Wireless multicast communication
    23.
    发明授权

    公开(公告)号:US10212694B2

    公开(公告)日:2019-02-19

    申请号:US15618960

    申请日:2017-06-09

    Applicant: Apple Inc.

    Abstract: This document describes multicast communication between wireless devices. A scheduling frame may be wirelessly transmitted by a wireless device. The scheduling frame may include a multicast address indicating a group of intended receiving devices for a payload frame. The scheduling frame may further include scheduling information indicating an order for the group of intended receiving devices to transmit acknowledgement information for the payload frame. A payload frame may also be wirelessly transmitted by the wireless device. The payload frame may include payload information intended for the group of intended receiving devices. Additionally, acknowledgement frames may be wirelessly received by the wireless device from at least a subset of the group of intended receiving devices. The acknowledgement frames may be received according to the order indicated in the scheduling information.

    Association Identifier Change and Obfuscation in WLAN Communication

    公开(公告)号:US20240406906A1

    公开(公告)日:2024-12-05

    申请号:US18325213

    申请日:2023-05-30

    Applicant: Apple Inc.

    Abstract: An electronic device is described. This electronic device may associate with a second electronic device (such as an access point) in a WLAN. While associating or associated with the second electronic device, the electronic device may receive, from the second electronic device, an AID corresponding to the electronic device for use when communicating frames in the WLAN. Moreover, while associated with the second electronic device, the electronic device may obtain a second AID corresponding to the electronic device for use when communicating second frames in the WLAN, where the associating includes replacing the AID with the second AID. Note that obtaining the second AID may include: the electronic device selecting the second AID from a predefined set of AIDs, which were previously received from the second electronic device; or the electronic device receiving, from the second electronic device, the second AID.

    Privacy Enhanced BSS and Discovery Mechanisms

    公开(公告)号:US20230147562A1

    公开(公告)日:2023-05-11

    申请号:US17949910

    申请日:2022-09-21

    Applicant: Apple Inc.

    CPC classification number: H04W12/037 H04W12/06

    Abstract: Systems, methods, and mechanisms for a privacy enhanced basic service set (BSS), including privacy enhancements for both access points and wireless stations as well as privacy enchantments for authentication, association, and discovery operations. Further, the systems, methods, and mechanisms disclosed may continue to support legacy wireless stations and are thus, backward compatible. A station may communicate with a legacy BSS of a wireless network to transition to a PE BSS of the wireless network. The station may receive, from the PE BSS of the wireless network, an encrypted beacon, wherein the encrypted beacon is decoded based on information received from the legacy BSS and perform, with the PE BSS of the wireless network, an encrypted handshake procedure to authenticate and associate with the PE BSS of the wireless network.

    Privacy Enhanced BSS Discovery for Non-associated Stations

    公开(公告)号:US20230144897A1

    公开(公告)日:2023-05-11

    申请号:US17949933

    申请日:2022-09-21

    Applicant: Apple Inc.

    CPC classification number: H04W48/08 H04W48/16

    Abstract: Systems, methods, and mechanisms for a privacy enhanced basic service set (BSS), including privacy enhancements for both access points and wireless stations as well as privacy enchantments for authentication, association, and discovery operations. Further, the systems, methods, and mechanisms disclosed may continue to support legacy wireless stations and are thus, backward compatible. A non-associated PE station may receive, from a PE access point, one or more discovery beacons advertising PE BSSs hosted by the PE access point and transmit, to the PE access point, a request to setup pre-association security protection. The non-associated PE station may, upon setup of pre-association security protection, transmit, to the PE access point, a protected request frame and receive, from the PE access point, a protected response that includes PE access point parameters.

    Precise Time Management for Peripheral Device Using Local Time Base

    公开(公告)号:US20230091434A1

    公开(公告)日:2023-03-23

    申请号:US17482178

    申请日:2021-09-22

    Applicant: Apple Inc.

    Abstract: An apparatus for time management of a peripheral device is disclosed. A peripheral interface circuit receives information from a host circuit over a peripheral bus, the host circuit maintaining a global timebase in accordance with a first clock signal within a first clock domain. The peripheral interface circuit maintains, based om a second clock signal within a second clock domain, a first local timebase correlated to the global timebase. A peripheral control circuit operates in a third clock domain and maintains a second local timebase based on the first. The peripheral interface circuit determines phase and frequency differences between the second and third clock signals in determining a correlation between the second and first local timebases. A peripheral logic circuit in the third clock domain performs, operations that utilize a timestamp from the second local timebase, which accounts for correlation with the first local timebase.

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