User equipment, network device, and data transmission method

Abstract

The present invention discloses a data transmission method, user equipment, and a network device. A device-to-device communications system configures a logical channel used by different types of device-to-device data and configures a resource selection parameter for user equipment. In this way, the user equipment is capable of selecting a communication resource by itself according to the resource selection parameter and device-to-device data to be transmitted by the user equipment, and allocating the resource to the to-be-transmitted device-to-device data, improving system reliability.

What is claimed is: 
     
         1 . A method comprising:
 receiving, by a first terminal device, resource selection parameters from a network device, wherein the resource selection parameters comprises a first parameter, and the first parameter indicates a probability of a resource block being used to send to-be-transmitted device-to-device data;   selecting, by the first terminal device, a device-to-device communication resource from a configured device-to-device communication resource for the to-be-transmitted device-to-device data according to the resource selection parameters; and   sending, by the first terminal device, the to-be-transmitted device-to-device data to a second terminal device on the device-to-device communication resource.   
     
     
         2 . The method according to  claim 1 , wherein the resource selection parameters further comprises a second parameter, and the second parameter indicates a quantity of resources can be used to send the to-be-transmitted device-to-device data. 
     
     
         3 . The method according to  claim 1 , wherein before receiving the resource selection parameters of the to-be-transmitted device-to-device data, the method further comprises:
 sending, by the first terminal device to the network device, information about a type of the to-be-transmitted device-to-device data.   
     
     
         4 . The method according to  claim 3 , wherein the type of the to-be-transmitted device-to-device data comprises a priority of the to-be-transmitted device-to-device data. 
     
     
         5 . The method according to  claim 1 , wherein before receiving the resource selection parameters of the to-be-transmitted device-to-device data, the method further comprises:
 determining, by the first terminal device, a logical channel for the to-be-transmitted device-to-device data; and wherein   sending the to-be-transmitted device-to-device data to the second terminal device on the device-to-device communication resource comprises:   sending, by the first terminal device, the to-be-transmitted device-to-device data to the second terminal device on the device-to-device communication resource by using the logical channel.   
     
     
         6 . The method according to  claim 5 , wherein before determining the logical channel for the to-be-transmitted device-to-device data, the method further comprises:
 receiving, by the first terminal device, logical channel configuration from the network device, wherein the logical channel configuration indicates logical channels configured for the first terminal device; and wherein   determining the logical channel for the to-be-transmitted device-to-device data comprises:   determining, by the first terminal device, the logical channel for the to-be-transmitted device-to-device data according to the logical channel configuration and a type of the to-be-transmitted device-to-device data.   
     
     
         7 . A method comprising:
 determining, by a network device, resource selection parameters according to a type of to-be-transmitted device-to-device data of a terminal device, wherein the resource selection parameters comprises a first parameter, and the first parameter indicates a probability of a resource block being used to send the to-be-transmitted device-to-device data; and   sending, by the network device, the resource selection parameters to the terminal device.   
     
     
         8 . The method according to  claim 7 , wherein before determining the resource selection parameters of the to-be-transmitted device-to-device data, the method comprises:
 receiving, by the network device, information about the type of the to-be-transmitted device-to-device data from the terminal device.   
     
     
         9 . The method according to  claim 7 , wherein the type of the to-be-transmitted device-to-device data comprises a priority of the to-be-transmitted device-to-device data. 
     
     
         10 . The method according to  claim 7 , wherein the resource selection parameters further comprises a second parameter, and the second parameter indicates a quantity of resources can be used to send the to-be-transmitted device-to-device data. 
     
     
         11 . An apparatus comprising a storage medium including executable instructions and a processor, wherein the executable instructions, when executed by the processor, cause the apparatus to:
 receive resource selection parameters from a network device, wherein the resource selection parameters comprises a first parameter, and the first parameter indicates a probability of a resource block being used to send to-be-transmitted device-to-device data;   select a device-to-device communication resource from a configured device-to-device communication resource for the to-be-transmitted device-to-device data according to the resource selection parameters; and   send the to-be-transmitted device-to-device data to a terminal device on the device-to-device communication resource.   
     
     
         12 . The apparatus according to  claim 11 , wherein the resource selection parameters further comprises a second parameter, and the second parameter indicates a quantity of resources can be used to send the to-be-transmitted device-to-device data. 
     
     
         13 . The apparatus according to  claim 11 , wherein the executable instructions, when executed by the processor, further cause the apparatus to:
 send information about a type of the to-be-transmitted device-to-device data to the network device.   
     
     
         14 . The apparatus according to  claim 13 , wherein the type of the to-be-transmitted device-to-device data comprises a priority of the to-be-transmitted device-to-device data. 
     
     
         15 . The apparatus according to  claim 11 , wherein the executable instructions, when executed by the processor, further cause the apparatus to:
 determine a logical channel for the to-be-transmitted device-to-device data; and   send the to-be-transmitted device-to-device data to the terminal device on the device-to-device communication resource by using the logical channel.   
     
     
         16 . The apparatus according to  claim 15 , wherein the executable instructions, when executed by the processor, further cause the apparatus to:
 receive logical channel configuration from the network device, wherein the logical channel configuration indicates logical channels configured for the apparatus; and   determine the logical channel for the to-be-transmitted device-to-device data according to the logical channel configuration and a type of the to-be-transmitted device-to-device data.   
     
     
         17 . An apparatus comprising a storage medium including executable instructions and a processor, wherein the executable instructions, when executed by the processor, cause the apparatus to:
 determine resource selection parameters according to a type of to-be-transmitted device-to-device data of a terminal device, wherein the resource selection parameters comprises a first parameter, and the first parameter indicates a probability of a resource block being used to send the to-be-transmitted device-to-device data; and   send the resource selection parameters to the terminal device.   
     
     
         18 . The apparatus according to  claim 17 , wherein the executable instructions, when executed by the processor, further cause the apparatus to:
 receive information about the type of the to be-transmitted device-to-device data from the terminal device.   
     
     
         19 . The apparatus according to  claim 17 , wherein the type of the to-be-transmitted device-to-device data comprises a priority of the to-be-transmitted device-to-device data. 
     
     
         20 . The apparatus according to  claim 17 , wherein the resource selection parameters further comprises a second parameter, and the second parameter indicates a quantity of resources can be used to send the to-be-transmitted device-to-device data.