METHOD, APPARATUS, AND SYSTEM FOR TRANSMITTING DATA

• US 20140029552A1
• Filed: 10/01/2013
• Published: 01/30/2014
• Est. Priority Date: 04/01/2011
• 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: LV, Yongxia, Li, Chaojun
• Granted Patent: US 9,871,645 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided

Abstract

Embodiments of the present invention disclose a method, an apparatus, and a system for transmitting data and relate to the communications field. In order to enable more flexible configuration of flexible subframes and increase downlink throughput, a technical solution provided in the present invention is as follows: configuring an HARQ synchronization attribute of a data packet, where the HARQ synchronization attribute includes synchronous HARQ or asynchronous HARQ; configuring an HARQ process ID of the data packet when the HARQ synchronization attribute is configured to asynchronous HARQ; and sending downlink control information for scheduling the data packet to a user equipment.

Claims

1. A method for transmitting data, comprising:

configuring a hybrid automatic repeat request HARQ synchronization attribute of a data packet, wherein the HARQ synchronization attribute comprises synchronous HARQ or asynchronous HARQ, and configuring an HARQ process ID of the data packet when the HARQ synchronization attribute of the data packet is configured to asynchronous HARQ; and

sending downlink control information for scheduling the data packet to a user equipment.

2. The method for transmitting data according to claim 1, wherein the configuring an HARQ synchronization attribute of a data packet comprises:

presetting the HARQ synchronization attribute of the data packet to synchronous HARQ when an initially transmitted packet of the data packet is transmitted in a fixed uplink subframe, and presetting the HARQ synchronization attribute of the data packet to asynchronous HARQ when an initially transmitted packet of the data packet is transmitted in a flexible subframe that serves as an uplink subframe;

or

presetting the HARQ synchronization attribute of the data packet to asynchronous HARQ in all circumstances.

3. The method for transmitting data according to claim 1, wherein the configuring an HARQ synchronization attribute of a data packet comprises:

sending signaling that carries the HARQ synchronization attribute of the data packet to the user equipment, wherein the signaling comprises radio resource control signaling or downlink control information.

4. The method for transmitting data according to claim 1, further comprising:

configuring an HARQ adaptability attribute of the data packet, wherein the HARQ adaptability attribute comprises adaptive HARQ, non-adaptive HARQ, or semi-adaptive HARQ.

5. The method for transmitting data according to claim 4, wherein the configuring an HARQ adaptability attribute of the data packet comprises:

configuring the HARQ adaptability attribute of the data packet to adaptive HARQ or non-adaptive HARQ when the HARQ synchronization attribute of the data packet is configured to synchronous HARQ; and

configuring the HARQ adaptability attribute of the data packet to adaptive HARQ or semi-adaptive HARQ when the HARQ synchronization attribute of the data packet is configured to asynchronous HARQ.

6. The method for transmitting data according to claim 5, wherein, when the HARQ adaptability attribute of the data packet is configured to semi-adaptive, first scheduling information indicating a retransmitted packet of the data packet is preset to be consistent with first scheduling information indicating an initially transmitted packet of the data packet, or determined according to a predefined rule, wherein,

the first scheduling information comprises at least one type of scheduling information in modulation and coding scheme MCS, transmit power control TPC, and demodulation reference signal cyclic shift.

7. The method for transmitting data according to claim 5, wherein the configuring an HARQ process ID of the data packet comprises:

presetting a mapping relationship between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of uplink subframes;

or

presetting a mapping relationship between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of flexible subframes;

or

indicating the HARQ process ID of the initially transmitted packet of the data packet by using downlink control information.

8. The method for transmitting data according to claim 7, wherein the configuring an HARQ adaptability attribute of the data packet comprises:

configuring a retransmitted packet of the data packet to semi-adaptive HARQ when a mapping relationship between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of uplink subframes is preset or a mapping relationship between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of flexible subframes is preset;

or

configuring the HARQ adaptability attribute of a retransmitted packet of the data packet to semi-adaptive HARQ when the HARQ process ID of an initially transmitted packet of the data packet is indicated by using downlink control information.

9. The method for transmitting data according to claim 1, wherein, before the configuring an HARQ process ID of the data packet, the method further comprises:

presetting the numbers of added HARQ processes corresponding to different uplink-downlink subframe configurations;

or

determining the number of added HARQ processes according to the number of flexible subframes;

or

notifying the user equipment of the number of added HARQ processes by using high layer signaling.

10. The method for transmitting data according to claim 1, wherein:

one bit in a downlink assignment index field of the downlink control information is used to indicate the HARQ synchronization attribute of the data packet;

or

one state of a downlink assignment index field of the downlink control information is used to indicate that the scheduled data packet uses synchronous HARQ and another state is used to indicate that the scheduled data packet uses asynchronous HARQ;

or

N states of a downlink assignment index field of the downlink control information are used to indicate that the scheduled data packet uses synchronous HARQ and the remaining 4-N states are used to indicate that the scheduled data packet uses asynchronous HARQ, wherein N is an integer above 0 and below 4;

or

N states of a downlink assignment index field of the downlink control information are used to indicate that the scheduled data packet uses synchronous HARQ and the remaining 4-N states are used to indicate that the scheduled data packet uses asynchronous HARQ, wherein different states of the remaining 4-N states indicate subframe IDs of subframes where the scheduled data packet that uses asynchronous HARQ resides and N is an integer above 0 and below 4.

11. A method for transmitting data, comprising:

receiving downlink control information sent by a base station for scheduling a data packet;

determining an HARQ synchronization attribute of the data packet according to the downlink control information, wherein the HARQ synchronization attribute comprises synchronous HARQ or asynchronous HARQ; and

determining an HARQ process ID of the data packet according to the downlink control information when the HARQ synchronization attribute of the data packet is configured to asynchronous HARQ.

12. The method for transmitting data according to claim 11, wherein, before the receiving downlink control information sent by a base station for scheduling a data packet, the method further comprises:

receiving flexible subframe configuration information sent by the base station, wherein the flexible subframe configuration information comprises subframe ID information of a flexible subframe and at least one type of information in attribute information; and

determining a flexible subframe configuration according to the flexible subframe configuration information.

13. The method for transmitting data according to claim 11, further comprising:

determining an HARQ adaptability attribute of the data packet according to the downlink control information, wherein the HARQ adaptability attribute comprises adaptive HARQ, non-adaptive HARQ, or semi-adaptive HARQ.

14. The method for transmitting data according to claim 11, wherein the determining an HARQ synchronization attribute of the data packet according to the downlink control information comprises:

determining that the HARQ synchronization attribute of the data packet is synchronous HARQ when an initially transmitted packet of the data packet is transmitted in a fixed uplink subframe, and determining that the HARQ synchronization attribute of the data packet is asynchronous HARQ when an initially transmitted packet of the data packet is transmitted in a flexible subframe that serves as an uplink subframe;

or

determining that the HARQ synchronization attribute of the data packet is asynchronous HARQ in all circumstances;

or

determining the HARQ synchronization attribute of the data packet according to a downlink assignment index field in the downlink control information.

15. The method for transmitting data according to claim 11, wherein, the method further comprises:

receiving radio resource control signaling sent by the base station, wherein the radio resource control signaling carries the HARQ synchronization attribute of the data packet; and

the determining an HARQ synchronization attribute of the data packet according to the downlink control information comprises;

determining the HARQ synchronization attribute of the data packet according to the downlink control information and the radio resource control signaling.

16. The method for transmitting data according to claim 11, wherein the determining an HARQ process ID of the data packet according to the downlink control information comprises:

after receiving the downlink control information, if a mapping relationship is preset between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of uplink subframes, determining the HARQ process ID of the data packet according to the mapping relationship;

or

after receiving the downlink control information, if a mapping relationship is preset between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of flexible subframes, determining the HARQ process ID of the data packet according to the mapping relationship;

or

after receiving the downlink control information, if an HARQ adaptability attribute of a retransmitted packet of the data packet is determined to be semi-adaptive HARQ, determining the HARQ process ID of the data packet according to an idle bit of the downlink control information.

17. A base station, comprising:

an attribute configuring unit, configured to configure an HARQ synchronization attribute of a data packet, wherein the HARQ synchronization attribute comprises synchronous HARQ or asynchronous HARQ;

a process configuring unit, configured to configure an HARQ process ID of the data packet when the HARQ synchronization attribute of the data packet is configured to asynchronous HARQ; and

a control information sending unit, configured to send downlink control information for scheduling the data packet to a user equipment.

18. The base station according to claim 17, wherein the attribute configuring unit is specifically configured to preset the HARQ synchronization attribute of the data packet to synchronous HARQ when an initially transmitted packet of the data packet is transmitted in a fixed uplink subframe, and preset the HARQ synchronization attribute of the data packet to asynchronous HARQ when an initially transmitted packet of the data packet is transmitted in a flexible subframe that serves as an uplink subframe;

or preset the HARQ synchronization attribute of the data packet to asynchronous HARQ in all circumstances.

19. The base station according to claim 17, wherein the attribute configuring unit comprises:

an information sending subunit, configured to send signaling that carries the HARQ synchronization attribute of the data packet to the user equipment, wherein the signaling comprises radio resource control signaling or downlink control information.

20. The base station according to claim 17, wherein the attribute configuring unit is further configured to configure an HARQ adaptability attribute of the data packet, wherein the HARQ adaptability attribute comprises adaptive HARQ, non-adaptive HARQ, or semi-adaptive HARQ.

21. The base station according to claim 20, wherein the attribute configuring unit is specifically configured to configure the HARQ adaptability attribute of the data packet to adaptive HARQ or non-adaptive HARQ when the HARQ synchronization attribute of the data packet is configured to synchronous HARQ;

and configure the HARQ adaptability attribute of the data packet to adaptive HARQ or semi-adaptive HARQ when the HARQ synchronization attribute of the data packet is configured to asynchronous HARQ.

22. The base station according to claim 20, wherein the attribute configuring unit is specifically configured to configure a retransmitted packet of the data packet to semi-adaptive HARQ when a mapping relationship is preset between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of uplink subframes or a mapping relationship is preset between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of flexible subframe;

or

configure the HARQ adaptability attribute of a retransmitted packet of the data packet to semi-adaptive HARQ when the HARQ process ID of an initially transmitted packet of the data packet is indicated by using downlink control information.

23. The base station according to claim 17, wherein the process configuring unit comprises:

a process number configuring subunit, configured to preset the numbers of added HARQ processes corresponding to different uplink-downlink subframe configurations;

or determine the number of added HARQ processes according to the number of flexible subframes;

or notify the user equipment of the number of added HARQ processes by using high layer signaling.

24. The base station according to claim 17, wherein the process configuring unit further comprises:

a process ID configuring subunit, configured to preset a mapping relationship between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of uplink subframes;

or preset a mapping relationship between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of flexible subframes;

or indicate the HARQ process ID of an initially transmitted packet of the data packet by using downlink control information.

25. The base station according to claim 17, wherein:

one bit in a downlink assignment index field of the downlink control information is used to indicate the HARQ synchronization attribute of the data packet;

or

one state of a downlink assignment index field of the downlink control information is used to indicate that the scheduled data packet uses synchronous HARQ and another state is used to indicate that the scheduled data packet uses asynchronous HARQ;

or

N states of a downlink assignment index field of the downlink control information are used to indicate that the scheduled data packet uses synchronous HARQ and the remaining 4-N states are used to indicate that the scheduled data packet uses asynchronous HARQ, wherein N is an integer above 0 and below 4;

or

N states of a downlink assignment index field of the downlink control information are used to indicate that the scheduled data packet uses synchronous HARQ and the remaining 4-N states are used to indicate that the scheduled data packet uses asynchronous HARQ, wherein different states of the remaining 4-N states indicate subframe IDs of subframes where the scheduled data packet that uses asynchronous HARQ resides and N is an integer above 0 and below 4.

26. A user equipment, comprising:

a control information receiving unit, configured to receive downlink control information sent by a base station for scheduling a data packet;

an attribute determining unit, configured to determine an HARQ synchronization attribute of the data packet according to the downlink control information, wherein the HARQ synchronization attribute comprises synchronous HARQ or asynchronous HARQ; and

a process determining unit, configured to determine an HARQ process ID of the data packet according to the downlink control information when the HARQ synchronization attribute of the data packet is configured to asynchronous HARQ.

27. The user equipment according to claim 26, wherein the attribute determining unit is further configured to determine an HARQ adaptability attribute of the data packet according to the downlink control information, wherein the HARQ adaptability attribute comprises adaptive HARQ, non-adaptive HARQ, or semi-adaptive HARQ.

28. The user equipment according to claim 27, wherein the attribute determining unit is specifically configured to determine that the HARQ synchronization attribute of the data packet is synchronous HARQ when an initially transmitted packet of the data packet is transmitted in a fixed uplink subframe, and determine that the HARQ synchronization attribute of the data packet is asynchronous HARQ when an initially transmitted packet of the data packet is transmitted in a flexible subframe that serves as an uplink subframe;

or

determine that the HARQ synchronization attribute of the data packet is asynchronous HARQ in all circumstances;

or

determine the HARQ synchronization attribute of the data packet according to a downlink assignment index field in the downlink control information.

29. The user equipment according to claim 27, wherein the user equipment further comprises:

a signaling receiving unit, configured to receive radio resource control signaling sent by the base station, wherein the radio resource control signaling carries the HARQ synchronization attribute of the data packet; and

the attribute determining unit is specifically configured to determine the HARQ synchronization attribute of the data packet according to the downlink control information and the radio resource control signaling.

30. The user equipment according to claim 27, wherein the process determining unit is specifically configured to, after the downlink control information is received, if a mapping relationship is preset between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of uplink subframes, determine the HARQ process ID of the data packet according to the mapping relationship;

or if a mapping relationship is preset between HARQ process IDs of initially transmitted packets of data packets and subframe IDs of flexible subframes, determine the HARQ process ID of the data packet according to the mapping relationship;

or, determine the HARQ process ID of the data packet according to an idle bit of the downlink control information when the HARQ adaptability attribute of a retransmitted packet of the data packet is determined to be semi-adaptive HARQ.