Non-R-TWT member STA access grant for burst traffic transmission
A non-AP STA, which is a scheduled STA having membership in an R-TWT scheduled STA, having an enqueued urgent burst of RTA traffic for the AP during an ongoing R-TWT SP of which it does not have R-TWT membership, is enabled to initiate R-TWT negotiation with the scheduling AP inside the ongoing R-TWT SP to either request a temporary or a long-term membership of the current ongoing R-TWT SP or request to setup a new temporary or long-term R-TWT SP after the current SP, but before the SP it originally had membership in, or to contend for an RA-RU in the current R-TWT SP if UORA feature is enabled. Thus, a non-R-TWT member STA is granted access for its burst traffic transmissions.
1 . An apparatus for wireless communication in a network, the apparatus comprising:
(a) a wireless communication circuit, as a wireless station (STA) which is a separate STA or as a STA in a multiple-link device (MLD), and operating as either a regular STA or an Access Point (AP) STA, for wirelessly communicating with other wireless stations (STAs) using a carrier sense multiple access/collision avoidance (CSMA/CA) mechanism on a wireless local area network (WLAN) in which enhanced distributed channel access (EDCA) is utilized for random channel access on all the links;
(b) a processor coupled to said wireless communication circuit for operating on the WLAN;
(c) a non-transitory memory storing instructions executable by the processor for communicating with other STAs; and
(d) wherein said instructions, when executed by the processor, perform steps of a wireless communications protocol for said wireless communication circuit, comprising:
(i) enqueuing an urgent burst of real-time application (RTA) traffic by a non-AP STA for transmission to the AP during an ongoing restricted target wake time (R-TWT) service period (SP), in which said non-AP R-TWT STA does not have an R-TWT membership;
(ii) initiating an R-TWT negotiation from said non-AP STA, with the AP for performing scheduling as a scheduling AP, inside the ongoing R-TWT SP, wherein said negotiation contains a request: (A) for either a temporary or a long-term membership in a specific R-TWT SP which is either the current R-TWT SP or an R-TWT SP after the currently ongoing R-TWT SP but before the R-TWT SP that the non-AP STA originally had R-TWT membership for, or (B) for contending for a random access-resource unit (RA-RU) in the current R-TWT SP if the uplink orthogonal frequency division multiple access-based random access (UORA) feature is enabled;
(iii) wherein said scheduling AP may accept or reject the membership request from the non-AP STA making the membership request, or it may indicate an alternate R-TWT setup or dictate a preferred R-TWT setup from the STA; and
(iv) wherein in response to the membership request being accepted, said non-AP STA transmits its urgent burst of RTA traffic: (A) in the specific R-TWT SP; or (B) contends for a RA-RU in the current R-TWT SP if UORA is enabled.
2 . The apparatus of claim 1 , wherein said R-TWT negotiation is based on said non-AP STA transmitting a TWT request frame and receiving a TWT response frame, each of these frames carrying TWT information elements comprising a negotiation type subfield which indicates this form of negotiation.
3 . The apparatus of claim 2 , wherein said TWT information elements are further comprising a subfield of a request type field for indicating temporary or long-term membership in the current R-TWT, which can be used by said scheduling AP for indicating whether membership is accepted.
4 . The apparatus of claim 1 , wherein UORA may be enabled in response to setting a value in the broadcast TWT recommendation field to request enabling UORA with at least one RA-RU feature in the R-TWT.
5 . The apparatus of claim 1 , wherein a non-AP STA which is scheduled for any R-TWT can contend for an RA-RU transmission in the current R-TWT SP if UORA is enabled.
6 . The apparatus of claim 1 , wherein a non-AP STA which is not scheduled for any R-TWT can contend for an RA-RU transmission in the current R-TWT SP if UORA is enabled.
7 . The apparatus of claim 6 , wherein upon its OFDMA backoff (OBO) counter reaching a terminal count, a non-AP STA, despite not being an R-TWT member STA can directly send a UL PPDU using one RA-RU or can send a buffer status report (BSR) in the RA-RU to allow said scheduling AP to allocate specific RUs to it for performing directly access in the next triggered UL PPDU transmission.
8 . The apparatus of claim 1 , wherein the non-AP STA which is an R-TWT scheduled STA requests to join the current R-TWT SP using a guaranteed unicast RU allocated to a specific association identification (AID) owned by it.
9 . The apparatus of claim 8 , wherein a value of the broadcast TWT recommendation field indicates a request for said guaranteed unicast RU allocation.
10 . The apparatus of claim 8 , wherein said guaranteed unicast RU allocation cannot be scheduled at the beginning of any R-TWT SP.
11 . The apparatus of claim 8 , wherein the non-AP STA which is scheduled for any R-TWT can initiate said guaranteed unicast RU allocation during the current ongoing R-TWT SP by exchanging negotiation frames with said scheduling AP.
12 . The apparatus of claim 8 , wherein upon receiving an acceptance message from said scheduling AP, the non-AP STA can immediately access the guaranteed unicast RU assigned to its AID to transmit in this R-TWT SP.
13 . The apparatus of claim 1 , wherein said non-AP STA, which is an R-TWT scheduled STA, can contend for a new group association identification (AID) on allocated RA-RU(s) that are designated for non-AP STAs which are not R-TWT members.
14 . The apparatus of claim 13 , wherein the broadcast TWT recommendation field is set to a specific value to indicate enabling RA-RU access for non-AP STAs that are not R-TWT members.
15 . The apparatus of claim 13 , wherein contending for a new group association identification (AID) on allocated RA-RU(s) can be scheduled at the beginning of any R-TWT SP.
16 . The apparatus of claim 13 , wherein said new AID is carried in a beacon frame and broadcast periodically.
17 . The apparatus of claim 13 , wherein the non-AP STA, which has not obtained membership in a current R-TWT SP, can contend for access to the RA-RU(s) specifically assigned to the new group AID to transmit in this R-TWT SP.
18 . The apparatus of claim 1 , wherein said non-AP STA, which is a scheduled R-TWT STA can: (A) be assigned a temporary membership of the current ongoing R-TWT SP for one time; (B) be assigned a long-term membership can be torn down at any time.
19 . The apparatus of claim 1 , wherein said non-AP STA that is a scheduled R-TWT member that is a MLD STA can request to setup different R-TWT agreements on its multiple links.
20 . An apparatus for wireless communication in a network, the apparatus comprising:
(a) a wireless communication circuit, as a wireless station (STA) which is a separate STA or as a STA in a multiple-link device (MLD), and operating as either a regular STA or an Access Point (AP) STA, for wirelessly communicating with other wireless stations (STAs) using a carrier sense multiple access/collision avoidance (CSMA/CA) mechanism on a wireless local area network (WLAN) in which enhanced distributed channel access (EDCA) is utilized for random channel access on all the links;
(b) a processor coupled to said wireless communication circuit for operating on the WLAN;
(c) a non-transitory memory storing instructions executable by the processor for communicating with other STAs; and
(d) wherein said instructions, when executed by the processor, perform steps of a wireless communications protocol for said wireless communication circuit, comprising:
(i) enqueuing an urgent burst of real-time application (RTA) traffic by a non-AP STA for transmission to the AP during an ongoing restricted target wake time (R-TWT) service period (SP), in which said non-AP R-TWT STA does not have an R-TWT membership;
(ii) initiating an R-TWT negotiation from said non-AP STA, with the AP for performing scheduling as a scheduling AP, inside the ongoing R-TWT SP, wherein said negotiation contains a request: (A) for either a temporary or a long-term membership in a specific R-TWT SP which is either the current R-TWT SP or an R-TWT SP after the currently ongoing R-TWT SP but before the R-TWT SP that the non-AP STA originally had R-TWT membership for, or (B) for contending for a random access-resource unit (RA-RU) in the current R-TWT SP if the uplink orthogonal frequency division multiple access-based random access (UORA) feature is enabled;
(iii) wherein said R-TWT negotiation is based on said non-AP STA transmitting a TWT request frame and receiving a TWT response frame, each of these frames carrying TWT information elements comprising a negotiation type subfield which indicates this form of negotiation;
(iv) wherein said TWT information elements comprise a subfield of a request type field for indicating temporary or long-term membership in the current R-TWT, which can be used by said scheduling AP for indicating whether membership is accepted;
(v) wherein said scheduling AP may accept or reject the membership request from the non-AP STA making the membership request, or it may indicate an alternate R-TWT setup or dictate a preferred R-TWT setup from the STA;
(vi) wherein in response to the membership request being accepted, said non-AP STA transmits its urgent burst of RTA traffic: (A) in the specific R-TWT SP; or (B) contends for a RA-RU in the current R-TWT SP if UORA is enabled; and
(vii) wherein UORA may be enabled in response to setting a value in the broadcast TWT recommendation field to request enabling UORA with at least one RA-RU feature in the R-TWT.
21 . A method of performing wireless communication in a network, the method comprising:
(a) communicating between wireless stations (STAs) that are either separate STAs or STAs within a multiple-link device (MLD), and each of which operates as either an Access Point (AP), or a non-AP STA, for wirelessly communicating with other wireless STAs using a carrier sense multiple access/collision avoidance (CSMA/CA) mechanism on a wireless local area network (WLAN) in which enhanced distributed channel access (EDCA) is utilized for random channel access on all the links;
(b) enqueuing an urgent burst of real-time application (RTA) traffic by a non-AP STA for transmission to the AP during an ongoing restricted target wake time (R-TWT) service period (SP), in which said non-AP R-TWT STA does not have an R-TWT membership;
(c) initiating an R-TWT negotiation from said non-AP STA, with the AP for performing scheduling as a scheduling AP, inside the ongoing R-TWT SP, wherein said negotiation contains a request: (A) for either a temporary or a long-term membership in a specific R-TWT SP which is either the current R-TWT SP or an R-TWT SP after the currently ongoing R-TWT SP but before the R-TWT SP that the non-AP STA originally had R-TWT membership for, or (B) for contending for a random access-resource unit (RA-RU) in the current R-TWT SP if the uplink orthogonal frequency division multiple access-based random access (UORA) feature is enabled;
(d) wherein said scheduling AP may accept or reject the membership request from the non-AP STA making the membership request, or it may indicate an alternate R-TWT setup or dictate a preferred R-TWT setup from the STA; and
(e) wherein in response to the membership request being accepted, said non-AP STA transmits its urgent burst of RTA traffic: (A) in the specific R-TWT SP; or (B) contends for a RA-RU in the current R-TWT SP if UORA is enabled.