1. Block Addressed WUR Frame
doc.: IEEE yy/XXXXr0
Month Year
Block Addressed WUR Frame
Date:
Authors:
Name
Affiliation
Address
Li Nan
ZTE
Corporation
No.9 Wu Xing Section
Xi Feng Road
Xi’an, Shaanxi Province P.R.China
Lv Kaiying
Sun Bo
Wei Ning

2. Abstract
As defined in Draft D0.4, the Address field of the WUR Wake-up frame is set to
The WUR ID when the frame is individually addressed
The group ID when the frame is group addressed
The transmit ID when the frame is broadcast addressed
0 when multiple WIDs are included in the Frame Body field of the frame.
A WUR frame with group ID in the Address field is a group addressed WUR frame that is addressed to all the WUR STAs identified by that group ID.
An WUR AP shall indicate the group IDs assigned to a WUR STA in the Group ID List subfield of the WUR Parameters field of the WUR Mode element that is sent to the STA if the STA indicates the Support Group IDs
A method about multiple WID addressed WUR frame with flexible multi-WID grouping is proposed in this proposal.

3. Proposal
AP uses block granularity parameters to divide WUR STA addressing space into blocks. Block granularity parameter means how many WUR STAs with contiguous WIDs in WUR addressing space are contained in one block.
AP signals block granularity parameters to WUR STAs in WUR Operation element.
AP implicitly signals block IDs by mapping the WUR ID space with granularity parameters
The WUR STAs are grouped based on the block granularity parameters, and each block is identified the block ID.
Eg. block granularity parameter may be set to 2 octets, 4 octets, 8 octets and 16 octets, respectively.
A specific WUR STA can belong to multiple blocks with different block granularity.

4. Block ID Allocation Scheme
IDs for WUR STA(WID) …
block granularity x
Block ID numbering #1 #2 #3 #4
# m …
block granularity 2x
STA 1 to 16
STA 17 to 32
# m+1
# n
STA 1 to 32
As an example shown above, one WUR STA can belong to multiple blocks based on the block granularity.
WUR STAs of range 1 to 16 belong to block ID #1 and STAs of range of 17 to 32 belongs to block ID #2 respectively when block granularity is x
WUR STAs of range of 1 to 32 belong to block ID #m+1 when block granularity is 2x
When ONLY STAs within range 1 to 16 are to be waken up, the AP can send a multi-WID addressed wake-up frame with block ID #1 for example.
When STAs within range of 1 to 32 are to be waken up, the AP can send a multi-WID addressed wake-up frame with block ID #m+1 for example.
A block ID identifies a group of one or more WUR STAs and is selected from a group ID space, obtained from the identifier’s space.

5. Block addressed WUR frame format
A Block addressed WUR frame is a WUR frame with the proposed definition of the subfields as below.
Frame Control field:
the Length Present field is set to 0 to indicate the Length/Misc field contains Misc field
Address filed: The address field is set to block ID
NO frame body field

6. Conclusion
We discussed flexible Block ID allocation scheme in this proposal.
AP notifies block granularity parameters to WUR STAs.
By knowing block granularity, a WUR STA could determine which block(s) it belongs, and its position in the block(s).
AP signals a block addressed WUR frame using the block ID in the address field.
By using this scheme,
AP does not need to explicitly signal the specific block IDs which the WUR STA belongs to.
Only WUR STAs belonging to a block indicated in the address field of the WUR frame will wake up.

7. Straw Poll 1
Do you agree the Block ID allocation scheme shown in slide 3 and 4?

8. Straw Poll
Do you agree the block addressed WUR frame format in slide 5?

9. Proposed text change 31.3 Setting the identifiers of WUR frames
General
The compressed BSSID is equal to the 32-bit CRC calculated over the BSSID contained in Beacon frames transmitted by the WUR AP (calculation is performed as defined in (FCS field) where the BSSID is the calculation fields).The Address field of WUR frames contains an identifier (ID) that is selected from the range 0 to Each identifier can be a transmit ID, which is obtained from the compressed BSSID (see (Transmit ID)), group ID (see (Group ID)), or a WUR ID (see (WUR ID)), or a block ID (see (Block ID)).
Block ID
A block ID identifies a group of one or more WUR STAs which belong to the same WID block based on block granularity parameters from the most recent WUR Operation element sent by AP and is selected from a group ID space obtained from the identifier’s space. A WUR frame with the block ID in the Address field is a block addressed WUR frame that is addressed to all the WUR STAs identified by the block ID in the address field of the received WUR frame.
A WUR STA that has indicated support for block IDs shall determine the block IDs based on block granularity parameters from the most recent WUR Operation element received from AP.

10. Identifier Description
Proposed text change
Address field
The Address field contains an identifier for the WUR frame. The identifier is selected from Table 9-533b (Identifiers of WUR frames) and depends on the type of WUR frame (see (Format of individual WUR frame types)).
Address field
Identifier Description
Transmit ID
Identifier of the transmitting AP (see (Transmit ID))
Group ID
Identifier of a group of receiving WUR STAs (see (Group ID))
WUR ID
Identifier of an individual receiving WUR STA (see (WUR ID))
Block ID
Identifier of a block of receiving WUR STAs (see (Block ID))
OUI1
The 12 MSBs of the OUI (see (Organization Identifier field))

11. WID Block granularity parameters
Proposed text change
WUR Operation element
The WUR Operation element contains the set of parameters necessary to support the WUR operation. The format of the WUR Operation element is defined in Figure 9-751h (WUR Operation element format).
Octets
Figure 9-751h WUR Operation element format
The format of the WID Block granularity parameters field is defined in Figure 9-751j (WID Block granularity parameters field format).
B B B B B24 B B B B39
Bits
The Starting WID field indicates the starting WID in the WID space.
The Ending WID field indicates the ending WID in the WID space.
The Starting block ID field indicates the starting block ID in the identifier space
Basic unit field indicates the number of WIDs that the basic block contains
Scale factor field indicates the scale that apply to the basic unit; “0” means 2x and “1” means 4x
WID Block granularity parameters
Block ID space info
Block granularity
Starting WID
Ending WID
Starting block ID
Basic unit
Scale factor

12. References
[1]Draft P802.11ba D0.4