US 11,658,859 B2
Methods, systems and devices for wireless communications based on OFDMA digital modulation schemes
Paulo Mendes, Taufkirchen (DE)
Assigned to Airbus Defence and Space GmbH, Taufkirchen (DE)
Filed by AIRBUS DEFENCE AND SPACE GMBH, Taufkirchen (DE)
Filed on Jan. 28, 2021, as Appl. No. 17/160,660.
Claims priority of application No. 10 2020 200 973.2 (DE), filed on Jan. 28, 2020.
Prior Publication US 2021/0234745 A1, Jul. 29, 2021
Int. Cl. H04L 27/26 (2006.01); H04L 5/00 (2006.01); H04W 72/04 (2009.01); H04W 72/0453 (2023.01)
CPC H04L 27/2666 (2013.01) [H04L 5/001 (2013.01); H04W 72/0426 (2013.01); H04W 72/0453 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A wireless network, comprising: a plurality of access points with at least pairwise overlapping wireless coverage, each of the access points comprising:
an orthogonal frequency division multiple access (OFDMA) modulation system; and
at least one channel scheduler coupled to the OFDMA modulation system, the at least one channel scheduler being configured to set up a variable number of virtual wireless interfaces of the access point, each virtual wireless interface being associated with a dedicated set of subcarriers within an OFDMA spectrum,
wherein at least one first interface of the virtual wireless interfaces is configured to host all communication links between the access point and local mobile clients to the access point,
wherein at least one second interface of the virtual wireless interfaces is configured to host communication links between the access point and one of neighboring access points;
wherein a first of the plurality of access points is configured to send a resource usage signal identifying a first dedicated set of subcarriers within the OFDMA spectrum to a number of the neighboring access points in the plurality of access points that have overlapping wireless coverage with the first of the plurality of access points;
wherein the at least one channel scheduler of a second access point in the number of neighboring access points is configured to wait for an arbitrary amount of time within a resource allocation guard period range from reception of the resource usage signal until setting up the variable number of virtual wireless interfaces of the second access point;
wherein the second access point in the number of neighboring access points is configured to receive a further resource usage signal from a third access point of the plurality of access points while waiting, the further resource usage signal indicating a third dedicated set of subcarriers within the OFDMA spectrum; and
wherein the at least one channel scheduler of the second access point in the number of neighboring access points is configured to set up the variable number of virtual wireless interfaces of the second access point such that none of the virtual wireless interfaces of the second access point is included in the first dedicated set of subcarriers or the third dedicated set of subcarriers.