US 11,743,845 B2
Radio communication system, radio device, and computer program product
Suh Wuk Kim, Ota Tokyo (JP); and Yu Yu, Kawasaki Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Feb. 24, 2021, as Appl. No. 17/184,425.
Claims priority of application No. 2020-153344 (JP), filed on Sep. 11, 2020.
Prior Publication US 2022/0086779 A1, Mar. 17, 2022
Int. Cl. H04W 56/00 (2009.01); H04W 72/0446 (2023.01); H04L 45/122 (2022.01)
CPC H04W 56/0005 (2013.01) [H04L 45/122 (2013.01); H04W 72/0446 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A radio communication system comprising a plurality of radio devices constituting a multi-hop network, wherein
each of the radio devices is configured to:
comprise a hardware processor configured to perform management by synchronizing a timing of a frame including a predetermined number of slots corresponding to a predetermined time length,
be exclusively associated with at least one of the slots included in the frame,
enable data to be transmitted in the slot associated with an own radio device in the frame,
perform management by synchronizing a timing of an uplink period including predetermined X frames and a timing of a downlink period including predetermined Y frames, X being an integer of 2 or larger and Y being an integer of 2 or larger, X and Y being different values,
allocate a hop count of each radio device of the plurality of radio devices to at least one of the frames in the uplink period and at least one of the frames in the downlink period according to a predetermined rule, the hop count indicating a number of radio devices that transmit data on a shortest path for transmitting the data from the radio device serving as a target to the radio device disposed at a root position,
in the frame to which the hop count of the own radio device included in the uplink period is allocated, transmit uplink data in the multi-hop network, and
in the frame to which the hop count of the own radio device included in the downlink period is allocated, transmit downlink data in the multi-hop network,
wherein
the hop count allocated to a first frame of the X frames included in a first uplink period as an arbitrary uplink period is made to be same as the hop count allocated to a frame included in the downlink period whose timing is same as a timing of the first frame,
the hop count allocated to a second frame of the X frames included in a second uplink period as an arbitrary uplink period differing from the first uplink period is made to be same as the hop count allocated to a frame included in the downlink period whose timing is same as a timing of the second frame, and
the hop count allocated to the first frame and the hop count allocated to the second frame are made to have different values.