tags:
- cellular
- wireless
- networks
- presentation
- notes
source: https://cs.nyu.edu/~anirudh/CSCI-GA.2620-001/scribe_notes/lec11.pdfHow do each of the cellular technologies over the years compare?
The cellular technologies over the years have evolved like this:
| Generation | Years | Features | Capacity | Applications |
|---|---|---|---|---|
| 1G | 1980-1990 | Voice only | - | Only phone calls. |
| 2G | 1991-2000 | Voice and data | <100 Kbps | SMS and RSS feeds. |
| 3G | 2000-2010 | Voice and data | Up to 21.1 Mbps | Basic internet, emails, rich text, and images. |
| 4G | 2010-2019 | Voice and data | Up to 100 Mbps | Video browsing, conference calls, and multiplayer gaming. |
| 5G | 2019-Present | Voice and data | Up to 1 Gbps | Better support for IoT devices. |
What is a cell?
A cell is a section of a geographical area that needs service from the network.
How are cells categorized?
Cells are categorized by their size.
What is a base station?
A base station is a wireless transceiver or router that connects mobile devices to a physical or wireless network.
Where are base stations located?
Base stations are located at the center of a cell on a tower.
What is modulation in simplistic terms?
Modulation, in simplistic terms, is the process of piggybacking data on a carrier signal which is transmitted over a telecommunication medium.
How does Time Division Multiple Access (TDMA) allow multiple users to use the same frequency at the same time?
Time Division Multiple Access (TDMA) allowed multiple users to use the same frequency at the same time by allocating a time slot for each user to send data.
How does Code Division Multiple Access (CDMA) allow multiple users to use the same frequency at the same time?
Code Division Multiple Access (CDMA) allowed multiple users to use the same frequency at the same time by assigning a code to each transmitter.
What was Global System for Mobile Communication (GSM)?
Global System for Mobile Communication (GSM) was the standard used by 2G/3G networks.
What multiple access technique did GSM use?
GSM used a modified version of TDMA.GSM was a ... switched system.
GSM was a circuit switched system.
What is Long Term Evolution (LTE)?
...
What is Resource Allocation in an LTE network?
In an LTE network, Resource Allocation is the act of dividing radio resources into multiple frames, and dividing those frames into multiple subframes along time and a frequency.What are the subframes created by Resource Allocation called?
The subframes created by Resource Allocation are called resource elements.What are the two types of information LTE networks need to send to users?
The two types of information LTE networks need to send to users are control information and data information.What are channels in an LTE network?
In an LTE network, channels are created by assigning a group of resource elements to a particular type of information.How are control channels created in an LTE network?
Control channels are created in an LTE network by assigning a group of resource elements to control information.How are data channels created in an LTE network?
Data channels are created in an LTE network by assigning a group of resource elements to data information.What is a Cell Radio-Network Temporary Identifier (C-RNTI)?
A Cell Radio-Network Temporary Identifier (C-RNTI) is a unique ID assigned to a device connected to a base station for communication during a session.
More: What Is C-RNTI by Armin Derkaur