Enhanced Power Saving Scheme for IEEE 802.11 DCF Based Wireless Networks

Choi, Jong-Mu; Ko, Young-Bae; Kim, Jai-Hoon

doi:10.1007/978-3-540-39867-7_77

Cited by 21 publications

(12 citation statements)

References 3 publications

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“…Synchronous MAC protocols (such as S-MAC [8], T-MAC [9], IEEE 802.11 PSM [10]) have all nodes in the neighborhood wake up at the same time. Nodes achieve and maintain this synchronization by periodically exchanging schedule information among the neighbors.…”

Section: Leveraging Redundancy To Reduce Delay In Duty-cycled Netmentioning

confidence: 99%

Exploiting routing redundancy using MAC layer anycast to improve delay in WSN

Ashref

Kravets

Vaidya

2010

SIGMOBILE Mob. Comput. Commun. Rev.

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Abstract-Source-destination pairs in wireless sensor networks often have multiple shortest hop paths because the nodes are densely deployed. These multiple paths provide a great opportunity to reduce delay as well as energy in an asynchronous dutycycled network. In this paper, we exploit the redundancy available at the route layer using MAC-layer anycasting and reduce the delay incurred at each hop as the sender waits for its next hop node to be awake. By applying anycast to existing X-MAC and NPM protocols, we show that anycast can be incorporated into duty-cycled MAC protocols by using small modifications. Our evaluations in ns-2 show that the modified X-MAC and NPM protocols can achieve delay improvements of 30% and 12% respectively by exploiting the route level redundancy using anycast.

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Section: Leveraging Redundancy To Reduce Delay In Duty-cycled Netmentioning

confidence: 99%

Exploiting routing redundancy using MAC layer anycast to improve delay in WSN

Ashref

Kravets

Vaidya

2010

SIGMOBILE Mob. Comput. Commun. Rev.

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“…It improved energy efficiency without degrading throughput, and they revealed that highly loaded network may cause low throughput per energy unit because of the extra use of channel capacity for ATIM Window. TIPS (Traffic Indication-based Power Saving) [4) is another approach to prolong the doze state. lt allows the beacon transmission to indicate the presence of following ATIM, thus nodes to go to sleep early.…”

Section: Related Workmentioning

confidence: 99%

“…However, packet delivery rate may degrade because of the asynchrouns and fewer coincidence, and become more critical in the case of broadcasting. In this paper, we assume that the nodes are fully synchronized as assumed in [2][3] [4].…”

Section: Related Workmentioning

confidence: 99%

“…lt allows the beacon transmission to indicate the presence of following ATIM, thus nodes to go to sleep early. Both [3) and [4) , the modifications of IEEE 802.11 DCF-PSM, have focused on reducing the duration of the awake state, thus achieving more energy saving. However, they didn't pay attention to the long latency caused by the periodic sleeping and intermittent packet forwarding, and the effect of multi-hop transmission.…”

Section: Related Workmentioning

confidence: 99%

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Fast Flooding in Power Save Mode of IEEE 802.11 DCF Based Mobile Ad Hoc Networks

Seo

Yoon

Soo

2004

Lecture Notes in Computer Science

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Abstract. We propose Fast Flooding in Power Save Mode (FFPSM), a modification of IEEE 802.11 power save mode operation for Mobile Ad hoc NETworks (MANET). The previous works for the power save mode operation usually focused on shortening the duration of the awake state to minimize the power consumption of mobile nodes. We observed that the Ionger sleeping period results in seriously long delivery latency because the packets can move forward only one hop for a fixed interval. Our FFPSM scheme allows the flooding packets to be forwarded several hops in a transmission period. Each node propagates the announcements for next flooding to nodes of several hops away, thus the packets can travel multiple hops during one interval. Simulation results show that the proposed approach significantly reduces the end-to-end delay of flooding without extra energy consumption.

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“…In TIPS [13], the ATIM window is divided into two slots. If a beacon packet is received during the first slot, it indicates that nodes should stay on to receive ATIMs later in the ATIM window.…”

Section: Related Workmentioning

confidence: 99%

Improving power save protocols using carrier sensing for dynamic advertisement windows

Miller

Vaidya

IEEE International Conference on Mobile Adhoc and Sensor Systems Conference, 2005.

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Energy efficient protocols are important in ad hoc networks since battery life for wireless devices is limited. The IEEE 802.11 protocol specifies a simple power save mechanism (PSM) to conserve energy. However, the protocol needlessly wastes energy when traffic is light in a network, and significantly increases packet latency.In this paper, we consider three techniques to improve the 802.11 PSM protocol. The first technique, Carrier Sense ATIM, uses carrier sensing to drastically reduce the energy wasted listening to the channel in 802.11 PSM. The second technique, Dynamic ATIM, dynamically extends the listening period in 802.11 PSM based on packet advertisements that are overheard. In this manner, we are able to advertise data packets just as effectively as 802.11 PSM while significantly reducing wasteful listening. The final technique, PerLink Beacon Intervals, allows sender and receiver pairs to schedule their wake-up times independent from all the other nodes in the network based on past packet arrival times. Our results show that this technique is able to significantly reduce the average packet latency causing no or relatively little increase in energy. All of the protocols are extensively tested using the ns-2 simulator.

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Enhanced Power Saving Scheme for IEEE 802.11 DCF Based Wireless Networks

Cited by 21 publications

References 3 publications

Exploiting routing redundancy using MAC layer anycast to improve delay in WSN

Exploiting routing redundancy using MAC layer anycast to improve delay in WSN

Fast Flooding in Power Save Mode of IEEE 802.11 DCF Based Mobile Ad Hoc Networks

Improving power save protocols using carrier sensing for dynamic advertisement windows

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