2015
Yi, Jiazi; Fuertes, Juan; Clausen, Thomas
Jitter Consideration for Reactive Protocols in Mobile Ad Hoc Networks (MANETs) Miscellaneous
2015.
Links | BibTeX | Tags: ietf-id, jitter, loadng, reactive protocol
@misc{yi_jitter,
title = {Jitter Consideration for Reactive Protocols in Mobile Ad Hoc Networks (MANETs)},
author = {Jiazi Yi and Juan Fuertes and Thomas Clausen},
url = {https://tools.ietf.org/html/draft-yi-manet-reactive-jitter-04},
year = {2015},
date = {2015-01-09},
urldate = {2015-11-20},
keywords = {ietf-id, jitter, loadng, reactive protocol},
pubstate = {published},
tppubtype = {misc}
}
2014
Cordero, Juan Antonio; Yi, Jiazi; Clausen, Thomas
An adaptive jitter mechanism for reactive route discovery in sensor networks Journal Article
In: Sensors, vol. 14, no. 8, pp. 14440–14471, 2014.
Abstract | Links | BibTeX | Tags: jitter, lln, sogrid
@article{cordero_adaptive_2014,
title = {An adaptive jitter mechanism for reactive route discovery in sensor networks},
author = {Juan Antonio Cordero and Jiazi Yi and Thomas Clausen},
url = {http://jiaziyi.com/wp-content/uploads/2016/08/An-Adaptive-Jitter-Mechanism-for-Reactive-Route-Discovery-in-Sensor-Networks.pdf
http://www.mdpi.com/1424-8220/14/8/14440/htm},
year = {2014},
date = {2014-08-08},
urldate = {2015-11-20},
journal = {Sensors},
volume = {14},
number = {8},
pages = {14440--14471},
abstract = {This paper analyses the impact of jitter when applied to route discovery in reactive (on-demand) routing protocols. In multi-hop non-synchronized wireless networks, jitter—a small, random variation in the timing of message emission—is commonly employed, as a means to avoid collisions of simultaneous transmissions by adjacent routers over the same channel. In a reactive routing protocol for sensor and ad hoc networks, jitter is recommended during the route discovery process, specifically, during the network-wide flooding of route request messages, in order to avoid collisions. Commonly, a simple uniform jitter is recommended. Alas, this is not without drawbacks: when applying uniform jitter to the route discovery process, an effect called delay inversion is observed. This paper, first, studies and quantifies this delay inversion effect. Second, this paper proposes an adaptive jitter mechanism, designed to alleviate the delay inversion effect and thereby to reduce the route discovery overhead and (ultimately) allow the routing protocol to find more optimal paths, as compared to uniform jitter. This paper presents both analytical and simulation studies, showing that the proposed adaptive jitter can effectively decrease the cost of route discovery and increase the path quality.},
keywords = {jitter, lln, sogrid},
pubstate = {published},
tppubtype = {article}
}
This paper analyses the impact of jitter when applied to route discovery in reactive (on-demand) routing protocols. In multi-hop non-synchronized wireless networks, jitter—a small, random variation in the timing of message emission—is commonly employed, as a means to avoid collisions of simultaneous transmissions by adjacent routers over the same channel. In a reactive routing protocol for sensor and ad hoc networks, jitter is recommended during the route discovery process, specifically, during the network-wide flooding of route request messages, in order to avoid collisions. Commonly, a simple uniform jitter is recommended. Alas, this is not without drawbacks: when applying uniform jitter to the route discovery process, an effect called delay inversion is observed. This paper, first, studies and quantifies this delay inversion effect. Second, this paper proposes an adaptive jitter mechanism, designed to alleviate the delay inversion effect and thereby to reduce the route discovery overhead and (ultimately) allow the routing protocol to find more optimal paths, as compared to uniform jitter. This paper presents both analytical and simulation studies, showing that the proposed adaptive jitter can effectively decrease the cost of route discovery and increase the path quality.
2013
Yi, Jiazi; Cordero, Juan Antonio; Clausen, Thomas
Jitter Considerations in On-demand Route Discovery for Mobile Ad Hoc Networks Proceedings Article
In: The 16th International Conference on Network-Based Information Systems (NBiS-2013), 2013.
Abstract | Links | BibTeX | Tags: Ad-Hoc, jitter, loadng, MANET, MESH, Sensor Networks, sogrid
@inproceedings{Clausen2013g,
title = {Jitter Considerations in On-demand Route Discovery for Mobile Ad Hoc Networks},
author = {Jiazi Yi and Juan Antonio Cordero and Thomas Clausen},
url = {http://jiaziyi.com/wp-content/uploads/2016/08/Jitter-Considerations-in-On-Demand-Route-Discovery-for-Mobile-Ad-Hoc-Networks.pdf
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6685393},
doi = {10.1109/NBiS.2013.28},
year = {2013},
date = {2013-09-01},
publisher = {The 16th International Conference on Network-Based Information Systems (NBiS-2013)},
abstract = {Jittering (a small, random variation in timing of control message emission) is widely used in protocols for wireless communication, in order to avoid simultaneous packet transmis- sions over the same channel by adjacent nodes in the network. Used for both regularly scheduled packets, for event-triggered packets, and for scheduled resets in the network, jittering is a particularly important mechanism when a network event may cause multiple adjacent nodes to react concurrently. Introduced in the proactive MANET routing protocol OLSR, the “LLN On-demand Ad hoc Distance-vector Routing Protocol - Next Generation” (LOADng), a derivative of AODV, is specified so as to also use jitter for flooding Route Request (RREQ) messages during route discovery. This use of jitter in RREQ flooding is, however, not without drawbacks, which are identified and addressed in this paper within the framework of a more general study of jitter mechanisms used for route discovery in reactive routing protocols. The paper studies the behavior of route discovery when using “naive” jitter (simply, delaying RREQ retransmission by a small uniformly distributed random delay), in order to identify and analyze the problems hereof, mostly related to route sub-optimality and excessive control traffic overhead. A Window Jitter mechanism is then proposed to address these issues – with the performance hereof, when compared to “naive” jitter being evaluated by way of modeling, theoretical analysis and experiments. The paper shows that the use of Window Jitter improves indeed the efficiency of route discovery in AODV and overcome the drawbacks identified for “naive” jitter.},
keywords = {Ad-Hoc, jitter, loadng, MANET, MESH, Sensor Networks, sogrid},
pubstate = {published},
tppubtype = {inproceedings}
}
Jittering (a small, random variation in timing of control message emission) is widely used in protocols for wireless communication, in order to avoid simultaneous packet transmis- sions over the same channel by adjacent nodes in the network. Used for both regularly scheduled packets, for event-triggered packets, and for scheduled resets in the network, jittering is a particularly important mechanism when a network event may cause multiple adjacent nodes to react concurrently. Introduced in the proactive MANET routing protocol OLSR, the “LLN On-demand Ad hoc Distance-vector Routing Protocol - Next Generation” (LOADng), a derivative of AODV, is specified so as to also use jitter for flooding Route Request (RREQ) messages during route discovery. This use of jitter in RREQ flooding is, however, not without drawbacks, which are identified and addressed in this paper within the framework of a more general study of jitter mechanisms used for route discovery in reactive routing protocols. The paper studies the behavior of route discovery when using “naive” jitter (simply, delaying RREQ retransmission by a small uniformly distributed random delay), in order to identify and analyze the problems hereof, mostly related to route sub-optimality and excessive control traffic overhead. A Window Jitter mechanism is then proposed to address these issues – with the performance hereof, when compared to “naive” jitter being evaluated by way of modeling, theoretical analysis and experiments. The paper shows that the use of Window Jitter improves indeed the efficiency of route discovery in AODV and overcome the drawbacks identified for “naive” jitter.
Cordero, Juan Antonio; Yi, Jiazi; Clausen, Thomas
Optimization of jitter configuration for reactive route discovery in wireless mesh networks Proceedings Article
In: 2013 11th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt), , IEEE , 2013, ISBN: 978-1-61284-824-2.
Abstract | Links | BibTeX | Tags: Ad-Hoc, jitter, loadng, MANET, MESH, Sensor Networks
@inproceedings{Clausen2013c,
title = {Optimization of jitter configuration for reactive route discovery in wireless mesh networks},
author = {Juan Antonio Cordero and Jiazi Yi and Thomas Clausen},
url = {http://jiaziyi.com/wp-content/uploads/2016/08/Optimization-of-jitter-configuration-for-reactive-route-discovery-in-wireless-mesh-networks.pdf
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6576467},
isbn = {978-1-61284-824-2},
year = {2013},
date = {2013-05-01},
booktitle = {2013 11th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt), },
publisher = {IEEE },
abstract = {Jitter is a small, random variation of timing before message emission that is widely used in non-synchronized wireless communication. It is employed to avoid collisions caused by simultaneous transmissions by adjacent nodes over the same channel. In reactive (on-demand) routing protocols, such as AODV and LOADng, it is recommended to use jitter during the flooding of Route Request messages. This paper analyzes the cost of jitter mechanisms in route discovery of on-demand routing protocols, and examines the drawbacks of the standard and commonly used uniformly distributed jitter. The main studied drawback is denominated delay inversion effect. Two variations on the jitter mechanism --window jitter and adaptive jitter-- are proposed to address this effect, which take the presence and the quality of traversed links into consideration to determine the per-hop forwarding delay. These variations allow to effectively reduce the routing overhead, and increase the quality of the computed paths with respect to the standard uniform jitter mechanism. Simulations are also performed to compare the performance of different jitter settings in various network scenarios.},
keywords = {Ad-Hoc, jitter, loadng, MANET, MESH, Sensor Networks},
pubstate = {published},
tppubtype = {inproceedings}
}
Jitter is a small, random variation of timing before message emission that is widely used in non-synchronized wireless communication. It is employed to avoid collisions caused by simultaneous transmissions by adjacent nodes over the same channel. In reactive (on-demand) routing protocols, such as AODV and LOADng, it is recommended to use jitter during the flooding of Route Request messages. This paper analyzes the cost of jitter mechanisms in route discovery of on-demand routing protocols, and examines the drawbacks of the standard and commonly used uniformly distributed jitter. The main studied drawback is denominated delay inversion effect. Two variations on the jitter mechanism --window jitter and adaptive jitter-- are proposed to address this effect, which take the presence and the quality of traversed links into consideration to determine the per-hop forwarding delay. These variations allow to effectively reduce the routing overhead, and increase the quality of the computed paths with respect to the standard uniform jitter mechanism. Simulations are also performed to compare the performance of different jitter settings in various network scenarios.