Comparison between-ipv6-and-6 lowpan
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In Internet of things network stack don't support IPV6 packet of length 1280 Bytes. there for 6LowPAN being an adaptation layer create chunks of IPV6 packet and make it compatible with Network stack. and on communicating with outer world 6LowPAN transform it into full length IPV6 Packet.
![IPV6 Protocol
1. IPv6 allows for 128-bit IP address fields in the form of 8 16-bit integers separated by colons [1]
2. IPv6 header is 40 bytes, UDP header is 8 bytes. [1]
3. IPv6 requires that links support an MTU of 1280 bytes. [1]
4. Link-layer fragmentation / reassembly is Supported. [1]
5. Time To Live (TTL) is replaces by Hop Limit (HL) [1]
6. Protocol field is replaced by Next Header Type [1]
7. Header Checksum field removed (don’t spend time processing the checksum). [1]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Comparison between-ipv6-and-6 lowpan
- 1. By: Kaleem Ullah MSCS14059 Presented To: Dr. Adnan Noor
- 2. IPV6 Protocol 1. IPv6 allows for 128-bit IP address fields in the form of 8 16-bit integers separated by colons [1] 2. IPv6 header is 40 bytes, UDP header is 8 bytes. [1] 3. IPv6 requires that links support an MTU of 1280 bytes. [1] 4. Link-layer fragmentation / reassembly is Supported. [1] 5. Time To Live (TTL) is replaces by Hop Limit (HL) [1] 6. Protocol field is replaced by Next Header Type [1] 7. Header Checksum field removed (don’t spend time processing the checksum). [1]
- 3. 6LowPAN Overview: IEEE 802.15.4 is a standard which specifies the physical layer and media access control for low-rate wireless personal area networks (LR-WPANs). Basis for ZigBee, WirelessHART and 6LoWPAN. Characteristics: • 20-250 kbps (2.4 GHz ISM band) • Direct Sequence Spread Spectrum (DSSS) • CSMA-CA medium access control • Link encryption (AES) (no key management) • Full / reduced function devices
- 4. 6LowPAN 1. 6LowPAN protocol is an adaptation layer allowing to transport IPv6 packets over 802.15.4 links. 2. Uses 802.15.4 in un-slotted CSMA/CA mode (strongly suggests beacons for link-layer device discovery). 3. Based on IEEE standard 802.15.4-2003. 4. Mesh routing support (mesh under). 5. Low processing / storage costs. 6. Header Compression of IPv6 and UDP/ICMP headers. 7. 802.15.4 MAC header can be up to 25 byte with null security. 8. With Security: 25+21=46 byte (AES-CCM-128). 9. 802.15.4 frame size of 127 byte. 10.Application data(PayLoad) = [ 127-(40-25-8) ] = 54 (null security).
- 5. Conclusion (Major Difference): Conclusion: [2]6LowPAN uses an adaptation layer between the network (IPv6) and data link layer (IEEE802.15.4 MAC) to fragment and reassemble IPv6 packets. The routing in 6LoWPAN is primarily divided on the basis of routing decision taken on adaptation or network layer. 1. IPV6 Does not provide Routing but 6LowPAN Support Mesh Routing. 2. IPV6 Needs Link Speed of MTU 1280 bytes but 6LowPAN support 127 bytes. 3. IPV6 Support Segmentation and 6LowPAN does segmentation and Re-Assemble as IPV6 packets
- 6. References Reference: [1]. RFC 2460, IETF, 1998, Internet Protocol, Version 6 (IPv6) Specification [2]. Survey, Kumar, Tiwari, 2012, Routing in IPv6 over Low-Power Wireless Personal Area Networks (6LoWPAN): A Survey