IEEE 802.21 enabled mobile terminals for optimized WLAN/3G handovers: a case study
ACM SIGMOBILE Mobile Computing and Communications Review
On topology creation for an indoor wireless grid
Proceedings of the third ACM international workshop on Wireless network testbeds, experimental evaluation and characterization
Mapping link SNRs of real-world wireless networks onto an indoor testbed
IEEE Transactions on Wireless Communications
The effect of an enhanced channel assignment algorithm on an IEEE 802.11 WLAN
WSEAS TRANSACTIONS on COMMUNICATIONS
Link gain matrix estimation in distributed large-scale wireless networks
EURASIP Journal on Wireless Communications and Networking - Special issue on simulators and experimental testbeds design and development for wireless networks
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To facilitate a broad range of experimental research on novel protocols and application concepts, we consider an indoor wireless testbed to emulate the performance of real-world networks. A fundamental issue for emulation is the replication of communication links of specified quality. In particular, we need to replicate on the testbed, for every link in the real world, a communication link whose received signal-to-interference-and-noise-ratio (SINR) matches the corresponding link signal-to-noise-ratio (SNR). In this paper, we focus on the downlink SNR mapping associated with a network with a single access point (AP). Fourindoor wireless propagation models (commercial buildings with/without line-of-sight path and residential buildings with/without line-of-sight path) and two types of spatial distributions (uniform distribution inside a circular cell and uniform distribution along a line) have been investigated. Based on the characteristics of the indoor testbed, we propose a mapping method with one AP and one interferer, which separates the task into two phases: In the first phase, the best location and transmission power for the interferer node are determined; in the second phase, the topology of receiver nodes is configured by a minimum weight matching algorithm. Through analysis and simulations, we find that when the interferer node is located on the corner across from the AP, we can achieve a mapping range on the order of 57dB and an average root-mean-square (RMS) mapping error less than 1 dB.