In recent years, various novel services appear in Long Term Evolution (LTE) networks to attract many users but cannot satisfy requirements of users with the available network bandwidth. However, most countries have no licensed spectrum available to LTE networks. To resolve this problem and compete Wi-Fi, 3rd Generation Partnership Project (3GPP) proposes the Licensed Assisted Access (LAA) to make LTE networks work on unlicensed bands. In this paper, we do some research on LAA related mechanisms and propose a new algorithm for it. We use simulations to show that our proposal can give LTE networks lower average collision times and average delay time than LAA. Our algorithm is capable of improving LAA in the future.
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