At the dawning of a new era for mobile communications, the continuous demand for a wealth of smart applications and emerging uses cases, including enhanced Mobile Broadband Applications (eMBB), Ultra Reliable Low Latency Communication (URLLC) and Machine to Machine (MtM) communications, has been stressing the operators’ legacy infrastructure. Indicatively, Key Performance Indicators (KPIs) by expert alliances already forecast stringent and widely varying requirements, including >400MHz radio channel bandwidths, 1Gb/s user rates, 10Gb/s peak traffic to the antenna-site, <10ms latency etc, necessitating rapid advances both in the wireless and optical domain. In the wireless domain, multiple new Radio Access Technologies (multi-RAT) at millimeter wave (mmWave) frequencies, e.g. Ka-/V-/E-/D-band, with higher spectral bandwidths at lower cell-radii are being actively investigated, while the rise of the 6G era is already forecasting abundant optical capacity resources to the antenna sites that need to be recirculated through the fiber-network. Hence, there is a strong academic and industry consensus that increased network flexibility and scalability will be the key characteristics of future 5G/6G network deployments, in order to support flexible allocation of the optical and wireless resources and effectively accommodate diverse services. The current talks aims to present a holistic architecture with developments on integrated photonic technologies and wireless communication systems, that may enable high capacity, low-latency communications links in a flexible Fiber Wireless network for the 5G/6G era.