Mediatek Singapore Pte. Ltd.

Other

Mediatek Corporation

Kai Ying Lu

Yongho Seok

James Chih-Shi Yee

Jianhan Liu

Thomas Edward Pare

Chao-Chun Wang

Gabor Bajko

Chien-Fang Hsu

Hung-Tao Hsieh

James June-Ming Wang

Shengquan Hu

Cheng-Yi Chang

Gary Allen Anwyl

Weisung Tsao

Yungping Hsu

Yen-Shuo Lu

Po-Yuen Cheng

Yonggang Fang

Jr Thomas Edward Pare

A station (STA) affiliated with a non-simultaneous-transmission-and-reception (NSTR) multi-link device (MLD) obtains a transmission opportunity (TXOP) on a first link of an NSTR link pair as a TXOP initiator while a medium synchronization delay timer of the STA is non-zero. STA determines that an intended TXOP responder has lost medium synchronization. The STA then transmits a control frame as an initial frame in the TXOP to the intended TXOP responder on the first link responsive to the determining.

Medium access recovery mechanism for non-simultaneous-transmission-and-reception peer multi-link devices

Embodiments of the present invention provide A TID-based RTWT SP that can be configured for either trigger-based transmission or EDCA-based transmission for time sensitive traffic to reduce the chance of contention/collision on time sensitive traffic caused by non-time sensitive traffic using an EDCA mechanism. This can also reduce the chance of contention on time sensitive traffic when both trigger-based transmission and EDCA-based-transmission are used in the same TID-based RTWT SP. The AP MLD can dynamically adjust the schedule of TID-SPs for ether trigger-based or EDCA-based transmission and announce the new schedule of the TID-SPs according to the requirements of time sensitive traffic and/or traffic load condition, and can prioritize time sensitive transmission to meet QoS requirements.

Prioritized service period for time sensitive transmissions

A station (STA) associated with an access point (AP) receives, from the AP, an indication of an enhanced distributed channel access (EDCA) parameter set. The STA then updates one or more parameters of the EDCA parameter set with respect to a triggered transmission opportunity (TXOP) sharing (TXS) operation.

EDCA schemes for triggered TXOP sharing operations

A station (STA) receives an indication from a first access point (AP) on one of a plurality of links that is not a non-primary link among the plurality of links comprising at least a primary link and the non-primary link. Based on the indication, the STA determines that: (i) the first AP is affiliated with a non-simultaneous-transmit-and-receive (NSTR) AP multi-link device (MLD), and (ii) a second AP, as a neighbor AP of the first AP, is affiliated with the NSTR AP MLD and is operating on the non-primary link.

System parameters transmission scheme in wireless communications

Embodiments of the present invention provide an improved switching mechanism for multi-link devices that can perform frame exchanges using multiple spatial streams and automatically switch back to a listening mode on enabled links deterministically for improved throughput and reduced latency. Embodiments of the present invention are suitable for multi-link operations performed using a multi-radio device or a single-radio device.

Enhanced multi-link operation switching mechanisms

Multi-link operations can provide higher network throughput and improved network flexibility compared to traditional techniques for wireless communication. Embodiments of the present invention provide techniques for simultaneously transmitting frames of an A-MSDU over multiple links in a multi-link operation between wireless devices (e.g., a wireless STA and a wireless AP). The A-MSDU can be aggregated to satisfy capability requirements of the transmitting device and/or the receiving device. Moreover, the A-MSDU can be fragmented, for example, to satisfy an MPDU length requirement of the transmitting device and/or the receiving device. Some embodiments disclosed herein use a virtual mac address of an LLC sublayer interface to define parameters values of an A-MSDU sub-frame header (e.g., SA and DA) for routing the respective frame to the LLC sublayer interface of the receiving device.

Apparatus and methods for EHT multi-band A-MSDU operation

Embodiments of the present invention are drawn to electronic systems capable of transmitting a group addressed frame that identifies an MLD according to an MLD MAC address. The group addressed frame can include an ARP request, for example, and can be transmitted by an AP MLD responsive to an individually addressed frame transmitted by a non-AP STA MLD associated with the AP MLD. The AP MLD can provide a proxy ARP service for associated non-AP STA MLDs.

Apparatus and methods for proxy address resolution protocol (ARP) service for multi-link operation

Multi-link operations can provide higher network throughput and improved network flexibility compared to traditional techniques for wireless communication. Embodiments of the present invention provide a method of frame transmission that prevents constrained MLDs from transmitting and receiving frames on multiple links simultaneously using a novel and reliable group addressed frame transmission schedule for constrained MLDs. Group addressed frames are frames that are transmitted to several devices (e.g., broadcast) listening on a wireless link. It is important to carefully schedule group addressed frames for reception by MLDs to prevent IDC interference. According to some embodiments, group addressed frames are only transmitted when all MLDs listening on a wireless link are not transmitting data to prevent IDC interference.

Group addressed frame wireless transmission for constrained multi-link operation

Embodiments of the present invention provide methods and devices for discovering a multi-link device (MLD) on a wireless network. One exemplary approach includes transmitting a beacon frame including a MAC address of an AP MLD on the wireless network. The AP MLD includes a plurality of STAs operating on a plurality of wireless links and associated with a plurality of wireless MAC addresses. A password element is generated using a preconfigured password and the MAC address of the AP MLD, and authentication is performed using the password element.

Methods and devices for multi-link device (MLD) address discovery in a wireless network

A traffic indication signaling method includes: setting a control information subfield in an aggregated control (A-Control) subfield by traffic indication information, wherein the traffic indication information contains timing information of uplink (UL) traffic; and transmitting a frame that includes the A-Control subfield to an access point (AP). For example, the UL traffic is required by a latency sensitive traffic application.

Methods of using aggregated control subfield for traffic indication signaling

Embodiments of the present invention provide duplication schemes for control frames to extend the range of LPI in the 6 GHz wireless band for EHT WLAN. Duplicate 20 MHz legacy preambles containing L-STF, L-LTF, L-SIG and RL-SIG, U-SIG and EHT-SIG fields may be used to transmit beacon and other control frames using duplicate PPDUs to extend transmission range thereof. Non-HT duplication can be performed to maintain backwards compatibility with legacy devices. HE duplication can include duplication of a 20 MHz HE SU PPDUs over 40 MHz, 80 MHz, 160 MHz or 320 MHz portions, for example. DCM+MCSor duplication over DCM+MCSmay be applied to the payload, and a duplication indication is inserted in the U-SIG field or EHT-SIG field to indicate if the duplication is applied to the payload over DCM+MCS

Systems and methods of low power indoor transmission in a wireless network

Embodiments of the present invention provide methods and devices for performing admission control in a wireless network. Admission control can be used to set usage limits for wireless devices in the network. When admission control is enabled, a wireless station does not transmit frames if the current channel usage time is greater than a predefined time limit. The admission control parameters can be specific to an access category (AC), such as best effort (BE), voice (VO), video (VI), and background (BK). According to some implementations, the admission control is performed on a link-level. According to other implementations, the admission control is performed at a multi-link device (MLD) level.

Methods and devices for multi-link contention based admission control in a wireless network

Various schemes pertaining to bandwidth indication with preamble puncturing in wireless communications are described. An apparatus (e.g., a station (STA)) receives a control frame and, in response, transmits a control response frame. In the control frame, either or both of a scrambling sequence and a SERVICE field are set to indicate bandwidth and preamble puncturing information.

Bandwidth indication with preamble puncturing in wireless communications

A first station (STA) and a second STA perform bandwidth negotiation with a bandwidth extension indication. Then the first STA and the second STA communicate wirelessly according to the bandwidth negotiation.

Bandwidth extension indication and negotiation in wireless communications

A plurality of different medium access control (MAC) addresses are assigned to a plurality of virtual access point (AP) multi-link devices (MLDs) that are implemented within a physical AP MLD such that each of the plurality of virtual AP MLDs is assigned a respective MAC address of the plurality of different MAC addresses. Wireless communications are then established with one or more stations (STAs) over a plurality of links.

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San Jose, CA, United States of America

Kai Ying Lu