Computing in Network Research Group P. Liu
Internet-Draft L. Geng
Intended status: Informational China Mobile
Expires: May 6, 2020 November 3, 2019
Requirement of Computing in network
draft-liu-coinrg-requirement-01
Abstract
New technology such as IOT, edge computing,etc. propose the
requirement of computing in network, so convergence of network and
computing has become a trend. This document points out the
requirements of computing in network according to the development of
new Industry, including the performance, function and management
requirements.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
Status of This Memo
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This Internet-Draft will expire on May 6, 2020.
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Table of Contents
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements of Network . . . . . . . . . . . . . . . . . . . 2
2.1. Performance requirement . . . . . . . . . . . . . . . . . 3
2.1.1. Precision . . . . . . . . . . . . . . . . . . . . . . 3
2.1.2. Concurrent . . . . . . . . . . . . . . . . . . . . . 3
2.1.3. Security . . . . . . . . . . . . . . . . . . . . . . 4
2.2. Function requirement . . . . . . . . . . . . . . . . . . 4
2.2.1. Computing aware scheduling . . . . . . . . . . . . . 4
2.2.2. Function based addressing . . . . . . . . . . . . . . 4
2.2.3. Network programmability . . . . . . . . . . . . . . . 4
2.3. Management requirement . . . . . . . . . . . . . . . . . 5
2.3.1. Cross domain management . . . . . . . . . . . . . . . 5
2.3.2. Simple management . . . . . . . . . . . . . . . . . . 5
3. Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. Security Considerations . . . . . . . . . . . . . . . . . . . 5
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
6. Normative References . . . . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6
1. Overview
Intelligence in the whole industry has a huge demand for computing,
which put forwards immense challenges to cloud computing and network.
Network Architecture is undergoing a transformation towards cloud and
service, providing rapid response and flexible deployment for
different industries. The perfomance, function and management
requirements of network's development need to be considered.
2. Requirements of Network
Computing in the network has some requirements of performance,
function and management, to ensure the operation of future business
and user experience.
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2.1. Performance requirement
2.1.1. Precision
Precision of the network refers to the deterministic of latency,
packet loss rate and computing resource.
The traditional network's best-effort forwarding mode can no longer
meet the demand of such services for network latency. The
deterministic latency brings forward a new measure latitude for
network, which changes from in-time to on-time.
Packet loss rate is another factor to evaluate the precision of the
network. Utilizing the ubiquitous computing capability of the
network, network prediction and segment-by-segment path
retransmitting are realized based on AI, network transmission can be
optimized and service QoS can be ensured.
Besides those, how to precisely distribute network computing power to
meet the requirements of business requests is also a challenge to the
network. It considers the network status and the performance status
of computing resources to dynamic match the computing power. So the
user experience, utilization rate of computing resources and the
network efficiency can be optimum.
Some technologies such as time-sensitive network TSN, deterministic
network DETNET, etc., have proposed corresponding technical means to
provide network bearers with deterministic latency(IEEE802.1Qbv,
IEEE802.1Qbu) and packet loss rate and guarantee the user's business
experience. However, it also needs to consider how to guarantee the
service's end-to-end latency, packet loss rate and resource
utilization rate.
2.1.2. Concurrent
In the network computing system, the number of computing nodes
increases, so there is a lot of parallel computing needs between
nodes, coupled with the trend of interconnection of everything in the
future, it will bring great challenges to the network connection.
Therefore, how to build and deploy these distributed computing nodes,
ensure the processing capacity of the network element, and the
storage and call capacity of the database are worth studying.
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2.1.3. Security
Computing In network has brought the trend of network convergence in
different regions. For example, 5g network of operators can go deep
into the vertical industry user site to provide users with higher
quality network services, which will bring the convergence of
operator's network and user site network. Besides, industrial
Internet brings the trend of integration of industrial OT network and
IT network to further improve the production efficiency of the
industry. It need to ensure the security of the network, including
the mutual trust and non aggression of information among regions,
which may require further protection and detection measures.
2.2. Function requirement
2.2.1. Computing aware scheduling
Computing in network needs a reasonable scheduling strategy, which
means computing aware scheduling. According to the business
requests, dynamicly computing power matching is carried out based on
network status and performance of computing resources to achieve
optimal user experience, optimal utilization of computing resources
and optimal network efficiency. In computing aware scheduling,
computing is seen as "link state" and the computing resource
information should be exposed.
2.2.2. Function based addressing
Traditional application-based addressing can not accurately grasp the
network performance in real time. The comprehensive performance of
addressing results based on application layer may not be the best,
resulting in poor business experience. In the function based
addressing, the application deconstruction components on the server
side are distributed on the cloud platform, and the business logic in
the server is transferred to the client side. So the client only
needs to care about the computing function itself, not about the
computing resources such as server, virtual machine, container and so
on, so as to realize the function as a service.
2.2.3. Network programmability
Network programmability requires the network to configure parameters
according to users' needs, such as the network requirements including
bandwidth, latency and jitter , and computing requirements, such as
CPU, storage and memory. Users can transfer requirements based on
network capabilities or states, like network resources and computing
resources. Thus it can effectively support future business
requirements requiring high quality of service.
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2.3. Management requirement
2.3.1. Cross domain management
Computing in the network should guarantee the end-to-end network
management to meet the needs of different network topology,
performance and function, which involves cross domain network
arrangement. In the process of network data transmission, different
services will be forwarded by different ways or different network
protocols. For example, in cross enterprise network construction,
business requests from branches to headquarters may go through the
VPN protocol of layer 2, and the routing protocol of layer 3. The
branches send business requests to the cloud, may go through the
conversion from passive optical network to wavelength division
multiplexing, etc. It is necessary to realize the seamless
connection of all levels of network transformation, ensure the end-
to-end identifiability of business data flow, and provide a dedicated
network for carrying and forwarding.
2.3.2. Simple management
Compared with the traditional network, computing in the network is a
new architecture and system. Scheduling and cooperation among
different network domains, different operators and different users
are very complex problems. However, an effective management system
is still needed to make the network capability and computing
capability to cooperate with each other, and distribute the computing
power reasonably.
3. Conclusion
In the new business requirements, the existing network technology can
not meet the needs of transmission, computing and efficiency. It
need to meet the new network system requirements from the
performance, function and management aspects, to ensure that the
connectivity is everywhere, computing is everywhere, and intelligent
support is everywhere.
4. Security Considerations
TBD.
5. IANA Considerations
TBD.
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6. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
Authors' Addresses
Peng Liu
China Mobile
Beijing 100053
China
Email: liupengyjy@chinamobile.com
Liang Geng
China Mobile
Beijing 100053
China
Email: gengliang@chinamobile.com
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