Spectrum Allocation Strategies

The rapid expansion of #5G and #6G networks and the anticipated evolution toward 6G technology necessitate the timely allocation of additional spectrum resources. A key focus is the 3GPP 6GHz band (6,425–7,125 MHz) n102 & n104, which is essential for enhancing network capacity and coverage in India. Telecom operators have urged the Indian government to allocate this spectrum for International Mobile Telecommunications (IMT) and integrate it into the National Frequency Allocation Plan (NFAP) to facilitate 5G expansion. The 6 GHz spectrum, alongside existing sub-6 GHz bands, plays a crucial role in enabling carrier aggregation, allowing seamless integration of low-band (700 MHz, 850 MHz, 900 MHz) for better indoor coverage and uplink performance, and mid-band (3–5 GHz) for enhanced capacity. Despite its importance, a portion of the 6 GHz band is currently used for satellite operations by the Indian Space Research Organization (ISRO), presenting regulatory and technical challenges. To address this, the Wireless Planning and Coordination (WPC) wing of India’s Ministry of Communications has initiated a strategic evaluation to assess the feasibility of allocating this band for mobile services. Additionally, the Cellular Operators Association of India (COAI) has reinforced the need for expedited spectrum assignment to support nationwide 5G deployment. Recent India government actions indicate progress in spectrum allocation, with the Indian government auctioning 141 MHz of spectrum across multiple bands, including 800 MHz, 900 MHz, 2.1 GHz, 3.3 GHz, and 26 GHz in June 2024. However, for India to fully capitalize on 5G and future 6G advancements, an urgent policy decision on the 6 GHz spectrum is required. Allocating this band to commercial mobile services will not only strengthen 5G networks but also lay a strong foundation for 6G, ensuring India's leadership in next-generation telecommunications.

Resource Units and Distributed Resource Units in Wi-Fi Modern Wi-Fi networks, especially Wi-Fi 6 (802.11ax) and Wi-Fi 7 (802.11be), face the challenge of efficiently sharing spectrum among multiple users. The traditional one user per channel approach wastes opportunities when devices have small data demands. This is where Resource Units (RUs) and Distributed Resource Units (DRUs) come in, mechanisms that slice the spectrum into flexible portions so multiple users can transmit simultaneously. A Resource Unit (RU) is a portion of the frequency spectrum assigned to a single user in an OFDMA system. Instead of dedicating the entire channel to one device, Wi-Fi can divide a 20, 40, 80, or 160, and 320 MHz channel into smaller blocks. Each block is an RU, which can range in size from 26 tones up to 996 tones in Wi-Fi 6, and larger in Wi-Fi 7. RUs allow multiple devices to transmit in the same time slot but on different frequency slices, improving spectral efficiency and reducing latency. For example, in an apartment, several phones, laptops, and IoT devices can upload small packets simultaneously rather than waiting for an entire channel to be free. A Distributed Resource Unit (DRU) is an RU whose subcarriers are distributed across the channel rather than contiguous. DRUs are introduced in Wi-Fi 7 to increase flexibility and improve frequency diversity. By spreading the allocation over the channel, DRUs allow the access point to adaptively assign portions to users in a way that mitigates interference and multipath fading. DRUs improve OFDMA scheduling flexibility and frequency diversity, helping Wi-Fi 7 serve ultra-low latency traffic and high-throughput users more efficiently, while operating alongside features like Multi-Link Operation. Why RUs and DRUs are Needed -Multi-user efficiency: Not all devices need the full channel. Small RUs allow low-data devices to transmit without blocking high-demand users. -Reduced latency: By allowing simultaneous transmissions, devices avoid queuing delays which is critical for gaming, AR/VR, and industrial IoT. -Frequency diversity: DRUs spread signals over the channel, reducing the impact of fading and interference. Wi-Fi 6 (802.11ax) introduced OFDMA and RUs. Fixed RU sizes include 26, 52, 106, 242, 484, and 996 tones. The standard defines allocation rules, preamble signaling, and subcarrier mapping to ensure orthogonality and minimize interference. Wi-Fi 7 (802.11be) introduces DRUs and wider channels up to 320 MHz, supporting distributed allocation of subcarriers for multi-link operation. DRUs require precise timing, accurate channel state information, and low processing latency to ensure multiple transmissions align correctly and avoid collisions. In short, RUs and DRUs allow more devices to share spectrum efficiently, reduce delays, and optimize performance in dense environments. Without them, modern Wi-Fi would struggle to support the explosion of simultaneous users and high-bandwidth applications.

$ASTS: S-Band spectrum priority rights under the ITU — Potential Impact in Europe The AST SpaceMobile announcement on August 6, 2025, details an agreement to acquire an entity holding global S-Band spectrum priority rights under the International Telecommunication Union (ITU) for Mobile Satellite Services (MSS) in the 1980–2010 MHz (uplink) and 2170–2200 MHz (downlink) frequency bands. These rights, intended for low Earth orbit (LEO) operations, could add up to 60 MHz of mid-band spectrum to AST SpaceMobile's portfolio, complementing its existing 3GPP cellular spectrum strategy and planned L-Band access in regions like the U.S. and Canada. The deal, valued at $64.5 million (payable in stock or cash, with $26 million upfront and $38.5 million deferred, partially milestone-based), is expected to close in the second half of 2025, subject to customary conditions. This acquisition could significantly influence Europe's satellite communications landscape, particularly for direct-to-device (D2D) or direct-to-cell (D2C) services, where satellites connect directly to unmodified smartphones. Europe's 2 GHz MSS band (the same frequencies) is currently allocated under a harmonized EU framework, with authorizations expiring in May 2027. The Radio Spectrum Policy Group (RSPG) is reviewing future uses, including non-terrestrial networks (NTN) for D2D, IoT, and broadband. AST SpaceMobile, already identified as a stakeholder in RSPG consultations for D2D/M2M services, could leverage these ITU priority rights to strengthen its position. Regulatory and Licensing Opportunities Acquiring ITU priority rights (which underpin satellite coordination globally) positions AST to pursue EU-level authorizations post-2027. Current holders—EchoStar Mobile (formerly Solaris Mobile, 1995–2010 MHz uplink/2185–2200 MHz downlink) and Viasat (formerly Inmarsat, 1980–1995 MHz uplink/2170–2185 MHz downlink)—face expiration, with RSPG recommending scenarios like band segmentation for new entrants or integration with projects like IRIS² (EU's secure satellite constellation). If the acquired entity relates to one of these (e.g., EchoStar's holdings, given their global S-Band ITU filings), AST could inherit or renew rights, subject to national approvals and CEPT coordination. However, this requires navigating EU consultations (ongoing through Q2 2025) and potential competition for reallocation, with interference management rules to protect adjacent terrestrial services (e.g., 3G/4G in 1920–1980 MHz/2110–2170 MHz). Overall, this positions AST as a key player in Europe's NTN ecosystem, potentially launching consumer services by early 2026 if regulatory hurdles are cleared, aligning with Vodafone's push for space-based coverage. For real-time updates, monitor the European Commission's spectrum consultations or AST's filings with national regulators like Ofcom (UK) or ARCEP (France).

Asia is showing the world a simple truth. 5G leadership is no longer about owning spectrum. It is about using it intelligently. Many operators still chase raw MHz as if that alone will deliver differentiated performance. Asia’s leaders are proving otherwise. They are winning by mastering carrier aggregation and spectrum innovation to unlock more value from the assets they already have. The takeaway for telecom professionals is: Competitive advantage now comes from spectrum efficiency, not spectrum quantity. From Japan’s multi-layer aggregation with mmWave, to Korea’s triple-band 5G NR, to India’s early 700 MHz and 3.5 GHz pairings, the message is consistent. Thoughtful spectrum strategy produces meaningfully better user experience, stronger enterprise SLAs, and a smoother path to 5G-Advanced and AI-driven automation. After three decades in network engineering, I have seen this pattern repeat. Operators that treat spectrum as a strategic system outperform those that treat it as a set of disconnected bands. Carrier aggregation is the bridge between today’s fragmented assets and tomorrow’s enterprise-ready 5G platforms. How are you seeing carrier aggregation impact network performance in your market? #5G #TelecomStrategy #NetworkEngineering #SpectrumManagement #5GAdvanced

Why Frequency Planning is Critical Spectrum Scarcity: Limited microwave spectrum requires efficient allocation to maximize network capacity Interference Prevention: Proper planning eliminates co-channel and adjacent channel interference Regulatory Compliance: Adherence to national and international frequency regulations (ITU-R) Key Frequency Planning Principles Frequency Band SelectionChoose appropriate bands based on :Path length requirements (lower frequencies for longer hops) Capacity needs (higher frequencies support more channels) Terrain and regulatory availability Rain fade considerations (higher frequencies more susceptible) • Channel Bandwidth AllocationStandard channel spacings: 3.5, 7, 14, 28, 56 MHz Higher bandwidth = higher capacity but shorter range Adaptive channel sizing based on traffic demands Consideration of guard bands between channels • Flexible Channel ArrangementsSoftware-defined channelization in modern equipment Asymmetric channel pairs for unbalanced traffic Co-channel operation with XPIC (Cross-Polarization Interference Cancellation) Dynamic channel adjustment based on real-time conditions • Channel Aggregation Multiple channels combined for higher capacity E1/T1 bundling in traditional systems Ethernet carrier aggregation in modern systems N+0, N+1 protection schemes Interference Management in Channelization • Co-Channel Interference Minimum coordination distance calculations Antenna discrimination and sidelobe suppression XPIC technology enabling same-frequency reuse Power control and adaptive transmit power • Adjacent Channel Interference Guard band requirements Filter roll-off characteristics Channel spacing optimization Spectral regrowth management • Intermodulation Products Third-order intermodulation distortion prevention Passive intermodulation (PIM) mitigation Multi-carrier operation considerations Frequency Coordination Process • Path AnalysisLine-of-sight verification Fresnel zone clearance Terrain and clutter database integration Potential interferer identification • Coordination Studies Automated coordination tools (Pathloss, Radio Mobile) Worst-case interference scenarios Carrier-to-interference (C/I) ratio calculations Coordination agreements with neighboring operators • Multi-Gigabit Channelization112+ MHz channels for high-capacity backhaul Multi-gigabit Ethernet microwave links Sub-6 GHz massive MIMO microwave mmWave channelization (V-band, E-band) • Diversity and ProtectionFrequency diversity for fade protection 1+1 protection channel allocation Ring and mesh protection frequency planning Tools and Methodologies • Planning SoftwareRadio planning tools (Atoll, Planet, Pathloss,mentum) Emerging Trends Dynamic Spectrum Access: Cognitive radio techniques for opportunistic spectrum use mmWave Channelization: Ultra-wide channels (250-500 MHz) for 5G backhaul

Dynamic Spectrum Sharing (DSS) was one of the smartest transition tools in the move from 4G to 5G. At its core, DSS allowed operators to run LTE and 5G NR on the same spectrum carrier, dynamically assigning resources based on real-time demand. That mattered because operators didn’t need to wait for fully cleared or newly dedicated 5G spectrum to start expanding 5G coverage. Instead, they could reuse existing low-band LTE assets and accelerate rollout while continuing to support 4G users. 3GPP standardized DSS as part of the LTE-to-NR migration path, which is why it became such an important enabler in early 5G deployment. ⭕ In the early 5G phase, coverage was often more valuable than peak speed. DSS helped operators launch 5G faster, extend reach in existing bands, and make better use of spectrum already in service. It gave the industry a practical bridge between legacy LTE networks and next-generation NR. ⭕ But DSS also came with trade-offs. Sharing the same carrier between LTE and NR introduces signaling overhead, scheduler complexity, and coexistence constraints. In practice, this means DSS can reduce spectral efficiency compared with dedicated 5G spectrum. ⭕ Technically, who decides whether the next shared resource goes to LTE or 5G? The coordinated base-station scheduler does — dynamically, based on real-time traffic demand, user load, and coexistence constraints. ⭕ Operators that rely heavily on DSS can provide broader 5G coverage, but they may not always offer the strongest 5G speeds or capacity compared to cleaner, dedicated NR deployments. This approach slightly impacts the performance of both 4G LTE and 5G NR, by about 25% and 15%, respectively. However, this performance reduction is often justified by the availability of the full spectrum for both networks. So DSS was not the final 5G destination — it was the transition strategy that made the large-scale launch of 5G possible. 📷 Based on Samsung technical white paper #5G #DSS #Spectrum #LTE #Telecom #Wireless #NetworkStrategy #RAN

Dear All: We would like to share with you a report that we just completed for the Dynamic Spectrum Alliance, entitled “Assessing of the economic value of the 6GHz spectrum band in India”. This report examines the potential economic impact of allocating different portions of the 6 GHz spectrum band in India to Wi-Fi and mobile telecommunications use. This proposal emerges as India’s Department of Telecommunications considers how to open this spectrum for license-exempt use. The study evaluates three spectrum allocation alternatives for the 6 GHz band: 1. Full allocation (1200 MHz) for Wi-Fi: This scenario estimates the benefits of allocating the entire band to Wi-Fi, generating impacts on productivity, cost savings, faster connectivity, and support for the digital economy. 2. Split spectrum allocation (500 MHz for Wi-Fi and 700 MHz for IMT): This mixed option analyzes dedicating part of the spectrum (500 MHz) to Wi-Fi and another part (700 MHz) to mobile operators, assessing the impact on Wi-Fi services and revenue generation through spectrum auctions for IMT (5G/6G). 3. Majority allocation to Wi-Fi (1100 MHz for Wi-Fi and 100 MHz for IMT): This alternative allows Wi-Fi to use a larger portion (1100 MHz), leaving a smaller portion (100 MHz) for IMT. The report concludes that full allocation of the band to Wi-Fi would generate the greatest economic value, stimulating India’s digital economy through increased GDP, cost reductions for consumers and businesses, and expansion of digital infrastructure. It also considers the opportunity costs and policy implications. It also highlights that delays in decision-making could limit potential economic benefits until after 2029. Link: https://lnkd.in/eE6gpUxW