Chapter 1 Assignments Review 1:What advantages does TDM have over FDM in a circuit-switched network? Please compare different multiplexing technologies used in Mobile phone system: TDM, FDM, CDM, and explain how 4G uses TDM or FDM.
Problem6:In this problem we consider sending real-time voice from Host A to Host B over a packet-switched network (VoIP). Host A converts analog voice to a digital 64 kbps bit stream on the fl y. Host A then groups the bits into 56-byte packets. There is one link between Host A and B; its transmission rate is 2 Mbps and its propagation delay is 10 msec. As soon as Host A gathers a packet, it sends it to Host B. As soon as Host B receives an entire packet, it converts the packet's twobits to an analog signal. How much time elapses from the time a bit is created (from the original analog signal at Host A) until the bit is decoded (as part of the analog signal at Host B)?