlapped with the second preamble transmission in the time domain, whether a sum of transmit powers calculated for the first and second preamble transmissions is greater than a maximum allowed transmit power of the terminal, and controlling, when the sum of the first and second preamble transmit powers is greater than the maximum allowed transmit power, the transmit power calculated for the second preamble transmission.

A random access method and an apparatus of a terminal for performing random access procedure to multiple base stations in parallel in a Long Term Evolution (LTE) system supporting dual connectivity are provided. The method includes determining whether a first preamble transmission to a first cell of a first base station is overlapped with a second preamble transmission to a second cell of a second base station in a time domain, determining, when the first preamble transmission is overlapped with the second preamble transmission in the time domain, whether a sum of transmit powers calculated for the first and second preamble transmissions is greater than a maximum allowed transmit power of the terminal, and controlling, when the sum of the first and second preamble transmit powers is greater than the maximum allowed transmit power, the transmit power calculated for the second preamble transmission.

Embodiments of an access point (AP), station (STA) and method for subcarrier scaling are generally described herein. The AP may transmit a high efficiency (HE) physical layer convergence procedure (PLCP) protocol data unit (PPDU) that includes a legacy long training field (L-LTF), a legacy signal (L-SIG) field, and an HE signal (HE-SIG) field. The HE-SIG may be based on HE-SIG symbols mapped to a group of HE subcarriers that includes legacy subcarriers and HE extension subcarriers. The L-LTF may be based on L-LTF pilot symbols mapped to the legacy subcarriers. The L-SIG may be based on L-SIG legacy symbols mapped to the legacy subcarriers and L-SIG extension pilot symbols mapped to the HE extension subcarriers. The AP may scale a per-subcarrier power of the L-SIG extension pilot symbols to match a per-subcarrier power of the L-LTF pilot symbols.

The exemplary embodiments describe a method for use in a user equipment, a method for use in a radio base station; a user equipment and a radio base station. According to the exemplary embodiments, the user equipment is configured to decide on application or not of a power reduction and to indicate it decision in a power headroom report intended for transmission to the radio base station. The radio base station is configured to receive the power headroom report and based on the indicated information in the received power headroom report, the base station in made aware of an additional or special power backoff (e.g. to fulfill SAR requirements) has been applied and thereby able to distinguish it from normal power backoff or power reduction.

Disclosed are systems and techniques for performing sidelink communications. For instance, a first client device can determine a first transmit power parameter for transmitting sidelink communications. The first transmit power parameter can either be received from a base station associated with the first client device or it can be a default parameter based on the first client device not being associated with a base station. The first client device can transmit, to a second client device, a first sidelink transmission having a first power level corresponding to the first transmit power parameter. The first client device can receive, from the second client device, a first sidelink reception having a second power level corresponding to a second transmit power parameter.

Disclosed are systems and techniques for performing sidelink communications. For instance, a first client device can determine a first transmit power parameter for transmitting sidelink communications. The first transmit power parameter can either be received from a base station associated with the first client device or it can be a default parameter based on the first client device not being associated with a base station. The first client device can transmit, to a second client device, a first sidelink transmission having a first power level corresponding to the first transmit power parameter. The first client device can receive, from the second client device, a first sidelink reception having a second power level corresponding to a second transmit power parameter.