Priority adaptation of positioning reference signal
Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media for priority adaptation of a positioning reference signal (PRS). In example embodiments, a first device receives, from a second device, an indication associated with a change of a priority level for transmitting a positioning reference signal. Based on the received indication, the first device changes the priority level for transmitting the positioning reference signal.
1. An apparatus comprising:
at least one processor; and
at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:
receive an indication associated with a change of a priority level for transmitting a positioning reference signal; and
change, based on the indication, the priority level for transmitting the positioning reference signal
wherein the indication associated with the change of the priority level comprises the following:
a configuration message to indicate a set of configurations for the positioning reference signal associated with a set of priority levels for the transmission of the positioning reference signal;
a configuration message to indicate a configuration for the positioning reference signal associated with a set of priority levels for the transmission of the positioning reference signal; and
an instruction to change the priority level
wherein the apparatus is caused to:
detect collision of the transmission of the positioning reference signal with a further transmission; and
drop the positioning reference signal based on the changed priority level for the transmission of the positioning reference signal,
wherein the apparatus is further caused to:
drop the positioning reference signal when the further transmission comprises the following:
transmission of data from a predetermined logical channel on a physical uplink shared channel,
transmission of a predetermined media access control element on a physical uplink shared channel,
transmission of data with an approaching delivery deadline on a physical uplink shared channel,
transmission of a predetermined traffic flow on a physical uplink shared channel,
transmission of a physical uplink shared channel multiplexed with transmission of predetermined uplink control information, and
transmission of predetermined uplink control information on a physical uplink control channel.
2. The apparatus of claim 1 , wherein
the configuration message to indicate the set of configurations for the positioning reference signal associated with the set of priority levels further indicates a periodicity or an event for activating a configuration from the set of configurations for the positioning reference signal; or
the configuration message to indicate the configuration for the positioning reference signal associated with the set of priority levels further indicates a periodicity or an event for switching between priority levels from the set of priority levels.
3. The apparatus of claim 1 , wherein
the priority level characterizes the priority of a positioning reference signal transmission compared to other transmissions on channels and comprises:
a high priority positioning reference signal that can overwrite both dynamic grant physical uplink shared channel and configured grant physical uplink shared channel,
a medium priority positioning reference signal that can overwrite configured grant physical uplink shared channel but not dynamic grant physical uplink shared channel,
a low priority positioning reference signal that is always dropped when colliding with any physical uplink shared channel.
4. The apparatus of claim 3 , wherein the apparatus is caused to drop or transmit the positioning reference signal by:
transmitting the positioning reference signal when the changed priority level for the transmission of the positioning reference signal is higher than a priority level for the further transmission.
5. The apparatus of claim 3 , wherein the apparatus is caused to drop or transmit the positioning reference signal by:
dropping the positioning reference signal when the changed priority level for the transmission of the positioning reference signal is lower than a priority level for the further transmission.
6. The apparatus of claim 3 , wherein the priority level characterizes the priority of a positioning reference signal transmission compared to other transmissions on channels and comprises:
a top priority positioning reference signal that can overwrite all physical uplink control channels,
a high priority positioning reference signal that can overwrite all physical uplink shared channels except for physical uplink control channel carrying high priority HARQ-ACK,
a medium priority positioning reference signal that can only overwrite physical uplink shared channel carrying channel state information but cannot overwrite any physical uplink shared channel carrying HARQ-ACK,
a low priority positioning reference signal that is always dropped when colliding with any physical uplink control channel.
7. An apparatus comprising:
at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:
send, to a first device, an indication associated with a change of a priority level for transmitting, by the first device, a positioning reference signal; and
receive, based on the indication, the positioning reference signal from the first device,
wherein the indication associated with the change of the priority level comprises the following:
a configuration message to indicate a set of configurations for the positioning reference signal associated with a set of priority levels for the transmission of the positioning reference signal;
a configuration message to indicate a configuration for the positioning reference signal associated with a set of priority levels for the transmission of the positioning reference signal; and
an instruction to change the priority level,
wherein the apparatus is caused to:
determine the requirement associated with the priority level based on:
information about the requirement associated with the priority level, from a third device,
positioning requirement associated with the first device, and
a mobility level of the first device,
wherein the requirement associated with the priority level comprises the following:
a priority level to be used for the transmission of the positioning reference signal;
a minimum priority level to be used for the transmission of the positioning reference signal;
a maximum priority level to be used for the transmission of the positioning reference signal; and
a periodicity for changing the priority level.
8. The apparatus of claim 7 , wherein:
the configuration message to indicate the set of configurations for the positioning reference signal associated with the set of priority levels further indicates a periodicity or an event for activating a configuration from the set of configurations for the positioning reference signal; or
the configuration message to indicate the configuration for the positioning reference signal associated with the set of priority levels further indicates a periodicity or an event for switching between priority levels from the set of priority levels.
9. The apparatus of claim 7 , wherein the apparatus is caused to send the indication by:
sending the indication to the first device based on requirement associated with the priority level for transmitting the positioning reference signal.
10. A method implemented at a first device, comprising:
receiving, from a second device, an indication associated with a change of a priority level for transmitting a positioning reference signal; and
changing, based on the indication, the priority level for transmitting the positioning reference signal,
wherein the indication associated with the change of the priority level comprises at least one of:
a configuration message to indicate a set of configurations for the positioning reference signal associated with a set of priority levels for the transmission of the positioning reference signal;
a configuration message to indicate a configuration for the positioning reference signal associated with a set of priority levels for the transmission of the positioning reference signal; or
an instruction to change the priority level,
the method further comprising:
dropping the positioning reference signal when the further transmission comprises the following:
transmission of data from a predetermined logical channel on a physical uplink shared channel,
transmission of a predetermined media access control element on a physical uplink shared channel,
transmission of data with an approaching delivery deadline on a physical uplink shared channel,
transmission of a predetermined traffic flow on a physical uplink shared channel,
transmission of a physical uplink shared channel multiplexed with transmission of predetermined uplink control information, and
transmission of predetermined uplink control information on a physical uplink control channel.
11. The method of claim 10 , wherein
the configuration message to indicate the set of configurations for the positioning reference signal associated with the set of priority levels further indicates a periodicity or an event for activating a configuration from the set of configurations for the positioning reference signal; or
the configuration message to indicate the configuration for the positioning reference signal associated with the set of priority levels further indicates a periodicity or an event for switching between priority levels from the set of priority levels.
12. The method of claim 10 , further comprising:
detecting collision of the transmission of the positioning reference signal with a further transmission; and
dropping or transmitting the positioning reference signal based on the changed priority level for the transmission of the positioning reference signal.
13. The method of claim 12 , wherein dropping or transmitting the positioning reference signal comprises:
transmitting the positioning reference signal when the changed priority level for the transmission of the positioning reference signal is higher than a priority level for the further transmission.
14. The method of claim 12 , wherein dropping or transmitting the positioning reference signal comprises:
dropping the positioning reference signal when the changed priority level for the transmission of the positioning reference signal is lower than a priority level for the further transmission.