Cross-border interference in radio communication networks has emerged as a pressing challenge for Bangladesh, a nation with complex and zigzag international borders shared with India and Myanmar. The issue arises when radio frequency signals from neighboring countries spillover into Bangladesh's territory and vice versa, disrupting domestic networks and degrading the quality of services for local users in respective countries. This interference impacts essential communication services and creates barriers to the efficient utilization of spectrum resources. With the advent of advanced radio communication technologies like 5G, the need for effective cross-border coordination has become more critical than ever. This article explores the nature of cross-border interference in Bangladesh, its underlying causes, and the collaborative efforts required to mitigate its impact and ensure seamless communication across borders.
The situation became increasingly critical after 2015, when interference issues emerged in the EGSM band (885-890 MHz). Signals from mobile operators in a neighboring country overlapped with the uplink frequencies used by Bangladeshi operators. This overlap was particularly severe in border regions such as Sylhet and Rajshahi, where strong downlink transmissions from the neighboring country's base stations penetrated deeply into Bangladeshi territory. These intrusions caused significant service disruptions, including frequent call drops and poor quality of service (QoS) for local cellular networks. The interference was first detected in November 2015, with a surge in complaints from the Brahmanbaria region. During the field tests, it was confirmed that the source of the interference was the powerful downlink signals from the neighboring country's base stations, which extended up to 60 kilometers into Bangladeshi territory. Despite efforts to address the issue-such as reconfiguring frequencies and adjusting antenna orientations-these measures only provided temporary relief. The problem persisted, causing continued customer dissatisfaction and operational challenges for local operators, necessitating sustained regulatory and technical intervention.
A similar pattern of interference was observed that affected a major Broadband Wireless Access (BWA) operator in Bangladesh. This issue began in September 2015 and was concentrated in areas such as Rajshahi, Sylhet, Rangpur, and Chittagong, all located near the Bangladesh border. Interference in this frequency band disrupted internet services for thousands of customers, causing slow speeds, frequent disconnections, and even authentication failures. Investigation through field tests revealed that signals from operators of the neighboring country were likely sources of the interference.
Despite some temporary relief achieved through technical measures such as antenna reorientation, frequency reallocation, and power adjustments, the root cause-overlapping frequency allocations and strong cross-border signal propagation-remained unresolved. This situation highlighted the limitations of unilateral technical fixes and emphasized the need for bilateral collaboration.
Very recently, during the routine spectrum monitoring drive tests, intrusion of the neighboring country's mobile operator networks into Bangladeshi territory was found. These drive tests were carried out in various border districts, including Rajshahi, Chapai Nawabganj, Naogaon, Dinajpur, Thakurgaon, Panchagarh, Nilphamari, and Lalmonirhat. The findings revealed significant signal penetration from neighboring country's cellular mobile operators with signals detected up to 4 kilometers inside Bangladeshi territory.
Cross-border radio frequency (RF) interference has significant implications for Bangladesh, particularly in border regions. It affects telecommunications, economic activities, national security, and the ongoing refugee situation. Below is a detailed analysis in this regard:
Telecommunications Disruptions:
Degraded Services in Border Areas: Frequent disruptions such as call drops, reduced internet speeds, and poor signal quality occur in the borders regions, degrading the QoS of the operators.
Impact on Local Operators: Bangladeshi telecom operators face challenges in maintaining stable networks and often need to invest in costly adjustments like frequency retuning and advanced equipment.
Customer Dissatisfaction: Residents in border regions experience unreliable services, leading to frustration and complaints, with businesses facing delays and reduced productivity.
Economic Consequences:
Revenue Losses for Operators: Reduced usage in border areas leads to decreased revenues for Bangladeshi telecom operators.
High Costs of Mitigation: Operators incur significant expenses for technical interventions to counteract interference.
Operator Hesitation: Persistent interference and unresolved spectrum issues deter telecom operators from making significant investments in new infrastructure in border areas.
Business Productivity Issues: Communication challenges hinder cross-border trade and local businesses reliant on seamless telecommunications.
National Security Risks:
Disrupted Emergency Communication: Interference impacts communication systems used by law enforcement and emergency services, weakening response capabilities during crises.
Unauthorized Network Access: Signal spillover from neighboring countries allows unauthorized access to foreign networks, posing risks of illegal activities such as smuggling and unmonitored VoIP operations.
Unregulated Communication in Refugee Camps: Cross-border signals enable the use of foreign networks by Rohingya refugees in camps along the Myanmar border, complicating efforts to regulate communication. The availability of unauthorized networks may facilitate criminal activities, misinformation, and unrest within refugee communities.
Technological and Regulatory Challenges:
Spectrum Inefficiency: Persistent interference in key bands reduces the effective utilization of Bangladesh's spectrum resources.
Delays in Advanced Technology Deployment: Challenges in harmonizing spectrum usage with neighboring countries delay the rollout of emerging technologies like 5G.
Social Consequences:
Widening Digital Divide: Rural and border areas suffer from subpar communication services, exacerbating inequalities in access to education, healthcare, and economic opportunities.
Public Frustration: Frequent disruptions erode trust in telecom services, discouraging the adoption of new technologies.
Limited Access to Information and News: Unreliable internet connectivity in border areas can restrict residents' access to vital information and news updates, hindering awareness and participation in current events.
Globally, frameworks like the International Telecommunication Union (ITU) Radio Regulations provide foundational guidelines for managing cross-border interference. These frameworks include principles for frequency allocation, interference resolution, and coordination protocols. Regional organizations such as the Asia-Pacific Telecommunity (APT) and the European Telecommunications Standards Institute (ETSI) play a crucial role in promoting harmonized policies and technical standards. Bilateral and multilateral agreements, such as those implemented in Europe and the Gulf region, offer examples of effective coordination. These agreements often include provisions for joint monitoring, frequency assignment planning, and dispute resolution mechanisms.
Some countries conduct routine measures such as drive tests, frequency retuning, and buffer zone creation, but the lack of formal bilateral or multilateral agreements hinders consistent resolution. For example, countries like Bangladesh and Pakistan have established buffer zones of 3 km near borders to control signal spillover, while others have no defined limits. Harmonization of national frequency allocation plans with international standards is critical to prevent frequency overlaps.
The ITU provides several key recommendations to mitigate cross-border interference. These include the development of formal agreements between neighboring countries to establish clear technical parameters, such as power levels and antenna orientations, and the introduction of region-wide Standard Operating Procedures (SOPs) for detecting and resolving interference. Strengthening bilateral and multilateral dialogues is also crucial for facilitating technical data sharing and joint problem-solving. Furthermore, the adoption of advanced spectrum monitoring technology and the exploration of flexible spectrum-sharing models are suggested as proactive measures to reduce interference and optimize spectrum use.
To effectively address the persistent issue of cross-border interference, Bangladesh may adopt a forward-looking strategy that combines technical innovation, regulatory enhancement, and diplomatic cooperation. Strengthening spectrum monitoring capabilities is a critical first step. This can be achieved by deploying advanced tools and establishing monitoring stations near border areas to detect and analyze interference in real-time. Buffer zones, created through precise frequency planning and power control, can help minimize signal overspill from neighboring countries. On the regulatory side, harmonizing frequency allocation plans with international guidelines, such as those from the ITU, will ensure seamless spectrum management and prevent overlaps. Bangladesh may actively engage in bilateral discussions with neighbors like India and Myanmar to formalize agreements on technical parameters such as antenna orientation and transmission power limits. These agreements must also include mechanisms for joint spectrum monitoring, dispute resolution, and coordinated efforts to deploy new technologies like 5G.
Strengthening the Bangladesh Telecommunication Regulatory Commission (BTRC) through capacity building, advanced training, and adequate resources is equally essential to enforce these measures effectively. Public-private partnerships can play a crucial role, allowing telecom operators to collaborate on innovative solutions for mitigating interference while ensuring better service quality in border regions. Additionally, participating in regional forums, such as those led by the South Asian Telecommunication Regulators' Council (SATRC) and APT, can enable Bangladesh to align its strategies with best practices and technological advancements, ensuring a robust response to emerging challenges.
Cross-border interference remains a significant challenge for Bangladesh, with far-reaching implications for telecommunications, economic stability, and national security. As emerging technologies such as 5G and other advanced technologies become integral to connectivity, the risks associated with interference will only grow, requiring robust and proactive management by the government and the regulator. Effective cross-border interference mitigation demands a balanced approach that includes technical precision, regulatory rigor, and diplomatic collaboration. Bangladesh must also focus on adopting advanced spectrum monitoring tools and fostering international cooperation to address the increasing complexity of interference issues for a stable and secure connectivity ecosystem. Without these measures, service quality in border regions will degrade, hindering economic development and exacerbating inequality in access to digital resources. This holistic approach will not only mitigate the immediate challenges of interference but also safeguard its technological and economic future position, facilitating Bangladesh to become a leader in regional telecommunications coordination and innovation.
The writer is an Army Officer
