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CMPE 257: Wireless and Mobile Networking

CMPE 257: Wireless and Mobile Networking

CMPE 257: Wireless and Mobile Networking. Spring 2002 Week 3. CSMA Flavors. 1-persistent CSMA (IEEE 802.3) If medium idle, transmit; Else, continue to listen until channel becomes idle; then transmit immediately. If collision, backoff. Non-persistent CSMA: If medium idle, transmit;

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795 views • 64 slides
Wireless Networking Primer (few topics that may help in understanding other lectures)

Wireless Networking Primer (few topics that may help in understanding other lectures)

Wireless Networking Primer (few topics that may help in understanding other lectures). Nitin Vaidya University of Illinois at Urbana-Champaign. What Makes Wireless Interesting?. Absence of wires facilitate mobility Signal attenuation Spatial reuse Diversity Multi-user diversity

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726 views • 64 slides
Wireless Networking Primer (few topics that may help in understanding other lectures)

Wireless Networking Primer (few topics that may help in understanding other lectures)

Wireless Networking Primer (few topics that may help in understanding other lectures). Nitin Vaidya University of Illinois at Urbana-Champaign. What Makes Wireless Interesting?. Absence of wires facilitate mobility Signal attenuation Spatial reuse Diversity Multi-user diversity

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648 views • 64 slides
Unfairness in IEEE 802.11 Access Mechanism By Li Zhifei

Unfairness in IEEE 802.11 Access Mechanism By Li Zhifei

Unfairness in IEEE 802.11 Access Mechanism By Li Zhifei. Content Outline. Introduction Motivation Fixed EIFS Problem in IEEE 802.11 Enhanced VCS (EVCS) Conclusions Research Direction. Medium Access Protocol (MAC). Basic objectives: Maximize utilization of the limited bandwidth

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296 views • 19 slides
Date: 2014-09-05

Date: 2014-09-05

Improved Virtual Carrier Sensing Mechanism for 45GHz. Date: 2014-09-05. Authors:. ZTE Corp. Physical and virtual CS functions are used to determine the state of the medium. And the virtual CS mechanism shall be provided by the MAC. This mechanism is referred to as the NAV.

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226 views • 11 slides

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