The ULAK 4.5G Base Station is a fully integrated LTE Advanced radio access network (RAN) solution developed with a high domestic engineering content ratio. It is designed not only as a commercial telecom product but also as a strategic national infrastructure asset aimed at ensuring technological sovereignty in communication systems.

Operational Role and Mission

ULAK’s primary mission is to deliver high-speed LTE broadband, voice over LTE (VoLTE), IP-based multimedia services, and secure communication capabilities for both civilian and critical public services.

Operational deployment scenarios include:

• Commercial nationwide LTE coverage
• Rural and universal service regions
• Public safety communication
• Disaster and emergency communication infrastructure

Thus, ULAK is positioned as both a commercial telecom solution and a national resilience enabler.

Doctrine and Concept of Use

The system operates within three main strategic layers:

• Commercial LTE capacity and urban data density
• Rural broadband expansion and universal service coverage
• Secure communication backbone for governmental and critical infrastructures

Unlike conventional foreign-supplied base stations, ULAK’s software control and core intellectual property are domestically managed, which strengthens cybersecurity and strategic independence.

System Architecture

The ULAK 4.5G system consists of three main components:

Remote Radio Unit (RRU)

The RRU handles RF signal generation, amplification, and antenna transmission. It supports multiple frequency bands and enables 2x2 and 4x4 MIMO configurations. The system delivers up to 4x40W RF output power, allowing extended coverage and enhanced signal penetration.

Baseband Unit (BBU)

The BBU hosts LTE Layer 1–2–3 protocol stacks and manages critical functions such as:

• Radio Resource Management (RRM)
• Scheduling and QoS control
• Handover management
• Traffic prioritization

It supports 4x4 MIMO with 20 MHz LTE bandwidth and provides sector capacity ranging from 300 Mbps to 900 Mbps, depending on configuration.

The system supports up to 18 CPRI interfaces, enabling flexible multi-RRU deployments.

Network Integration

ULAK connects to the Evolved Packet Core (EPC) through standard S1 interfaces. It is compatible with existing operator backhaul infrastructures and integrates seamlessly with IP-based transport networks and OSS systems.

Survivability and Security Approach

One of ULAK’s primary advantages is its domestically controlled software stack. This provides:

• Reduced backdoor risks
• National-level cybersecurity control
• Independent software updates and lifecycle management

Detailed encryption algorithms and hardened cybersecurity modules are not publicly disclosed.

Performance and Capacity

• 4x4 MIMO support
• Up to 20 MHz LTE bandwidth
• 300–900 Mbps sector throughput
• Multi-band and multi-operator deployment capability

Latency values are within standard LTE performance ranges; specific millisecond figures are not publicly available.

Ecosystem Integration

The ULAK 4.5G Base Station is actively deployed in the networks of:

• Turkcell
• Vodafone Türkiye
• Türk Telekom

It operates in live commercial environments and supports national broadband expansion strategies.

Detailed Technical Specifications

Supported Frequency Bands

• 800 MHz (Band 20)
• 1800 MHz (Band 3)
• 2600 MHz (Band 7)
• Planned: 2100 MHz (Band 1)

Power Consumption

• 800 MHz: 200W / 300W
• 1800 MHz: 400W / 700W
• 2600 MHz: 450W / 750W

RF Output Power

• Maximum 4x40W RF output
• 2x2 and 4x4 MIMO configurations

Channel Bandwidth Options

• 1.4 MHz
• 3 MHz
• 5 MHz
• 10 MHz
• 15 MHz
• 20 MHz

LTE Compliance

• 3GPP Release 10
• 3GPP Release 11

Sector Capacity

• 300 Mbps to 900 Mbps (configuration dependent)

CPRI Support

• Up to 18 CPRI ports

Command, Control and Management

• LTE RRM
• QoS enforcement
• IP-based backhaul
• OSS integration

Advanced cybersecurity architecture details are not publicly disclosed.

Frequently Asked Questions

What is the ULAK 4.5G Base Station used for?

• It provides LTE broadband connectivity, voice services (VoLTE), and IP-based multimedia communication. It supports both commercial operators and critical infrastructure communication needs.

What is its coverage range?

• Exact cell radius values are not publicly disclosed. As a macro LTE base station, coverage can extend several kilometers depending on frequency band, antenna height, and transmission power.

How many users can it support simultaneously?

• Sector capacity ranges from 300–900 Mbps. The number of simultaneous users depends on traffic profiles but can support hundreds of concurrent active subscribers within LTE standards.

Is it 5G compatible?

• The current version is LTE Advanced (4.5G). 5G NR capability is addressed in separate next-generation ULAK product lines.

Is it secure?

• Yes, due to domestic software control and national cybersecurity governance. Specific encryption and hardening details are not publicly available.

Who are its global competitors?

• Major LTE infrastructure vendors include Ericsson, Huawei, and Nokia. ULAK’s primary distinction is national sovereignty and domestic software control.

Sources

• Official publications and technical documents of ULAK Haberleşme A.Ş.
• Operator deployment announcements
• 3GPP Release 10 and Release 11 LTE documentation
• Publicly available technical presentations