Some of the latest advancements made in the field of secondary spectrum access networks and spatial models are discussed. Dynamic spectrum access (DSA) has been proposed as a potential approach to improve spectrum utilization by allowing new wireless systems to dynamically access or share the licensed band on a negotiated or an opportunistic basis. DSA strategies can be broadly categorized into three models, such as dynamic exclusive use model, open sharing model, and hierarchical access model. The open sharing model allows peer users to have equal spectrum access rights and use a common spectrum without interfering with others, while the hierarchical access model adopts a hierarchical access structure with primary and secondary users. It allows the secondary users to access the licensed spectrum under the condition that no harmful interference is caused to the primary users.
All Science Journal Classification (ASJC) codes
- Automotive Engineering