Abstract: A method for communication includes accepting a request from a transmitter to transmit data to a receiver in a multiple-access communication system that uses multiple subcarriers. A maximum number of the subcarriers on which the transmitter may transmit the data simultaneously without violating a predetermined signal power criterion is calculated. The transmitter is allocated a time-frequency allocation containing the maximum number of the subcarriers. The data is transmitted from the transmitter to the receiver using the allocated time-frequency allocation.

Abstract: Apparatus for communication includes at least one RF receiver circuit, which is coupled to receive and downconvert first and second RF signals that are transmitted respectively over different, first and second wireless networks in accordance with different, first and second network protocols, so as to output first and second downconverted signals. A baseband processing circuit includes processing components that are coupled to receive and process the first and second downconverted signals so as to extract first and second data from the signals. The processing components have a first configuration for demodulating the first downconverted signals in accordance with the first network protocol and a second configuration for demodulating the second downconverted signals in accordance with the second network protocol.

Abstract: A method for communication includes establishing a first connection between a wireless terminal and a base station of a long-range wireless data network, which operates in accordance with a first protocol that defines a sequence of time frames for transmission of data between the wireless terminal and the base station. A signal is sent from the wireless terminal to the base station identifying an interval including one or more of the time frames during which the wireless terminal will not receive data from the base station. During the interval, a second connection is established between the wireless terminal and an access point of a wireless local area network (WLAN) in accordance with a second protocol, different from the first protocol.

Abstract: A wireless communication terminal includes a radio frequency (RF) transceiver and a baseband processing circuit, which is arranged to detect an indication of a rate of movement of the terminal. The baseband processing circuit is coupled to cause the RF transceiver to scan periodically for access points that are available to communicate with the mobile terminal at a scan rate that is selected responsively to the indication, and upon detecting an available access point, to establish a wireless connection between the terminal and the available access point.