RRC signaling in NTN wireless networks
A method and a device in a node used for wireless communications. A first node firstly receives first information in a first time window, the first information being used to determine a first time interval length; and then receives second information in a second time window; and first operates a target signal in a target time-frequency resource set; a time-domain resource occupied by the target time-frequency resource set belongs to one of the K1 time windows; a time interval length between any two of the K1 time windows which are adjacent in time domain is equal to the first time interval length; when the second time window is one of the K1 time windows, the second information can be used to determine configuration information for the target signal. By streamlining configurations for higher-layer signaling in NTN communications, the present disclosure can reduce the control information payload.
1 . A user equipment (UE) for wireless communications, comprising:
a receiver configured to receive first radio resource control (RRC) signaling in a first time window of a plurality of K1 time windows arranged in a chronological order, the first RRC signaling being used to determine a first time interval length;
the receiver further configured to receive second RRC signaling in a second time window; and
a transceiver configured to transmit or receive a phase tracking reference signal (PT-RS) in a target time-frequency resource set, and configured to receive or transmit a third signal in a second time-frequency resource set;
wherein a time interval length between any two time windows which are adjacent in time domain among the K1 time windows is equal to the first time interval length; wherein when the second time window is one of the K1 time windows, the second RRC signaling is used to determine configuration information for the PT-RS signal, otherwise, the second RRC signaling can only be used to determine configuration information for a signal other than the PT-RS signal, wherein a time-domain resource occupied by the second time-frequency resource set belongs to one of the K1 time windows, and wherein the third signal and the PT-RS are spatially correlated.
2 . The UE according to claim 1 , wherein the first RRC signaling is used to determine a first parameter group for determining the first time interval length, and wherein the first parameter group comprises at least one of a type corresponding to a transmitter for the first RRC signaling, a height of a transmitter for the first RRC signaling, or a moving speed and direction of a transmitter for the first RRC signaling.
3 . The UE according to claim 1 , wherein duration time of any time window of the K1 time windows in time domain is equal to a first time value.
4 . The UE according to claim 1 , wherein the receiver is further configured to receive a first signal used to determine a synchronization timing for the K1 time windows.
5 . The UE according to claim 1 , wherein the receiver is further configured to receive a second signal used to determine positional information for the UE, wherein the first time interval length is related to the positional information for the UE.
6 . The UE according to claim 1 , wherein the transceiver is further configured to receive or transmit a fourth signal in a third time-frequency resource set; wherein a time-domain resource occupied by the third time-frequency resource set belongs to a time window outside the K1 time windows, and wherein the fourth signal and the PT-RS are spatially uncorrelated.
7 . The UE according to claim 1 , wherein a first bit block is used for generating the PT-RS and a given signal, wherein the given signal being received in a time window among the K1 time windows other than a time window occupied by the PT-RS, wherein the PT-RS and the given signal can be combined; or, a first bit block is used for generating the PT-RS and a given signal, the given signal being transmitted in a time window among the K1 time windows other than a time window occupied by the PT-RS, the PT-RS and the given signal can be combined.
8 . The UE according to claim 1 , wherein a first bit block is used for generating the PT-RS and a given signal, wherein the given signal being received in a time window among the K1 time windows other than a time window occupied by the PT-RS, wherein the PT-RS and the given signal are quasi-collocated (QCL); or, a first bit block is used for generating the PT-RS and a given signal, the given signal being transmitted in a time window among the K1 time windows other than a time window occupied by the PT-RS, the PT-RS and the given signal are QCL.
9 . The UE according to claim 1 , wherein the second information comprises first sub-information and second sub-information, where the first sub-information is applied within the K1 time windows, while the second sub-information is applied outside the K1 time windows.
10 . The UE according to claim 1 , wherein when the second time window is one of the K1 time windows, the UE assumes that a transmitter for the first information and a transmitter for the second information are co-located.
11 . A non-terrestrial network (NTN) node for wireless communications, comprising:
a transmitter configured to transmit first radio resource control (RRC) signaling in a first time window of a plurality of K1 time windows arranged in a chronological order, the first information being used by a user equipment (UE) receiving the RRC signaling to determine a first time interval length, the transmitter further configured to transmit second RRC signaling in a second time window; and
a transceiver configured to receive or transmit a phase tracking reference signal (PT-RS) in a target time-frequency resource set, and transmit or receive a third signal in a second time-frequency resource set;
wherein the second RRC signaling is used to determine configuration information for the PT-RS, wherein a time-domain resource occupied by the second time-frequency resource set belongs to one of the K1 time windows, and wherein the third signal and the PT-RS are spatially correlated.
12 . The NTN node according to claim 11 , wherein the first RRC signaling is used to determine a first parameter group, the first parameter group is used to determine the first time interval length, and the first parameter group comprises at least one of a type corresponding to the NTN node, a height of the second node, or a moving speed and direction of the second node.
13 . The NTN node according to claim 11 , wherein duration time of any time window of the K1 time windows in time domain is equal to a first time value.
14 . The NTN node according to claim 11 , wherein the transmitter is further configured to transmit a first signal used to determine a synchronization timing for the K1 time windows.
15 . The NTN node according to claim 11 , wherein the transmitter is further configured to transmit a second signal used to determine positional information for the UE, wherein the first time interval length is related to the positional information for the UE.
16 . The NTN node according to claim 11 , wherein the transceiver is further configured to transmit or receive a fourth signal in a third time-frequency resource set; wherein a time-domain resource occupied by the third time-frequency resource set belongs to a time window outside the K1 time windows, and wherein the fourth signal and the PT-RS are spatially uncorrelated.
17 . The NTN node according to claim 11 , wherein a first bit block is used for generating the PT-RS and a given signal, the given signal being received in a time window among the K1 time windows other than a time window occupied by the PT-RS, the PT-RS and the given signal can be combined; or, a first bit block is used for generating the PT-RS and a given signal, the given signal being transmitted in a time window among the K1 time windows other than a time window occupied by the PT-RS, the PT-RS and the given signal can be combined; or, a first bit block is used for generating the PT-RS and a given signal, the given signal being received in a time window among the K1 time windows other than a time window occupied by the PT-RS, the PT-RS and the given signal are quasi-collocated (QCL); or, a first bit block is used for generating the PT-RS and a given signal, the given signal being transmitted in a time window among the K1 time windows other than a time window occupied by the PT-RS, the PT-RS and the given signal are QCL.
18 . A method for wireless communications by a user equipment (UE), the method comprising:
receiving first radio resource control (RRC) signaling in a first time window of a plurality of K1 time windows arranged in a chronological order, the first RRC signaling being used to determine a first time interval length;
receiving second RRC signaling in a second time window;
receiving or transmitting a phase tracking reference signal (PT-RS) in a target time-frequency resource set; and
receiving or transmitting a third signal in a second time-frequency resource set belonging to one of the K1 time windows,
wherein when the second time window is one of the K1 time windows, the second RRC signaling is used to determine configuration information for the PT-RS signal, otherwise, the second RRC signaling can only be used to determine configuration information for a signal other than the PT-RS signal, and wherein the third signal and the PT-RS are spatially correlated.