ALTO L. Deng Internet-Draft China Mobile Intended status: Informational H. Song Expires: August 17, 2014 Huawei February 13, 2014 End Point Properties for Peer Selection draft-deng-alto-p2p-ext-00.txt 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 the possible ALTO endpoint property extensions that will impact peer selection. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. 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Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of Deng & Song Expires August 17, 2014 [Page 1] Internet-Draft End Point Properties for Peer Selection February 2014 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 2 3. End Point Extensions . . . . . . . . . . . . . . . . . . . . 2 3.1. Endpoint Property Type: p2p_caching . . . . . . . . . . . 3 3.2. Endpoint Property Type: battery_limited . . . . . . . . . 3 3.3. Endpoint Property Type: network_access . . . . . . . . . 3 4. Security Considerations . . . . . . . . . . . . . . . . . . . 3 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.1. Normative References . . . . . . . . . . . . . . . . . . 4 6.2. Informative References . . . . . . . . . . . . . . . . . 4 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4 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 the possible ALTO endpoint property extensions that will impact peer selection. 2. Terminology ALTO: application layer traffic optimization. For ALTO protocol, please refer to [I-D.ietf-alto-protocol]. DSL: Digital subscriber line, is a family of technologies that provide Internet access by transmitting digital data over the wires of a local telephone network. FTTB: Fiber To The Building, refers to fiber reaches the boundary of the building. FTTH: Fiber To The Home, refers to figure reaches the the boundary of the living space. 3. End Point Extensions This document provides three endpoint property extensions for ALTO protocol. Deng & Song Expires August 17, 2014 [Page 2] Internet-Draft End Point Properties for Peer Selection February 2014 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. For example, [RFC7069] provides one example of such caching nodes. P2P caching peers usually have 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 is either "true" or "false", in ASCII. 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 most of the time, it is obvious that electric power supplied nodes are more likely 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. The value for this property is either "true" or "false", in ASCII. 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: network_access The third important endpoint property that will impact peer selection is the node access type. If it is a node owned by home user, the access type can be DSL, or FTTB, or FTTH. If it is deployed in a data center, we can specify a special access type for it, because it is more robust, and is more likely to have more network resources than home users. A p2p application may have its own algorithm for peer selection if this information can be provided. The value for this property can be enumerated as "adsl", "ftth", "fttb", "dc", and etc. 4. Security Considerations The indication of new endpoint properties to the ALTO clients may set targets for the malicious nodes to hack. Deng & Song Expires August 17, 2014 [Page 3] Internet-Draft End Point Properties for Peer Selection February 2014 5. IANA Considerations This document adds the following new endpoint property type to the existing registry created by ALTO protocol [I-D.ietf-alto-protocol]. +---------------+---------------------------------------+ |Identifier |Intended Semantics | +---------------+---------------------------------------+ |p2p_caching |Whether the peer is a network cache, | | |value is "true" or "false", in ASCII. | +---------------+---------------------------------------+ |power_supply |Whether the peer is battery-limited, | | |value is "true" or "false", in ASCII. | +---------------+---------------------------------------+ |network_access |The type of access network of the peer,| | |value is enumerated as "adsl", "ftth", | | |"fttb", "dc", in ASCII. | +---------------+---------------------------------------+ 6. References 6.1. Normative References [I-D.ietf-alto-protocol] Alimi, R., Penno, R., and Y. Yang, "ALTO Protocol", draft- ietf-alto-protocol-25 (work in progress), January 2014. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. 6.2. 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. Authors' Addresses Deng & Song Expires August 17, 2014 [Page 4] Internet-Draft End Point Properties for Peer Selection February 2014 Lingli Deng China Mobile Email: denglingli@chinamobile.com Haibin Song Huawei Email: haibin.song@huawei.com Deng & Song Expires August 17, 2014 [Page 5]