---
# System prepended metadata

title: '<center><i class="fa fa-edit"></i>ALOHA Basics: Skewed Workload </center>'
tags: [Internship]

---

# <center><i class="fa fa-edit"></i>ALOHA Basics: Skewed Workload </center>
###### tags: `Internship`
:::info
**Goal:**
- [x] Learn ALOHA System Model
 
**Resources:**
[ALOHA Random Access Protocol (Tutorials Point)](https://www.youtube.com/watch?v=g32GA0YR26U)
[Lecture PDF](http://web.mit.edu/6.02/www/currentsemester/handouts/L18_slides.pdf)
:::

### Skewed Workload
TDMA only performs well under a uniform workload
![](https://i.imgur.com/ahavTvn.png)

**Goal: Work well even under a skewed workload.**

### Nodes Can Independently Decide When to Transmit
- Slotted ALOHA requires all nodes to know the number of backlogged nodes
- Very difficult to do in practice
`p = probability that a node will transmit if it has something to transmit`
### Starved Nodes
![](https://i.imgur.com/PfraKbC.png)

### "Capture Effect"
![](https://i.imgur.com/hG61oix.png)

:::warning
Use pmin and pmax to Better Performance
:::
![](https://i.imgur.com/5lGz5cY.png)