A Novel Cooperative Cache Policy for Wireless Networks

Table 2

The notations.

Symbol	Description
MBS	Macro base station
SBS	Small base station
BS	Base station
{MBS},{SBS}, {User}	The set of MBSs, SBSs, and users
MBSq, SBSw, and Usere	The ^th MBS, ^th SBS, and ^th user
SBS^q	The set of SBSs in the coverage area of MBSq
[User]q, [User]w	The set of users who are served by the ^th MBS and ^th SBS
	The connection status matrix
	Content library
	The set of the content size
UPF	The user plane function
	The interface between the radio access network and the UPF
	The interface between the UPF and the data network
CPP-CC	Our proposed cache policy
UPC	The uncollaborative predicted cache policy
CLFU	The collaborative reactive least frequently used cache policy
CLRU	The collaborative reactive least recently used cache policy