Radio link quality estimation in wireless sensor networks: A survey

ACM Transactions on Sensor Networks

Volumn 8, Issue 4, 2012, Pages

  Baccour, Nouha ^a   Koubaa, Anis ^b   Mottola, Luca ^c   Zuniga, Marco Antonio ^d   Youssef, Habib ^e   Boano, Carlo Alberto ^f   Alves, Mario ^a  

^a POLYTECHNIC INSTITUTE OF PORTO   (Portugal)

^b AL IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY IMSIU   (Saudi Arabia)

^c SWEDISH INSTITUTE OF COMPUTER SCIENCE   (Sweden)

^d UNIVERSITY OF DUISBURG ESSEN   (Germany)

^e UNIVERSITY OF SOUSSE   (Tunisia)

^f UNIVERSITY OF LÜBECK   (Germany)

Author keywords

Link characteristics; Link quality estimation; Low power links; Wireless sensor networks

Indexed keywords

FUNDAMENTAL CONCEPTS; HIGHER-LAYER PROTOCOLS; LINK CHARACTERISTICS; LINK QUALITY; LOW-POWER LINKS; PERFORMANCE ANALYSIS; RADIO LINK QUALITY; SYSTEM DESIGNERS;

NETWORK PERFORMANCE; RADIO LINKS; SURVEYS; WIRELESS SENSOR NETWORKS;

ESTIMATION;

EID: 84865016804     PISSN: 15504859     EISSN: 15504867     Source Type: Journal    
DOI: 10.1145/2240116.2240123     Document Type: Review

References (93)

1. AGUAYO, D., BICKET, J., BISWAS, S., JUDD, G., AND MORRIS, R. 2004. Link-level measurements from an 802.11b mesh network. SIGCOMM Comput. Comm. Rev. 34, 4, 121-132.
2. BACCOUR, N.,KOUB○AA, A.,BEN JAMAA,M.,YOUSSEF,H.,ZUNIGA,M., AND ALVES,M. 2009. A comparative simulation study of link quality estimators in wireless sensor networks. In Proceedings of the 17th IEEE/ACM International Symposium on Modelling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS '09). IEEE, 301-310.
3. BACCOUR, N.,KOUB○AA, A., JAMAA, M. B., DO ROŚARIO, D., YOUSSEF, H.,ALVES, M., AND BECKER, L. B. 2011. Radiale: A framework for designing and assessing link quality estimators in wireless sensor networks. Ad Hoc Netw. 9, 7, 1165-1185.
4. BACCOUR, N., KOUB○AA, A., YOUSSEF, H., BEN JAMAA, M., DO ROŚARIO, D., ALVES, M., AND B. BECKER, L. 2010. F-LQE: A fuzzy link quality estimator for wireless sensor networks. In Proceedings of the 7th European Conference on Wireless Sensor Networks (EWSN'10). Springer, 240-255.
5. BANNISTER, K., GIORGETTI, G., AND GUPTA, S. K. 2008. Wireless sensor networking for hot applications: Effects of temperature on signal strength, data collection and localization. In Proceedings of the 5th Workshop on Embedded Networked Sensors (HotEmNets'08).
6. BOANO, C. A., BROWN, J., TSIFTES, N., ROEDIG, U., AND VOIGT, T. 2010a. The impact of temperature on outdoor industrial sensornet applications. IEEE Trans. Industr. Inf. 6, 3, 451-459.
7. BOANO, C. A.,VOIGT, T.,DUNKELS, A.,OSTERLIND, F.,TSIFTES, N.,MOTTOLA, L., AND SUAREZ, P. 2009. Poster abstract: Exploiting the LQI variance for rapid channel quality assessment. In Proceedings of the International Conference on Information Processing in Sensor Networks (IPSN '09). IEEE Computer Society, 369-370.
8. BOANO, C. A.,VOIGT, T.,NODA, C.,ROMER, K., AND ŹUNIGA, M. A. 2011. JamLab: Augmenting sensornet testbeds with realistic and controlled interference generation. In Proceedings of the 10th International Conference on Information Processing in Sensor Networks (IPSN '11). ACM Press, 175-186.
9. BOANO, C. A., VOIGT, T., TSIFTES, N.,MOTTOLA, L., ROMER, K., AND ŹUNIGA, M. A. 2010b. Making sensornet MAC protocols robust against interference. In Proceedings of the 7th European Conference on Wireless Sensor Networks (EWSN '10). Springer, 272-288.
10. BOANO, C. A., ZUNIGA, M., VOIGT, T., WILLIG, A., AND ROMER, K. 2010c. The triangle metric: Fast link quality estimation for mobile wireless sensor networks. In Proceedings of the 19th International Conference on Computer Communications and Networks (ICCCN '10). IEEE, 1-7.
11. BROWN, J.,MCCARTHY, B., ROEDIG, U., VOIGT, T., AND SREENAN, C. J. 2011. Burstprobe: Debugging time-critical data delivery in wireless sensor networks. In Proceedings of the 8th European Conference on Wireless Sensor Networks (EWSN '11). Springer, 195-210.
12. BTNODE. www.btnode.ethz.ch.
13. CERPA, A., BUSEK, N., AND ESTRIN, D. 2003. Scale: A tool for simple connectivity assessment in lossy environments. Tech. rep.
14. CERPA, A. AND ESTRIN, D. 2004. ASCENT: Adaptive self-configuring sensor networks topologies. IEEE Trans. Mobile Comput. 3, 3, 272-285.
15. CERPA, A., WONG, J. L., KUANG, L., POTKONJAK, M., AND ESTRIN, D. 2005a. Statistical model of lossy links in wireless sensor networks. In Proceedings of the 4th International Symposium on Information Processing in Sensor Networks (IPSN '05). IEEE Press, 81-88. (Pubitemid 43841218)
16. CERPA, A.,WONG, J. L., POTKONJAK, M., AND ESTRIN, D. 2005b. Temporal properties of low power wireless links: Modeling and implications on multihop routing. In Proceedings of the 6th International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc '05). ACM, 414-425. (Pubitemid 43037615)
17. CHIPCON AS. 2007. CC2420 datasheet - 2.4 GHz IEEE 802.15.4/ZigBee-Ready RF Transceiver (Rev. B). Chipcon AS.
18. CHOWDHURY, K. R. AND AKYILDIZ, I. F. 2009. Interferer classification, channel selection and transmission adaptation for wireless sensor networks. In Proceedings of the International Conference on Communication (ICC '09). IEEE, 1-5.
19. COUTO, D. S. J. D., AGUAYO, D., BICKET, J., AND MORRIS, R. 2003. A high-throughput path metric for multihop wireless routing. In Proceedings of the 9th Annual International Conference on Mobile Computing and Networking (MobiCom '03). ACM, 134-146.
20. DUTTA, P., DAWSON-HAGGERTY, S., CHEN, Y., LIANG, C.-J. M., AND TERZIS, A. 2010. Design and evaluation of a versatile and efficient receiver-initiated link layer for low-power wireless. In Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems (SenSys '10). ACM, 1-14.
21. DYER, M., BEUTEL, J., THIELE, L., KALT, T., OEHEN, P., MARTIN, K., AND BLUM, P. 2007. Deployment support network - A toolkit for the development of WSNs. In Proceedings of the 4th European Conference on Wireless Sensor Networks (EWSN '07). Springer, 195-211.
22. FAIRHURST, G. AND WOOD, L. 2002. Rfc 3366 : Advice to link designers on link automatic repeat request (arq). Tech. rep.
23. FONSECA, R., GNAWALI, O., JAMIESON, K., AND LEVIS, P. 2007. Four bit wireless link estimation. In Proceedings of the 6th International Workshop on Hot Topics in Networks (HotNets VI). ACM SIGCOMM.
24. GANESAN, D., KRISHNAMACHARI, B.,WOO, A., CULLER, D., ESTRIN, D., AND WICKER, S. 2002. Complex behavior at scale: An experimental study of low-power wireless sensor networks. Tech. rep.
25. GNAWALI, O., FONSECA, R., JAMIESON, K.,MOSS, D., AND LEVIS, P. 2009. Collection tree protocol. In Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems (SenSys '09). ACM, 90-100.
26. GOLDSMITH, A. 2005. Wireless Communications. Cambridge University Press.
27. GOMEZ, C.,BOIX, A., AND PARADELLS, J. 2010. Impact of LQI-based routing metrics on the performance of a oneto-one routing protocol for IEEE 802.15.4 multihop networks. EURASIP J. Wirel. Comm. Netw. 2010, 6:1-6:20.
28. GOYAL, M. 2010. Mechanisms to support point-to-point routing in low power and lossy networks. Tech. rep.
29. HUANG, G. J., XING, G., ZHOU, G., AND ZHOU, R. 2010. Beyond co-existence: Exploiting WiFi white space for Zigbee performance assurance. In Proceedings of the 18th IEEE International Conference on Network Protocols (ICNP '10). IEEE, 305-314.
30. IEEE 802.15.4 STANDARD. 2003. http://standards.ieee.org/getieee802/ download/802.15.4-2003.pdf.
31. INCEL, O. D., DULMAN, S., JANSEN, P., AND MULLENDER, S. 2006. MultiChannel interference measurements for wireless sensor networks. In Proceedings of the 31th International Conference on Communications. IEEE, 694-701.
32. IYER, V.,WOEHRLE, M., AND LANGENDOEN, K. Chrysso: A multichannel approach to mitigate external interference 2011. In Proceedings of the 8th Communication Society Conference on Sensor, Mesh, and Ad Hoc Communications and Networks (SECON '11).
33. JIANG, P., HUANG, Q., WANG, J., DAI, X., AND LIN, R. 2006. Research on wireless sensor networks routing protocol for wetland water environment monitoring. In Proceedings of the 1st International Conference on Innovative Computing, Information and Control (ICICIC '06). IEEE, 251-254.
34. KIM, E., KASPAR, D., GOMEZ, C., AND BORMANN, C. 2009. Problem statement and requirements for 6lowpan routing. Tech. rep. draft-ietf-6lowpan-routing- requirements-04.
35. KIM, K.-H. AND SHIN, K. G. 2006. On accurate measurement of link quality in multihop wireless mesh networks. In Proceedings of the 12th Annual International Conference on Mobile Computing and Networking (MobiCom '06). ACM, 38-49. (Pubitemid 44758702)
36. KIM, M. AND NOBLE, B. 2001. Mobile network estimation. In Proceedings of the 7th Annual International Conference on Mobile Computing and Networking (MobiCom '01). ACM, 298-309. (Pubitemid 33006724)
37. KOKSAL, C. AND BALAKRISHNAN, H. 2006. Quality-aware routing in time-varying wireless networks. IEEE J. Select. Areas Comm. 24, 11, 1984-1994. (Pubitemid 44711703)
38. KOTZ, D., NEWPORT, C., AND ELLIOTT, C. 2003. The mistaken axioms of wireless-network research. Tech. rep., Dartmouth College.
39. LAL, D.,MANJESHWAR, A., AND HERRMANN, F. 2003. Measurement and characterization of link quality metrics in energy constrained wireless sensor networks. In Proceedings of the IEEE Global Telecommunications Conference (Globecom '03). IEEE, 446-452.
40. LEE, H., CERPA, A., AND LEVIS, P. 2007. Improving wireless simulation through noise modeling. In Proceedings of the 6th International Conference on Information Processing in Sensor Networks (IPSN '07). ACM, 21-30. (Pubitemid 47582132)
41. LI, Y., CHEN, J., LIN, R., AND WANG, Z. 2005. A reliable routing protocol design for wireless sensor networks. In Proceedings of the IEEE International Conference on Mobile Adhoc and Sensor Systems (MASS '05). IEEE, 61-65.
42. LIANG, C.-J. M., PRIYANTHA, N. B., LIU, J., AND TERZIS, A. 2010. Surviving wi-fi interference in low power zigbee networks. In Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems (SenSys'10). ACM, 309-322.
43. LIM, G. 2002. Link stability and route lifetime in ad-hoc wireless networks. In Proceedings of the International Conference on Parallel Processing Workshops (ICPPW '02). IEEE, 116.
44. LIN, S., ZHANG, J., ZHOU, G., GU, L., STANKOVIC, J. A., AND HE, T. 2006. Atpc: Adaptive transmission power control for wireless sensor networks. In Proceedings of the 4th International Conference on Embedded Networked Sensor Systems (SenSys '06). ACM, 223-236. (Pubitemid 47168689)
45. LIN, S., ZHOU, G., WHITEHOUSE, K., WU, Y., STANKOVIC, J. A., AND HE, T. 2009. Towards stable network performance in wireless sensor networks (RTSS '09). In Proceedings of the 30th IEEE Real-Time Systems Symposium. IEEE, 227-237.
46. LIU, H., LI, J., XIE, Z., LIN, S., WHITEHOUSE, K., STANKOVIC, J. A., AND SIU, D. 2010. Automatic and robust breadcrumb system deployment for indoor firefighter applications. In Proceedings of the 8th International Conference on Mobile Systems, Applications, and Services (MobiSys '10). ACM, 21-34.
47. LYMBEROPOULOS, D., LINDSEY, Q., AND SAVVIDES, A. 2006. A.: An empirical characterization of radio signal strength variability in 3-d ieee 802.15.4 networks using monopole antennas. In Proceedings of the 7th European Conference on Wireless Sensor Networks (EWSN' 10). Springer, 326-341. (Pubitemid 43978624)
48. MOTTOLA, L., PICCO, G. P., CERIOTTI, M., GUN¡A, C., AND MURPHY, A. L. 2010. Not all wireless sensor networks are created equal: A comparative study on tunnels. ACM Trans. Sen. Netw. 7, 15:1-15:33.
49. MUNIR, S., LIN, S., HOQUE, E., NIRJON, S. M. S., STANKOVIC, J. A., AND WHITEHOUSE, K. 2010. Locationing burstiness for reliable communication and latency bound generation in wireless sensor networks. In Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN '10). ACM, 303-314.
50. MUSALOIU-E., R. AND TERZIS, A. 2007. Minimising the effect of WiFi interference in 802.15.4 wireless sensor networks. Int. J. Sensor Netw. 3, 1, 43-54.
51. NODA, C., PRABH, S., BOANO, C. A., VOIGT, T., AND ALVES, M. 2011. Poster abstract: A channel quality metric for interference-aware wireless sensor networks. In Proceedings of the International Conference on Information Processing in Sensor Networks (IPSN '11). IEEE, 167-168.
52. PETROVA,M.,WU, L.,MAHONEN, P., AND RIIHIJARVI, J. 2007. Interference measurements on performance degradation between colocated ieee 802.11g/n and ieee 802.15.4 networks. In Proceedings of the 6th International Conference on Networking. IEEE, 93-.
53. POLASTRE, J., SZEWCZYK, R., AND CULLER, D. 2005. Telos: Enabling ultra-low power wireless research. In Proceedings of the 4th International Symposium on Information Processing in Sensor Networks (IPSN'05). IEEE Press, 364-369. (Pubitemid 43841255)
54. PUCCINELLI, D. AND HAENGGI,M. 2008. DUCHY: Double cost field hybrid link estimation for low-power wireless sensor networks. In Proceedings of the 5th Workshop on Embedded Networked Sensors (Hot EmNets'08). ACM.
55. PUCCINELLI, D. AND HAENGGI, M. 2010. Reliable data delivery in large-scale low-power sensor networks. ACM Trans. Sen. Netw. 6, 4, 1-41.
56. RAMAN, B. AND CHEBROLU, K. 2008. Censor networks: A critique of "sensor networks" from a systems perspective. SIGCOMM Comput. Comm. Rev. 38, 75-78.
57. RAMAN, B., CHEBROLU, K., MADABHUSHI, N., GOKHALE, D. Y., VALIVETI, P. K., AND JAIN, D. 2006. Implications of link range and (in)stability on sensor network architecture. In Proceedings of the 1st International Workshop on Wireless Network Ttestbeds, Experimental Evaluation & Characterization (WiNTECH '06). ACM, 65-72. (Pubitemid 46634382)
58. RAPPAPPORT, T. S. 2001. Wireless Communications: Principles and Practice. Prentice Hall.
59. REIJERS, N.,HALKES, G., AND LANGENDOEN, K. 2004. Link layer measurements in sensor networks. In Proceedings of the 1st IEEE Internationall Conference on Mobile Ad-hoc and Sensor Systems (MASS '04). IEEE, 24-27.
60. RONDINONE, M., ANSARI, J., RIIHIJARVI, J., AND MAHONEN, P. 2008. Designing a reliable and stable link quality metric for wireless sensor networks. In Proceedings of the Workshop on Real-World Wireless Sensor Networks (RealWSN '08). 6-10.
61. SEADA, K., ZUNIGA, M., HELMY, A., AND KRISHNAMACHARI, B. 2004. Energy-Efficient forwarding strategies for geographic routing in lossy wireless sensor networks. In Proceedings of the 2nd International Conference on Embedded Networked Sensor Systems (SenSys '04). ACM, 108-121. (Pubitemid 41563353)
62. SENEL,M.,CHINTALAPUDI, K.,LAL, D.,KESHAVARZIAN, A., AND COYLE, E. J. 2007. AKalman filter based link quality estimation scheme for wireless sensor networks. In Proceedings of the IEEE Global Telecommunications Conference (GLOBECOM '07). IEEE, 875-880. (Pubitemid 351259157)
63. SHA, M., HACKMANN, G., AND LU, C. 2011. ARCH: Practical channel hopping for reliable home-area sensor networks. In Proceedings of the 17th Real-Time and Embedded Technology and Applications Symposium (RTAS '11). IEEE.
64. SIKORA, A. AND GROZA, V. F. 2005. Coexistence of IEEE 802.15.4 with other systems in the 2.4 GHz-ISM-band. In Proceedings of the IEEE Conference on Instrumentation and Measurement Technology. 1786-1791. (Pubitemid 46289521)
65. SON, D., KRISHNAMACHARI, B., AND HEIDEMANN, J. 2006. Experimental study of concurrent transmission in wireless sensor networks. In Proceedings of the 4th International Conference on Embedded Networked Sensor Systems (SenSys '06). ACM, 237-250. (Pubitemid 47168690)
66. SRINIVASAN, K., DUTTA, P., TAVAKOLI, A., AND LEVIS, P. 2006a. Understanding the causes of packet delivery success and failure in dense wireless sensor networks. In Proceedings of the 4th International Conference on Embedded Networked Sensor Systems (SenSys '06). ACM, 419-420. (Pubitemid 47168739)
67. SRINIVASAN, K., DUTTA, P., TAVAKOLI, A., AND LEVIS, P. 2010a. An empirical study of low-power wireless. ACM Trans. Sen. Netw. 6, 1-49.
68. SRINIVASAN, K., JAIN, M., CHOI, J. I., AZIM, T., KIM, E. S., LEVIS, P., AND KRISHNAMACHARI, B. 2010b. The κ factor: Inferring protocol performance using inter-link reception correlation. In Proceedings of the 16th Annual International Conference on Mobile Computing and Networking (MobiCom '10). ACM, 317-328.
69. SRINIVASAN, K., KAZANDJIEVA, M. A., AGARWAL, S., AND LEVIS, P. 2008. The â-factor: Measuring wireless link burstiness. In Proceedings of the 6th International Conference on Embedded Network Sensor Systems (SenSys '08). ACM, 29-42.
70. SRINIVASAN, K. AND LEVIS, P. 2006b. Rssi is under appreciated. In Proceedings of the 3rd InternationalWorkshop on Embedded Networked Sensors (EmNets'06).
71. TANG, L., SUN, Y., GUREWITZ, O., AND JOHNSON, D. B. 2011. EM-MAC: A dynamic multichannel energy-efficientt MAC protocol for wireless sensor networks. In Proceedings of the 12th ACM International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc '11). ACM.
72. TANG, L.,WANG, K.-C., HUANG, Y., AND GU, F. 2007. Channel characterization and link quality assessment of ieee 802.15.4-compliant radio for factory environments. IEEE Trans. Industr. Inf. 3, 2, 99-110. (Pubitemid 46861082)
73. THELEN, J., GOENSE, D., AND LANGENDOEN, K. 2005. Radio wave propagation in potato fields. In Proceedings of the 1st Workshop on Wireless Network Measurements.
74. TINYOS MULTIHOPLQI ROUTING ALGORITHM. 2004. http://www.tinyos.net/tinyos- 1.x/tos/lib/MultiHopLQI/.
75. TOSCANO, E. AND BELLO, L. L. 2008. Cross-Channel interference in IEEE 802.15.4 networks. In Proceedings of the 7th International Workshop on Factory Communication Systems (WFCS '08). 139-148.
76. WANG, Y.,MARTONOSI, M., AND PEH, L.-S. 2007. Predicting link quality using supervised learning in wireless sensor networks. ACM SIGMOBILE Mobile Comput. Comm. Rev. 11, 3, 71-83.
77. WERNER-ALLEN, G., LORINCZ, K., JOHNSON, J., LEES, J., AND WELSH, M. 2006. Fidelity and yield in a volcano monitoring sensor network. In Proceedings of the 7th Symposium on Operating Systems Design and Implementation (OSDI '06). USENIX Association, 381-396.
78. WOO, A. AND CULLER, D. 2003a. Evaluation of efficient link reliability estimators for low-power wireless networks. Tech. rep. UCB/CSD-03-1270, EECS Department, University of California, Berkeley.
79. WOO, A., TONG, T., AND CULLER, D. 2003. Taming the underlying challenges of reliable multihop routing in sensor networks. In Proceedings of the 1st International Conference on Embedded Networked Sensor Systems (SenSys '03). ACM, 14-27. (Pubitemid 40682331)
80. WU, Y.,STANKOVIC, J. A.,HE, T., AND LIN, S. 2008. Realistic and efficientmulti-channel communications in wireless sensor networks. In Proceedings of the 27th Conference on Computer Communications (INFOCOM '08). IEEE, 1193-1201.
81. XING, G., SHA, M., HUANG, J., ZHOU, G.,WANG, X., AND LIU, S. 2009. MultiChannel interference measurement and modeling in low-power wireless networks. In Proceedings of the 30th IEEE Real-Time Systems Symposium (RTSS '09). IEEE, 248-257.
82. XU, Y. AND LEE, W.-C. 2006. Exploring spatial correlation for link quality estimation in wireless sensor networks. In Proceedings of the 4th Annual IEEE International Conference on Pervasive Computing and Communication (PERCOM '06). IEEE Computer Society, 200-211.
83. YANG, D.,XU, Y., AND GIDLUND,M. 2010. Coexistence of IEEE802.15.4 based networks a survey. In Proceedings of the 36th Annual Conference on IEEE Industrial Electronics Society (IECON '10). IEEE, 2107-2113.
84. YUNQIAN, M. 2005. Improving wireless link delivery ratio classification with packet snr. In Proceedings of the International Conference on Electro Information Technology. IEEE, 6-12.
85. ZHANG, H., SANG, L., AND ARORA, A. 2008. Unravelling the subtleties of link estimation and routing in wireless sensor networks. Tech. rep.
86. ZHANG, H., SANG, L., AND ARORA, A. 2010. Comparison of data-driven link estimation methods in low-power wireless networks. IEEE Trans. Mobile Computing 9, 1634-1648.
87. ZHAO, J. AND GOVINDAN, R. 2003. Understanding packet delivery performance in dense wireless sensor networks. In Proceedings of the 1st International Conference on Embedded Networked Sensor Systems (SenSys '03). ACM, 1-13. (Pubitemid 40682330)
88. ZHOU, G., HE, T., KRISHNAMURTHY, S., AND STANKOVIC, J. A. 2004. Impact of radio irregularity on wireless sensor networks. In Proceedings of the 2nd International Conference on Mobile Systems, Applications, and Services (MobiSys '04). ACM, 125-138.
89. ZHOU, G., HE, T., KRISHNAMURTHY, S., AND STANKOVIC, J. A. 2006a. Models and solutions for radio irregularity in wireless sensor networks. ACM Trans. Sen. Netw. 2, 2, 221-262. (Pubitemid 44188495)
90. ZHOU, G.,HE, T., STANKOVIC, J. A., AND ABDELZAHER, T. 2005. Rid: Radio interference detection in wireless sensor networks. In Proceedings of the 24th Annual Joint Conference of the IEEE Computer and Communications Societies (INFOCOM '05). IEEE, 891-901. (Pubitemid 41390745)
91. ZHOU, G.,STANKOVIC, J. A., AND SON, S.H. 2006b. Crowded spectrum in wireless sensor networks. In Proceedings of the 3rd Workshop on Embedded Networked Sensors (EmNets '06).
92. ZUNIGA, M. AND KRISHNAMACHARI, B. 2004. Analyzing the transitional region in low power wireless links. In Proceedings of the 1st International Conference on Sensor and Ad Hoc Communications and Networks (SECON '04). IEEE, 517-526. (Pubitemid 40789315)
93. ZUNIGA, M. AND KRISHNAMACHARI, B. 2007. An analysis of unreliability and asymmetry in low-power wireless links. ACM Trans. Sen. Netw. 3, 2, 63-81.