Internet DRAFT - draft-icn-implementation-sdn
draft-icn-implementation-sdn
Network Working Group W. Liu
Internet-Draft Huawei Technologies
Intended status: Informational J. Ren
Expires: February 10, 2014 J. Wang
City University of Hong Kong
August 09, 2013
A Unified Framework for Software-Defined Information-Centric Network
draft-icn-implementation-sdn-00
Abstract
This document aims at discussing some research issues about the
implementation of information-centric network (ICN) architectures.
Towards this end, we first review the implementation methods employed
by various ICNs and discuss the potential problems of these
implementations. Then we propose a unified framework for ICN
implementation based on Software-Defined Networking (SDN) technique
which can facilitate the implementation of any ICN architecture and
interoperability among different ICN architectures.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. ICN implementation . . . . . . . . . . . . . . . . . . . . . 3
2.1. ICN over IP . . . . . . . . . . . . . . . . . . . . . . . 3
2.2. ICN over L2 . . . . . . . . . . . . . . . . . . . . . . . 3
2.3. ICN over virtualized network . . . . . . . . . . . . . . 4
3. Software-Defined Networking . . . . . . . . . . . . . . . . . 4
4. A unified framework for software-defined information-centric
network . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
6. Security Considerations . . . . . . . . . . . . . . . . . . . 6
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 6
7.1. Normative References . . . . . . . . . . . . . . . . . . 6
7.2. Informative References . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 7
1. Introduction
To provide more efficient information dissemination, many studies are
driven to redesign the current Internet architecture. Information-
centric network (ICN) is one of these works. In ICN, the information
name is unique and independent of locations, applications, storages
and distribution approaches, which allows ubiquitous information
retrieval.
Based on this basic concept, many ICN architectures have been
proposed, for example, NDN [NDN], NetInf [NetInf], and the publish-
subscribe Internet (PSI) architecture [PSI]. To retrieve named
information, various advanced transmission techniques are introduced,
including name-based routing, name-based resolution, multicast and
etc. To fully support these techniques, dramatic changes to the
network devices deployed in current Internet are needed, which may
lead to challenge of ICNs implementation.
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Typically, the ICN deployment schemes can be classified into three
categories: 1). ICN over IP, which encapsulate ICN protocol data in
IP (or UDP/TCP) packets or take ICN protocol information using IP
options; 2) ICN over L2, which completely replace IP layer and
directly use data link protocol (such as PPP, Ethernet, IEEE 802.x)
to deliver data between neighbors; 3) ICN over virtualized network,
which exploit network virtualization technologies, such as software-
defined networking (SDN), to implement ICNs.
Although these schemes have both advantages and disadvantages, most
works on ICN implementation focus on how to implement a particular
ICN architecture. However, different ICN architecture employ
different transmission techniques and packet format, which is not
easy for the co-existence and inter-operability of different ICNs.
Thus, a unified framework for ICN implementation is needed to fast
deploy different ICNs, which may further support the inter-
operability among different ICNs.
This document first surveys several implementation methods and aims
to analyze the advantages and disadvantages of these methods. Then,
we propose a unified framework for ICN implementation based on
Software-Defined Networking techniques, which can support fast
implementation of various ICNs .
2. ICN implementation
This section presents several implementation schemes. For each
scheme, existing papers are survey to analyze the advantages and
disadvantages.
2.1. ICN over IP
The most popular way is implementing ICNs as the overlay, in the same
way that Internet implement over the telecommunication network. For
example, the NDN prototype, CCNx, is implemented in an overlay on
existing IP networks. The advantage is that only a few nodes need to
be updated for supporting new ICN-related operations, which enables
fast deployment. The disadvantage of this scheme is the performance
of ICNs is limited as the performance can be affected by the
performance of the underlayer network.
2.2. ICN over L2
ICN over L2 means using ICN to replace IP layer. The prototype of
PURSUIT, blackadder, is implemented based on CLINK router and can be
run over Ethernet. It also design a new forwarding technique to
achieve efficient multicast with line speed. CRoWN introduces ICN
concept in Vehicular Ad hoc Networks [CRoWN]. It is implemented on
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top of the IEEE 802.11p standard layers. The advantage is that ICN
can fully exploit the resource of underlayer networks can achieve
better performance. The disadvantage is that it is difficult to
widely deployment.
2.3. ICN over virtualized network
ICN over virtualized network is to exploit some virtualization
techniques for implementation. One of the potential techniques is
SDN. The main characteristic of SDN is the decoupling of control
plane and data plane, which makes the data plane much more simple and
elegant compared to the traditional networks. CONET, one of ICNs, is
implemented over OpenFlow (the most popular SDN instantiation)
[CONET]. The OpenFlow is extended to support ICN-related operations.
The advantage is that the decoupling enables the fast deployment of
ICNs with fully supporting ICNs features. However, existing works
focus on how to implement a particular ICN architecture.
3. Software-Defined Networking
Software-Defined Networking (SDN) is an emerging paradigm which
decouples the control plane that makes decision, including packets
routing and procession, from the data plane that forwards packets to
the desired destination [SDN]. With this separation, SDN allows
network administrators to specify more complex network services
(e.g., security, resource control, and prioritization) more easily
through the programmable central control of network traffic without
reprograming the underlying hardware devices. It also makes network
configurations easier to configure, manage, troubleshoot, and debug.
SDN has attracted significant attention in both the academia and the
industry. Many researches have been proposed to exploit SDN to
implement traffic engineering, security and so on, which is more
complex in traditional Internet. Many industry group, including Open
Networking Foundation (ONF) and IRTF Software-Defined Networking
Research Group (SDNRG), has been set up to lead the advancement of
SDN and standardizing critical elements of the SDN architecture.
There are some SDN pilots in industry. For example, Google has
implemented its inter-data center based on SDN.
4. A unified framework for software-defined information-centric network
This section describes the unified framework proposed in this paper
for enabling ICN implementation. This framework was designed as a
flexible solution and capable of modularizing ICN architecture. The
most important functions of ICNs are abstracted from various works
and modularized in the framework.
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Figure 1 is the overview of our framework. The function modules are
extracted from various ICN proposals.
Please view in a fixed-width font such as Courier.
Please view in a fixed-width font such as Courier.
+----------------------+ +----------------------+
| | | |
| ICN protocol A | | ICN protocol B |
| +------------------+ | | +------------------+ |
| | cache management | | | | optimization | |
| +------------------+ | | +------------------+ |
| | routing | | | | routing | |
| +------------------+ | | +------------------+ |
| |content management| | | |content management| |
Control | +------------------+ | | +------------------+ |
Program +----------------------+ +----------------------+
------------------------------------------------------------------------
+---------------+ +----------------------+
| Protocol | |Network Virtualization|
| | +----------------------+
| Recognization | | Topology Management |
Controller +---------------+ +----------------------+
------------------------------------------------------------------------
+------------------+
Switch | +--------------+ |
+------------------+ | | Label Mapping| |
| +--------------+ | | +--------------+ |
| | Cache | | | | Cache | |
| +--------------+ | | +--------------+ |
| | Forwarding | | | | Forwarding | |
| +--------------+ | | +--------------+ |
| Switch | | Access Switch |
+------------------+ +------------------+
the overview of the unified framework
Based on Software-Defined Networking, the proposed framework contains
three components: switch, controller and control programs. Switches
forward packets according to its flow entries and cache packet
following its cache policy. A special switch, called access switch,
can encapsulate the original ICN packet according to mapping rules
configured by the controller. (to do. The interface between switches
and the controller). The controller can collect the topology
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information from switches to form a global map of the network and
then slice the network resource for different control program. The
controller will receive the packet which cannot be routed by the
switches. It can recognize the packet protocol and send the packet
to the corresponding control program. (to do). Each control program
implements a particular ICN protocol. It will receive the packet
from the controller and execute protocol-related operations. (to do).
5. IANA Considerations
This document makes no request of IANA.
6. Security Considerations
Security issues are not discussed in this memo.
7. References
7.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
7.2. Informative References
[CONET] L. Veltri, et al., ., "Supporting Information-Centric
Functionality in software defined networks", 2012.
[CRoWN] M. Amadeo, et al., ., "CRoWN: Content-Centric Networking
in Vehicular Ad Hoc Networks", 2012.
[DON] T. Koponen, et al., ., "A data-oriented (and beyond)
network architecture", 2007.
[ICN] B. Ahlgren, et al., ., "A survey of information-centric
networking", 2012.
[NBN] V. Jacobson, et al., ., "Networking named content", 2009.
[NDN] V, Jacobson, et al., ., "Networking named content", 2009.
[NetInf] C. Dannewitz, ., "NetInf: An Information-Centric Design
for the Future Internet", 2011.
[PSI] P. Jokela, et al., ., "LIPSIN: line speed publish/
subscribe inter-networking", 2011.
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[SDN] N. McKeown, et al., ., "OpenFlow: enabling innovation in
campus networks", 2008.
Authors' Addresses
Will(Shucheng) Liu
Huawei Technologies
Bantian, Longgang District
Shenzhen 518129
P.R. China
Email: liushucheng@huawei.com
Jing Ren
City University of Hong Kong
Tat Chee Avenue
Hong Kong
P.R. China
Email: jingren@cityu.edu.hk
JianPing Wang
City University of Hong Kong
Tat Chee Avenue
Hong Kong
P.R. China
Email: jianwang@cityu.edu.hk
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