ETSI SMG12 	Tdoc SMG12 C-99-458
Sophia Antipolis, France
26 May, 1999

CHANGE REQUEST No :	A 007 r0	Please see embedded help file at the bottom of this
page for instructions on how to fill in this form correctly.	
	
Technical Specification GSM	03.73	Version:	7.0.0		
	
Submitted to SMG	12	for approval	X	without presentation ("non-strategic")			
list SMG plenary meeting no. here 	for information		with presentation ("strategic")	X		

PT SMG CR cover form is available from: http://docbox.etsi.org/tech-org/smg/Document/smg/tools/CR_form/crf28_1.zip	

Proposed change affects:	SIM		ME		Network	X	
(at least one should be marked with an X)

Work item:	SoLSA	

Source:	Ericsson	Date: 	990518	

Subject:	Addition of functionality for support of preferential access.	

Category: 	F	Correction		Release: 	Phase 2		
	A	Corresponds to a correction in an earlier release			Release 96		
(one category 	B	Addition of feature	X		Release 97		
and one release 	C	Functional modification of feature			Release 98		
only shall be 	D	Editorial modification			Release 99	X	
marked with an X)						

Reason for 
change:
	In order to support preferential access an indication has to be stored together with each LSA defined in the HLR. This information also has to be send to the BSS at call set-up.	

Clauses affected:	4.2, 8.1.1, 8.1.2, 8.1.4, 11.2, 11.9, A.3	

Other specs	Other releases of same spec		  List of CRs:		
affected:	Other core specifications		  List of CRs:		
	MS test specifications / TBRs		  List of CRs:		
	BSS test specifications		  List of CRs:		
	O&M specifications		  List of CRs:		

Other 
comments:		

4.2	Subscriber information for Localised Service Area
For a subscriber, the network operator or the service provider can define one or more LSA(s) as allowed LSA(s). It shall be possible to establish an order of priority between the allowed LSAs for a given subscriber and if the subscriber shall have preferential access within these LSAs. It shall also be possible to define whether access outside the allowed LSA(s) is allowed for a subscriber.
Subscriber specific LSA information is stored and managed in the HLR. Application related LSA information is stored in appropriate service platform, e.g. in the CAMEL Service Environment (see annex A).
In addition to subscriber details in the HLR server, it is also necessary for subscriber specific LSA information to be stored and managed in the SIM. 
Subscribers may receive SIM cards with the initial LSA data stored. The management of LSA data on SIM may be performed manually (in which case SIM has to be returned to the network operator or service provider for updating), or over the air interface as described in subclause 11.3.
8.1.1	Stored in the HLR
The following mandatory information shall be stored in the HLR for each service subscriber:
-	a list of all the LSA IDs for the service subscriber; 
-	the priority for each LSA;
-	the preferential access indicator for each LSA;
-	the LSA only access indicator.
The following optional information may be stored in the HLR for each service subscriber:
-	LSA only access indication text (text to be displayed when out of LSA).
The following optional information may also be stored for each subscribed LSA:
-	LSA name (A text string describing area and/or service. For example “ETSI BUILDING”);
-	LSA indication for idle mode (flag to activate/deactivate LSA indication in idle mode);
-	LSA indication for active mode (flag to activate/deactivate LSA indication in active mode);
-	-	idle mode support (flag to activate/deactivate idle mode support in LSA);
-	active mode support (flag to activate/deactivate active mode support in LSA).
The LSA IDs are defined in subclause 9.1.1.
A service subscriber shall not be provided with more than 20 LSAs per PLMN (including Universal LSAs).
8.1.2	Stored in the VLR
The following mandatory information, which is relevant in the VPLMN, shall be stored in the VLR for each service subscriber:
-	a list of all the LSA IDs for the service subscriber;
-	the priority for each LSA;
-	the preferential access indicator for each LSA;
-	the LSA only access indicator.
The following optional information may also be stored for each subscribed LSA:
-	LSA indication for active mode (flag to activate/deactivate LSA indication in active mode);
--	active mode support (flag to activate/deactivate active mode support in LSA).
This information shall be brought forward to the VLR at the same time as other subscriber information is copied form HLR. VLR entries shall be modified when corresponding HLR records are changed.
8.1.4	Stored in the SGSN
The following mandatory information, which is relevant in the VPLMN, shall be stored in the SGSN for each service subscriber:
-	a list of all the LSA IDs for the service subscriber;
-	the priority for each LSA;
-	the preferential access indicator for each LSA;
-	the LSA only access indicator.
The following optional information may also be stored for each subscribed LSA:
-	LSA indication for active mode (flag to activate/deactivate LSA indication in active mode);
-	active mode support (flag to activate/deactivate active mode support in LSA).
This information shall be brought forward to the SGSN at the same time as other subscriber information is copied form HLR. SGSN entries shall be modified when corresponding HLR records are changed.
11.2	Subscription management
When the subscriber record is created in the HLR, the list of allowed LSAs, priority of each LSA, the preferential access indicator of each LSA and information about access rights outside these LSAs shall be included.
The network operator can change the LSA information for a subscription at any time. A change of subscription shall not affect any on-going calls at the moment of change.
The update of SIM with user LSA information is done as depicted in subclause 11.3.
11.9	Overview of signalling
In this overview, the messages required to implement the specified concept are identified and brief details are given of each message. These signalling flows are not normative, but provided as an illustration on possible signalling interworking (note that only those parts of the procedures that are relevant for the LSA service are included). 

Figure 2: Signalling information required at location registration
A_LOCATION_UPDATING_REQUEST: Standard message.
MAP_UPDATE_LOCATION_AREA: Standard message.
MAP_INSERT_SUBSCRIBER_DATA: The VLR is provided with the subscriber information including the allowed LSA ID(s), priority of each LSA, the preferential access indicator for each LSA and the LSA only access indicator of current PLMN.

Figure 3: Signalling information required at updating of the subscriber’s LSA information by using SMS
MT-SHORT-MESSAGE, MAP-MT-FORWARD-SHORT-MESSAGE request, SM TP SMS-DELIVER: Standard messages containing subscriber's LSA information and are parts of SIM data download.
SM TP SMS-DELIVER acknowledgement, MAP-MT-FORWARD-SHORT-MESSAGE response: Standard messages containing result of the operation.

Figure 4: Signalling information required for mobile originating call establishment
SYSTEM_INFO: The network provides the cell identity and/or LSA ID(s) of the cell, LSA cell reselection parameters and the exclusive access indication.
Initial RACH CHANNEL_REQUEST: Standard message.
IMMEDIATE_ASSIGNMENT: Standard message.
SABM (SERV_REQ): Standard message.
UA (SERV_REQ): Standard message.
COMPLETE_LAYER3_INFORMATION: The MSC is provided with initial information about the requested service together with the LSA ID(s) of current cell.
CM_SERVICE_ACCEPT: Standard message. The service request is acknowledged. Acknowledgement of the service can also be performed by invocation of ciphering mode setting.
SETUP: Standard message.
CALL_PROCEEDING: Standard message.
LSA INFO: New message including the allowed LSA ID(s), priority of each LSA, the preferential access indicator for each LSA and an indication about the access rights outside these LSA(s) for the service subscriber. This message needs to be sent before Assignment request. Additional  messages may be sent anytime during the lifetime of a call.
ASSIGNMENT_REQUEST: Standard message.
ASSIGNMENT_COMMAND: Standard message.
SABM: Standard message.
UA: Standard message.
Air_ASSIGNMENT_COMPLETE: Standard message.
A_ASSIGNMENT_COMPLETE: Modified assignment complete including the LSA ID of current cell.

Figure 5: Signalling information required at BSS external handover initiation
HANDOVER REQUIRED: Standard message.
MAP_PREPARE_HANDOVER: Standard message. Including the modified handover request.
HANDOVER_REQUEST: Modified handover request including the allowed LSA ID(s), priority of each LSA, the preferential access indicator of each LSA and an indication about the access rights outside these LSA(s).
A.3	Signalling Interworking

Figure A2: Signalling interworking at Mobile Originating Call Establishment with applications on CAMEL Service Environment
SYSTEM_INFO: The network provides the cell identity and/or LSA ID(s) of the cell, LSA cell reselection parameters and the exclusive access indication.
Initial RACH CHAN_REQ: Standard message.
IMM_ASS: Standard message.
SABM (SERV_REQ): Standard message.
UA (SERV_REQ): Standard message.
COM_L3_INFO: The MSC is provided with initial information about the requested service together with the LSA ID(s) of current cell.
CM_SERV_ACC: Standard message. The service request is acknowledged. Acknowledgement of the service can also be performed by invocation of ciphering mode setting.
SETUP: Standard message.
INITIALDP: Modified CAP message indicating that the CAMEL TDP has been met. Additionally the LSA ID(s) of the current cell are sent to the gsmSCF.
CONTINUE: Modified CAP message indicating that the call continues without modifications. 
CONNECT: Modified CAP message indicating that the gsmSCF has modified e.g. the destination number. 
CALL_PROCEEDING: Standard message.
LSA INFO: New message including the LSA ID(s), priority of each LSA, the preferential access indicator of each LSA and an indication about the access rights outside these LSA(s) for the service subscriber. This message need to be sent  before Assignment Request message. Additional messages may be sent at anytime during the lifetime of a call.
ASS_REQ: Standard message.
ASS_CMD: Standard message.
SABM: Standard message.
UA: Standard message.
Air_ASS_COM: Standard message.
A_ASS_COM: Modified assignment complete including the LSA ID of current cell.