B.12 Contents of Communication (HI3 IMS-based VoIP)

33.1083G Security3GPPHandover interface for Lawful Interception (LI)Release 17TS

VoIP-HI3-IMS {itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) threeGPP(4) hi3voip(12) r15 (15) version-1 (1)}

DEFINITIONS IMPLICIT TAGS ::=

BEGIN

IMPORTS

LawfulInterceptionIdentifier,

TimeStamp,

Network-Identifier

FROM HI2Operations

{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) hi2(1) version18(18)}– from ETSI HI2Operations TS 101 671, version 3.12.1

National-HI3-ASN1parameters

FROM Eps-HI3-PS {itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulintercept(2) threeGPP(4) hi3eps(9) r14 (14) version-0 (0)};

— Object Identifier Definitions

— Security DomainId

lawfulInterceptDomainId OBJECT IDENTIFIER ::= {itu-t(0) identified-organization(4) etsi(0)

securityDomain(2) lawfulIntercept(2)}

— Security Subdomains

threeGPPSUBDomainId OBJECT IDENTIFIER ::= {lawfulInterceptDomainId threeGPP(4)}

hi3voipDomainId OBJECT IDENTIFIER ::= {threeGPPSUBDomainId hi3voip(12) r15 (15) version-1 (1)}

Voip-CC-PDU ::= SEQUENCE

{

voipLIC-header [1] VoipLIC-header,

payload [2] OCTET STRING

}

VoipLIC-header ::= SEQUENCE

{

hi3voipDomainId [0] OBJECT IDENTIFIER, — 3GPP VoIP HI3 Domain

lIID [2] LawfulInterceptionIdentifier OPTIONAL,

voipCorrelationNumber [3] VoipCorrelationNumber,

— For VoIP, contains the same contents as the

— cc parameter contained within an IRI-to-CC-Correlation parameter

— which is contained in the IMS-VoIP-Correlation parameter in the

— IRI [HI2]; For PTC, contains the same contents as the cc parameter

— contained within an IRI-to-CC-Correlation parameter which is

— contained in the CorrelationValues parameter in the IRI [HI2]

timeStamp [4] TimeStamp OPTIONAL,

sequence-number [5] INTEGER (0..65535),

t-PDU-direction [6] TPDU-direction,

national-HI3-ASN1parameters [7] National-HI3-ASN1parameters OPTIONAL,

— encoded per national requirements

ice-type [8] ICE-type OPTIONAL,

— The ICE-type indicates the applicable Intercepting Control Element in which

— the VoIP CC is intercepted.

…,

payload-description [9] Payload-description OPTIONAL,

— When this option is implemented, shall be used to provide the RTP payload description

— as soon as it is available at DF3 (initial one or each time the DF3 is notified of a

— change)

networkIdentifier [10] Network-Identifier OPTIONAL,

— Mandatory when used for PTC

— Identifies the network element that is reporting the CC

pTCSessionInfo [11] UTF8String OPTIONAL

— Mandatory when used for PTC

— Identifies the PTC Session. Together with the ‘voipCorrelationNumber’, uniquely

— identifies a specific PTC talk burst.

}

VoipCorrelationNumber ::= OCTET STRING

TPDU-direction ::= ENUMERATED

{

from-target (1),

to-target (2),

combined (3), — Indicates that combined CC (i.e., from/to-target)delivery is used.

unknown (4)

}

ICE-type ::= ENUMERATED {

ggsn (1),

pDN-GW (2),

aGW (3),

trGW (4),

mGW (5),

other (6),

unknown (7),

… ,

mRF (8),

lmISF (9),

sGW (10)

}

Payload-description ::= SEQUENCE

{

copyOfSDPdescription [1] OCTET STRING OPTIONAL,

— Copy of the SDP. Format as per RFC 4566 [94].

— used for VoIP

…,

mediaFormat [2] INTEGER (0..127) OPTIONAL,

— as defined in RFC 3551 [93]

— used with IP-based delivery for CS

mediaAttributes [3] OCTET STRING OPTIONAL

— as defined in RFC 4566 [94]

— used with IP-based delivery for CS

}

END — OF VoIP-HI3-IMS