###### Abstract  
In this paper, the reasons for the bandwidth and wavelength utilization in future next-generation passive optical networks are presented, and the possibilities for realization and utilization of extended dynamic wavelength and bandwidth algorithms for the second next-generation passive optical networks (NG-PON2) are analyzed. Next, principles of the effective dynamic bandwidth allocation are introduced in detail, focused on the importance of the decision criterion optimization. To achieve a better bandwidth utilization of dedicated wavelengths in NG-PON2 networks, this paper is focused on the novel effective dynamic bandwidth allocation algorithm with adaptive allocation of wavelengths to optical network units as well as the optimization of the decision criterion. The algorithm and the proposed method are tested and evaluated through simulation with actual traffic data. For analyzing novel extended dynamic wavelength and bandwidth algorithms used for various cases of wavelength allocation in NG-PON2 networks, the effective dynamic bandwidth allocation algorithm analysis is realized in the enhancement of simulation program. Finally, an optimization of the decision criterion defining a minimum bandwidth utilization of the actual wavelength is executed for NG-PON2 networks based on the hybrid time and wavelength division multiplexing technique. optical fiber networks; telecommunication services traffic control; scheduling algorithms; wavelength channel allocation; numerical simulation +
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architectures. For highly efficient bandwidth utilization, extended wavelength allocation methods must be also considered in current and near future hybrid Time- and Wavelength Division Multiplexing-based Passive Optical Network (TWDM-PON) [9; 10; 11; 12; 13]. Among other things, Next-Generation Passive Optical Networks (NG-PON) [14; 15; 16; 17] provide cost-efficient traffic protection schemes [18; 19; 20; 21; 22], whereas fault management is important for uninterrupted internet access services [23; 24; 25]. Therefore, NG-PON networks must support the end-to-end protection option for use cases if specified reliability requirements based on user profiles are expected. In the context of network traffic analysis, a discovery of appropriate tools for the evaluation of protection schemes considered as a part of the F5G architecture in future metropolitan and access optical networks is necessary [26; 27; 28]. The recent standard for NG-PON2 networks [29] describes only the single wavelength and bandwidth allocation and leaves the multiple wavelength allocation issue to the preferences of network operators. So, effective bandwidth and wavelength allocation algorithms considered for WDM-PON networks present current research challenges of high interest. Given the dynamic nature of data traffic in passive optical networks, it is important to answer the question of how the Medium Access Control (MAC) layer supporting these wavelength channels reacts. The MAC implementation in NG-PON2 networks must take into consideration the intricacies involved in the Optical Line Terminal (OLT) design for any perspective technology to be able to support the dynamic arrangement of Optical Network Unit (ONU) channels. In the passive optical network based on the WDM technique, data traffic from multiple ONU units is multiplexed on available wavelength channels. Considering common demands of wavelength channels, this PON type requests available MAC protocols for coordination of communication between the OLT terminal and ONU units to avoid collisions in data transmission between various ONU units. In [30], the open problem of MAC implementation in NG-PON2 networks with multiple-line rate channels is highlighted for the first time. A mechanism to provision bandwidth and guarantee a service framework in flexible wavelength spaced system is proposed.