Dual connection communication method in wireless network, apparatus, and system
地域：
Guangdong
摘要
Example communication methods and apparatus in a wireless network are described. One example communication method includes establishing dual connections to a first access network device and a second access network device by a terminal device. A connection that is between the terminal device and the first access network device and that is included in the dual connections is a radio resource control (RRC) connection. The terminal device receives first configuration information sent by the first access network device. The first configuration information includes signaling radio bearer (SRB) configuration information of the second access network device and a trigger condition for using the SRB configuration information. When the trigger condition is met, the terminal device uses the SRB configuration information of the second access network device to establish an RRC connection to the second access network device.
說明書
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This application is a continuation of International Application No. PCT/CN2018/079871, filed on Mar. 21, 2018, which claims priority to Chinese Patent Application No. 201710184934.9, filed on Mar. 24, 2017. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties.
This application relates to the field of communications technologies, and specifically, to a communication method in a wireless network, an apparatus, and a system.
權利要求
What is claimed is:1. A communication method in a wireless network, the method comprising:establishing, by a terminal device, dual connections to a first access network device and a second access network device, wherein a connection that is between the terminal device and the first access network device and that is comprised in the dual connections is a radio resource control (RRC) connection; receiving, by the terminal device, first configuration information sent by the first access network device, wherein the first configuration information comprises signaling radio bearer (SRB) configuration information of the second access network device and a trigger condition for using the SRB configuration information; when the trigger condition is met, using, by the terminal device, the SRB configuration information of the second access network device to establish an RRC connection to the second access network device; and discarding, by the terminal device, the first configuration information based on the first configuration information meeting a first condition, wherein the first condition comprises at least one of the following conditions:the terminal device does not use the first configuration information within a predetermined time; the terminal device receives second instruction information sent by the first access network device, wherein the second instruction information instructs the terminal device to discard the first configuration information; or the terminal device receives a second message sent by the first access network device, wherein the second message comprises updated first configuration information. 2. The method according to claim 1 , wherein the trigger condition comprises at least one of the following conditions:a radio link failure (RLF) occurs between the terminal device and the first access network device; quality of a radio link between the terminal device and the first access network device is lower than a first threshold; quality of a radio link between the terminal device and the second access network device is higher than a second threshold; the quality of the radio link between the terminal device and the second access network device is higher than a third threshold, and a value by which the quality of the radio link between the terminal device and the second access network device is higher than the quality of the radio link between the terminal device and the first access network device is greater than a fourth threshold; the quality of the radio link between the terminal device and the first access network device is lower than a fifth threshold, and the quality of the radio link between the terminal device and the second access network device is higher than a sixth threshold; or the quality of the radio link between the terminal device and the first access network device is lower than a seventh threshold, and the value by which the quality of the radio link between the terminal device and the second access network device is higher than the quality of the radio link between the terminal device and the first access network device is greater than an eighth threshold. 3. The method according to claim 1 , wherein:the SRB configuration information comprises SRB0 configuration information, or the SRB information comprises SRB0 configuration information and SRB1 configuration information, or an SRB type is a secondary cell group (SCG) bearer or a split bearer. 4. The method according to claim 1 , wherein the first configuration information further comprises random access configuration information, and wherein the random access configuration information is used by the terminal device to initiate a random access process for RRC connection establishment to the second access network device. 5. The method according to claim 1 , wherein the first configuration information further comprises measurement configuration information, and wherein the measurement configuration information is used by the terminal device to determine whether the trigger condition is met based on a result obtained by performing measurement by using the measurement configuration information. 6. The method according to claim 1 , wherein before the using, by the terminal device, the SRB configuration information of the second access network device to establish an RRC connection to the second access network device, the method further comprises:receiving, by the terminal device, first instruction information sent by the first access network device, wherein the first instruction information instructs the terminal device to use the SRB configuration information of the second access network device to establish the RRC connection to the second access network device. 7. The method according to claim 1 , wherein the method further comprises:receiving, by the terminal device, second configuration information sent by the second access network device, wherein the second configuration information comprises configuration information of a third access network device; and using, by the terminal device, the configuration information of the third access network device to establish a communication connection to the third access network device. 8. The method according to claim 1 , wherein the method further comprises:receiving, by the terminal device, a first message sent by the second access network device, wherein the first message comprises identification information of a fourth access network device; establishing, by the terminal device, an RRC connection to the fourth access network device based on the identification information of the fourth access network device; and receiving, by the terminal device, an RRC connection release message sent by the second access network device or an RRC connection release message sent by the fourth access network device. 9. The method according to claim 1 , wherein the method further comprises:determining, by the terminal device, a fifth access network device; establishing, by the terminal device, an RRC connection to the fifth access network device; and receiving, by the terminal device, an RRC connection release message sent by the second access network device or an RRC connection release message sent by the fifth access network device. 10. A terminal device, the device comprising:at least one processor; a memory storing instructions executable by the at least one processor, wherein the instructions instruct the at least one processor to control the terminal device to establish dual connections to a first access network device and a second access network device, wherein a connection that is between the terminal device and the first access network device and that is comprised in the dual connections is a radio resource control (RRC) connection; and a transceiver, configured to receive first configuration information sent by the first access network device, wherein the first configuration information comprises signaling radio bearer (SRB) configuration information of the second access network device and a trigger condition for using the SRB configuration information, wherein when the trigger condition is met, the instructions further instruct the at least one processor to control the terminal device to use the SRB configuration information of the second access network device to establish an RRC connection to the second access network device; and wherein the instructions further instruct the at least one processor to control the terminal device to discard the first configuration information based on the first configuration information meeting a first condition, and wherein the first condition comprises at least one of the following conditions:the terminal device does not use the first configuration information within a predetermined time; the terminal device receives second instruction information sent by the first access network device, wherein the second instruction information instructs the terminal device to discard the first configuration information; or the terminal device receives a second message sent by the first access network device, wherein the second message comprises updated first configuration information. 11. The terminal device according to claim 10 , wherein the trigger condition comprises at least one of the following conditions:a radio link failure (RLF) occurs between the terminal device and the first access network device; quality of a radio link between the terminal device and the first access network device is lower than a first threshold; quality of a radio link between the terminal device and the second access network device is higher than a second threshold; the quality of the radio link between the terminal device and the second access network device is higher than a third threshold, and a value by which the quality of the radio link between the terminal device and the second access network device is higher than the quality of the radio link between the terminal device and the first access network device is greater than a fourth threshold; the quality of the radio link between the terminal device and the first access network device is lower than a fifth threshold, and the quality of the radio link between the terminal device and the second access network device is higher than a sixth threshold; the quality of the radio link between the terminal device and the first access network device is lower than a seventh threshold, and the value by which the quality of the radio link between the terminal device and the second access network device is higher than the quality of the radio link between the terminal device and the first access network device is greater than an eighth threshold; or the quality of the radio link between the terminal device and the first access network device is lower than a seventh threshold, and the value by which the quality of the radio link between the terminal device and the second access network device is higher than the quality of the radio link between the terminal device and the first access network device is greater than an eighth threshold. 12. The terminal device according to claim 10 , wherein:the SRB configuration information comprises SRB0 configuration information, or the SRB configuration information comprises SRB0 configuration information and SRB1 configuration information, or an SRB type is a secondary cell group SCG bearer or a split bearer. 13. The terminal device according to claim 10 , wherein the first configuration information further comprises random access configuration information, and wherein the random access configuration information is used to control the terminal device to initiate a random access process for RRC connection establishment to the second access network device. 14. The terminal device according to claim 10 , wherein the first configuration information further comprises measurement configuration information, and the measurement configuration information is used to determine whether the trigger condition is met based on a result obtained by performing measurement by using the measurement configuration information. 15. The terminal device according to claim 10 , wherein before the instructions instruct the at least one processor to control the terminal device to use the SRB configuration information of the second access network device to establish the RRC connection to the second access network device, the transceiver is further configured to receive first instruction information sent by the first access network device, wherein the first instruction information instructs the terminal device to use the SRB configuration information of the second access network device to establish the RRC connection to the second access network device. 16. The terminal device according to claim 10 , wherein:the transceiver is further configured to receive second configuration information sent by the second access network device, wherein the second configuration information comprises configuration information of a third access network device; and the instructions further instruct the at least one processor to control the terminal device to use the configuration information of the third access network device to establish a communication connection to the third access network device. 17. The terminal device according to claim 10 , wherein:the transceiver is further configured to receive a first message sent by the second access network device, wherein the first message comprises identification information of a fourth access network device; the instructions further instruct the at least one processor to control, based on the identification information of the fourth access network device, the terminal device to establish an RRC connection to the fourth access network device; and the transceiver is further configured to receive an RRC connection release message sent by the second access network device or an RRC connection release message sent by the fourth access network device. 18. The terminal device according to claim 10 , wherein:the instructions further instruct the at least one processor to:determine a fifth access network device; and control the terminal device to establish an RRC connection to the fifth access network device; and the transceiver is further configured to receive an RRC connection release message sent by the second access network device or an RRC connection release message sent by the fifth access network device.
意見反饋