In synchronous TDM, it is possible to interleave hits, one bit from each channel participating in a cycle. If the channel is using a self-clocking code to assist synchronization, might this bit interleaving introduce problems because there is not a continuous stream of bits from one source?
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- In an FDMA-based multiple access system, each user is assigned an 80 kHz channel for full-duplex communication. There are 1000 channels in total in the system.What is the bandwidth for a single direction (user to base station) according to the information given above??Consider a 1Mbps transmission channel. The clock at the receiver has a drift of 1 second in one year. How long asequence of bits (or frame) can be sent before the clock drift could cause a problem? Assume that the sender and receiver are synchronized at the beginning of each frame and that they cannot resynchronize during the frame. Also, assume that the receiver samples the received signal at the middle of each bit duration to detect if it is 0 or 1.Given that, on an IEEE 802.11 WLAN channel, two stations transmit simultaneously at the 5th time slot of a contention window of size 15 slots.This means that the size of next contention window will be_____I NEED FULL EXPLANATION PLEASE
- Your company has a video transcoder. Each network interface returns the number of transmitted and received octets at a precise moment. The bitrates need to be added to the transcoder. Calculate the needed bitrates for receiving (Rx) and transmitting (Tx) considering a pooling rate of 4Hz. Tx: 289652580 Rx: 6488574452Consider TDM-based circuit switching with 8000 frames per second and 32 time slots per frame. During each time slot 8 bits are sent. What is the total transmission rate of the whole link in kbps?Differentiating between an isochronous and synchronous connection may be done by looking at their differences and similarities.
- Consider TDM-based circuit switching with 8000 frames per second and 32 time slots per frame. During each time slot 8 bits are sent. Assuming it is possible to combine several circuits, how many circuits does it take to keep the transmission time of a 1 Mbyte file below 15 seconds?A serial transmission T1 uses 8 information bits, 2 start bits, 1 stop bit and 1 parity bit for each character. A synchronous transmission T2 uses 3 eight-bit sync characters followed by 30 eight bit information characters. If the bit rate is 1200 bits/second in both cases, what are the transfer rates of T1 and T2?In ADSL, the OFDM symbol rate across all subcarriers is 4000 symbols per second. Assume that in the downstream direction, 25 subcarriers use 1024-QAM, 50 use 256-QAM, 100 use 64-QAM and 100 use 16-QAM. What is the overall bit rate
- A certain population of ALOHA users manages to generate 70 request/sec. If the time is slotted in units of 50 msec, then channel load would beCalculate the minimum timeout value for a stop-and-wait algorithm running over a 50-meter point-to-point copper link. Assume a minimum delay of 5 µs at the receiver. If you know the distance between two points, you can calculate the speed-of-light latency, although you have to be careful because light travels across different media at different speeds: It travels at 3.0 × 108 m/s in a vacuum, 2.3 × 108 m/s in a copper cable, and 2.0 × 108 m/s in an optical fiber.Subject - Data Communication Networks 1. What is the main feature of Time Division Multiplexing? a. simple and easy to implement b. fair time slot allocation per cyvle c. unused slots go wasted d. all of the above 2. passbonds signals run from 0 to a max frequency a. true b. False 3. The cost of signal mode fiber is more expensive than multi mode fiber a. True b. False