In order to solve the problem of high collision rate and low timeliness of large-scale terminals access in the Internet of things. a large-scale terminal access algorithm based on slot ALOHA and adaptive access class barring (ACB) was proposed. Firstly. the services were classified based on the data from each terminal by the volume of the services processed and the requirements for de... https://foldlyers.shop/product-category/science-projects/