{"id":978,"date":"2026-01-23T09:42:25","date_gmt":"2026-01-23T09:42:25","guid":{"rendered":"https:\/\/dev.ic-services.io\/?p=978"},"modified":"2026-10-21T14:12:32","modified_gmt":"2026-10-21T13:12:32","slug":"mvno-3g-shutdown-interception-legale","status":"publish","type":"post","link":"https:\/\/ic-services.io\/fr\/resources\/blog\/mvno-3g-shutdown-lawful-interception\/","title":{"rendered":"3G Shutdown and IMS Voice: When MVNOs Need Their Own Lawful Interception"},"content":{"rendered":"

Why the 3G Shutdown Matters For MVNO Lawful Interception<\/h4>\n\n\n\n

Most European operators have already switched off 3G (in Germany, for example, during 2021), and 2G networks are next: Telekom Deutschland plans to switch off 2G by 30 June 2028. For most subscribers, this means faster data and better coverage on 4G and 5G. For Mobile Virtual Network Operators (MVNOs) that run their own voice core, or that move to their own IMS as 3G (and later 2G) networks close, lawful interception has to move to the IMS as well. Light MVNOs that use their host’s VoLTE service usually remain covered by the host’s LI.<\/p>\n\n\n\n

Under 3G, most light MVNOs relied on their host MNO’s circuit-switched core, so the host carried out the interception; depending on national law, the MVNO still had its own duties, such as making sure the host could implement orders. Full MVNOs that ran their own switching already operated their own LI.<\/p>\n\n\n\n

For MVNOs that take voice into their own hands, that model changes when circuit-switched voice disappears.<\/p>\n\n\n\n

De la commutation de circuits \u00e0 l'IMS : le changement technique<\/h4>\n\n\n\n

Avec le d\u00e9classement de la 3G, les services vocaux migrent vers VoLTE (Voice over LTE) et VoNR (Voice over New Radio for 5G). Ces deux technologies transmettent la voix sous forme de paquets IP sur le r\u00e9seau de donn\u00e9es, \u00e0 l'aide de l'architecture IMS (IP Multimedia Subsystem).<\/p>\n\n\n\n

Some host MNOs do not offer VoLTE to their MVNOs, and many full MVNOs choose to run their own IMS for control over features and billing. Running its own IMS gives an MVNO more control over service features, billing and customer experience. But it also means the MVNO now controls voice call signalling and, through its IMS media functions, the voice media, and with that it takes on lawful interception duties of its own.<\/p>\n\n\n\n

When the MVNO operates the IMS core that processes voice calls, it becomes an obliged operator for that voice service. The host MNO usually keeps obligations for the radio and packet core it operates, so the two parties must agree who delivers what to avoid gaps and duplicate content.<\/p>\n\n\n\n

Ce que les MVNO doivent mettre en \u0153uvre<\/h4>\n\n\n\n

Les op\u00e9rateurs mobiles virtuels (MVNO) qui passent \u00e0 leur propre infrastructure IMS ont besoin d'une solution MVNO compl\u00e8te solution d'interception l\u00e9gale<\/a> qui couvre :<\/p>\n\n\n\n

Gestion des bons de souscription<\/a><\/strong>
A system to receive, validate and track lawful interception requests from law enforcement agencies. This includes managing target identities (for IMS voice, for example the IMPU\/TEL URI, IMPI, MSISDN or IMEI), warrant timelines and authorized agency access.<\/p>\n\n\n\n

Points d'interception IMS<\/strong>
Integration with the IMS core to collect Intercept Related Information (IRI) and Content of Communication (CC) for VoLTE and VoNR calls. This requires interception of signalling (IRI) at the P-CSCF\/S-CSCF and of media (CC) at the media-plane functions such as the IMS-AGW, TrGW or MRF (3GPP TS 33.127).<\/p>\n\n\n\n

M\u00e9diation et formatage<\/strong>
A plateforme de m\u00e9diation<\/a> that receives the X2\/X3 output of the IMS points of interception and delivers it in the handover format required nationally, for example ETSI TS 102 232-5<\/a> for IP multimedia, used with the TS 102 232-1<\/a> PS-PDU (as in Germany), or 3GPP TS 33.108\/33.128.<\/p>\n\n\n\n

Transfert s\u00e9curis\u00e9<\/strong>
Canaux de transmission crypt\u00e9s (HI2 pour IRI, HI3 pour CC) vers installations de surveillance des forces de l'ordre<\/a>, avec authentification mutuelle, confirmation de r\u00e9ception et journalisation \u00e0 des fins d'audit.<\/p>\n\n\n\n

Rapport de conformit\u00e9<\/strong>
Des capacit\u00e9s de documentation et de reporting pour d\u00e9montrer la conformit\u00e9 lors des audits r\u00e9glementaires et r\u00e9pondre aux demandes de renseignements des agences sur le statut de l'interception.<\/p>\n\n\n\n

La mise en place de cette infrastructure en interne n\u00e9cessite des comp\u00e9tences sp\u00e9cialis\u00e9es dans les normes 3GPP, les sp\u00e9cifications ETSI LI, l'architecture IMS et les exigences en mati\u00e8re d'interface avec les forces de l'ordre - des comp\u00e9tences que la plupart des MVNO n'ont pas au sein de leur personnel.<\/p>\n\n\n\n

Trois voies d'avenir pour les MVNO<\/h4>\n\n\n\n

Les MVNO confront\u00e9s \u00e0 ce d\u00e9fi ont trois options principales :<\/p>\n\n\n\n

Option 1 : Construction en interne<\/strong>
Embaucher des sp\u00e9cialistes en LI, acheter des logiciels de m\u00e9diation, int\u00e9grer des \u00e9l\u00e9ments IMS et \u00e9tablir des connexions LEA. Cela permet un contr\u00f4le maximal, mais n\u00e9cessite des investissements importants, des co\u00fbts op\u00e9rationnels permanents et la capacit\u00e9 de suivre l'\u00e9volution des normes.<\/p>\n\n\n\n

Option 2 : LI g\u00e9r\u00e9<\/a> Service<\/strong>
Outsource the entire LI operation to a specialist provider like ICS. The provider operates the mediation platform, manages warrant lifecycles, handles LEA handover and runs day-to-day compliance on your behalf. The legal obligation stays with you. The MVNO maintains oversight but avoids building specialized infrastructure and hiring dedicated staff.<\/p>\n\n\n\n

Option 3 : Plate-forme logicielle avec assistance<\/strong>
Vous pouvez acqu\u00e9rir une licence pour le logiciel de gestion et de m\u00e9diation LI et l'utiliser sur votre propre infrastructure, avec l'aide \u00e0 la mise en \u0153uvre, la formation et les conseils permanents d'un sp\u00e9cialiste LI. Cette solution interm\u00e9diaire vous permet de garder le contr\u00f4le tout en b\u00e9n\u00e9ficiant d'une expertise externe pour la mise en place et la maintenance.<\/p>\n\n\n\n

Most MVNOs find that managed services or supported software platforms offer the best balance of compliance assurance, cost control and operational simplicity. The business case for building in-house only makes sense at significant scale \u2013 typically two to three million subscribers or more in one market.<\/p>\n\n\n\n

N'attendez pas la derni\u00e8re minute<\/h4>\n\n\n\n

Shutdown timelines vary by country, but the trend is clear: circuit-switched voice is ending, IMS is the future, and MVNOs that operate their own IMS need their own lawful interception solutions. Regulators expect compliance from day one of IMS operation \u2013 there’s no grace period for MVNOs to “figure it out later.”<\/p>\n\n\n\n

ICS aide les MVNO \u00e0 passer le cap de la transition avec des solutions flexibles<\/a> qui correspondent \u00e0 votre calendrier, \u00e0 votre budget et \u00e0 votre environnement technique. Que vous ayez besoin d'un service g\u00e9r\u00e9 complet, d'une assistance \u00e0 l'int\u00e9gration pour l'interception IMS ou de conseils pour comprendre vos obligations, nous vous apportons l'expertise n\u00e9cessaire pour que vous restiez en conformit\u00e9 au fur et \u00e0 mesure que votre infrastructure vocale \u00e9volue.<\/p>\n\n\n\n

L'arr\u00eat de la 3G impose un changement. Veillez \u00e0 ce que l'interception l\u00e9gale des MVNO ne devienne pas l'obstacle surprise de votre plan de migration vers l'IMS.<\/p>\n\n\n\n

Contactez ICS pour discuter de vos exigences en mati\u00e8re d'interception l\u00e9gale pour les MVNO et explorer la bonne solution pour votre d\u00e9ploiement IMS.<\/strong><\/p>\n\n\n\n

<\/p>\n\n\n\n

<\/p>\n\n\n\n

Further Reading on IMS Lawful Interception for MVNOs<\/h2>\n\n\n\n

Pour en savoir plus sur des sujets connexes, consultez les articles suivants :<\/p>\n\n\n\n