Abstract: Cooperative sensing scheduling and parameter designs are described, which can achieve improvements in energy efficiency in cognitive radio networks, for example. In addition, the disclosed subject matter describes an objective or reward function or policy related to energy efficiency and considerations such as channel assignments sensing time that can maximize the objective function. The disclosed details enable various refinements and modifications according to system design and tradeoff considerations.

Abstract: Providing for cooperative sensing in wireless communications that improves user terminal throughput and minimizes interference is described herein. According to some aspects, a network entity, such as a base station, can assign a set of SUTs to measure a subset of wireless channels in a target frequency according to a cooperative sensing arrangement. In particular aspects, this assignment can be implemented so as to increase or maximize potential traffic throughput of those SUTs within the target frequency, in a given wireless time slot. In this manner, cooperative sensing can be structured so as to provide more efficient traffic communications within the target frequency.

Abstract: Optimizing use, by a secondary terminal, of an idle wireless communication channel that is associated with a primary terminal is presented herein. A mapping component can receive: information including an indication that a communication channel assigned to a wireless device is idle; and one or more requests, from respective other wireless devices, to transmit information via the communication channel. Further, an allocation component can compute power allocations of the one or more requests, and grant a request of the one or more requests based on the power allocations. The allocation component can further be configured to iteratively compute a power allocation of the power allocations based on a bandwidth allocation of the bandwidth allocations; and iteratively compute a bandwidth allocation of the bandwidth allocations based on a power allocation of the power allocations.

Abstract: The disclosed subject matter relates to energy efficiency in mobile devices associated with a wireless communications environment. Power Saving Classes (PSCs) aim to reduce the power consumption of mobile devices based on the different types of traffic. Optimizing sleep mode selection schemes so as to maximize the energy efficiency while providing a QoS guarantee can be accomplished with optimization of a theoretical framework based on the semi-Markov Decision Process along with a performance evaluation on the sleep mode operation. A novel Policy Optimization algorithm is capable of finding optimized policies for a selection of different PSCs.

Abstract: An efficient media streaming method utilizing a globally load balanced overlay network. This method makes use of capacity per out-degree values to construct and maintain an overlay network for media streaming in a Peer-to-Peer environment.

Abstract: A novel decentralized protocol for constructing a tree-based P2P live video streaming network with the Interior-Node-Disjoint (IND) multi-tree structure with the special Link-Level-Homogeneous property. The IND multi-tree structure recycles the wasted uploading capacities of leaf nodes in the tree-based P2P networks. The IND multi-tree structure also enhances the robustness of the tree-based P2P networks. Moreover, the special Link-Level-Homogeneous property eliminates the bottlenecks in the video delivery paths by ensuring that each downloading link in the network has identical bandwidth reserved. This special designed architecture greatly improves the downloading performance.

Abstract: Cooperative sensing scheduling and parameter designs are described, which can achieve improvements in energy efficiency in cognitive radio networks, for example. In addition, the disclosed subject matter describes an objective or reward function or policy related to energy efficiency and considerations such as channel assignments sensing time that can maximize the objective function. The disclosed details enable various refinements and modifications according to system design and tradeoff considerations.

Abstract: Systems, methods, and apparatus for optimizing a use, by a secondary terminal, of an idle wireless communication channel that is associated with a primary terminal are presented herein. A mapping component can receive: information including an indication that a communication channel assigned to a wireless device is idle; and one or more requests, from respective other wireless devices, to transmit information via the communication channel. Further, an allocation component can compute power allocations of the one or more requests; and grant a request of the one or more requests based on the power allocations. The allocation component can further be configured to iteratively compute a power allocation of the power allocations based on a bandwidth allocation of the bandwidth allocations; and iteratively compute a bandwidth allocation of the bandwidth allocations based on a power allocation of the power allocations.

Abstract: Providing for a cross-layer spectrum sharing model incorporating implicit power control for cognitive radio wireless communication is described herein. By way of example, a binary integer linear programming problem is formulated to establish active wireless links among secondary user nodes in a cognitive radio, ad-hoc network. The formulation reuses wireless channels among multiple activated links within disclosed interference constraints, and assigns a power level for transmissions on respective links. Additionally, the formulation employs bi-directional wireless links for the ad-hoc network, improving communication within the ad-hoc network. Further, power level assignments can be predefined and implicitly embedded in the formulation to reduce complexity.

Abstract: Providing for cooperative sensing in wireless communications that improves user terminal throughput and minimizes interference is described herein. According to some aspects, a network entity, such as a base station, can assign a set of SUTs to measure a subset of wireless channels in a target frequency according to a cooperative sensing arrangement. In particular aspects, this assignment can be implemented so as to increase or maximize potential traffic throughput of those SUTs within the target frequency, in a given wireless time slot. In this manner, cooperative sensing can be structured so as to provide more efficient traffic communications within the target frequency.

Abstract: The disclosed subject matter relates to energy efficiency in mobile devices associated with a wireless communications environment. Power Saving Classes (PSCs) aim to reduce the power consumption of mobile devices based on the different types of traffic. Optimizing sleep mode selection schemes so as to maximize the energy efficiency while providing a QoS guarantee can be accomplished with optimization of a theoretical framework based on the semi-Markov Decision Process along with a performance evaluation on the sleep mode operation. A novel Policy Optimization algorithm is capable of finding optimized policies for a selection of different PSCs.

Abstract: A method and apparatus for providing streaming data to multiple clients involves the provision of intelligent gateway at the edge of a network. The gateway is designed so that if it receives a request from a second client within the network for a data stream already being supplied to a first client in the network, that data stream is duplicated by the gateway rather than making a second request for the same stream from a server. Multiple such gateways can be combined to form a large load balancing network. An important aspect of the invention is a software interface in the gateway that enables a data packet address type to be changed from unicast to multicast and vice versa.

Abstract: A coding scheme is provided transporting encoded information over an optical communications link to a network. Multi-word information groups are analyzed to determine whether each of the information groups includes control characters. If the information group does not include any control characters, an encoded information stream including a set data indicator and data words is generated. If the information group includes one or more control characters, an encoded information stream is generated which includes control code counters, a transition indicator, location pointers, control codes that are encoded from the control characters, and any data. Accordingly, the necessary bandwidth for transporting the information is reduced by using this encoded information stream without sacrificing any control information.

Abstract: A coding scheme is provided for transporting information over an optical communications link to a network. Information containing data and control characters is encoded after segmenting the information into multi-word information groups and determining whether each of the information groups includes control characters. If the information group does not include any control characters, an encoded information stream including a set data indicator and data words is generated. If the information group includes one or more control characters, the control characters are encoded to control codes and a control code map is generated for representing placement positions of the control characters within the information group. Then, an encoded information stream is generated to include the control code map combined with one of the control codes as well as the remaining control codes and/or data words.

Abstract: A coding scheme is provided transporting encoded information over an optical communications link to a network. Multi-word information groups are analyzed to determine whether each of the information groups includes control characters. If the information group does not include any control characters, an encoded information stream including a set data indicator and data words is generated. If the information group includes one or more control characters, an encoded information stream is generated which includes control code counters, a transition indicator, location pointers, control codes that are encoded from the control characters, and any data. Accordingly, the necessary bandwidth for transporting the information is reduced by using this encoded information stream without sacrificing any control information.

Abstract: A packet scheduling system is disclosed in which a plurality of first-in-first-out input buffers are provided each corresponding to a respective input data stream to a switching node or multiplexer. Credit is allocated to each stream having packets waiting to be transmitted and which is unable to transmit, and the next stream to be transmitted is based on the allocated credit values, the credit of a transmitted stream being reduced after transmission of a data packet from that stream.