Working Group Z. Cao
Internet-Draft D. Liu
Intended status: Informational H. Deng
Expires: September 9, 2010 China Mobile
March 8, 2010
Light-weight IP Stack for Lossy and Low-power Networks
draft-cao-lightweight-ip-01
Abstract
This document describes the requirements for a new lightweight IP
stack for the Low-power and Lossy Networks, such as wireless sensor
networks, 802.15.4 enabled networks, and Machine-to-Machine type
communication (M2M).
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Characteristics of LLN . . . . . . . . . . . . . . . . . . . . 4
2.1. Latency . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2. Low Power . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3. Data Rates . . . . . . . . . . . . . . . . . . . . . . . . 4
2.4. Small Packets . . . . . . . . . . . . . . . . . . . . . . . 4
2.5. Asymmetry Link . . . . . . . . . . . . . . . . . . . . . . 4
2.6. Packet Loss . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Requirements for Lightweight IP Stack . . . . . . . . . . . . . 5
3.1. ICMP for network maintenance and debug . . . . . . . . . . 5
3.2. Specific API for enhanced performance . . . . . . . . . . . 5
3.3. Simplified Neighbor Discovery Protocol . . . . . . . . . . 5
3.4. Simplified IPsec/IKE support . . . . . . . . . . . . . . . 5
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 6
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 7
6. Normative References . . . . . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 9
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1. Introduction
This document describes the requirements for a new lightweight IP
stack for the Low-power and Lossy Networks, such as wireless sensor
networks, 802.15.4 enabled networks, and Machine-to-Machine type
communication (M2M).
Multiple implementations of IP stack exist for the Internet of
Things. There is a need of standardizing these efforts to increase
interoperations among them.
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2. Characteristics of LLN
2.1. Latency
The latency of M2M link is high mostly due to the low data rate.
2.2. Low Power
Typically, some or all devices are battery operated.
2.3. Data Rates
The data rate for 802.15.4-2006 is 20-250 Kbps. The data rate
required for 802.15.4g is 40-1000 Kbps.
2.4. Small Packets
Applications within LoWPANs are expected to originate small packets.
Adding all layers for IP connectivity should still allow transmission
in one frame without incurring excessive fragmentation and
reassembly. Furthermore, protocols must be designed or chosen so
that the individual "control/protocol packets" fit within a single
802.15.4 frame. Along these lines, IPv6's requirement of sub-IP
reassembly may pose challenges for low-end LoWPAN devices that do not
have enough RAM or storage for a 1280-octet packet.
2.5. Asymmetry Link
Due to the power constrain, some node may only be able to receive
packets but not able to send packets. This results into asymmetry
links in the network.
2.6. Packet Loss
Packet loss is high due to the unstable of LLN.
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3. Requirements for Lightweight IP Stack
3.1. ICMP for network maintenance and debug
TBD.
3.2. Specific API for enhanced performance
TBD.
3.3. Simplified Neighbor Discovery Protocol
This is introduced in [I.D-6LOWPAN-ND]
3.4. Simplified IPsec/IKE support
TBD.
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4. Security Considerations
TBD.
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5. IANA Considerations
This document does not require any IANA actions.
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6. Normative References
[I.D-6LOWPAN-ND]
Shelby, Z., "6LoWPAN Neighbor Discovery",
draft-ietf-6lowpan-nd-06.txt (work in progress),
September 2009.
[RFC4919] Kushalnagar, N., Montenegro, G., and C. Schumacher, "IPv6
over Low-Power Wireless Personal Area Networks (6LoWPANs):
Overview, Assumptions, Problem Statement, and Goals",
RFC 4919, August 2007.
[RFC4944] Montenegro, G., Kushalnagar, N., Hui, J., and D. Culler,
"Transmission of IPv6 Packets over IEEE 802.15.4
Networks", RFC 4944, September 2007.
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Authors' Addresses
Zhen Cao
China Mobile
Unit2, 28 Xuanwumenxi Ave,Xuanwu District
Beijing 100053
China
Email: zehn.cao@gmail.com
Dapeng Liu
China Mobile
Unit2, 28 Xuanwumenxi Ave,Xuanwu District
Beijing 100053
China
Email: liudapeng@chinamobile.com
Hui Deng
China Mobile
Unit2, 28 Xuanwumenxi Ave,Xuanwu District
Beijing 100053
China
Email: denghui@chinamobile.com
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