The real Chowkidar: Next Generation PPDR Communication Networks.

Excited to share that recently. I participated in a workshop on Next Generation Public Protection and Disaster Relief (PPDR) Communication Networks.

About PPDR:

PPDR supports a wide range of services such as maintenance of law and order, protection of life and property, disaster relief and emergency responses.  Broadband PPDR supports a wide range of applications, such as sending live images, videos, and texts, apart from voice communication. To keep a robust policy framework for broadband PPDR communication systems in the country, the Authority under section 11(1)(a)(ii) and (vii) of the TRAI Act, 1997 (as amended), had Sou-moto on 9th October 2017 issued a consultation paper (CP) on "Next Generation Public Protection and Disaster Relief (PPDR) communication networks'

There is an official mandate from the Department of Telecommunications (DoT) and the Ministry of Home Affairs (MHA), for the creation of a PPDR network, along with special focus on the 700 MHz spectrum allocation, which is vital for a dedicated PPDR network.

TRAI Recommendations

Service Provider network plays a pivotal role in the creation of a dedicated PPDR network over 5G.

TRAI also issued a consultation paper and invited responses and suggestions from the industry.

Based on the responses from the Industry, TRAI proposed recommendations. The salient features of the recommendations are:

1. Government to set up pan-India integrated Broadband PPDR (BB-PPDR) to be called as 'National BB-PPDR Network' based on 3GPP PS-LTE or the 5G technology.

2. Setting up a Special purpose Vehicle (SPV) under Ministry of Home affairs to plan and coordinate the nationwide BB-PPDR communication facilities for PPDR agencies.

3. SPV to coordinate with DoT for allocation of spectrum and other issues.

4. Pilot testing of BB-PPDR dedicated network at five zones identified as disaster prone/ sensitive areas to evaluate the efficacy of the proposed network.

5. 2×10 MHz of dedicated spectrum should be allocated nationwide to the SPV on no-cost basis for LTE or 5G based broadband PPDR networks.

6. 20 MHz of spectrum in the frequency range 440-470 MHz (preferably 450-470 MHz) should be allocated for future evolution of broadband PPDR.

1.       Strategic Context and Mandate for the BB-PPDR Network

The creation of the National BB-PPDR Network is mandated by the necessity to replace fragmented, voice-centric communication infrastructure with a unified, high-speed digital platform. This integrated network is designed on pan-India basis and based on the globally recognised 3GPP public safety LTE (PS-LTE) technology. With the advent of 5G, the creation of a dedicated PPDR network has become possible by the creation of a dedicated network slice on 5G network on a pan-India basis.

2.       The Policy Cornerstone: TRAI Recommendations and the NDCP Mandate

The PPDR network will overcome issues in legacy networks like TETRA or APCO 25, which suffer from poor interoperability, less coverage, inefficient spectrum use, and limited data capabilities.

The technological shift, moving away from voice-only narrowband networks, supports high-quality voice, robust data and real-time video streaming.

3.       Disaster Resilience and Telecom’s Critical Role

The MHA and DoT recognize telecommunications as central to all phases of disaster management—from preparedness and response to mitigation and recovery.⁶ The infrastructure serves as the essential backbone for coordination among first responders, state authorities, and the public.

DoT has already been instrumental in developing vital early warning systems, such as the Combined Alert Protocol (CAP), which ensures the rapid dissemination of warnings to reduce casualties. This system is a crucial element that will integrate with the future PPDR network. Furthermore, recent conferences and capacity-building exercises organized by In the past, DoT has been instrumental in organising workshops with similar institutes like the National Institute of Disaster Management (NIDM) and NTIPRIT in assessment on preparedness and resilience among all field units, including Telecom Service Providers (TSPs) and License Service Areas (LSA).⁶ The joint involvement of DoT, MHA, and NDMA in such forums confirms that the BB-PPDR network is strategically viewed not merely as a communication upgrade but as an integrated national security and governance project, mandating high levels of redundancy, security to withstand both natural disasters and cyber-attacks.

4.       Governance Structure and Operational Framework- Establishment and Function of the Special Purpose Vehicle (SPV)

A critical component of the governance model is the establishment of a Special Purpose Vehicle (SPV) operating under the MHA. This entity is tasked with coordinating the planning and nationwide implementation of the network, as well as steering its subsequent operation and maintenance.³

This SPV will serve as the nodal agency, responsible for coordinating directly with the DoT on key strategic issues, including spectrum allocation. It also ensures that all PPDR agencies (Police, Fire, EMS),  utilizing the network and the equipment deployed by them.

5.       The National BB-PPDR Hybrid Deployment Model

India has adopted a Hybrid Model of deployment to achieve a balance between coverage, cost-efficiency, and mission-critical reliability.⁴ This model separates the infrastructure into two distinct components:

a)      Dedicated Network Component: This component, fully funded by the Central Government, is intended for deployment by a Public Sector Undertaking (PSU) such as BSNL or MTNL.¹⁰ This dedicated infrastructure is strategically located in high-risk and sensitive regions, including:

a)      Metro cities

b)      Border districts

c)      Disaster-prone areas (identified by NDMA)

d)      Sensitive areas such as Jammu & Kashmir and the North East.

b)      Commercial Network Component: In all other regions across the country, existing private commercial mobile network operators (TSPs) will be leveraged. Operators are mandated to provide essential deployable assets, such as mobile Base Transceiver Stations (BTS) and backpack devices, which are crucial for maintaining communication facilities when terrestrial infrastructure is destroyed during disasters.

Table 1: BB-PPDR Hybrid Model: Allocation of Responsibility

Network Type	Geographic Scope	Funding Model	Implementing Agency (Proposed)	Key Requirements
Dedicated Network	Metro cities, border districts, disaster-prone, sensitive areas (J&K, North East)	Government Funded (Central)	PSU (BSNL/MTNL)	Dedicated Spectrum, High Resiliency, Full Govt. Control
Commercial Network	Rest of the country	Leveraging Existing TSPs	Private/PSU Mobile Network Operators (MNOs)	Stringent SLAs, Mandate for Deployable Assets (Mobile BTS, Backpacks)

To fulfill the requirements for a nationwide BB-PPDR network that supports high-bandwidth applications, a dedicated, paired allocation of 2x10 MHz of spectrum is necessary for providing the capacity needed for real-time video and data services, alongside dynamic reconfiguration capabilities essential for managing load during an emergency.

6.       The 700 MHz Band Allocation Conflict

A significant regulatory challenge has emerged due to competing demands for the 700 MHz spectrum. TRAI has analyzed stakeholder proposals that advocate for allocating 5 MHz (paired) spectrum in the 700 MHz band to Indian Railways. This allocation is sought for implementing critical safety systems, including ETCS Level-2, Mission Critical Push-to-Talk (MC PTT), and live video surveillance systems.

The contention arises because reserving 5 MHz for the Railways could potentially reduce the dedicated national BB-PPDR allocation to 2x5 MHz. This constraint would critically limit the network’s ability to support high-throughput mission-critical applications, such as multi-stream video surveillance and high-resolution imaging, which are foundational to the operational enhancement sought through broadband adoption.

Furthermore, the request by the Railways to utilize spectrum reserved for PPDR services suggests an inherent policy recognition that rail safety applications are functionally equivalent to public safety requirements.

7.       Technological Architecture: 3GPP PS-LTE and Mission Critical Services (MCX)

The National BB-PPDR Network is being architected based on 3GPP standards, ensuring compliance with Mission Critical Communication (MCX) protocols, and is actively incorporating next-generation 5G capabilities, with a strong focus on domestic technological development.

8.       Foundation: PS-LTE and the MCX Suite

The selection of PS-LTE ensures that the network delivers stringent performance requirements regarding reliability, availability, security, and Quality of Service (QoS).¹⁵ The core MCX services driving the new network are:

a)      Mission Critical Push-to-Talk (MCPTT): This service enhances the traditional walkie-talkie functionality with instantaneous call setup, targeting latency below 300 milliseconds for immediate group and broadcast communications.

b)      Mission Critical Data (MCData): This supports advanced capabilities such as location sharing, enhanced messaging, and the transmission of high-resolution images and real-time situational data.

c)      Mission Critical Video (MCVideo): Provides secure, reliable, low-latency audio/video feeds, essential for remote command and control, and real-time intelligence gathering.

9.       Indigenous Development and C-DOT’s Role

In a major push toward self-reliance, the Centre for Development of Telematics (C-DOT) is leading the charge to develop a completely indigenous MCX solution. C-DOT has established an MCX Alliance, engaging with approximately 10 partner organizations, primarily startups, to build a domestic ecosystem. A notable partnership involves M/s NAM InfoCom Private Limited for the joint development of the MCX system, including specialized MC Video solutions, fully funded under the C-DOT Collaborative Research Programme (CCRP)

10.   Advanced Capabilities: Leveraging 5G Enablers

The architecture is designed to be fully compatible with 4G and 5G networks, positioning India to exploit advanced capabilities. 5G networks offer technical foundations crucial for MCX, including ultra-low latency (sub-millisecond), exceptionally high availability (99.999%), and high broadband throughput exceeding 100 Mbps per user.

11.   Key 5G technical enablers integrated into the planning include:

a)      Network Slicing: This guarantees deterministic Quality of Service (QoS) by allowing the network to allocate dedicated, isolated resources for high-priority PPDR traffic, even during periods of extreme commercial network congestion and public network shutdown scenarios.

b)      Ultra-Reliable Low-Latency Communications (URLLC): Ensures the near-instantaneous response necessary for remote control and real-time operational directives.

c)      Non-Terrestrial Network (NTN) Integration: Critical for maintaining seamless connectivity in disaster scenarios where terrestrial infrastructure has been destroyed or serving in remote, underserved areas.

Table 2: Key Mission Critical Services (MCX) Requirements

Parameter	3GPP PPDR Standard	India’s Operational Necessity	Supporting Technology (PS-LTE/5G)
Availability	99.999%	Flawless operation in hostile/disrupted environments	Redundancy, Network Slicing
Latency (MCPTT)	< 300 ms (Call Set-up)	Real-time command and control, instantaneous PTT	PS-LTE core, Edge Computing
Capacity	Broadband (> 100 Mbps per user)	Transmission of MCVideo, High-Resolution Imagery, Sensor Data	High Throughput, Dedicated Spectrum (2x10 MHz)
Security	End-to-End Encryption, Integrity Protection	Protection of sensitive operational and public safety data	3GPP Security Features, Domestic Encryption Support
Interoperability	Common 3GPP Standard	Seamless coordination across Police, Fire, EMS, and NDRF agencies	Unified Network Core (EPC/5GC)

12.   Technology Pilots and Proof-of-Concepts (PoCs)

Pilot testing is a mandatory precursor to full-scale deployment, specifically required for the dedicated network component to be implemented by BSNL/MTNL in five strategically identified disaster-prone/sensitive zones.

Further validation of the advanced technology has been achieved through private sector initiatives. A successful proof-of-concept for 5G-based mission-critical communications was demonstrated by Tidal Wave Technologies and Consort Digital at the Amlohri Coal Mine, operated by Northern Coalfields Limited (NCL). The pilot successfully integrated Consort Digital's MCX ONE platform over a private 5G network provided by Tidal Wave, connecting 5G drones, cameras, and environmental sensors.

This confirms the availability of a robust domestic vendor pool, providing confidence in the viability of C-DOT’s indigenous MCX Alliance strategy for the public safety rollout.

13.   Equipment and Operational Security

The network demands a specialized ecosystem of user equipment. Handsets must be ruggedized and weather-resilient to ensure operational reliability in extreme environments. Infrastructure policies are being developed rapidly to mandate security, encryption, redundancy, and resilience against failures and cyber-attacks. Required security measures include end-to-end encryption, support for domestic encryption algorithms, authentication processes for users and networks, and integrity protection against unauthorized intrusion.

14.   Conclusion

The development of the National Broadband PPDR Network in India has matured from a necessary policy objective to an active, well-defined implementation project. The latest developments confirm a strong commitment to adopting 3GPP PS-LTE technology via a resilient Hybrid Model, ensuring dedicated government control over critical operational areas while leveraging private commercial networks for wider coverage..

The remaining critical challenges revolve around strategic resource allocation, particularly resolving the competing spectrum demands in the 700 MHz band to ensure the necessary 2x10 MHz bandwidth for high-capacity applications. Furthermore, while the technology standard guarantees technical interoperability, the long-term success of the BB-PPDR network will ultimately be determined by standardized operational protocols and overcome entrenched bureaucratic resistance to information sharing across disparate public safety agencies. This network promises to fundamentally transform India's disaster management and public safety capabilities, provided these governance and logistical challenges are navigated successfully during the execution phase.