Systems and methods for wireless communication in frequency-limited, client-dense environments
A system for managing the wireless transmission of data using a configured or fixed frequency, such as the 60 GHz spectrum, within a client-dense environment such as an aircraft. The system includes access points (“ZAPs”) that control a plurality of antennas according to a time-slotted broadcast schedule such that the transmissions from the antennas do not interfere with each other.
1. A system for wireless communication within a vehicle interior, comprising:
a wireless access point (“ZAP”) connected to a plurality of distinct and separate antennas including first, second, and third antennas arranged in different locations within a vehicle interior such that the first and second antennas, the second and third antennas, and the first and third antennas, are separated from one another by two or more meters, and wherein the first antenna is adjacent to the second antenna, and the second antenna is adjacent to the third antenna, and the first and third antennas are non-adjacent;
wherein the wireless access point is programmed to cause the non-adjacent first and third antennas to transmit to a first plurality of client devices and a third plurality of client devices, respectively, according to a first time slot within a transmission cycle based on a location of the first and third antennas relative to the second antenna of the plurality of antennas;
wherein the wireless access point is further programmed to cause the second antenna to transmit to a second plurality of client devices according to a second time slot within the transmission cycle based on a location of the second antenna relative to the first and second antennas of the plurality of antennas, wherein the first and second time slots do not overlap;
wherein each of the first plurality of client devices includes a client antenna, and wherein each of the first plurality of client devices is associated with a primary antenna and a secondary antenna of the plurality of antennas based on locations of each of the devices and the antennas; and
wherein the wireless access point is further configured to synchronously control each of the plurality of antennas including assigning a time slot associated with each antenna based on the location of the antenna relative to adjacent antennas of the plurality of antennas.
2. The system of claim 1 , wherein the wireless access point is further configured to assign the first time slot to the first and third antennas by first determining whether a range of transmission for the first and third antennas overlaps a range of transmission of the second antenna or any of the other antennas of the plurality of antennas, and assigning a time slot for the first and third antennas that is different than any of the antennas for which there is an overlap.
3. The system of claim 2 , wherein the wireless access point is further programmed to:
determine that a transmission range of the second antenna does not overlap with the transmission range of the first and third antennas; and
assign the second time slot to the second antenna such that the second antenna transmits to a second plurality of client devices during the second time slot and not the first time slot.
4. The system of claim 1 , wherein the wireless access point is further programmed to:
receive a predetermined layout of the anticipated location of each of the client devices relative to each antenna of the plurality of antennas;
detect a signal transmitted by each of the client devices; and
determine the relative location of each of the client devices relative to each antenna of the plurality of antennas based on the anticipated location and the signal.
5. The system of claim 1 , wherein the antennas and the client antennas are configured to communicate using a fixed frequency band.
6. The system of claim 5 , wherein the frequency band comprises the 61.56 to 62.9 GHz ISM band.
7. The system of claim 1 , further comprising:
a first client device from the first plurality of client devices, the first client device programmed to:
receive a data transmission from the first antenna;
determine that the data transmission has been interrupted;
determine that the first client device is within a second broadcast range from the second antenna from the plurality of antennas; and
transmit an antenna change request to the second antenna, the antenna change request indicating that the first client device wishes to switch to the second antenna; and
the wireless access point further programmed to:
receive the antenna change request; and
in response to the antenna change request, resume the data transmission to the first client device via the second antenna.
8. The system of claim 1 , wherein the wireless access point is further configured to locate each of the client devices using one or more of the plurality of antennas.
9. The system of claim 1 , wherein the wireless access point is further configured to utilize time division multiplexing to cause each of the plurality of antennas to transmit according to an assigned time slot, and wherein the wireless access point is configured to assign each of the plurality of antennas one of the time slots based on the location of the antenna relative to the other antennas, such that adjacent antennas are assigned different time slots.