Apparatus and method for detecting lateral electromagnetic exposure and device grip for controlling signal transmission
An apparatus including a housing; sensors configured to sense one or more locations upon which a user is gripping the housing; sensors including antenna modules configured to transmit a signal based on the one or more locations upon which the user is gripping the housing. Another aspect relates to an apparatus including a housing; a set of antenna modules situated proximate at different surface locations along the housing; and a controller configured to operate the set of antenna modules to determine at least one or more electromagnetic leakage coupling between at least one pair of antenna modules of the set. In this aspect, the controller may be configured to select one or more of the set of antenna modules for transmitting a signal based on the one or more electromagnetic leakage coupling associated with one or more of the different locations where a user grips the housing, respectively.
1. An apparatus, comprising:
a housing;
a set of antenna modules; and
an antenna module controller configured to:
send a set of polling signals to the set of antenna modules, respectively, to determine one or more locations upon which a user is gripping the housing; and
transmit a signal to one or more target wireless devices based on the determined one or more locations upon which the user is gripping the housing.
2. The apparatus of claim 1 , wherein the antenna module controller is configured to transmit the signal using a selected one or more of the set of antenna modules to ensure that one or more power density of the signal at the one or more locations upon which the user is gripping the housing is at or below a defined limit.
3. The apparatus of claim 1 , wherein the antenna module controller is configured to transmit the signal using at least one of the set of antenna modules with at least one of a set of radiation beams aimed at different directions, respectively, selected based on the determined one or more locations upon which the user is gripping the housing.
4. The apparatus of claim 1 , wherein the antenna module controller is configured to transmit the signal using at least one of the set of antenna modules with a power level based on the determined one or more locations upon which the user is gripping the housing.
5. The apparatus of claim 1 , wherein the antenna module controller is configured to transmit the signal using at least one of the set of antenna modules selected to transmit the signal based on the determined one or more locations upon which the user is gripping the housing.
6. The apparatus of claim 1 , wherein the antenna module controller is configured to send the polling signals to the set of antenna modules during a sounding reference signal (SRS) field of a signal transmission or reception frame.
7. The apparatus of claim 1 , wherein the antenna module controller is configured to send the polling signals to the set of antenna modules during a random-access channel (RACH) field of a signal transmission or reception frame.
8. A method of transmitting a signal, comprising:
sending a set of polling signals to a set of antenna modules, respectively, to determine one or more locations upon which a user is gripping a housing; and
transmitting the signal to one or more target wireless devices based on the one or more locations upon which the user is gripping the housing.
9. The method of claim 8 , wherein said transmitting the signal comprises transmitting the signal using a selected one or more of the set of antenna modules such that one or more power density of the signal at the one or more locations upon which the user is gripping the housing is at or below a defined limit.
10. The method of claim 8 , wherein said transmitting the signal comprises transmitting the signal using at least one antenna module with one of a set of radiation beams aimed at different directions, respectively, selected based on the determined one or more locations upon which the user is gripping the housing.
11. The method of claim 8 , wherein said transmitting the signal comprises transmitting the signal using at least one of the set of antenna modules with a power level based on the determined one or more locations upon which the user is gripping the housing.
12. The method of claim 8 , further comprising selecting at least one of the set of antenna modules for transmitting the signal based on the determined one or more locations upon which the user is gripping the housing.
13. An apparatus, comprising:
a housing;
a set of antenna modules situated proximate different surface locations along the housing; and
a controller configured to:
operate the set of antenna modules to determine one or more electromagnetic leakage coupling between at least one pair of antenna modules of the set;
determine one or more locations on a housing upon which a user is gripping the housing proximate at least one of the set of antenna modules; and
transmit a signal to one or more target wireless devices based on the determined one or more electromagnetic leakage coupling and the determined one or more locations upon which the user is gripping the housing proximate the one or more of the set of antenna modules.
14. The apparatus of claim 13 , wherein the controller is configured to select one or more of the set of antenna modules for transmitting the signal based on the one or more electromagnetic leakage coupling associated with one or more of the different locations where the user grips the housing, respectively.
15. The apparatus of claim 14 , wherein the controller is configured to select the one or more antenna modules to ensure that one or more power density of the signal at the one or more locations upon which the user is gripping the housing is at or below a defined limit.
16. The apparatus of claim 14 , wherein the controller is configured to select one or more radiation beams for transmitting the signal by the one or more antenna modules based on the one or more locations upon which the user is gripping the housing, respectively.
17. The apparatus of claim 14 , wherein the controller is configured to select one or more power levels for transmitting the signal by the one or more antenna modules based on the one or more locations upon which the user is gripping the housing, respectively.
18. A method of transmitting a signal, comprising:
operating a set of antenna modules located proximate different surface locations of a housing to determine one or more electromagnetic leakage coupling between one or more different pairs of antenna modules of the set, respectively;
determining one or more locations upon which a user is gripping the housing proximate at least one of the set of antenna modules; and
transmitting the signal based on the determined one or more electromagnetic leakage coupling and the determined one or more locations upon which the user is gripping the housing proximate the one or more of the set of antenna modules.
19. The method of claim 18 , wherein said transmitting the signal comprises transmitting the signal based on one or more of the different locations upon which the user is gripping the housing, respectively.
20. The method of claim 18 , further comprising selecting one or more antenna modules for transmitting the signal based on the one or more electromagnetic leakage coupling and one or more locations upon which the user is gripping the housing.
21. The method of claim 18 , further comprising selecting one or more radiation beams for transmitting the signal based on the one or more electromagnetic leakage coupling and the one or more locations upon which the user is gripping the housing.
22. The method of claim 18 , further comprising selecting one or more power levels for transmitting the signal based on the one or more electromagnetic leakage coupling and the one or more locations upon which the user is gripping the housing.