Abstract: A method includes obtaining, by a transmit-receive point (TRP), a set of power metrics for multiple UEs including a served UE and one or more helped UEs, wherein each power metric is estimated from multiple channel quality and performance indicators of one of the multiple UEs. The method also includes calculating a performance metric as a function of at least one of the multiple channel quality and performance indicators of the served UE. The method also includes calculating an interference metric as a function of the set of power metrics. The method also includes determining whether to perform coordinated beamforming based on the performance metric and the interference metric. The method also includes determining one or more precoders based on the determination of whether to perform the coordinated beamforming.

Abstract: Methods and apparatuses for modular MIMO system and CSI feedback in a wireless communication system. The methods and apparatuses include: identifying configuration information of an antenna system including antenna modules for a MIMO operation; identifying, based on the configuration information, a number of collocated antenna groups that each includes one or more of the antenna modules; identifying, based on the configuration information, a number of the antenna modules for each type of the antenna modules in each of the collocated antenna groups, wherein each of the collocated antenna groups includes one or more types of the antenna modules; generating a CSI report for one or more of the collocated antenna groups in the antenna system; and transmitting, to a BS, the CSI report.

Abstract: A base station includes a plurality of antennas, a data unit (DU) comprising a first processor and a first memory containing instructions, which when executed by the first processor, cause the DU to receive a signal to be transmitted via the plurality of antennas, obtain per-antenna-power-constraint (PAPC) information, determine an estimated effective transmission power (Peff) based on the PAPC information, and pre-schedule the signal for transmission based on the Peff. The base station further includes a massive MIMO unit (MMU) comprising a second processor and a second memory containing instructions, which when executed by the second processor, cause the MMU to receive, from the DU, the pre-scheduled signal, perform pre-coding on the pre-scheduled signal based on a current value of a PAPC determined at the MMU to normalize per-antenna gain of antennas of the plurality of antennas, and provide the pre-coded signal for transmission via the plurality of antennas.

Abstract: Embodiments of the present disclosure provide methods and apparatuses for facilitating restricted target wake time (TWT) operation in a wireless local area network. The apparatuses include a non-access point (AP) multi-link device (MLD) comprising a plurality of stations (STAs) and a processor. Each STA comprises a transceiver configured for broadcast TWT operation on multi-link operation (MLO) links with corresponding APs of an AP MLD. The processor is operably coupled to the transceivers, and configured to negotiate a broadcast TWT schedule over a first link between a first STA and a first AP of the AP MLD, apply the broadcast TWT schedule to the group of links, negotiate a restricted TWT schedule with the AP MLD over at least one link of the group of links, and establish the restricted TWT schedule on one or more links of the at least one link.

Abstract: Embodiments of the present disclosure provide methods and apparatuses for facilitating restricted target wake time (TWT) operation in a wireless local area network. The apparatuses include a non-access point (AP) multi-link device (MLD) comprising a plurality of stations (STAs) and a processor. Each STA comprises a transceiver configured for broadcast TWT operation on multi-link operation (MLO) links with corresponding APs of an AP MLD. The processor is operably coupled to the transceivers, and configured to negotiate a broadcast TWT schedule over a first link between a first STA and a first AP of the AP MLD, apply the broadcast TWT schedule to the group of links, negotiate a restricted TWT schedule with the AP MLD over at least one link of the group of links, and establish the restricted TWT schedule on one or more links of the at least one link.

Abstract: A non-access point (AP) MLD comprises STAs, each comprising a transceiver that forms a link with a corresponding AP of an AP MLD, and a processor. A restricted TWT (R-TWT) schedule is established on a first link, and a first STA on that link is a member of an R-TWT service period (SP) on that link. A second STA on a second link is not a member of any R-TWT SP on that link that overlaps with the R-TWT SP on the first link. The processor transitions the non-AP MLD into EMLSR operation wherein the first and second links form an EMLSR link pair, determines that a transmission opportunity (TXOP) has begun on the second link, and coordinates between the STAs such that a frame exchange sequence with the AP MLD on the second link during the TXOP does not overlap with the R-TWT SP on the first link.

Abstract: Methods and apparatuses for facilitating avoidance of NSTR constraint violation caused by TDLS channel switching and link enablement in multi-link operation (MLO) in a wireless local area network. The methods include determining to switch a frequency channel used by a first tunneled direct link setup (TDLS) direct link from a first frequency channel to a second frequency channel, wherein the TDLS direct link is formed between a station (STA) of a non-access point (AP) multi-link device (MLD) and a corresponding peer STA, generating a TDLS channel switch notification message that includes an indication that the first TDLS direct link is switching from the first to the second frequency channel, and transmitting, to an AP MLD with which the non-AP MLD is associated, on an MLO link, the TDLS channel switch notification message, wherein MLO links are formed between STAs of the non-AP MLD and APs of the AP MLD.

Abstract: Embodiments of the present disclosure provide methods and apparatuses for facilitating restricted target wake time (TWT) operation in a wireless local area network. The apparatuses include a non-access point (AP) multi-link device (MLD) comprising a plurality of stations (STAs) and a processor. Each STA comprises a transceiver configured for broadcast TWT operation on multi-link operation (MLO) links with corresponding APs of an AP MLD. The processor is operably coupled to the transceivers, and configured to negotiate a broadcast TWT schedule over a first link between a first STA and a first AP of the AP MLD, apply the broadcast TWT schedule to the group of links, negotiate a restricted TWT schedule with the AP MLD over at least one link of the group of links, and establish the restricted TWT schedule on one or more links of the at least one link.

Abstract: Apparatuses and methods for precoding matrix indicator (PMI)-based data beam nulling with a channel state information (CSI) report. An apparatus includes a transceiver configured to communicate via a wired or wireless communication medium and a processor coupled to the transceiver. The processor is configured to identify restricted PMI beams in a nulling direction for supported ranks; receive, via the transceiver from a user equipment (UE), a CSI report including a rank, a PMI, and channel quality indicator (CQI) feedback; and determine whether the reported PMI is restricted. The processor is further configured to select an alternative PMI among a number of unrestricted PMIs for the reported rank; boost a reported CQI if a reduced transmit power is configured; and select a modulation coding scheme (MCS) and generate a precoder for a data beam based on at least one of: the CSI report, the alternative PMI, and the boosted CQI.

Abstract: Methods and apparatuses for supporting buffered group-addressed management frame indication are provided. A method of wireless communication performed by a non-access point (AP) multi-link device (MLD) comprises: receiving, from an AP of an AP MLD, a delivery traffic indication message (DTIM) beacon, the DTIM beacon comprising a traffic indication map (TIM) element; determining, based on the TIM element, whether group-addressed management frames are buffered at one or more other APs of the AP MLD; and prioritizing reception of one or more other DTIM beacons associated with the one or more other APs of the AP MLD based on whether the group-addressed management frames are buffered at the one or more other APs of the AP MLD.

Abstract: Methods and apparatuses for enabling reuse, by a node in a basic service set (BSS), of a channel medium that is in use by devices of an overlapping BSS (OBSS) in a wireless local area network. A method of wireless communication performed by a first node includes the steps of obtaining, based on transmissions from other nodes in at least one of a BSS or an OBSS, network context information for a network environment around the first node, updating an OBSS packet detection (PD) threshold for spatial reuse (SR) based on the network context information, and performing, for a transmission to one of the other nodes in the BSS, an SR clear channel assessment (CCA) using the updated OBSS PD threshold for detection of packets transmitted by the nodes in the OBSS.

Abstract: Methods and apparatuses for facilitating mobile AP MLD operation. A method comprises determining whether a second AP operating on a non-primary link forms an NSTR link pair with a first AP operating on a primary link; determining whether a second STA operating on the non-primary link forms an NSTR pair with a first STA operating on the primary link; transmitting frames on the non-primary link without synchronizing PPDUs with a frame transmission on the primary link when: the second AP does not form the NSTR link pair with the first AP, and the second STA does not form the NSTR pair with the first STA; and transmitting frames on the non-primary link by synchronizing the PPDUs with the frame transmission on the primary link when: the second AP forms the NSTR link pair with the first AP, or the second STA forms the NSTR pair with the first STA.

Abstract: Methods and apparatuses for facilitating the indication of links of a multi-link device (MLD) that are configured for enhanced multi-link multi-radio (EMLMR) operation in a wireless local area network (WLAN). A non-access point (AP) MLD comprises STAs, each comprising a transceiver configured to form a link with a corresponding AP of an AP MLD, and a processor operably coupled to the STAs. At least a subset of the links are EMLMR links configured to operate in an EMLMR mode of operation. The processor is configured to generate a message including an indication that the subset of the links are EMLMR links. At least one of the transceivers is further configured to transmit, to the AP MLD, the message before an EMLMR frame exchange.

Abstract: Methods and apparatuses for facilitating, in multi-link devices (MLDs) that are capable of exchanging an Aggregated MAC Protocol Data Unit (A-MPDU), simultaneous transmission of the A-MPDU and retransmission of failed MPDUs of the A-MPDU. A non-access point (AP) MLD comprises STAs, each comprising a transceiver configured to form a link with a corresponding AP of an AP MLD, and a processor. A first transceiver is configured to receive, from the AP MLD on a first of the links, an A-MPDU comprised of multiple MPDUs. the processor is configured to detect, during reception of the A-MPDU, that at least one of the MPDUs has not been received. A second transceiver is configured to transmit, to the AP MLD on a second of the links, a request to retransmit the at least one MPDU on the second link before reception of the A-MPDU on the first link is complete.

Abstract: A user equipment (UE) in a wireless communication system includes a transceiver and a processor. The transceiver receives information about an antenna system of a base station. The information includes a number of collocated antenna groups, and a number of antenna modules for each type of antenna modules in each of the collocated antenna groups. A collocated antenna group has at least two types of antenna modules: a first module with first antenna type and a second module with second antenna type. The transceiver also receives configuration information for a channel state information-reference signal (CSI-RS) resource. The transceiver also receives a CSI-RS based on the configuration information and acquires measurements. The processor determines a subset of antenna modules based on a comparison between the measurements and a criterion. The processor generates CSI for the subset of antenna modules. The transceiver transmits a CSI report comprising the CSI.

Abstract: Methods and apparatuses for enabling triggered transmission opportunity (TXOP) sharing for peer-to-peer (P2P) communication during a target wake time (TWT) service period (SP) in a wireless local area network. A wireless station (STA) device comprises a transceiver and a processor operably coupled to the transceiver. The transceiver is configured to receive, from an access point (AP), a trigger frame during a TWT SP that corresponds to a trigger-enabled TWT schedule that is configured such that the trigger frame includes an indication that the trigger frame is for a triggered TXOP sharing (TXS) mode that allows P2P communication during the TWT SP. The processor is configured to, based on receipt of the trigger frame, begin a P2P session with a peer STA during the TWT SP.

Abstract: Methods and apparatuses for facilitating a primary link change procedure for mobile AP MLD are provided. A method for wireless communication performed by an access point (AP) multi-link device (MLD), the AP MLD comprising APs forming a mobile AP MLD, the method comprising: forming links with corresponding stations (STAs) associated with a non-AP MLD; instructing the APs to form a first link and a second link with the corresponding STAs; designating the first link as a primary link and the second link as a non-primary link; determining that the primary link is experiencing degradation; and in response to determining that the primary link is experiencing degradation, effecting a change in the primary link designation, or implementing a channel change procedure to change a channel within the primary link.

Abstract: Methods and apparatuses for facilitating the coexistence of target wake time (TWT) and enhanced multi-link single radio EMLSR operations for multi-link devices (MLDs). A non-access point (AP) MLD comprises STAs, each comprising a transceiver configured to form a link with a corresponding AP of an AP MLD, and a processor. At least a subset of the links are EMLSR links. TWT schedules are established for communications on at least two of the EMLSR links, each having a TWT service period (SP). The processor is configured to determine whether there is an overlap between a first of the TWT SPs that corresponds to a first of the EMLSR links and other TWT SPs that correspond to other EMLSR links, based on the overlap existing, prioritize the first EMLSR link based on criteria related to each of the TWT schedules, and initiate a frame exchange on the prioritized EMLSR link.

Abstract: A method includes obtaining one or more channel quality and performance indicators of a user equipment (UE) from multiple transmit-receive points (TRPs) in a coordinated multipoint (CoMP) cluster. The method also includes generating a set of performance metrics from the one or more channel quality and performance indicators. The method also includes determining a number of helping layers for multiplexing joint transmission (Mux-JT) in the CoMP cluster based on the set of performance metrics. The method also includes selecting a modulation and coding scheme (MCS) for the Mux-JT based on at least one channel quality indicator (CQI) of the UE.

Abstract: Methods and apparatuses for facilitating the reception of group-addressed frames by multi-link devices (MLDs). A non-access point (AP) MLD comprises STAs, each comprising a transceiver configured to form a link with a corresponding AP of an AP MLD, and a processor. Each link has an associated predetermined time at which a group-addressed frame is expected to be received on the link, and a subset of the links are constrained links configured to operate in a constrained mode of operation. The processor is configured to, while the constrained links are operating in an active listening state in the constrained mode, determine to listen for the group-addressed frame on a first of the constrained links at the associated predetermined time, and after reception of the group-addressed frame on the first constrained link, return to listening on all of the constrained links in the constrained mode.