Traditional RFID-based access control systems use flap barriers to help manage pedestrian and block unauthorized staff at any entrance, which requires visitors swipe their cards individually wait for the opening of blocking body, resulting in low-frequency even congestion places with large passenger flow. This paper proposes a barrier-free system (RF-Access) UHF RFID technology. The main advant...

The rapid technological change and uncertain future evolutions have a large impact on investment projects in the telecommunication sector. When new infrastructure networks are rolled out, the initial assumptions can prove to be untrue in the future, severely impacting the payoff. It is therefore extremely important that projects offer flexibility to allow the management to react to unforeseen c...

Electronic, software-managed mechanisms using, for example, radiofrequency identification (RFID) cards, enable great flexibility in specifying access control policies to physical spaces. For example, access rights may vary based on time of day or could differ in normal versus emergency situations. With such fine-grained control, understanding and reasoning about what a policy permits becomes su...