Please answer all right and correct 1-3 Wireless Network

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1. The following figure shows the frame structure of which standard or wireless technology? In this technology, what are the functionalities of DL_MAP and UL_MAP? What are the functionalities of DCD and UCD? (1 point) Frame n-1 Frame n Frame n+1 Frame n+2 DL SUB Frame UL SUB Frame Preamble FCH DL MAP,UL MAP, DL burst 2 DL burst n DCD,UCD Fig1. Frame structure in time domain. 2. What is a SFID, and what is a CID? What is the difference between a Service Flow and a Connection? (1 poin) 3. The following figure shows that, using relays can extend communication distances. Assume the Decode-and-Forward relays are utilized, and application traffic is FTPITCP. The peak Throughput (TP) is 42 Mbps for a single Access Point (AP) without using relays. Briefly explain why the peak Throughput (TP) drops to around 20 Mbps using 1 relay, around 14 Mbps using 2 relays and approximate 10 Mbps using 3 relays. (3 points) Throughput with fixed relays at different distances 45 TP at AP _ TP at relay 1 at 100 m (20 dB receive antenna gain) TP at relay 2 at 200 m (20 dB receive antenna gain) TP at relay 3 at 300 m (20 dB receive antenna gain) 40 35 Maximum acheivable TP 30 25 High bit rate due to receive antenna gain at fixed relays 20- 1. The following figure shows the frame structure of which standard or wireless technology? In this technology, what are the functionalities of DL_MAP and UL_MAP? What are the functionalities of DCD and UCD? (1 point) Frame n-1 Frame n Frame n+1 Frame n+2 DL SUB Frame UL SUB Frame Preamble FCH DL MAP,UL MAP, DL burst 2 DL burst n DCD,UCD Fig1. Frame structure in time domain. 2. What is a SFID, and what is a CID? What is the difference between a Service Flow and a Connection? (1 poin) 3. The following figure shows that, using relays can extend communication distances. Assume the Decode-and-Forward relays are utilized, and application traffic is FTPITCP. The peak Throughput (TP) is 42 Mbps for a single Access Point (AP) without using relays. Briefly explain why the peak Throughput (TP) drops to around 20 Mbps using 1 relay, around 14 Mbps using 2 relays and approximate 10 Mbps using 3 relays. (3 points) Throughput with fixed relays at different distances 45 TP at AP _ TP at relay 1 at 100 m (20 dB receive antenna gain) TP at relay 2 at 200 m (20 dB receive antenna gain) TP at relay 3 at 300 m (20 dB receive antenna gain) 40 35 Maximum acheivable TP 30 25 High bit rate due to receive antenna gain at fixed relays 20