Systems and methods of measuring reference signals in a multefire scenario are described. A UE receives control information anchor channel dependent on whether the UE is in an adaptive frequency hopping system (FHS) and whether the FHS is a LBT FHS. The reference signals are received on an unlicensed band via the anchor and/or a non-anchor channel and measured for RRM and/or in-sync or out-of-sync measurements. RRM measurements are transmitted to the eNB for mobility management and otherwise the validity of an in- or out-of-sync indication is determined and a counter started when valid. The control information has a subframe configuration and resource allocation, which is used for SRS transmission on the non-anchor channel. Uplink scheduling information is received on the anchor channel for data transmission on the non-anchor channel based on the SRS.

A wireless communication apparatus includes a channel estimation circuit, a beamforming control circuit, and a transmit (TX) circuit. The channel estimation circuit estimates a channel between the wireless communication apparatus and another wireless communication apparatus during at least one first time slot. The beamforming control circuit determines beamforming coefficients according to the estimated channel. The TX circuit applies the beamforming coefficients to transmission of an output data during at least one second time slot later than the at least one first time slot. During the at least one second time slot, the output data is transmitted to another wireless communication apparatus via multiple antennae. The wireless communication apparatus performs communications according to a normal frequency hopping sequence in compliance with a communication specification.

A novel and useful acknowledgement and adaptive frequency hopping mechanism for use in wireless communication systems such as IO-Link Wireless. One or two additional acknowledgement bits are added to packet transmissions. One is a current acknowledgment bit which indicates whether a packet was successfully received anytime during the current cycle. The second bit is a previous acknowledgment bit which indicates whether packets were received successfully anytime during the previous cycle. An adaptive hopping table is constructed using a greedy algorithm which chooses frequencies with the best PER for transmission of higher priority packets, while equalizing the PER products across cycles. A last resort frequency mechanism further improves transmission success by switching to a better performing channel for the last subcycle when previous attempts to transmit a high priority packet have failed.

A device, system and method for frequency hopping control is provided. The device comprises: a communication unit configured to communicate via main radio channels and a control channel; and a controller interconnected with the communication unit. The controller is configured to: receive, via the communication unit communicating over the control channel, a frequency hopping control command comprising a list of one or more hopping frequencies for frequency hopping; and in response to receiving the frequency hopping control command, control the communication unit to communicate via the main radio channels using frequency hopping according to the one or more hopping frequencies.

Methods, systems, and devices for wireless communication are described. A wireless device may perform a listen before talk (LBT) procedure on a channel bandwidth using an energy detection (ED) threshold. The ED threshold being associated with a transmission bandwidth that is narrower than the channel bandwidth. The wireless device may also, responsive to a successful LBT procedure, transmit on the transmission bandwidth according to a frequency hopping pattern during a first channel occupancy time (COT). The frequency hopping pattern comprises a first resource allocation and a second resource allocation different from the first resource allocation.

Methods and apparatuses for carrier selection are described. In one example, a method of carrier selection for a frequency-hopping wireless communication device includes using a fixed set of available carriers to hop over during communications. The method includes allocating a subset of the available carriers to a long-range carrier class. In one example, the subset of available carriers consists of at least two carrier clusters spaced widely in the frequency spectrum. The method further includes monitoring a transmit power level in the wireless communication device. The method further includes using the long-range carrier class to hop over during communications if the wireless communication device transmit power is greater than a predetermined level.

Methods, apparatus, and processor-readable storage media for generating a frequency hopping arrangement are provided herein. An example computer-implemented method includes determining a starting frequency channel for a frequency hopping arrangement to be used in a communication session by a designated group of devices; calculating a frequency channel step value based at least in part on a predetermined required minimum number of frequency channels and the number of devices in the designated group; and selecting the frequency channel values to be used in the communication session by iterating through frequency channel values for the useable frequency channels at intervals of a random frequency channel selection offset value until a number of frequency channel values equal to the frequency channel step value are selected.

Methods and apparatuses for carrier selection are described. In one example, a method of carrier selection for a frequency-hopping wireless communication device includes using a fixed set of available carriers to hop over during communications. The method includes allocating a subset of the available carriers to a long-range carrier class. In one example, the subset of available carriers consists of at least two carrier clusters spaced widely in the frequency spectrum. The method further includes monitoring a transmit power level in the wireless communication device. The method further includes using the long-range carrier class to hop over during communications if the wireless communication device transmit power is greater than a predetermined level.

Methods, apparatus, and processor-readable storage media for pairing multiple devices into a designated group for a communication session are provided herein. An example computer-implemented method includes processing, via a first processing device, information input by a user in connection with a request to pair the first processing device to one or more additional processing devices, wherein the information comprises a number of additional processing devices to which the first processing device is attempting to pair; implementing, via the first processing device, a pairing algorithm which comprises searching for additional processing devices, in accordance with temporal values associated with the input of the first processing device, that carried out a request to pair to the same number of additional processing devices as the first processing device; and configuring the first processing device to a pairing mode configuration upon successful completion of the pairing algorithm.

A communication system may include a radio frequency (RF) detector and an RF transmitter having a selectable hopping rate and a selectable hopping frequency window. A controller may be configured to operate the RF transmitter at a selected hopping rate and at a selected hopping frequency window based upon the RF detector.