Data Transmission Method, Device, and System

摘要

Embodiments of the present invention provide a data transmission method, device, and system. A terminal device determines whether a data volume of uplink data to be sent is less than a preset data volume threshold. If the data volume of the uplink data to be sent is less than the preset data volume threshold, the terminal device establishes an RRC connection to a base station and sends an RRC connection completion message that carries the uplink data to the base station, so that the base station sends the uplink data to an MME by using a signaling message between the base station and the MME. The MME further sends the uplink data to a corresponding application server by using a signaling message between the MME and a P-CSCF.

主权项

1. A terminal device, comprising:
a processor, configured to determine whether a data volume of uplink data to be sent is less than a preset data volume threshold; a transmitter, configured to send a Radio Resource Control (RRC) connection request message to a base station when the processor determines that the data volume of the uplink data is less than the preset data volume threshold, wherein the RRC connection request message comprises indication information that instructs the base station to establish only a signaling connection for the terminal device; and a receiver, configured to, after the transmitter sends the RRC connection request message, receive an RRC connection establishment message sent by the base station; wherein the transmitter is further configured to, after the receiver receives the RRC connection establishment message, carry the uplink data in an RRC connection completion message and send the RRC connection completion message to the base station, so that the base station can send the uplink data to a mobility management entity (MME) according to the indication information and by using a first signaling message of a first type between the base station and the MME, so that the MME sends the uplink data to an application server corresponding to the uplink data by using a first signaling message of a second type between the MME and a proxy-call session control function (P-CSCF).