Communication method, device, and system
Embodiments of this application provide communications methods and apparatuses. In an embodiment, a communications method comprises: sending, by a centralized unit (CU) to a distributed unit (DU), a full configuration indication; and receiving, by the CU from the DU, a cell group configuration generated based on the full configuration indication.
1 . A communication method, comprising:
sending, by a centralized unit (CU) of a base station to a distributed unit (DU) of the base station, a user equipment (UE) context modification request, the UE context modification request comprises a full configuration indication, the full configuration indication is configured to trigger the DU to generate a cell group configuration using a full configuration of radio configurations in response to determining that configuration information of a secondary cell group (SCG) is absent in a predetermined amount of time, wherein the DU is configured with a radio link control (RLC) layer function, a media access control (MAC) layer function, and a physical (PHY) layer function, and the CU is configured with a radio resource control (RRC) layer function, a service data adaptation protocol (SDAP) layer function, and a packet data convergence protocol (PDCP) layer function, and wherein the configuration information of the SCG comprises an SCG configuration of a source secondary node (SN) in response to determining that a master node remains unchanged and is handed over from the source SN to a target SN; and
receiving, by the CU from the DU, the cell group configuration that is generated using the full configuration of the radio configurations.
2 . A communication method, comprising:
receiving, by a distributed unit (DU) of a base station, a user equipment (UE) context modification request from a centralized unit (CU) of the base station, wherein the UE context modification request comprises a full configuration indication, and wherein the DU is configured with a radio link control (RLC) layer function, a media access control (MAC) layer function, and a physical (PHY) layer function, and the CU is configured with a radio resource control (RRC) layer function, a service data adaptation protocol (SDAP) layer function, and a packet data convergence protocol (PDCP) layer function;
determining, by the DU, whether configuration information of a secondary cell group (SCG) is received from the CU, wherein the configuration information of the SCG comprises an SCG configuration of a source secondary node (SN) in response to determining that a master node remains unchanged and is handed over from the source SN to a target SN;
generating, by the DU in response to the full configuration indication and the determining that the configuration information of the SCG is absent in a predetermined amount of time, a cell group configuration using a full configuration of radio configurations; and
sending, by the DU to the CU, the cell group configuration.
3 . The method according to claim 2 , wherein the configuration information of the SCG comprises configuration information for at least one of a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a media access control (MAC) layer, or a physical (PHY) layer.
4 . The communication method according to claim 2 , wherein the DU and the CU are comprised in one base station, the DU comprises: a RLC layer function, a MAC layer function, and a PHY layer function, and
the CU comprises: a RRC layer function, a SDAP layer function, and a PDCP layer function.
5 . The method according to claim 2 , wherein the configuration information of the SCG comprises an SCG configuration of a source secondary node (SN) in response to determining that a master node and the source SN are changed.
6 . The method according to claim 2 , further comprising:
determining, by the DU, whether configuration information of a secondary cell group (SCG) is received from the CU; and
wherein the full configuration is performed to generate the cell group configuration in response to determining that the configuration information of the SCG is received from the CU.
7 . A communication apparatus, wherein the communication apparatus is a centralized unit (CU) of a base station, comprising:
at least one processor; and
a memory storing computer-executable instructions for execution by the at least one processor to perform operations comprising:
sending to a distributed unit (DU) of the base station, a user equipment (UE) context modification request, wherein the UE context modification request comprises a full configuration indication, the full configuration indication is configured to trigger the DU to generate a cell group configuration using a full configuration of radio configurations in response to determining that configuration information of a secondary cell group (SCG) is absent in a predetermined amount of time, wherein the DU is configured with a radio link control (RLC) layer function, a media access control (MAC) layer function, and a physical (PHY) layer function, and the CU is configured with a radio resource control (RRC) layer function, a service data adaptation protocol (SDAP) layer function, and a packet data convergence protocol (PDCP) layer function, and wherein the configuration information of the SCG comprises an SCG configuration of a source secondary node (SN) in response to determining that a master node remains unchanged and is handed over from the source SN to a target SN; and
receiving, by the CU from the DU, the cell group configuration that is generated using the full configuration of the radio configurations.
8 . A communication apparatus, wherein the communication apparatus is a distributed unit (DU) of a base station, comprising:
at least one processor; and
a memory storing computer-executable instructions for execution by the at least one processor to perform operations comprising:
receiving a user equipment (UE) context modification request from a centralized unit (CU) of the base station, wherein the UE context modification request comprises a full configuration indication, wherein the DU is configured with a radio link control (RLC) layer function, a media access control (MAC) layer function, and a physical (PHY) layer function, and the CU is configured with a radio resource control (RRC) layer function, a service data adaptation protocol (SDAP) layer function, and a packet data convergence protocol (PDCP) layer function;
determining, by the DU, whether configuration information of a secondary cell group (SCG) is received from the CU, wherein the configuration information of the SCG comprises an SCG configuration of a source secondary node (SN) in response to determining that a master node remains unchanged and is handed over from the source SN to a target SN;
generating, by the DU in response to the full configuration indication and the determining that the configuration information of the SCG is absent in a predetermined amount of time, a cell group configuration using a full configuration of radio configurations; and
sending, by the DU to the CU, at least one of the cell group configuration.
9 . The communication apparatus according to claim 8 , wherein the configuration information of the SCG comprises configuration information for at least one of a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a media access control (MAC) layer, or a physical (PHY) layer.
10 . The communication apparatus according to claim 8 , wherein the DU and the CU are comprised in one base station, the DU comprises: a RLC layer function, a MAC layer function, and a PHY layer function, and
the CU comprises: a RRC layer function, a SDAP layer function, and a PDCP layer function.
11 . The communication apparatus according to claim 8 , wherein the configuration information of the SCG comprises an SCG configuration of a source secondary node (SN) in response to determining that a master node and the source SN are changed.
12 . The communication apparatus according to claim 8 , further comprising:
determining, whether configuration information of a secondary cell group (SCG) is received from the CU; and
wherein the full configuration is performed to generate the cell group configuration in response to determining that the configuration information of the SCG is received from the CU.