Patent ID: 9549424
Date: 2017-01-17
CPC Classifications: H04L,H04W

Claim:
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); wherein the transmitter is further configured to send an attach request message to the MME before the processor determines whether the data volume of the uplink data to be sent is less than the preset data volume threshold, wherein the attach request message comprises an identifier of the terminal device; wherein the receiver is further configured to, after the transmitter sends the attach request message to the MME, receive the attach accept message sent by the MME, wherein the attach accept message comprises an IP address that is allocated by the MME for the terminal device; wherein the transmitter is configured to, after the receiver receives an attach accept message sent by the MME, send, according to an IP address that is in the attach accept message and allocated by the MME for the terminal device, a first SIP registration request message to the MME by using a second signaling message of the first type between the terminal device and the MME, so that the MME can send the first SIP registration request message to the application server by using a second signaling message of the second type between the MME and the P-CSCF, wherein the first SIP registration request message comprises the identifier of the terminal device and a SIP identifier corresponding to the terminal device; wherein the receiver is further configured to, after the transmitter sends the first SIP registration request message to the MME, receive, by using a third signaling message of the first type between the terminal device and the MME, a first SIP registration completion message returned by the MME, wherein the first SIP registration completion message is returned by the application server after the application server receives the SIP identifier corresponding to the terminal device, and the MME receives the first SIP registration completion message by using a third signaling message of the second type between the MME and the P-CSCF; and wherein only a signaling connection exists between the terminal device and the MME.