Internet DRAFT - draft-wang-cats-green-challenges
draft-wang-cats-green-challenges
cats J. Wang
Internet-Draft Y. Fu
Intended status: Informational China Mobile
Expires: 8 October 2023 6 April 2023
Green Challenges in Cats
draft-wang-cats-green-challenges-00
Abstract
As mobile edge computing networks sink computing tasks from cloud
data centers to the edge of the network, tasks need to be processed
by computing resources close to the user side. Therefore, CATS was
raised. Reducing carbon footprint is a major challenge of our time.
Networks are the main enablers of carbon reductions. The
introduction of computing dimension in CATS makes it insufficient to
consider the energy saving of network dimension in the past, so the
green for CATS based on network and computing combination is worth
exploring. This document outlines a series of challenges and
associated research to explore ways to reduce carbon footprint and
reduce network energy based on CATS.
Status of This Memo
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This Internet-Draft will expire on 8 October 2023.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Definition of Terms . . . . . . . . . . . . . . . . . . . . . 3
3. Challenges . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.1. Computing Resource Energy Consumption Modeling . . . . . 3
3.2. Joint Optimization of Computing and Network . . . . . . . 3
4. Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . 4
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
7. Informative References . . . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4
1. Introduction
With the continuous development and progress of the Internet, a large
amount of computing resources is required to complete data
processing. In order to disperse the pressure of cloud data centers,
computing power gradually moves from the center to the edge, forming
scattered computing resources in mobile networks. In order to make
full use of scattered computing resources and provide better
services, Computing-Aware Traffic Steering (CATS) is proposed to
support steering the traffic among different edge sites according to
both the real-time network and computing resource status as mentioned
in [I-D.yao-cats-ps-usecases] and [I-D.yao-cats-gap-reqs]. It
requires the network to be aware of computing resource information
and select a service instance based on the joint metric of computing
and networking.
Green has become a global topic. The United Nations and the vast
majority of governments agree that climate change and the need to
curb greenhouse gas emissions are the major challenges of our time.
Therefore, improving energy efficiency and reducing electricity
consumption are becoming increasingly important for society and many
industries. The networking industry is no exception. The IETF
conducted a study on the energy costs of the IETF meeting three times
a year. The results showed that it was found that 99% of energy
consumption came from air travel.
In addition, there are several papers that discuss green networks,
and some literature [I-D.cx-green-ps] summarizes the energy-saving
possibilities that exist in the network. However, there is no
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discussion of joint optimization of green and energy savings with
computing and networking. Therefore, this document outlines a series
of challenges and related research to explore ways to reduce carbon
emissions and reduce network energy based on CATS.
2. Definition of Terms
Computing-Aware Traffic Steering (CATS): Aiming at computing and
network resource optimization by steering traffic to appropriate
computing resources considering not only routing metric but also
computing resource metric.
Service: A monolithic functionality that is provided by an endpoint
according to the specification for said service. A composite
service can be built by orchestrating monolithic services.
Service instance: Running environment (e.g., a node) that makes the
functionality of a service available. One service can have several
instances running at different network locations.
3. Challenges
Considering energy savings in CATS creates challenges in the
following aspects
3.1. Computing Resource Energy Consumption Modeling
Because Cats considers computing resources, modeling of computing
resource energy consumption is necessary in order to save energy.
Some documents introduce three levels of metric modeling
considerations. The energy consumption of the equipment is different
when the load is different. For example, the energy efficiency of
equipment is different when it is not loaded or at full load.
Therefore, it is also a challenge to consider which factors to
consider when modeling the energy consumption of computing resources.
3.2. Joint Optimization of Computing and Network
On the one hand, the magnitude of computing energy consumption may be
different from the magnitude of network energy consumption, and how
to weigh the ratio of the two becomes a challenge when performing
joint optimization.
On the other hand, the introduction of energy consumption may be
accompanied by a compromise between user service experience, and how
to save energy while ensuring user service experience is also a
challenge when carrying out joint optimization.
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4. Conclusion
How to make networks "greener" (or reduce carbon footprint) is an
important challenge for the networking industry today. This document
highlights the technical challenges, such as how to model the energy
consumption of computing resources and the problems caused by the
joint optimization of computing and networking.
5. Security Considerations
TBD.
6. IANA Considerations
TBD.
7. Informative References
[I-D.yao-cats-ps-usecases]
Yao, K., Eardley, P., Trossen, D., Boucadair, M.,
Contreras, L. M., Li, C., Li, Y., and P. Liu, "Computing-
Aware Traffic Steering (CATS) Problem Statement and Use
Cases", Work in Progress, Internet-Draft, draft-yao-cats-
ps-usecases-00, 3 March 2023,
<https://datatracker.ietf.org/doc/html/draft-yao-cats-ps-
usecases-00>.
[I-D.yao-cats-gap-reqs]
Yao, K., Jiang, T., Eardley, P., Trossen, D., Li, C., and
D. Huang, "Computing-Aware Traffic Steering (CATS) Gap
Analysis and Requirements", Work in Progress, Internet-
Draft, draft-yao-cats-gap-reqs-00, 3 March 2023,
<https://datatracker.ietf.org/doc/html/draft-yao-cats-gap-
reqs-00>.
[I-D.cx-green-ps]
Clemm, A., Westphal, C., Tantsura, J., Ciavaglia, L., and
M. Odini, "Challenges and Opportunities in Management for
Green Networking", Work in Progress, Internet-Draft,
draft-cx-green-ps-02, 13 March 2023,
<https://datatracker.ietf.org/doc/html/draft-cx-green-ps-
02>.
Authors' Addresses
Jing Wang
China Mobile
No.32 XuanWuMen West Street
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Beijing
100053
China
Email: wangjingjc@chinamobile.com
Yuexia Fu
China Mobile
No.32 XuanWuMen West Street
Beijing
100053
China
Email: fuyuexia@chinamobile.com
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