Device for supporting on/off of small base station in wireless communication network

A wireless communication system comprising:

• a plurality of access points (APs);
• a plurality of user equipments (UEs);
• and
• a macro cell,
• wherein the macro cell is configured to receive feedback including a first matrix comprising connection information between identifiers of the plurality of APs and the plurality of UEs, generate a second matrix including information on a specific AP to be activated, the specific AP being determined on the basis of the first matrix, and broadcast the generated second matrix, and
• wherein the specific AP is determined by an Equation A for maximizing throughput,
• [Equation A]
• max.
• ∑
• j
• ⁢
• ∑
• i
• ⁢
• A
• ij
• ⁢
• S
• ij
• S
• j
• -
• η
• ⁢
• ∑
• j
• ⁢
• P
• j
• ×
• 1
• ⁢
• (
• S
• j
• )
• ,
• where, i is an index of UE, j is an index of AP, Aij is a value corresponding to the index of the UE and the index of the AP in the first matrix, Sij is a value corresponding to the index of the UE and the index of the AP in the second matrix,
• 1
• ⁢
• (
• S
• j
• )
• ∷
• =
• {
• 1
• ,
• if
• ⁢
• ⁢
• S
• j
• >
• 0
• 0
• ,
• if
• ⁢
• ⁢
• S
• j
• =
• 0
• ,
• Sj=Σi=1ISij, (in this case, I is the number of all UEs), ε[0,∞) is a tradeoff parameter between a transport speed and energy consumption, and Pj is a power consumed by a small AP(j).