System information sending method and apparatus
A system information sending method and an apparatus. The method includes receiving, by a base station, at least one first uplink trigger signal in a first time-frequency resource group in a first radio frame, determining, based on a time-frequency resource of the at least one first uplink trigger signal, a time-frequency resource used for sending first system information, where a start location of the time-frequency resource of the first system information in time domain has a first time offset relative to a frame header location of a radio frame in which the first system information is located, and sending the first system information on the time-frequency resource of the first system information.
1. A system information receiving method, comprising:
receiving, by a terminal device, first indication information from a network device, wherein the first indication information indicates trigger signal sequence information and a trigger signal time-frequency resource;
receiving, by the terminal device, second indication information from the network device, wherein the second indication information indicates a subframe type;
determining, by the terminal device, sequence information of an uplink trigger signal and a time-frequency resource of the uplink trigger signal according to the first indication information and the second indication information;
generating, by the terminal device, the uplink trigger signal according to the sequence information of the uplink trigger signal;
sending, by the terminal device, the uplink trigger signal on the time-frequency resource of the uplink trigger signal;
determining, by the terminal device, based on the time-frequency resource of the uplink trigger signal, a time-frequency resource group of system information; and
receiving, by the terminal device, the system information in the time-frequency resource group of the system information.
2. The method according to claim 1 , wherein receiving the system information in the time-frequency resource group comprises:
detecting, by the terminal device, the system information in the time-frequency resource group; and
receiving the system information in the time-frequency resource group in response to the system information being detected; and
wherein the method further comprises:
resending the uplink trigger signal, in response to the system information not being detected.
3. The method according to claim 1 ,
wherein a time-domain resource of the time-frequency resource group of the system information is a time interval corresponding to the time-frequency resource of the uplink trigger signal.
4. A system information receiving apparatus, comprising:
a processor; and
a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
receive first indication information from a network device, wherein the first indication information indicates trigger signal sequence information and a trigger signal time-frequency resource;
receive second indication information from the network device, wherein the second indication information indicates a subframe type;
determine sequence information of an uplink trigger signal and a time-frequency resource of the uplink trigger signal according to the first indication information and the second indication information;
generate the uplink trigger signal according to the sequence information of the uplink trigger signal;
send the uplink trigger signal on the time-frequency resource of the uplink trigger signal;
determine, based on the time-frequency resource of the uplink trigger signal, a time-frequency resource group of system information; and
receive the system information in the time-frequency resource group of the system information.
5. The apparatus according to claim 4 , wherein the instructions to receive the system information in the time-frequency resource group include instructions to:
detect the system information in the time-frequency resource group; and
receive the system information in the time-frequency resource group in response to the system information being detected; and
wherein the program further includes instructions to:
resend the uplink trigger signal in response to the system information not being detected.
6. The apparatus according to claim 4 , wherein a time-domain resource of the time-frequency resource group of the system information is a time interval corresponding to the time-frequency resource of the uplink trigger signal.
7. The method according to claim 1 , wherein resending the uplink trigger signal comprises:
performing at least one of changing a format of the uplink trigger signal or increasing transmit power; and
resending the uplink trigger signal based on at least one the changed format or the increased transmit power.
8. The apparatus according to claim 4 , wherein instructions to resend the uplink trigger signal include instructions to:
perform at least one of changing a format of the uplink trigger signal or increasing transmit power; and
resend the uplink trigger signal based on at least one the changed format or the increased transmit power.
9. A system information sending method, comprising:
sending, by a network device, first indication information to a terminal device, wherein the first indication information indicates trigger signal sequence information and a trigger signal time-frequency resource;
sending, by the network device, second indication information to the terminal device, wherein the second indication information indicates a subframe type;
receiving, by the network device, an uplink trigger signal on a time-frequency resource of the uplink trigger signal;
determining, by the network device, based on the time-frequency resource of the uplink trigger signal and the subframe type, a time-frequency resource group of system information; and
sending, by the network device, the system information in the time-frequency resource group of the system information.
10. The method according to claim 9 ,
wherein a time-domain resource of the time-frequency resource group of the system information is a time interval corresponding to the time-frequency resource of the uplink trigger signal.
11. A system information receiving apparatus, comprising:
a processor; and
a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
send first indication information to a terminal device, wherein the first indication information indicates trigger signal sequence information and trigger signal time-frequency resource;
send second indication information to the terminal device, wherein the second indication information indicates a subframe type;
receive an uplink trigger signal on a time-frequency resource of the uplink trigger signal;
determine, based on the time-frequency resource of the uplink trigger signal and the subframe type, a time-frequency resource group of system information; and
send the system information in the time-frequency resource group of the system information.
12. The apparatus according to claim 11 , wherein a time-domain resource of the time-frequency resource group of the system information is a time interval corresponding to the time-frequency resource of the uplink trigger signal.