CN112616162A - Multi-connection method and system in mobile communication system - Google Patents

Multi-connection method and system in mobile communication system Download PDF

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CN112616162A
CN112616162A CN202011439812.8A CN202011439812A CN112616162A CN 112616162 A CN112616162 A CN 112616162A CN 202011439812 A CN202011439812 A CN 202011439812A CN 112616162 A CN112616162 A CN 112616162A
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node
terminal
auxiliary node
connection
new auxiliary
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CN112616162B (en
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陈瑞欣
刘为
宋怡昕
林力
张勇
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Shanghai Institute of Microwave Technology CETC 50 Research Institute
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Shanghai Institute of Microwave Technology CETC 50 Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

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Abstract

The invention provides a multi-connection method and a system in a mobile communication system, which comprises the following steps: step 1: merging the adjacent areas of the main node and all the auxiliary nodes; step 2: evaluating the neighbor cell measurement report of the new auxiliary node through the terminal; and step 3: establishing wireless resources for connecting the terminal through the new auxiliary node, and encapsulating the multi-connection instruction; and 4, step 4: coordinating tunnel information of a general wireless packet service tunnel protocol between all the merged auxiliary nodes and the new auxiliary node through the main node, and sending a multi-connection instruction to the terminal through a wireless link established by the main node; and 5: and the terminal accesses the new auxiliary node according to the wireless resource condition established by the new auxiliary node in the multi-connection instruction. The invention can solve the utilization problem of more than two discrete frequency spectrums and wireless resources of cells, increase the robustness of the communication system in a wireless link and a return network, improve the overall throughput of the communication system and improve the communication service quality and the user experience.

Description

Multi-connection method and system in mobile communication system
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a multi-connection method and system in a mobile communication system.
Background
In the mobile communication system, a dual connection technology is provided, so that a terminal can simultaneously establish two user plane data connections through a Main Node (MN) and an auxiliary node (SN) by using two sets of transceivers, but the dual connection technology can only support two nodes at most: the primary node and the secondary node cannot support multi-connection of more than two nodes.
In view of the above technical background, it is necessary to provide a multi-connection method and system for supporting more than two nodes in a communication system, in order to solve the problem that the mobile communication system can only support at most two nodes.
Patent document CN105517186A (application No.: 201510649919.8) discloses an electronic device comprising a communication interface configured to establish a communication channel with at least one further electronic device, and a processor configured to control establishment of a communication connection with the at least one further electronic device through the communication interface, wherein when a specified electronic device is connected to the electronic device, the processor transmits additional connection information of the at least one further electronic device connectable to the at least one further electronic device to which the specified electronic device has been connected, to the specified electronic device.
Disclosure of Invention
In view of the defects in the prior art, the present invention aims to provide a multi-connection method and system in a mobile communication system.
The multi-connection method in the mobile communication system provided by the invention comprises the following steps:
step 1: merging the adjacent areas of the main node and all the auxiliary nodes, and sending merged information to a terminal through wireless resource control;
step 2: evaluating the neighbor cell measurement report of the new auxiliary node through the terminal, and judging whether the new auxiliary node is connected or not;
and step 3: for the new auxiliary node which is judged to be connected, establishing wireless resources for connecting the terminal through the new auxiliary node, encapsulating the multi-connection instruction, and informing the main node of the wireless resource establishment condition;
and 4, step 4: coordinating tunnel information of a general wireless packet service tunnel protocol between all the merged auxiliary nodes and the new auxiliary node through the main node, and sending a multi-connection instruction containing the establishment condition of the wireless resource of the new auxiliary node to the terminal through a wireless link established by the main node;
and 5: and the terminal accesses the new auxiliary node according to the wireless resource condition established by the new auxiliary node in the multi-connection instruction to complete the connection of the new auxiliary node.
Preferably, the determination process in step 2 includes: if the evaluation result meets the preset condition, initiating a process of adding the evaluation result to the main node to the new auxiliary node; and if the auxiliary node does not meet the preset condition, quitting the auxiliary node adding process.
Preferably, the terminal and the core network perform uplink and downlink data distribution on a multi-connected user plane through the master node and all connected auxiliary nodes.
Preferably, the receiving, by the primary node, the request of the secondary node includes: an auxiliary node adding request, an auxiliary node releasing request and an auxiliary node modifying request.
Preferably, the tunnel information of the gprs tunneling protocol includes a tunnel IP and a tunnel ID.
According to the present invention, there is provided a multi-connection system in a mobile communication system, comprising:
module M1: merging the adjacent areas of the main node and all the auxiliary nodes, and sending merged information to a terminal through wireless resource control;
module M2: evaluating the neighbor cell measurement report of the new auxiliary node through the terminal, and judging whether the new auxiliary node is connected or not;
module M3: for the new auxiliary node which is judged to be connected, establishing wireless resources for connecting the terminal through the new auxiliary node, encapsulating the multi-connection instruction, and informing the main node of the wireless resource establishment condition;
module M4: coordinating tunnel information of a general wireless packet service tunnel protocol between all the merged auxiliary nodes and the new auxiliary node through the main node, and sending a multi-connection instruction containing the establishment condition of the wireless resource of the new auxiliary node to the terminal through a wireless link established by the main node;
module M5: the terminal provides a baseband processing module for each node, the baseband processing module corresponding to the node accesses the new auxiliary node according to the wireless resource condition established by the new auxiliary node in the multi-connection instruction to complete the connection of the new auxiliary node, the baseband processing modules of the terminal are interconnected by adopting an extensible high-speed data interface, and the wireless packet service data received by each baseband processing module is converged and combined through the interface.
Preferably, the determination process in the module M2 includes: if the evaluation result meets the preset condition, initiating a process of adding the evaluation result to the main node to the new auxiliary node; and if the auxiliary node does not meet the preset condition, quitting the auxiliary node adding process.
Preferably, the terminal and the core network perform uplink and downlink data distribution on a multi-connected user plane through the master node and all connected auxiliary nodes.
Preferably, the receiving, by the primary node, the request of the secondary node includes: an auxiliary node adding request, an auxiliary node releasing request and an auxiliary node modifying request.
Preferably, the tunnel information of the gprs tunneling protocol includes a tunnel IP and a tunnel ID.
Compared with the prior art, the invention has the following beneficial effects: according to the multi-connection method and the multi-connection system, the utilization problem of more than two discrete frequency spectrums and wireless resources of cells can be solved, the robustness of the communication system in a wireless link and a return network is improved, the overall throughput of the communication system is improved, and the communication service quality and the user experience are improved.
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Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic diagram of MN terminated multi-connection setup;
fig. 2 is a schematic diagram of a multi-connection setup with unchanged SN terminated user plane termination nodes;
FIG. 3 is a schematic diagram of a multi-connection setup with SN termination accompanied by a change of user plane termination node;
fig. 4 is a diagram of MN terminated multi-connection release;
FIG. 5 is a schematic diagram of multi-connection release of a non-terminating node terminated by an SN;
FIG. 6 is a schematic diagram of multi-connection release of a termination node terminated by an SN;
fig. 7 is a schematic diagram of the connection of the internal baseband processing module of the terminal according to the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1:
the multi-connection method in the mobile communication system provided by the invention comprises the following steps:
step 1: merging the adjacent areas of the main node and all the auxiliary nodes, and sending merged information to a terminal through wireless resource control;
step 2: evaluating the neighbor cell measurement report of the new auxiliary node through the terminal, and judging whether the new auxiliary node is connected or not;
and step 3: for the new auxiliary node which is judged to be connected, establishing wireless resources for connecting the terminal through the new auxiliary node, encapsulating the multi-connection instruction, and informing the main node of the wireless resource establishment condition;
and 4, step 4: coordinating tunnel information of a general wireless packet service tunnel protocol between all the merged auxiliary nodes and the new auxiliary node through the main node, and sending a multi-connection instruction containing the establishment condition of the wireless resource of the new auxiliary node to the terminal through a wireless link established by the main node;
and 5: and the terminal accesses the new auxiliary node according to the wireless resource condition established by the new auxiliary node in the multi-connection instruction to complete the connection of the new auxiliary node.
Preferably, the determination process in step 2 includes: if the evaluation result meets the preset condition, initiating a process of adding the evaluation result to the main node to the new auxiliary node; and if the auxiliary node does not meet the preset condition, quitting the auxiliary node adding process.
Preferably, the terminal and the core network perform uplink and downlink data distribution on a multi-connected user plane through the master node and all connected auxiliary nodes.
Preferably, the receiving, by the primary node, the request of the secondary node includes: an auxiliary node adding request, an auxiliary node releasing request and an auxiliary node modifying request.
Preferably, the tunnel information of the gprs tunneling protocol includes a tunnel IP and a tunnel ID.
According to the present invention, there is provided a multi-connection system in a mobile communication system, comprising:
module M1: merging the adjacent areas of the main node and all the auxiliary nodes, and sending merged information to a terminal through wireless resource control;
module M2: evaluating the neighbor cell measurement report of the new auxiliary node through the terminal, and judging whether the new auxiliary node is connected or not;
module M3: for the new auxiliary node which is judged to be connected, establishing wireless resources for connecting the terminal through the new auxiliary node, encapsulating the multi-connection instruction, and informing the main node of the wireless resource establishment condition;
module M4: coordinating tunnel information of a general wireless packet service tunnel protocol between all the merged auxiliary nodes and the new auxiliary node through the main node, and sending a multi-connection instruction containing the establishment condition of the wireless resource of the new auxiliary node to the terminal through a wireless link established by the main node;
module M5: the terminal provides a baseband processing module for each node, the baseband processing module corresponding to the node accesses the new auxiliary node according to the wireless resource condition established by the new auxiliary node in the multi-connection instruction to complete the connection of the new auxiliary node, each baseband processing module of the terminal adopts an extensible high-speed data interface for interconnection, and wireless packet service data received by each baseband processing module is converged and combined through the interface, and the specific connection mode is as shown in fig. 7.
A plurality of radio base station apparatus nodes in a mobile communication system are named as follows:
the wireless base station equipment which is accessed by the terminal equipment for the first time is a main node MN;
the wireless base station devices accessed by the terminal device for the second time and later are auxiliary nodes SN, the No. 1, 2, … …, and the n auxiliary nodes are named as SN1, SN2, … …, SNn by numbers.
When the specific number of a certain secondary node is not determined, it is named SNx.
Example 2:
as in fig. 1, the MN terminates (MNTerminated) multi-connection setup:
0. in the system, MN completes multi-connection of 'MN termination' (MNterminated) with n-1(n is more than or equal to 2) auxiliary nodes, and after the MN combines the neighbor configuration of the MN and all the n-1 auxiliary nodes and sends the neighbor configuration to the terminal, the MN receives a neighbor measurement report of the terminal about the nth auxiliary node (SNn);
MN decision may initiate multi-connectivity for node SNn, send a "secondary node addition request" message (SNodeAdditionRequest) for "MN termination" to node SNn. The message carries a field of "PDU session resource establishment information-MN terminated" (PDU usage resource information-MN terminated). The "MN uplink PDCP user plane tunnel information" field (MN-UL-PDCP-UP-tnlifo) carried in the message includes an uplink GTPU tunnel allocated by the MN to the node SNn.
2, SNn establishes wireless resource for terminal, at the same time, allocates down GTPU tunnel for MN, sends "MN terminated" auxiliary node adds request response "message (SNodeAdditionRequestAcknowledgee) to MN. The 'SN downlink auxiliary cell group user plane tunnel information' field (sN-DL-SCG-UP-TNLInfo) carried in the message contains a downlink GTPU tunnel: SNn are assigned downstream GTPU tunnels for the MN. The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains a "multi-connection indication": the "NR secondary cell group" field (NR-SCG) of RRCReconfiguration contains n multi-connected secondary nodes by recursive nesting; the secondary cell group field of rrcreconfigurable carries radio resource configurations of n secondary nodes, and the secondary cell group field includes SNn a cell group identification field (cellGroupId), which is a node number n.
And 3, the MN sends the multi-connection indication RRCREConfiguration message in the step 2 to the terminal.
4. The terminal receives the RRC reconfiguration message, determines that it is "multi-connection indication", establishes a radio resource for SNn, and transmits an RRC reconfiguration complete message (rrcreeconfigurationcomplete) to the MN.
The MN encapsulates the rrcconfigurationcomplete of the terminal in a "secondary node reconfiguration complete" message (snoderreconfigurationcomplete) of the MN to SNn.
6. The terminal initiates a random access procedure to SNn.
7. Up to this point, the "MN terminated" (MNterminated) multi-connection establishment is complete. And the terminal and the core network can perform multi-connection user plane uplink and downlink data distribution through the MN and the n SNs.
And after n is equal to n +1, according to the steps 1 to 7, further adding more auxiliary nodes to complete multi-connection establishment of more nodes.
Example 3:
as in fig. 2, the "SN terminated" (SNTerminated) user plane termination node invariant multi-connection setup:
0. in the system, MN completes multi-connection of SN termination (SNterminated) with n-1(n is more than or equal to 2) auxiliary nodes, and after MN combines the neighbor configuration of MN and all n-1 auxiliary nodes and sends the neighbor configuration to the terminal, MN receives the neighbor measurement report of the terminal about the nth auxiliary node (SNn);
MN decision may initiate multi-connectivity for node SNn with the terminating node unchanged, then send a "secondary node add request" message (SNodeAdditionRequest) for "SN termination" to node SNx. The message carries a field (PDU session resource setup info-SN terminated) of "PDU session resource setup info-SN terminated". The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains a "multi-connection indication" of the previous n-1 secondary nodes.
2, SNx, deciding that it can accept multi-connection of node SNn, then allocating an uplink GTPU tunnel for SNn, and sending "SN terminated" auxiliary node addition request response "message to MN, where the" SN uplink PDCP user plane tunnel information "field (SN-UL-PDCP-UP-tnlifo) in the message includes the uplink GTPU tunnel allocated for SNn by SNx.
The MN sends a "secondary node addition request" message (SNodeAdditionRequest) of "MN termination" to the node SNn. The message carries a field of "PDU session resource establishment information-MN terminated" (PDU usage resource information-MN terminated). The "MN uplink PDCP user plane tunnel information" field (MN-UL-PDCP-UP-TNLInfo) carried in the message includes the uplink GTPU tunnel allocated for SNn by SNx in step 2.
And 4, SNn establishing wireless resources for the terminal, simultaneously allocating a downlink GTPU tunnel for SNx, and sending a 'secondary node addition request response' message (SNodeAdditionRequestAcknowledgee) of 'MN termination' (MNterminated) to the MN. The SN downlink secondary cell group user plane tunnel information field (SN-DL-SCG-UP-TNLInfo) carried in the message contains SNn downlink GTPU tunnel allocated for SNx. The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains a "multi-connection indication": the "NR secondary cell group" field (NR-SCG) of RRCReconfiguration contains n multi-connected secondary nodes by recursive nesting; the secondary cell group field of rrcreconfigurable carries radio resource configurations of n secondary nodes, and the secondary cell group field includes SNn a cell group identification field (cellGroupId), which is a node number n.
5, the MN sends an "Xn user plane address indication" message (xuuaddress indication) to the node SNx, and the "MN Xn user plane tunnel information" field (MN-Xn-U-tnlifoatm) carried in the message contains the downlink GTPU tunnel allocated to the node SNx by SNn in step 4.
The MN sends the "multiple connection indication" RRCReconfiguration message in step 4 to the terminal.
7. The terminal receives the RRC reconfiguration message, determines that it is "multi-connection indication", establishes a radio resource for SNn, and transmits an RRC reconfiguration complete message (rrcreeconfigurationcomplete) to the MN.
The MN encapsulates the rrcconfigurationcomplete of the terminal in a "secondary node reconfiguration complete" message (snoderreconfigurationcomplete) of the MN to SNn.
9. The terminal initiates a random access procedure to SNn.
10. Up to this point, the "SN terminated" (SNterminated) termination node-invariant multi-connection setup is completed. And the terminal and the core network can perform multi-connection user plane uplink and downlink data distribution through the MN and the n SNs.
And n is n +1, and according to the steps 1 to 10, more auxiliary nodes can be continuously added to complete the multi-connection establishment of more nodes.
Example 4:
as in fig. 3, "SN terminated" (SNTerminated) multi-connection setup with user plane termination node change:
0. in the system, MN completes multi-connection of SN termination (SNterminated) with n-1(n is more than or equal to 2) auxiliary nodes, and after MN combines the neighbor configuration of MN and all n-1 auxiliary nodes and sends the neighbor configuration to the terminal, MN receives the neighbor measurement report of the terminal about the nth auxiliary node (SNn);
MN decides that multi-connectivity for node SNn can be initiated and the terminating node needs to change to SNn, then a downstream GTPU tunnel is allocated for SNn. A "secondary node addition request" message (SNodeAdditionRequest) of "SN termination" is sent to the node SNn. The message carries a field (PDU session resource setup info-SN terminated) of "PDU session resource setup info-SN terminated". The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains a "multi-connection indication" of the previous n-1 secondary nodes.
2, SNn, if it is judged that multiple connections can be accepted, allocating n uplink GTPU tunnels for MN and n-1 SNs that have completed multiple connections, and sending "SN addition request response" message (snodebeditionrequestacknowledde) of "SN termination" to MN, where the "SN uplink PDCP user plane tunnel information" field (SN-UL-PDCP-UP-tnlifo) in the message includes the above-mentioned SNn uplink GTPU tunnels allocated for all n nodes in the system. Particularly, to prevent the problem of user plane packet loss caused during the change of the user plane terminating node, SNn should be a forwarding tunnel allocated to the source user plane terminating node SNx, and the message should include fields of an "uplink forwarding user plane tunnel" (ulForwardingUPTNL) and a "downlink forwarding user plane tunnel" (dlForwardingUPTNL). The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains a "multi-connection indication": the "NR secondary cell group" field (NR-SCG) of RRCReconfiguration contains n multi-connected secondary nodes by recursive nesting; the secondary cell group field of rrcreconfigurable carries radio resource configurations of n secondary nodes, and the secondary cell group field includes SNn a cell group identification field (cellGroupId), which is a node number n.
The MN sends a "Secondary node modification request" message (SNodeModifierRequest) of "MN terminate" to all n-1 SNs (SNs 1 to SNn-1), respectively. The message carries a "PDU session resource modification information-MN terminated" field (PDU session resource modification info-MN terminated). The 'MN uplink PDCP user plane tunnel information' field (mN-UL-PDCP-UP-TNLInfo) carried in the field respectively comprises SNn uplink GTPU tunnels distributed for all n-1 SNs (SN1 to SNn-1).
4. All n-1 SNs (SN 1-SNn-1) each allocate a downstream GTPU tunnel to SNn, and send a "secondary node modification request response" message (nodemodification request acknowledgement) to the MN, respectively, that is "MN terminated". And an SN downlink auxiliary cell group user plane tunnel information field (sN-DL-SCG-UP-TNLInfo) carried in the message comprises downlink GTPU tunnels distributed by the SNs SNn.
5, the MN sends an "Xn user plane address indication" message (xuuaddress indication) to the node SNn, where the "MN Xn user plane tunnel information" field (MN-Xn-U-tnlinform m) carried in the message includes the downlink GTPU tunnel allocated by the MN for SNn in step 1 and the downlink GTPU tunnel allocated by each SN for SNn in step 4.
6. In particular, to prevent the problem of user plane packet loss caused during the change of the user plane termination point, the MN should send an "Xn user plane address indication" message (xuandydress indication) to the source user plane termination node SNx, and carry fields of "upstream forwarding user plane tunnel" (ulforwarding uptnl) and "downstream forwarding user plane tunnel" (dlforwarding uptnl), which contain the forwarding tunnel allocated for SNx in step 2 at SNn.
The MN sends the "multiple connection indication" RRCReconfiguration message in step 2 to the terminal.
8. The terminal receives the RRC reconfiguration message, determines that it is "multi-connection indication", establishes a radio resource for SNn, and transmits an RRC reconfiguration complete message (rrcreeconfigurationcomplete) to the MN.
The MN encapsulates the rrcconfigurationcomplete of the terminal in a "secondary node reconfiguration complete" message (snoderreconfigurationcomplete) of the MN to SNn.
10. The terminal initiates a random access procedure to SNn.
11. In particular, the source user plane terminating node SNx should send a "sequence number status forward" message (SNStatusTransfer) to the MN, which should be forwarded SNn by the MN.
12. In particular, the source user plane termination node SNx should forward the received upstream and downstream user plane data to the SNn assigned forwarding tunnel for SNx obtained in step 7.
13. Since the ue terminating node is changed, the MN shall initiate SNx to SNn PDU Session Path Update procedure (PDU Session Path Update procedure) to Update the ue data Path of the core network to the node SNn. SNx, releasing the original GTPU tunnel in the step 0 after receiving the End Marker packet.
14. Up to this point, the "SN terminated" (SNterminated) multi-connection setup with termination node change is completed. And the terminal and the core network can perform multi-connection user plane uplink and downlink data distribution through the MN and the n SNs.
And n is n +1, and according to the steps 1 to 14, more auxiliary nodes can be added continuously to complete the multi-connection establishment of more nodes.
Example 5:
as in fig. 4, "MN terminated" (MNTerminated) multi-connection release:
0. in the system, the MN completes multi-connection of 'MN termination' with n (n is more than or equal to 2) auxiliary nodes, and the MN receives a 'failure indication' or a 'measurement report' of the terminal with respect to SNn.
MN decides that a multi-connection release of node SNn should be initiated, then sends a "secondary node release request" message (SNodeReleaseRequest) to node SNn. The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains the "multiple connection indication" of the current n secondary nodes.
2, SNn sends a "secondary node release request response" message (snoderreleaserequestacknowledge) to the MN. The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains a "multi-connection indication" for n-1 secondary nodes other than the SNn node.
And 3, the MN sends the multi-connection indication RRCREConfiguration message in the step 2 to the terminal.
4. The terminal receives the RRC reconfiguration message, releases SNn the radio resource, and sends an RRC reconfiguration complete message (rrcconfigurationcomplete) to the MN.
The MN sends a "terminal context release" message (uecontextdelete) to the SNn, which releases the relevant terminal context.
6. Up to this point, the "MN terminated" (MNterminated) multi-connection release is complete. The multi-connected user plane uplink and downlink data distribution between the terminal and the core network continues at the MN and the n-1 SNs (SNn released).
And n-1, according to the steps 1 to 6, continuously releasing more auxiliary nodes to complete the multi-connection release of more nodes.
Example 6:
as in fig. 5, the multi-connection release of the "SN terminated" (SNTerminated) non-terminated node:
0. in the system, the MN completes multi-connection of 'MN termination' with n (n is more than or equal to 2) auxiliary nodes, and the MN receives a 'failure indication' or a 'measurement report' of the terminal with respect to SNn.
MN decides that a multi-connection release of node SNn should be initiated, then sends a "secondary node release request" message (SNodeReleaseRequest) to node SNn. The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains the "multiple connection indication" of the current n secondary nodes.
2, SNn sends a "secondary node release request response" message (snoderreleaserequestacknowledge) to the MN. The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains a "multi-connection indication" for n-1 secondary nodes other than the SNn node.
The MN sends a "secondary node modification request" message (snoodemodificationrequest) to the user plane terminating node SNx. The MN downlink secondary cell group user plane tunnel information (MN-DL-SCG-UP-TNLInfo) field in the message contains the downlink tunnels of n-1 multi-connection nodes except SNn.
And 4, SNx deleting the downlink tunnel previously allocated for SNn and deleting the uplink tunnel of SNn according to the field of 'MN downlink auxiliary cell group user plane tunnel information' (mN-DL-SCG-UP-TNLInfo) in the step 3, and sending a 'auxiliary node modification request response' message (SNodemodificationRequestAcknowledgement) to the MN. And deleting SNn the uplink tunnel information of the message by using a field (sN-UL-PDCP-UP-TNLInfo) of the uplink PDCP user plane tunnel information of the auxiliary node.
And 5, the MN sends the multi-connection indication RRCREConfiguration message in the step 2 to the terminal.
6. The terminal receives the RRC reconfiguration message, releases SNn the radio resource, and sends an RRC reconfiguration complete message (rrcconfigurationcomplete) to the MN.
The MN sends a "terminal context release" message (uecontextdelete) to the SNn, which releases the relevant terminal context.
8. Up to this point, the "SN terminated" (SNterminated) multi-connection release is complete. The multi-connected user plane uplink and downlink data distribution between the terminal and the core network continues at the MN and the n-1 SNs (SNn released).
And n-1, according to the steps 1 to 8, continuously releasing more auxiliary nodes to complete the multi-connection release of more nodes.
Example 7:
as in fig. 6, the multi-connection release of the terminating node of "SN terminated" (SNTerminated):
0. in the system, the MN completes multi-connection of SN termination with n (n is more than or equal to 2) auxiliary nodes, and the MN receives failure indication or measurement report of the terminal relative to the user plane termination node SNx.
1, MN decides to initiate multi-connection release of user plane terminating node SNx, and user plane terminating node should be modified to SNn, then allocates downlink GTPU tunnel for SNn. A "secondary node release request" message (snoderreleaserequest) is sent to node SNx. The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains the "multiple connection indication" of the current n secondary nodes.
2, SNn sends a "secondary node release request response" message (snoderreleaserequestacknowledge) to the MN. The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains a "multi-connection indication" for n-1 secondary nodes other than the SNn node.
And 3, the MN judges that the terminating node needs to be changed to SNn, and sends an auxiliary node modification request message (SNodeModifierRequest) of 'SN termination' to the node SNn. The message carries a "PDU session resource modification information-SN terminated" field (PDU session resource modification info-terminated). The RRC reconfiguration message (rrcreeconfiguration) encapsulated in the message contains a "multi-connection indication" for n-1 secondary nodes other than the SNn node.
4, SNn judges SNx node to be deleted by "multi-connection indication", and judges that it can accept the change of user plane terminating node, then allocates n-1 uplink GTPU tunnels for MN and n-2 SNs except SNx, and sends "SN terminating" auxiliary node modification request response message (snodemodificationrequestacknowledgement) to MN, where the "SN uplink PDCP user plane tunnel information" field (SN-UL-PDCP-UP-tnlifo) in the message includes the above SNn uplink GTPU tunnel allocated for n-1 nodes. Particularly, to prevent the problem of user plane packet loss caused during the change of the user plane terminating node, SNn should be a forwarding tunnel allocated to the source user plane terminating node SNx, and the message should include fields of an "uplink forwarding user plane tunnel" (ulForwardingUPTNL) and a "downlink forwarding user plane tunnel" (dlForwardingUPTNL).
The MN sends "secondary node modification request" messages (snoodemodificationrequest) of "MN termination" to the n-2 SNs except SNx, respectively. The message carries a "PDU session resource modification information-MN terminated" field (PDU session resource modification info-MN terminated). The "MN uplink PDCP user plane tunnel information" field (MN-UL-PDCP-UP-tnlifo) carried in the field includes SNn uplink GTPU tunnels allocated for n-2 SNs in step 4.
6. The n-2 SNs except SNx each allocate a downstream GTPU tunnel for SNn, and send a "secondary node modification request response" message (snodommodificationrequestacknowledgement) for MN termination (MNterminated) to the MN, respectively. And an SN downlink auxiliary cell group user plane tunnel information field (sN-DL-SCG-UP-TNLInfo) carried in the message comprises downlink GTPU tunnels distributed by the SNs SNn.
7, the MN sends an "Xn user plane address indication" message (xuuaddress indication) to the node SNx, and the "MN Xn user plane tunnel information" field (MN-Xn-U-tnlinform m) carried in the message includes the downlink GTPU tunnel allocated by the MN for SNn in step 1 and the downlink GTPU tunnel allocated by each SN for SNn in step 4.
8. In particular, to prevent the problem of user plane packet loss caused during the change of the user plane termination point, the MN should send an "Xn user plane address indication" message (xuandydress indication) to the source user plane termination node SNx, and carry fields of "upstream forwarding user plane tunnel" (ulforwarding uptnl) and "downstream forwarding user plane tunnel" (dlforwarding uptnl), which contain the forwarding tunnel allocated for SNx in step 2 at SNn.
The MN sends the "multiple connection indication" RRCReconfiguration message in step 2 to the terminal.
10. The terminal receives the RRC reconfiguration message, determines that it is "multi-connection indication", establishes a radio resource for SNn, and transmits an RRC reconfiguration complete message (rrcreeconfigurationcomplete) to the MN.
11. The terminal initiates a random access procedure to SNn.
12. In particular, the source user plane terminating node SNx should send a "sequence number status forward" message (SNStatusTransfer) to the MN, which should be forwarded SNn by the MN.
13. In particular, the source user plane termination node SNx should forward the received upstream and downstream user plane data to the SNn assigned forwarding tunnel for SNx obtained in step 7.
14. Since the ue terminating node is changed, the MN shall initiate SNx to SNn PDU Session Path Update procedure (PDU Session Path Update procedure) to Update the ue data Path of the core network to the node SNn. SNn, releasing the original GTPU tunnel in the step 0 after receiving the End Marker packet.
The MN sends a "terminal context release" message (uecontextdelete) to SNx, which releases the relevant terminal context.
16. Up to this point, the "SN terminated" (SNterminated) multi-connection setup with termination node change is completed. And the terminal and the core network can perform multi-connection user plane uplink and downlink data distribution through the MN and the n SNs.
And n is n +1, and according to the steps 1 to 16, more auxiliary nodes can be added continuously to complete the multi-connection establishment of more nodes.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. A method for multiple connections in a mobile communication system, comprising:
step 1: merging the adjacent areas of the main node and all the auxiliary nodes, and sending merged information to a terminal through wireless resource control;
step 2: evaluating the neighbor cell measurement report of the new auxiliary node through the terminal, and judging whether the new auxiliary node is connected or not;
and step 3: for the new auxiliary node which is judged to be connected, establishing wireless resources for connecting the terminal through the new auxiliary node, encapsulating the multi-connection instruction, and informing the main node of the wireless resource establishment condition;
and 4, step 4: coordinating tunnel information of a general wireless packet service tunnel protocol between all the merged auxiliary nodes and the new auxiliary node through the main node, and sending a multi-connection instruction containing the establishment condition of the wireless resource of the new auxiliary node to the terminal through a wireless link established by the main node;
and 5: and the terminal accesses the new auxiliary node according to the wireless resource condition established by the new auxiliary node in the multi-connection instruction to complete the connection of the new auxiliary node.
2. The method of claim 1, wherein the step 2 comprises: if the evaluation result meets the preset condition, initiating a process of adding the evaluation result to the main node to the new auxiliary node; and if the auxiliary node does not meet the preset condition, quitting the auxiliary node adding process.
3. The method of claim 1, wherein the terminal and the core network perform multi-connection user plane uplink and downlink data distribution via the primary node and all connected secondary nodes.
4. The method of claim 1, wherein the receiving the request from the primary node comprises: an auxiliary node adding request, an auxiliary node releasing request and an auxiliary node modifying request.
5. The multi-connection method in a mobile communication system according to claim 1, wherein the tunnel information of the general packet radio service tunneling protocol includes a tunnel IP and a tunnel ID.
6. A multi-connection system in a mobile communication system, comprising:
module M1: merging the adjacent areas of the main node and all the auxiliary nodes, and sending merged information to a terminal through wireless resource control;
module M2: evaluating the neighbor cell measurement report of the new auxiliary node through the terminal, and judging whether the new auxiliary node is connected or not;
module M3: for the new auxiliary node which is judged to be connected, establishing wireless resources for connecting the terminal through the new auxiliary node, encapsulating the multi-connection instruction, and informing the main node of the wireless resource establishment condition;
module M4: coordinating tunnel information of a general wireless packet service tunnel protocol between all the merged auxiliary nodes and the new auxiliary node through the main node, and sending a multi-connection instruction containing the establishment condition of the wireless resource of the new auxiliary node to the terminal through a wireless link established by the main node;
module M5: the terminal provides a baseband processing module for each node, the baseband processing module corresponding to the node accesses the new auxiliary node according to the wireless resource condition established by the new auxiliary node in the multi-connection instruction to complete the connection of the new auxiliary node, the baseband processing modules of the terminal are interconnected by adopting an extensible high-speed data interface, and the wireless packet service data received by each baseband processing module is converged and combined through the interface.
7. The system of claim 6, wherein the decision process in the module M2 comprises: if the evaluation result meets the preset condition, initiating a process of adding the evaluation result to the main node to the new auxiliary node; and if the auxiliary node does not meet the preset condition, quitting the auxiliary node adding process.
8. The multi-connection system in a mobile communication system according to claim 6, wherein the multi-connection user plane uplink and downlink data distribution between the terminal and the core network is performed through the primary node and all the connected secondary nodes.
9. The multi-connection system in a mobile communication system according to claim 6, wherein the primary node receives the request of the secondary node, comprising: an auxiliary node adding request, an auxiliary node releasing request and an auxiliary node modifying request.
10. The multi-connection system in a mobile communication system according to claim 6, wherein the tunnel information of the general packet radio service tunneling protocol includes a tunnel IP and a tunnel ID.
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