An Online Network Selection Method for Multi-Authorization Cognitive Radio Networks
A cognitive radio and authorized network technology, applied in the field of online network selection of multi-licensed cognitive radio networks, can solve problems such as unstable CRN characteristics, and achieve optimal online network selection solutions, improved throughput, and low call drop rates. Effect
Active Publication Date: 2020-11-20
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, the preemptive priority of PU and the space-time variation characteristics of idle channels lead to the unstable characteristics of CRN
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0026] The present invention defines a network in which a CRN interacts with multiple authorized networks as a multi-authorized cognitive wireless network. The working process of multi-authorization cognitive radio network includes spectrum sensing and dynamic spectrum access. In order to reduce false alarm events and missed detection events, the present invention uses cooperative spectrum sensing technology, fully utilizes the diversity effect of cognitive users, and increases the sensing accuracy; in the dynamic spectrum access stage, considering the network diversity effect of multi-authorized networks, SU users When arriving, first select the network, and then access the authorized network with idle channels, which can effectively increase the throughput of CRN and the stability of SU user services. The present invention mainly studies the...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides an online network selection method for multi-licensed cognitive radio networks. Network selection scheme design is carried out for the condition that prior knowledge of licensednetworks is unknown and is sensed imperfectly. A collision limited online network selection scheme is provided, and through limitation of collision probabilities between PU (Primary Users) and SU (Secondary User), the interference of the SUs on the normal transmission of the Pus is reduced. According to the collision limited online network selection scheme, the collision probabilities of the licensed networks can be effectively controlled within an upper limit range. Due to the limitation of a collision probability updating mechanism, idle channels in the licensed networks are ignored by theCRNs (Cognitive Radio Networks), and access opportunities are wasted. In order to further improve the throughput of the CRNs, the invention also provides a greedy online network selection scheme and the online network selection scheme based on the minimum collision probability. A simulation result shows that according to the two schemes, the throughput of a CRN system can be improved, the online network selection scheme based on the minimum collision probability is optimal, and moreover, a relatively low call drop rate is obtained.
Description
technical field [0001] The present invention relates to the field of cognitive radio technology, in particular to an online network selection method for a multi-authorized cognitive radio network. Background technique [0002] With the rapid growth of demand for wireless communication services, spectrum resources are becoming increasingly scarce. However, the traditional wireless communication system adopts a static spectrum allocation policy, that is, authorized users have exclusive rights to their spectrum, and other users are not allowed to use it. Although this spectrum allocation method is conducive to ensuring the service quality of the system, due to the imbalance of communication services in time, space and frequency, spectrum resources have not been fully utilized. The scarcity of available spectrum resources and low spectrum utilization make a new wireless communication mode that optimizes the use of spectrum resources very necessary. Cognitive radio network (CRN...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H04W48/16H04W48/18H04B1/00
CPCH04B1/0003H04W48/16H04W48/18
Inventor 王野侯庆辉于佳张钦宇徐慧芳
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL