International telecommunication union
Download 0.91 Mb.
|
- Navigate this page:
- 6.7 Energy management aspects of network softwarization
6.6.6 Coordinated APIsIn 5G mobile networks, it may be useful to define API so that applications and services can program network functions directly bypassing control and management to optimize the performance, e.g., to achieve ultra-low latency applications. Discussions on the capabilities of the programmable interface should be objective-based, for example, accommodating a variety of application services easily, enabling the higher velocity of service deployment and operation, and the efficient physical resource utilization. The users or developers who utilize the APIs could be categorized according to their roles. Application service providers enable value added services over the end-to-end virtual connectivity through the APIs. Advanced network service providers add some sophisticated functions to communications sessions, such as security and reliability, in order to facilitate faster application service deployment by the aforementioned application service providers. Network management operators also utilize the APIs for more efficient and agile resource handling. Information modelling should be the most significant issues for the APIs development. It should include virtual resource characteristics, relationship between various resources, operational models, and so on. Levels of abstraction should be carefully investigated, so that the model and APIs should be human-readable and machine/system-implementable at higher performance simultaneously. Since the considerations on software development methodologies would have the impact on the model development, the choice of the proper methodology for each capability will be important. The system control and coordination architecture is another issue for the achievement of scalable and agile APIs. Not only the traditional provisioning/configuration or distributed control of networking systems, automatic and autonomic system control should be the main target of these activities. The closed loop control architecture might be the most innovative enhancement from the traditional networking systems even for the APIs. The robustness and fault tolerance are absolutely necessary for the open systems controlled through the APIs by various providers. Isolation over the virtual resources should be carefully structured with APIs’ functionalities and constraints. In summary, discussions on the programmable interface capabilities should embrace;
Gap analysis In 5G mobile networks, it may be useful to define API so that applications and services can program network functions directly bypassing control and management to optimize the performance, e.g., to achieve ultra-low latency applications. Information modelling should be the most significant issues for the APIs development. It should include virtual resource characteristics, relationship between various resources, operational models, and so on. Discussions on the programmable interface capabilities should include:
These issues should be considered as a gap to be discussed for possible standardization items. There is also a gap for requiring a completely new API to deal with new usage of softwarized network infrastructure such as capability exposure (refer to Clause 15). 6.7 Energy management aspects of network softwarizationEnergy saving, optimization and management in the 5G networking and servicing ecosystem is an important issue in the design of the 5G infrastructure. As performance of 5G network equipment improves due to denser implementation a higher energy consumption would need to be avoided. 5G Network softwarization offers the means of flexibly and efficiently changing the configuration of the software components and network slices in a 5G systems for managing and optimizing the overall energy consumption in a multi-domain operation. Such energy management capabilities would help also in the use scenarios in other sectors which are using 5G systems. Network softwarization must become a useful tool for reducing the environmental impact of other sectors and the means of controlling and managing energy consumption in the 5G infrastructure. Network softwarization would enable monitor, and measure energy consumption and enable seamless, autonomic composition / decomposition of network slices, dynamic placements of network functions and migration of groups VMs 18between servers of the same domain or across a group of energy-conscious domains aiming to i) optimize the overall energy consumption by dynamically changing the percentage of active versus stand-by servers/network functions and the load per active server in a domain, and ii) stabilize the 5G system energy distribution, under peak load and increased demand, by dynamically changing the energy consumption/production requirements of the local domains. Autonomic composition / decomposition of network slices, dynamic placements of network functions and moving VMs between servers in geographically distributed group domains is not trivial, as very strict Service Level Agreements (SLAs) should be guaranteed. Moreover, changing software components and/or containers for functions requires a significant telecommunication and energy cost, which should be precisely calculated.
Energy-conscious 5G domain: optimizing the energy consumption within the limits of a single domain, based on system virtualization and the optimal distribution of VMs as well as M2M scenario. This will be coupled with the dynamic adaptation of active and stand-by servers/network functions and the load optimization per active server. A new monitoring framework to measure the energy consumption per server module/networking component and activate low-power states on devices would be needed. Group of energy-conscious 5G domains: optimizing the cumulative energy consumption in a group of domains, based on optimal distribution of VMs across all of the servers that belong in the group of domains using policy-based methods. Measuring the energy consumption on the domain level and deploy policies and solutions that will achieve decreased cumulative power consumption across the whole group of domains would be needed.
Directory: ITU-T -> focusgroups focusgroups -> International Telecommunication Union focusgroups -> Innovation of ict in Developing Countries focusgroups -> International Telecommunication Union focusgroups -> Telecommunication focusgroups -> Focus Group on Smart Grid focusgroups -> Telecommunication focusgroups -> Telecommunication focusgroups -> Telecommunication focusgroups -> Innovation of ict in Developing Countries focusgroups -> Innovation of ict in Developing Countries Download 0.91 Mb. Share with your friends:
|