<p> In wireless networks, the
desired signal of a specific user is typically an undesired interfering signal
for untended receivers. However, from
the perspective of an entire wireless network, the coexistence of useful
signals and interfering signals is unavoidable and often is beneficial in
throughput terms. The useful signals and
interfering signals are complementary.
They are in juxtaposition to each other in the context of a single
communication link, while they are in symbiosis within the framework of the
networks, which can be described by Chinese traditional culture symbol of “Yin”
and “Yang”. A wireless network having optimal performance must be a harmonious
network, where the interfering and useful signals harmoniously coexist in an
optimal balance. Interference management
plays the critical role in arriving at this optimal balance. </p>