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Table 1 Important notation

From: Optimization of WLAN associations considering handover costs

Symbol

Description

Type

S

Set of STAs

Parameter

A

Set of APs

Parameter

I

Set of interfering links

Parameter

T

Set of time slots

Parameter

(a,s)

Link between AP a and STA s

Parameter

p (a,s)

PHY rate rate on link (a,s)

Parameter

u s (t)

Usage indicator, 1 if an STA s would like to download in slot t

Parameter

D

Handover cost

Parameter

b a

Capacity of the wired link of AP a

Parameter

r (a,s)

Download rate on link (a,s)

Variable

c (a,s)

Binary selection variable if link (a,s) is used

Variable