Method and apparatus for performing NR Sidelink communication on LTE carrier
A method that includes receiving a first time division duplex uplink-downlink (TDD UL-DL) configuration related to LTE, obtaining a second TDD UL-DL configuration related to NR sidelink communication, on the basis of the first TDD UL-DL configuration, and performing the NR sidelink communication with a second apparatus on a carrier related to the LTE, on the basis of the second TDD UL-DL configuration. The first TDD UL-DL configuration may include an UL subframe, a DL subframe, and a special subframe, and the special subframe may include a downlink pilot time slot (Dwpts) symbol, an uplink pilot time slot (Uppts) symbol, and a gap symbol. The NR sidelink communication is allowed for the first device in a first symbol, based on the Uppts symbol and the gap symbol overlapping with the first symbol.
1 . A method for performing, by a first device, wireless communication, the method comprising:
receiving a first time division duplex uplink-downlink configuration (TDD UL-DL configuration) related to LTE;
obtaining a second TDD UL-DL configuration related to NR sidelink communication based on the first TDD UL-DL configuration; and
performing the NR sidelink communication with a second device on a carrier related to the LTE based on the second TDD UL-DL configuration,
wherein the first TDD UL-DL configuration includes a UL subframe, a DL subframe and a special subframe,
wherein the special subframe includes a downlink pilot time slot (Dwpts) symbol, an uplink pilot time slot (Uppts) symbol and a gap symbol, and
wherein the NR sidelink communication is allowed for the first device in a first symbol, based on the Uppts symbol and the gap symbol related to the first TDD UL-DL configuration overlapping with the first symbol related to the second TDD UL-DL configuration.
2 . The method of claim 1 , further comprising:
transmitting, to the second device, a physical sidelink broadcast channel (PSBCH) based on the second TDD UL-DL configuration.
3 . The method of claim 1 , wherein a numerology of the first TDD UL-DL configuration and a numerology of the second TDD UL-DL configuration are different.
4 . The method of claim 3 , wherein the numerology of the first TDD UL-DL configuration or the numerology of the second TDD UL-DL configuration includes at least one of sub-carrier spacing or a length of cyclic prefix.
5 . The method of claim 3 , wherein the NR sidelink communication with the second device performed on the carrier related to the LTE is not deactivated, based on the numerology of the first TDD UL-DL configuration and the numerology of the second TDD UL-DL configuration being different.
6 . The method of claim 3 , wherein the NR sidelink communication with the second device performed on the carrier related to the LTE is not deactivated, based on Uu communication of the first device with a base station on the carrier related to the LTE being not performed.
7 . The method of claim 1 , wherein the NR sidelink communication is allowed for the first device in the first symbol, based on Uu communication of the first device with a base station on the carrier related to the LTE being not performed.
8 . The method of claim 1 , wherein the second TDD UL-DL configuration is obtained based on a UL/DL pattern for the first TDD UL-DL configuration being shifted.
9 . The method of claim 7 , wherein the first TDD UL-DL configuration is shifted in order of a plurality of second DL subframes, a first DL subframe, the special subframe and the UL subframe, based on the first TDD UL-DL configuration being configured in order of the first DL subframe, the special subframe, the UL subframe and the plurality of the second DL subframes.
10 . The method of claim 7 , wherein the shifting is performed based on circular shift.
11 . The method of claim 1 , wherein the NR sidelink communication is not performed, based on the second TDD UL-DL configuration related to the NR sidelink communication cannot being obtained based on the first TDD UL-DL configuration.
12 . The method of claim 1 , wherein a reference sub-carrier spacing (SCS) value of the first device is configured equal to an SL SCS, based on the first device being a UE out of coverage of a base station.
13 . The method of claim 12 , wherein the reference SCS is pre-configured to the first device.
14 . A first device for performing wireless communication, the first device comprising:
one or more memories storing instructions;
one or more transceivers; and
one or more processors connected to the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions to:
receive a first time division duplex uplink-downlink configuration (TDD UL-DL configuration) related to LTE;
obtain a second TDD UL-DL configuration related to NR sidelink communication based on the first TDD UL-DL configuration; and
perform the NR sidelink communication with a second device on a carrier related to the LTE based on the second TDD UL-DL configuration,
wherein the first TDD UL-DL configuration includes a UL subframe, a DL subframe and a special subframe,
wherein the special subframe includes a downlink pilot time slot (Dwpts) symbol, an uplink pilot time slot (Uppts) symbol and a gap symbol, and
wherein the NR sidelink communication is allowed for the first device in a first symbol, based on the Uppts symbol and the gap symbol related to the first TDD UL-DL configuration overlapping with the first symbol related to the second TDD UL-DL configuration.
15 . A device adapted to control a first user equipment (UE), the device comprising:
one or more processors; and
one or more memories operably connectable to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to:
receive a first time division duplex uplink-downlink configuration (TDD UL-DL configuration) related to LTE;
obtain a second TDD UL-DL configuration related to NR sidelink communication based on the first TDD UL-DL configuration; and
perform the NR sidelink communication with a second UE on a carrier related to the LTE based on the second TDD UL-DL configuration,
wherein the first TDD UL-DL configuration includes a UL subframe, a DL subframe and a special subframe,
wherein the special subframe includes a downlink pilot time slot (Dwpts) symbol, an uplink pilot time slot (Uppts) symbol and a gap symbol, and
wherein the NR sidelink communication is allowed for the first UE in a first symbol, based on the Uppts symbol and the gap symbol related to the first TDD UL-DL configuration overlapping with the first symbol related to the second TDD UL-DL configuration.