Subframe configuration method and related device
Embodiments of the present disclosure includes example subframe configuration methods and related devices. One example method includes configuring, by a network-side device, a target subframe, where the target subframe includes at least one sounding reference signal (SRS) symbol used to send an SRS signal. The network-side device can then send first configuration signaling to a terminal device, where the first configuration signaling includes a resource configuration of the target subframe or an SRS configuration of the target subframe.
1. A subframe configuration method, comprising:
configuring, by a network-side device, a target subframe, wherein the target subframe comprises at least one sounding reference signal (SRS) symbol used to send an SRS signal; and
sending, by the network-side device, first configuration signaling to a terminal device, wherein the first configuration signaling comprises a resource configuration of the target subframe or an SRS configuration of the target subframe, wherein the SRS configuration of the target subframe comprises cell-specific SRS configuration information or user-specific SRS configuration information, wherein the cell-specific SRS configuration information is used to identify the SRS symbol in the target subframe, wherein the user-specific SRS configuration information is used to identify an SRS resource that is allocated to the terminal device and that is in the SRS symbol in the target subframe, wherein the SRS resource comprises a time domain resource, a frequency domain resource, or a code domain resource, wherein the time domain resource comprises one or more SRS symbols, and wherein the code domain resource comprises one or more SRS sequences.
2. The method according to claim 1 , wherein after the sending, by the network-side device, first configuration signaling to a terminal device, the method further comprises:
sending, by the network-side device, second configuration signaling to the terminal device, wherein the second configuration signaling comprises a shared channel indication or a first symbol indication, wherein the shared channel indication is used to indicate a symbol occupied by a shared channel in the target subframe, wherein the first symbol indication is used to indicate a symbol available for SRS transmission, and wherein the terminal device determines, according to the first symbol indication, the symbol occupied by the shared channel in the target subframe.
3. The method according to claim 2 , wherein the sending, by the network-side device, second configuration signaling to the terminal device comprises:
sending, by the network-side device, downlink control information (DCI) to the terminal device, wherein the DCI carries the second configuration signaling.
4. The method according to claim 3 , wherein the method further comprises:
determining, by the network-side device based on the symbol occupied by the shared channel in the target subframe, a symbol occupied by a demodulation reference signal (DMRS) in the target subframe; and
sending or receiving, by the network-side device, the DMRS based on the symbol occupied by the DMRS.
5. The method according to claim 3 , wherein the sending, by the network-side device, first configuration signaling to a terminal device comprises:
when at least one frequency division duplex (FDD) serving cell is configured for the terminal device:
configuring, by the network-side device, the first configuration signaling for an uplink transmission frequency band and a downlink transmission frequency band of the FDD serving cell, and sending the first configuration signaling to the terminal device; or
configuring, by the network-side device, the first configuration signaling for the FDD serving cell, and sending the first configuration signaling to the terminal device.
6. A network-side device, comprising:
at least one processor, the at least one processor configured to configure a target subframe, wherein the target subframe comprises at least one sounding reference signal (SRS) symbol used to send an SRS signal; and
a transceiver, the transceiver configured to send first configuration signaling to a terminal device, wherein the first configuration signaling comprises a resource configuration of the target subframe or an SRS configuration of the target subframe, wherein the SRS configuration of the target subframe comprises cell-specific SRS configuration information or user-specific SRS configuration information, wherein the cell-specific SRS configuration information is used to identify the SRS symbol in the target subframe, wherein the user-specific SRS configuration information is used to identify an SRS resource that is allocated to the terminal device and that is in the SRS symbol in the target subframe, wherein the SRS resource comprises a time domain resource, a frequency domain resource, or a code domain resource, wherein the time domain resource comprises one or more SRS symbols, and wherein the code domain resource comprises one or more SRS sequences.
7. The network-side device according to claim 6 , wherein the transceiver is further configured to:
after sending the first configuration signaling to the terminal device, send second configuration signaling to the terminal device, wherein the second configuration signaling comprises a shared channel indication or a first symbol indication, wherein the shared channel indication is used to indicate a symbol occupied by a shared channel in the target subframe, wherein the first symbol indication is used to indicate a symbol available for SRS transmission, and wherein the terminal device determines, according to the first symbol indication, the symbol occupied by the shared channel in the target subframe.
8. The network-side device according to claim 7 , wherein the transceiver is configured to send downlink control information (DCI) to the terminal device, wherein the DCI carries the second configuration signaling.
9. The network-side device according to claim 8 , wherein the at least one processor is further configured to:
determine, based on the symbol occupied by the shared channel in the target subframe, a symbol occupied by a demodulation reference signal (DMRS) in the target subframe; and
send or receive the DMRS based on the symbol occupied by the DMRS.
10. The network-side device according to claim 8 , wherein:
the at least one processor is configured to:
when at least one frequency division duplex (FDD) serving cell is configured for the terminal device:
configure the first configuration signaling for an uplink transmission frequency band and a downlink transmission frequency band of the FDD serving cell; or
configure the first configuration signaling for the FDD serving cell; and
the transceiver is further configured to send the first configuration signaling to the terminal device.
11. A terminal device, comprising:
a transceiver, the transceiver configured to receive first configuration signaling sent by a network-side device, wherein the first configuration signaling comprises a resource configuration of a target subframe or a sounding reference signal (SRS) configuration of the target subframe, wherein the target subframe comprises at least one SRS symbol, wherein the SRS symbol is used to send an SRS signal, wherein the SRS configuration of the target subframe comprises cell-specific SRS configuration information or user-specific SRS configuration information, wherein the cell-specific SRS configuration information is used to identify the SRS symbol in the target subframe, wherein the user-specific SRS configuration information is used to identify an SRS resource that is allocated to the terminal device and that is in the SRS symbol in the target subframe, wherein the SRS resource comprises a time domain resource, a frequency domain resource, or a code domain resource, wherein the time domain resource comprises one or more SRS symbols, and wherein the code domain resource comprises one or more SRS sequences; and
at least one processor, the at least one processor configured to:
determine the SRS symbol in the target subframe based on the cell-specific SRS configuration information, or determine, based on the user-specific SRS configuration information, the SRS resource that is allocated to the terminal device and that is in the SRS symbol in the target subframe; and
obtain, based on the resource configuration of the target subframe in the first configuration signaling, the target subframe through configuration; or
perform the SRS configuration of the target subframe based on the SRS configuration of the target subframe in the first configuration signaling.
12. The terminal device according to claim 11 , wherein:
the transceiver is further configured to receive second configuration signaling sent by the network-side device, wherein the second configuration signaling comprises a shared channel indication or a first symbol indication, wherein the shared channel indication is used to indicate a symbol occupied by a shared channel in the target subframe, wherein the first symbol indication is used to indicate a symbol available for SRS transmission, and wherein the terminal device determines, according to the first symbol indication, the symbol occupied by the shared channel in the target subframe; and
the at least one processor is further configured to determine, according to the shared channel indication or the first symbol indication, the symbol occupied by the shared channel in the target subframe.
13. The terminal device according to claim 12 , wherein the transceiver is configured to receive downlink control information (DCI) sent by the network-side device, and wherein the DCI carries the second configuration signaling.
14. The terminal device according to claim 13 , wherein the at least one processor is further configured to:
determine, based on the symbol occupied by the shared channel, a symbol occupied by a demodulation reference signal (DMRS) in the target subframe; and
send or receive the DMRS based on the symbol occupied by the DMRS.
15. The terminal device according to claim 13 , wherein:
the transceiver is configured to:
when at least one frequency division duplex (FDD) serving cell is configured for the terminal device, receive the first configuration signaling that is for an uplink transmission frequency band and a downlink transmission frequency band of the FDD serving cell and that is sent by the network-side device; or
receive the first configuration signaling that is for the FDD serving cell and that is sent by the network-side device; and
the at least one processor is configured to:
determine, based on the first configuration signaling for the uplink transmission frequency band and the downlink transmission frequency band of the FDD serving cell, a shared channel symbol location or a DMRS symbol location of the FDD serving cell; or
determine, based on the first configuration signaling for the FDD serving cell, a shared channel symbol location or a DMRS symbol location of the FDD serving cell.