TRAI Releases IDT Results for Bihar LSA, Assessing 2G–5G Performance Across Routes

The exercise captured real-world mobile network performance across diverse environments including urban zones, residential areas, institutions, hotspots, rail routes, and highways.

The Telecom Regulatory Authority of India (TRAI) has released the Independent Drive Test (IDT) results for the Bihar Licensed Service Area (LSA), based on extensive testing conducted across Hazaribagh district, highway routes between Ranchi and Patna, and the Patna–Ranchi railway corridor during 20–28 November 2025. The exercise captured real-world mobile network performance across diverse environments including urban zones, residential areas, institutions, hotspots, rail routes, and highways.

Supervised by TRAI’s Regional Office, Kolkata, the IDT covered:

• 220.9 km of city drive test routes

• 18 hotspot locations

• 2.1 km walk-test areas

• 327.5 km of highway routes along NH-19, NH-20 and NH-22

• 376.9 km of railway route testing

Multiple technologies—2G, 3G, 4G, and 5G—were assessed to reflect the experience of users with different handset capabilities. The IDT findings have been shared with all relevant telecom service providers (TSPs).

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Key Parameters Assessed

Voice Services:

• Call Setup Success Rate (CSSR)

• Call Drop Rate (DCR)

• Call Setup Time (CST)

• Call Silence Rate

• Speech Quality (MOS)

• Coverage

Data Services:

• Download/Upload Throughput

• Latency

• Jitter

• Packet Drop Rate

• Video Streaming Delay

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Overall Network Performance (City, Highway, Railway & Combined)

Call Setup Success Rate (CSSR %)

Provider	City	Highway	Railway	Overall
Airtel	99.65	100.00	81.48	96.63
BSNL	72.14	79.04	14.72	57.80
RJIL (Jio)	99.66	100.00	95.87	99.21
VIL	89.31	82.18	59.43	82.99

Drop Call Rate (DCR %)

Provider	City	Highway	Railway	Overall
Airtel	0.00	0.00	1.82	0.27
BSNL	8.54	9.09	11.32	6.79
RJIL (Jio)	0.34	0.00	4.31	0.79
VIL	7.75	9.09	23.08	8.73

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5G and Data Performance

In auto-selection mode across all technologies (2G/3G/4G/5G):

• Maximum Average 5G Download Speed: 199.26 Mbps

• Maximum Average 5G Upload Speed: 24.47 Mbps

Poor Signal Strength Observation (%) in Auto-Selection Mode

Provider	City Poor Signal (%)
Airtel	5.53
BSNL	46.10
RJIL (Jio)	4.52
VIL	23.98

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Geographical Coverage and Hotspot Testing

Tests spanned multiple areas of Hazaribagh and adjoining regions, including:Hadri, Kariyatpur, Harli Peto, Daru, Amnari, Kesura, Sita Garha, Hurhuru, Nawada, Hupad, Haram, Barkagaon, Pakri Barwadih, Jamuari, Pundri, Sultana, Gadokhar, Lupung, Dumraun, Mandai Khurd, Nawabganj and others.

Hotspot Evaluations included locations such as:

• Birla Institute of Technology, Mesra

• Hazaribagh Wildlife Sanctuary

• Civil Court & Head Post Office, Hazaribagh

• S.N. Sinha College, Jehanabad

• Vinoba Bhave University

• Shivaji Chowk, Vijaynagar, Ranchi

• Barachatti Post Office (Bihar)

• Powergrid Co. of India Ltd., Gaya… and several more.

Walk-tests were done at:

• Hazaribagh Town Railway Station

• Sadar Hospital, Hazaribagh

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Quality of Service (QoS) Assessment

Using TRAI-specified equipment and protocols, performance was evaluated for:

• CSSR, CST, DCR, MOS for voice

• Throughput, latency, jitter, packet loss for data

• Video streaming experience

The detailed findings enable TSPs to improve network coverage and QoS in Bihar LSA.

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Access to Full Report

The complete IDT report is available on TRAI’s official website:www.trai.gov.in

For further information, contact:Shri Kaushik Mukherjee, Advisor (Regional Office, Kolkata), TRAI📧 adv.kolkata@trai.gov.in☎️ +91-33-22361401