US 11,751,219 B2
Radio frequency allocation among wireless user equipment and integrated access and backhaul mobile terminations
David Z. Sun, Broadlands, VA (US); Zheng Fang, McLean, VA (US); Zheng Cai, Fairfax, VA (US); and Yu Wang, Fairfax, VA (US)
Assigned to T-MOBILE INNOVATIONS LLC, Overland Park, KS (US)
Filed by T-Mobile Innovations LLC, Overland Park, KS (US)
Filed on Apr. 22, 2021, as Appl. No. 17/237,832.
Prior Publication US 2022/0346089 A1, Oct. 27, 2022
Int. Cl. H04W 72/29 (2023.01); H04B 7/155 (2006.01); H04W 60/06 (2009.01); H04W 72/0453 (2023.01); H04W 88/14 (2009.01)
CPC H04W 72/29 (2023.01) [H04B 7/155 (2013.01); H04W 60/06 (2013.01); H04W 72/0453 (2013.01); H04W 88/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of operating a wireless access node that serves wireless User Equipment (UEs) and wireless Integrated Access and Backhaul Mobile Terminations (IAB MTs), the method comprising:
a radio wirelessly exchanging first access communications with the wireless UEs over a frequency channel and wirelessly receiving a first IAB request from a first one of the wireless IAB MTs;
in an IAB donor Centralized Unit (CU), an F1AP detecting the first wireless IAB MT and in response, allocating the frequency channel into a UE subchannel and an MT subchannel responsive to the first IAB request, and indicating the UE subchannel and the MT subchannel to another FLAP in an IAB donor Distributed Unit (DU);
in the IAB donor DU, the other F1AP receiving the indication of the UE subchannel and the MT subchannel, and in response, directing a Media Access Control (MAC) in the IAB donor DU to use the UE subchannel for the wireless UEs and to use the MT subchannel for the first IAB MT;
in response to MAC signaling, the radio wirelessly exchanging second access communications with the wireless UEs over the UE subchannel, wirelessly exchanging first backhaul communications with the first wireless IAB MT over the MT subchannel, and wirelessly receiving a second IAB request from a second one of the wireless IAB MTs;
the F1AP detecting the second wireless IAB MT and in response, reallocating the frequency channel into a new UE subchannel, a first MT subchannel, and a second MT subchannel responsive to the second IAB request, and indicating the new UE subchannel, the first MT subchannel, and the second MT subchannel to the other F1AP;
the other F1AP receiving the indication of the new UE subchannel, the first MT subchannel, and the second MT subchannel, and in response, directing the MAC to use the new UE subchannel for the wireless UEs, to use the first MT subchannel for the first IAB MT, and to use the second MT subchannel for the second IAB MT; and
in response to additional MAC signaling, the radio wirelessly exchanging third access communications with the wireless UEs over the new UE subchannel, wirelessly exchanging second backhaul communications with the first wireless IAB MT over the first MT subchannel, and wirelessly exchanging third backhaul communications with the second wireless IAB MT over the second MT subchannel.