Data transmission method and related device

A data transmission method, comprising:

• determining, by a first radio access network node, a target radio access network node to which a media access control layer serving a target terminal belongs;
• when the target radio access network node is the first radio access network node,
• determining, by the first radio access network node, first allocation information used to instruct the first radio access network node to configure a first media access control layer function used to serve the target terminal,
• receiving, by the first radio access network node, a first request message from a second radio access network node, wherein the first request message is used to request to enable the target terminal to access the second radio access network node,
• sending, by the first radio access network node, to the second radio access network node a first response message generated according to the first request message, so that the second radio access network node processes the first response message and sends a processed first response message to the target terminal,
• allocating, by the first radio access network node, a dedicated physical random access channel (PRACH) resource and a third request message to the target terminal;
• sending, by the first radio access network node, the PRACH resource and the third request message to the second radio access network node, so that the second radio access network node sends the PRACH resource and the third request message to the target terminal, the target terminal sends the third request message to the second radio access network node by using the PRACH resource, and the second radio access network node sends the third request message to the first radio access network node;
• receiving, by the first radio access network node, the third request message;
• and
• sending, by the first radio access network node, the second radio access network node a third response message generated according to the third request message, so that the second radio access network node processes the third response message and sends a processed third response message to the target terminal, so that the target terminal accesses the second radio access network node or obtains uplink synchronization with the second radio access network node according to the processed third response message,
• when the target radio access network node is the second radio access network node, instructing, by the first radio access network node, the second radio access network node to determine second allocation information for the second radio access network node to configure a second media access control layer function used to serve the target terminal;
• when the target radio access network node is the first radio access network node and the second radio access network node;
• determining, by the first radio access network node, third allocation information used to instruct the first radio access network node to configure a third media access control layer function used to serve the target terminal,
• determining, by the first radio access network node, fourth allocation information for the second radio access network node to configure a fourth media access control layer function used to serve the target terminal;
• and
• wherein the third media access control layer function and the fourth media access control layer function collaboratively serve the target terminal;
• and
• when at least one of the service data of the target terminal is reconfigured, added, or deleted, a quality of service (QoS) parameter of a service borne by a control plane signaling radio bearer (SRB) or a user plane data bearer (DRB) is changed, or a wireless condition of the target terminal changes, re-determining by the first radio access network node, whether the first radio access network node, the second radio access network node, or both the first radio access network node and the second radio access network node are the target radio access network node.

A data transmission method, comprising:

• determining, by a first radio access network node, a target radio access network node to which a media access control layer serving target terminal belongs,
• when the target radio access network node is the first radio access network node,
• determining, by the first radio access network node, first allocation information used to instruct the first radio access network nose to configure a first media access control layer function used to serve the target terminal,
• receiving, by the first radio access network node, a first request message from a second radio access network node, wherein the first request message is used to request to enable the target terminal to access the second radio access network node,
• sending, by the first radio access network node, to the second radio access network node a first response message generated according to the first request message, so that the second radio access network node processes the first response message and sends a processed first response message to the target terminal,
• when the target radio access network node is the second radio access network node,
• instructing, by the first radio access network node, the second radio access network node to determine second allocation information for the second radio access network node to configure a second media access control layer function used to serve the target terminal,
• receiving, by the first radio access network node, a fourth request message from the second radio access network node, wherein the fourth request message is used to request to enable the target terminal to access the second radio access network node;
• sending, by the first radio access network node, the second radio access network node a fourth response message generated according to the fourth request message, so that the second radio access network node processes the fourth response message and sends a processed fourth response message to the target terminal, wherein the processed fourth response message is used to enable the target terminal to generate a fifth request message used to trigger the first radio access network node to perform contention resolution, the target terminal sends the fifth request message to the second radio access network node, and the second radio access network node processes the fifth request message and sends a processed fifth request message to the first radio access network node;
• receiving, by the first radio access network node, the processed fifth request message;
• generating, by the first radio access network node, a contention resolution message according to the processed fifth request message;
• and
• sending, by the first radio access network node, the contention resolution message to the second radio access network node, so that the second radio access network node generates a fifth response message according to the contention resolution message, and the second radio access network node processes the fifth response message and sends a processed fifth response message to the target terminal, so that the target terminal determines to access the second radio access network node or obtain uplink synchronization with the second radio access network node according to the processed fifth response message;
• when the target radio access network node is the first radio access network node and the second radio access network node,
• determining, by the first radio access network node, third allocation information used to instruct the first radio access network node to configure a third media access control layer function used to serve the target terminal,
• determining by the first radio access network node, fourth allocation information for the second radio access network node to configure a fourth media access control layer function used to serve the target terminal;
• and
• wherein the third media access control layer function and the fourth media access control layer function collaboratively serve the target terminal;
• and
• when at least one of the service data of the target terminal is reconfigured, added, or deleted, a quality of service (OoS) parameter of a service borne by a control plane signaling radio bearer (SRB) or a user plane data bearer (DRB) is changed, or a wireless condition of the target terminal changes, re-determining, by the first radio access network node, whether the first radio access network node, the second radio access network node, or both the first radio access network node and the second radio access network node are the target radio network access network node.

A first radio access network node, comprising:

• an input apparatus;
• an output apparatus;
• a memory;
• and
• a processor configured to:
• determine a target radio access network node to which a media access control layer serving a target terminal belongs,
• when the target radio access network node is determined to be the first radio access network node,
• determine first allocation information used to instruct the first radio access network node to configure a first media access control layer function used to serve the target terminal,
• the input apparatus is further configured to receive a first request message from a second radio access network node, wherein the first request message is used to request to enable the target terminal to access the second radio access network node,
• the output apparatus is further configured to send the second radio access network node a first response message generated according to the first request message, so that the second radio access network node processes the first response message and sends a processed first response message to the target terminal, wherein the processed first response message is used to enable the target terminal to generate a second request message used to trigger the first radio access network node to perform contention resolution, the target terminal sends the second request message to the second radio access network node, and the second radio access network node processes the second request message and sends a processed second request message to the first radio access network node,
• the input apparatus is further configured to receive the processed second request message;
• the processor is further configured to generate a contention resolution message according to the processed second request message, and
• the output apparatus is further configured to send a generated second response message to the second radio access network node, wherein the second response message is used to indicate the contention resolution message, and the second radio access network node processes the second response message and sends a processed second response message to the target terminal, so that the target terminal accesses the second radio access network node or obtains uplink synchronization with the second radio access network node according to the processed second response message;
• when the target radio access network node is determined to be the second radio access network node, instruct the second radio access network node to determine second allocation information, for the second radio access network node to configure a second media access control layer function used to serve the target terminal,
• when the target radio access network node is the first radio access network node and the second radio access network node, determine third allocation information used to instruct the first radio access network node to configure a third media access control layer function used to serve the target terminal, determine fourth allocation information to instruct the second radio access network node to configure a fourth media access control layer function used to serve the target terminal, and wherein the third media access control layer function and the fourth media access control layer function collaboratively serve the target terminal, and
• when at least one of service data of the target terminal is reconfigured, added, or deleted, a quality of service (QoS) parameter of a service borne by a control plane signaling radio bearer (SRB) or a user plane data radio bearer (DRB) is changed, or a wireless condition of the target terminal changes, re-determine whether the first radio access network node, the second radio access network node, or both the first radio access network node and the second radio access network node are target radio access network node.

A first radio access network node, comprising:

• an input apparatus;
• an output apparatus,
• a memory;
• and
• a processor configured to,
• determine a target radio access network node to which a media access control layer serving a target terminal belongs,
• when the target radio access network node is determined to be the first radio access network node,
• determine first allocation information used to instruct the first radio access network node to configure a first media access control layer function used to serve the target terminal,
• the input apparatus is further configured to receive a first request message from a second radio access network node, wherein the first request message is used to request to enable the target terminal to access the second radio access network node,
• the output apparatus is further configured to send the second radio access network node a first response message generated according to the first request message, so that the second radio access network node processes the first response message and sends a processed first response message to the target terminal,
• the processor is further, configured to allocate a dedicated physical random access channel (PRACH) resource and a third request message to the target terminal;
• the output apparatus is further configured to send the PRACH resource and the third request message to the second radio access network node, so that the second radio access network node sends the PRACH resource and the third request message to the target terminal, the target terminal sends the third request message to the second radio access network node by using the PRACH resource, and the second radio access network node sends the third request message to the first radio access network node;
• the input apparatus is further configured to receive the third request message;
• and
• the output apparatus is further configured to send the second radio access network node a third response message generated according to the third request message, so that the second radio access network node processes the third response message and sends a processed third response message to the target terminal, so that the target terminal accesses the second radio access network node or obtains uplink synchronization with the second radio access network node according to the processed third response message;
• when the target radio access network node is determined to be the second radio access network node, instruct the second radio access network node to determine second allocation information, for the second radio access network node to configure a second media access control layer function used to serve the target terminal,
• when the target radio access network node is the first radio access network node and the second radio access network node, determine third allocation information used to instruct the first radio access network node to configure a third media access control layer function used to serve the target terminal, determine fourth allocation information to instruct the second radio access network node to configure a fourth media access control layer function used to serve the target terminal, and wherein the third media access control layer function and the fourth media access control layer function collaboratively serve the target terminal, and
• when at least one of service data of the target terminal is reconfigured, added, or deleted, a quality of service (QoS) parameter of a service borne by a control plane signaling radio bearer (SRB) or a user plane data radio bearer (DRB) is changed, or a wireless condition of the target terminal changes, re-determine whether the first radio access network node, the second radio access network node, or both the first radio access network node and the second radio access network node are target radio access network node.

A first radio access network node, comprising:

• an input apparatus;
• an output apparatus;
• a memory, and
• a processor configured to:
• determine a target radio access network node to which a media access control layer serving a target terminal belongs,
• when the target radio access network node is determined to be the first radio access network node,
• determine first allocation information used to instruct the first radio access network node to configure a first media access control layer function used to serve the target terminal,
• the input apparatus is further configured to receive a first request message from a second radio access network node, wherein the first request message is used to request to enable the target terminal to access the second radio access network node,
• the output apparatus is further configured to receive a first request radio access network node a first response message generated according to the first request message, so that the second radio access network node processes the first response message and send a processed first response message to the target terminal,
• when the target radio access network node is determined to be the second radio access network node,
• instruct the second radio access network node to determine second allocation information, for the second radio access network node to configure a second media access control layer function used to serve the target terminal,
• the input apparatus is further configured to receive a fourth request message from the second radio access network node, wherein the fourth request message is used to request to enable the target terminal to access the second radio access network node;
• the processor is further configured to send the second radio access network node a fourth response message generated according to the fourth request message, so that the second radio access network node processes the fourth response message and sends a processed fourth response message to the target terminal, wherein the processed fourth response message is used to enable the target terminal to generate a fifth request message used to trigger the first radio access network node to perform contention resolution, the target terminal sends the fifth request message to the second radio access network node, and the second radio access network node processes the fifth request message and sends a processed fifth request message to the first radio access network node;
• the input apparatus is further configured to receive the processed fifth request message;
• the processor is further configured to generate a contention resolution message according to the processed fifth request message;
• and
• the output apparatus is further configured to send the contention resolution message to the second radio access network node, so that the second radio access network node generates a fifth response message according to the contention resolution message, and the second radio access network node processes the fifth response message and sends a processed fifth response message to the target terminal, so that the target terminal determines to access the second radio access network node or obtain uplink synchronization with the second radio access network node according to the processed fifth response message;
• when the target radio access network node is the first radio access network node and the second radio access network node, determine third allocation information used to instruct the first radio access network node to configure a third media access control layer function used to serve the target terminal, determine fourth allocation information to instruct the second radio access network node to configure a fourth media access control layer function used to serve the target terminal, and wherein the third media access control layer function and the fourth media access control layer function collaboratively serve the target terminal, and
• when at least one of service data of the target terminal is reconfigured, added, or deleted, a quality of service (QoS) parameter of a service borne by a control plane signaling radio bearer (SRB) or a user plane data radio bearer (DRB) is changed, or a wireless condition of the target terminal changes, re-determine whether the first radio access network node, the second radio access network node, or both the first radio access network node and the second radio access network node are target radio access network node.

A system, comprising:

• a first radio access network node, a second radio access network node, and a target terminal, wherein:
• the first radio access network node is configured to:
• determine a target radio access network node to which a media access control layer serving a target terminal belongs;
• when the target radio access network node is the first radio access network node,
• determine first allocation information used to instruct the first radio access network node to configure a first media access control layer function used to serve the target terminal,
• receive, by the first radio access network node, a first request message from a second radio access network node, wherein the first request message is used to request to enable the target terminal to access the second radio access network node,
• send, by the first radio access network node, to the second radio access network node a first response message generated according to the first request message, so that the second radio access network node processes the first response message and sends a processed first response message to the target terminal, wherein the processed first response message is used to enable the target terminal to generate a second request message used to trigger the first radio access network node to perform contention resolution, so that the target terminal sends the second request message to the second radio access network node, and the second radio access network node processes the second request message and sends a processed second request message to the first radio access network node,
• receive, by the first radio access network node, the processed second request message;
• generate, by the first radio access network node, a contention resolution message according to the processed second request message;
• and
• send, by the first radio access network node, a generated second response message to the second radio access network node, wherein the second response message is used to indicate the contention resolution message, and the second radio access network node processes the second response message and sends a processed second response message to the target terminal, so that the target terminal accesses the second radio access network node or obtains uplink synchronization with the second radio access network node according to the processed second response message;
• when the target radio access network node is the second radio access network node, instruct the second radio access network node to determine second allocation information, wherein the second allocation information is used to instruct the second radio access network node to configure a second media access control layer function used to serve the target terminal, and
• when the target radio access network node is the first radio access network node and the second radio access network node, determine third allocation information and fourth allocation information, wherein the third allocation information is used to instruct the first radio access network node to configure a third media access control layer function used to serve the target terminal, the fourth allocation information is used to instruct the second radio access network node to configure a fourth media access control layer function used to serve the target terminal, and the third media access control layer function and the fourth media access control layer function collaboratively serve the target terminal;
• the second radio access network node is configured to:
• receive first allocation information from the first radio access network node, and determine that the target radio access network node is the first radio access network node according to the first allocation information, or
• determine that the target radio access network node is the second radio access network node, determine second allocation information, and configure, according to the second allocation information, a second media access control layer function used to serve the target terminal, or
• determine that the target radio access network node is the first radio access network node and the second radio access network node, determine third allocation information and fourth allocation information, and configure, according to the fourth allocation information, a fourth media access control layer function used to serve the target terminal;
• and
• wherein the first radio access network node is further configured to when at least one of the service data of the target terminal is reconfigured, added, or deleted, a quality of service (QoS) parameter of a service borne by a control plane signaling radio bearer (SRB) or a user plane data radio bearer (DRB) is changed, or a wireless condition of the target terminal changes, re-determine whether the first radio access network node, the second radio access network node, or both the first radio access network node and the second radio access network node are the target radio access network node.