495 results about "Cellular communication" patented technology

An automated security provisioning protocol is provided for wide area network communication devices in an open device environment, such as cellular communication devices in a machine-to-machine (M2M) environment. For example, a method for performing a security provisioning protocol between a first communication device and a second communication device over at least one wide area communication network comprises the following steps from the perspective of the first communication device. The first communication device automatically uses access information not previously provisioned in the wide area communication network to gain access to the wide area communication network for an initial purpose of communicating with the second communication device. The first communication device, upon gaining access to the wide area communication network, automatically performs an authenticated key exchange operation with the second communication device over the wide area communication network and establishes a secure communication key as a result of the authenticated key exchange operation for subsequent use by the first communication device for secure communications. The wide area communication network is operated by a first entity and the second communication device is operated by a second entity.

The invention discloses a communication method and a communication system from a device to a device and user devices. The method includes that a first user device detects a second reference signal sent by a second user device; the first user device sends a synchronization parameter according to a detected result; and according to the synchronization parameter, the second user device confirms a data transmission timing when the second user device carries out device-to-device (D2D) communication with the first user device. The method solves the technical problem that during the communication process in the prior art, a tradition cellular communication mode cannot be continuously used for achieving that service data are directly transmitted between user experience (UE), the purpose that under the situation that synchronization is successful, the D2D data sending timing is confirmed between the user devices is achieved, and therefore the technical effect of achieving the D2D communication in a cellular is achieved under the situation that complexity of the user devices is not remarkably increased.

A system and method for data communication over a cellular communications network that allows the transmission of digital data over a voice channel using a vocoder that operates in different modes depending upon characteristics of the inputted signal it receives. To prepare the digital data for transmission, one or more carrier signals are encoded with the digital data using one of a number of modulation schemes that utilize differential phase shift keying to give the modulated carrier signal certain periodicity and energy characteristics that allow it to be transmitted by the vocoder at full rate. The modulation schemes include DPSK using either a single or multiple frequency carriers, combined FSK-DPSK modulation, combined ASK-DPSK, as well as PSK with a phase tracker in the demodulator. These modulation schemes permit data communication via a CDMA, GSM, or other type of voice traffic channel at a low bit error rate.

Wireless terminals such as mobile phones which provide cellular communications for example for telephony and short message service (SMS) are well known and more recently such terminals are also able to provide FM radio reception. RDS information received at such a terminal is used to access a service provider via any suitable medium e.g. email, fax, telephone, SMS message, etc. This enables the end user to access the service provider quickly and effectively for example, to purchase a copy of a record heard on the radio or to request information about a product advertised on the radio. Also, the service provider is able to deal with the user interaction effectively because the RDS information can be used to assess the user's requirements for the transaction in advance. In a preferred example, the service provider comprises a contact center such as a call center and the RDS information is used to allocate an appropriate call center agent.

A femtocell power control module is operative to: obtain at least one uplink communication characteristic associated with the uplink signal transmitted by the at least one cellular communication device and received by the femtocell base station; estimate, from the obtained uplink communication characteristic, the power level of the downlink signals transmitted by the femtocell base station, as received by the at least one cellular communication device; if the estimated power level of the downlink signals transmitted by the femtocell base station as received by the at least one cellular communication device exceeds a predefined threshold power level, reduce the power level of the downlink signals transmitted by the femtocell base station to a reduced power level.

In a cellular communication network comprising a plurality of cells, and further comprising one or more multicast/broadcast service providers arranged to provide a plurality of multicast/broadcast services over a radio interface to a mobile communication device located in a current cell, a method is provided for providing radio bearer configuration information to enable the mobile communication device to receive a multicast/broadcast service. The method comprises the steps of providing to a mobile communication device messages containing information associated with the radio bearer configuration, wherein each message is associated with a plurality of multicast/broadcast services that are available to be transmitted to the mobile communication device when in the current cell, and, periodically transmitting the messages to the mobile communication device within the current cell.

One example method for reducing load is provided that includes monitoring traffic load within at least two wireless cells by a central management entity associated with the cellular communication network; determining by the central management entity that at least one of the at least two wireless cells being monitored, should hand over at least one of the mobile devices being currently serviced by a base station associated with that at least one cell; determining by the central management entity to which of the other cells from among the at least two wireless cells being monitored, should the at least one of the mobile devices be handed over to; and notifying each of the base stations associated with the other cells from among the at least two wireless cells being monitored, to affect a change in their respective one or more operating parameters.

Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active stabilization and differential measurement. Embodiment are directed to optical devices for imaging small biological objects with light. These embodiments can be applied to the fields of, for example, cellular physiology and neuroscience. These preferred embodiments are based on principles of phase measurements and imaging technologies. The scientific motivation for using phase measurements and imaging technologies is derived from, for example, cellular biology at the sub-micron level which can include, without limitation, imaging origins of dysplasia, cellular communication, neuronal transmission and implementation of the genetic code. The structure and dynamics of sub-cellular constituents cannot be currently studied in their native state using the existing methods and technologies including, for example, x-ray and neutron scattering. In contrast, light based techniques with nanometer resolution enable the cellular machinery to be studied in its native state. Thus, preferred embodiments of the present invention include systems based on principles of interferometry and/or phase measurements and are used to study cellular physiology. These systems include principles of low coherence interferometry (LCI) using optical interferometers to measure phase, or light scattering spectroscopy (LSS) wherein interference within the cellular components themselves is used, or in the alternative the principles of LCI and LSS can be combined to result in systems of the present invention.

A method performs communication resource control in at least one cell of a cellular communication network. The cell includes a base station communicating using at least one frequency and the cell is operated according to a time-based frequency reuse technique. A communication between a terminal and the base station is based on a time frame structure including a plurality of time slots. The method includes the step of obtaining, at the base station of the cell, loading conditions of at least one cell among the subject cell and its neighboring cells. The method also includes the step of adapting, at the base station of the cell, at least one parameter of communication resource control of the base station on the basis of the loading conditions obtained. A base station, a terminal, a system, and a computer program product to implement the method.

A cellular telephone system having three or more cell sites with each cell site having a source of cellular communication signals and an RF transmitter and antenna for broadcasting the cellular communication signals. A direct sequence spread spectrum waveform carrying navigation signals is embedded in the cellular communication signals, including controlling the signal strength of the navigation signals so that the combined energy of the navigation signals from all cell sites at any location is at least a predetermined energy level below the energy level of the cellular communication signals. Each cell site includes timing for timing the operation of a GPS receiver. An RF signpost system comprising a plurality of low powered RF broadcast stations, one each at a plurality of scattered geographic locations, each low powered RF broadcast station broadcasting a direct sequence spread spectrum digital RF waveform and means to modulate the digital RF waveform with location information identifying the geographic locations, respectively.

Methods and apparatus for efficiently directing communications are disclosed. On example entails receiving, from a mobile terminal, a communication directed to a cellular communication network, the communication being received in an alternative channel that differs from a channel of the cellular communication network. The communication is then converted for a relayed communication to the cellular communication network on behalf of the mobile terminal, the relayed communication being made through the cellular communication network.

Systems and methods for triggering interference mitigation at a wireless device in a cellular communications network are disclosed. In one embodiment, a node associated with a cellular communications network makes a determination to trigger interference mitigation at a wireless device based on a signal load in at least one interfering cell from which transmissions result in interference at the wireless device during reception from a desired cell, a relation between reference signals used in the desired cell and the at least one interfering cell, and a timing relation between at least one of a group consisting of: signals transmitted by the desired cell and the at least one interfering cell and signals received at the wireless device from the desired cell and the at least one interfering cell. In response to making the determination, the node triggers interference mitigation at the wireless device.

The invention discloses a D2D-based multi-access edge computing task unloading method in an Internet of Vehicles environment. According to the method, a task unloading strategy, transmitting power anda channel resource allocation mode are modeled into a mixed integer nonlinear programming problem, and the optimization problem is maximization of the sum of time delay and energy consumption benefits of all terminal CUE in cellular communication with a base station in an Internet of Vehicles system. According to the method, the time complexity is low, the channel resources of the Internet of Vehicles system can be effectively utilized, the time delay reliability of the terminal DUE performing local V2V data exchange in a D2D communication mode is ensured, meanwhile, the time delay and energyconsumption of the CUE are close to the minimum, and the requirements for low time delay and high reliability of the Internet of Vehicles are met. Verification is carried out by building a simulationplatform, the total time delay and energy consumption of the CUE are approximately minimized, and the method has performance advantages compared with a traditional task unloading method.

A multimodal mobile cellular node for use by emergency workers and law-enforcement personnel is disclosed. When installed on a hook-and-ladder truck, the node is used to locate and communicate with persons trapped in a high-rise building by fire. When carried by an aircraft, the node provides a cone of coverage, enabling cellular communication and interoperability between handsets using different types CMRS signals in the event some part of the local cellular infrastructure fails. The node also produces a CMRS beacon enabling the node to communicate with handsets individually using the ID numbers provided by their ID signals and to map the handsets' location and movements, to guide emergency relief efforts. These mobile nodes can also improve traffic safety by identifying drivers who are using cellphones while driving.