The Gateway Selection Based on Charging Characteristics feature enables the USN9810 to select a GGSN/P-GW based on charging
characteristics (CC). The USN9810 first adds CC information to the APN using APN customization and then sends the extended APN to the domain name server (DNS) to obtain the IP address of the Gatewa

Table 1 Benefits of this feature

For...	Benefits
Carriers	This feature enables the USN9810 to select a GGSN/P-GW that supports the prepaid mechanism when a GGSN/P-GW that does not support this mechanism is also deployed on the network.
Subscribers	None

Table 2 NEs involved in this feature (USN9810 as an SGSN)

UE	RNC	BSC	SGSN	GGSN	HLR
-	-	-	√	-	-

Table 3 NEs involved in this feature (USN9810 as an MME)

UE	eNodeB	S-GW	MME	HSS	P-GW
-	-	-	√	-	-

documentation very useful for my job

Does Gateway Section also occur on the basis of load? It is useful in terms of load balancing different users to available gateways. There is an indication that Huawei USN can do this ( http://e-learning.huawei.com/zon ... 015TrainingProposal(PS).pdf) but no details are available.