Claims:1. A communication device comprising:
an evaluator configured to evaluate one or more criteria, wherein a first criterion of the one or more criteria comprises detecting an object;
a determiner configured to determine one or more beam pairs from a plurality of potential beam pairs to use in communications with a second device based on the evaluation of the one or more criteria and transmit an indication of one or more partner-side beams of a selected beam pair of the one or more beam pairs to the second device; and
a beam controller configured to adjust an antenna to communicate with the second device via a device-side beam of the selected beam pair.
, Description:Technical Field
[0002] Various embodiments relate generally to methods and devices for radiation exposure control in beamforming technologies.

Background
[0003] Many emerging communication technologies, such as 5G New Radio (NR) and WiGig, have identified beamforming as a way to increase radio link strength. However, while beamforming may increase link sensitivity, it may also increase RF exposure power to humans. For example, when a device uses beamforming to focus its transmissions in a narrow direction, the resulting beam may deliver more radio energy to a focused area. When this focused area is pointed at a human user, the device may deliver high levels of radiation to them. Various regulators, including the Federal Communications Commission (FCC) and the International Commission on Non-Ionizing Radiation Protection (ICNIRP), and standardization bodies like the 3rd Generation Partnership Project (3GPP) have therefore introduced stringent requirements that limit the amount of radiation that a device can deliver to humans.

Brief Description of the Drawings
[0004] In the drawings, like reference characters generally refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the invention. In the following description, various embodiments of the invention are described with reference to the following drawings, in which:
FIG. 1 shows an exemplary general network for wireless communications according to some aspects;
FIG. 2 shows an exemplary internal configuration of a device architecture according to some aspects;
FIG. 3A and 3B show exemplary beamforming architectures according to some aspects;
FIG. 4 shows an exemplary wireless communication network with beamforming devices according to some aspects;
FIG. 5 shows an exemplary internal configuration of a device architecture according to some aspects;
FIG. 6 shows an exemplary flowchart describing a body detection-based beam selection according to some aspects;
FIG. 7 shows an exemplary flowchart describing a body detection-based beam selection between a terminal device and a gNB according to some aspects;
FIG. 8 shows an exemplary internal diagram a terminal device depicting components for implementing beam selection methods according to some aspects;
FIG. 9 shows an exemplary internal configuration of controller for implementing beam selection methods according to some aspects
FIG. 10 shows an exemplary flowchart describing a method for a communication device to determine a beam pair to communicate with a second device according to some aspects;
FIG. 11 shows an exemplary flowchart describing a method for a communication device to update a beam pair to communicate with a second device according to some aspects;
FIG. 12 shows an exemplary high-powered beam from a terminal device according to some aspects;
FIG. 13 shows an exemplary illustration depicting an exemplary beam sweeping scheme according to some aspects;
FIG. 14 shows an exemplary diagram depicting exposure areas and transmission beam patterns according to aspects;
FIG. 15 shows an exemplary selective beam narrowing and/or widening scheme according to some aspects;
FIG. 16 shows an exemplary beam-finding reception method for an array reception controller to control one or more antenna arrays according to some aspects;
FIG. 17 shows an exemplary illustration for cluster identification of antenna array elements for beam-finding reception according to some aspects;
FIG. 18 shows an exemplary internal diagram of a terminal device with components for beam controlling according to some aspects;
FIG. 19 shows an exemplary internal configuration of controller for beam controlling according to some aspects;
FIG. 20 shows an exemplary flowchart for determining a transmission beam scheme to use in wireless communications according to some aspects;
FIG. 21 shows an exemplary internal diagram of a terminal device with components for beam-finding reception according to some aspects;
FIG. 22 shows an exemplary internal configuration of controller for beam-finding reception according to some aspects;
FIG. 23 shows an exemplary flowchart for beam-finding reception according to some aspects;
FIG. 24 shows an exemplary internal configuration of a terminal device according to some aspects;
FIG. 25 shows an exemplary flowchart for mitigating human RF exposure with channel switching according to some aspects;
FIG. 26 shows an exemplary scenario of a sensor detecting an object according to some aspects;
FIG. 27 shows an example of constant and time-dependent human exposure power limits according to some aspects;
FIG. 28 shows an exemplary timing diagram for triggering channel switches according to some aspects;
FIG. 29 shows an exemplary flow chart for timing channel switches based on a time-dependent human exposure power limit according to some aspects;
FIG. 30 shows an exemplary flow chart for scheduling data transmission based on a time-dependent power limit according to some aspects;
FIGs. 31 and 32 show exemplary methods of performing radio communications according to some aspects;
FIG. 33 shows an example of a terminal device selecting sectors for beamsweeping based on object sensing according to some aspects;
FIG. 34 shows an example of a terminal device selecting sectors for beamsweeping based on detecting a human object according to some aspects;
FIG. 35 shows an exemplary internal configuration of a terminal device according to some aspects;
FIG. 36 shows an exemplary flowchart for selecting sectors to beamsweep based on object sensing according to some aspects;
FIG. 37 shows an exemplary internal configuration of a terminal device with a radar sensor that includes the terminal device’s antenna array according to some aspects;
FIG. 38 shows an exemplary internal configuration of a radar sensor using a terminal device’s antenna array according to some aspects; and
FIGs. 39 and 40 show exemplary methods of performing radio communications according to some aspects.

Description
[0005] The following detailed description refers to the accompanying drawings that show, by way of illustration, specific details and aspects of embodiments in which the invention may be practiced.
[0006] The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” The words “plurality” and “multiple” in the description and claims refer to a quantity greater than one. The terms “group,” “set,” “sequence,” and the like refer to a quantity equal to or greater than one. Any term expressed in plural form that does not expressly state “plurality” or “multiple” similarly refers to a quantity equal to or greater than one. The term “lesser subset” refers to a subset of a set that contains less than all elements of the set. Any vector and/or matrix notation utilized herein is exemplary in nature and is employed for purposes of explanation. Aspects of this disclosure described with vector and/or matrix notation are not limited to being implemented with vectors and/or matrices and the associated processes and computations may be performed in an equivalent manner with sets or sequences of data or other information.