Abstract: Methods, systems, and apparatuses are provided for transmission in access procedures in a wireless communication system, wherein a method of a first device comprises receiving a first message, from a reader, for initiating a random access procedure, performing a first Device-to-Reader (D2R) transmission for Message 1 (Msg1), to the reader, for the random access procedure, wherein the first D2R transmission for Msg1 comprises a first Identity (ID), receiving a Message 2 (Msg2) message including multiple IDs, wherein the multiple IDs comprise at least the first ID, and wherein the Msg2 message includes a single size indication associated with the multiple IDs, deriving or determining a data packet size based on the single size indication in the Msg2 message; and performing a second D2R transmission in response to the Msg2 message, wherein the second D2R transmission comprises a data packet with the data packet size.

Abstract: Methods, systems, and apparatuses are provided for resource utilization of access procedures in a wireless communication system, wherein a method for a first device comprises receiving a first Reader-to-Device (R2D) message for paging at least the first device, transmitting a first Device-to-Reader (D2R) message based on a first frequency shift, wherein the first D2R message comprises a first Identification (ID) generated by the first device, receiving a second R2D message indicating a set of IDs comprising at least the first ID, and transmitting a second D2R message based on a second frequency shift when the second R2D message indicates information associated with a set of frequency shifts, wherein the second frequency shift is determined, among the set of frequency shifts, based on at least an order of the first ID among the set of IDs.

Abstract: Methods, systems, and apparatuses are provided for handling Ambient Internet-of-Things (IoT) unsuccessful transmissions in a wireless communication system, wherein a method for a reader comprises transmitting a paging message triggering at least a first device to perform a random access procedure, receiving, from the first device, at least a first Msg1 transmission of the random access procedure, wherein the first Msg1 transmission includes an Identification (ID) associated with the first device, transmitting a first Msg2, of the random access procedure, including at least the ID, wherein the first Msg2 comprises at least a first scheduling information for a first Msg3 transmission, of the random access procedure, to be transmitted by the first device, transmitting a second Msg2, of the random access procedure, including at least the ID in response to failing to receive or decode at least the first Msg3 transmission, and receiving, in response to transmitting the second Msg2, at least the second Msg3 transmis

Abstract: Methods, systems, and apparatuses are provided for resource acquisition and operation of intermediate nodes in a wireless communication system, wherein a method for a User Equipment (UE) capable of acting or operating as an ambient Internet-of-Things (IoT) intermediate node in a wireless communication system comprises transmitting or providing one or more information in a first signaling, used to request resources for an (ambient IoT) intermediate node-related operation or an ambient IoT-related operation or procedure, to a network node, receiving one or more downlink signalings from the network node, determining a set of resources based on the one or more downlink signalings, and performing the (ambient IoT) intermediate node-related operation or the ambient IoT-related operation or procedure, via the set of resources, with one or more ambient IoT devices.

Abstract: Methods, systems, and apparatuses are provided for sidelink transmission in unlicensed spectrum in a wireless communication system, wherein a method comprises receiving a configuration for configuring a first sidelink resource pool, triggering or requesting sensing-based resource selection or re-selection for performing one or more sidelink transmissions in the first sidelink resource pool, wherein one parameter is provided or determined or used to indicate a second number of consecutive Transmission Time Intervals (TTIs) being larger than one, determining a set of candidate resources, comprising: determining a first number of candidate resources in a resource selection window, wherein the first number of candidate resources comprises only candidate resources where each candidate resource starts in a TTI associated with the first sidelink resource pool and has the second number of consecutive TTIs in the first sidelink resource pool, and the second number of consecutive TTIs are consecutive in physical TTIs.

Abstract: Methods, systems, and apparatuses are provided for handling frequency resources in access procedures in a wireless communication system, wherein a method of a first device comprises monitoring or receiving a first Reader-to-Device (R2D) transmission, comprising a first message for triggering a random access procedure, in a first R2D frequency resource, wherein the first message indicates multiple Device-to-Reader (D2R) frequency resources, determining a first D2R frequency resource from the multiple D2R frequency resources, performing a first D2R transmission on the (determined) first D2R frequency resource, and monitoring a second R2D transmission for a response in a second R2D frequency resource in response to (performing) the first D2R transmission, wherein the second R2D frequency resource is overlapped with the first R2D frequency resource in frequency domain.

Abstract: Methods, systems, and apparatuses are provided for providing information of Ambient Internet of Things (IoT) devices in a wireless communication system, wherein a method of a User Equipment (UE) comprises receiving a first signaling of triggering a random access procedure, triggering the random access procedure in response to receiving the first signaling, performing a first transmission during the random access procedure, and providing, in the first transmission, an energy information indicating at least one of: whether remaining energy of the UE is sufficient or not for one or more following transmissions or receptions after the first transmission, the remaining energy of the UE is insufficient for the one or more following transmissions or receptions after the first transmission, whether the remaining energy of the UE is sufficient or not to complete the random access procedure, and/or the remaining energy of the UE is insufficient to complete the random access procedure.

Abstract: Methods, systems, and apparatuses are provided for handling uplink resources configuration and selection for ambient Internet of Things (IoT) devices in a wireless communication system, wherein a method of a User Equipment (UE) comprises receiving a paging for ambient IoT indicating at least one or more Identifications (IDs) of multiple UEs comprising an ID of the UE and at least one configuration related to multiple contention-free radio resources, selecting, in response to receiving the paging, a first radio resource from the multiple contention-free radio resources, and performing a first transmission using the first radio resource.

Abstract: Methods, systems, and apparatuses are provided for transmission of sidelink reference signals and sidelink data in a wireless communication system, wherein a method of a first device comprises receiving a first configuration of a first sidelink resource pool shared for sidelink data transmission and sidelink reference signal, receiving a second configuration of a first parameter of a maximum number of sidelink data transmissions in the first sidelink resource pool, selecting a first number for sidelink data retransmissions and also for sidelink reference signal transmissions based on the first parameter, selecting one or more first sidelink resources, in the first sidelink resource pool, according to at least the first number, and performing at least a first sidelink data retransmission for a sidelink data packet and a first sidelink reference signal transmission on a first sidelink resource of the one or more first sidelink resources.

Abstract: A method and apparatus are disclosed from the perspective of a first device. In one embodiment, the method includes the first device performs sensing on a data resource pool, and the first device selects/derives at least a first data resource from the data resource pool based on the sensing result of the data resource pool. The method further includes the first device transmits a first control information on a first control resource, wherein the first control information allocates or indicates the first data resource. The method also includes the first device performs a first data transmission on the first data resource to at least one second device.

Abstract: Methods, systems, and apparatuses are provided for channel monitoring in a wireless communication system, wherein a method of a User Equipment (UE) comprises receiving a first signaling of triggering a random access procedure, triggering the random access procedure, in response to (receiving) the first signaling, transmitting a first transmission during the random access procedure, determining a third timing based on at least a first timing and a first time delay, wherein the first timing is an end of the first signaling, and monitoring a second transmission starting from the third timing, in response to transmitting the first transmission.

Abstract: Methods, systems, and apparatuses are provided for initiating random access for ambient Internet of Things (IoT) in a wireless communication system, wherein a method of a User Equipment (UE) comprises receiving a first signaling of or for triggering a first random access procedure, and determining, in response to receiving the first signaling, whether to trigger the first random access procedure or not based on a first condition, wherein the first condition includes at least one of: whether a timer is running or not, and/or whether a first time duration has elapsed or not.

Abstract: Methods, systems, and apparatuses are provided for handling configurations for ambient Internet of Things (IoT) in a wireless communication system, wherein a method of a User Equipment (UE)/device comprises receiving a first signaling of triggering a random access procedure, wherein the first signaling is for more than one UE/device, and triggering, in response to receiving the first signaling, the random access procedure and performing a first transmission of the random access procedure based on a first resource or a first configuration provided in the first signaling.

Abstract: Methods, systems, and apparatuses are provided for providing assistance information of ambient Internet of Things (IoT) in a wireless communication system, wherein a method of a User Equipment (UE) comprises receiving a first signaling of triggering a random access procedure, wherein the first signaling indicates a first information associated with a specific device type of device types, and determining whether to trigger the random access procedure, in response to receiving the first signaling, based on at least whether the UE belongs to the specific device type associated with the first information.

Abstract: A method and apparatus are disclosed from the perspective of a first device to perform sidelink communication. In one embodiment, the first device has a periodic sidelink resource reservation, wherein the periodic sidelink resource reservation comprises, reserves, or provides one set of sidelink resources in one period. The first device also has one or more sidelink logical channels with available sidelink data, wherein the one or more sidelink logical channels are associated with one or more destinations. Furthermore, the first device selects or determines a first destination, among the one or more destinations, satisfying at least a condition that an initial sidelink resource of the one set of sidelink resources is within sidelink active time associated with the first destination. In addition, the first device generates a first data packet for the first destination.

Abstract: Methods, systems, and apparatuses are provided for latency handling of sidelink reference signal transmission in a wireless communication system, wherein a method comprises receiving or having a configuration of a first sidelink resource pool for sidelink data transmission and sidelink reference signal transmission, performing a first sensing-based resource selection, triggered or requested in a first timing, for selecting one or more first sidelink resources in the first sidelink resource pool, determining a first set of candidate resources within a first time interval, determining a first subset of candidate resources after excluding some candidate resources from the first set of candidate resources based on one or more sensing results, selecting the one or more first sidelink resources from the first subset of candidate resources according to at least a second remaining packet delay budget and a remaining delay budget associated with a first sidelink reference signal, and performing a first sidelink data t

Abstract: A method and apparatus are disclosed from the perspective of a first device to perform sidelink communication. In one embodiment, the first device sends or reports a resource set to a second device, wherein the resource set comprises one or more sidelink resources in one or more slots in a carrier or cell. Furthermore, when the first device performs sidelink resource (re-)selection procedure for selecting a first sidelink resource in the carrier or cell, the first device prevents or precludes from selecting or determining (any) sidelink resources in the one or more slot in the carrier or cell for selecting the first sidelink resource.

Abstract: A method and apparatus are disclosed from the perspective of a first device to perform sidelink communication. In one embodiment, the method includes the first device performing sidelink resource selection or reselection procedure for a sidelink transmission to a second device, wherein the sidelink resource selection or reselection procedure is performed to select at least one sidelink resource from candidate sidelink resources within a time duration of selection window. The method further includes the first device selecting a first sidelink resource based on sidelink active time or wake-up time of the second device, wherein the first sidelink resource is within the time duration of selection window. The method also includes the first device performing the sidelink transmission on the first sidelink resource to the second device.

Abstract: Methods, systems, and apparatuses are provided for resource determination of sidelink reference signals in a wireless communication system, wherein a method of a first device comprises receiving a configuration of a first sidelink resource pool from a network for sidelink data transmission and/or sidelink reference signal, determining a first sidelink reference signal resource Identity (ID), multiplexing a first sidelink reference signal transmission and a first sidelink data transmission in a first slot, determining a second sidelink reference signal resource ID, and multiplexing a second sidelink reference signal transmission and a second sidelink data transmission in a second slot.

Abstract: Methods, systems, and apparatuses are provided for handling multiplexing of sidelink reference signals in a wireless communication system, wherein a method of a first device comprises receiving a configuration of a first sidelink resource pool for sidelink data transmission and/or sidelink reference signal, performing an initial sidelink data transmission for transmitting a sidelink data packet, and performing a first sidelink data retransmission, for transmitting the sidelink data packet, with multiplexing a first sidelink reference signal transmission, wherein the first sidelink reference signal transmission is available or triggered after the initial sidelink data transmission.