LTE

Using Dynamic Programming to Optimize Cellular Networks Modeled as Graphical Games

Cellular networks are often modeled using game theory, with base stations as players contending for a shared resource (the radio channel). Alternatively, if base stations are considered as nodes joined by edges (which represent significant …

DB-LBT: Deterministic Backoff with Listen Before Talk for Wi-Fi/NR-U Coexistence in Shared Bands

The legacy approach to solve coexistence problems between multiple wireless networks operating in the same frequency bands is through network planning. However, this approach is often unfeasible in unlicensed (shared) bands, where different network …

Using self-deferral to achieve fairness between Wi-Fi and NR-U in downlink and uplink scenarios

Wireless networks operating in unlicensed bands generally use one of two channel access paradigms: random access (e.g., Wi-Fi) or scheduled access (e.g., LTE License Assisted Access, LTE LAA and New Radio-Unlicensed, NR-U). The coexistence between …

No Reservations Required: Achieving Fairness between Wi-Fi and NR-U with Self-Deferral Only

Wireless technologies coexisting in unlicensed bands should receive a fair share of the available channel resources, even when they use different access methods. We consider the problem of coexistence between Wi-Fi and New Radio Unlicensed (NR-U) …

Downlink channel access performance of NR-U: Impact of numerology and mini-slots on coexistence with Wi-Fi in the 5 GHz band

Coexistence between cellular systems and Wi-Fi gained the attention of the research community when LTE License Assisted Access (LAA) entered the unlicensed band. The recent introduction of NR-U as part of 5G introduces new coexistence opportunities …

Revisiting LTE LAA: Channel Access, QoS, and Coexistence with WiFi

Network operators are looking toward LTE License Assisted Access (LAA) as a means of extending capacity by offloading traffic to unlicensed bands. However, operation in these bands requires abiding by certain coexistence rules in terms of channel …

Optimizing spectrum use in wireless networks by learning agents

This paper examines several distributed mechanisms that can be used in wireless networks consisting of base stations transmitting onto a population of receivers. The overall goal of the algorithms is to optimize a global measure: the sum of …

Impact of LTE's Periodic Interference on Heterogeneous Wi-Fi Transmissions

The problem of Wi-Fi and LTE coexistence has been significantly debated in the last years with the emergence of LTE extensions enabling the utilization of unlicensed spectrum for carrier aggregation. Rather than focusing on the problem of resource …