Methods, architectures, apparatuses and systems for extended reality-assisted radio resource management
Extended Reality (XR) applications may require high throughput and very low latency. New Radio (NR) Wireless receiver/transmitter units (WTRUs) running XR applications (XR-WTRUs) may be confronted with link failures when these applications are used in dense urban or indoor environments because of these devices operating in the millimeter band. Methods and devices are provided therefore for performing cell selection and beam management proactively to avoid link failure due to objects being in line of sight between the XR-WTRU and a network node with which it has established a connection. XR-WTRUs may therefore perform visual sensing that may enable visualizing current and future radio environment and using this information to prevent link failures by handing the XR-WTRU over to an alternative network node in line of sight of the XR-WTRU before the XR-WTRU is no longer in line of sight of the network node with which it has established a connection.
1 . A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:
receiving Radio Resource Management (RRM) configuration comprising information from a serving network node comprising at least one RRM event related to expected radio-frequency (RF) propagation loss between the WTRU and the serving network node caused by an object obstructing an in line-of-sight (LOS) path between the WTRU and the serving network node, and comprising information related to at least one candidate target network node, and for each of the at least one candidate target network node, information related to detection, by an optical device of the WTRU, of an optically detectable object associated with the at least one candidate target network node;
detecting RF propagation loss between the WTRU and the serving network node, determining, based on the information from the serving network node, occurrence of an RRM event, and determining, using the optical device of the WTRU and based on the information related to at least one candidate target network node and the information related to detection of an optically detectable object per the at least one candidate target network node, a correspondence between an optically detectable object in LOS of the WTRU and a candidate target network node from the at least one candidate target network node, and performing RF measurements relative to the candidate target network node; and
transmitting a report to the serving network node, the report comprising at least some of the information related to the candidate target network node, and information related to the RF measurements relative to the candidate target network node.
2 . The method of claim 1 , wherein the optical device comprises at least one of: a camera; a lidar; and an infra-red sensor.
3 . The method of claim 1 , wherein the report further comprises any of:
location information of the object obstructing the LOS path between the WTRU and the serving network node;
at least one physical attribute of the object obstructing the LOS path between the WTRU and the serving network node; and
an estimated time related to a blockage of communication between the WTRU and the serving network node by the object obstructing the LOS path between the WTRU and the serving network node.
4 . The method of claim 1 , wherein the RRM configuration information further comprises a measurement object related to estimation by the WTRU of a remaining time prior to the expected RF propagation loss between the WTRU and the serving network node, the WTRU performing the estimation and including the estimation in the report.
5 . The method of claim 1 , wherein the correspondence between the optically detectable object in LOS of the WTRU and a candidate network node is determined based on capturing image frames using the optical device of the WTRU and matching information comprised in the captured image frames with the information related to detection of the optically detectable object.
6 . The method of claim 1 , wherein the information related to the detection of the optically detectable object associated with the candidate target network node is an image of the optically detectable object.
7 . The method of claim 1 , wherein the RF measurements relative to the candidate target network node comprise at least one of:
channel feedback information related to accessible beams relative to the candidate target network node; and
channel state information reference signal related to accessible beams relative to the candidate target network node.
8 . A wireless transmit/receive unit (WTRU), comprising:
at least one processor; and
a transceiver operably coupled to the at least one processor, the at least one processor and transceiver being configured to:
receive Radio Resource Management (RRM) configuration comprising information from a serving network node comprising at least one RRM event related to expected radio-frequency (RF) propagation loss between the WTRU and the serving network node caused by an object obstructing an in line-of-sight (LOS) path between the WTRU and the serving network node, and comprising information related to at least one candidate target network node, and for each of the at least one candidate target network node, information related to detection, by an optical device of the WTRU, of an optically detectable object associated with the at least one candidate target network node;
detect RF propagation loss between the WTRU and the serving network node, determine, based on the information from the serving network node, occurrence of an RRM event, and determine, using the optical device of the WTRU and based on the information related to at least one candidate target network node and the information related to detection of an optically detectable object per the at least one candidate target network node, a correspondence between an optically detectable object in LOS of the WTRU and a candidate target network node from the at least one candidate target network node, and perform (RF) measurements relative to the candidate target network node; and
transmit a report to the serving network node, the report comprising at least some of the information related to the candidate target network node, and information related to the RF measurements relative to the candidate target network node.
9 . The WTRU of claim 8 , wherein the optical device comprises at least one of: a camera; a lidar; and an infra-red sensor.
10 . The WTRU of claim 8 , wherein the at least one processor is configured to include, in the report, any of:
location information of the object obstructing the LOS path between the WTRU and the serving network node;
at least one physical attribute of the object obstructing the LOS path between the WTRU and the serving network node; and
an estimated time related to a blockage of communication between the WTRU and the serving network node by the object obstructing the LOS path between the WTRU and the serving network node.
11 . The WTRU of claim 8 , wherein the RRM configuration information further comprises a measurement object related to estimation by the WTRU of a remaining time prior to the expected RF propagation loss between the WTRU and the serving network node, the at least one processor being further configured to perform the estimation and to include the estimation in the report.
12 . The WTRU of claim 8 , wherein the at least one processor is configured to determine the correspondence between the optically detectable object in LOS of the WTRU based on capturing image frames using the optical camera device of the WTRU and matching information comprised in the captured image frames with the information related to detection of the optically detectable object.
13 . The WTRU of claim 8 , wherein the information related to the detection of an optically detectable object associated with the candidate target network node is an image of the optically detectable object.