IP Library › Granted Patent US 10,554,794

Granted Patent B2

US 10,554,794 · App. 15/977,304 · Granted Feb 4, 2020

Information transmission method and apparatus in TDD system

Inventors: Haibao Ren (Shanghai, CN); Yuanjie Li (Shanghai, CN)

Assignee: HUAWEI TECHNOLOGIES CO., LTD.

H04L69/324 H04W72/0406

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Quick Facts

Patent No.: US 10,554,794
App. No.: 15/977,304
Granted: Feb 4, 2020
Kind: B2

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Abstract

A method includes: determining a frame structure used for information transmission in the TDD system, where each frame based on the frame structure includes N subframes with a timing length of K subframes, one super frame includes M consecutive subframes, M is a common multiple of N and 2K, each super frame includes at least one downlink-only subframe, and further includes at least one of an uplink-only subframe, a type-1 subframe, or a type-2 subframe, the downlink-only subframe includes a downlink symbol and no uplink symbol, the type-1 subframe includes an uplink symbol and a downlink symbol with uplink symbols less than downlink symbols, the type-2 subframe includes an uplink symbol and a downlink symbol with uplink symbols more than downlink symbols, and the uplink-only subframe includes an uplink symbol and no downlink symbol; and sending and/or receiving a message based on the frame structure.

Claims (67)

1. An information transmission apparatus, comprising:

a memory to store instructions; and

a processor to execute the instructions to configure the information transmission apparatus to:

determine a frame structure used for information transmission in a time division duplex (TDD) system, wherein each frame based on the frame structure comprises N subframes with a distance between subframes representing a timing length having a value of K subframes, and one super frame having one or more frames with the frame structure comprises M consecutive subframes; and

send and/or receive a message in the TDD system based on the frame structure, wherein

N, K, and M are positive integers, M is a common multiple of N and 2K, each super frame comprises at least one downlink-only subframe, and further comprises at least one of an uplink-only subframe, a type-1 subframe, or a type-2 subframe, the downlink-only subframe comprises downlink symbols and no uplink symbol, the type-1 subframe comprises at least one uplink symbol and at least one downlink symbol, and a quantity of uplink symbols is less than that of downlink symbols, the type-2 subframe comprises at least one uplink symbol and at least one downlink symbol, and a quantity of uplink symbols is greater than that of downlink symbols, and the uplink-only subframe comprises uplink symbols but no downlink symbol.

2. The apparatus according to claim 1 , wherein

an uplink-downlink subframe configuration ratio of the super frame is 0:M, the super frame comprises one downlink-only subframe with a subframe number of └SFNDL_offset/K┘*2K+(SFNDL_offset mod K)+SFNSET_offset, and type-1 subframes as remaining subframes; and

SFNSET_offset represents an offset of a first subframe in a downlink subframe set of the super frame relative to a first subframe in the super frame, and a value of the offset is an integer from 0 to (K−1); SFNDL_offset represents an offset of the downlink-only subframe relative to the first subframe in the downlink subframe set, and a value of the offset is an integer from 0 to (M/2−1); and the downlink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition that └(m−SFNSET_offset)/K┘ is an even number.

3. The apparatus according to claim 1 , wherein

an uplink-downlink subframe configuration ratio of the super frame is 1:1, a downlink subframe set of the super frame comprises only the downlink-only subframe, and an uplink subframe set of the super frame comprises only the uplink-only subframe; and

the downlink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition that └(m−SFNSET_offset)/K┘ is an even number, the uplink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition that └(m−SFNSET_offset)/K┘ is an odd number, SFNSET_offset represents an offset of the first subframe in the downlink subframe set of the super frame relative to the first subframe in the super frame, and a value of the offset is an integer from 0 to (K−1).

4. The apparatus according to claim 3 , wherein

a last symbol of a last downlink-only subframe in consecutive downlink-only subframes in the super frame is a guard period (GP) symbol, or a first symbol of a first downlink-only subframe in consecutive downlink-only subframes in the super frame is a GP symbol, or a first symbol of a first uplink-only subframe in consecutive uplink-only subframes in the super frame is a GP symbol, or a last symbol of a last uplink-only subframe in consecutive uplink-only subframes in the super frame is a GP symbol.

5. The apparatus according to claim 1 , wherein

an uplink-downlink subframe configuration ratio of the super frame is a:(M−a), a downlink subframe set of the super frame comprises a downlink-only subframes and (M/2−a) type-1 subframes, a subframe X in the super frame is a fixed downlink-only subframe in the a downlink-only subframes, an uplink subframe set of the super frame comprises a uplink-only subframes and (M/2−a) type-1 subframes, and a subframe Yin the super frame is a fixed uplink-only subframe in the a uplink-only subframes; and

0<a<M/2, a is a positive integer, a value of X is └SFNDL_offset/K┘*2K+(SFNDL_offset mod K)+SFNSET_offset, a value of Y is (└SFNUL_offset/K┘*2K+K+SFNSET_offset+(SFNUL_offset mod K)) mod M, the downlink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition that └(m−SFNSET_offset)/K┘ is an even number, the uplink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition that └(m−SFNSET_offset)/K┘ is an odd number, SFNSET_offset represents an offset of the first subframe in the downlink subframe set of the super frame relative to the first subframe in the super frame, and a value of the offset is an integer from 0 to (K−1), SFNDL_offset represents an offset of the fixed downlink-only subframe relative to the first subframe in the downlink subframe set, and a value of the offset is an integer from 0 to (M/2-1), and SFNUL_offset represents an offset of the fixed uplink-only subframe relative to a first subframe that is after a first subframe in the downlink subframe set and that belongs to the uplink subframe set, and a value of the offset is an integer from 0 to (M/2−1).

6. The apparatus according to claim 1 , wherein

an uplink-downlink subframe configuration ratio of the super frame is a:(M−a), a downlink subframe set of the super frame comprises (M−a) downlink-only subframes and (a−M/2) type-2 subframes, a subframe X in the super frame is a fixed downlink-only subframe in the (M−a) downlink-only subframes, an uplink subframe set of the super frame comprises (M−a) uplink-only subframes and (a−M/2) type-2 subframes, and a subframe Y in the super frame is a fixed uplink-only subframe in the (M−a) uplink-only subframes; and

M/2<a<M, a is a positive integer, a value of X is └SFNDL_offset/K┘*2K+(SFNDL_offset mod K)+SFNSET_offset, a value of Y is (└SFNUL_offset/K┘*2K+K+SFNSET_offset+(SFNUL_offset mod K)) mod M, the downlink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition that └(m−SFNSET_offset)/K┘ is an even number, the uplink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition that └(m−SFNSET_offset)/K┘ is an odd number, SFNSET_offset represents an offset of the first subframe in the downlink subframe set of the super frame relative to the first subframe in the super frame, and a value of the offset is an integer from 0 to (K−1), SFNDL_offset represents an offset of the fixed downlink-only subframe relative to the first subframe in the downlink subframe set, and a value of the offset is an integer from 0 to (M/2−1), and SFNUL_offset represents an offset of the fixed uplink-only subframe relative to a first subframe that is after a first subframe in the downlink subframe set and that belongs to the uplink subframe set, and a value of the offset is an integer from 0 to (M/2−1).

7. The apparatus according claim 1 , wherein

the downlink-only subframe is used to send at least one of a physical broadcast channel (PBCH), a synchronization signal, a physical hybrid automatic repeat request indicator channel PHICH, a physical downlink control channel (PDCCH), an enhanced physical downlink control channel (EPDCCH), or a physical control format indicator channel (PCFICH).

8. The apparatus according to claim 1 , wherein

the uplink-only subframe is used to send at least one of a physical random access channel (PRACH), a feedback acknowledgement (ACK), a feedback negative acknowledgement (NACK), channel state information (CSI), or a sounding reference signal (SRS).

9. The apparatus according to claim 1 , wherein the apparatus is a base station or user equipment.

10. A method for information transmission in a system, comprising:

determining, by an information transmission apparatus, a frame structure used for information transmission in a time division duplex (TDD) system, wherein each frame based on the frame structure comprises N subframes with a distance between subframes representing a timing length having a value of K subframes, and one super frame having one of more frames with the frame structure comprises M consecutive subframes; and

sending and/or receiving, by the information transmission apparatus, a message based on the frame structure, wherein

11. The method according to claim 10 , wherein

an uplink-downlink subframe configuration ratio of the super frame is 0:M, the super frame comprises one downlink-only subframe: a subframe └SFNDL_offset/K┘*2K+(SFNDL_offset mod K)+SFNSET_offset, and remaining subframes are type-1 subframes; and

SFNSET_offset is used to represent an offset of the first subframe in a downlink subframe set of the super frame relative to the first subframe in the super frame, and a value of the offset is an integer from 0 to (K−1); SFNDL_offset is used to represent an offset of the downlink-only subframe relative to the first subframe in the downlink subframe set, and a value of the offset is an integer from 0 to (M/2−1); and the downlink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition: └(m−SFNSET_offset)/K┘ is an even number.

12. The method according to claim 10 , wherein

the downlink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition: └(m−SFNSET_offset)/K┘ is an even number, the uplink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition: └(m−SFNSET_offset)/K┘ is an odd number, SFNSET_offset is used to represent an offset of the first subframe in the downlink subframe set of the super frame relative to the first subframe in the super frame, and a value of the offset is an integer from 0 to (K−1).

13. The method according to claim 12 , wherein

the last symbol of the last downlink-only subframe in consecutive downlink-only subframes in the super frame is a guard period (GP) symbol, or the first symbol of the first downlink-only subframe in consecutive downlink-only subframes in the super frame is a GP symbol, or the first symbol of the first uplink-only subframe in consecutive uplink-only subframes in the super frame is a GP symbol, or the last symbol of the last uplink-only subframe in consecutive uplink-only subframes in the super frame is a GP symbol.

14. The method according to claim 10 , wherein

0<a<M/2, a is a positive integer, the downlink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition: └(m−SFNSET_offset)/K┘ is an even number, the uplink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition: └(m−SFNSET_offset)/K┘ is an odd number, a value of X is └SFNDL_offset/K┘*2K+(SFNDL_offset mod K)+SFNSET_offset, a value of Y is (└SFNUL_offset/K┘*2K+K+SFNSET_offset+(SFNUL_offset mod K)) mod M, SFNSET_offset is used to represent an offset of the first subframe in the downlink subframe set of the super frame relative to the first subframe in the super frame, and a value of the offset is an integer from 0 to (K−1), SFNDL_offset is used to represent an offset of the fixed downlink-only subframe relative to the first subframe in the downlink subframe set, and a value of the offset is an integer from 0 to (M/2−1), and SFNUL_offset is used to represent an offset of the fixed uplink-only subframe relative to the first subframe that is after the first subframe in the downlink subframe set and that belongs to the uplink subframe set, and a value of the offset is an integer from 0 to (M/2−1).

15. The method according to claim 10 , wherein

M/2<a<M, a is a positive integer, a value of X is └SFNDL_offset/K┘*2K+(SFNDL_offset mod K)+SFNSET_offset, a value of Y is (└SFNUL_offset/K┘*2K+K+SFNSET_offset+(SFNUL_offset mod K)) mod M, the downlink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition: └(m−SFNSET_offset)/K┘ is an even number, the uplink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition: └(m−SFNSET_offset)/K┘ is an odd number, SFNSET_offset is used to represent an offset of the first subframe in the downlink subframe set of the super frame relative to the first subframe in the super frame, and a value of the offset is an integer from 0 to (K−1), SFNDL_offset is used to represent an offset of the fixed downlink-only subframe relative to the first subframe in the downlink subframe set, and a value of the offset is an integer from 0 to (M/2−1), and SFNUL_offset is used to represent an offset of the fixed uplink-only subframe relative to the first subframe that is after the first subframe in the downlink subframe set and that belongs to the uplink subframe set, and a value of the offset is an integer from 0 to (M/2−1).

16. An information transmission apparatus, comprising:

a memory to store instructions;

a processor in communication with the memory to execute the instructions to determine a frame structure used for information transmission in a time division duplex (TDD) system, wherein each frame based on the frame structure comprises N subframes with a distance between subframes representing a timing length having a value of K subframes, and one super frame having one or more frames with the frame structure comprises M consecutive subframes;

a transmitter in communication with the processor to send a message in the TDD system based on the frame structure; and

a receiver in communication with the processor to receive the message in the TDD system based on the frame structure, wherein

17. The apparatus according to claim 16 , wherein

18. The apparatus according to claim 16 , wherein

19. The apparatus according to claim 18 , wherein

20. The apparatus according to claim 16 , wherein

0<a<M/2, a is a positive integer, a value of X is └SFNDL_offset/K┘*2K+(SFNDL_offset mod K)+SFNSET_offset, a value of Y is (└SFNUL_offset/K┘*2K+K+SFNSET_offset+(SFNUL_offset mod K)) mod M, the downlink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition that └(m−SFNSET_offset)/K┘ is an even number, the uplink subframe set is a set of subframes in the super frame that have subframe numbers m meeting a condition that └(m−SFNSET_offset)/K┘ is an odd number, SFNSET_offset represents an offset of the first subframe in the downlink subframe set of the super frame relative to the first subframe in the super frame, and a value of the offset is an integer from 0 to (K−1), SFNDL_offset represents an offset of the fixed downlink-only subframe relative to the first subframe in the downlink subframe set, and a value of the offset is an integer from 0 to (M/2−1), and SFNUL_offset represents an offset of the fixed uplink-only subframe relative to a first subframe that is after a first subframe in the downlink subframe set and that belongs to the uplink subframe set, and a value of the offset is an integer from 0 to (M/2−1).

21. The apparatus according to claim 16 , wherein

22. The apparatus according claim 16 , wherein

the downlink-only subframe is used to send at least one of a physical broadcast channel (PBCH), a synchronization signal, a physical hybrid automatic repeat request indicator channel (PHICH), a physical downlink control channel (PDCCH), an enhanced physical downlink control channel (EPDCCH), or a physical control format indicator channel (PCFICH).

23. The apparatus according to claim 16 , wherein

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 15, 2019

From: REN, HAIBAO; LI, YUANJIE

To: HUAWEI TECHNOLOGIES CO., LTD.

Reel/Frame 048012/0723 →

Priority Claims (1)

CN 2015 1 0764970 · Nov 11, 2015 · national

Continuity (2)

Continuation PCTCN2016104089 · Oct 31, 2016

Related Publication 20180295220A1 · Oct 11, 2018