An Access Selection Algorithm for Heterogeneous Wireless Networks Based on Optimal Resource Allocation

Table 1

Main symbols and their descriptions.

Symbol	Description
	Total number of RANs
	Total number of mobile users
	Bandwidth allocated by Network to User
	Total bandwidth resources of Network
	Transmission rate of User in Network
	Sum of transmission rates from User to User
	Transmission power of User in Network
	Minimum transmission rate requirement of User in Network
	Bandwidth resource state assignable to User
	When resource state is in , bandwidth allocation decision for User
	When resource state is in , optimal bandwidth allocation decision for User
	A set of bandwidth allocation decisions in User under state
	Bandwidth allocation policy from User to User
	Optimal bandwidth allocation policy from User to User
	Maximum value of sum of transmission rates from User to User