### 6.3-1. Multiple Access Protocols (a)Consider the figure below, which shows the arrival of six messages for transmission at different multiple access wireless nodes at times \( t = 0.3, 1.7, 1.8, 2.5, 4.2, \) and \( 4.6 \). Each transmission requires exactly one time unit.#### Diagram Explanation:- The timeline is divided into segments labeled from \( t=0.0 \) to \( t=5.0 \).- Six messages are represented as red dots along the timeline, labeled from 1 to 6.- Message 1 arrives at \( t=0.3 \).- Messages 2 and 3 arrive at \( t=1.7 \) and \( t=1.8 \), respectively, indicating a potential collision.- Message 4 arrives at \( t=2.5 \).- Messages 5 and 6 arrive at \( t=4.2 \) and \( t=4.6 \), respectively, showing another potential collision.#### Task:For the **pure ALOHA protocol**, indicate which packets are successfully transmitted. Assume that if a packet experiences a collision, a node will not attempt a retransmission of that packet until sometime after \( t=5 \).#### Packet Options:- ○ 1- ○ 2- ○ 3- ○ 4- ○ 5- ○ 6Evaluate the above options considering the potential collisions and select the packets that would be successfully transmitted under the pure ALOHA protocol requirements.

Pure ALOHA can be defined in such a way that it is a easy and unslotted random entry to protocol…

6.3-1. Multiple Access protocols (a). Consider the figure below, which shows the arrival of 6 messages for transmission at different multiple access wireless nodes at times t = 0.3, 1.7, 1.8, 2.5, 4.2, 4.6. Each transmission requires exactly one time unit. t=0.0 O O O 1 N t=1.0 4 23 t=2.0 4 For the pure ALOHA protocol, indicate which packets are successfully transmitted. You can assume that if a packet experiences a collision, a node will not attempt a retransmission of that packet until sometime after t=5. t=3.0 5 t=4.0 6 t=5.0

6.3-1. Multiple Access protocols (a). Consider the figure below, which shows the arrival of 6 messages for transmission at different multiple access wireless nodes at times t = 0.3, 1.7, 1.8, 2.5, 4.2, 4.6. Each transmission requires exactly one time unit. t=0.0 O O O 1 N t=1.0 4 23 t=2.0 4 For the pure ALOHA protocol, indicate which packets are successfully transmitted. You can assume that if a packet experiences a collision, a node will not attempt a retransmission of that packet until sometime after t=5. t=3.0 5 t=4.0 6 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

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Question

### 6.3-1. Multiple Access Protocols (a)

Consider the figure below, which shows the arrival of six messages for transmission at different multiple access wireless nodes at times \( t = 0.3, 1.7, 1.8, 2.5, 4.2, \) and \( 4.6 \). Each transmission requires exactly one time unit.

#### Diagram Explanation:
- The timeline is divided into segments labeled from \( t=0.0 \) to \( t=5.0 \).
- Six messages are represented as red dots along the timeline, labeled from 1 to 6.
- Message 1 arrives at \( t=0.3 \).
- Messages 2 and 3 arrive at \( t=1.7 \) and \( t=1.8 \), respectively, indicating a potential collision.
- Message 4 arrives at \( t=2.5 \).
- Messages 5 and 6 arrive at \( t=4.2 \) and \( t=4.6 \), respectively, showing another potential collision.

#### Task:
For the **pure ALOHA protocol**, indicate which packets are successfully transmitted. Assume that if a packet experiences a collision, a node will not attempt a retransmission of that packet until sometime after \( t=5 \).

#### Packet Options:
- ○ 1
- ○ 2
- ○ 3
- ○ 4
- ○ 5
- ○ 6

Evaluate the above options considering the potential collisions and select the packets that would be successfully transmitted under the pure ALOHA protocol requirements.

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