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: A system testing method through a subsystem performance-based generator is used to perform tests on a single module performance in a Linux system. The subsystem performance-based generator generates an initial performance testing parameter, and sets a memory occupying space, CPU occupation rate, and I/O performance of a module to be tested according to the testing parameter. After setting the testing parameter, the performance of the whole Linux system is tested through a performance testing tool. Next, another performance testing parameter is generated by the subsystem performance-based generator, and then the system performance test is performed after setting the module to be tested accordingly. Various performance value settings of the module to be tested are dynamically adjusted through the method, and then the performance test of the whole system is performed, so as to accurately find out the bottleneck problem of the performance, thereby improving reliability of the system test.