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Table 1 The Interfering sets of a typical user

From: Multichannel analysis of soft frequency reuse and user association in two-tier heterogeneous cellular networks

User type

Interfering sets

Macro interior user (\(u\ \epsilon \ \mathcal {U}^{\text {i}}_{1}\))

Ξ1i,Ξ2e

Macro edge user (\(u\ \epsilon \ \mathcal {U}^{\text {e}}_{1}\))

Ξ1e,Ξ2i

Pico interior user (\(u\ \epsilon \ \mathcal {U}^{\text {i}}_{2}\))

Ξ1e,Ξ2i

Pico edge user (\(u\ \epsilon \ \mathcal {U}^{\text {e}}_{2}\))

Ξ1i,Ξ2e