Methods and apparatus for enhancing the configurability of 5G new radio positioning reference signals
A method for transmitting a positioning reference signal, PRS, by a base station operating a cell in a 5G New Radio, NR, wireless communication system. The method comprising: determining a resource allocation from time and frequency resources of the cell for the transmission of the PRS; and transmitting the PRS using the determined resource allocation.
1 . A method for transmitting a positioning reference signal (PRS) by a base station in a cell in a wireless communication system, the method comprising:
determining a resource allocation of time and frequency resources for transmission of the PRS in the cell;
transmitting an indication of the determined resource allocation through a broadcast channel; and
transmitting the PRS to a terminal device of in a radio resource control (RRC) idle or inactive state in the cell, based on the determined resource allocation,
wherein the time and frequency resources are divided into one or more channels, including the broadcast channel,
wherein the resource allocation comprises a PRS comb pattern in which the PRS is mapped every k subcarriers in a frequency domain, where k is 4 or 6, and
wherein the resource allocation further comprises a periodicity of the PRS, and a wakeup periodicity of the terminal device in the RRC idle or inactive state is two or more times the periodicity of the PRS.
2 . The method of claim 1 ,
wherein the time and frequency resources are divided into resource blocks of a predetermined size in time and frequency, and
wherein the resource allocation is based on a minimum resource allocation of one of a partial resource block, a single resource block, or a group of resource blocks.
3 . The method of claim 1 , wherein the transmitting of the PRS includes transmitting the PRS using at least one of an orthogonal cover code, an interleaving pattern, a scrambling code, or power adjustment.
4 . The method of claim 1 , wherein the transmitting of the PRS includes periodically transmitting the PRS in the determined resource allocation.
5 . The method of claim 1 , wherein the determining of the resource allocation and the transmitting of the PRS are performed in response to a request received by the base station from the terminal device in the cell.
6 . The method of claim 1 , wherein the PRS and at least one of data or control signal are spatially multiplexed.
7 . The method of claim 1 ,
wherein the PRS is transmitted using a first beamformed beam, and
wherein at least one of data or control signal is transmitted using a second beamformed beam different from the first beamformed beam.
8 . The method of claim 1 , wherein the time and frequency resources of the determined resource allocation vary in position in frequency according to a frequency hopping pattern.
9 . A method for receiving a positioning reference signal (PRS) by a terminal device in a cell in a wireless communication system, the method comprising:
receiving, through a broadcast channel, an indication of a resource allocation of time and frequency resources for reception of the PRS in the cell;
identifying the resource allocation of the time and frequency resources for the reception of the PRS in the cell; and
receiving, from a base station, the PRS in a radio resource control (RRC) idle or inactive state in the cell, based on the identified resource allocation,
wherein the time and frequency resources are divided into one or more channels, including the broadcast channel,
wherein the resource allocation comprises a PRS comb pattern in which the PRS is mapped every k subcarriers in a frequency domain, where k is 4 or 6, and
wherein the resource allocation further comprises a periodicity of the PRS, and a wakeup periodicity of the terminal device in the RRC idle or inactive state is two or more times the periodicity of the PRS.
10 . The method of claim 9 , further comprising:
determining a position measurement based on the received PRS; and
transmitting the determined position measurement to the base station.
11 . A base station configured to transmit a positioning reference signal (PRS) in a cell in a wireless communication system, the base station comprising:
a transceiver; and
a processor coupled to the transceiver and configured to:
determine a resource allocation of time and frequency resources for transmission of the PRS in the cell,
transmit an indication of the determined resource allocation through a broadcast channel, and
transmit the PRS to a terminal device in a radio resource control (RRC) idle or inactive state in the cell, based on the determined resource allocation,
wherein the time and frequency resources are divided into one or more channels, including the broadcast channel,
wherein the resource allocation comprises a PRS comb pattern in which the PRS is mapped every k subcarriers in a frequency domain, where k is 4 or 6, and
wherein the resource allocation further comprises a periodicity of the PRS, and a wakeup periodicity of the terminal device in the RRC idle or inactive state is two or more times the periodicity of the PRS.
12 . The base station of claim 11 , wherein the processor is further configured to determine the resource allocation and transmit the PRS in response to a request received by the base station from the terminal device in the cell.
13 . The base station of claim 11 , wherein the PRS and at least one of data or control signal are spatially multiplexed.
14 . The base station of claim 11 ,
wherein the PRS is transmitted using a first beamformed beam, and
wherein at least one of data or control signal is transmitted using a second beamformed beam different from the first beamformed beam.
15 . A terminal device configured to receive a positioning reference signal (PRS) in a cell in a wireless communication system, the terminal device comprising:
a transceiver; and
a processor coupled to the transceiver and configured to:
receive, through a broadcast channel, an indication of a resource allocation of time and frequency resources for reception of the PRS in the cell,
identify the resource allocation of the time and frequency resources for the reception of the PRS in the cell, and
receive, from a base station, the PRS in a radio resource control (RRC) idle or inactive state in the cell, based on the identified resource allocation,
wherein the time and frequency resources are divided into one or more channels, including the broadcast channel,
wherein the resource allocation comprises a PRS comb pattern in which the PRS is mapped every k subcarriers in a frequency domain, where k is 4 or 6, and
wherein the resource allocation further comprises a periodicity of the PRS, and a wakeup periodicity of the terminal device in the RRC idle or inactive state is two or more times the periodicity of the PRS.
16 . The terminal device of claim 15 , wherein the processor is further configured to:
determine a position measurement based on the received PRS, and
transmit the determined position measurement to the base station.