Data Transmission Method, Base Station, and User Equipment

• US 20150043526A1
• Filed: 10/27/2014
• Published: 02/12/2015
• 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
• Granted Patent: US 9,603,162 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0006 by adapting the transmission format
• 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 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

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 scheme level and the number of physical resource block pairs, selecting one transport block size (TBS) table from a first TBS table and a second TBS table, and determining a corresponding TBS, so that a coding rate can be increased when the base station transmits service data to the UE according to a TBS in the selected second TBS table.

Claims

1. A data transmission method comprising:

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

determining, by the base station, a time-frequency resource;

determining the number of physical resource block pairs according to the time-frequency resource;

selecting, by the base station, one transport block size (TBS) table from a first TBS table and a second TBS table;

determining a corresponding TBS in the selected first TBS table or the selected second TBS according to the modulation and coding scheme level and the number of physical resource block pairs, wherein any TBS in the second TBS table is not smaller than a TBS in a corresponding position in the first TBS table;

sending, by the base station, service data to a user equipment using the determined 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 scheme level and the time-frequency resource.

2. The method according to claim 1, wherein selecting, by the base station, one TBS table from a first TBS table and a second TBS table comprises selecting, by the base station, one TBS table from the first TBS table and the second TBS according to a system configuration parameter or a system overhead.

3. The method according to claim 1 further comprising sending, by the base station, a higher-layer signaling message to the user equipment, wherein the higher-layer signaling message carries instruction information that instructs the user equipment to select the first TBS table or the second TBS table.

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 instruction information that instructs selection of the first TBS table or the second TBS table.

5. The method according to claim 1, wherein the first TBS table comprises a layer-1 data TBS table in a LTE REL.8 system, wherein all TBSs in the second TBS table are part of TBSs in the first TBS table, and wherein any TBS in the second TBS table is a TBS in the first TBS table, corresponding to a coding rate closest to a target coding rate.

6. The method according to claim 1, wherein the first TBS table comprises a layer-1 data TBS table in a LTE REL.8 system, wherein some TBSs in the second TBS table are part of TBSs in the first TBS table and some TBSs in the second TBS table are part of a set layer-2 data TBS table, and wherein any TBS in the second TBS table is a TBS in the first TBS and the set layer-2 data TBS table, corresponding to a coding rate closest to a target coding rate.

7. A data transmission method, comprising:

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

selecting, by the user equipment, one transport block size (TBS) table from a first TBS table and a second TBS table;

determining a corresponding TBS in the selected first TBS table or the selected second TBS according to the modulation and coding scheme level and the number of physical resource block pairs, wherein any TBS in the second TBS table is not smaller than a TBS in a corresponding position in the first TBS table; and

receiving, by the user equipment, service data from the base station using the determined TBS.

8. The method according to claim 7, wherein selecting, by the user equipment, one TBS table from the first TBS table and the second TBS table comprises selecting, by the user equipment, one TBS table from the first TBS table and the second TBS according to a system configuration parameter or a system overhead.

9. The method according to claim 7, wherein before selecting, by the user equipment, one TBS table from the first TBS table and the second TBS table, the method further comprises receiving, by the user equipment, a higher-layer signaling message from the base station, wherein the higher-layer signaling message carries instruction information that instructs selection of the first TBS table or the second TBS table.

10. The method according to claim 7, wherein before selecting, by the user equipment, one TBS table from the first TBS table and the second TBS table, the method further comprises receiving, by the user equipment, a downlink control message from the base station, wherein the downlink control message carries instruction information that instructs selection of the first TBS table or the second TBS table.

11. The method according to claim 7, wherein the first TBS table comprises a layer-1 data TBS table in a LTE REL.8 system, wherein all TBSs in the second TBS table are part of TBSs in the first TBS table, and wherein any TBS in the second TBS table is a TBS in the first TBS table, corresponding to a coding rate closest to a target coding rate.

12. The method according to claim 7, wherein the first TBS table comprises a layer-1 data TBS table in a LTE REL.8 system, wherein some TBSs in the second TBS table are part of TBSs in the first TBS table, wherein some TBSs in the second TBS table are part of a set layer-2 data TBS table, and wherein any TBS in the second TBS table is a TBS in the first TBS and the set layer-2 data TBS table, corresponding to a coding rate closest to a target coding rate.

14. The base station according to claim 12, wherein the processor is further configured to select one TBS table from the first TBS table and the second TBS according to a system configuration parameter or a system overhead.

15. The base station according to claim 12, wherein the transmitter is further configured to send a higher-layer signaling message to the user equipment, and wherein the higher-layer signaling message carries instruction information that instructs selection of the first TBS table or the second TBS table.

16. The base station according to claim 12, wherein the transmitter is further configured to send a downlink control message to the user equipment, and wherein the downlink control message carries instruction information that instructs selection of the first TBS table or the second TBS table.

17. The base station according to claim 12, wherein the first TBS table comprises a layer-1 data TBS table in a LTE REL.8 system, wherein all TBSs in the second TBS table are part of TBSs in the first TBS table, and wherein any TBS in the second TBS table is a TBS in the first TBS table, corresponding to a coding rate closest to a target coding rate.

18. The base station according to claim 12, wherein the first TBS table comprises a layer-1 data TBS table in a LTE REL.8 system, wherein some TBSs in the second TBS table are part of TBSs in the first TBS table and some TBSs in the second TBS table are part of a set layer-2 data TBS table, and wherein any TBS in the second TBS table is a TBS in the first TBS and the set layer-2 data TBS table, corresponding to a coding rate closest to a target coding rate.

13. A base station comprising:

a processor configured to;

determine a modulation and coding scheme level

determine a time-frequency resource;

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

select one transport block size (TBS) table from a first TBS table and a second TBS table, and

determine a corresponding TBS in the selected first TBS table or the selected second TBS table according to the modulation and coding scheme level and the number of physical resource block pairs, wherein any TBS in the second TBS table is not smaller than a TBS in a corresponding position in the first TBS table; and

a transmitter configured to;

send service data to a user equipment using the determined TBS; and

send a system scheduling control signal to the user equipment, wherein the system scheduling control signal comprises the modulation and coding scheme level and the time-frequency resource.

19. A user equipment comprising:

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

a processor configured to;

select one transport block size (TBS) table from a first TBS table and a second TBS table; and

determine a corresponding TBS in the selected first TBS table or the selected second TBS according to the modulation and coding scheme level and the number of physical resource block pairs, wherein any TBS in the second TBS table is not smaller than a TBS in a corresponding position in the first TBS table, and wherein the receiver is further configured to receive service data from the base station using the determined TBS.

20. The user equipment according to claim 19, wherein the processor is further configured to select one TBS table from the first TBS table and the second TBS according to a system configuration parameter or a system overhead.

21. The user equipment according to claim 19, wherein the receiver is further configured to receive a higher-layer signaling message from the base station before one TBS table is selected from the first TBS table and the second TBS table, and wherein the higher-layer signaling message carries instruction information that instructs selection of the first TBS table or the second TBS table.

22. The user equipment according to claim 19, wherein the receiver is further configured to receive a downlink control message from the base station before one TBS table is selected from the first TBS table and the second TBS table, and wherein the downlink control message carries instruction information that instructs selection of the first TBS table or the second TBS table.

23. The user equipment according to claim 19, wherein the first TBS table comprises a layer-1 data TBS table in a LTE REL.8 system, wherein all TBSs in the second TBS table are part of TBSs in the first TBS table, and wherein any TBS in the second TBS table is a TBS in the first TBS table, corresponding to a coding rate closest to a target coding rate.

24. The user equipment according to claim 19, wherein the first TBS table comprises a layer-1 data TBS table in a LTE REL.8 system, wherein some TBSs in the second TBS table are part of TBSs in the first TBS table and some TBSs in the second TBS table are part of a set layer-2 data TBS table, and wherein any TBS in the second TBS table is a TBS in the first TBS and the set layer-2 data TBS table, corresponding to a coding rate closest to a target coding rate.