Wireless transmission in shared wireless medium environments
Support of coexistence of wireless transmission equipment in shared wireless medium environments is disclosed, which is applicable to various types of wireless transmission equipment. For instance, a wireless power transmission system (WPTS) delivers power to wireless power receiver clients via transmission of wireless power signals using one or more frequencies and/or channels within shared wireless medium environments in which other wireless equipment is operating, such as access points and stations in wireless local area networks (WLANs). The WPTS is configured to co-exist with the operations of the other wireless equipment within the shared wireless medium environment by adapting its transmission operations to utilize frequencies or channels that do not interfere with other equipment and/or implementing co-channel and shared channels operations under which access to channels is implemented using standardized WLAN protocols such as PHY and MAC protocols used for 802.11 (Wi-Fi™) networks.
1. A wireless power transmission system (WPTS), comprising:
an antenna array comprising radio frequency (RF) antennas; and
control logic that is operatively coupled to the antenna array to perform operations, comprising:
detecting one or more data encoded-based wireless networks within a shared wireless medium environment comprising the WPTS; and
based on respective determined directions of a beacon signal that has been received via respective antennas of the RF antennas, transmitting respective power signals from the respective antennas to one or more wireless power receiver clients using a channel that has been determined to be utilized by at least one of the one or more data encoded-based wireless networks.
2. The wireless power transmission system of claim 1 , wherein the transmitting of the respective power signals further comprises:
based on the respective determined directions of the beacon signal, tracking respective locations of the one or more wireless power receiver clients; and
transmitting, via the respective antennas, the respective power signals to the respective locations.
3. The wireless power transmission system of claim 2 , wherein the tracking of the respective locations further comprises:
determining, via the respective antennas, an angle of incidence of the beacon signal;
based on the angle of incidence of the beacon signal, determining a distance from an antenna of the respective antennas to a wireless power receiver client of the one or more wireless power receiver clients; and
based on the angle of incidence and the distance, tracking a location of the respective locations of the wireless power receiver client.
4. The wireless power transmission system of claim 2 , wherein the tracking of the respective locations further comprises:
determining, via the respective antennas, an angle of incidence of the beacon signal;
based on a received signal strength of the beacon signal, determining a distance from an antenna of the respective antennas to a wireless power receiver client of the one or more wireless power receiver clients; and
based on the angle of incidence and the distance, tracking a location of the respective locations of the wireless power receiver client.
5. The wireless power transmission system of claim 2 , wherein the tracking of the respective locations further comprises:
determining, via the respective antennas, an angle of incidence of the beacon signal;
based on the angle of incidence of the beacon signal, determining a direction of the determined directions.
6. The wireless power transmission system of claim 1 , wherein the one or more data encoded-based wireless networks comprise an Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless local area network (WLAN), and wherein the channel has been determined to be utilized by the IEEE 802.11 WLAN.
7. The wireless power transmission system of claim 6 , wherein the transmitting of the respective power signals further comprises:
selecting, using an IEEE 802.11 Media Access Channel (MAC) protocol, WPTS time slots during which the WPTS is to access the shared wireless medium environment; and
transmitting, using the channel, the respective power signals to the one or more wireless power receiver clients during at least a portion of at least a time slot of the WPTS time slots.
8. The wireless power transmission system of claim 7 , wherein the operations further comprise:
during at least the portion of at least the time slot of the WPTS time slots, at least one of transmitting data to the one or more wireless power receiver clients or receiving transmissions from the one or more wireless power receiver clients.
9. The wireless power transmission system of claim 1 , wherein the operations further comprise:
identifying a data encoded-based wireless network of the one or more data encoded-based wireless networks that utilizes a carrier-sense multiple access with collision avoidance (CSMA/CA) protocol to access the channel; and
based on the CSMA/CA protocol,
reserving time slots, and
at least one of transmitting, during the time slots via the channel, the respective wireless power signals to the one or more wireless power receiver clients, or
receiving, during the time slots via the channel, a transmission from a wireless power receiver client of the one or more wireless power receiver clients.
10. The wireless power transmission system of claim 1 , wherein the transmitting further comprises:
identifying WPTS time slots during which the WPTS is to access the shared wireless medium environment; and
transmitting, during at least a portion of at least a time slot of the WPTS time slots via the channel, the respective wireless power signals to the one or more wireless power receiver clients.
11. A wireless power transmission system (WPTS) comprising:
an antenna array comprising radio frequency (RF) antennas;
a detector that detects one or more data encoded-based wireless networks in a shared wireless medium environment comprising the WPTS; and
a transmitter that transmits, based on respective determined directions of a beacon signal that has been received via the antenna array, respective power signals from multiple antennas of the RF antennas to one or more wireless power receiver clients using at least one channel that is being utilized by at least one of the one or more data encoded-based wireless networks.
12. The wireless power transmission system of claim 11 , wherein the one or more data encoded-based wireless networks comprise an Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless local area network (WLAN), and wherein the transmitter, based on a determination that a channel of the at least one channel is being utilized by the IEEE 802.11 WLAN, transmits, via the channel, a portion of the respective wireless power signals to a wireless power receiver client of the one or more wireless power receiver clients.
13. The wireless power transmission system of claim 12 , wherein the portion is a first portion, and wherein the transmitter, based on a selection, using an IEEE 802.11 Media Access Channel (MAC) protocol, of WPTS time slots during which the WPTS is to access the shared wireless medium environment, transmits, during at least a second portion of the WPTS time slots via the channel, the first portion of the respective wireless power signals to the one or more wireless power receiver clients.
14. A method, comprising:
detecting, by a wireless power transmission system (WPTS) comprising a processor, operation of a data encoded-based wireless network in a shared wireless medium environment comprising the WPTS, wherein the data encoded-based wireless network utilizes a corresponding frequency; and
facilitating, by the WPTS, operating the WPTS concurrently with the operation of the data encoded-based wireless network, wherein the WPTS comprises an antenna array comprising radio frequency (RF) antennas, wherein the WPTS transmits, based on respective determined directions of a beacon signal that has been received via respective antennas of the RF antennas, power signals from the respective antennas to a wireless power receiver device using a frequency that overlaps the corresponding frequency utilized by the data encoded-based wireless network.
15. The method of claim 14 , further comprising:
determining, by the WPTS via the respective antennas, an angle of incidence of the beacon signal; and
based on the angle of incidence of the beacon signal, determining, by the WPTS, a direction of the determined directions.
16. The method of claim 14 , further comprising:
based on the respective determined directions of the beacon signal, determining, by the WPTS, a location of the wireless power receiver device; and
transmitting, by the WPTS via the respective antennas, the power signals to the location of the wireless power receiver device.
17. The method of claim 16 , wherein the determining of the location comprises:
determining, via the respective antennas, an angle of incidence of the beacon signal;
based on a characteristic of the beacon signal being a received signal strength of the beacon signal or the angle of incidence of the beacon signal, determining a distance from an antenna of the respective antennas to the wireless power receiver device; and
based on the characteristic of the beacon signal and the distance, determining the location of the wireless power receiver device.
18. The method of claim 14 , wherein the frequency that overlaps the corresponding frequency is a first frequency, and further comprising:
utilizing, by the WTPS, an IEEE 802.11 Media Access Channel protocol and an IEEE 802.11 Physical Layer protocol to select WPTS time slots during which the WPTS is to access the shared wireless medium environment; and
transmitting, by the WTPS, wireless power signals to the wireless power receiver device during at least some of the WPTS time slots, wherein the wireless power signals employ a second frequency overlaps with a co-channel frequency.
19. The method of claim 18 , further comprising:
transmitting, by the WPTS, data to the wireless power receiver device, or
receiving, by the WPTS, transmissions from the wireless power receiver device during at least some of the WPTS time slots.
20. The method of claim 14 , further comprising:
detecting, by the WPTS, a change in utilization of the shared wireless medium environment under which the corresponding frequency that was being used by the data encoded-based wireless network becomes available; and
transmitting, by the WPTS, power signals with the WPTS to the wireless power receiver device using the frequency.