Patent ID: 11910300
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The method according to the claim 1, further comprising:
determining, by the first STA, that the first STA is allowed to respond to the probe request frame in response to a condition for shall-not-respond not being met;
wherein, for the first STA that receives the probe request frame, the condition shall-not-respond comprises any of the following conditions a), c), d), e), f), g), h), i), j), or k):
a) the first STA does not match any of the following criteria:
1) the first STA is an AP,
2) the first STA is an independent basic service set (IBSS) STA,
3) the first STA is a mesh STA,
4) the first STA is a directional multi-gigabit (DMG) STA that is not a member of a personal basic service set (PBSS) and that is performing active scan, or
5) the first STA is a personal basic service set (PBSS) control point (PCP);

c) the first STA is a non-AP STA in an infrastructure basic service set (BSS) and the Address 1 field of the probe request frame contains the broadcast address,
d) the first STA is a non-PCP STA in a PBSS and the Address 1 field of the probe request frame contains the broadcast address,
e) the first STA is in an IBSS and did not transmit a Beacon or DMG Beacon frame since the last target beacon transmission time (TBTT), and the Address 1 field of the probe request frame contains the broadcast address,
f) the first STA is a mesh STA and either of the following criteria are met:
1) the probe request frame does not contain a Mesh ID element,
2) the Mesh ID element in the probe request frame is present but does not contain the wildcard Mesh ID and does not match the Mesh ID of the mesh basic service set (MBSS) with which the first STA is peered;

g) the first STA is not a mesh STA and none of the following criteria are met:
1) the SSID in the probe request frame is the wildcard SSID,
2) the SSID in the probe request frame matches the SSID of the first STA's,
3) the SSID List element is present in the probe request frame and includes the SSID of the first STA's BSS,

h) the first STA is not a mesh STA and the Address 3 field of the probe request frame does not contain a wildcard BSSID and does not match the BSSID of the first STA's BSS,
i) the first STA has dot11InterworkingServiceActivated equal to true and the probe request frame contains an Interworking element and an Extended Capabilities element whose Interworking field contains the value 1, and at least one of the following criteria is not met:
1) the HESSID field of the Interworking element is absent, or is present and contains the wildcard HESSID or matches the HESSID field of the InterworkingInfo parameter of the last MLME-START.request or MLME-JOIN.request primitive,
2) the Access Network Type field of the Interworking element contains the wildcard access network type or matches the access network type of the first STA,

j) the probe request frame contains a direct sequence spread spectrum (DSSS) Parameter Set element in which the Current Channel field contains a value that is not the same as dot11CurrentChannel, or
k) the first STA is a DMG STA and the transmit antenna of the DMG STA is not trained to transmit to the first STA from which the probe request frame was received.