From: Optimal power control and coverage management in two-tier femtocell networks
Primal-dual algorithm to solve PCC (P3): | |||
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Initialization | Set t=0 and equal to a non-negative value. | ||
Step | Operation | Input | Output |
1 | Solve ICPs at each cell considering the specific users’ utilities as well as the power vector , via the canonical dual algorithm in Section IV.A, deriving cell’s optimal utility vector, the normalized Lagrangian multiplier and users’ power vector for the specific . This implies a iterative algorithm. | U j ∀ j ∈ S j |
∀ c ∈ C |
2 | Each cell c dynamically updates its maximum transmission power pc,var(t + 1) in accordance to the gradient algorithm (23). This information is sent to the macro cell using existing 3GPP signaling. | a(t) | pc,var(t + 1) ∀ c ∈ C |
3 | Set t ← t + 1, disseminate , a(t) and go to step 1 (until satisfying termination criterion). Upon convergence, optimal CM and power control vector have been derived. |
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