Cisco Cisco Packet Data Gateway (PDG)
HNB Gateway in Wireless Network
▀ Features and Functionality - Base Software
▄ HNB-GW Administration Guide, StarOS Release 17
34
Important:
For more information on Open Access Mode support configuration, refer Open Access Mode
Configuration section of HNB-GW Administration Guide.
Paging Optimization Support
In 16.0 Paging is further optimized, now there are three phases for paging-Phase1 Paging --Page last known
HNBPhase2 Paging---Page last known GridPhase3 Paging---Page last known LAI/RAI.
HNBPhase2 Paging---Page last known GridPhase3 Paging---Page last known LAI/RAI.
HNB-GW remembers the HNB Identity and LAI/RAI of the last known HNB from where a UE is/was registered even
after the UE de-registers. The amount of time for which the HNB-GW stores this UE information after UE De-
registration is configurable. Typically operator should set this value to the value of periodic LU/RAU timer value or
more.
after the UE de-registers. The amount of time for which the HNB-GW stores this UE information after UE De-
registration is configurable. Typically operator should set this value to the value of periodic LU/RAU timer value or
more.
HNB-GW performs a two phase paging procedure:
On receiving a Paging request from MSC, HNB-GW forwards the Paging request to the HNB where the UE had
last registered from and starts a timer called Phase 1 timer.
If no response is received from the UE before the Phase 1 timer expires, HNB-GW forwards the paging request
to all the HNBs belonging to the LAI/RAI of the last known HNB of the UE and starts a timer called Phase 2
timer.
timer.
If no response is received from the UE before the Phase 2 timer expires, HNB-GW declares the paging procedure as
failed. If a response is received from the UE anytime during the procedure, the paging procedure is declared successful
and the currently running timer is stopped.
failed. If a response is received from the UE anytime during the procedure, the paging procedure is declared successful
and the currently running timer is stopped.
Each of the 2 phases of paging procedure can be enabled and disabled via configuration. The values of the Phase 1 and
Phase 2 timers are also configurable. Separate configurations are provided for CS and PS domains.
Phase 2 timers are also configurable. Separate configurations are provided for CS and PS domains.
The operator should set the values of these timers based on the Paging retry timer on MSC and SGSN. Typically,
Phase1 timer value+Phase2+Phase3 timer value should be less than or equal to Paging retry timer on MSC/SGSN. Any
paging request coming for an IMSI for a particular domain while paging procedure is ongoing in HNBGW for same
domain, Paging will be dropped. If any paging request coming for an IMSI for a particular domain while paging
procedure is ongoing in HNBGW for different domain, Paging will be served according to paging algorithm of that
domain..
Phase1 timer value+Phase2+Phase3 timer value should be less than or equal to Paging retry timer on MSC/SGSN. Any
paging request coming for an IMSI for a particular domain while paging procedure is ongoing in HNBGW for same
domain, Paging will be dropped. If any paging request coming for an IMSI for a particular domain while paging
procedure is ongoing in HNBGW for different domain, Paging will be served according to paging algorithm of that
domain..
QoS Management with DSCP Marking
Differentiated Services Code Point (DSCP) marking over IuH interface support in 3G UMTS HNB Access Network is
provided on HNB-GW for traffic quality management in accordance with following standards:
provided on HNB-GW for traffic quality management in accordance with following standards:
3GPP TS 25.414 V9.0.0 (2009-12): 3rd Generation Partnership Project; Technical Specification Group Radio
Access Network; UTRAN Iu interface data transport and transport signalling (Release 9)
3GPP TS 25.468 V9.2.0 (2010-06): 3rd Generation Partnership Project; Technical Specification Group Radio
Access Network; UTRAN Iuh Interface RANAP User Adaptation (RUA) signalling (Release 9)
3GPP TS 25.469 V9.2.0 (2010-06): 3rd Generation Partnership Project; Technical Specification Group Radio
Access Network; UTRAN Iuh interface Home Node B (HNB) Application Part (HNBAP) signalling (Release
9)
9)
IETF RFC 2474, Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers
IETF RFC 4594, Configuration Guidelines for DiffServ Service Classes