Abstract: The present disclosure relates to a communication technique for convergence of a 5G communication system for supporting a higher data transmission rate beyond a 4G system with an IoT technology, and a system therefor. The present disclosure can be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, health care, digital education, retail business, security and safety-related service, etc.) on the basis of a 5G communication technology and an IoT-related technology.

Abstract: In some examples, an electronic device includes a plurality of network interfaces to communicate over respective different networks, and a storage medium to store information associating a first application of the electronic device with a first profile, and associating a second application of the electronic device with a second profile. The first profile selects a first network interface of the plurality of network interfaces to use for communications, and the second profile selects a second network interface of the plurality of network interfaces to use for communications.

Abstract: A method of improving antenna performance and an electronic device configured to improve the antenna performance are provided. The electronic device include: a housing; an antenna located inside the housing or formed as part of the housing; a radio frequency (RF) interface configured to transmit/receive wireless signals via the antenna; a groove formed inside an opening in part of the housing; an electrical connector placed inside the groove; a ground member placed inside the housing; a processor electrically connected to the RF interface and the electrical connector; and a memory electrically connected to the processor. The memory stores instructions which enable the processor to detect an external electrical connector inserted into the electrical connector, and select at least one of a plurality of electrical paths between the RF interface and the ground member, in response to at least part of the inserted external electrical connector. Various embodiments are provided.

Abstract: A system and method to control communication in a vehicle include receiving an input. A controller determines whether to transmit a message using a high frequency (HF) communication system based on the input. The frequency range used by the HF communication system is lower than a frequency range used by the cellular communication system. The method includes controlling transmission by the HF communication system based on determining to transmit the message using the HF communication system.

Abstract: An information processing apparatus including a touch panel and a near field communication interface. The information processing apparatus detects that an input received at the touch panel corresponds to a predetermined input when the information processing apparatus is in a suspended state; and controls the information processing apparatus execute a predetermined function via the near field communication interface and awake from the suspended state upon detecting that the input corresponds to the predetermined input.

Abstract: A method for network selection on a user equipment (UE) device and the UE device are shown. The user equipment device registers on a first network in a wide area cellular network (WACN) band and receives, from a wireless local area network (WLAN), a list of WACNs that support generic access network (GAN) capabilities. The user equipment device selects the WLAN if the first network is on the list.

Abstract: An embodiment of the present invention discloses a base station, including: a baseband unit, a radio remote unit, a power supply device, a signal transmission device, and a backup power supply device. The baseband unit and the radio remote unit are mounted on an antenna tower or a pole. At least one of the power supply device, the signal transmission device, or the backup power supply device is also mounted on the antenna tower or the pole.

Abstract: A sequencer for use with an Electronic Warfare system consisting of one or more transmitters and receivers including one or more desired operations; a processor in communication with a memory; the memory storing instructions executed by the processor to sequence the one or more desired operations; an output connected to each of transmitter and receiver devices of the transceiver to control power-up and power-down sequences of the transmitter and receiver devices; wherein the instructions to sequence the one or more operations include instructions to prioritize a high-priority transmit operation such that the high-priority transmit operation is carried out in real-time upon request.

Abstract: The disclosed embodiments provide a system that facilitates wireless network access. The system includes a trusted network access and tunneling service (TNATS) associated with a ubiquitous static service set identifier (SSID). The system also includes a proximate wireless access point (WAP). During operation, the system enables the TNATS on the proximate WAP, which then broadcasts the ubiquitous static SSID. Next, the proximate WAP receives a request from a guest device to access the TNATS through the proximate WAP. The proximate WAP then initiates an authentication process with the TNATS for a user of the guest device. If the authentication succeeds, the proximate WAP allows the guest device to access a network through the proximate WAP.

Abstract: A method and apparatus for establishing a session in a wireless communication system is provided. According to the present invention, a session of a 3rd generation partnership project (3GPP) long-term evolution (LTE) system or a session of a Wi-Fi system can be established for user plane (U-plane) switch in a converged system of the 3GPP LTE system and the Wi-Fi system. After performing U-plane switch, an entity of the LTE system may suspend (deactivate) and release radio bearers mapped to all of evolved packet system (EPS) bearer related to U-plane.

Abstract: A wireless charging system for a variable charging mode includes: an information receiver configured to receive information about a wireless power receiver including a wireless charging mode that is supported by the wireless power receiver through a wireless communication connected to the wireless power receiver; wireless power transmitting units configured to wirelessly transmit power by a plurality of different wireless charging modes; and a controller configured to control the wireless power transmitting units to wireless transmit power by the wireless charging mode corresponding to the received information.

Abstract: A device is provided, comprising at least one processor and at least one computer-readable storage medium having encoded thereon executable instructions that, when executed, cause the at least one processor to: monitor a user's usage of the device; in response to determining that an amount of time the user has been using the device has reached a selected limit for usage time, activate a home screen application to restrict the user's access to the device, wherein the home screen application is programmed to prompt the user to demonstrate at least one achievement; and in response to determining that the user successfully demonstrated at least one achievement, allow the user to regain access to the device.

Abstract: This specification discloses an excellent communication device of a field coupling type that increases field coupling efficiency between electrodes and realizes a small-sized device. This specification also discloses a communication system and an electrode. A communication device 100 includes: a first resonant circuit 121 connected in series to an electrode unit 110 formed with two conductor plates; and a second resonant circuit 122 connected in parallel to the electrode unit 110 and the first resonant circuit 121, which are connected in series. The constant of a resonant circuit is determined so that the voltage V2 to be applied to the electrode unit 110 becomes higher than the voltage V1 to be applied to the electrode unit 110 and the first resonant circuit 121 connected in series. In this manner, a field coupling electrode that has a very high coupling strength at a target frequency is obtained.

Abstract: A wireless communication apparatus includes an acquisition unit, a calculation unit, a selection unit, and a notification unit. The acquisition unit acquires location information of a first terminal and a second terminal that perform terminal-to-terminal communication without using a base station. The calculation unit calculates a distance between the first and second terminals based on the acquired location information of the first and second terminals. The selection unit selects a frequency to be used for the terminal-to-terminal communication based on the distance calculated by the calculation unit. The notification unit notifies the first and second terminals of a start of the terminal-to-terminal communication and the selected frequency.

Abstract: A method that reduces power consumption in a wireless communication device having a first and a second modem. The method includes detecting access to a communication network via the second modem, and in response to that detection: establishing a communication channel between the second modem and a communication service over a communication network; and triggering the first modem to enter a sleep state. The communication service is configured to respond to receipt at the communication service of an incoming communication to be routed to the first modem via a first communication network by: (i) automatically transmitting a notification via the communication channel to the second modem and (ii) forwarding the incoming communication via the first communication network to the first modem. The method then includes, in response to receipt of the notification at the device: awakening the first modem to an active state to enable receipt of the incoming communication.

Abstract: Aspects of adjusting application parameters for interference mitigation are disclosed. In one aspect, a computing device is provided that employs a control system configured to detect and mitigate electromagnetic interference (EMI) generated within the computing device. More specifically, the control system is configured to detect possible EMI conditions and adjust parameters within the computing device to mitigate such EMI. In this manner, the computing device includes an aggressor application and a victim receiver. The control system is configured to analyze performance tradeoffs based on an acceptable performance level of the aggressor application and the performance degradation experienced by the victim receiver. Based on such analysis, the control system is configured to adjust parameters associated with the aggressor application to mitigate the EMI.

Abstract: In one example embodiment, a device includes a memory configured to store computer-readable instructions therein and a processor. The processor is configured to execute the computer-readable instructions to receive a mixture signal, and determine a first signal and a second signal from the mixture signal, the first signal being a signal of a first technology and the second signal being a signal of a second technology, the first and second signals being overlappingly transmitted signals, at least one of the first signal and the second signal being used for processing of information associated with the at least one of the first signal and the second signal.

Abstract: An RFID device provided at a transmission and reception circuit processes an RFID carrier signal belonging to a band of about 902 MHz to about 928 MHz or about 865 MHz to about 868 MHz to execute near field radio communication. An RFIC provided at a transmission and reception circuit processes a GSM carrier signal belonging to a band of about 824 MHz to about 894 MHz or about 880 MHz to about 960 MHz to execute mobile communication. A filter circuit provided at the transmission and reception circuit takes the band of about 850 MHz to about 940 MHz where RFID carrier signals appear as the pass band, and takes the band greater than or equal to about 1.2 GHz where a harmonic wave component of GSM carrier signals appears as the attenuation band.

Abstract: The present disclosure relates to envelope power supply calibration of a multi-mode RF power amplifier (PA) to ensure adequate headroom when operating using one of multiple communications modes. The communications modes may include multiple modulation modes, a half-duplex mode, a full-duplex mode, or any combination thereof. As such, each communications mode may have specific peak-to-average power and linearity requirements for the multi-mode RF PA. As a result, each communications mode may have corresponding envelope power supply headroom requirements. The calibration may include determining a saturation operating constraint based on calibration data obtained during saturated operation of the multi-mode RF PA. During operation of the multi-mode RF PA, the envelope power supply may be restricted to provide a minimum allowable magnitude based on an RF signal level of the multi-mode RF PA, the communications mode, and the saturation operating constraint to provide adequate headroom.

Abstract: A method, device and computer program product is provided for sending a data signal and a clock signal between a radio frequency circuit of a device and a baseband circuit of the device, the radio frequency circuit being configured for at least one of transmission and reception of radio signals in a radio frequency band, where the clock signal has a clock frequency Fc. The method comprises selecting the clock frequency Fc to be a rational multiple of the 0.270833 MHz symbol rate of the Global System for Mobile Communications (GSM) standard and a rational multiple of the 3.84 MHz chipping rate of the Wideband Code Division Multiple Access (WCDMA) interface. The clock frequency Fc is selected such that the clock signal can be generated using a 38.4 MHz or 19.2 MHz reference clock signal, a non-fractional Phase Locked Loop clock multiplier and an output divider, without first having to divide down the reference clock signal.

Abstract: The present disclosure relates to envelope power supply calibration of a multi-mode RF power amplifier (PA) to ensure adequate headroom when operating using one of multiple communications modes. The communications modes may include multiple modulation modes, a half-duplex mode, a full-duplex mode, or any combination thereof. As such, each communications mode may have specific peak-to-average power and linearity requirements for the multi-mode RF PA. As a result, each communications mode may have corresponding envelope power supply headroom requirements. The calibration may include determining a saturation operating constraint based on calibration data obtained during saturated operation of the multi-mode RF PA. During operation of the multi-mode RF PA, the envelope power supply may be restricted to provide a minimum allowable magnitude based on an RF signal level of the multi-mode RF PA, the communications mode, and the saturation operating constraint to provide adequate headroom.

Abstract: In one embodiment, an apparatus includes a first block configured to decompose an input signal into a positive component and a negative component. The apparatus further includes a second block configured to generate a mixer positive driver component from the positive component and a mixer negative driver component from the negative component and input the mixer positive driver component and the negative driver component into a mixer for a wireless transmitter.

Abstract: Disclosed is a Bluetooth Communication System and related method thereof for switching mode of operations between electronic devices. The system comprising a first Bluetooth enabled electronic device, one or more second Bluetooth enabled electronic devices, wherein the first Bluetooth enabled electronic device comprising a Bluetooth chip, a processing circuitry, and a user operable interface configured thereon to switch the processing circuitry to a desired second Bluetooth enabled electronic devices, and switch operational mode of the desired second Bluetooth enabled electronic devices from a first mode of operation to a second mode of operation or vice versa to establish a Bluetooth communication link between the first Bluetooth enabled electronic device and desired second Bluetooth enabled electronic device.

Abstract: A transmitter includes a power amplifier driver connected with a first transformer and a second transformer. The first transformer is configured for a first band mode and the second transformer is configured for a second band mode. The power amplifier driver drives both the first transformer and the second transformer.

Abstract: The present disclosure is generally directed to a portable docking station having a frame, a handle and a counterweight, that receives a portable electronic device. The portable docking station may include one or more physical features that enable the portable docking station to be held in the hand or hands of a user, and for the portable electronic device to be used while docked.

Abstract: A method and apparatus can cut back power in a simultaneous dual frequency band call. The method may operate a dual frequency band transmit device. The method may include determining if a transmit frequency in a first frequency band from the device combined with a transmit frequency in a second frequency band from the device causes receiver desensitization at the device. The method may include determining if the transmit power in the first frequency band is above a threshold power. The method may include reducing maximum transmit power in the second frequency band by an amount proportional to transmit power in the first frequency band and transmit signal bandwidth in the second frequency band in only the portion of the second frequency band where a resultant frequency component can cause desensitization.

Abstract: Circuitry, which includes multi-mode multi-band radio frequency (RF) power amplification circuitry, power amplifier (PA) control circuitry, and a PA-digital communications interface (DCI) is disclosed according to one embodiment of the circuitry. The PA control circuitry is coupled between the amplification circuitry and the PA-DCI, which is coupled to a digital communications bus, and configures the amplification circuitry. The amplification circuitry includes at least a first RF input and multiple RF outputs, such that at least some of the RF outputs are associated with multiple communications modes and at least some of the RF outputs are associated with multiple frequency bands. Configuration of the amplification circuitry associates one RF input with one RF output, and is correlated with configuration information defined by at least a first defined parameter set. The PA control circuitry stores at least a first look-up table (LUT), which provides the configuration information.

Abstract: Techniques and architecture are disclosed for providing an ultra-wideband, multi-channel solid-state power amplifier architecture. In some embodiments, the architecture includes a power divider which splits an input signal and delivers that split signal to a plurality of downstream channel chipsets. Each channel chipset is configured to amplify a sub-band of the original full-band input signal and to provide the resultant amplified sub-band for downstream use, such as for transmission by an antenna operatively coupled with that channel. In the aggregate, the amplified sub-bands provide coverage of the same ultra-wideband frequency range of the original input signal, in some cases. In some embodiments, the architecture provides high radio frequency (RF) power with good amplifying efficiency and ultra-wide instantaneous frequency bandwidth performance in a small-form-factor package.

Abstract: A multi-mode multi-band power amplifier (PA) module is described. In an exemplary design, the PA module includes multiple power amplifiers, multiple matching circuits, and a set of switches. Each power amplifier provides power amplification for its input signal when selected. Each matching circuit provides impedance matching and filtering for its power amplifier and provides a respective output signal. The switches configure the power amplifiers to support multiple modes, with each mode being for a particular radio technology. Each power amplifier supports at least two modes. The PA module may further include a driver amplifier and an additional matching circuit. The driver amplifier amplifies an input signal and provides an amplified signal to the power amplifiers. The additional matching circuit combines the outputs of other matching circuits and provides an output signal with higher output power. The driver amplifier and the power amplifiers can support multiple output power levels.

Abstract: The claimed subject matter provides for systems and/or methods for a dynamic range wireless access point to initiate deliberate and/or selective communications with one or more wireless devices over a short range radio path. One embodiment of an access point system comprises a processor that transfers one or more wireless devices to a long range radio path once a transition condition has been met. In another embodiment, an access point system may affect transactions between user/customer's smart devices and a commercial place of business where the access point system and the smart devices initiate communications when the smart devices are deliberately placed within the proximity of the access point antenna and/or the smart devices are brought within the vicinity of the access point antenna such as by passing through the entrance or exit to the place of business.

Abstract: In one embodiment, an amplifier system has a tap, a delay filter, a linearized amplifier, and a hybrid combiner. The tapped portion of an input signal is amplified by the amplifier, the untapped portion of the input signal is delayed by the delay filter, and the combiner combines the resulting amplified, tapped portion and the delayed, untapped portion to generate an amplified output signal. By re-combining the delayed, untapped portion of the input signal with the amplified, tapped portion, the power of the untapped portion is not lost, and the amplifier does not have to compensate for all of the distortion that would otherwise be associated with the total output power level. Such an amplifier system is applicable, for example, in upgrading an existing GSM cell site to support both GSM communications as well as UMTS communications without degrading GSM operations.

Abstract: A communications transmitter includes a baseband processor configured to generate amplitude, angle, in-phase and quadrature baseband signals and a combination modulator that is configurable to modulate in the polar domain and, alternatively, in the quadrature domain. The combination modulator includes a quadrature modulator and a separate and distinct angle modulator that is configured to serve as a local oscillator for the quadrature modulator. In one embodiment of the invention the combination modulator is configured to modulate in the quadrature domain when the transmitter is operating according to a first communications condition (e.g., first transmit power level or first modulation scheme) and is configured to modulate in the polar domain when the transmitter is operating according to a second communications condition (e.g., second transmit power level or second modulation scheme).

Abstract: In one embodiment, a method comprises activating a signaling reduction mode on a wireless access node for a mobile device in an idle state where the signaling reduction mode permits the mobile device to switch radio access technologies while maintaining registration with both the wireless access node and a peer wireless access node, exchanging with the peer wireless access node a first control tunnel identifier of the wireless access node and a second control tunnel identifier of the peer wireless access node, selecting at the wireless access node a second gateway to replace a first gateway, establishing a control connection with the second gateway, transmitting to the second gateway the second control tunnel identifier of the peer wireless access node so that the second gateway may establish a control connection with the peer wireless access node, and continuing the signaling reduction mode.

Abstract: An electronic device may contain wireless circuitry that transmits and receives radio-frequency signals through antenna structures. Power amplifier circuitry may amplify the radio-frequency signals that are being transmitted. An adjustable voltage supply may supply an adjustable power amplifier bias voltage to the power amplifier circuitry. The power amplifier circuitry may include multiple power amplifiers each of which may handle signals transmitted using a different cellular telephone standard. For each cellular telephone standard, multiple modulation schemes may be supported. Some modulation schemes may have greater power amplifier linearity requirements than others. Control circuitry can adjust the adjustable power amplifier bias voltage in real time to select an optimum power amplifier bias voltage based on the current cellular telephone standard, modulation scheme, power amplifier gain state, and operating frequency in use.

Abstract: At least a first shunt switching element and switching control circuitry of a first switching power supply are disclosed. At least the first shunt switching element is coupled between a ground and an output inductance node of the first switching power supply. The first switching power supply provides a buck output signal from the output inductance node. The switching control circuitry selects one of an ON state and an OFF state of the first shunt switching element. When the buck output signal is above a first threshold, the switching control circuitry is inhibited from selecting the ON state. The first switching power supply provides a first switching power supply output signal based on the buck output signal. By using feedback based on the buck output signal, the switching control circuitry may refine the timing of switching between series switching elements and shunt switching elements to increase efficiency.

Abstract: Embodiments provide a radio frequency (RF) power amplifier (PA) circuit having a high-power mode and a low-power mode. The RF PA circuit may include a high-power amplifier to provide an amplified RF signal on a first path, and a low-power amplifier to provide an amplified RF signal on a second path. The first path and second path may intersect at a junction node. A switch may be coupled between the low-power amplifier and the junction node to switch the circuit between the high-power mode and the low-power mode. A matching circuit may be coupled on the second path to match an output impedance of the low-power amplifier to a junction impedance of the junction node at a fundamental frequency of the RF signal, and to present an open circuit at a third harmonic of the RF signal. The matching circuit may facilitate high efficiency for the RF PA circuit.

Abstract: Provided are a reception apparatus and transmission apparatus for supporting a scalable bandwidth in a carrier aggregation environment. The reception apparatus and transmission apparatus can link carrier aggregation technology and scalable bandwidth technology by supporting a scalable bandwidth having different bandwidths in size in a carrier aggregation environment, thereby enhancing compatibility between different wireless communication systems.

Abstract: Embodiments of the present disclosure relate to multi-mode multi-band radio frequency (RF) power amplifier (PA) circuitry, which includes a multi-mode multi-band quadrature RF PA coupled to multi-mode multi-band switching circuitry via a single output. The switching circuitry provides at least one non-linear mode output and multiple linear mode outputs. The non-linear mode output may be associated with at least one non-linear mode RF communications band and each linear mode output may be associated with a corresponding linear mode RF communications band. The outputs from the switching circuitry may be coupled to an antenna port via front-end aggregation circuitry. The quadrature nature of the quadrature PA path may provide tolerance for changes in antenna loading conditions.

Abstract: Embodiments provide systems and methods to optimize the time when to receive transmissions from dissimilar wireless networks, and hence, improve the overall network throughput and avoid access point transmission rate fall-back mechanism having an avalanche effect during coexistence of dissimilar wireless network technologies. A receiver comprises at least two dissimilar network technology subsystems and is able to receive transmissions from dissimilar wireless network technology subsystems during a predetermined reception window.

Abstract: When switching the mode of a power amplifier between compressed mode and uncompressed mode, accurate transmission power control is realized. A transmission power control method includes setting a power setting value of mode to switch to, such that an inter-mode output power error is canceled (equal to step ST21), calculating an intra-mode output power error from the power setting value of the mode to switch to (equal to step ST23), calculating a gain linearity value based on the power setting value of the mode to switch to and an output power error of the intra-mode (equal to step ST24), and resetting the power setting value of the mode to switch to based on the gain linearity value (equal to steps ST25 and 26).

Abstract: A system and method of reducing the WLAN power consumption and limiting battery drain of a mobile communications device is provided. The mechanism continuously monitors for changes in the WLAN and cellular signal strength and modifies the WLAN profile scanning activity accordingly. By monitoring for changes, transitions can be detected which indicate the location of the mobile device (i.e., indoor or outdoor). An increase in cellular signal strength and a decrease in WLAN signal strength indicates the user is transitioning outdoors where WLAN coverage may be limited. To reduce battery power consumption, background scanning is suspended or its frequency significantly lowered. Moving indoors is indicated by a decrease in cellular signal strength and an increase in WLAN signal strength. Background/Connectivity scanning frequency is increased to provide shorter time-to-connect to WLAN Networks for the user within the WLAN coverage area.

Abstract: In one embodiment, an apparatus includes an upconversion unit configured to upconvert a baseband signal to a radio frequency (RF) signal. A plurality of baluns for a plurality of wireless bands are provided. Multiplexing circuitry is coupled to the plurality of baluns where the upconversion unit is coupled to each balun through the multiplexing circuitry. The multiplexing circuitry is configured to multiplex the radio frequency signal from the upconversion unit to one of the plurality of baluns based on a wireless band being used.

Abstract: A method for communication in a communication terminal having a single communication module and at least two Subscriber Identification Module (SIM) cards is provided. The method includes performing a first call mode when a call is connected through a first base station in a standby mode by using the communication module and a first SIM card through a first time slot in each frame allocated by the first base station, and performing, when a second call is connected through a second base station while performing the first call mode, a second call mode using the communication module and a second SIM card through a second time slot in each frame allocated by the second base station, the second time slot being spaced apart from the first time slot.

Abstract: A mobile device and a method for controlling the same are disclosed, in which different lock states are provided depending on a mode which is currently implemented in a dual mode of a child mode and an adult mode, and different unlock interfaces are provided depending on the lock state.

Abstract: Disclosed herein is a power amplifier for time division multiple access. The power amplifier for time division multiple access includes: power amplifiers power-amplifying input transmission signals and outputting the amplified signals; a power control unit using a time division multiple access type to control amplification of the power amplifiers; a switching unit formed at output terminals of the power amplifiers and the power control unit and outputting the amplified signals to an antenna based on a switching pass determined by the power control unit; and a timing control unit formed at an input terminal of the power control unit and determining turn-on time of a second signal by a level of an output signal generated by comparing a first signal with reference voltage.

Abstract: An in-phase radio frequency (RF) power amplifier (PA) stage and a quadrature-phase RF PA stage are disclosed. The in-phase RF PA stage includes a first group of arrays of amplifying transistor elements and the quadrature-phase RF PA stage includes a second group of arrays of amplifying transistor elements. A group of array bias signals is based on a selected one of a group of DDS operating modes. Each of the group of array bias signals is a current signal. The in-phase RF PA stage biases at least one of the first group of arrays of amplifying transistor elements based on the group of array bias signals. Similarly, the quadrature-phase RF PA stage biases at least one of the second group of arrays of amplifying transistor elements based on the group of array bias signals.

Abstract: A multimode handset and method that includes a first communications path adapted to communicate using a mobile telephone communications protocol, a second communications path adapted to communicate using a local cordless communications protocol, and a processing unit in communication with the first communications path and the second communications paths and configured to switch between the first communications path and the second communications path during a telephone call.

Abstract: A mobile device configured to display at least one application executed in the first mode and the second mode respectively; a sensor unit configured to sense a user input for the mobile device; and a processor configured to: provide an unlock interface to unlock a lock state of the first mode or the second mode, display at least one application executed in the first mode and maintain the second mode in the lock state when the mobile device unlocks the first mode and enters into the first mode through the unlock interface, detect an event for the second mode in the first mode even though the second mode is in the lock state, indicate information related to the event for the second mode in the first mode, and process the event when the mobile device unlocks the second mode and enters into the second mode through the unlock interface.

Abstract: Embodiments of the invention provide novel solutions, including systems, methods and/or software, for handling calls in a dual-mode VoIP/cellular environment. Merely by way of example, some systems can be configured to determine whether to use a VoIP system or a cellular system to handle a particular call, and/or to transition a call from one network to the other network. Other systems can be configured to substitute a public number (which might be, for example, a VoIP number) for a private number (which might be, for example, a cellular number) when routing a call originating from a dual-mode phone on a cellular network. Further systems can be configured to allow a VoIP system to serve as an anchor for calls originated and/or delivered on a cellular system, for instance to facilitate a transition between cellular and VoIP service during a call.

Abstract: Electronic devices may be provided that contain wireless communication circuitry. The wireless communication circuitry may include radio-frequency transceiver circuitry coupled to antennas by switching circuitry. Multiple radio access technologies may be supported. A device may include first and second antennas. Control circuitry can configure the transceiver circuitry and switching circuitry to support operation of the device in active and idle modes for each radio access technology. In some configurations, both antennas may be used to support operations associated with one of the radio access technologies. In other configurations, the first antenna may be used to support operations with a first of the radio access technologies while the second antenna is used to support operations with a second of the radio access technologies.