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 phases 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 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.
3. The wireless power transmission system of claim 2 , 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.
4. The wireless power transmission system of claim 3 , 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.
5. The wireless power transmission system of claim 3 , wherein the IEEE 802.11 MAC protocol supports a carrier-sense multiple access with collision avoidance (CSMA/CA) protocol employing a distributed coordination function, and wherein the transmitting of the respective power signals further comprises:
based on the CSMA/CA protocol, transmitting, using the channel, the respective power signals to the one or more wireless power receiver clients.
6. The wireless power transmission system of claim 5 , wherein the operations further comprise:
operating the WPTS as an IEEE 802.11 WLAN access point device or an emulated IEEE 802.11 WLAN access point device for management of access to the shared wireless medium environment using the CSMA/CA protocol.
7. 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.
8. The wireless power transmission system of claim 1 , wherein the transmitting further comprises:
in response to determining a change in utilization of the shared wireless medium environment representing that the channel has become available, transmitting the respective power signals to the one or more wireless power receiver clients.
9. 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.
10. The wireless power transmission system of claim 1 , wherein the one or more data encoded-based wireless networks comprises Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless local area network (WLANs), and wherein the channel has been determined to be utilized by a device of the IEEE 802.11 WLANs.
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 phases 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. The wireless power transmission system of claim 13 , wherein the IEEE 802.11 MAC protocol supports a carrier-sense multiple access with collision avoidance (CSMA/CA) scheme employing a distributed coordination function, and wherein the CSMA/CA scheme supports sharing of the channel.
15. 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 or channel; 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 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 or a channel that overlaps the corresponding frequency or channel utilized by the data encoded-based wireless network.
16. The method of claim 15 , wherein the data encoded-based wireless network comprises an Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless local area network (WLAN), and the method further comprising:
detecting, by the WPTS for the IEEE 802.11 WLAN,
the corresponding channel being utilized by the IEEE 802.11 WLAN, and
an IEEE 802.11 Media Access Channel (MAC) protocol and an IEEE 802.11 Physical Layer (PHY) protocol utilized by the IEEE 802.11 WLAN; and
identifying, by the WPTS, a co-channel, the IEEE 802.11 MAC protocol and the IEEE 802.11 PHY protocol to be implemented by the WPTS.
17. The method of claim 16 , wherein the IEEE 802.11 MAC protocol supports a carrier-sense multiple access with collision avoidance (CSMA/CA) scheme employing a distributed coordination function, and the method further comprising:
implementing, by the WPTS, the CSMA/CA scheme to support sharing of the co-channel,
operating the WPTS as one of an IEEE 802.11 WLAN access point or an emulated IEEE 802.11 WLAN access point under which the IEEE 802.11 MAC and the IEEE 802.11 PHY protocols are implemented for management of access to the shared wireless medium environment using the CSMA/CA scheme.
18. The method of claim 16 , wherein the frequency or the channel that overlaps the corresponding frequency or channel are a first frequency or a first channel, respectively, and further comprising:
utilizing, by the WTPS, the co-channel, the IEEE 802.11 MAC protocol and the IEEE 802.11 PHY 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 or a second channel that overlaps with a co-channel frequency or the co-channel, respectively.
19. The method of claim 15 , 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 15 , further comprising:
detecting, by the WPTS, a change in utilization of the shared wireless medium environment under which the corresponding channel 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 at least one frequency within a radio band defined for the channel.