Abstract
This paper proposes a dynamic spectrum access system for underground wireless communication——a dynamic spectrum sharing system under interference temperature constrains. It can make the best of spectrum resources and improve the utilization efficiency. Then, a multi-dimensional Markov chain is used to model the system. On the basis, the secondary users’ performance under interference temperature constrains is obtained. As two important performance indexes to measure secondary users’ performance, cognitive users’ interrupting probability and blocking probability are calculated. Finally, cognitive users’ performance under different users’ access is analyzed, and the performances in dynamic spectrum access system and overlay access system are compared. Simulation results indicate that the dynamic spectrum sharing access system under interference temperature constrains is superior to the overlay access system and helpful to improve the spectrum sharing system in coal mines.
Highlights
Coal mine tunnels are characterized by various shapes, sizes, corners, branches and inclinations
In traditional wireless communication system, the parameters of carrier frequency and modulation are generally fixed, which is hard to adapt to the tunnel environment with variable transmission characteristics
This paper studies the allocation model of underground wireless dynamic spectrum under interference temperature constraints
Summary
Coal mine tunnels are characterized by various shapes, sizes, corners, branches and inclinations. A study [4] analyzed spectrum sensing of cognitive radio and proposed a joint detection algorithm based on energy detection and cyclostationary characteristics It is used for spectrum sensing in mine communication. A three-dimensional Markov model was put forward in [7] to study the secondary users’ performance in the dynamic spectrum access system giving priority access for authorized users. Researchers [11] studied the spectrum sharing performance analysis of cognitive users under interference temperature constraints. Considering the three kinds of users, firstly, multi-dimensional Markov chain model is used to model the dynamic spectrum sharing system under interference temperature constraints. Simulation experiment indicates that the performance of low priority users in the dynamic spectrum allocation system under interference temperature constrains is significantly better than that in overlay dynamic spectrum access system
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
