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M-QoS Comments. Authors:. Date: 2010-05-17. Abstract. The presentation asks 802.11s group opinion to resolve M-QoS comments. EDCA parameters use in MBSS. In current 802.11s draft, only the standard EDCA parameter values are allowed
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M-QoS Comments Authors: Date: 2010-05-17 Jarkko Kneckt, Nokia
Abstract The presentation asks 802.11s group opinion to resolve M-QoS comments. Jarkko Kneckt, Nokia
EDCA parameters use in MBSS • In current 802.11s draft, only the standard EDCA parameter values are allowed • Many CIDs, like 3020, 3189, 3191 suggest to be able to use also other than default parameter values • There are arguments for and against using the non-default EDCA parameters • Some arguments are introduced in the following slides Jarkko Kneckt, Nokia
802.11s EDCA Parameters History • The default EDCA parameters were selected, because the coordination or control of the EDCA parameters range was considered difficult. • The coordination of EDCA parameters is close to congestion control problems and so far the congestion control is considered to be vendor specific solution Jarkko Kneckt, Nokia
EDCA Parameters Trade-off • A mesh STA may influence on the probability to obtain the TXOP when it adjusts EDCA parameters. • If the parameters are wisely set, the extra throughput may be provided to correct devices and congestions may be avoided • If the parameters are set selfishly, the extra throughput may increase network congestions, create priority inversion and inequality among the mesh STAs Jarkko Kneckt, Nokia
Reasons to Enable use of Non-default EDCA Parameters • The Infrastructure BSS has possibility to control EDCA parameters • The mesh BSS should have the same capabilities, i.e. mesh BSS should not be restricted to default parameters • The congestion control schemes need to adjust EDCA parameters • Without EDCA parameters adjustment, the congestion control protocols will not operate Jarkko Kneckt, Nokia
One possible outcome for EDCA parameter handling • One could be that EDCA parameter values are not controlled/coordinated, i.e. devices may use any EDCA parameter values. If devices use other than default EDCA parameters, it would be polite to signal the EDCA parameter values among neighborhood in beacon and probe.response frames. Jarkko Kneckt, Nokia
Strawpoll 1 • May MBSS use only the default EDCA parameters? • Yes • No Jarkko Kneckt, Nokia
Strawpoll 2 • Should mesh STA be capable to indicate the EDCA parameters it uses? • Yes • No Jarkko Kneckt, Nokia
References Jarkko Kneckt, Nokia