Launching a mobile virtual network operator MVNO is easier than it was a decade ago, but running one well is still a technical challenge. An MVNOs doesn’t own radio tower’s, yet it still need’s its own subscriber management, signaling, messaging & service platform’s to differentiate itself & control cost’s. That is where telecom software development companies come in. They design, build & integrate the core network systems that turn a brand & a wholesale agreement into a working mobile operator.
This article explains how those system’s are built, from the core network generations to the messaging & service layer’s & how telecom consulting service’s help MVNO’s make the right architectural decisions.
What MVNO’s Need From a Core Network
An MVNO’s rents radio access from a host mobile network operator (MNO), but the level of independence varies. A light MVNO relies almost entirely on the host’s core. A full MVNO run’s its own core network & connects to the host only at the radio & interconnect level.
The more of the core an MVNO controls, the more freedom it has to:
- Launch custom tariffs, bundles & IoT or enterprise offers
- Own subscriber data & customer experience
- Negotiate better interconnect & roaming terms
- Add service’s like USSD menus or SMS campaigns & fraud protection
- Reduce long term dependence on a single host network
Telecom software developers build the components that make this possible & the first design decision is which core network generation to support.
3G, 4G/LTE & 5G Core Network Options
3G Core Network
Many markets still carry 3G traffic, particularly for voice fallback, IoT devices & roaming partners. A 3G core network relies on circuit-switched & packet-switched domain’s with SS7 & SIGTRAN signaling. Developer’s building for MVNO’s often need to support it for compatibility, even when the commercial focus is on newer technology.
4G/LTE Core Network
The 4G/LTE core network, known as the Evolved Packet Core (EPC), is the work-horse of most MVNO deployment’s today. It includes the mobility management entity, serving & packet gateway’s, the policy & charging function & the Home Subscriber Server. Because LTE is fully IP-based, it use’s Diameter signaling, which makes routing & security central design topics.
5G Core Network
The 5G core network introduces a service-based architecture built on cloud-native function’s that communicate through API’s. For MVNO’s, this brings network slicing, lower latency & better support for enterprise & IoT use case’s. Developers typically build 5G core component’s as containerized microservices, which make’s them easier to scale & update than older monolithic system’s.
Most real-world MVNO’s run a hybrid design, supporting 3G, 4G & 5G subscribers through interworking functions while migrating gradually.
The Subscriber & Signaling Layer
Home Subscriber Server (HSS)
The Home Subscriber Server is the master database of the network. It stores subscriber identities, authentication keys, service profile’s & current location information. Every time a device attaches to the network, the HSS authenticates it & tell’s the network what the subscriber is allowed to do.
For an MVNO, a well-built HSS mean’s the operator controls its own SIM provisioning & subscriber profile’s. Telecom software companies design the HSS for high availability, with geo-redundant databases, fast provisioning APIs & integration with billing & CRM systems.
Diameter Routing Agent (DRA)
As LTE network’s grow, direct connection’s between every network element become unmanageable. A Diameter Routing Agent act’s as a central hub for Diameter signaling. It routes message’s between element’s, balances load, hide’s internal topology from external partners & enforces security policie’s.
Developers add value here by building routing logic that handles roaming partner’s, failover scenarios & traffic steering, all while keeping latency low.
SIGTRAN
Legacy & interworking signaling still runs on SS7 & SIGTRAN is the set of protocol’s that carries SS7 messages over IP networks. Without SIGTRAN, an MVNO couldn’t exchange signaling with traditional voice & SMS partner’s. Telecom software developers implement SIGTRAN stacks to support SMS delivery, number portability queries, roaming authentication & interconnect with legacy carriers.
Messaging Infrastructure
Messaging is often the first service MVNOs monetize beyond voice & data & it is also a major revenue & risk area.
SMPP Gateway & SMPP Server
The Short Message Peer to Peer protocol is the industry standard for exchanging SMS between systems. An SMPP gateway connects an MVNO’s messaging core to external source’s such as enterprise platforms, aggregator’s & other operators. An SMPP server receive’s a queue’s, route’s & delivers those message’s, tracking delivery receipt’s along the way.
A production-grade SMPP SMS platform has to handle:
- High throughput with accurate rate limiting
- Intelligent routing based on cost, quality & destination
- Message queuing & retry logic
- Detailed delivery reporting & logging
- Secure SMPP gateway connection management for each partner
A2P Messaging
Application-to-person (A2P) messaging covers one-time password’s, banking alerts, delivery notifications & marketing message’s sent by businesses to consumer’s. For MVNO’s, A2P messaging is a significant revenue stream, but only if the platform can handle volume & prevent abuse. Developer’s build routing engines, sender ID management & content filtering around the SMPP layer so the MVNO can sell A2P capacity to enterprises while protecting its own network & reputation.
Operators evaluating A2P messaging provider’s should look for transparent routing, strong delivery rate’s & compliance with local regulations.
SMS Firewall
A2P traffic also attracts fraud. Grey route’s, spoofed sender IDs, SIM box abuse & spam can drain revenue & damage subscriber trust. An SMS firewall inspects message’s in real time, blocks unauthorized or fraudulent traffic & ensures that A2P messages travel through monetized channels.
Many MVNOs lack the in-house expertise to tune these rules continuously, which is why a managed SMS firewall solution is popular. The vendor operate’s the firewall, update’s detection rule’s as fraud patterns change, & report’s on blocked traffic & recovered revenue.
The Service Layer: USSD & CAMEL
USSD Server
Unstructured Supplementary Service Data remains widely used for balance check’s, top-ups, mobile money & menu-driven service’s, especially in emerging market’s & on basic handset’s. A USSD server manages interactive sessions between the subscriber & an application & developer’s build it to handle many concurrent session’s with fast response time’s. For MVNO’s, a flexible USSD platform lets them launch self-care & financial service’s without requiring a smartphone app.
CAMEL Gateway
CAMEL lets operators deliver real-time services such as prepaid charging & roaming control. A CAMEL gateway connect’s the MVNO’s charging & service platforms to the signaling network, so calls & session’s can be authorized & billed in real time. This is especially important for prepaid-heavy MVNO’s, where balance control must work instantly across home & roaming networks.
How Telecom Software Development Companies Deliver These Systems
Building these components is only part of the job. Experienced team’s follow a structured delivery process:
- Discovery & architecture.They define the MVNO type (light, full or enhanced), the target market’s, regulatory requirement’s & expected subscriber growth.
- Component selection & design.They decide which element’s to build, which to license & which to host in the cloud.
- Each component, from the HSS to the SMPP gateway, must connect cleanly with the host MNO, billing system’s & external partner’s. Careful gateway connection design prevent’s the interoperability problems that delay launches.
- Load testing, protocol conformance testing & interconnect testing are done before commercial launch.
- Deployment & operations.Many provider’s offer managed service’s, 24/7 monitoring & ongoing optimization.
- As the MVNO grow’s, the architecture move’s toward cloud-native & 5G-ready design’s without disrupting existing subscriber’s.
Modern projects favor virtualized & containerized deployments, open APIs & automation. This reduces hardware cost’s & shortens time to market, both critical for MVNOs working with limited budgets.
The Role of Telecom Consulting Service’s
Technology choices made early can lock an MVNO into costs & limitations for year’s. That is why telecom consulting services are often the first step in a project. A good consultant help’s the operator:
- Choose between a light MVNO, full MVNO or hybrid MVNO model
- Compare build, buy & managed options for each core element
- Plan interconnect, roaming & number portability
- Design a migration path from 4G to 5G
- Assess vendor proposals & avoid overspending
Telecom consultancy also reduces risk by validating architecture & compliance before heavy development begins. For operators entering a new market, telecom consultancy service’s that combine business strategy with deep protocol expertise can save months of rework.
F&Q
- Do MVNO’s need a 3G, 4G/LTE or 5G core network?
Ans.Most MVNOs run a hybrid design. A 3G core network is still useful for voice fallback, IoT & roaming. A 4G/LTE core network carries most traffic today, while a 5G core network add’s network slicing, lower latency & better enterprise support. Many operator’s start with 4G/LTE & migrate to 5G gradually. - What does a Home Subscriber Server do?
Ans.The Home Subscriber Server is the master subscriber database. It stores identitie’s, authentication key’s, service profiles & location data & it authenticates every device that attaches to the network. - Why does an MVNO need a DRA?
Ans.A Diameter Routing Agent centralize’s LTE signaling. It route’s message’s between network element’s, balances load, hides internal topology from partner’s & enforces security, which keep’s roaming & interconnect traffic reliable. - What is SIGTRAN & why is it still important?
Ans.SIGTRAN carrie’s SS7 signaling over IP network’s. MVNO’s need it to exchange signaling with legacy voice & SMS partner’s for roaming, number portability & SMS delivery. - How can Comcode Tech help with MVNO core network development?
Ans.Comcode Tech combines telecom software development & consulting to design, build & integrate core network systems, from the HSS & DRA to the SMPP gateway, SMS firewall, USSD server & CAMEL gateway, tailored to your market & growth plans.
Conclusion
Building a core network for an MVNO is about more than connecting a few systems. It mean’s assembling a complete, reliable platform: a 3G, 4G/LTE or 5G core network, a Home Subscriber Server for subscriber control, a Diameter Routing Agent & SIGTRAN for signaling, an SMPP gateway for messaging, an SMS firewall to protect A2P revenue & service platforms like a USSD server & CAMEL gateway. Each component has to perform well on its own & work smoothly with the others.
The right approach start’s with strategy. Telecom consulting service’s help MVNO’s choose the right operating model, decide what to build, buy or manage & plan a clear path from 4G to 5G. Skilled telecom software development companie’s then turn that plan into working, scalable system’s that are ready for growth.
Comcode Tech brings both sides together, with telecom consultancy & hands-on engineering across core network, signaling & messaging solution’s. Whether you are launching a new MVNO or upgrading an existing network, the right architecture from day one lowers cost’s, reduces risk, & speed’s up your time to market.
Ready to build your MVNO core network? Contact Comcode Tech today to discuss your project & define the architecture that fits your market & growth goals.