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Energy efficient reliable communication over unpredictable wireless medium is a major challenge for resource constrained wireless sensor network. The paper quantitatively evaluates the energy level performance of CDMA wireless sensor networks (WSN) using BCH code based hybrid ARQ-type II and compares it with ARQ for successful transmission of a fixed length packet. The effects of several network parameters...
This paper evaluates energy level performance of error control strategies in Wireless Sensor Networks (WSNs). More precisely Forward Error Correcting (FEC) and Automatic Repeat Request (ARQ) technique are studied for a square grid WSN. ARQ scheme is compared with FEC scheme in terms of Packet Error Rate (PER), energy efficiency and total energy spent to communicate packetized data. The impact of node...
This paper evaluates the end-to-end performance of a CDMA based static multi-hop wireless sensor network (WSN) in shadowed environment with correlated interferers. Two different information delivery mechanisms are studied using regenerative relays with or without error correction capability. Optimal packet sizes, based on energy efficiency, are estimated for both schemes under several network conditions...
This paper evaluates energy level performance of three packet delivery schemes in a Wireless Sensor Networks (WSN) in presence of Rayleigh fading. Three different information delivery mechanisms are investigated using regenerative relays with or without error correction capability. Energy consumption for successful delivery of a data packet for each mechanism is evaluated and compared under several...
Performance of a packetized data transmission in cellular CDMA is analyzed in presence of soft handoff and truncated power control. The combined effects of soft handoff parameters, truncated power control at physical layer and truncated ARQ at data link layer on throughput and delay performance of packet data under a prescribed delay constrain is studied. Truncated power control improves the performance...
This paper analyzes an adaptive processing gain based data transmission in cellular CDMA where processing gain is allocated depending on traffic intensity based on a constraint on bit error rate. Truncated automatic repeat request (T-ARQ) is used at link layer to satisfy a prescribed delay constraint. Effects of correlation among signal and interferers are included in the study. The impact of processing...
An adaptive data transmission scheme based on variable spreading gain (VSG) is studied in CDMA network in presence of soft handoff and space diversity. The processing gain is varied according to traffic intensity meeting a requirement on bit error rate (BER) at the output of a space diversity system provided by antenna array. Truncated automatic repeat request (T-ARQ) is used in link layer to further...
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