Data transmission method, base station, and user equipment

• US 9,356,751 B2
• Filed: 06/18/2014
• Issued: 05/31/2016
• Est. Priority Date: 03/21/2013
• Status: Active Grant

• Current Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wang, Jian
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US14/308,306
• Publication Number:
  US 20140301356A1
• Time in Patent Office: 713 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0007 by modifying the frame length
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0015 characterised by the adaptation strategy
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels

Abstract

Embodiments of the present invention provide a data transmission method, a base station, and a user equipment. The data transmission method includes: determining, by a base station, a modulation and coding level and a time-frequency resource, and determining, in a first or second modulation and transport block size index table, a TBS index and a modulation mode, where a second TBS index is not smaller than a first TBS index; and sending service data and a system scheduling control signal to a user equipment by adopting the selected TBS. In this way, the base station can select a larger TBS to achieve a higher coding rate and increase a system throughput.

Claims

1. A data transmission method, comprising:

determining, by a base station, a modulation and coding level;

determining, by the base station, in a first modulation and transport block size (TBS) index table, a first TBS index and a first modulation mode that correspond to the modulation and coding level, or determining, by the base station, in a second modulation and TBS index table, a second TBS index and a second modulation mode that correspond to the modulation and coding level, wherein the second TBS index is larger than or equal to the first TBS index;

determining, by the base station, a time-frequency resource, and determining, according to the time-frequency resource, a quantity of physical resource block pairs;

selecting, by the base station in a TBS table, a TBS corresponding to one of (a) the quantity of physical resource pairs and (b) the determined first TBS index or the determined second TBS index;

sending, by the base station, service data to a user equipment by adopting the selected TBS; and

sending, by the base station, a system scheduling control signal to the user equipment, wherein the system scheduling control signal comprises the modulation and coding level and the time-frequency resource.

2. The method according to claim 1, wherein the determining, by the base station in the first modulation and TBS index table, the first TBS index and the first modulation mode, or determining, in the second modulation and TBS index table, the second TBS index and the second modulation mode further comprises:

according to a system configuration parameter or a system overhead size, determining, by the base station in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determining, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

3. The method according to claim 1, further comprising:

sending, by the base station, a high-layer signaling message to the user equipment, wherein the high-layer signaling message carries indication information of a selection to determine, in the first modulation and index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determine, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

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

sending, by the base station, a downlink control message to the user equipment, wherein the downlink control message carries indication information of a selection to determine, in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determine, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

5. The method according to claim 1, wherein the TBS table comprises a layer 1 data TBS table in Long Term Evolution Release 8 (LTE REL.8).

6. The method according to claim 1, wherein the first modulation and TBS index table is a modulation and TBS index table in Long Term Evolution Release 8 (LTE REL.8).

7. The method according to claim 6, wherein, for the same modulation and coding level, if the second TBS index in the second modulation and TBS index table is larger than the first TBS index in the first modulation and TBS index table, a modulation order of the second modulation mode corresponding to the second TBS index is lower than a modulation order of the first modulation mode corresponding to the first TBS index.

8. A data transmission method, comprising:

receiving, by a user equipment, a system scheduling control signal sent by a base station, wherein the system scheduling control signal comprises a modulation and coding level and a time-frequency resource;

determining, by the user equipment, in a first modulation and transport block size (TBS) index table, a first TBS index and a first modulation mode that correspond to the modulation and coding level, or determining, by the user equipment, in a second modulation and TBS index table, a second TBS index and a second modulation mode that correspond to the modulation and coding level, wherein the second TBS index is larger than or equal to the first TBS index;

determining, by the user equipment, a quantity of physical resource block pairs according to the time-frequency resource; and

selecting, by the user equipment in a TBS table, a TBS corresponding to one of (a) the quantity of physical resource pairs and (b) the determined first TBS index or the determined second TBS index; and

receiving, by adopting the selected TBS, service data sent by the base station.

9. The method according to claim 8, wherein the determining, by the user equipment, in the first modulation and TBS index table, the first TBS index and the first modulation mode, or determining, in the second modulation and TBS index table, the second TBS index and the second modulation mode further comprises:

according to a system configuration parameter or a system overhead size, determining, by the user equipment in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determining, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

10. The method according to claim 8, further comprising:

receiving, by the user equipment, a high-layer signaling message sent by the base station, wherein the high-layer signaling message carries indication information of a selection to determine, in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determine, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

11. The method according to claim 8, further comprising:

receiving, by the user equipment, a downlink control message sent by the base station, wherein the downlink control message carries indication information of a selection to determine, in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determine, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

12. The method according to claim 8, wherein the TBS table comprises a layer 1 data TBS table in Long Term Evolution Release 8 (LTE REL.8).

13. The method according to claim 8, wherein the first modulation and TBS index table is a modulation and TBS index table in Long Term Evolution Release (LTE REL.8).

14. The method according to claim 13, wherein, for the same modulation and coding level, if the second TBS index in the second modulation and TBS index table is larger than the first TBS index in the first modulation and TBS index table, a modulation order of the second modulation mode corresponding to the second TBS index is lower than a modulation order of the first modulation mode corresponding to the first TBS index.

15. A base station, comprising:

a processor, configured to determine a modulation and coding level;

determine, in a first modulation and transport block size (TBS) index table, a first TBS index and a first modulation mode that correspond to the modulation and coding level, or determine, in a second modulation and TBS index table, a second TBS index and a second modulation mode that correspond to the modulation and coding level, wherein the second TBS index is larger than or equal to the first TBS index; and

determine a time-frequency resource, and determine, according to the time-frequency resource, a quantity of physical resource block pairs;

wherein the processor is further configured to select, in a TBS table, a TBS corresponding to one of (a) the quantity of physical resource block pairs and (b) the determined first TBS index or the determined second TBS index; and

a sender, configured to send service data to a user equipment by adopting the selected TBS, and send a system scheduling control signal to the user equipment, wherein the system scheduling control signal comprises the modulation and control level and the time-frequency resource.

16. The base station according to claim 15, wherein the processor is further configured to, according to a system configuration parameter or a system overhead size, determine, in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determine, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

17. The base station according to claim 15, wherein the sender is further configured to send a high-layer signaling message to the user equipment, wherein the high-layer signaling message carries indication information of a selection to determine, in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determine, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

18. The base station according to claim 15, wherein the sender is further configured to send a downlink control message to the user equipment, wherein the downlink control message carries indication information of a selection to determine, in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determine, in the second modulation and index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

19. The base station according to claim 15, wherein the TBS table comprises a layer 1 data TBS table in Long Term Evolution Release 8 (LTE REL.8).

20. The base station according to claim 15, wherein the first modulation and TBS index table is a modulation and TBS index table in Long Term Evolution Release 8 (LTE REL.8).

21. The base station according to claim 20, wherein, for the same modulation and coding level, if the second TBS index in the second modulation and TBS index table is larger than the first TBS index in the first modulation and TBS index table, a modulation order of the second modulation mode corresponding to the second TBS index is lower than a modulation order of the first modulation mode corresponding to the first TBS index.

22. A user equipment, comprising:

a receiver, configured to receive a system scheduling control signal sent by a base station, wherein the system scheduling control signal comprises a modulation and coding level and a time frequency resource; and

a processor, configured to determine, in a first modulation and transport block size (TBS) index table, a first TBS index and a first modulation mode that correspond to the modulation and coding level, or determine, in a second modulation and TBS index table, a second TBS index and a second modulation mode that correspond to the modulation and coding level, wherein the second TBS index is larger than or equal to the first TBS index; and

determine a quantity of physical resource block pairs according to the time-frequency resource;

wherein the processor is further configured to select, in a TBS table, a TBS corresponding to one of (a) the quantity of physical resource blocks and (b) the determined first TBS index or the determined second TBS index; and

the receiver is further configured to receive, by adopting the selected TBS, service data sent by the base station.

23. The user equipment according to claim 22, wherein the processor is further configured to, according to a system configuration parameter or a system overhead size, determine, in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determine, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

24. The user equipment according to claim 22, wherein the receiver is further configured to receive a high-layer signaling message sent by the base station, wherein the high-layer signaling message carries indication information of a selection to determine, in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determine, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

25. The user equipment according to claim 22, wherein the receiver is further configured to receive a downlink control message sent by the base station, wherein the downlink control message carries indication information of a selection to determine, in the first modulation and TBS index table, the first TBS index and the first modulation mode that correspond to the modulation and coding level, or determine, in the second modulation and TBS index table, the second TBS index and the second modulation mode that correspond to the modulation and coding level.

26. The user equipment according to claim 22, wherein the TBS table comprises a layer 1 data TBS table in Long Term Evolution Release 8 (LTE REL.8).

27. The user equipment according to claim 22, wherein the first modulation and TBS index table is a modulation and TBS index table in Long Term Evolution Release 8 (LTE REL.8).

28. The user equipment according to claim 27, wherein, for the same modulation and coding level, if the second TBS index in the second modulation and TBS index table is larger than the first TBS index in the first modulation and TBS index table, a modulation order of the second modulation mode corresponding to the second TBS index is lower than a modulation order of the first modulation mode corresponding to the first TBS index.