Data transmission method, apparatus, and system

Abstract

Embodiments of the present disclosure disclose a method, an apparatus, and a system for data transmission. The method includes: broadcasting, by a relay device, a first message, where the first message is used to indicate that the relay device supports data forwarding; receiving, by the relay device, a second message from a remote device, where the second message includes data of the remote device; and sending, by the relay device, the data to a core network device based on the second message. In the present method, after receiving the first message broadcast by the relay device, the remote device directly sends the data of the remote device to the relay device without establishing a connection dedicated for transmitting the data of the remote device between the remote device and the relay device, thereby reducing signaling and reducing power consumption of the remote device.

1 . A data transmission method, comprising:
 broadcasting, by a relay device, a first message, wherein the first message indicates that the relay device supports data forwarding;   receiving, by the relay device, a second message from a remote device, wherein the second message comprises data of the remote device; and   sending, by the relay device, the data to a core network device based on the second message.   
     
     
         2 . The method according to  claim 1 , wherein the second message further comprises at least one of an authentication parameter and an identity of the remote device. 
     
     
         3 . The method according to  claim 2 , wherein the second message further comprises the authentication parameter; and
 the sending, by the relay device, the data to a core network device based on the second message comprises:   performing, by the relay device, authentication on the remote device based on the authentication parameter; and   sending, by the relay device, the data to the core network device when the remote device is authenticated successfully.   
     
     
         4 . The method according to  claim 1 , wherein the sending the data to a core network device comprises:
 sending, by the relay device, a non-access stratum (NAS) message to the core network device, wherein the NAS message comprises the data and relay indication information, and the relay indication information indicates that the data is forwarded data.   
     
     
         5 . The method according to  claim 1 , wherein the second message further comprises a short message service (SMS) message, and the SMS message comprises the data and an identity of the remote device; and
 the sending the data to a core network device comprises:   sending, by the relay device, a NAS message to the core network device, wherein the NAS message comprises the SMS message.   
     
     
         6 . The method according to  claim 1 , wherein the second message further comprises an identity of the remote device; and
 the sending the data to a core network device comprises:   generating, by the relay device, an SMS message, and   sending, by the relay device, the SMS message to the core network device, wherein the SMS message comprises the data and the identity of the remote device.   
     
     
         7 . A data transmission method, comprising:
 monitoring, by a remote device, a first message broadcast by a relay device, wherein the first message indicates that the relay device supports data forwarding; and   sending, by the remote device, a second message to the relay device, wherein the second message comprises data of the remote device.   
     
     
         8 . The method according to  claim 7 , wherein the second message further comprises at least one of an authentication parameter and an identity of the remote device. 
     
     
         9 . A data transmission method, comprising:
 receiving, by a core network device, a non-access stratum (NAS) message from a relay device, wherein the NAS message comprises data of a remote device and relay indication information, and the relay indication information indicates that the data is forwarded data; and   sending, by the core network device, the data based on the relay indication information.   
     
     
         10 . The method according to  claim 9 , wherein the relay indication information comprises a type of the data, and the sending, by the core network device, the data based on the relay indication information comprises:
 sending, by the core network device, the data to an application server (AS) corresponding to the type based on the type of the data.   
     
     
         11 . The method according to  claim 9 , wherein the sending, by the core network device, the data based on the relay indication information comprises:
 sending, by the core network device, the data to a connection management platform when the relay indication information indicates that the data is the forwarded data.