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PRAW Follow Up. Authors:. Date: 2013-3-18. Authors:. Authors:. Background. TGah accepted concept of PRAW [1]: AP allocates resource for group of scheduled active polling STAs and indicates the resource allocation once in a long while.

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praw follow up
PRAW Follow Up

Authors:

Date: 2013-3-18

slide2

Authors:

Young Hoon Kwon, Huawei

slide3

Authors:

Young Hoon Kwon, Huawei

background
Background

Young Hoon Kwon, Huawei

  • TGah accepted concept of PRAW [1]:
    • AP allocates resource for group of scheduled active polling STAs and indicates the resource allocation once in a long while.
      • Not indicated in every short beacon frame (E.g., once in every long beacon frame)
    • Once PRAW is setup, AP allocates the resource periodically to a group of scheduled active polling STAs.
    • Allocated resource for PRAW will not be changed until updated PRAW information is broadcasted.
    • Resource for scheduled active polling STAs can be allocated within the PRAW duration.
      • Whenever scheduled active polling STA has data packet to send, it wakes up at its designated slot within the PRAW and send the packet after basic CCA.
    • TIM STAs are not allowed to access the channel during this window.
    • Within PRAW, each STA follows EDCA based channel access scheme.
  • In this contribution, we’d like to define PRAW signaling method.
rps ie
RPS IE

Current RPS IE contents [2]:

Young Hoon Kwon, Huawei

praw signaling
PRAW Signaling
  • Propose to modify current RPS_IE to include PRAW Signaling.
    • For each RAW indication, add 1 bit for “PRAW indication”.
      • If PRAW indication = 0, it means this RAW indication is for a normal RAW definition.
    • If PRAW indication is set,
      • it includes PRAW specific information such as
        • Periodicity (TBD bits): Period of PRAW occurrence in the unit of short beacon interval
        • Start Offset (TBD bits): Offset value to a short beacon frame that the first window of the PRAW appears from a reference point. (How to set a reference point and unit is TBD)
      • Also, Option and Slot definition subfields can be removed if PRAW indication is set.
        • As PRAW broadcasting is for TIM STAs who are not allowed to attend during PRAW duration, detailed slot definition within PRAW is not informative.
      • RAW group, RAW start time, and RAW duration are included.
        • RAW group: Indicates Non-TIM user group that may be scheduled in the PRAW.
        • RAW start time: Indicates start time of PRAW with respect to the end of beacon transmission.
        • RAW duration: Indicates duration of PRAW.

Young Hoon Kwon, Huawei

praw signaling1
PRAW Signaling

Modified RPS_IE example:

Young Hoon Kwon, Huawei

conclusions
Conclusions

Proposed to modify RPS_IE to include PRAW signaling.

Young Hoon Kwon, Huawei

straw poll
Straw Poll

Do you support to modify RPS_IE to include PRAW signaling as shown in slide 6?

Young Hoon Kwon, Huawei

references
References

[1] IEEE 802.11-12/1311r0 Periodic channel access

[2] IEEE 802.11-12/0843r0 Restricted Access Window signaling for uplink channel access

Young Hoon Kwon, Huawei