Wireless and Mobile Networks

These flashcards cover the key concepts and terminology related to wireless and mobile networks as described in lecture notes.

What is the ratio of mobile phone subscribers to fixed phone subscribers as of 2019?

10-to-1

What are the two major challenges in wireless and mobile networks?

Communication over wireless links and managing mobility of users.

What does SDN stand for in the context of mobile networks?

Software Defined Networking.

What does the acronym MAC stand for in wireless communication?

Medium Access Control.

What does the term 'handoff' refer to in wireless networks?

The process of transferring an ongoing call or data session from one base station to another.

What is a base station responsible for in a wireless network?

Sending packets between the wired network and wireless hosts in its area.

What frequency bands does the IEEE 802.11 wireless LAN standard operate on?

2.4 GHz and 5 GHz.

What does CDMA stand for in wireless communication?

Code Division Multiple Access.

What is multipath propagation in wireless communication?

Radio signals reflecting off objects and arriving at the destination at different times.

What technique is used to avoid collisions in 802.11 networks?

Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA).

What is the primary purpose of the Power Management feature in wireless networks?

To conserve battery life on mobile devices.

What is the role of a Home Subscriber Server (HSS) in a 4G system?

To store information about mobile devices in its network.

What is 'OFDMA' in LTE networks?

Orthogonal Frequency Division Multiple Access, a method of multiplexing different user's data.

What does the SNR stand for in the context of wireless communication?

Signal-to-Noise Ratio.

What does the term 'hidden terminal problem' refer to?

A situation where two nodes are unable to detect each other's transmissions, resulting in potential interference.

What are the two frequency bands utilized by 5G?

FR1 (450 MHz–6 GHz) and FR2 (24 GHz–52 GHz).

How does mobile IP handle user mobility?

By using indirect routing through a home network.

What is a 'piconet' in Bluetooth networking?

A small ad hoc wireless network of devices connected via Bluetooth.

What is the ratio of mobile phone subscribers to fixed phone subscribers as of 2019?

10-to-1

What are the two major challenges in wireless and mobile networks?

Communication over wireless links and managing mobility of users.

What does SDN stand for in the context of mobile networks?

Software Defined Networking.

What does the acronym MAC stand for in wireless communication?

Medium Access Control.

What does the term 'handoff' refer to in wireless networks?

The process of transferring an ongoing call or data session from one base station to another.

What is a base station responsible for in a wireless network?

Sending packets between the wired network and wireless hosts in its area.

What frequency bands does the IEEE 802.11 wireless LAN standard operate on?

2.4 GHz and 5 GHz.

What does CDMA stand for in wireless communication?

Code Division Multiple Access.

What is multipath propagation in wireless communication?

Radio signals reflecting off objects and arriving at the destination at different times.

What technique is used to avoid collisions in 802.11 networks?

Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA).

What is the primary purpose of the Power Management feature in wireless networks?

To conserve battery life on mobile devices.

What is the role of a Home Subscriber Server (HSS) in a 4G system?

To store information about mobile devices in its network.

What is 'OFDMA' in LTE networks?

Orthogonal Frequency Division Multiple Access, a method of multiplexing different user's data.

What does the SNR stand for in the context of wireless communication?

Signal-to-Noise Ratio.

What does the term 'hidden terminal problem' refer to?

A situation where two nodes are unable to detect each other's transmissions, resulting in potential interference.

What are the two frequency bands utilized by 5G?

FR1 (450 MHz–6 GHz) and FR2 (24 GHz–52 GHz).

How does mobile IP handle user mobility?

By using indirect routing through a home network.

What is a 'piconet' in Bluetooth networking?

A small ad hoc wireless network of devices connected via Bluetooth.

What is a 'wireless link'?

A communication channel established without physical cables, typically using radio waves.

What is an 'Access Point' (AP) in a wireless network?

A device that allows wireless devices to connect to a wired network.

What does 'roaming' mean in mobile networks?

The ability of a mobile device to automatically connect to networks other than its home network.

What is a 'cellular network'?

A telecommunications network where the service area is divided into cells, each served by at least one fixed-location transceiver (base station).

What is 'frequency reuse' in cellular networks?

The practice of using the same radio frequencies for different transmissions in geographically separated cells to increase network capacity.