Client device and network node for switching positioning procedures
Embodiments of this disclosure provide for a method and related device for switching between a first and a second positioning procedure. The first positioning procedure may be an absolute positioning procedure and the second positioning may be a relative positioning procedure. The switch may be initiated by a network node which can instruct a client device to terminate the first positioning procedure and to activate the second positioning procedure or to instruct the client device to continue with the first positioning procedure and to activate the second positioning procedure. In this way, the positioning procedure used by the client device is adaptable based on dynamic requirements on positioning procedures set by applications.
1 . A client device for a communication system, the client device comprising at least one processor and being configured to:
activate a first positioning procedure;
receive a first control message from a network node, wherein the first control message indicates an instruction to activate a second positioning procedure,
wherein the first positioning procedure provides an absolute position of the client device and the second positioning procedure provides a relative position of the client device, or the first positioning procedure provides a relative position of the client device and the second positioning procedure provides an absolute position of the client device,
wherein a second control message, indicating a request to activate the second positioning procedure, is transmitted to the network node prior to the reception of the first control message; and
activate the second positioning procedure upon reception of the first control message.
2 . The client device according to claim 1 , wherein the first control message further indicates an instruction to:
de-activate the first positioning procedure, or
continue having the first positioning procedure be active.
3 . The client device according to claim 1 , wherein the absolute position defines a position of the client device in a coordinate system and the relative position defines a spatial relationship between the client device and one or more objects.
4 . The client device according to claim 1 , wherein the first positioning procedure is an absolute positioning procedure based on Uu measurements and the second positioning procedure is a relative positioning procedure based on sidelink measurements.
5 . The client device according to claim 1 , wherein the network node is a Location Management Function, and wherein the first control message is a long term evolution (LTE) positioning protocol (LPP) message.
6 . The client device according to claim 5 , wherein the LPP message indicates at least one of:
sidelink positioning assistance information comprising at least one of a sidelink Transmission/Reception Point (TRP) identifier, a synchronization signal block information of the sidelink TRP, or geographical coordinates of the sidelink TRP;
a sidelink positioning reference signal configuration; or
spatial direction information of sidelink positioning reference signal resources.
7 . The client device according to claim 1 , wherein the second control message further indicates a request to:
de-activate the first positioning procedure, or
continue having the first positioning procedure be active.
8 . The client device according to claim 1 , wherein the second control message further indicates one or more identities of sidelink TRPs for the second positioning procedure when being based on sidelink measurements.
9 . A network node for a communication system, the network node comprising at least one processor and being configured to:
transmit a first control message to a client device having activated a first positioning procedure, wherein the first control message indicates an instruction to activate a second positioning procedure,
wherein the first positioning procedure is an absolute positioning procedure providing an absolute position of the client device and the second positioning procedure is a relative positioning procedure providing a relative position of the client device, or the first positioning procedure provides a relative position of the client device and the second positioning procedure provides an absolute position of the client device, and
wherein a second control message, indicating a request to activate the second positioning procedure, is transmitted to the network node prior to the reception of the first control message.
10 . The network node according to claim 9 , wherein the first control message further indicates an instruction to:
de-activate the first positioning procedure, or
continue having the first positioning procedure be active.
11 . The network node according to claim 9 , wherein the absolute position defines a position of the client device in a coordinate system and the relative position defines a spatial relationship between the client device and one or more objects.
12 . The network node according to claim 9 , wherein the first positioning procedure is an absolute positioning procedure based on Uu measurements and the second positioning procedure is a relative positioning procedure based on sidelink measurements.
13 . The network node according to claim 9 , wherein the network node is a Location Management Function, and wherein the first control message is a LPP message.
14 . The network node according to claim 13 , wherein the LPP message indicates at least one of:
sidelink positioning assistance information comprising at least one of a sidelink TRP identifier, a synchronization signal block information of the sidelink TRP, or geographical coordinates of the sidelink TRP;
a sidelink positioning reference signal configuration; or
spatial direction information of sidelink positioning reference signal resources.
15 . The network node according to claim 9 , wherein the second control message further indicates a request to:
de-activate the first positioning procedure, or
continue having the first positioning procedure be active.
16 . The network node according to claim 9 , wherein the second control message further indicates one or more identities of sidelink TRPs for the second positioning procedure when being based on sidelink measurements.
17 . A method for a network node, the method comprising:
transmitting a first control message to a client device having activated a first positioning procedure, wherein the first control message indicates an instruction to activate a second positioning procedure,
wherein the first positioning procedure is an absolute positioning procedure providing an absolute position of the client device and the second positioning procedure is a relative positioning procedure providing a relative position of the client device, or the first positioning procedure provides a relative position of the client device and the second positioning procedure provides an absolute position of the client device, and
wherein a second control message, indicating a request to activate the second positioning procedure, is transmitted to the network node prior to the reception of the first control message.
18 . A non-transitory computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to claim 17 is implemented.
19 . The method of claim 17 , wherein the second control message further indicates a request to:
de-activate the first positioning procedure, or
continue having the first positioning procedure be active.
20 . The method of claim 17 , wherein the second control message further indicates one or more identities of sidelink TRPs for the second positioning procedure when being based on sidelink measurements.