AID Reassignment Protocol

1. AID Reassignment Protocol Authors: Date: 2012-05-14 Jeongki Kim, LG Electronics

2. Authors: Jeongki Kim, LG Electronics

3. 802.11 ah requirements need to support large number of stations (e.g., 6000 stations) [1] • Grouping STAs into a group can be useful to efficiently manage large number of stations • An AID set may also be used for a group and it can reduce the TIM overhead [2]. That is, AID can imply the group ID • E.g.,) AIDs (0~1000) is used for Group 1, AIDs(1001~2000) is used for Group 2 • STAs supporting different use cases will be grouped into different Pages Introduction Jeongki Kim, LG Electronics

4. In some case AP may change the page/group of a STA into another group for channel access management • Saturation of traffic density of a page/group • Change of a STA’s traffic characteristic • To change the group of a STA, AP will reassign the STA’s AID Needs for AID reassignment Jeongki Kim, LG Electronics

5. Saturation of traffic density of a page/group • Different classes of STAs can be grouped into different pages/groups • e.g.,) Sensor STAs in Page/Group 1(low duty cycle) and Offloading STAs in Page/Group 2 (high duty cycle) • STAs in the same class may be grouped to different groups for load distribution of a group • e.g., Group 2/Group 3 for offloading STAs • In real environment the traffic density of a group may be larger than that of other groups • For load distribution of each group, AP may change the group of a STA Needs for AID reassignment Jeongki Kim, LG Electronics

6. Change of the STA’s traffic characteristic • The traffic characteristic of a STA may be changed • E.g., when emergency traffic happens • In case of the change of the STA’s traffic characteristic, a STA may request the change of AID group to AP (e.g., Low duty cycle (LDT) high duty cycle(HDT)) • AP can re-assign the STA’s AID in response to the request of a STA or by unsolicited method Needs for AID reassignment Jeongki Kim, LG Electronics

7. To assign AID dynamically, • AP can re-assign a STA’s AID with management frame for channel access management • STA can request to change its AID for channel access management • i.e.,) Will move to another AID group • AID assignment request frame • STA sends AID assignment request to AP • To query re-assigning its AID • The details of the request frame are TBD • AID assignment response frame • AP sends AID assignment response to STA • To announce re-assigned AID • The details of the response frame are TBD AID reassignment protocol Jeongki Kim, LG Electronics

8. In some case, AP may change the group of a STA for efficient channel access management (e.g., for load distribution of channels) To change the group of a STA, an AP will re-assign a STA’s AID An STA may request the re-assignment of the STA’s AID to an AP associated with the STA Conclusion Jeongki Kim, LG Electronics

9. Do you support that a STA’s AID can be re-assigned for channel access management? Straw Poll Jeongki Kim, LG Electronics

10. [1] 11/11-905r3 “TGah Functional Requirements and Evaluation Methodology.” [2] 12/0388r1, “TGah Efficient TIM Encoding” Reference Jeongki Kim, LG Electronics

11. Do you support to include in the spec framework, in section 4.3, a STA’s AID can be re-assigned for channel access management? Motion Jeongki Kim, LG Electronics