Methods and apparatuses for transmitting a sidelink positioning reference signal
Embodiments of the present disclosure relate to methods and apparatuses for a sidelink positioning mechanism in 3GPP (3rd Generation Partnership Project) 5G and/or new radio (NR) networks. According to an embodiment of the present disclosure, a method performed by a user equipment (UE) includes: receiving at least one of positioning reference signal (PRS) configuration information and downlink control information (DCI); generating sidelink control information (SCI) based on the at least one of the PRS configuration information and the DCI, wherein the SCI indicates a resource in time and frequency domains for a sidelink-positioning reference signal (SL-PRS); and transmitting the SCI.
1 . A user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the UE to:
receive at least one of positioning reference signal (PRS) configuration information and downlink control information (DCI);
generate sidelink control information (SCI) based on the at least one of the PRS configuration information and the DCI,
wherein the SCI indicates a resource in at least one of a time domain and a frequency domain, and
wherein the resource is for transmitting a sidelink-positioning reference signal (SL-PRS); and
transmit the SCI,
wherein the PRS configuration information, the DCI, or the SCI includes one or more fields, and
wherein the one or more fields are associated with the SL-PRS and include a pattern index value of a PRS pattern of the SL-PRS.
2 . The UE of claim 1 , wherein the one or more fields within the PRS configuration information, the DCI, or the SCI further include:
a comb value of the PRS pattern;
a resource element (RE) offset value set of the PRS pattern;
a frequency domain offset value of the PRS pattern;
a total number of one or more symbols of the SL-PRS; or
a start symbol of the SL-PRS in the time domain.
3 . The UE of claim 1 , wherein the PRS configuration information includes:
information relating to one or more available resources in a resource pool.
4 . The UE of claim 3 , wherein the information relating to the one or more available resources includes at least one of:
a sub-channel index value regarding each of the one or more available resources;
a sub-channel index indication in a bitmap manner regarding each of the one or more available resources and one or more non-available resources in the resource pool;
a resource block (RB) index value regarding each of the one or more available resources;
an RB index indication in a bitmap manner regarding each of the one or more available resources and one or more non-available resources in the resource pool;
a timeslot index value regarding each of the one or more available resources; and
a timeslot index indication in a bitmap manner regarding each of the one or more available resources and one or more non-available resources in the resource pool.
5 . The UE of claim 1 , wherein the SCI is transmitted on at least one of:
a physical sidelink control channel (PSCCH) transmission; and
a physical sidelink shared channel (PSSCH) transmission.
6 . The UE of claim 5 , wherein the at least one processor is further configured to cause the UE to:
determine a total number of the PSCCH transmission, or a first total sub-channel number of the PSCCH transmission, or a second total sub-channel number of the PSCCH transmission and the PSSCH transmission; and
in response to one of the total number and the first total sub-channel number and the second total sub-channel number being larger than one, repeatedly transmit at least one of the PSCCH transmission and the PSSCH transmission.
7 . The UE of claim 6 , wherein the total number is determined based on at least one of:
a total number of one or more sub-channels of the SL-PRS; and
a comb value of a PRS pattern of the SL-PRS.
8 . A base station (BS) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the BS to:
transmit at least one of positioning reference signal (PRS) configuration information and downlink control information (DCI), including a total number of physical sidelink control channel (PSCCH) transmissions, a first total sub-channel number of the PSCCH transmissions, or a second total sub-channel number of the PSCCH transmissions and physical sidelink shared channel (PSSCH) transmissions; and
receive information associated with a relative geographical position between two or more user equipments (UEs).
9 . The BS of claim 8 , wherein at least one of the PRS configuration information and the DCI includes one or more fields, and wherein the one or more fields are associated with a sidelink-positioning reference signal (SL-PRS).
10 . The BS of claim 9 , wherein the relative geographical position between the two or more UEs is measured based on the SL-PRS.
11 . The BS of claim 9 , wherein the one or more fields further include:
a comb value of the PRS pattern;
a resource element (RE) offset value set of the PRS pattern;
a frequency domain offset value of the PRS pattern;
a total number of one or more symbols of the SL-PRS; or
a start symbol of the SL-PRS in the time domain.
12 . The BS of claim 8 , wherein the PRS configuration information includes:
information relating to one or more available resources in a resource pool.
13 . The BS of claim 12 , wherein the information relating to the one or more available resources include at least one of:
a sub-channel index value regarding each of the one or more available resources;
a sub-channel index indication in a bitmap manner regarding each of the one or more available resources and one or more non-available resources in the resource pool;
a resource block (RB) index value regarding each of the one or more available resources;
an RB index indication in a bitmap manner regarding each of the one or more available resources and one or more non-available resources in the resource pool;
a timeslot index value regarding each of the one or more available resources; and
a timeslot index indication in a bitmap manner regarding each of the one or more available resources and one or more non-available resources in the resource pool.
14 . A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and configured to cause the processor to:
receive at least one of positioning reference signal (PRS) configuration information and downlink control information (DCI);
generate sidelink control information (SCI) based on the at least one of the PRS configuration information and the DCI,
wherein the SCI indicates a resource in at least one of a time domain and a frequency domain, and wherein the resource is for transmitting a sidelink-positioning reference signal (SL-PRS); and
transmit the SCI,
wherein the PRS configuration information, the DCI, or the SCI includes one or more fields, and
wherein the one or more fields are associated with the SL-PRS and include a pattern index value of a PRS pattern of the SL-PRS.
15 . The processor of claim 14 , wherein the PRS configuration information includes information relating to one or more available resources in a resource pool.
16 . The processor of claim 14 , wherein the SCI is transmitted on at least one of:
a physical sidelink control channel (PSCCH) transmission; and
a physical sidelink shared channel (PSSCH) transmission.
17 . A method performed by a user equipment (UE), the method comprising:
receiving at least one of positioning reference signal (PRS) configuration information and downlink control information (DCI);
generating sidelink control information (SCI) based on the at least one of the PRS configuration information and the DCI,
wherein the SCI indicates a resource in at least one of a time domain and a frequency domain, and wherein the resource is for transmitting a sidelink-positioning reference signal (SL-PRS); and
transmitting the SCI,
wherein the PRS configuration information, the DCI, or the SCI includes one or more fields, and
wherein the one or more fields are associated with the SL-PRS and include a pattern index value of a PRS pattern of the SL-PRS.
18 . The method of claim 17 , wherein the one or more fields within the at least one of the PRS configuration information, the DCI, and the SCI include at least one of:
a comb value of the PRS pattern;
a resource element (RE) offset value set of the PRS pattern;
a frequency domain offset value of the PRS pattern;
a total number of one or more symbols of the SL-PRS; and
a start symbol of the SL-PRS in the time domain.
19 . The method of claim 17 , wherein the PRS configuration information includes:
information relating to one or more available resources in a resource pool.
20 . The method of claim 17 , wherein the SCI is transmitted on at least one of:
a physical sidelink control channel (PSCCH) transmission; and
a physical sidelink shared channel (PSSCH) transmission.
21 . The method of claim 20 , further comprising:
determining a total number of the PSCCH transmission, or a first total sub-channel number of the PSCCH transmission, or a second total sub-channel number of the PSCCH transmission and the PSSCH transmission; and
in response to one of the total number and the first total sub-channel number and the second total sub-channel number being larger than one, repeatedly transmitting at least one of the PSCCH transmission and the PSSCH transmission.