Terminal, network device, and data transmission method in random access process
The present invention relates to wireless communications technologies, and in particular, to a terminal, a network device, and a data transmission method in a random access process, so as to resolve a current problem that a transmission delay is relatively long when a terminal transmits a relatively large data packet in a random access process. In the terminal a processing module, is configured to determine that the terminal transmits data of multiple TTIs to a base station in a current random access process; and a transceiver module is configured to send first indication information to the base station, where the first indication information is used to indicate that the terminal transmits the data of the multiple TTIs in the current random access process. In this way, the terminal can transmit data of multiple TTIs in one random access process.
1. A terminal, comprising:
a processor, configured to determine that data of multiple transmission time intervals (TTIs) is to be transmitted to a base station in a current random access process; and
a transmitter, configured to send first indication information to the base station, wherein the first indication information indicates that data of multiple TTIs is to be transmitted from the terminal to the base station in the current random access process; wherein the first indication information further indicates: the number of TTIs in which data is to be transmitted from the terminal to the base station; or
the terminal needs to transmit data of another TTI in the current random access process after transmitting data of a current TTI; or
data of a current TTI is the last data to be transmitted by the terminal in the current random access process.
2. The terminal according to claim 1 , wherein the first indication information further indicates the number of TTIs in which data is to be transmitted from the terminal to the base station, and wherein the first indication information comprises first sub information and second sub information;
wherein the first sub information indicates a quantity M of data packets to be transmitted by the terminal to the base station in the current random access process;
wherein the second sub information indicates a quantity N of times of repeatedly transmitting each data packet to be transmitted by the terminal to the base station in the current random access process; and
wherein M*N is equal to the number of TTIs in which data is to be transmitted from the terminal to the base station.
3. The terminal according to claim 1 , wherein the terminal further comprises:
a receiver, configured to receive third indication information from a radio network controller (RNC), wherein the third indication information indicates that the terminal is allowed to transmit data of multiple TTIs to the base station in the current random access process.
4. The terminal according to claim 3 , wherein the third indication information comprises:
a maximum quantity of TTIs in which the terminal is allowed to transmit data to the base station in one random access process;
indication information indicating that the terminal is allowed to transmit data of multiple TTIs to the base station in one random access process;
a data volume threshold;
information about a physical resource that is available when the terminal needs to send data of multiple TTIs to the base station in one random access process; and/or
a correspondence between information about a physical resource to be used by the terminal to send an access preamble and a quantity of TTIs in which data is to be transmitted by the terminal to the base station in one random access process.
5. The terminal according to claim 4 , wherein the determination to transmit data of multiple TTIs to the base station in the current random access process is based on one or more of the following conditions being met:
an amount of data buffered in the terminal being greater than or equal to the data volume threshold;
a path loss from the terminal to the base station being less than or equal to a preset path loss threshold;
load of a cell in which the terminal is located being less than or equal to a preset cell load threshold.
6. A base station, comprising:
a receiver, configured to receive first indication information from a terminal, wherein the first indication information indicates to the base station that data of multiple transmission time intervals (TTIs) is to be transmitted from the terminal to the base station in one random access process; and
a processor, configured to determine, according to the first indication information, that data of multiple transmission time intervals (TTIs) is to be transmitted from the terminal to the base station in a current random access process; wherein the first indication information further indicates:
the number of TTIs in which data is to be transmitted from the terminal to the base station; or
the terminal needs to transmit data of another TTI in the current random access process after transmitting data of a current TTI; or
data of a current TTI is the last data to be transmitted by the terminal in the current random access process.
7. The base station according to claim 6 , wherein the first indication information further indicates the number of TTIs in which data is to be transmitted from the terminal to the base station, and wherein the first indication information comprises first sub information and second sub information;
wherein the first sub information indicates a quantity M of data packets to be transmitted by the terminal to the base station in the current random access process;
wherein the second sub information indicates a quantity N of times of repeatedly transmitting each data packet to be transmitted by the terminal to the base station in the current random access process; and
wherein M*N is equal to the number of TTIs in which data is to be transmitted from the terminal to the base station.
8. A radio network controller (RNC), comprising:
a processor, configured to determine to allow a terminal to transmit data of multiple transmission time intervals (TTIs) to a base station in one random access process; and
a transmitter, configured to send third indication information to the terminal, wherein the third indication information indicates that the terminal is allowed to transmit data of multiple TTIs to the base station in a current random access process; wherein the third indication information comprises:
a maximum quantity of TTIs in which the terminal is allowed to transmit data to the base station in one random access process;
indication information indicating that the terminal is allowed to transmit data of multiple TTIs to the base station in one random access process;
a data volume threshold;
a correspondence between information about a physical resource to be used by the terminal to send an access preamble and a quantity of TTIs in which data is to be transmitted by the terminal to the base station in one random access process; and/or
information about a physical resource that is available when the terminal needs to send data of multiple TTIs to the base station in one random access process.
9. A data transmission method in a random access process, comprising:
determining, by a terminal, to transmit data of multiple transmission time intervals (TTIs) to a base station in a current random access process; and
sending, by the terminal, first indication information to the base station, wherein the first indication information indicates that data of multiple TTIs is to be transmitted from the terminal to the base station in the current random access process; wherein the first indication information further indicates: the number of TTIs in which data is to be transmitted from the terminal to the base station; or
the terminal needs to transmit data of another TTI in the current random access process after transmitting data of a current TTI; or
data of a current TTI is the last data to be transmitted by the terminal in the current random access process.
10. The method according to claim 9 , wherein the first indication information further indicates the number of TTIs in which data is to be transmitted from the terminal to the base station, and wherein the first indication information comprises first sub information and second sub information;
wherein the first sub information indicates a quantity M of data packets to be transmitted by the terminal to the base station in the current random access process;
wherein the second sub information indicates a quantity N of times of repeatedly transmitting each data packet to be transmitted by the terminal to the base station in the current random access process; and
wherein M*N is equal to the number of TTIs in which data is to be transmitted from the terminal to the base station.
11. The method according to claim 9 , wherein before sending the first indication information to the base station, the method further comprises:
receiving, by the terminal, third indication information from a radio network controller (RNC), wherein the third indication information indicates that the terminal is allowed to transmit data of multiple TTIs to the base station in the current random access process.
12. The method according to claim 11 , wherein the third indication information comprises:
a maximum quantity of TTIs in which the terminal is allowed to transmit data to the base station in one random access process;
indication information indicating that the terminal is allowed to transmit data of multiple TTIs to the base station in one random access process;
a data volume threshold;
information about a physical resource that is available when the terminal needs to send data of multiple TTIs to the base station in one random access process; and/or
a correspondence between information about a physical resource to be used by the terminal to send an access preamble and a quantity of TTIs in which data is to be transmitted by the terminal to the base station in one random access process.
13. The method according to claim 12 , wherein determining to transmit data of multiple TTIs to the base station in the current random access process is based on one or more of the following conditions being met:
an amount of data buffered in the terminal being greater than or equal to the data volume threshold;
a path loss from the terminal to the base station being less than or equal to a preset path loss threshold;
load of a cell in which the terminal is located being less than or equal to a preset cell load threshold.
14. A data transmission method, comprising:
receiving, by a base station, first indication information from a terminal, wherein the first indication information indicates that data of multiple transmission time intervals (TTIs) is to be transmitted from the terminal to the base station in one random access process; and
determining, by the base station according to the first indication information, that data of multiple TTIs is to be transmitted from the terminal to the base station in a current random access process; wherein the first indication information further indicates: the number of TTIs in which data is to be transmitted from the terminal to the base station; or
the terminal needs to transmit data of another TTI in the current random access process after transmitting data of a current TTI; or
data of a current TTI is the last data to be transmitted by the terminal in the current random access process.
15. The method according to claim 14 , wherein the first indication information further indicates the number of TTIs in which data is to be transmitted from the terminal to the base station, and wherein the first indication information comprises first sub information and second sub information;
wherein the first sub information indicates a quantity M of data packets to be transmitted by the terminal to the base station in the current random access process;
wherein the second sub information indicates a quantity N of times of repeatedly transmitting each data packet to be transmitted by the terminal to the base station in the current random access process; and
wherein M*N is equal to the number of TTIs in which data is to be transmitted from the terminal to the base station.