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Given the recent rapidly developing high speed wireless communication technologies and high traffic demand for P2P file sharing applications, wireless P2P file sharing is widely reckoned as a key component of the next generation communication network. However, running P2P applications in a wireless medium entails different constraints compared with those in the traditional wired Internet. One of the challenges is that portable wireless devices are energy-limited since they are battery-operated and the battery has inevitably limited life. Fairness and incentive are also important issues. Unfortunately, designing a protocol taking all these factors into account is still a relatively unexplored problem. We propose a topology control protocol called TCP2P for wireless P2P file sharing networks. TCP2P increases the fairness and provides incentive in wireless P2P file sharing applications and is energy-conserving.