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Multiple Link Operation Capability Announcement

This study by Liwen Chu et.al. from Marvell discusses the capability of multiple link logical entities in transmission and reception. It focuses on the announcement and restrictions of multi-link operation, including channel switching and interference cancellation.

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Multiple Link Operation Capability Announcement

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  1. Multiple Link Operation Capability Announcement Date: 2019-07-06 Authors: Liwen Chu et al (Marvell)

  2. A multi-link logical entity can include multiple links. • The capability to use multiple links by a multi-link logical entity should be announced. • Whether a multi-link logical entity can do transmission while reception in more than one link. Recap: Multi Link Operation Common Function Link1 MAC/PHY Link2 MAC/PHY Liwen Chu et al (Marvell)

  3. A multi-link logical entity supports only one link at any time. • A multi-link logical entity supports more than one link at any time: • A multi-link logical entity that supports multiple links at any time can announce the following capabilities for each pair of links: • Support the transmission on a link concurrently with reception on another link • Doesn’t support the transmission on a link concurrently with reception on another link • The announced capability is decided by the frequency distance between two links (e.g. | the center frequency of link1 – the center frequency of link2 | ) and the interference canceling capability between two links. Restriction of Multiple Link Operation Multi-link logical AP entity A-MPDU from STAx1 to AP1 Link 1 Common Function AP2 MAC/PHY in link2 AP1 MAC/PHY in link1 Link 2 A-MPDU from AP2 Liwen Chu et al (Marvell)

  4. A multi link logical entity may include more than two links The multi-link operation capability about transmission while reception is defined every two links. Link Operation Capability Announcement Multi-link logical entity Common Function MAC/PHY in link3 MAC/PHY in link1 MAC/PHY in link2 Liwen Chu et al (Marvell)

  5. A multi-link AP entity may do channel switch in one link during the BSS operation. If after the channel switch operation, the frequency distance between two links becomes smaller, a multi-link AP/STA entity assumes that the peer multi-link AP/STA entity can’t do transmission while reception within these two links. If after the channel switch operation, the frequency distance between two links becomes larger, a multi-link AP/STA entity assumes that a peer multi-link AP/STA entity can do transmission while reception within these two links if the peer multi-link AP/STA entity can do transmission while reception before the channel switch. Capability Announcement and Channel Switch Liwen Chu et al (Marvell)

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