Abstract: Systems, devices, and methods are described for scheduling radio frequency spectrum at a base station for one or more user equipment. A method may include receiving, at a base station of a radio-frequency communication network, a message from a user equipment. The message may include a transmission utilizing unlicensed spectrum or shared spectrum. The method may also include determining, based on the message, a degree of interference. The method may also include determining, based on the degree of interference, whether to service the user equipment using the unlicensed spectrum or shared spectrum. Related systems and devices are also disclosed.

Abstract: A technology is disclosed and described for distributing data packets. An example method may include creating a network connection between a source node and a gatherer server. Identifying a forwarder node available to connect to the source node via a wireless network. Sending connection protocol information to the forwarder node used by the forwarder node to connect to the gather server. Distributing the data packets to the forwarder node via the wireless network, whereupon the forwarder node transmits the data packets to the gather server over a forwarder cellular network utilized by the forwarder node and the gather server assembles the data using the data packets received from the forwarder node and sends the data to the client.

Abstract: Identifying valid wireless access points based on clock skews. A computing device receives plurality of frames, each including a corresponding timestamp, from a wireless access point. The computing device calculates transmit and receive offsets based on transmit and receive times of the plurality of frames, and also calculates differences between the transmit and receive offsets. The computing device also calculates a clock skew of a clock at the wireless access point based on a slope of the differences. The client computing device determines whether the wireless access point is an authorized wireless access point or an unauthorized wireless access point based on comparing the calculated clock skew with one or more known baseline clock skews of one or more authorized wireless access points.

Abstract: The ability of a receiver to determine when a transmitter has changed location is important for energy conservation in wireless sensor networks, for physical security of radio tagged objects, and for wireless network security in detection of replication attacks. In embodiments of the present invention, a measured temporal link signature is determined to uniquely identify the link between a transmitter and a receiver. The temporal link signature is an impulse response of a transmitted signal from the transmitter over a channel between the transmitter and a receiver over a channel. When the transmitter changes location, or if an attacker at a different location assumes the identity of the transmitter, the proposed link distinction methodology reliably detects the change in the physical channel. This detection can be performed at a single receiver or collaboratively by multiple receivers.

Abstract: A new methodology to exchange a random secret key between two parties. The diverse physical characteristics of the wireless medium and device mobility are exploited for secure key exchange. Unique physical characteristics of wireless channels between the two devices are measured at different random locations. A function of these unique characteristics determines the shared secret key between the two devices.

Abstract: A new methodology to exchange a random secret key between two parties. The diverse physical characteristics of the wireless medium and device mobility are exploited for secure key exchange. Unique physical characteristics of wireless channels between the two devices are measured at different random locations. A function of these unique characteristics determines the shared secret key between the two devices.

Abstract: A new methodology to exchange a random secret key between two parties. The diverse physical characteristics of the wireless medium and device mobility are exploited for secure key exchange. Unique physical characteristics of wireless channels between the two devices are measured at different random locations. A function of these unique characteristics determines the shared secret key between the two devices.

Abstract: A new methodology that uses clock skews of a wireless local area network access point (AP) as its fingerprint to detect unauthorized APs quickly and accurately. The clock skew is determined from time synchronization function (TSF) timestamps sent out in beacon probes.

Abstract: The ability of a receiver to determine when a transmitter has changed location is important for energy conservation in wireless sensor networks, for physical security of radio tagged objects, and for wireless network security in detection of replication attacks. In embodiments of the present invention, a measured temporal link signature is determined to uniquely identify the link between a transmitter and a receiver. The temporal link signature is an impulse response of a transmitted signal from the transmitter over a channel between the transmitter and a receiver over a channel. When the transmitter changes location, or if an attacker at a different location assumes the identity of the transmitter, the proposed link distinction methodology reliably detects the change in the physical channel. This detection can be performed at a single receiver or collaboratively by multiple receivers.

Abstract: Techniques are provided for controlling overload conditions using two values; an acceptance rate fraction allowed value and an occupancy fraction allowed value. The inventive techniques allow quick response to the sudden onset of overload conditions, are robust enough to be used when processor speeds are increased and compare favorably to known techniques.

Abstract: A new methodology to exchange a random secret key between two parties. The diverse physical characteristics of the wireless medium and device mobility are exploited for secure key exchange. Unique physical characteristics of wireless channels between the two devices are measured at different random locations. A function of these unique characteristics determines the shared secret key between the two devices.

Abstract: A network node computes a fair share data rate for the sharing of a shared communication channel in a local area network. The network node determines the required information for computing the fair share by snooping the network, by receiving the required information from other network nodes, or a combination of the two techniques. Alternatively, instead of computing the fair share data rate, the network node may receive the fair share data rate which was computed by another network node. The fair share data rate is enforced by the network node in a network protocol stack layer above the media access control layer. In one embodiment, the network protocol stack layer above the media access control layer is the link layer.

Abstract: Overload conditions affecting a processor of a network switch or the like are substantially eliminated, and the processing of traffic is gradually allowed to increase, by inserting, and then monitoring one or more probes which are placed into a queue of the processor. During a given measurement interval, if the number of probes exceeds a threshold then an overload condition exists. This condition is subsequently reduced using “multiplicative decrease” techniques. Conversely, if the threshold is not exceeded and there is little or no chance an overload condition can quickly reappear, traffic is allowed to once again be processed gradually using “additive increase” techniques.

Abstract: Techniques are provided for controlling overload conditions using two values; an acceptance rate fraction allowed value and an occupancy fraction allowed value. The inventive techniques allow quick response to the sudden onset of overload conditions, are robust enough to be used when processor speeds are increased and compare favorably to known techniques.

Abstract: A network node computes a fair share data rate for the sharing of a shared communication channel in a local area network. The network node determines the required information for computing the fair share by snooping the network, by receiving the required information from other network nodes, or a combination of the two techniques. Alternatively, instead of computing the fair share data rate, the network node may receive the fair share data rate which was computed by another network node. The fair share data rate is enforced by the network node in a network protocol stack layer above the media access control layer. In one embodiment, the network protocol stack layer above the media access control layer is the link layer.