Method and device for transmitting feedback information

1. A method in a terminal device for transmitting feedback information, comprising:

determining feedback type information and delay information when data is transmitted by a network device, the delay information being determined by a service type and a channel type of the data, the delay information being different for different services and logic channels of the data;

determining a reliability grade of a feedback transmission or that the feedback transmission is exempted at a certain situation, according to the delay information and the feedback type information; and

initiating a first timer according to a transmission timing of the data, a value of the first timer being determined by the delay information, it being determined that a hybrid automation repeat request (HARQ) feedback is exempted when the first timer expires, and it being determined that the HARQ feedback is to be transmitted with a second reliability grade which is higher than a first reliability grade when the first timer does not expire, the second reliability grade being used when the delay information is lower than a delay budget.

2. The method according to claim 1 , wherein

it is determined that the HARQ feedback is to be transmitted with a first reliability grade when the first timer expires.

3. The method according to claim 1 , wherein the feedback type information comprises at least one of hybrid automation repeat request (HARQ) acknowledge (ACK) and HARQ non-acknowledge (NACK).

4. The method according to claim 3 , wherein at least one of:

it is determined that an HARQ feedback is to be transmitted with a second reliability grade which is higher than a first reliability grade when the feedback type information is HARQ NACK; and

it is determined that the HARQ feedback is to be transmitted with the first reliability grade when the feedback type information is not HARQ NACK.

5. The method according to claim 4 , wherein first resources for the HARQ feedback with the first reliability grade are different from second resources for the HARQ feedback with the second reliability grade.

6. The method according to claim 5 , wherein the first resources are allocated in a first carrier and the second resources are allocated in a second carrier which is different from the first carrier.

7. The method according to claim 5 , wherein an HARQ NACK is carried in the second resources by using a contention-based transmission.

8. A method in a network device for receiving feedback information, the method comprising:

transmitting data to a terminal device;

a reliability grade of a feedback transmission being determined by the terminal device or it is determined that the feedback transmission is exempted at a certain situation, according to delay information and feedback type information, the delay information being determined by a service type and a channel type of the data, the delay information being different for different services and logical channels of the data;

initiating a second timer according to a transmission timing of the data, a value of the second timer being determined by the delay information; and

determining that an HARQ feedback is exempted when the second timer expires, and it being determined that the HARQ feedback is to be received with a second reliability grade which is higher than a first reliability grade when the second timer does not expire, the second reliability grade being used when the delay information is lower than a delay budget.

9. The method according to claim 8 , wherein the method further comprising:

receiving a hybrid automation repeat request (HARQ) feedback with a first reliability grade or an HARQ feedback with a second reliability grade which is higher than the first reliability grade.

10. The method according to claim 8 , wherein the feedback type information comprises at least one of hybrid automation repeat request (HARQ) acknowledge (ACK) and HARQ non-acknowledge (NACK).

11. The method according to claim 9 , wherein first resources for the HARQ feedback with the first reliability grade are different from second resources for the HARQ feedback with the second reliability grade.

12. The method according to claim 11 , wherein the method further comprising:

decoding the HARQ feedback in the first resources;

determining a retransmission is to be performed when an HARQ NACK is detected in the first resources; and

determining the HARQ feedback by detecting in the second resources when an HARQ NACK is not detected in the first resources.

13. The method according to claim 11 , wherein the method further comprising:

soft combining signals in the first resources and the second resources when an HARQ ACK is not detected in the first resources.

14. A terminal device, comprising a processor and a memory, the memory containing instructions executable by the processor for transmitting feedback information, by causing the terminal device to:

determine feedback type information and delay information when data is transmitted by a network device, the delay information being determined by one of a service type and a channel type of the data, the delay information being different for different services and logic channels of the data;

determine a reliability grade of a feedback transmission or that the feedback transmission is exempted at a certain situation, according to the delay information and the feedback type information; and

initiate a first timer according to a transmission timing of the data, a value of the first timer being determined by the delay information, it being determined that a hybrid automation repeat request (HARQ) feedback is exempted when the first timer expires, and it being determined that the HARQ feedback is to be transmitted with a second reliability grade which is higher than a first reliability grade when the first timer does not expire, the second reliability grade being used when the delay information is lower than a delay budget.