Method and apparatus for negotiation communication, and terminal device

1 . A method for negotiation communication, comprising:

receiving, by a terminal device, a paging message transmitted by a first network, or triggering, by a terminal device, initiation of a Radio Resource Control (RRC) connection establishment procedure to a first network, wherein the first network is a network corresponding to a first communication card in the terminal device; and

transmitting, by the terminal device, first indication information to a second network, wherein the first indication information indicates that the terminal device requests to leave the second network, the second network is a network corresponding to a second communication card in the terminal device, wherein during a T1 duration for which the terminal device leaves the second network, the second communication card is in a connected state, the T1 is configured by the second network.

2 . The method of claim 1 , wherein receiving, by the terminal device, the paging message transmitted by the first network comprises:

receiving, by the terminal device, the paging message transmitted by the first network, through the first communication card in an idle state or an inactive state.

3 . The method of claim 1 , further comprises: before transmitting, by the terminal device, the first indication information to the second network,

receiving, by the terminal device, service data transmitted by the second network, through the second communication card in a connected state.

4 . The method of claim 1 , wherein during the T1 duration, a service corresponding to the second communication card is in a suspended state.

5 . The method of claim 1 , further comprising:

after reception of first configuration information transmitted by the second network, starting, by the terminal device, a first timer with the T1 duration, wherein the first configuration information is to determine inactive state configuration of the second communication card;

when the first timer expires, entering, by the terminal device, an inactive state from a connected state at the second communication card, and starting, by the terminal device, a periodic location update timer based on the inactive state configuration of the second communication card;

when the terminal device leaves the first network and returns to the second network before the first timer expires, stopping, by the terminal device, the first timer and releasing, by the terminal device, the inactive state configuration of the second communication card.

6 . The method of claim 5 , wherein

the T1 is contained in the first configuration information; or

the T1 is configured to the terminal device along with the first configuration information.

7 . The method of claim 5 , wherein after the first configuration information is transmitted to the terminal device by the second network, the first timer is started by the second network, and the first timer is configured to trigger the second network to perform:

when the first timer expires, starting the periodic location update timer;

when the terminal device leaves the first network and returns to the second network before the first timer expires, stopping the first timer and releasing the inactive state configuration of the second communication card.

8 . The method of claim 5 , wherein the terminal device leaves the first network and returns to the second network, which comprises:

measuring, by the terminal device, a serving cell of the second network after the terminal device leaves the first network; and

in response to determining that a measurement result of the serving cell of the second network is less than or equal to a threshold or a Radio Link Failure (RLF) occurs in the serving cell of the second network, initiating, by the terminal device, an RRC connection resume procedure or an RRC connection reestablishment procedure to the second network.

9 . The method of claim 5 , wherein the first communication card enters an idle state or an inactive state after the terminal device leaves the first network.

10 . A terminal device, comprising:

a transceiver;

a processor; and

a memory for storing computer programs that, when executed by the processor, cause the processor to:

receive, through the transceiver, a paging message transmitted by a first network, or trigger initiation of a Radio Resource Control (RRC) connection establishment procedure to a first network, wherein the first network is a network corresponding to a first communication card in the terminal device; and

transmit, through the transceiver, first indication information to a second network, wherein the first indication information indicates that the terminal device requests to leave the second network, the second network is a network corresponding to a second communication card in the terminal device, wherein during a T1 duration for which the terminal device leaves the second network, the second communication card is in a connected state, the T1 is configured by the second network.

11 . The terminal device of claim 10 , wherein the transceiver is configured to receive, through the first communication card in an idle state or an inactive state, the paging message transmitted by the first network.

12 . The terminal device of claim 10 , wherein the transceiver is further configured to receive, through the second communication card in a connected state, service data transmitted by the second network.

13 . The terminal device of claim 10 , wherein during the T1 duration, a service corresponding to the second communication card is in a suspended state.

14 . The terminal device of claim 10 , wherein

the transceiver is further configured to receive first configuration information transmitted by the second network, wherein the first configuration information is to determine inactive state configuration of the second communication card; and

the processor is further configured to:

start a first timer with the T1 duration;

when the first timer expires, enter an inactive state from a connected state at the second communication card, and start a periodic location update timer based on the inactive state configuration of the second communication card;

when the terminal device leaves the first network and returns to the second network before the first timer expires, stop the first timer and release the inactive state configuration of the second communication card.

15 . The terminal device of claim 14 , wherein

the T1 is contained in the first configuration information; or

the T1 is configured to the terminal device along with the first configuration information.

16 . The terminal device of claim 14 , wherein after the first configuration information is transmitted to the terminal device by the second network, the first timer is started by the second network, and the first timer is configured to trigger the second network to perform:

when the first timer expires, starting the periodic location update timer;

when the terminal device leaves the first network and returns to the second network before the first timer expires, stopping the first timer and releasing the inactive state configuration of the second communication card.

17 . The terminal device of claim 14 , wherein the processor is further configured to:

measure a serving cell of the second network after the terminal device leaves the first network; and

in response to determining that a measurement result of the serving cell of the second network is less than or equal to a threshold or a Radio Link Failure (RLF) occurs in the serving cell of the second network, initiate an RRC connection resume procedure or an RRC connection reestablishment procedure to the second network.

18 . The terminal device of claim 14 , wherein the first communication card enters an idle state or an inactive state after the terminal device leaves the first network.