Examples of a system and method for adaptively tuning a radio frequency (RF) front-end are generally described herein. In some examples, the frequency of a transmit signal of RF front-end circuitry is swept in at least a part of the RF transmit band. RF power in a receiver is detected as a function of the RF frequency of the transmit signal to determine a location of at least one tunable notch or other band stop element in the frequency domain. Information from the detected RF power is determined as a function of the RF frequency of the transmit signal. The RF front-end circuitry is adjusted to a selected frequency response using the determined information.

A method for disconnecting a wireless time-division duplex communication link, said time-division duplex communication link being between a first node transmitting during time slots allocated to said first node and a second node transmitting during separate time slots allocated to said second node, said first node transmitting at a respective one of a plurality of frequency bands during each of said time slots allocated to said first node, said method may include sub-dividing a time slot allocated to said first node into consecutive time intervals; and disrupting communication between said first node and said second node by transmitting, using a transmitter, respective interference signals during at least some of said time intervals of the time slot to provide an aggregated disconnect signal of the time slot, each of said interference signals being transmitted on one of said plurality of frequency bands, wherein for at least two of said time intervals said interference signals are transmitted on different frequency bands.

The invention refers to wireless safety systems and it relates to a method for transmitting data by a sensor of a wireless safety system that enables to transmit massive data to large distances (up to 2000 m). A method for transmitting data by a sensor of a wireless safety system that comprises at least one sensor and a receiver, which are coupled by means of a radio communication, is proposed. The method comprises: continuously exchanging data and/or data announcements, which are transmitted, by sending statuses and/or alarm signals through a main radio channel between the sensor and the receiver that is equipped with at least two radio modules, which are configured to perform the continuous data exchange, and activating a separate data channel for the data transmission using one of the radio modules that is not used for the main radio channel, and with a decision making unit. Wherein the sensor, through said main radio channel by means of the alarm signal (“Data Pending”), sends a request regarding a necessary data transmission through the separate data channel to the receiver, by means of the decision making unit, the receiver sends the corresponding signals to the sensor. After the signal regarding the beginning of the data transmission is received, the sensor begins to transmit the data through the data channel with a continuous series of the data packets. At the end of the data transmission the receiver sends the request with a control number of packets to confirm a completeness of the data transmission. After the control number of the packets and the fact that the data has been completely transmitted from the sensor are confirmed, the data channel is emptied for a next session of the data transmission, and the sensor, after the data transmission session is completed, switches to operation through the main radio channel. Also, a wireless safety system for implementation of the described method is proposed.

A method and system for dynamically reconfiguring an air interface that defines a continuum of frames each divided into a sequence of transmission time intervals (TTIs). The air interface is initially configured according to a first radio access technology (RAT). The base station then detects that at least a threshold extent of wireless client devices (WCDs) served by the base station on the air interface support operation according to a second RAT. And in response, the base station reconfigures the air interface so that certain TTIs per frame instead operate on a second RAT, with the remaining TTIs per frame still operating on the first RAT. The base station then serves WCDs that support the second RAT in the TTIs now configured according to the second RAT, while continuing to serve other WCDs according to the first RAT in the remaining TTIs configured according to the first RAT.

A server device can effectively apply a network coexistence service to a mobile body whose location can change every moment. The server device includes a control unit configured to provide a plurality of lists in which an available frequency and transmission power of the frequency are described for each predetermined range determined on a basis of a predetermined criterion so that the frequency is not set in an overlapped manner in the same predetermined range, to an external device which uses the frequency.

A base station receiver is described. The base station receiver may comprise at least one processor and memory. The memory may store instructions executable by the at least one processor. The instructions may include, to: receive, via a time-division multiple access (TDMA) scheme, a first carrier frequency comprising a first burst; receive, via the TDMA scheme, a second carrier frequency comprising a second burst; and demodulate and decode both the first and second bursts using a common demodulating and decoding node (DDN).

Portable communications device and method for full duplex operation in a time division multiple access radio system. The method includes providing a switch for connecting one of a first voltage controlled oscillator and a second voltage controlled oscillator to a synthesizer. The synthesizer generates a first frequency when connected to the first voltage controlled oscillator and generates a second frequency when connected to the second voltage controlled oscillator. The method also includes controlling, using an electronic processor coupled to the switch, the switch to connect the first voltage controlled oscillator to the synthesizer for a first timeslot, and controlling, using the electronic processor, the switch to disconnect the first voltage controlled oscillator from the synthesizer and connect the second voltage controlled oscillator to the synthesizer for a second timeslot. The second timeslot is immediately adjacent to the first timeslot.

A computer readable storage medium is presented, having computer readable program instructions thereon for causing a processor to carry out the steps of: sub-dividing a time slot into consecutive time intervals, the time slot belongs to multiple time slots allocated to a first node for transmitting to a second node using a wireless time-division duplex communication link between the first node and the second node, the second node transmitting during separate time slots allocated to said second node; and disrupting communication between said first node and said second node by transmitting, using a transmitter, respective interference signals during at least some of said time intervals, each of said interference signals being transmitted on one of said frequency bands, wherein for at least two of said time intervals said interference signals are transmitted on different frequency band.

A computer readable storage medium is presented, having computer readable program instructions thereon for causing a processor to carry out the steps of: sub-dividing a time slot into consecutive time intervals, the time slot belongs to multiple time slots allocated to a first node for transmitting to a second node using a wireless time-division duplex communication link between the first node and the second node, the second node transmitting during separate time slots allocated to said second node; and disrupting communication between said first node and said second node by transmitting, using a transmitter, respective interference signals during at least some of said time intervals, each of said interference signals being transmitted on one of said frequency bands, wherein for at least two of said time intervals said interference signals are transmitted on different frequency band.

Techniques are provided for diminishing adjacent channel interference between radios using shared frequency spectrum. A guard band may be inserted between a pair of adjacent frequency spectrums so that they are no longer adjacent.