a deterministic power management protocol with dynamic listen interval for wireless ad hoc networks
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A Deterministic Power Management Protocol with Dynamic Listen Interval for Wireless Ad Hoc Networks. Zi-Tsan Chou Networks and Multimedia Institute VTC 06 Fall. Outline. Introductions APM Protocol Numerical Results Conclusions. Introductions. Introductions- Power Saving Mode.

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a deterministic power management protocol with dynamic listen interval for wireless ad hoc networks

A Deterministic Power Management Protocol with Dynamic Listen Interval for Wireless Ad Hoc Networks

Zi-Tsan Chou

Networks and Multimedia Institute

VTC 06 Fall

outline
Outline
  • Introductions
  • APM Protocol
  • Numerical Results
  • Conclusions
introductions motivation
Introductions - Motivation
  • Challenges of IEEE 802.11 PSM
    • Transmission opportunity
      • The problem of forever loss of ATIM frames
    • The efficient of energy use
      • The listen interval of Q is very large
introductions transmission opportunity
Introductions- Transmission opportunity
  • The problem of forever loss of ATIM frames
introductions the efficient of energy use
Introductions - The Efficient of Energy use
  • The listen interval of Q is very large
introductions related work
Introductions -Related Work
  • Dynamic listen interval
    • AQEC
introductions goal contribution
Introductions -Goal &contribution
  • Dynamic listen interval adjustmentability
  • Eliminate
    • the possibly forever loss of ATIM frames
    • the unnecessary waste of ATIM frames
    • the neighbormaintenance problem
apm protocol
APM Protocol
  • Three types of beacon interval
    • Normal Beacon Interval (NBI)
      • Beacon Window: Beacon frame
        • Beacon frame:
          • Listen Interval, Remaining number of BIs(RBI), MAC address, timestamp, and other management parameter.
      • Notification Window: ATIM , ATIM ACK
    • BW-only Beacon Interval (BBI)
      • Beacon Window: Beacon frame
    • Sleep Beacon Interval (SBI)
      • Doze off during the entire BI
apm protocol three beacon interval
APM Protocol –three beacon interval

802.11 PSM

Listen interval

ATIM Window

APM

Listen interval

NBI

SBI

BBI

ATIM Window

Notification Window

Beacon Window

apm protocol1
APM Protocol

Listen interval=7

1

2

3

5

6

0

1

0

4

P

LP* x+bp+1=O(P,Q)+LQ*y+bq+1

RBIQ=1

RBIP=2

Offset=2

1

2

0

1

2

0

0

Q

Listen interval=3

Notification Window

Beacon Window

apm protocol2
APM Protocol

LP* x+bp+1=O(P,Q)+LQ*y+bq+1

P

Data

ATIM

ACK

RBIP=0

ATIM

O(P,Q)=3

Q

t1

t0

5* x=3+5*y+bq ,bq={0,1,2}

=> y=1 ,bq=2 x=2

apm protocol design bi sets
APM Protocol- DesignBI sets
  • Zero-embracing selection
    • This property states that B naturally includes 0.
  • Prime-cardinality universe
    • This property requires that L must be one or an odd prime.
  • Nonempty rotation-intersection
apm protocol prime cardinality universe
APM Protocol- Prime-cardinality universe
  • P and Q always miss windows
apm protocol nonempty rotation intersection
APM Protocol- Nonempty rotation-intersection
  • W.S. Luk and T.T. Wong, “Two New Quorum Based Algorithms for Distributed Mutual Exclusion,” IEEE International Conference on Distributed Computing Systems, pp. 100–106, 1997.
    • M. Maekawa, “A algorithm for mutual exclusion in decentralized systems,”ACM Trans. Comput. Systs., pp. 145-159, May 1985.
numerical results
Numerical Results
  • Single hop MANET
    • 20 PS stations
    • Data rate : 11M
    • Beacon frame : 61 bytes
    • Power consumed
      • Transmit: 1.65 W
      • Receive: 1.4 W
      • Listen: 1.15 W
      • Doze: 0.045 W
      • Transition between doze and awake: 0.575 mJ
    • Beacon Interval: 100 ms
    • ATIM Window: 25 ms
      • In APM:
        • Beacon Window: 8 ms
        • Notification Window: 17 ms
conclusions
Conclusions
  • The author proposed a mechanism that
    • Stations could dynamically adjust its listen interval.
    • Solves three difficulties in 802.11 power saving mechanisms.
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