MURI: Computer network and QoS Support

1
MURI Computer network and QoS Support
Scope of the Research
Objectives

• 1.Improve system performance of an IEEE 802.11
  DCF network, in terms of access delay and channel
  utilization
• 2.Maximize the aggregate throughput of an IEEE
  802.11 DCF network subject to the weighted
  fairness constraint among traffic flows
• 3.Maximize the total revenue of service provider
  subject to user-specified Qos requirements
• 4.Controlled Qos metrics in degradable wireless
  cellular networks

• Design and evaluation of adaptive protocols in
  wireless networks

Accomplishments
Approaches taken

• PPacket level Qos
• 1.Dynamic fragmentation of the MAC service data
  units (MSDU
• 2. Adaptive PHY mode selection for each MAC
  protocol data unit (MPDU) transmission
• 3. Prioritized access to wireless medium and
  adaptively-adjusted contention window size

• CConnection level Qos
• 1. Revenue improvement via revenue-based forced
  termination admission algorithm
• 2.Controlled call blocking and forced-termination
  probability of hand-off calls
• 3. Controlled Degradation ration and Upgrade
  /degrade frequency

• PPacket level Qos
• 1. Goodput enhancement via link adaptation
• 2. Achieving MAC layer fairness
• 3. A unified wireless MAC protocol

Connection level Qos 1.Admission control
algorithm Forced-termination scheme 2. Bandwidth
allocation Hybrid architecture of
reservation-based and graceful degradation scheme