Network node, user equipment, and methods in a wireless communications network

A method performed by a User Equipment, UE, for assisting a network node in locating the UE, wherein the UE, at least one portable network node and the network node operate in a wireless communication network, the method comprising:

• receiving broadcasted reference signals from the at least one portable network node, triggering the UE to measure and report to the network node a quality of the reference signals broadcasted by the respective at least one portable network node,
• receiving a configuration from the network node, the configuration comprising an indication to report a physical cell identity (PCI) associated with each of the one or more broadcasted reference signals, wherein the PCI changes dynamically,
• subsequently measuring the quality of the respective reference signals, and
• for each of the respective at least one portable network node, sending respective subsequent measurement reports to the network node, wherein each measurement report comprises a current quality value of its reference signals, and
• which subsequent measurement reports assists the network node to command each of the respective at least one portable network node to move in a direction such that quality values of its corresponding reference signals in the subsequent measurement reports are increasing.

A network node for locating a User Equipment, UE, wherein the network node, at least one portable network node and the UE are operable in a wireless communication network, the network node being configured to:

• configure the at least one portable network node to broadcast reference signals, triggering the UE to subsequently measure and report a quality of the respective broadcast reference signals to the network node,
• receive subsequent measurement reports from the UE, wherein each measurement report comprises a current quality value of the reference signals sent by the respective at least one portable network node, and
• manage the respective at least one portable network node to approach the position of the UE by:
• meanwhile analysing the subsequent measurement reports, command each of the at least one portable network node to move in a direction that is decided based on the analysis of its corresponding subsequent measurement reports one by one upon receiving them, which moving direction is adapted to be to be performed such that quality values of its corresponding reference signals in subsequent measurement reports are increasing.

A User Equipment, UE, for assisting a network node in locating the UE, wherein the UE, at least one portable network node and the network node are operable in a wireless communication network, the UE being configured to:

• receive broadcasted reference signals from the at least one portable network node, triggering the UE to measure and report to the network node a quality of the reference signals broadcast by the respective at least one portable network node,
• receive a configuration from the network node, the configuration comprising an indication to report a physical cell identity (PCI) associated with each of the one or more broadcasted reference signals, wherein the PCI changes dynamically,
• subsequently measure the quality of the respective reference signals, and
• for each of the respective at least one portable network node, send respective subsequent measurement reports to the network node, wherein each measurement report is adapted to comprise a current quality value of its reference signals, and
• which subsequent measurement reports are adapted to assist the network node to command each of the respective at least one portable network node to move in a direction such that quality values of its corresponding reference signals in the subsequent measurement reports are increasing.