Phone email Hitoshi MORIOKA Allied Telesis RampD Center 21438 Tenjin Chuo ku Fukuoka 8100001 JAPAN 81927717630 hmoriokaroothqcom Hiroki Nakano Trans New Technology Inc ID: 775113
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NameAffiliationsAddressPhoneemailHitoshi MORIOKAAllied Telesis R&D Center2-14-38 Tenjin, Chuo-ku, Fukuoka 810-0001 JAPAN+81-92-771-7630hmorioka@root-hq.comHiroki NakanoTrans New Technology, Inc.Sumitomo Seimei Kyoto Bldg. 8F, 62 Tukiboko-cho, Shimogyo, Kyoto 600-8492 JAPAN+81-75-213-1200cas@trans-nt.comGeorge CherianQualcomm+1-858-651-6645gcherian@qti.qualcomm.com
March 2013
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IP Address assignment: Offline discussion summary
Date: 2013-03-18
Authors:
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Summary: Include both options
REASON: Proposals address different use-cases
Use of DHCP using HLP
Benefits:
IP address continuity
More general
Cost:
Additional rounds of signaling before data transmission can begin [2 additional roundtrips: (
i
) for Duplicate Address detection for IPv6; (ii) for DNS MAC address discovery
for local DNS]
Additional latency for IPv6: Duplicate Address detection requires that the all the existing/associated devices need to be given time to respond to the query sent out by the new incoming device. Deployment of “Optimistic DAD (RFC4429
)”
can reduce this latency
Association response may be delayed if DHCP server does not respond in time
FILS IP Address assignment
Benefits:
No additional signaling: helps in crowded situations, transit stations to reduce signaling storms
IP address locally
assigned (by AP):
Does not introduce additional latency to send Association Response message
Cost
Minimized feature set (only limited options of DHCP are supported)
IP address continuity outside of an ESS not supported
Slide3Which one to use?
Which mechanism to use?Based on application requirementHow to select the IP address assignment method?Beacon/Probe Response advertises which options are supported by the APSTA selects the appropriate option based on the AP support and the application requirement
March 2013
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