VALLIAMMAI ENGINEERING COLLEGE (A member of SRM Group of Institutions) Affiliated to Anna University, Accredited by NBA & ISO 9001:2008 Certified Institution SRM Nagar, Kattankulathur – 603203. DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING II SEMESTER M.E (COMMUNICATION SYSTEMS) CU 7005 – COGNITIVE RADIO QUESTION BANK UNIT-I INTRODUCTION TO SDR PART-A 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19) 20) What is Software-Defined Radio? Evolution of Software-Defined Radio What Is Cognitive Radio? What are the key applications of Cognitive Radio? Define dynamic spectrum access. What is the role of spectrum policy? What are the tradeoffs required in SDR? Mention the design tradeoffs in usage scenarios. What is agile radios? Define the term data explosion. Draw the cognitive radio bands. What are the security aspects of cognitive radio? What is the antenna design considerations in cognitive radio systems? Mention the types of antenna’s used in CR. What do you meant by cellular data boost? What is spectrum pooling and bandwidth exchange? Define prototyping. What are the implications of cognitive radio? Draw the architecture of cognitive radio. List out the potential benefits of SDR. VEC/ECE/CU7005-CR/QB (2014-15 EVEN) 1 PART-B 1) Think of any other term related to CR. Does the CR community need more terms to describe its work or is the descriptive process complete? Provide justification for your statements. 2) Discuss the future of CR as a technology for the development of new applications. 3) Define spectrum efficiency under CR. How is spectrum efficiency dependent on the various aspects of CR? 4) Describe the challenges and opportunities of cognitive radio. 5) Explain the architecture of SDR with neat diagrams and its implications. 6) Is spectrum scarce or plentiful? Explain your answer. 7) Briefly discuss the antenna design in cognitive radio. 8) Discuss in detail about the potential benefits and technology tradeoffs in SDR. 9) Explain the network & hardware design considerations in SDR. 10) Discuss about standardization activity in cognitive radio. UNIT-II SDR ARCHITECTURE PART-A 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19) 20) Mention some essential functions of the software radio. What are the architecture goals of SDR? Draw the topology of SDR. List out some properties of SDR. What are the acquisition parameters of software radios? Define software flexibility and affordability. Mention the applications of SDR Draw the SDR transceiver. What is the protocol stack of SDR? Give the different levels of reconfiguration in a transceiver. What is parameter controlled (PaC) SDR? What are the functional components in SDR? How the architectures are partitioned in SDR? What is the software design process? Design software objects. What are the architecture implications of SDR? What is the software radio design tradeoffs required? Define Programmable Digital Radio (PDR)? What are the design rules in SDR architecture? Draw the SDR forum architecture framework. VEC/ECE/CU7005-CR/QB (2014-15 EVEN) 2 PART-B 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) Define and explain each essential functions of the software radio. What are the architectural goals of SDR? Explain with neat diagrams. Explain the RF front-end architecture of SDR. Discuss about the use of MEMS in RF for SDR. Briefly describe in detail on top level component topology of SDR. With neat diagrams, explain the functional components and properties of SDR architecture. Explain the various interface topologies available for SDR. Discuss briefly about architecture partitions of SDR with diagrams. Explain the ideal and dynamic architecture of SDR. What are the degrees of programmability? Explain PDR UNIT III INTRODUCTION TO COGNITIVE RADIOS PART-A 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19) 20) Define self-aware cognitive radio. Differentiate iCR and DSA. What is cognition cycle? Draw the cognition cycle. List some characteristics of Radio Cognition Task. What are the potential impact areas of cognitive radio? Relation between SDR and CR What are the challenges in CR? What is location awareness in cognitive radio? Define environment awareness in CR. Draw the CR Meso-world framework. Define spectrum pooling. What is a policy language? List out the design considerations in CR. What are the design tradeoffs in usage scenarios? Define cross layer scheduling in cognitive radio networks. What is collaborative radio? Draw the architecture of cognitive radio network What are the fundamental limits of cognitive networks? Define intelligent radio and policy based radio. VEC/ECE/CU7005-CR/QB (2014-15 EVEN) 3 PART-B 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) Draw the cognitive radio framework and explain each block With a neat diagram, explain the simplified cognition cycle. List and explain the characteristics of radio cognition task. Explain the structuring knowledge for cognition tasks What are the primary concepts of location aware cognitive radio? Explain with neat architecture. Explain environment aware cognitive radio in detail. Discuss about ideal CRA and dynamic spectrum access architectures. Explain the architecture of Haykin dynamic spectrum with neat diagram. Write short notes on (i) Spectrum awareness (ii) Challenges and opportunities in CR Define and describe the design considerations for cognitive radio. UNIT IV COGNITIVE RADIO ARCHITECTURE PART-A 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17) What are the primary functions of Cognition? What is the objective of cognitive radio architecture? Mention the parameters of cognition function. Define behavior epoch. Mention the modes of behavior. Draw the cognitive behavior model. What is waking behavior? Define sleeping behavior. What is a conflict? Define prayer behavior. What are the components of CR? Define world model. Draw the minimum taxonomy of radio knowledge. What are the components of observe-phase data structures? Define binding in observe-phase data structure. Define decide-phase components What do you infer from Radio Procedure Knowledge Encapsulation? Define orient-phase components. VEC/ECE/CU7005-CR/QB (2014-15 EVEN) 4 18) What is the use of plan phase components? 19) What is act phase knowledge representation? 20) Describe any 2 design rules of cognitive radio. PART-B 1) 2) 3) 4) Discuss about the primary functions of cognitive radio with diagram What is behavior? Explain the various modes of behavior. With neat architecture, explain the cognitive radio components. Write short notes on a) A-Priori Knowledge Taxonomy b) Observe-phase data structure 5) Explain natural language encapsulation and Radio Procedure Knowledge Encapsulation 6) Explain the various components of cognitive radio architecture. 7) Describe the design rules in detail for cognitive radio 8) Explain the reinforced hierarchical sequences and NLE. 9) Discuss the components of orient, plan and decide phases in detail. 10) How cognitive radio functions are mapped to the components of a wireless PDA within the envisioned architecture? Explain UNIT V NEXT GENERATION WIRELESS NETWORKS PART-A 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) Define xG? What is the need of it? Draw the xG network architecture. What is reconfigurability? Give its parameters. Mention the functions of cognitive radios in xG network. What is Spectrum sensing and Spectrum mobility? Define cognitive capability. Draw the physical architecture of cognitive radio. List out some main components of wideband RF front-end architecture. What are the steps involved in cognitive cycle? Mention the applications of xG network. List out the challenges of spectrum sensing. What are the parameters of spectrum management? What do you meant by decision model? Define spectrum handoff. VEC/ECE/CU7005-CR/QB (2014-15 EVEN) 5 15) 16) 17) 18) 19) 20) What is spectrum sharing? Mention the steps involved in it. What is CCC? Differentiate Centralized and Distributed inter-network spectrum sharing. What are the upper layer issues in xG network? Justify what is the need of cross layer design in xG network? What are the cross layer challenges in upper layers? PART-B 1) Explain the xG network communication components and their interactions with diagram. 2) With physical architecture, discuss about the uses, characteristics and objectives of cognitive radio in xG network. 3) Explain the each components and its functionality of xG network architecture. 4) What are challenges and requirements of spectrum sensing? Explain 5) Discuss about spectrum management. 6) Define spectrum mobility. Explain its challenges and parameters in xG networks. 7) Explain in detail about spectrum sharing process with steps. 8) Write short notes on a. Inter-network spectrum sharing b. Intra-network spectrum sharing 9) Explain the upper layer issues in xG networks. 10) Describe in detail about the cross layer design issues in xG networks. VEC/ECE/CU7005-CR/QB (2014-15 EVEN) 6
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