Wireless Ad Hoc and Sensor Networks

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Optimized Energy and Delay-Based Routing 417TABLE 8.2Comparison of G4-SSN and ISN CapabilitiesIc @ 3.3 V[mA]Flash Memory[bytes]RAM[bytes]ADC SamplingRate [kHz] Form-Factor MIPSG4 35 128k 8448 100 @ 10/12-bit 100-pin LQFP 100ISN 7 16k 1280 200 @ 10-bit 32-pin LQFP 25X-Bow 8 128k 4096 15 @ 10-bit 64-pinTQFP8work is being undertaken to develop a better CH that is more powerfulthan an ISN and smaller in size than a G4-SSN.8.10.1.4 Comparison of ISN and G4-SSN CapabilitiesThe abilities of the G4-SSN and the ISN sensor nodes are compared inthis section. The ISN was designed to be a simplified sensor node withthe abilities to sample, process, and transmit data. The ISN has a limitedability to process data relative to the G4-SSN. The abilities of the twonodes are shown in Table 8.2, with a comparison to other commerciallyavailable hardware. As seen in the table, the G4-SSN has approximatelyfour times the processing speed available relative to the ISN. Memoryconstraints are also shown between the two sensor nodes, with the G4-SSN having more available code space and RAM. This translates to thedesign criteria for the ISN to be a “simple sample-and-send sensor node.”In comparison, the G4-SSN is used for networking functionality andother tasks that require more memory and processing ability. In the nextsection, an overview of the software architecture is given for the OEDSRimplementation.8.10.2 Software ArchitectureThe software architecture for 8051 platform is presented in this section.The network stack is presented, and the layers are discussed in detail. Thesoftware architecture utilized to implement OEDSR protocol on 8051 platformis presented in Figure 8.50.The three-tier structure is used to provide flexibility to the radio andapplication design. The wireless radio dependent components are interfacedwith networking layers through the message abstraction layer. Thislayer provides generic access to the physical and link-level parametersand information, for example, transmission power level and RSSI indicator.Consequently, cross-layer protocols such as the OEDSR can be easilyimplemented.
418 Wireless Ad Hoc and Sensor Networks8051 platformApplicationspecificApplication layer(sensing and processing)Queueing and scheduling layerWirelessnetworkprotocolsRouting layerMessage abstraction layerHardware interfacing layer(802.15.4 API)Wirelessradiodependent802.15.4 moduleFIGURE 8.50Software architecture of OEDSR implementation.The main components of the software architecture consist of the following:• Physical interface between 8051 and 802.15.4 module — in theused setup a standard serial interface connects processor withradio module• Abstraction layer — provides generic access to the physical andlink layers• Routing layer — contains the OEDSR implementation• Queuing — employs a simple drop-tail queuing policy• Sensing application — application dependent measurement andprocessing of sensor data8.10.2.1 Routing ImplementationIn this section, the implementation of the routing protocol is described.Packets used by the routing protocol, handling of traffic cases by a node,and memory handling are presented.
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Wireless Ad Hocand SensorNetworksPr
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18. Chaos in Automatic Control, edi
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CRC PressTaylor & Francis Group6000
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Table of Contents1 Background on Ne
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3 Congestion Control in ATM Network
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5.4.2 Distributed Power Controller
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7.3 Adaptive and Distributed Fair S
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9.2.2 Overview.....................
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the number of connections in each l
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y Maheswaran Thiagarajan, and tirel
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2 Wireless Ad Hoc and Sensor Networ
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10 Wireless Ad Hoc and Sensor Netwo
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2BackgroundIn this chapter, we prov
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Background 51u(k)x n (k + 1)x n (k)
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Background 53with x( 0)being the in
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Background 55with tr(.) the matrix
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Background 57nGiven a function ft (
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Background 592.3.2 Lyapunov Stabili
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Background 61as well as Jagannathan
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Background 63The subsequent example
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Background 65Evaluating this along
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Background 67Now, select the feedba
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Background 69is SISL if and only if
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Background 71L 1 (x)L(x, t)L 0 (x)0
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Background 73for some R > 0 such th
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Background 75Evaluating the first d
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Background 77Section 2.4Problem 2.4
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7Distributed Fair Scheduling in Wir
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Distributed Fair Scheduling in Wire
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8Optimized Energy and Delay-Based R
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Wireless Ad Hoc and Sensor Networks

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