Quantitative Comparison of the Efficiency and Scalability of the Current and Future LTE Network Architectures

Table 4

Performance metrics.

Symbol	Definition
ALDPD	Average latency of data packet delivery
ACDPD	Average processing cost of data packet delivery
ALAP	Average latency of initial attachment procedure
CAP	Processing cost of initial attachment procedure
ALHP	Average latency of handover procedure
ACHP	Average processing cost of handover procedure
LR	Load of routers
LNL	Load of network links
	Control messages load (number)
	Control messages load (size)