SCHEDULING METHOD, DATA TRANSMISSION METHOD, AND APPARATUS

• US 20180332610A1
• Filed: 07/06/2018
• Published: 11/15/2018
• Est. Priority Date: 01/08/2016
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: XIA, Jinhuan
• Granted Patent: US 10,631,326 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

Embodiments of the present invention provide a scheduling method, a data transmission method, and an apparatus, and relate to the field of communications technologies, so as to resolve a problem that an existing LTE system does not support a new type of terminal. The scheduling method includes: sending, by a base station, downlink control information DCI to a first-type terminal, where the DCI includes scheduling information used to instruct the first-type terminal to send uplink data by using a first-mode frame format; the first-mode frame format includes at least one uplink subframe, and each uplink subframe includes at least one first-mode frame format symbol; and duration of the first-mode frame format symbol is at least four times of duration of a second-mode frame format symbol, and the second-mode frame format symbol is a single carrier frequency division multiple access SC-FDMA symbol in an LTE system.

Claims

1. A scheduling method, applied to a communications system, the method comprising:

sending, by a base station, downlink control information (DCI) to a first-type terminal, wherein the DCI comprises scheduling information used to instruct the first-type terminal to send uplink data using a first-mode frame format, wherein

the first-mode frame format comprises at least one uplink subframe, and each uplink subframe comprises at least one first-mode frame format symbol; and

the duration of the first-mode frame format symbol is at least four times of the duration of a second-mode frame format symbol, and the second-mode frame format symbol is a single carrier frequency division multiple access (SC-FDMA) symbol in an LTE system.

2. The method according to claim 1, wherein when the communications system is a frequency division duplex (FDD) system, and uses a normal cyclic prefix (CP) in uplink, if the duration of the uplink subframe is 1 millisecond, the uplink subframe comprises three first-mode frame format symbols, and the duration of the three first-mode frame format symbols is equal to the duration of 12 second-mode frame format symbols and less than 1 millisecond;

or

when the communications system is an FDD system, and uses an extended CP in uplink, if the duration of the uplink subframe is 1 millisecond, the uplink subframe comprises three first-mode frame format symbols, and the duration of the three first-mode frame format symbols is equal to duration of 12 second-mode frame format symbols and equal to 1 millisecond.

3. The method according to claim 1, wherein when the communications system is an FDD system, a time length of the first-mode frame format is N*10 milliseconds, wherein N is 1 or is an even number greater than 0, and the duration of the at least one uplink subframe in the first-mode frame format is M milliseconds, wherein M is an even number greater than 0, and W=N*10;

and

when the duration of the uplink subframe in the first-mode frame format is 2 milliseconds, and the communications system uses a normal CP in uplink, the uplink subframe comprises seven first-mode frame format symbols, and the duration of the seven first-mode frame format symbols is equal to duration of 28 second-mode frame format symbols and equal to 2 milliseconds;

or

when the duration of the uplink subframe in the first-mode frame format is 2 milliseconds, and the communications system uses an extended CP in uplink, the uplink subframe comprises six first-mode frame format symbols, and the duration of the six first-mode frame format symbols is equal to duration of 24 second-mode frame format symbols and equal to 2 milliseconds.

4. The method according to claim 1, wherein when the communications system is a time division duplex (TDD) system, the first-mode frame format further comprises at least one special subframe and at least one downlink subframe, wherein the special subframe comprises at least one of a downlink pilot timeslot (DwPTS), an uplink pilot timeslot (UpPTS), or a guard period (GP).

5. The method according to claim 4, wherein when the communications system is the TDD system, each uplink subframe comprises the at least one first-mode frame format symbol, and a time length of each special subframe is 1 millisecond;

and

when the communications system uses a normal CP in uplink, and the duration of the uplink subframe is 1 millisecond, the uplink subframe comprises three first-mode frame format symbols, and the duration of the three first-mode frame format symbols is equal to duration of 12 second-mode frame format symbols and less than 1 millisecond;

or

when the communications system uses an extended CP in uplink, and the duration of the uplink subframe is 1 millisecond, the uplink subframe comprises three first-mode frame format symbols, and the duration of the three first-mode frame format symbols is equal to duration of 12 second-mode frame format symbols and equal to 1 millisecond.

6. The method according to claim 1, wherein an uplink demodulation reference signal is sent on the at least one first-mode frame format symbol in the at least one uplink subframe.

7. The method according to claim 1, wherein the method further comprises:

sending, by the base station, DCI to a second-type terminal or a third-type terminal, wherein the DCI comprises scheduling information used to instruct the second-type terminal or the third-type terminal to send uplink data by using a second-mode frame format, wherein

the second-mode frame format comprises a frame structure type 1 applicable to the FDD system and the frame structure type 2 applicable to the TDD system, the second-mode frame format comprises 10 subframes, a length of each subframe is 1 millisecond, and a spacing between subcarriers in physical resource information corresponding to the second-mode frame format is 15 kHz.

8. The method according to claim 1, wherein when a terminal is the first-type terminal, the scheduling information comprises physical resource information used when the uplink data is sent by using the first-mode frame format, the physical resource information comprises a time resource and a frequency resource, the time resource comprises at least one uplink subframe, and the frequency resource comprises one subcarrier;

or

when the terminal is the second-type terminal or the third-type terminal, the scheduling information comprises physical resource information used when the uplink data is sent by using the second-mode frame format, the physical resource information comprises a time resource and a frequency resource, the time resource comprises at least one uplink subframe, and the frequency resource comprises one or more subcarriers.

9. A data transmission method, wherein the method comprises:

sending, by a terminal, uplink control information or random access information to a base station, wherein the terminal is a first-type terminal, and a frame format used to send the uplink control information or the random access information is a first-mode frame format, wherein

the first-mode frame format comprises at least one uplink subframe, and each uplink subframe comprises at least one first-mode frame format symbol; and

the duration of the first-mode frame format symbol is at least four times of duration of a second-mode frame format symbol, and the second-mode frame format symbol is a single carrier frequency division multiple access (SC-FDMA) symbol in an LTE system.

10. The method according to claim 9, wherein, before the sending, by a terminal, uplink control information to a base station, the method further comprises:

receiving, by the terminal, downlink control information (DCI) sent by the base station, wherein the DCI comprises scheduling information used to instruct the first-type terminal to send uplink data by using the first-mode frame format.

11. The method according to claim 9, wherein when a communications system is a FDD system, and uses a normal cyclic prefix (CP) in uplink, if the duration of the uplink subframe is 1 millisecond, the uplink subframe comprises three first-mode frame format symbols, and the duration of the three first-mode frame format symbols is equal to the duration of 12 second-mode frame format symbols and less than 1 millisecond;

or

when the communications system is an FDD system, and uses an extended CP in uplink, if the duration of the uplink subframe is 1 millisecond, the uplink subframe comprises three first-mode frame format symbols, and the duration of the three first-mode frame format symbols is equal to duration of 12 second-mode frame format symbols and equal to 1 millisecond.

12. The method according to claim 9, wherein when the communications system is an FDD system, a time length of the first-mode frame format is N*10 milliseconds, wherein N is 1 or is an even number greater than 0, and the uplink subframe in the first-mode frame format is M milliseconds, wherein M is an even number greater than 0, and W=N*10;

and

When the duration of the uplink subframe in the first-mode frame format is 2 milliseconds, and the communications system uses a normal CP in uplink, the uplink subframe comprises seven first-mode frame format symbols, and duration of the seven first-mode frame format symbols is equal to duration of 28 second-mode frame format symbols and equal to 2 milliseconds;

or

when the duration of the uplink subframe in the first-mode frame format is 2 milliseconds, and the communications system uses an extended CP in uplink, the uplink subframe comprises six first-mode frame format symbols, and duration of the six first-mode frame format symbols is equal to duration of 24 second-mode frame format symbols and equal to 2 milliseconds.

13. The method according to claim 9, wherein when the communications system is a time division duplex (TDD) system, the first-mode frame format further comprises at least one special subframe and at least one downlink subframe, wherein the special subframe comprises at least one of a downlink pilot timeslot (DwPTS), an uplink pilot timeslot (UpPTS), or a guard period (GP).

14. The method according to claim 13, wherein when the communications system is the TDD system, each uplink subframe comprises the at least one first-mode frame format symbol, and a time length of each special subframe is 1 millisecond;

and

when the communications system uses a normal CP in uplink, and the duration of the uplink subframe is 1 millisecond, the uplink subframe comprises three first-mode frame format symbols, and the duration of the three first-mode frame format symbols is equal to duration of 12 second-mode frame format symbols and less than 1 millisecond;

or

when the communications system uses an extended CP in uplink, and the duration of the uplink subframe is 1 millisecond, the uplink subframe comprises three first-mode frame format symbols, and the duration of the three first-mode frame format symbols is equal to duration of 12 second-mode frame format symbols and equal to 1 millisecond.

15. The method according to claim 9, wherein an uplink demodulation reference signal is sent on the at least one first-mode frame format symbol in the at least one uplink subframe.

16. The method according to claim 9, wherein when the terminal is a second-type terminal or a third-type terminal, a frame format used for the uplink control information or the random access information is a second-mode frame format, wherein the second-mode frame format comprises a frame structure type 1 applicable to the FDD system and the frame structure type 2 applicable to the TDD system, the second-mode frame format comprises 10 subframes, a length of each subframe is 1 millisecond, and a spacing between subcarriers in physical resource information corresponding to the second-mode frame format is 15 kHz.

17. The method according to claim 14, wherein, before the sending, by a terminal, uplink control information to a base station, the method further comprises:

receiving, by the terminal, DCI sent by the base station, wherein the DCI comprises scheduling information used to instruct the second-type terminal or the third-type terminal to send uplink data by using the second-mode frame format.

18. The method according to claim 9, wherein when the terminal is the first-type terminal, the scheduling information comprises physical resource information used when the uplink data is sent by using the first-mode frame format, the physical resource information comprises a time resource and a frequency resource, the time resource comprises at least one uplink subframe, and the frequency resource comprises one subcarrier;

or

when the terminal is the second-type terminal or the third-type terminal, the scheduling information comprises physical resource information used when the uplink data is sent by using the second-mode frame format, the physical resource information comprises a time resource and a frequency resource, the time resource comprises at least one uplink subframe, and the frequency resource comprises one or more subcarriers.

19. A base station, wherein the base station comprises a processor, a memory, a system bus, and a communications interface, wherein

the memory is configured to store a computer executable instruction, the processor is connected to the memory by using the system bus, and when the base station runs, the processor executes the computer executable instruction stored in the memory, so that the base station executes the following steps:

sending, by a base station downlink control information (DCI) to a first-type terminal, wherein the DCI comprises scheduling information used to instruct the first-type terminal to send uplink data using a first-mode frame format, wherein

the first-mode frame format comprises at least one uplink subframe, and each uplink subframe comprises at least one first-mode frame format symbol; and

the duration of the first-mode frame format symbol is at least four times of the duration of a second-mode frame format symbol, and the second-mode frame format symbol is a single carrier frequency division multiple access (SC-FDMA) symbol in an LTE system.

20. A terminal, wherein the terminal comprises a processor, a memory, a system bus, and a communications interface, wherein

the memory is configured to store a computer executable instruction, the processor is connected to the memory by using the system bus, and when the terminal runs, the processor executes the computer executable instruction stored in the memory, so that the terminal executes the following steps:

sending, by a terminal, uplink control information or random access information to a base station, wherein the terminal is a first-type terminal, and a frame format used to send the uplink control information or the random access information is a first-mode frame format, wherein

the first-mode frame format comprises at least one uplink subframe, and each uplink subframe comprises at least one first-mode frame format symbol; and

the duration of the first-mode frame format symbol is at least four times of duration of a second-mode frame format symbol, and the second-mode frame format symbol is a single carrier frequency division multiple access (SC-FDMA) symbol in an LTE system.