Abstract: Some embodiments of this disclosure include apparatuses and methods for accessing a communication frequency channel by a first communication system during a first time interval, and accessing the communication frequency channel by a second communication system during a second time interval adjacent to the first time interval. The first communication system communicates using cellular communication techniques, and the second communication system communicates using IEEE 802.11 based communication techniques.

Abstract: Disclosed is a method to secure supply chain data in a blockchain that includes retrieving a unique identification code from a tag of a product and generating digital statuses of the product in the supply chain; creating a transaction record comprising a payload field storing the unique identification code and the digital statuses; generating a hash of the transaction records and then encrypting the hash with a secured key; and sending the transaction record to a node in a blockchain network, in which the node has the transaction record verified and mine into a block for storing on a distributed ledger, thereby ensuring the transaction record tamper-resistance.

Abstract: Disclosed is a method of transmitting data over a plurality of wireless frequency bands between a transmitter and a receiver during one of a plurality of rounds, the method comprising: computing a target spacing in time between a start time of transmission in a first band and a start time of transmission in a second band dependent on a first data rate in the one round and in the first band; commencing transmitting, by the transmitter, a first frame of data over the first band at the first data rate; waiting for the computed target spacing to elapse, and then commencing transmitting, by the transmitter, a second frame of data over the second hand at a second data rate.

Abstract: Disclosed is a method of transmitting data over a plurality of wireless frequency bands between a transmitter and a receiver during one of a plurality of rounds, the method comprising: computing a target spacing in time between a start time of transmission in a first band and a start time of transmission in a second band dependent on a first data rate in the one round and in the first band; commencing transmitting, by the transmitter, a first frame of data over the first band at the first data rate; waiting for the computed target spacing to elapse, and then commencing transmitting, by the transmitter, a second frame of data over the second hand at a second data rate.