Method and apparatus for data transmission

1. A method for data transmission, applied to a terminal, comprising:

receiving a notification message from a network access device; wherein the notification message comprises at least one candidate alert sequence determined by the network access device, and indication information of at least one uplink grant-free transmission resource allocated for the at least one candidate alert sequence; wherein the at least one candidate alert sequence is a group of sequences predefined by the network access device, and receiving the notification message from the network access device comprises: receiving the notification message carried in a broadcast message transmitted by the network access device, or receiving the notification message carried in an uplink grant-free transmission resource configuration message transmitted by the network access device;

selecting a target alert sequence from the at least one candidate alert sequence;

before transmitting the uplink data by using a grant-free transmission resource, transmitting the target alert sequence to the network access device by using a first uplink grant-free transmission resource corresponding to the target alert sequence; wherein the target alert sequence is configured to notify the network access device that the terminal requests to use the first uplink grant-free transmission resource to transmit uplink data; and

transmitting the uplink data by using a transmission resource different from the first uplink grant-free transmission resource, when receiving a collision indication fed back by the network access device in response to the target alert sequence.

2. The method of claim 1 , further comprising:

transmitting the uplink data to the network access device by using the first uplink grant-free transmission resource corresponding to the target alert sequence, when there is no collision indication fed back by the network access device.

3. The method of claim 1 , wherein transmitting the uplink data by using the transmission resource different from the first uplink grant-free transmission resource comprises:

selecting a target uplink grant-free transmission resource from uplink grant-free transmission resources pre-allocated for the terminal except the first uplink grant-free transmission resource corresponding to the target alert sequence; and

transmitting the uplink data to the network access device by using the target uplink grant-free transmission resource in an uplink grant-free transmission manner.

4. The method of claim 1 , wherein the collision indication comprises: indication information for instructing the terminal to transmit data in a grant-type transmission manner; and

wherein transmitting the uplink data by using the transmission resource different from the first uplink grant-free transmission resource comprises:

requesting the network access device to allocate an available transmission resource for the terminal in the grant-type transmission manner; and

transmitting the uplink data by using the available transmission resource.

5. The method of claim 1 , wherein the target alert sequence comprises one or two target alert sequences.

6. The method of claim 1 , wherein the uplink data comprises: uplink enhanced mobile broadband (eMBB) traffic data, or uplink ultra reliable low latency communication (URLLC) traffic data.

7. A method for data transmission, applied to a network access device, comprising:

determining at least one candidate alert sequence and allocating at least one uplink grant-free transmission resource for the at least one candidate alert sequence, wherein the at least one candidate alert sequence is a group of sequences predefined by the network access device;

transmitting a notification message to a terminal to enable the terminal to select a target alert sequence from the at least one candidate alert sequence; wherein the notification message comprises the at least one candidate alert sequence and indication information of the at least one uplink grant-free transmission resource allocated for the at least one candidate alert sequence, and transmitting the notification message to a terminal comprises: carrying the notification message in a broadcast message, or carrying the notification message in an uplink grant-free transmission resource configuration message;

receiving the target alert sequence from the terminal;

determining whether a first uplink grant-free transmission resource corresponding to the target alert sequence is occupied;

transmitting a collision indication to the terminal in response to that the first uplink grant-free transmission resource is occupied; wherein the collision indication is configured to notify the terminal that the first uplink grant-free transmission resource corresponding to the target alert sequence is occupied; and

receiving uplink data from the terminal by using a transmission resource different from the first uplink grant-free transmission resource.

8. The method of claim 7 , wherein the collision indication comprises: indication information for instructing the terminal to transmit data in a grant-type transmission manner.

9. The method of claim 7 , wherein transmitting the collision indication to the terminal, comprises:

carrying the collision indication in a downlink control channel or a downlink traffic channel.

10. A terminal, comprising:

a processor;

memory for storing a computer program executable by the processor;

wherein the processor is configured to:

receive a notification message from a network access device; wherein the notification message comprises at least one candidate alert sequence determined by the network access device, and indication information of at least one uplink grant-free transmission resource allocated for the at least one candidate alert sequence; wherein the at least one candidate alert sequence is a group of sequences predefined by the network access device, and in receiving the notification message from the network access device the processor is further configured to: receive the notification message carried in a broadcast message transmitted by the network access device, or receive the notification message carried in an uplink grant-free transmission resource configuration message transmitted by the network access device;

select a target alert sequence from the at least one candidate alert sequence

before transmitting the uplink data by using a grant-free transmission resource, transmit the target alert sequence to the network access device by using a first uplink grant-free transmission resource corresponding to the target alert sequence; wherein the target alert sequence is configured to notify the network access device that the terminal requests to use the first uplink grant-free transmission resource to transmit uplink data; and

transmit the uplink data by using a transmission resource different from the first uplink grant-free transmission resource, when receiving a collision indication fed back by the network access device in response to the target alert sequence.

11. The terminal of claim 10 , wherein the processor is further configured to:

transmit the uplink data to the network access device by using the first uplink grant-free transmission resource corresponding to the target alert sequence, when there is no collision indication fed back by the network access device.

12. The terminal of claim 10 , wherein in transmitting the uplink data by using the transmission resource different from the first uplink grant-free transmission resource, the processor is configured to:

select a target uplink grant-free transmission resource from uplink grant-free transmission resources pre-allocated for the terminal except the first uplink grant-free transmission resource corresponding to the target alert sequence; and

transmit the uplink data to the network access device by using the target uplink grant-free transmission resource in an uplink grant-free transmission manner.

13. The terminal of claim 10 , wherein the collision indication comprises: indication information for instructing the terminal to transmit data in a grant-type transmission manner;

wherein in transmitting the uplink data by using the transmission resource different from the first uplink grant-free transmission resource, the processor is configured to:

request the network access device to allocate an available transmission resource for the terminal in the grant-type transmission manner; and

transmit the uplink data by using the available transmission resource.

14. A network access device, comprising:

a processor;

memory for storing a computer program executable by the processor;

wherein the processor is configured to:

determine at least one candidate alert sequence and allocating at least one uplink grant-free transmission resource for the at least one candidate alert sequence, wherein the at least one candidate alert sequence is a group of sequences predefined by the network access device;

transmit a notification message to a terminal to enable the terminal to select a target alert sequence from the at least one candidate alert sequence; wherein the notification message comprises the at least one candidate alert sequence and indication information of the at least one uplink grant-free transmission resource allocated for the at least one candidate alert sequence, and in transmitting the notification message to a terminal, the processor is further configured to: carry the notification message in a broadcast message, or carrying the notification message in an uplink grant-free transmission resource configuration message;

receive the target alert sequence from the terminal;

determine whether a first uplink grant-free transmission resource corresponding to the target alert sequence is occupied;

transmit a collision indication to the terminal in response to that the first uplink grant-free transmission resource is occupied, wherein the collision indication is configured to notify the terminal that the first uplink grant-free transmission resource corresponding to the target alert sequence is occupied; and

receive uplink data from the terminal by using a transmission resource different from the first uplink grant-free transmission resource.

15. The network access device of claim 14 , wherein the fourth transmitting module carries the collision indication in a downlink control channel or a downlink traffic channel.

16. A non-transitory computer-readable storage medium, having stored thereon computer executable instructions that, when executed by a processor of a terminal, cause operations of the method of claim 1 to be performed.