Data transmission method and apparatus
Disclosed is a data transmission method, including: determining, on pre-divided contention access-based resources for data transmission, contention resources for data transmission; and performing resource contention on determined contention resources, and transmitting data on the resource obtained by the contention.
1. A data transmission method, comprising:
determining, on pre-divided contention access-based resources for data transmission, contention resources for data transmission; and
performing resource contention on determined contention resources, and transmitting data on the resource obtained by the contention;
wherein the performing the resource contention on the determined contention resources is implemented according to a predefined rule;
wherein the predefined rule comprises at least one of:
transmitting a Scheduling Request (SR) in a resource contention-based mode, and if scheduling indication information is received, transmitting the data according to the scheduling indication information;
transmitting a data packet for the first time in the resource contention-based mode, and retransmitting the data packet according to a scheduling access mode; or
when a data packet is less than or equal to a threshold, transmitting the data packet in the resource contention-based mode, and when the data packet is greater than the threshold, transmitting buffer status information to a network side to receive resource indication information for scheduling access allocation.
2. The method according to claim 1 , wherein the determining the contention resources for data transmission is implemented by any one of following manners:
determining the contention resources for data transmission by first reading declarative information of occupied resource or indication information of occupied resource transmitted by other equipment; or
determining the contention resources for data transmission according to configuration information or dynamic signaling in a radio resource control (RRC) message of a base station.
3. The method according to claim 2 , wherein
the dynamic signaling comprises: predefined downlink control information (DCI) that is scrambled by a radio network temporary identity or a specific information identity; or group scheduling DCI that is scrambled by a specific radio network temporary identity or a specific information identity.
4. The method according to claim 1 , wherein the transmitting the data on the resource obtained by contention comprises:
transmitting the data directly on the resource obtained by contention; or
receiving usage information of the contention resource transmitted by other UE firstly, and then selecting remaining contention resource to directly transmit the data.
5. The method according to claim 1 , wherein, when the resource contention is performed on an unlicensed carrier, the transmitting the data on the resource obtained by contention comprises:
detecting whether an energy of a signal on the carrier is less than a threshold, if the energy is less than the threshold, transmitting the data directly; and if the threshold is greater than or equal to the threshold, performing a signal identification to identify whether the carrier is being used by a UE in present cell, if yes, transmitting the data on the carrier, and if not, transmitting no data.
6. The method according to claim 1 , wherein, a subframe structure of the transmitted data comprises any of followings:
one subframe, comprising a control area and a data area; or
one subframe, comprising a preamble, a signaling area and a data area.
7. The method according to claim 6 , wherein,
the preamble is used to perform uplink synchronization, channel estimation or occupancy indication; and the control area or the signaling area or the data area carries identification information of a terminal.
8. The method according to claim 1 , wherein, the transmitting the data on the resource obtained by contention comprises:
transmitting data of m subframes continuously, wherein, m is greater than or equal to 1 and less than or equal to k, and k is a predefined value or a semi-statically configured value.
9. The method according to claim 1 , wherein the transmitting the data on the resource obtained by contention is implemented by any of following manners:
using different frequency resources with other UE in the same cell by means of frequency division multiplexing (FDM); or
using same frequency resource with other UE in the same cell simultaneously by means of Multi-User Multiple-Input Multiple-Output (MU-MIMO); or
using same frequency resource with other UE in the same cell simultaneously by means of Non-orthogonal Multiple Access (NOMA); or
using same frequency resource with other UE with same operator.
10. The method according to claim 1 , wherein,
the contention resource is a specific resource or a resource shared by multiple equipment.
11. The method according to claim 1 , wherein, the performing the resource contention on the determined contention resources is further implemented by any of following manners:
according to a network side configuration;
according to a signaling indication; or
according to a network side configuration and a signaling indication.
12. A data transmission apparatus, comprising:
a processor; and
a memory for storing instructions executable by the processor;
wherein the processor is configured to:
determine, on pre-divided grant-fee contention access-based resources for data transmission, contention resources for data transmission; and
perform resource contention on determined contention resources, and transmitting the data on the resource obtained by the contention;
wherein the processor is further configured to perform the resource contention on the determined contention resources according to a predefined rule;
wherein the predefined rule comprises at least one of:
transmitting a Scheduling Request (SR) in a resource contention-based mode, and if scheduling indication information is received, transmitting the data according to the scheduling indication information;
transmitting a data packet for the first time in the resource contention-based mode, and retransmitting the data packet according to a scheduling access mode; or
when a data packet is less than or equal to a threshold, transmitting the data packet in the resource contention-based mode, and when the data packet is greater than the threshold, transmitting buffer status information to a network side to receive resource indication information for scheduling access allocation.
13. The method according to claim 1 , wherein,
the contention resources comprises: consecutive M physical resource blocks (RBs); consecutive N resource particles; K interleaving units; L narrow bands; or P clusters, wherein, M, N, K, L, P are positive integers greater than or equal to 1 and less than a predefined value.
14. The apparatus according to claim 12 , wherein,
the contention resources comprises: consecutive M physical resource blocks (RBs); consecutive N resource particles; K interleaving units; L narrow bands; or P clusters, wherein, M, N, K, L, P are positive integers greater than or equal to 1 and less than a predefined value.