End Point Properties for Peer Selection
draft-deng-alto-p2p-ext-02
The information below is for an old version of the document.
| Document | Type | Active Internet-Draft (individual) | |
|---|---|---|---|
| Authors | Deng Lingli , Haibin Song , Sebastian Kiesel | ||
| Last updated | 2014-06-27 | ||
| Stream | (None) | ||
| Formats | plain text htmlized pdfized bibtex | ||
| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | I-D Exists | |
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| Send notices to | (None) |
draft-deng-alto-p2p-ext-02
LMAP Working Group L. Deng
INTERNET-DRAFT China Mobile
Intended Status: Standard Track H. Song
Expires: January 28, 2015 Huawei
S. Kiesel
University of Stuttgart
June 27, 2014
End Point Properties for Peer Selection
draft-deng-alto-p2p-ext-02
Abstract
The initial purpose for ALTO protocol is to provide better than
random peer selection for p2p networks. The peer selection method
does not only depend on the peer location, but also on other
properties of a peering node. In this document, we define additional
endpoint properties.
Status of this Memo
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Copyright and License Notice
Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.
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This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 End Point Extensions . . . . . . . . . . . . . . . . . . . . . . 3
3.1. Endpoint Property Type: p2p_caching . . . . . . . . . . . 3
3.2. Endpoint Property Type: battery_limited . . . . . . . . . 3
3.3. Endpoint Property Type: access_preference . . . . . . . . 4
3.4. Endpoint Property Type: volume_limited . . . . . . . . . . 4
4 Security Considerations . . . . . . . . . . . . . . . . . . . . 4
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 5
7 References . . . . . . . . . . . . . . . . . . . . . . . . . . 6
7.1 Normative References . . . . . . . . . . . . . . . . . . . 6
7.2 Informative References . . . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 7
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1 Introduction
The initial purpose for ALTO protocol is to provide better than
random peer selection for p2p networks. The peer selection method
does not only depend on the peer location, but also on other
properties of a peering node. In this document, we define extended
endpoint property extensions that will impact peer selection.
2 Terminology
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].
This document makes use of the ALTO terminology defined in RFC 5693
[RFC5693].
3 End Point Extensions
This document defines new endpoint property types for the ALTO
protocol [RFC 7285].
3.1. Endpoint Property Type: p2p_caching
As described in [I-D.draft-deng-alto-p2pcache], P2P caching node can
also act as p2p peers in a p2p network. If a p2p caching peer is
located near the edge of the network, it will reduce the backbone
traffic, as well as the uploading traffic. [RFC7069] provides one
example of such caching nodes. P2P caching peers are usually
expected to be given higher priority than the ordinary peers for
serving a content request so as to optimize the network traffic. So
it's necessary for the endpoint property to support this indication.
The value for this property (defined as a boolean) is either "true"
or "false". If the peer in question is actually a caching node, the
value of this property wrt the peer is set to "true".
3.2. Endpoint Property Type: battery_limited
Another important endpoint property that will impact peer selection
is what kind of power supply the peer has. It can be either the
electric power or the battery supply. And for most of the time, it
is safe to bet that electric power supplied nodes would stay online
longer than those battery supplied nodes. And most of the nowadays
intelligent equipments are aware of their power supply type. But it
is necessary that whether or not the power supply of a peer is
limited by its battery can be queried through some method.
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The value for this property (defined as a boolean) is either "true"
or "false". If the peer in question is actually battery-limited, the
value of this property wrt the peer is set to "true".
3.3. Endpoint Property Type: access_preference
The third important endpoint property that will impact peer selection
is the node access type. If it is a node owned by a home subscriber,
the access type can be DSL (Digital Subscriber Line), FTTB (Fiber To
The Building), or FTTH (Fiber To The Home). If it is deployed in a
data center, one may prefer to specify a special access type for it,
because it is likely to be more robust, and have more network
resources than home users. A p2p application may have its own
algorithm for peer selection if the node access type information can
be provided.
The value for this property (defined as integer) can be set by the
ISP of the ALTO server, based on its own relative preference to
different network access types. A peer with the higher value is more
preferable than another peer with the lower value.
For example, an ISP could use the following setting for now:
1 = DSL; 10 = FTTB; 12 = FTTH; 50 = DC;
and add "100=new_technology", when some new technology better than
FTTH appears later.
3.4. Endpoint Property Type: volume_limited
Many wireless operators offer low-cost plans, which limit the amount
of data to be transmitted within a month to some gigabytes. After
that they will throttle the subscriber's bandwidth or charge extra
money. Hosts with such a tariff, could be tagged by another endpoint
property "volume_limited" and should be avoided for peer selection.
The value for this property (defined as a boolean) is either "true"
or "false". If a peer is constrained by such a subscription plan, the
value of this property wrt the peer is set to "true".
4 Security Considerations
The indication of new endpoint properties to the ALTO clients may set
targets for the malicious nodes to hack.
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5. IANA Considerations
This document adds the following new endpoint property types to the
existing registry created by ALTO protocol [RFC7285].
+-----------------+---------------------------------------+
|Identifier |Intended Semantics |
+-----------------+---------------------------------------+
|p2p_caching |Whether the peer is a network cache, |
|(boolean) |value is "true" or "false". |
+-----------------+---------------------------------------+
|battery_limited |Whether the peer is battery-limited, |
|(boolean) |value is "true" or "false". |
+-----------------+---------------------------------------+
|link_preference |The relative preference from the ISP's |
|(integer) |point of view based on the type of |
| |network access of the peer, value is |
| |a integer. |
+-----------------+---------------------------------------+
|volume_limited |Whether the peer's plan is constrained,|
|(boolean) |value is "true" or "false". |
+-----------------+---------------------------------------+
6. Acknowledgements
The authors would like to thank Michael Scarf and Sabine Randriamsy
for their review and valuable comments.
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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.
[RFC7285] Alimi, R., Penno, R., and Y. Yang, "ALTO Protocol",
RFC7285, March 2014.
7.2 Informative References
[I-D.draft-deng-alto-p2pcache] Deng, L., Chen, W., and Q. Yi,
"Considerations for ALTO with network-deployed P2P
caches", draft-deng-alto-p2pcache-03 (work in progress),
February 2014.
[RFC7069] Alimi, R., Rahman, A., Kutscher, D., Yang, Y., Song, H.,
and K. Pentikousis, "DECoupled Application Data Enroute
(DECADE)", RFC 7069, November 2013.
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Authors' Addresses
Lingli Deng
China Mobile
China
Email: denglingli@chinamobile.com
Haibin Song
Huawei
China
Email: haibin.song@huawei.com
Sebastian Kiesel
University of Stuttgart, Computing Center
Germany
Email: ietf-alto@skiesel.de
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