Receiver-initiated busy-tone multiple access in packet radio networks
SIGCOMM '87 Proceedings of the ACM workshop on Frontiers in computer communications technology
Impact of channel models on simulation of large scale wireless networks
MSWiM '99 Proceedings of the 2nd ACM international workshop on Modeling, analysis and simulation of wireless and mobile systems
A new model for packet scheduling in multihop wireless networks
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Achieving MAC layer fairness in wireless packet networks
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Effects of wireless physical layer modeling in mobile ad hoc networks
MobiHoc '01 Proceedings of the 2nd ACM international symposium on Mobile ad hoc networking & computing
Ad-hoc On-Demand Distance Vector Routing
WMCSA '99 Proceedings of the Second IEEE Workshop on Mobile Computer Systems and Applications
Impact of interference on multi-hop wireless network performance
Proceedings of the 9th annual international conference on Mobile computing and networking
Experimental evaluation of wireless simulation assumptions
MSWiM '04 Proceedings of the 7th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
Wireless Communications & Mobile Computing - Medium Access Control Protocols for Wireless Ad Hoc Networks
The capacity of wireless networks
IEEE Transactions on Information Theory
Throughput-optimal configuration of fixed wireless networks
IEEE/ACM Transactions on Networking (TON)
Proceedings of the 2nd International Conference on Simulation Tools and Techniques
On the impact of far-away interference on evaluations of wireless multihop networks
Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
Joint Routing and Medium Access Control in Fixed Random Access Wireless Multihop Networks
IEEE/ACM Transactions on Networking (TON)
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In a wireline network, nodes form links with only those nodes they are wired to, and the links do not interfere with one another. In contrast, in a wireless network, signal transmissions are intrinsically broadcast, and suffer from mutual interference. In several physical layer technologies, a wireless signal is decoded by treating the sum of all the other on-going signal transmissions as noise. Hence, from a networking standpoint, there is a need to model wireless channel interference. An accurate interference model is especially important in a multi-hop network context, since there could be several simultaneous wireless transmissions. Several works in the literature have made use of simplified interference models. Some works assume a fixed range for communication and interference, while others are based on concepts like capture threshold where the desired signal strength is compared with interference from a single node at a time, rather than cumulatively. In particular, the latter model is used in ns2 which is the most common simulation tool. Under isotropic pathloss, the capture threshold model is also equivalent to the protocol model proposed by Gupta and Kumar, which is now the subject of a lot of analytical activity notably through conflict graph based problem formulations. We investigate the accuracy and appropriateness of the capture threshold based interference model, by comparing it with one based on the SINR (signal-to-interference-and-noise ratio) with additive interference calculation. We find that both in the case of random access networks, as well as in the case of scheduled networks (where node transmissions are scheduled to be completely conflict-free), a simplified interference model such as the capture threshold model, can produce significantly different results compared to an additive interference based model. Therefore, a lot of caution should be exercised before accepting or interpreting results based on simplified interference models.