Signal transmission method and device
Disclosed are a signal transmission method and device for realizing transmission of a triggered reference signal, to enable a terminal to immediately utilize a reference signal to perform a corresponding operation, lower power consumption of the terminal, and to achieve power saving effects. The embodiments of the present application provide a signal transmission method at a network side, the method comprising: sending to a terminal a wakeup signal used to wake up the terminal; and sending a reference signal to the terminal; or sending to a terminal a wakeup signal used to wake up the terminal and a message indicating whether the network side will send a reference signal.
1. A signal transmission method, comprises:
transmitting a wakeup signal for waking up a terminal and indication information indicating whether a network side transmits a reference signal to the terminal;
wherein the wakeup signal is transmitted to the terminal at a first time; and the reference signal is transmitted to the terminal at a second time; wherein the first time is earlier than or equal to the second time;
wherein after transmitting the wakeup signal to the terminal, the method further comprises:
transmitting a Physical Downlink Control Channel, PDCCH, or a physical downlink traffic channel, or a physical downlink reference signal other than the reference signal to the terminal;
wherein the indication information is in the wakeup signal.
2. The method according to claim 1 , wherein the PDCCH or the physical downlink traffic channel or the physical downlink reference signal other than the reference signal is transmitted to the terminal at a third time; wherein the third time is later than or equal to the second time; or the third time is earlier than or equal to the second time.
3. The method according to claim 1 , wherein the reference signal occupies one or more Orthogonal Frequency Division Multiplexing, OFDM, symbols, and when a plurality of OFDM symbols are occupied, the plurality of OFDM symbols are transmitted continuously or discontinuously.
4. A signal transmission method, comprises:
receiving a wakeup signal transmitted by a network side to wake up a terminal; obtaining indication information indicating whether the network side transmits a reference signal; and determining whether to receive the reference signal according to the indication information;
wherein the wakeup signal is a first wakeup signal from a serving cell, and the first wakeup signal is received at a first time;
the reference signal is a first reference signal from the serving cell, and the first reference signal is received at a second time;
wherein the first time is earlier than or equal to the second time;
wherein after the receiving the wakeup signal, the method further comprises:
receiving a Physical Downlink Control Channel, PDCCH, or a physical downlink traffic channel, or a physical downlink reference signal other than the reference signal transmitted by the network side;
wherein the indication information is obtained from the wakeup signal.
5. The method according to claim 4 , wherein the PDCCH or the physical downlink traffic channel or the physical downlink reference signal other than the reference signal is received at a third time; wherein the third time is later than or equal to the second time; or the third time is earlier than or equal to the second time.
6. The method according to claim 4 , wherein after receiving the first wakeup signal, the method further comprises:
receiving a second wakeup signal from a neighbor cell;
receiving a second reference signal from the neighbor cell.
7. A signal transmission device, comprises:
a memory configured to store program instructions;
a processor configured to invoke the program instructions stored in the memory to perform the method according to claim 4 .
8. The device according to claim 7 , wherein the processor is further configured to invoke the program instructions stored in the memory to perform following operations:
receiving the PDCCH or the physical downlink traffic channel or the physical downlink reference signal other than the reference signal transmitted by the network side at a third time; wherein the third time is later than or equal to the second time; or the third time is earlier than or equal to the second time.
9. The device according to claim 7 , wherein the processor is further configured to invoke the program instructions stored in the memory to perform following operations, after receiving the first wakeup signal:
receiving a second wakeup signal from a neighbor cell;
receiving a second reference signal from the neighbor cell.
10. A signal transmission device, comprises:
a memory configured to store program instructions;
a processor configured to invoke the program instructions stored in the memory to perform following operations:
sending a wakeup signal for waking up a terminal and indication information indicating whether a network side transmits a reference signal to the terminal;
wherein the processor is configured to invoke the program instructions to perform following operations:
transmitting the wakeup signal to the terminal at a first time; and transmitting the reference signal to the terminal at a second time; wherein the first time is earlier than or equal to the second time;
wherein the processor is further configured to invoke the program instructions to perform following operations, after transmitting the wakeup signal to the terminal:
transmitting a Physical Downlink Control Channel, PDCCH, or a physical downlink traffic channel, or a physical downlink reference signal other than the reference signal to the terminal;
wherein the indication information is in the wakeup signal.
11. The device according to claim 10 , wherein the processor is configured to invoke the program instructions to perform following operations:
transmitting the PDCCH or the physical downlink traffic channel or the physical downlink reference signal other than the reference signal to the terminal at a third time; wherein the third time is later than or equal to the second time; or the third time is earlier than or equal to the second time.
12. The device according to claim 10 , wherein the reference signal occupies one or more Orthogonal Frequency Division Multiplexing, OFDM, symbols, and when a plurality of OFDM symbols are occupied, the plurality of OFDM symbols are transmitted continuously or discontinuously.