1、 ATIS-0700009 ATIS Standard on - CANADIAN LAES LOCATION REPORTING ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry. More than 200 companie
2、s actively formulate standards in ATIS Committees, covering issues including: IPTV, Cloud Services, Energy Efficiency, IP-Based and Wireless Technologies, Quality of Service, Billing and Operational Support, Emergency Services, Architectural Platforms and Emerging Networks. In addition, numerous Inc
3、ubators, Focus and Exploratory Groups address evolving industry priorities including Smart Grid, Machine-to-Machine, Networked Car, IP Downloadable Security, Policy Management and Network Optimization. ATIS is the North American Organizational Partner for the 3rd Generation Partnership Project (3GPP
4、), a member and major U.S. contributor to the International Telecommunication Union (ITU) Radio and Telecommunications Sectors, and a member of the Inter-American Telecommunication Commission (CITEL). ATIS is accredited by the American National Standards Institute (ANSI). For more information, pleas
5、e visit . Notice of Disclaimer 3G security; Handover interface for Lawful Interception (LI)21This document is available from Alliance for Telecommunications Industry Solutions (ATIS). 2This document is available from the Third Generation Partnership Project (3GPP) at . ATIS-0700009 53 DEFINITION, AC
6、RONYMS AND ABBREVIATIONS 3.1 Definitions Deferred Location Request: location request where one or more LAES Location Reports are required after specific events have occurred. The events may or may not occur immediately. Immediate Location Request: location request where a single LAES Location Report
7、 is required immediately. Location Area (LA): is defined as an area in which a MT may move freely without updating the Visitor Location Register (VLR). A location area includes one or several GSM EDGE Radio Access Network (GERAN) / Universal Terrestrial Radio Access Network (UTRAN) cells. Routing Ar
8、ea (RA): is defined as an area in which a MT, in certain operation modes, may move freely without updating the Serving GPRS Support Node (SGSN). A routing area includes one or several GERAN/UTRAN cells. A RA is always contained within a location area. Service Area (SA): consists of one or more base
9、stations belonging to the same Location Area. Such an area is called a Service Area and can be used for indicating the location of a MT to the core network. 3.2 Acronyms and Abbreviations 3GPP 3rdGeneration Partnership Project ABS Abstract Syntax ASN.1 Abstract Syntax Notation One CDMA* code divisio
10、n multiple access CF Collection Function DF Delivery Function EDGE Enhanced Data rate for Global Evolution GERAN GSM EDGE Radio Access Network GPRS General Packet Radio Service GSM Global System for Mobile Communications IAP Intercept Access Point IAS* internet access and services IMEI International
11、 Mobile Equipment Identity IMS* ip multimedia services IMSI International Mobile Subscriber Identity IP* internet protocol ISO* international organization for standardization ITU* international telecommunication union LA Location Area LAES Lawfully Authorized Electronic Surveillance LEA Law Enforcem
12、ent Agency LI Lawful Interception LR Location Reporting MSISDN Mobile Station International Subscriber Directory Number MT Mobile Terminal NE Network Element POC* push to talk over cellular RA Routing Area RAN Radio Access Network SA Service AreaSGSN Serving GPRS Support Node TIA* telecommunications
13、 industry association TSP Telecommunications Service ProviderATIS-0700009 6UTRAN Universal Terrestrial Radio Access Network VLR Visitor Location Register VoIP* voice over ip WTSC* wireless technologies and system committee WiMAX* worldwide interoperability for microwave access EDITORIAL NOTE: Acrony
14、ms marked with a * appear in the ANS.1 code in Annex A (A.2.1) in lower case. 4 SERVICE DESCRIPTION Intercept Subject location information may be available in a network in a variety of network elements, in a variety of forms, and acquired by a variety of methods. A general LAES location reporting me
15、thod is needed for Canada to provide Intercept Subject location information to law enforcement agencies (LEAs). A LAES Location Report message is defined for this purpose. The location reporting shall be able to provide the longitude/latitude information of the MT when available at an Intercept Acce
16、ss Point (IAP) as a part of the event being intercepted. The location reporting shall be able to provide the location of the serving base station and sector (cell site identification e.g., address, longitude/latitude of the cell site) when available at an IAP to which the Intercept Subjects MT is co
17、nnected. 4.1 Shared Radio Access Figure 1 shows a Radio Access Network (RAN) shared by Operators A and B with an attached MT. The MT is a subscriber of Operator A and is receiving services from Operator As Core Network. The RAN provides MT location information to Operator A. Figure 1: Radio Access N
18、etwork Sharing In the above example, Operator A (who has the lawful authorization) performs the interception and location reporting to the LEAs. The interception is performed in such a way that the interception is transparent to Operator B (i.e., Operator B is not aware of the interception). Provide
19、s MT Location Information Core Network Operator A Core Network Operator B MT being served by Operator A Mobile Terminal (MT) Subscriber of Operator AShared Radio Access Network Operator A and B (owned by Operator B) ATIS-0700009 75 ELECTRONIC SURVEILLANCE ARCHITECTURE FOR CANADIAN LOCATION REPORTING
20、 Lawful Interception (LI) is comprised of five major functions: access, delivery, collection, service provider administration, and law enforcement administration. The relationships between these functions are shown in Figure 2. Figure 2: Electronic Surveillance Model The Access Function, consisting
21、of one or more IAP(s). The Delivery Function, consisting of one or more entities, is responsible for delivering intercepted communications to one or more Collection Function(s). The Service Provider Administration Function controls the TSPs Access Function and Delivery Function. The Collection Funct
22、ion is responsible for collecting and analyzing intercepted communications. The Collection Function is the responsibility of the LEA. The Law Enforcement Administration Function is responsible for controlling and configuring the LEA CF. The Law Enforcement Administration Function is the responsibili
23、ty of the LEA. The Architecture of the Canadian LAES Location Reporting is implementation dependent and examples can be found in Annex B. 6 LAES LOCATION REPORT MESSAGE The LAES Location Report message provides the ability to report Intercept Subject location information to the LEAs. 6.1 Triggering
24、events The LAES Location Report message shall be triggered when the network detects any of the following events: ATIS-0700009 81. Mobility Management the MT connects (e.g. IMSI Attach, GPRS Attach) to the TSPs network the MT disconnects (e.g. IMSI Detach, GPRS Detach) from the TSPs network; the MT i
25、s entering from one location area into another location area in the idle mode (e.g. Location Update, Routing Area Update); the MT periodically provides an update of its location while connected to the TSPs network. 2. MT Positioning Requested by the LEA the network obtains the MT location informatio
26、n (e.g., immediate location request or deferred location request) due to the request of the LEA. Immediate Location Reporting An LAES Location Report message shall be generated and sent to the LEA immediately when a request is received from an LEA for an immediate location report. This event reporti
27、ng is a one-time event and shall be executed immediately after receiving the request from the LEA. Deferred (Periodic) Location Reporting An LAES Location Report message shall be generated and sent to the LEA periodically when required by the lawful authorization. The value of the periodic timer tha
28、t is used for a location report is negotiated between the LEA and the TSP on a per intercept basis. An LAES Location Report message generated due to the trigger “MT positioning by LEA request” shall include the location information as “unavailable” if the network is unable to determine the location
29、of the MT (e.g., an MT which is powered down). An LAES Location Report message generated due to the trigger “MT positioning by LEA request” could result in the network sending one or more messages to the LEA. Also, the location information reported in multiple LAES Location Reports can be different
30、depending on the location information available to the IAPs. Note that IAP placement and where and when events are detected within the network are implementation dependent. 6.2 LAES Location Report message The LAES Location Report message is defined as specified in Table 1. ATIS-0700009 9Table 1 LAE
31、S Location Report Message Information Element MOC Conditions Case Identity M Always Provide IAP System Identity C Provide when known. Intercept Subject Identities M Always provide Time Stamp M Always provide. Location Information M Always Provide Location Report Trigger M Always Provide 6.3 LAES Loc
32、ation Report message information elements 1) Case Identity Identifies the case. 2) IAP System Identity Identifies the network element containing the IAP. 3) Intercept Subject Identities Identities of the Intercept Subject observed at the IAP (i.e., International Mobile Subscriber Identity (IMSI), In
33、ternational Mobile Equipment Identifier (IMEI), Mobile Station International Subscriber Directory Number (MSISDN). 4) Time Stamp Identifies the date and time of the LAES Location Report event. 5) Location Information Location information associated with the Intercept Subject. The Location Informatio
34、n consists of the following information fields: a) Location Type The type of the location reported. b) Location The actual location. c) Time of Location The time the location was recorded. 6) Location Report Trigger - See Clause 6.1 for location trigger types. ATIS-0700009 10 Annex A (normative) A A
35、BSTRACT SYNTAX NOTATION This annex is normative and is considered part of this Standard. This annex describes the Abstract Syntax Notation for reporting location information and the method for delivering the location information to the LEA. The following object tree and ASN.1 definitions apply to Ca
36、nadian Location Reporting. A.1 Object Tree Figure A.1 - Object Tree ATIS-0700009 11 A.2 Location Information Reporting A.2.1 LAES Location Report Message ASN.1 Canadian-Messages-Abstract-Syntax-Module iso(1) member-body(2) us(840) tia(113737) laes(2) t1(1) wtsc(2) canadian(1) location-info(0) versio
37、n-1(0) DEFINITIONS IMPLICIT TAGS := BEGIN IMPORTS CaseIdentity, IAPSystemIdentity, TimeStamp FROM Laesp-j-std-025-b -see J-STD-025-B Ref 1 iso(1) member-body(2) us(840) tia(113737) laes(2) tr45(0) j-std-025(0) j-std-025-b(2) version-1(0) Location FROM UmtsHI2Operations -see 3GPP TS 33.108 Ref 3 itu-
38、t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulintercept(2) threeGPP(4) hi2(1) r10(10) version-2(2); canadian-messages-OID OBJECT IDENTIFIER := iso(1) member-body(2) us(840) tia(113737) laes(2) t1(1) wtsc(2) canadian(1) location-info(0) version-1(0) CanadianProtocol := SEQUENCE prot
39、ocolIdentifier OBJECT IDENTIFIER (canadian-messages-OID), messages CanadianMessages CanadianMessages := CHOICE lAES-Location-report 0 LAES-Location-Report - Message Definitions LAES-Location-Report := SEQUENCE caseId 0 CaseIdentity, iAPSystemId 1 IAPSystemIdentity OPTIONAL, interceptSubjecIdentities
40、 2 InterceptSubjectIdentities, timestamp 3 TimeStamp, location-Information 4 Location-Information locationTrigger 5 UTF8String -See Clause Section 6.1 for location trigger types. - Information Elements Definitions Location-Information := SEQUENCE locationType 0 LocationType, location 1 Location OPTI
41、ONAL , - Will not be reported if Location type value is unavailable. locationTime 2 TimeStamp OPTIONAL - Will not be reported if location type value is unavailable. LocationType := ENUMERATED baseStationLocation (0), - Include only if location of the mobile device is not known but the location and -
42、 location time of the base station is known mobileLocation (1), - Include only if location and location time of the mobile device is known ATIS-0700009 12 unavailable (2), - no location information available. . InterceptSubjectIdentities := SEQUENCE imei 0 OCTET STRING (SIZE (8) OPTIONAL, imsi 1 OCT
43、ET STRING (SIZE (38) OPTIONAL, msisdn 2 OCTET STRING (SIZE (19) OPTIONAL END - Canadian-Messages-Abstract-Syntax-Module A.2.2 Delivery over the communications delivery interface Delivery of location information should be via the same interface being used for other LAES messages. The specifics of the
44、 method for delivery over the communication interface between the Delivery Function (DF) and LEA are determined by TSP and LEA arrangements. ATIS-0700009 13 Annex B (informative) B IMPLEMENTATION EXAMPLES This Annex is informative and is not considered part of this Standard. The following examples d
45、epict how the Canadian LAES Location Reporting Abstract Syntax (ABS) defined in this Standard can be implemented with existing Intercept Access Points (IAPs) and ABSs to provide additional location reporting. B.1 Implementation A Figure B-1 depicts an implementation (Implementation A) with Intercept
46、 Access Points (IAPs) IAP-1 and IAP-2 incorporated in Network Elements (NEs) NE-1 and NE-2. IAP-1 and IAP-2 report event information over a d interface(s) to a LAES Abstract Syntax (ABS) ABS-1 incorporated into a Delivery Function (DF). ABS-1 formats the received event information into LAES messages
47、 that are delivered over an e interface to a peer ABS-1 in a Collection Function (CF). ABS-1 may be a one of a number of ABSs available to implementations such as J-STD-025-B Ref 1 and ATIS-0700005.2007 Ref 2. IAP-2NE-2messageseventsIAP-1NE-1LAESABS-1ddeventsDFLAESABS-1CFeNE Network Element DF Deliv
48、ery FunctionIAP Intercept Access Point CF Collection FunctionABS Abstract Syntax e e interfaceLAES Lawfully Authorized Electronic Surveillance d d interfaceFigure B.1: IAPs and Abstract Syntax B.2 Implementation B Implementation B in Figure B-2 depicts how Implementation A from Figure B-1 can be enh
49、anced with Location Reporting IAPs (LR-IAPs) and the Canadian LAES Location Reporting ABS (LR-LAES-ABS), defined in this Standard, to provide additional location reporting information to the LEAs. Location Reporting IAPs (LR-IAPs) LR-IAP-3 and LR-IAP-4 are added to NE-2 and NE-3. LR-IAP-3 and LR-IAP-4 report location event information (LR-events) over a d interface to the LR-LAES-ABS-2 added to the DF from Im
