System and method of downlink-uplink timing relationship
A system and method of providing an enhanced downlink (DL)-uplink (UL) timing relationship. The system and method include identifying, by a first wireless communication device, an offset between a first time-domain tag at which the first wireless communication device detects a signal transmitted from a wireless communication node and a second time-domain tag at which the first wireless communication device applies the signal. In some embodiments, the offset includes at least one of a common offset portion or a user equipment (UE)-specific offset portion.
1. A wireless communication method, comprising:
receiving, by a first wireless communication device, a system information block (SIB indicating at least one of a common offset portion or a user equipment (UE)-specific offset portion; and
identifying, by the first wireless communication device, an offset between a first time-domain tag at which the first wireless communication device detects a signal transmitted from a wireless communication node and a second time-domain tag at which the first wireless communication device applies the signal,
wherein the offset includes at least one of the common offset portion or the UE-specific offset portion, wherein at least one of:
the offset is added to a component (k) of the second time-domain tag; or
the offset is a function of 2 to the power of u, where u is a subcarrier spacing configuration.
2. The wireless communication method of claim 1 , wherein the first wireless communication device applies the signal comprises:
transmitting, by the first wireless communication device, data according to a scheduling; or
applying, by the first wireless communication device, a configuration from the wireless communication node; or
transmitting, by the first wireless communication device, feedback of receiving signaling.
3. The wireless communication method of claim 1 , wherein the first wireless communication device and a second wireless communication device identify the same common offset portion, in response to satisfying at least one of following conditions:
the first wireless communication device and the second wireless communication device sharing a same time-frequency resource;
the first wireless communication device and the second wireless communication device sharing a same demodulation reference signal (DMRS) resource group;
the first wireless communication device and the second wireless communication device sharing a same QuasiCo-Location relationship; or
the first wireless communication device and the second wireless communication device sharing a same UE group.
4. The wireless communication method of claim 1 , further comprising:
obtaining, by the first wireless communication device, at least one of the common offset portion or the UE specific offset portion based on at least one of:
a timing advance value being indicated by the wireless communication node;
a timing advance value being calculated by the first wireless communication device; or
a timing advance value being reported by the first wireless communication device.
5. The wireless communication method of claim 4 , wherein the timing advance value is indicated by the wireless communication node by at least one of:
broadcasting information received by the first wireless communication device;
SIB information received by the first wireless communication device in the SIB; or
a Radio Resource Control (RRC) configuration message received by the first wireless communication device.
6. The wireless communication method of claim 4 , wherein the timing advance value is calculated by the first wireless communication device based on at least one of:
a location of the first wireless communication device; or
a location of a satellite associated with the wireless communication node.
7. The wireless communication method of claim 6 , wherein the location of the first wireless communication device corresponds to a reference point in an area associated with the wireless communication node.
8. The wireless communication method of claim 7 , wherein the reference point is configured by the wireless communication node.
9. The wireless communication method of claim 1 , wherein a unit of the common offset portion is either a slot or a frame, and wherein a unit of the UE specific offset portion is either a slot or a frame.
10. The wireless communication method of claim 9 , further comprising:
receiving, by the first wireless communication device via signaling, at least one of the unit of the common offset portion or the unit of the UE specific offset portion.
11. The wireless communication method of claim 9 , wherein at least one of the unit of the common offset portion or the unit of the UE-specific offset portion is predefined.
12. The wireless communication method of claim 11 , wherein the unit of the common offset portion is predefined to be the frame.
13. The wireless communication method of claim 11 , wherein the unit of the UE-specific offset portion is predefined to be the slot.
14. The wireless communication method of claim 1 , wherein the signal includes at least one of a downlink control information (DCI) signal, a random access response (RAR) signal, or a medium access control (MAC) control element (CE).
15. The wireless communication method of claim 1 , wherein the first wireless communication device applies the signal comprises:
transmitting, by the first wireless communication device, a physical uplink shared channel (PUSCH); or
transmitting, by the first wireless communication device, a hybrid automatic repeat request-acknowledgement (HARQ-ACK) on a physical uplink control channel (PUCCH); or
transmitting, by the first wireless communication device, a channel state information (CSI) report; or
applying, by the first wireless communication device, a configuration by a medium access control (MAC) control element (CE); or
transmitting, by the first wireless communication device, a sounding reference signal (SRS).
16. A first wireless communication device, comprising:
at least one processor configured to:
receive a system information block (SIB) indicating at least one of a common offset portion or a user equipment (UE)-specific offset portion; and
identify an offset between a first time-domain tag at which the first wireless communication device detects a signal transmitted from a wireless communication node and a second time-domain tag at which the first wireless communication device applies the signal,
wherein the offset includes at least one of the common offset portion or the UE-specific offset portion, wherein at least one of:
the offset is added to a component (k) of the second time-domain tag; or
the offset is a function of 2 to the power of u, where u is a subcarrier spacing configuration.
17. The first wireless communication device of claim 16 , wherein at least one processor is configured to:
transmit, via a transmitter, data according to a scheduling; or
apply a configuration from the wireless communication node; or
transmit, via the transmitter, feedback of receiving signaling.