【正文】 c e c a p a b ili t y s e r v e r ( s )I n t e r f a c ec l a s sOS A A P IOp enS er v iceA ccessd i s c o v e r yA p p li c a t i o nA p p li c a t i o ns e r v e rOS A i n t er n al A P I? Part of the “Virtual Home Environment” ? Open, standardized API for 3rd party application developers – Developed in the Parlay group ? “Exports” typical Mobile Network Functionality – Call control, UMTS QoS – User location, Terminal capabilities – Content based charging Rev PA1 2/25/02 26 OSA Open Service Access f r a m e wo r k U s e r L o c a t i o n C a l l c o n t r o lHL R CS EW G WW P PS e r v e r sE . g . L o c a t i o n s e r v e r M E x E s e r v e r S A T s e r v e rS e r v i c e c a p a b ili t y s e r v e r ( s )I n t e r f a c ec l a s sOS A A P IOp enS er v iceA ccessd i s c o v e r yA p p li c a t i o nA p p li c a t i o ns e r v e rOS A i n t er n al A P IFramework mechanisms: ?Authentication ?Discovery of service capabily features Network Service Capability Features: (Abstractions of work functionality) ?Call control ?User location ?Terminal capabilities ?Charging Applications: ?VPN ?Conferencing ?Location based applications ?…. Rev PA1 2/25/02 27 OSA and Server distribution ? Actual servers and the SCS may be distributed ? Optional to run on the same physical server or in one or more separate ? Implications for application server placement in the work? S C S?Gatew ay?OS A A P IN on standard i s edInter facesC S E ….H LRP hys i ca l ent i ty F unct i ona l ent i tySCS?Ga te w a y ?OS A A P IN o n s t a n d a r d i s e dI n t e r f a c e sCSE ….H L RSCS SCSSCSOS A A P ICSE ….H L RSCS SCSRev PA1 2/25/02 28 Access Networks Core Networks Transit Net Transit Net Transit Net Private Peering NAP Public Peering Inter Datacenter PSTN Regional Wireline Regional Voice Voice Cell Cell Cell Cable Modem LAN LAN LAN Premises based WLAN WLAN WLAN Premises based Operator based Data Data RAS Analog DSLAM So does all this fit into an Inter Service Architecture? Rev PA1 2/25/02 31 IX GPRS operators MO needs to adapt to this IX backbone provider backbone provider backbone provider data center hosting cacheing service/content ., modem pool or CATV access operator GPRS operator link BGPrelation FW FW FW PS CN G S service work service/ content FW service work data center hosting cacheing service/content GPRS operator FW PS CN G S FW GPRS operator FW PS CN G S FW The NO OSA “Exported”? Rev PA1 2/25/02 34 Issues ? Performance implications on GTP tunneling and IMS backbone VPNs? ? Will application developers buy into the OSA idea? ? How easy will it be for current SPs to offer applications to mobile customers? – Can OSA be easily distributed? ? Alternatives? – Direct Inter access from mobiles… – Service adaptation in overlay works ? Mobile IP? ? Specialized Radio QoS overlay support work?