This technology is a link asymmetry calculation device and method for Virtual Multiple-Input Single-Output (VMISO) links. It calculates link asymmetry using a power correlation coefficient if the distance between two neighboring cooperative transmission clusters divided by the first cluster radius is below a threshold, or using a power ratio if it exceeds the threshold.
While cooperative transmission allows distributed nodes to form a virtual antenna array to mitigate fading, link asymmetry—where link quality differs between transmission and reception directions—has historically degraded routing performance. Existing SISO-based analysis has been limited in its ability to accurately measure the asymmetry of VMISO links involving multiple nodes according to cluster deployment conditions.
This technology applies different formulas based on inter-cluster distance conditions to precisely calculate VMISO link asymmetry. If the threshold is exceeded, it calculates the number of additional transmission nodes required and requests an expansion via an administrator terminal. Applicable to wireless sensor networks, multi-hop wireless networks, and mobile ad-hoc network design, it enables evidence-based balancing of bidirectional quality in cooperative transmission links.
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