6.3B-4. Multiple Access protocols (4). Consider the figure below, which shows the arrival of 6 messages for transmission at different multiple access wireless nodes at times t=0.1, 0.8, 1.35, 2.6, 3.9, 4.2. Each transmission requires exactly one time unit. t=0.0 1 U U 1 2 3 4 Again consider the CSMA protocol (without collision detection), indicate those packets where the channel is sensed busy and therefore, under CSMA, that message transmission is not attempted. [Again, you should assume that it takes .2 time units for a signal to propagate from one node to each of the other nodes. You can assume that if a packet experiences a collision or senses the channel busy and that that node will not attempt a retransmission of that packet until sometime after t=5. Hint: consider propagation times carefully here]. 5 23 6 t=1.0 t=2.0 t-3.0 5 6 t=4.0 t=5.0
6.3B-4. Multiple Access protocols (4). Consider the figure below, which shows the arrival of 6 messages for transmission at different multiple access wireless nodes at times t=0.1, 0.8, 1.35, 2.6, 3.9, 4.2. Each transmission requires exactly one time unit. t=0.0 1 U U 1 2 3 4 Again consider the CSMA protocol (without collision detection), indicate those packets where the channel is sensed busy and therefore, under CSMA, that message transmission is not attempted. [Again, you should assume that it takes .2 time units for a signal to propagate from one node to each of the other nodes. You can assume that if a packet experiences a collision or senses the channel busy and that that node will not attempt a retransmission of that packet until sometime after t=5. Hint: consider propagation times carefully here]. 5 23 6 t=1.0 t=2.0 t-3.0 5 6 t=4.0 t=5.0
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
![6.3B-4. Multiple Access protocols (4). Consider the figure below, which shows the arrival of 6
messages for transmission at different multiple access wireless nodes at times t=0.1, 0.8, 1.35, 2.6,
3.9, 4.2. Each transmission requires exactly one time unit.
t=0.0
1
U
r
1
U
3
2
4
Again consider the CSMA protocol (without collision detection), indicate those packets where the
channel is sensed busy and therefore, under CSMA, that message transmission is not attempted.
[Again, you should assume that it takes .2 time units for a signal to propagate from one node to each
of the other nodes. You can assume that if a packet experiences a collision or senses the channel
busy and that that node will not attempt a retransmission of that packet until sometime after t=5.
Hint: consider propagation times carefully here].
5
2 3
a
t=1.0
t=2.0
4
t=3.0
56
t=4.0
t=5.0](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa3dbb91f-777d-47b2-aa94-40b3e17142a5%2Ff405c7d6-3a1a-43ae-94a2-b865b6f464a1%2F8uupzw9_processed.png&w=3840&q=75)
Transcribed Image Text:6.3B-4. Multiple Access protocols (4). Consider the figure below, which shows the arrival of 6
messages for transmission at different multiple access wireless nodes at times t=0.1, 0.8, 1.35, 2.6,
3.9, 4.2. Each transmission requires exactly one time unit.
t=0.0
1
U
r
1
U
3
2
4
Again consider the CSMA protocol (without collision detection), indicate those packets where the
channel is sensed busy and therefore, under CSMA, that message transmission is not attempted.
[Again, you should assume that it takes .2 time units for a signal to propagate from one node to each
of the other nodes. You can assume that if a packet experiences a collision or senses the channel
busy and that that node will not attempt a retransmission of that packet until sometime after t=5.
Hint: consider propagation times carefully here].
5
2 3
a
t=1.0
t=2.0
4
t=3.0
56
t=4.0
t=5.0
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