Data transmission method, device, and system
A data transmission method, device, and system are provided. The method includes: sending, by a base station, an NPSS to UE by using a first subframe in a first radio frame and a first subframe in a second radio frame, where the first radio frame and the second radio frame are consecutive, and both the first radio frame and the second radio frame use a TDD uplink-downlink subframe configuration; sending, by the base station, an NPBCH to the UE by using a second subframe in the first radio frame and a second subframe in the second radio frame; sending, by the base station, an NSSS to the UE by using a third subframe in the first radio frame; and sending, by the base station, a SIB1-NB to the UE by using a third subframe in the second radio frame.
1. A data transmission method, comprising:
sending, by a base station, a narrowband primary synchronization signal (NPSS) to user equipment (UE) using a first subframe in a first radio frame and a first subframe in a second radio frame, wherein the first radio frame and the second radio frame are consecutive, and both the first radio frame and the second radio frame use a time division duplex (TDD) uplink-downlink subframe configuration;
sending, by the base station, a narrowband physical broadcast channel (NPBCH) to the UE using a second subframe in the first radio frame and a second subframe in the second radio frame;
sending, by the base station, a narrowband secondary synchronization signal (NSSS) to the UE using a third subframe in the first radio frame; and
sending, by the base station, a system information block Type1-NB (SIB1-NB) to the UE by using a third subframe in the second radio frame.
2. The method according to claim 1 , wherein in the first radio frame and the second radio frame, the first subframe, the second subframe, and the third subframe each are a downlink subframe.
3. The method according to claim 1 , wherein
in the first radio frame and the second radio frame, the first subframe and the third subframe each are a downlink subframe, the second subframe in the first radio frame comprises two special subframes in the first radio frame, and the second subframe in the second radio frame comprises two special subframes in the second radio frame.
4. The method according to claim 2 , wherein
the first subframe is a subframe 5, the second subframe is a subframe 9, and the third subframe is a subframe 0.
5. The method according to claim 1 , wherein in response to that the first subframe and the third subframe in the first radio frame are not a combination of a subframe 5 and a subframe 9, the first subframe and the third subframe in the first radio frame are separated by a subframes, wherein a is a natural number, a is not equal to 3 and is less than 9, and that the first subframe and the third subframe in the first radio frame are separated by the a subframes indicates that both the first radio frame and the second radio frame use the TDD uplink-downlink subframe configuration.
6. The method according to claim 1 , wherein the NPSS comprises first indication information, and the first indication information indicates that both the first radio frame and the second radio frame use the TDD uplink-downlink subframe configuration.
7. The method according to claim 1 , wherein the second subframe in the first radio frame comprises a special subframe and a downlink subframe in the first radio frame, and the second subframe in the second radio frame comprises a special subframe and a downlink subframe in the second radio frame.
8. The method according to claim 1 , wherein a signal format of the NPSS is a first signal format, and the first signal format indicates that both the first radio frame and the second radio frame use the TDD uplink-downlink subframe configuration.
9. A data transmission method, comprising:
receiving, by user equipment UE in a first subframe in a first radio frame and a first subframe in a second radio frame, a narrowband primary synchronization signal (NPSS) from a base station, wherein the first radio frame and the second radio frame are consecutive;
receiving, by the UE in a second subframe in the first radio frame and a second subframe in the second radio frame, a narrowband physical broadcast channel (NPBCH) from the base station;
receiving, by the UE in a third subframe in the first radio frame, a narrowband secondary synchronization signal (NSSS) from the base station;
receiving, by the UE in a third subframe in the second radio frame, a system information block Type1-NB (SIB1-NB) from the base station; and
in response to that the first subframe and the third subframe in the first radio frame are separated by a subframes, determining, by the UE, that both the first radio frame and the second radio frame use a time division duplex (TDD) uplink-downlink subframe configuration, wherein a is a natural number, a is not equal to 3 and is less than 9.
10. The method according to claim 9 , wherein
the first subframe is a subframe 5, the second subframe is a subframe 9, and the third subframe is a subframe 0.
11. An apparatus, comprising:
at least one processor coupled to a non-transitory memory and configured to execute instructions stored in the non-transitory memory, wherein the instructions cause the apparatus to:
receive, in a first subframe in a first radio frame and a first subframe in a second radio frame, a narrowband primary synchronization signal (NPSS) from a base station, wherein the first radio frame and the second radio frame are consecutive;
receive, in a second subframe in the first radio frame and a second subframe in the second radio frame, a narrowband physical broadcast channel (NPBCH) from the base station;
receive, in a third subframe in the first radio frame, a narrowband secondary synchronization signal (NSSS) from the base station;
receive, in a third subframe in the second radio frame, a system information block Type1-NB (SIB1-NB) from the base station; and
in response to that the first subframe and the third subframe in the first radio frame are separated by a subframes, determine that both the first radio frame and the second radio frame use a time division duplex (TDD) uplink-downlink subframe configuration, wherein a is a natural number, a is not equal to 3 and is less than 9.
12. The apparatus according to claim 11 , wherein
the first subframe is a subframe 5, the second subframe is a subframe 9, and the third subframe is a subframe 0.
13. The apparatus according to claim 11 , wherein the apparatus is user equipment.
14. An apparatus, comprising:
at least one processor coupled to a non-transitory memory and configured to execute instructions stored in the non-transitory memory, wherein the instructions cause the apparatus to:
send a narrowband primary synchronization signal (NPSS) to user equipment (UE) using a first subframe in a first radio frame and a first subframe in a second radio frame, wherein the first radio frame and the second radio frame are consecutive, and both the first radio frame and the second radio frame use a time division duplex (TDD) uplink-downlink subframe configuration;
send a narrowband physical broadcast channel (NPBCH) to the UE using a second subframe in the first radio frame and a second subframe in the second radio frame;
send a narrowband secondary synchronization signal (NSSS) to the UE using a third subframe in the first radio frame; and
send a system information block Type1-NB (SIB1-NB) to the UE by using a third subframe in the second radio frame.
15. The apparatus according to claim 14 , wherein
the first subframe is a subframe 5, the second subframe is a subframe 9, and the third subframe is a subframe 0.
16. The apparatus according to claim 14 , wherein the apparatus is a base station.