Method for Sending Control Information, User Equipment, and Base Station

• US 20180027547A1
• Filed: 09/29/2017
• Published: 01/25/2018
• Est. Priority Date: 03/30/2015
• 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: Lyu, Yongxia
• Granted Patent: US 10,517,096 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 1/1829 Arrangements specially adapted for the receiver end
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 2001/125 Arrangements for preventing errors in the return channel
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/54 Signalisation aspects of the TPC commands, e.g. frame structure
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties

Abstract

An embodiment method includes method includes receiving, by a user equipment, a plurality of pieces of first downlink control information sent by a base station, wherein pieces of the plurality of pieces of first downlink control information carry downlink assignment indexes, and wherein at least one piece of the plurality of pieces of first downlink control information further carries a total downlink assignment indexes. The method also includes generating, by the user equipment, a hybrid automatic repeat request response message according to the total downlink assignment indexes, according to the downlink assignment indexes of the pieces of the plurality of pieces of first downlink control information, and according to a physical downlink shared channel corresponding to the pieces of the plurality of pieces of first downlink control information. Additionally, the method includes ending, by the user equipment, the hybrid automatic repeat request response message to the base station.

Claims

1. A user equipment, comprising:

a processor; and

a non-transitory computer readable storage medium storing a program for execution by the processor, the program including instructions to;

receive a plurality of pieces of first downlink control information sent by a base station, wherein pieces of the plurality of pieces of first downlink control information carry a downlink assignment indexes, and wherein at a first piece of the plurality of pieces of the first downlink control information further carries a total downlink assignment index;

generate a hybrid automatic repeat request response message according to the total downlink assignment index, the downlink assignment indexes of the pieces of the plurality of pieces of first downlink control information, and a physical downlink shared channel corresponding the pieces of the plurality of pieces of first downlink control information; and

send the hybrid automatic repeat request response message to the base station; and

wherein the downlink assignment indexes indicate indexes of physical downlink shared channels corresponding to downlink control information carrying the downlink assignment indexes, indicate indexes of a physical downlink control channel indicating downlink semi-persistent scheduling release, or indicate indexes of physical downlink shared channels corresponding to downlink control information carrying the downlink assignment indexes and physical downlink control channels indicating downlink semi-persistent scheduling release; and

wherein the total downlink assignment index is a quantity of physical downlink shared channels corresponding to downlink control information, a quantity of physical downlink control channels indicating downlink semi-persistent scheduling release, or a sum of a quantity of physical downlink shared channels corresponding to downlink control information and a quantity of physical downlink control channels indicating downlink semi-persistent scheduling release.

2. The user equipment according to claim 1, wherein the instructions further comprise instructions to:

separately generate response information for the physical downlink shared channels corresponding to the pieces of the plurality of pieces of first downlink control information, according to whether the physical downlink shared channels corresponding to the pieces of the plurality of pieces of first downlink control information are correctly decoded;

obtain a sorting result by sorting the downlink assignment indexes of the first downlink control information;

determine second downlink control information according to the sorting result and according to the total downlink assignment index;

obtain a downlink assignment index of the second downlink control information, wherein response information for a physical downlink shared channel corresponding to the second downlink control information is a negative acknowledgment (NACK); and

generate the hybrid automatic repeat request response message according to the response information for the physical downlink shared channels corresponding to the pieces of the plurality of pieces of first downlink control information and according to the response information for the physical downlink shared channel corresponding to the second downlink control information;

wherein an arrangement order of the response information for the physical downlink shared channel corresponding to the pieces of first downlink control information and the response information for the physical downlink shared channel corresponding to the second downlink control information is the same as an order of the downlink assignment indexes of the pieces of the plurality of pieces of first downlink control information and the downlink assignment index of the second downlink control information; and

wherein the response information for the physical downlink shared channel corresponding to the pieces of the plurality of pieces of first downlink control information and the response information for the physical downlink shared channel corresponding to the second downlink control information are in the hybrid automatic repeat request response message.

3. The user equipment according to claim 1, wherein the instructions further comprise instructions to:

receive a quantity of configured carriers that is sent by the base station;

send the hybrid automatic repeat request response message to the base station using a physical uplink control channel format 4, in response to the quantity of configured carriers being greater than a first carrier quantity threshold; and

send the hybrid automatic repeat request response message to the base station using a physical uplink control channel format 3, in response to the quantity of configured carriers being less than or equal to a first carrier quantity threshold.

4. The user equipment according to claim 3, wherein the instructions further comprise instructions to:

obtain the total downlink assignment index in transmit power control (TPC) fields in some of the first downlink control information, or obtain a physical uplink control channel format 4 resource indicator in TPC fields in some of the first downlink control information, wherein multiple pieces of the first downlink control information correspond to carriers whose carrier numbers are greater than the first carrier quantity threshold.

5. The user equipment according to claim 4, wherein the instructions further comprise instructions to:

obtain the total downlink assignment index in the TPC fields in the first downlink control information, in response to a carrier number of a carrier corresponding to the first downlink control information being greater than the first carrier quantity threshold, and parity of the carrier number of the carrier corresponding to the first downlink control information being the same as the carrier number of the first carrier quantity threshold; and

obtain the physical uplink control channel format 4 resource indicator in the TPC fields in the first downlink control information, in response to the carrier number of the carrier corresponding to the first downlink control information being greater than the first carrier quantity threshold, and parity of the carrier number of the carrier corresponding to the first downlink control information being different from that of the first carrier quantity threshold.

6. The user equipment according to claim 1, wherein the instructions further comprise instructions to:

obtain a hybrid automatic repeat request response message bit quantity threshold supported on a pre-defined physical uplink control channel;

send the hybrid automatic repeat request response message to the base station using a physical uplink control channel format 4, in response to the total downlink assignment index being greater than the hybrid automatic repeat request response message bit quantity threshold supported on the physical uplink control channel; and

send the hybrid automatic repeat request response message to the base station using a physical uplink control channel format 3, in response to the total downlink assignment index being less than or equal to the hybrid automatic repeat request response message bit quantity threshold supported on the physical uplink control channel.

7. The user equipment according to claim 1, wherein the instructions further comprise instructions to:

set a second threshold;

obtain the downlink assignment indexes of the pieces of the plurality of pieces of first downlink control information; and

obtain the total downlink assignment index in a TPC field in the first downlink control information corresponding to the downlink assignment indexes, in response to a downlink assignment index of the first downlink control information being greater than the second threshold.

8. The user equipment according to claim 1, wherein the instructions further comprise instructions to:

obtain the downlink assignment indexes of the pieces of the plurality of pieces of first downlink control information; and

obtain the total downlink assignment index in a total downlink assignment indexes field in the pieces of the plurality of pieces of first downlink control information.

9. A base station, comprising:

a processor; and

a non-transitory computer readable storage medium storing a program for execution by the processor, the program including instructions to;

send a plurality of pieces of downlink control information to a user equipment, wherein pieces of the plurality of pieces of downlink control information carry downlink assignment indexes, and wherein a first piece of the plurality of pieces of downlink control information further carries a total downlink assignment indexes;

receive a hybrid automatic repeat request response message sent by the user equipment according to the total downlink assignment indexes, according to downlink assignment indexes of the pieces of the plurality of pieces of downlink control information, and according to physical downlink shared channels corresponding to the pieces of the plurality of pieces of downlink control information; and

obtain, according to the hybrid automatic repeat request response message, response information for a physical downlink shared channel corresponding to the pieces of the plurality of pieces of downlink control information; and

wherein the downlink control information comprises first downlink control information and second downlink control information;

wherein the downlink assignment indexes indicate indexes of physical downlink shared channels corresponding to downlink control information carrying the downlink assignment indexes, indicate indexes of physical downlink control channels indicating downlink semi-persistent scheduling release, or indicate indexes of physical downlink shared channels corresponding to downlink control information carrying the downlink assignment indexes and a physical downlink control channel indicating downlink semi-persistent scheduling release; and

wherein the total downlink assignment indexes is a quantity of physical downlink shared channels corresponding to the downlink control information, a quantity of physical downlink control channels indicating downlink semi-persistent scheduling release, or a sum of a quantity of physical downlink shared channels corresponding to the downlink control information and a quantity of physical downlink control channels indicating downlink semi-persistent scheduling release.

10. The base station according to claim 9, wherein downlink assignment indexes of the pieces of the plurality of pieces of downlink control information are separately set in the pieces of the plurality of pieces of downlink control information, and wherein the total downlink assignment indexes is set in a total downlink assignment indexes field in the pieces of the plurality of pieces of downlink control information.

11. The base station according to claim 9, wherein the downlink assignment indexes of the pieces of the plurality of pieces of downlink control information are separately set in the pieces of the plurality of pieces of downlink control information, and wherein the total downlink assignment indexes are set in a total downlink assignment index field in downlink control information carried by a primary component carrier.

12. The base station according to claim 9, wherein the instructions further comprise instructions to:

set a total downlink assignment index in at least one piece of the plurality of pieces of downlink control information;

perform special scrambling processing on a cyclic redundancy check (CRC) code of downlink control information carrying the total downlink assignment index;

obtain the scrambled downlink control information; and

send, to the user equipment, the scrambled downlink control information and the downlink control information on which scrambling processing is not performed; and

wherein both the scrambled downlink control information and the downlink control information on which scrambling processing is not performed carry a downlink assignment index.

13. A method comprising:

receiving, by a user equipment, a plurality of pieces of first downlink control information sent by a base station, wherein pieces of the plurality of pieces of first downlink control information carry downlink assignment indexes, and wherein at least one piece of the plurality of pieces of first downlink control information further carries a total downlink assignment indexes;

generating, by the user equipment, a hybrid automatic repeat request response message according to the total downlink assignment indexes, according to the downlink assignment indexes of the pieces of the plurality of pieces of first downlink control information, and according to a physical downlink shared channel corresponding to the pieces of the plurality of pieces of first downlink control information; and

sending, by the user equipment, the hybrid automatic repeat request response message to the base station; and

wherein the downlink assignment indexes indicate indexes of physical downlink shared channels corresponding to downlink control information carrying the downlink assignment indexes, indicate indexes of a physical downlink control channel indicating downlink semi-persistent scheduling release, or indicate indexes of physical downlink shared channel corresponding to downlink control information carrying the downlink assignment indexes and physical downlink control channels indicating downlink semi-persistent scheduling release; and

wherein the total downlink assignment indexes is a quantity of physical downlink shared channels corresponding to the downlink control information, a quantity of physical downlink control channels indicating downlink semi-persistent scheduling release, or a sum of a quantity of physical downlink shared channels corresponding to the downlink control information and a quantity of physical downlink control channels indicating downlink semi-persistent scheduling release.

14. The method according to claim 13, wherein generating the hybrid automatic repeat request response message comprises:

separately generating response information for the physical downlink shared channel corresponding to the pieces of the plurality of pieces of first downlink control information, according to whether the physical downlink shared channel corresponding to the pieces of the plurality of pieces of first downlink control information are correctly decoded;

obtaining a sorting result by sorting the downlink assignment indexes of the first downlink control information;

determining second downlink control information according to the sorting result and according to a total downlink assignment index;

obtaining a downlink assignment index of the second downlink control information, wherein response information for a physical downlink shared channel corresponding to the second downlink control information is a negative acknowledgment (NACK); and

generating the hybrid automatic repeat request response message according to the response information for the physical downlink shared channel corresponding to the pieces of the plurality of pieces of first downlink control information and according to the response information for the physical downlink shared channel corresponding to the second downlink control information;

wherein an arrangement order of the response information for the physical downlink shared channel corresponding to the pieces of the plurality of pieces of first downlink control information and according to the response information for the physical downlink shared channel corresponding to the second downlink control information is the same as an order of the downlink assignment indexes of pieces of the plurality of pieces of first downlink control information and the downlink assignment index of the second downlink control information; and

wherein the response information for the physical downlink shared channel corresponding to the pieces of the plurality of pieces of first downlink control information and the response information for the physical downlink shared channel corresponding to the second downlink control information are in the hybrid automatic repeat request response message.

15. The method according to claim 13, wherein receiving the plurality of pieces of first downlink control information comprises:

setting a first carrier quantity threshold;

receiving the plurality of pieces of first downlink control information sent by the base station;

obtaining the downlink assignment indexes of the pieces of the plurality of pieces of first downlink control information; and

obtaining a total downlink assignment index in a transmit power control (TPC) field in the first downlink control information, wherein a carrier number of a carrier corresponding to the first downlink control information is greater than a first carrier quantity threshold.

16. A method comprising:

sending, by a base station, a plurality of pieces of downlink control information to a user equipment, wherein pieces of the plurality of pieces of downlink control information carry downlink assignment indexes, and wherein at least one piece of the plurality of pieces of downlink control information further carries a total downlink assignment index;

receiving, by the base station, a hybrid automatic repeat request response message sent by the user equipment, according to the total downlink assignment index, according to a downlink assignment index of the pieces of the plurality of pieces of downlink control information, and according to a physical downlink shared channel corresponding to the pieces of the plurality of pieces of downlink control information; and

obtaining, by the base station, according to the hybrid automatic repeat request response message, response information for physical downlink shared channels corresponding to the pieces of the plurality of pieces of downlink control information;

wherein the downlink control information comprises first downlink control information and second downlink control information;

wherein the downlink assignment indexes indicate indexes of physical downlink shared channels corresponding to downlink control information carrying the downlink assignment index, indicate indexes of physical downlink control channels indicating downlink semi-persistent scheduling release, or indicate indexes of physical downlink shared channels corresponding to downlink control information carrying the downlink assignment indexes and a physical downlink control channel indicating downlink semi-persistent scheduling release; and

wherein the total downlink assignment index is a quantity of physical downlink shared channels corresponding to the downlink control information, a quantity of physical downlink control channels indicating downlink semi-persistent scheduling release, or a sum of a quantity of physical downlink shared channels corresponding to the downlink control information and a quantity of physical downlink control channels indicating downlink semi-persistent scheduling release.

17. The method according to claim 16, further comprising:

separately setting the downlink assignment indexes of the pieces of the plurality of pieces of downlink control information in the pieces of the plurality of pieces of downlink control information; and

setting the total downlink assignment index in total downlink assignment index fields in the pieces of the plurality of pieces of downlink control information.

18. The method according to claim 16, further comprising:

separately setting the downlink assignment index of the pieces of the plurality of pieces of downlink control information in the pieces of the plurality of pieces of downlink control information; and

setting the total downlink assignment index in a total downlink assignment index field in downlink control information carried by a primary component carrier.

19. The method according to claim 16, wherein sending the plurality of pieces of downlink control information comprises:

setting the total downlink assignment index in at least one piece of the plurality of pieces of downlink control information, and performing special scrambling processing on a cyclic redundancy check (CRC) code of downlink control information carrying the total downlink assignment index, to obtain the scrambled downlink control information; and

sending, to the user equipment, the scrambled downlink control information and downlink control information on which scrambling processing is not performed, wherein both the scrambled downlink control information and the downlink control information on which scrambling processing is not performed carry a downlink assignment index.