Pervasive computing, which requires applications composed of independent and distributed components, is an important domain for dynamic ubiquitous heterogeneous environment. However, one of the critical challenges it faces is resource allocation. To overcome the difficulty, enhanced universal service terminal (UST+) is designed as a reflective middleware combined distributed components with particular features to achieve user goals. Moreover, a novel algorithm based on microeconomics is presented to resolve conflicting resource allocation and is implemented on top of the UST+. Besides, an example outlines how this algorithm is used in pervasive computing, and the simulation results illustrate that the proposed mechanism can achieve high performance at low cost.