Abstract: A method, system and apparatus are disclosed for monitoring procedures for sidelink (SL) relay scenarios. A node determines an occurrence of at least one event associated with the relay path, the relay path including the node and the second node, and the at least one event including at least one of a warning event and a failure event for the relay path; and as a result of the determination, initiate performance of at least one action associated with the at least one of the warning event and the failure event.

Abstract: A technique for performing direct discovery between a first radio device (100-RD) and a second radio device (100-RD) according to a proximity service of a radio access technology, RAT, is described. The proximity service comprises at least two different models of the direct discovery. As to a method aspect of the technique, the direct discovery is performed according to one of the at least two different models.

Abstract: A technique for handling a radio link failure, RLF, in a relayed radio communication relayed through a relay radio device (100-RL) between a remote radio device (100-RM) and a radio access network, RAN (100-NN), or a further remote radio device (100-RM) is described. An RLF in the relayed radio communication is determined. Responsive to the determined RLF, at least one of a release, a reconfiguration, and a reestablishment of the relayed radio communication is performed or initiated.

Abstract: Various embodiments of the present disclosure provide a method for path switch. The method which may be performed by a terminal device comprises performing transmission with a first node on a first path. In accordance with an exemplary embodiment, the method further comprises switching from the first path to a second path to perform transmission with a second node on the second path. During the switching of the terminal device, one or more pending packets of the terminal device on the first path may be forwarded to the second path. In accordance with an exemplary embodiment, the first node and the second node may be served by a base station. In accordance with another exemplary embodiment, the first node and the second node may be served by different base stations.

Abstract: Various embodiments of the present disclosure provide a method for direct device-to-device communication. The method which may be performed by a first terminal device comprises receiving a message for connection establishment from a second terminal device. The message includes capability information about relaying for direct device-to-device communication. The method further comprises determining whether to transmit the message to a third terminal device, based at least in part on the capability information. According to various embodiments of the present disclosure, the relaying for direct device-to-device communication, e.g., layer-2/layer-3 based relaying, may be configured and/or enabled efficiently and flexibly.

Abstract: The present disclosure provides a method in a first terminal device. The method includes transmitting, to a second terminal device, a first message for initiating a discovery procedure over a sidelink. The first message contains one or more of following information associated with the first terminal device: first application or traffic related information, first location or mobility related information, or first connectivity related information.

Abstract: According to an aspect, a wireless device is configured to selectively operate in one of two or more previously configured bandwidth parts (BWPs), each BWP being a different subset of an available bandwidth for uplink and/or downlink operation. The wireless device switches from an active RRC state to an inactive RRC state, and, after the switching, retains a physical layer configuration corresponding to the BWP active just prior to the switching.

Abstract: Methods and apparatus supportive to D2D communications are disclosed. A method performed by a relay user equipment, relay UE, comprises: monitoring a data traffic volume at the relay UE; and determining a size of a first portion of the data traffic volume related to the relay UE, and a size of a second portion of the data traffic volume related to a remote UE that is connected to the relay UE.

Abstract: A technique for protecting and validating header integrity in a relayed radio communication is described. As to a method aspect of the technique, integrity of a header of a data unit, DU, is protected at an adaptation layer for a relayed radio communication between a remote radio device (100-RM) and a radio access network, RAN (100-NN), or a further radio device (100-RM), through a relay radio device (100- RL). A DU is obtained at a transmitter, TX, from a transparent layer, wherein the relayed radio communication uses a protocol stack comprising the adaptation layer below the transparent layer that is relayed transparently at the relay radio device (100-RL). The integrity of the header of the DU is protected at the adaptation layer of the TX by including a token in the header of the DU at the adaptation layer, the token comprising a local temporary identifier, ID, of the remote radio device (100-RM), wherein the integrity-protected header is attached to the DU obtained from the transparent layer.

Abstract: A wireless communication device (10) determines that a further wireless communication device (10) is configured to switch between an inactive reception state and an active reception state. Based on when the further wireless communication device (10) will be in the active reception state, the wireless communication device (10) determines a candidate set of radio resources. From the candidate set of radio resources, the wireless communication device (10) selects at least one radio resource for a D2D transmission from the wireless communication device (10) to the further wireless communication device (10).

Abstract: The present disclosure provides a method in a first terminal device. The method includes: receiving, from a second terminal device serving as a relay between the first terminal device and a network node, system information related to sidelink communication between the first terminal device and the second terminal device.

Abstract: Disclosed is a technique for informing a network node, NN, of a network about at least one sidelink-related radio access capability of a remote communication unit, RMCU, to enable configuring a relay path between the RMCU and the NN via a relay communication unit, RLCU, connected to the NN. The RMCU transmits, to the RLCU, first capability information indicative of the at least one sidelink-related radio access capability of the RMCU so as to configure the RLCU for transmission of the first capability information to the NN. The RLCU receives, from the RMCU, the first capability information and transmits the first capability information to the NN. The NN receives the first capability information from the RLCU.

Abstract: A wireless communication device (10) simultaneously maintains a first DRX configuration for D2D communication and a second DRX configuration for D2D communication. Based on at least one of the first DRX configuration and the second DRX configuration, the wireless communication device (10) participates in D2D communication with one or more further wireless communication devices (10).

Abstract: Methods and apparatuses for resource allocation to a terminal device. In a method a first terminal device connects to a network via a second terminal device acting as a relay therebetween. The first terminal device transmits, to the second terminal device, a report message comprising at least information related to a volume of data from the first terminal device to the second terminal device.

Abstract: Systems and methods of the present disclosure are directed to a method performed by a User Equipment (UE) for context management in a sidelink relay scenario. The method includes initiating a Radio Access Network (RAN) Notification Area (RNA) update with a managing network node. The method includes sending UE identities for a sidelink relay to the managing network node. The UE identities comprises both a Remote (RM) UE identity of a RM UE in the sidelink relay and a Relay (RL) UE identity of a RL UE in the sidelink relay. The UE is either the RM UE or the RL UE.

Abstract: A wireless communication device and a method performed by the device, enabled to perform a Dual Active Protocol Stack handover (HO) from a source node/cell to a target node/cell is provided. Responsive to detecting a radio link failure, RLF, on a source link between the device and the source node/cell, a RLF report related to the source node/cell is generated. Responsive to detecting a RLF on a target link between the device and the target node/cell, a RLF report related to the target node/cell is generated. An indication is included on a subsequent uplink RRC message to a network node that the device has one or more RLF reports related to DAPS HO failure. Responsive to receiving a request from the network node to send the one or more RLF reports, the one or more RLF reports are transmitted to the node.

Abstract: Embodiments described herein relate to methods and apparatuses for providing communication between a remote device and a destination node over a relay path comprising at least one relay device. A method comprises obtaining an indication that a quality of service, QoS, metric is not meeting a QoS requirement, wherein the QoS metric is associated with one of: a traffic flow between the remote device and the destination node, a radio bearer used in communication between the remote device and the destination node; and a logical channel used in communication between the remote device and the destination node; and responsive to the indication, initiating a recovery action to improve a QoS of the communication between the remote device and the destination node.

Abstract: In one aspect, there is provided a method performed by a terminal device. The terminal device has a first connection with a serving base station using a first radio-access technology, and a second connection with one or more nodes using a second radio-access technology. The method comprises: receiving, from the serving base station over the first connection, a connection configuration message, the connection configuration message comprising configuration information for the second connection; and, responsive to successful implementation of the configuration information for the second connection, transmitting a first response message to the serving base station over the first connection, the first response message comprising an indication that the configuration information was successfully implemented.

Abstract: A method (400) for reporting radio link failure, RLF, information. The method includes a user equipment, UE, detecting (s402) an RLF with respect to a master cell group, MCG. The method also includes, in response to detecting the RLF with respect to the MCG, the UE storing (s404) RLF information. The method also includes the UE sending (s406) a first message comprising MCG failure information, e.g., the RLF information, and activating a timer. The method also includes the UE receiving (s408) a second message after sending the first message and activating the timer. The method also includes the UE, in response to receiving the second message, determining (s410) that a condition is satisfied, wherein determining that the condition is satisfied comprises at least determining that the timer is still running. The method also includes, as a result of determining that the condition is satisfied, the UE deleting (s412) the RLF information.

Abstract: Methods and apparatus are provided to enable on-demand requests for a time reference for time-sensitive communications (TSC). The network can optionally configure a UE to enable on-demand requests for TSC. When the UE needs a time reference for TSC, the UE sends a message to the network including an explicit indication that a time reference for TSC is needed by the UE. In response to the request, the network sends to the UE on-demand system information comprising the time reference in a broadcast message or a dedicated message.