10.12 Paging Permission with Access Control (ppacr) uid_360032

Resources: S1,C1,R2

References

Document	Title/Contents
WID(s)
SP-070501	WID on Paging Permission with Access Control Requirements (PPACR)
CP-070783	WID on Paging Permission with Access Control Requirements for CT1 (PPACR-CT1)
Impacted Specifications
TS 22.011	Service accessibility - S1 CR#0094 PPAC requirement, CR#0119 PPAC restriction to UTRAN
TS 24.008	Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 - C1
TS 23.122	Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode - C1
TS 25.331	Radio Resource Control (RRC); Protocol specification - R4 CR#3276 Introduction of PPAC, CR#3313 Early Implementation of PPAC
New Dedicated Specifications/Reports
TS 24.301	Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 - C1

Supporting Individual Members: NEC, NTT DoCoMo, Samsung, Sharp, Softbank Mobile, Telecom Italia, Toshiba.

UID	Name	Resource	Hyperlink	TS_TR
360032	Paging Permission with Access Control (PPACR)	S1,C1	SP-070501	-
370084	Stage 1 for PPACR	S1	SP-070501	22.011
380017	Stage 3 for PPACR (CT1)	C1	CP-070783	24.008, 23.122, 24.301

This work is based on TR 22.908 Study on Paging Permission with Access Control (FS_PPAC) UID_330016.

Paging Permission with Access Control Requirements (PPACR) work solves three issues caused by the current access control mechanism not allowing reaching UEs for which access class restriction was applied:

• Priority Service There is a priority communication service which is produced to an authorized user (e.g. government) by using priority mechanisms such as special access class (i.e. access classes 11 to 15) allocation and high priority level allocation of eMLPP. However there is an issue in the congestion situation (e.g. caused by earthquake) that the authorized user cannot access to the corresponded user when access class barring is applied to the corresponded user.

• Emergency service User sets up an emergency call and it is unfortunately released. At the condition, emergency agencies (e.g. police) would like to call back the user. However in the current specification, it is impossible to call back if access control restriction has been applied to the user.

• Communication between UEs in the same area where access control is performed There is an area where access control is performed. In order to allow all the users in the area to setup calls, broadcasting access class numbers are changed at an interval of some seconds. For example, in an interval UEs with access class 0 can perform setup and UEs with access classes 1-9 cannot do setup, in another interval UEs with access class 1 can do setup and UEs with access classes 0, 2-9 cannot do setup. However there is an issue that communication between UE with an access class number and UE with another access class number cannot be established in the area. The communication helps users in the emergency situation, e.g. a mother call to her child to know where he/she is.

This work adds to TS 22.011 functional requirements and information flow for Paging Permission with access control.

CT1 work on PPACR

As it is identified by SA1, there are cases even during access control, the successful terminated call establishment is expected such as priority communication service originated from the authorized user to the user who camps in congested area, emergency service call back, and communication between user UEs in the same area where access control is performed. In this case, a network operator performs an access class control, and the access class of originating UE is unbarred and terminating UE is barred.

The current access control mechanism does not allow UEs to respond and establish terminating calls; therefore, it is required to provide the enhanced mechanism to solve this issue.

CT1 specified the Stage3 capabilities and functionalities to meet the requirement defined in SA1 TS 22.011.

The PPAC related capabilities are the permission for UE to respond the paging request while access control operation. UE may make access attempts for mobile terminated call control and terminated message control (e.g., SMS) as an optional procedure of access control.

PPAC is intended to be utilized for the CS/PS domain.