Wireless sensor networks for agriculture

Research and development of signal processing algorithms for UMTS Long Term Evolution (LTE) requires a realistic, flexible, and standard-compliant simulation environment. To facilitate comparisons with work of other research groups such a simulation environment should ideally be publicly available. In this paper, we present a MATLAB-based downlink physical-layer simulator for LTE. We identify different research applications that are covered by our simulator. Depending on the research focus, the simulator offers to carry out single-downlink, single-cell multi-user, and multi-cell multi-user simulations. By utilizing the Parallel Computing Toolbox of MATLAB, the simulator can efficiently be executed on multi-core processors to significantly reduce the simulation time.

/pdf/simulating-the-long-term-evolution-physical-layer-59oblcsumo.pdf

Simulating the Long Term Evolution physical layer

A method comprising providing a plurality of links to a plurality of end-user devices communicatively coupled to a network system, a particular link of the plurality of links supporting control-plane communications between the network system and a particular end-user device of the plurality of end-user devices over one or more wireless access networks; receiving a message from a server communicatively coupled to the network system, the message comprising payload for delivery to the particular end-user device; generating an encrypted message comprising the payload and an identifier identifying a particular device agent of a plurality of device agents on the particular end-user device, the identifier configured to assist in delivering at least a portion of the payload to the particular device agent on the particular end-user device; and sending the encrypted message to the particular end-user device over the particular link.

Automated Device Provisioning and Activation

The use of multiple antennas at base stations is a key component in the design of cellular communication systems that can meet high-capacity demands in the downlink. Under ideal conditions, the gai ...

/pdf/optimal-resource-allocation-in-coordinated-multi-cell-24v9usph8q.pdf

Optimal Resource Allocation in Coordinated Multi-Cell Systems

Disclosed herein are methods, systems, and apparatuses to enable subscribers of mobile wireless communication devices to view, research, select and customize service plans; to create and manage device groups, share and set permission controls for service plans among devices in device groups; to manage communication services through graphical user interfaces; to sponsor and promote service plans; and to design, manage, and control communication services through application programming interfaces.

Service Plan Design, User Interfaces, Application Programming Interfaces, and Device Management

This paper provides a high-level overview of some technology components currently considered for the evolution of LTE including complete fulfillment of the IMT-advanced requirements. These technology components include extended spectrum flexibility, multi-antenna solutions, coordinated multipoint transmission/reception, and the use of advanced repeaters/relaying. A simple performance assessment is also included, indicating potential for significantly increased performance.

LTE-Advanced - Evolving LTE towards IMT-Advanced

The technology described herein provides wireless charging for battery- operated electronic devices (14) including both mobile and fixed battery-operated devices. A wireless charging system, based on any suitable wireless charging technology(ies), allows easy access / discovery, registration, authorization, monitoring, and/or compensation for charging services. The technology uses donor mobile radio nodes (12) that register as potential charging stations for requesting radio nodes (14). The donor and requesting nodes negotiate the charging event, and in a preferred example embodiment, payment by the requester for the charging service to donor is arranged.

Charging of battery-operated devices over wireless connections

Packets are selectively marked or dropped when congestion of the radio resources is experienced, the selective marking/dropping being related to or dependent on the probability that a packet will be marked with the relative efficiency of usage of the radio link by the receiver, e.g., dependent upon radio resource usage costs and fairness. For example, packets are marked or dropped based on a user's associated share of the total (or a subset of the) shared radio resources. This share may be expressed in terms of the costs of the resources in terms the user's level of utilization of the shared resources, or in terms of it's fairness with respect to other users sharing the same resources. Thus, the present technology takes into account the distribution of resources usage between receivers contributing to the congested state of the radio network.

Congestion control in a transmission node

A method for a network node, a method for a relay wireless device, a method for an out of coverage wireless device, a network node, and a relay wireless device, an out of coverage wireless device are presented. The network node serves a cell in which a relay wireless device is at least partially located, and where further the network node provides at least partial network coverage for the relay wireless device located in the cell, and where furthermore an out of coverage wireless device is at least partially out of network coverage from the network node. The method includes determining that the network node should control the out of coverage wireless device. The method further includes determining D2D control information to be used for controlling the out of coverage wireless device (305), and finally the method includes transmitting the D2D control information to the out of coverage wireless device via a relay wireless device.

Device to device (d2d) control information relay

The invention relates to a method for controlling a bit-rate of a session in a packet-switched communications system where multiple sessions are set-up via a shared resource. A current bit-rate of the session is compared to a bit-rate range valid for the session to determine a distance from the position of the current bit-rate to one of the end-points of the bit-rate range. The current bit-rate is then adapted differently depending on the distance to the selected end-point. By controlling the bit-rate of each session that is set-up via the shared resource for applications that provide delay-sensitive services to users in this way the method and corresponding system and sender- receiver arrangements have the effect that rate adaptations can be distributed among the applications so that users share responsibility for rate adaptations.

Stefan Wänstedt

Papers

LTE-Advanced - Evolving LTE towards IMT-Advanced

Charging of battery-operated devices over wireless connections

Congestion control in a transmission node

Device to device (d2d) control information relay

Adaptive rate control in a communications system