Communication processing method and apparatus, device, and readable storage medium

Abstract

Embodiments of the present disclosure provide a communication processing method and apparatus, a device, and a readable storage medium. The method comprises: a first unit of a first node receiving a first message from a third unit of a second node, wherein the first message is used for requesting a handover from the third unit to the first unit, the first node further comprises a second unit used for controlling and / or managing the first unit, the first node is a node serving a first cell, the second node further comprises a fourth unit used for controlling and / or managing the third unit, and the second node is a node serving a second cell; executing a first operation and a second operation on the basis of the first message, wherein the first operation is used for implementing air interface handover, and the second operation is used for implementing context establishment and / or handover link establishment.

Description

Communication processing method, apparatus, device and readable storage medium

[0001] Cross-reference to Related Applications

[0002] The present disclosure claims priority from Chinese Patent Application No. 202410980318.4 filed on July 22, 2024 in China, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] Embodiments of the present disclosure relate to the field of communication technology, in particular to a communication processing method, apparatus, device and readable storage medium. BACKGROUND

[0004] The difficulty of mobile wireless network is how to improve the performance and success rate of handover, reduce handover failure and reconstruction event, which is the difficulty of key technology of wireless mobile network. The current handover improvement scheme focuses on how to reduce the air interface delay or through the dual active protocol stack to realize the reliability and low delay of handover, without fully considering that the delay of handover preparation stage is too large (handover is too late), which leads to handover failure. SUMMARY

[0005] Embodiments of the present disclosure provide a communication processing method, apparatus, device and readable storage medium, which solve the problem of how to reduce the data interruption in the handover process and the delay of the whole handover process.

[0006] In a first aspect, a communication processing method is provided, applied to a first unit of a first node, the first node further comprising a second unit for controlling and / or managing the first unit, the first node being a node serving a first cell, comprising:

[0007] receiving a first message from a third unit of a second node, the first message being used for requesting handover from the third unit to the first unit, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell;

[0008] performing a first operation and a second operation according to the first message, the first operation being used for realizing air interface handover, and the second operation being used for realizing context establishment and / or handover link establishment.

[0009] In a second aspect, a communication processing method is provided, applied to a third unit of a second node, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell, comprising:

[0010] sending a first message to a first unit of a first node, the first message being used to request a handover from a third unit of a second node to the first unit, the second node further comprising a fourth unit used to control and / or manage the third unit, the second node being a node serving a second cell, the first message being further used to trigger the first unit to perform a first operation and a second operation, the first operation being used to implement an air interface handover, and the second operation being used to implement a context setup and / or a handover link setup.

[0011] In a third aspect, a communication processing method is provided, which is applied to a second unit of a first node, the first node further comprising a first unit, the second unit being used to control and / or manage the first unit, the first node being a node serving a first cell, comprising:

[0012] receiving a second message from the first unit, the second message being used to request a terminal context setup, the second message being sent after the first unit receives a first message, the first message being used to request a handover from a third unit of a second node to the first unit, the first message being further used to trigger the first unit to perform a first operation and a second operation, the first operation being used to implement an air interface handover, and the second operation being used to implement a context setup and / or a handover link setup, the second node further comprising a fourth unit used to control and / or manage the third unit, the second node being a node serving a second cell;

[0013] and / or,

[0014] sending a sixth message to a core network element, the sixth message being used to inform the core network element to perform a path switch.

[0015] In a fourth aspect, a communication processing apparatus is provided, which is applied to a first unit of a first node, the first node further comprising a second unit used to control and / or manage the first unit, the first node being a node serving a first cell, comprising: a first transceiver unit and a first processing unit;

[0016] the first transceiver unit is configured to receive a first message from a third unit of a second node, the first message being used to request a handover from the third unit to the first unit, the second node further comprising a fourth unit used to control and / or manage the third unit, the second node being a node serving a second cell;

[0017] the first processing unit is configured to perform a first operation and a second operation according to the first message, the first operation being used to implement an air interface handover, and the second operation being used to implement a context setup and / or a handover link setup.

[0018] In a fifth aspect, a communication processing apparatus is provided, which is applied to a third unit of a second node, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell, comprising a second transceiver unit and a second processing unit;

[0019] The second transceiver unit is configured to send a first message to a first unit of a first node, the first message being used to request a handover from the third unit to the first unit, the first node further comprising a second unit for controlling and / or managing the first unit, the first node being a node serving a first cell, the first message being further used to trigger the first unit to perform a first operation and a second operation, the first operation being used to implement an air interface handover and the second operation being used to implement context establishment and / or handover link establishment.

[0020] In a sixth aspect, a communication processing apparatus is provided, which is applied to a second unit of a first node, the first node further comprising a first unit, the second unit being configured to control and / or manage the first unit, the first node being a node serving a first cell, comprising a third transceiver unit and a third processing unit;

[0021] The third transceiver unit is configured to receive a second message from the first unit, the second message being used to request establishment of a terminal context, the second message being sent after the first unit receives a first message, the first message being used to request a handover from the third unit to the first unit, the first message being further used to trigger the first unit to perform a first operation and a second operation, the first operation being used to implement an air interface handover and the second operation being used to implement context establishment and / or handover link establishment, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell;

[0022] and / or,

[0023] sending a sixth message to a core network element, the sixth message being used to inform the core network element to perform path switching.

[0024] In a seventh aspect, a communication device is provided, comprising a processor, a memory, and a program or instructions stored in the memory and executable on the processor, the program or instructions being executed by the processor to implement the steps of the method according to the first aspect or the second aspect or the third aspect.

[0025] In an eighth aspect, a readable storage medium is provided, the readable storage medium storing a program or instructions, the program or instructions being executed by a processor to implement the steps of the method according to the first aspect or the second aspect or the third aspect.

[0026] In a ninth aspect, a computer program product is provided, comprising computer instructions which, when executed by a processor, implement the steps of the method according to the first aspect or the second aspect or the third aspect.

[0027] In the present disclosure, the first unit of the first node receives a first message from the third unit, the first message being used to request switching from the third unit to the first unit, the first unit performs a first operation and a second operation according to the first message, the first operation being used to implement air interface switching, and the second operation being used to implement context establishment and / or switching link establishment, which realizes parallel design of at least one process in the switching preparation process, the switching execution stage and the switching completion stage in the switching process, effectively reduces switching delay, reduces data transmission interruption and signaling delay of the whole switching process, and improves switching reliability. BRIEF DESCRIPTION OF DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered limitations of the present disclosure. Moreover, throughout the drawings, like reference numerals refer to similar or like components. In the drawings:

[0029] FIG. 1 is one of the switching process diagrams in the related art;

[0030] FIG. 2 is another of the switching process diagrams in the related art;

[0031] FIG. 3 is a schematic diagram of a wireless network architecture provided by an embodiment of the present disclosure;

[0032] FIG. 4 is a schematic diagram of an xNB-DU provided by an embodiment of the present disclosure;

[0033] FIG. 5 is one of the flowcharts of the communication processing method provided by an embodiment of the present disclosure;

[0034] FIG. 6 is another of the flowcharts of the communication processing method provided by an embodiment of the present disclosure;

[0035] FIG. 7 is a third of the flowcharts of the communication processing method provided by an embodiment of the present disclosure;

[0036] FIG. 8 is a fourth of the flowcharts of the communication processing method provided by an embodiment of the present disclosure;

[0037] FIG. 9 is a schematic diagram of a data packet format of newly defined user plane data forwarding provided by an embodiment of the present disclosure;

[0038] FIG. 10 is a comparison diagram of the original data forwarding process and the new data forwarding process;

[0039] FIG. 11 is a data flow comparison diagram of downlink data before and after data path switching in a handover process;

[0040] FIG. 12 is a schematic diagram of a communication processing device according to an embodiment of the present disclosure;

[0041] FIG. 13 is a schematic diagram of a communication processing device according to another embodiment of the present disclosure;

[0042] FIG. 14 is a schematic diagram of a communication processing device according to another embodiment of the present disclosure;

[0043] FIG. 15 is a schematic diagram of a communication device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present disclosure.

[0045] The term “comprising” and any variation thereof in the specification and claims of the present disclosure is intended to cover a non-exclusive inclusion, for example, a process, method, system, product or apparatus that includes a list of steps or units need not be limited to those clearly listed, but can include other steps or units not clearly listed or inherent to such processes, methods, products or apparatus. In addition, the use of “and / or” in the specification and claims means at least one of the connected objects, for example, A and / or B means three cases including A alone, B alone, and A and B both.

[0046] In the embodiments of the present disclosure, the word “exemplary” or “for example” is used to mean serving as an example, instance or illustration. Any embodiment or design solution described as “exemplary” or “for example” in the embodiments of the present disclosure should not be interpreted as being more preferred or advantageous than other embodiments or design solutions. Rather, the word “exemplary” or “for example” is used to present relevant concepts in a specific manner.

[0047] A difficulty of mobile wireless networks is how to improve the performance and success rate of handover, reduce handover failure and re-establishment events. In order to ensure the reliability and low latency of handover, various handover enhancement schemes are provided in the related art, such as a conditional handover (CHO) scheme, a dual active protocol stack (DAPS), a layer one and layer two triggered mobility (LTM) scheme, etc. Referring to FIG. 1 and FIG. 2, a handover flowchart in the related art is introduced. In FIG. 1, handover preparation includes steps 1-7, handover execution includes steps 7a-8, and handover completion includes steps 8a-12. In the handover flowchart shown in FIG. 2, 19 handover signaling messages are required, and 7 messages are required from handover decision to start of air interface synchronization.

[0048] Embodiments of the present disclosure provide a new wireless network architecture, as shown in FIG. 3, which includes an xNB and a core network (NGC), the xNB includes an xNB-centralized unit (CU) and one or more xNB-distributed units (DUs), there is an N2 interface between the xNB-CU and the NGC, there is an N3 interface between the xNB-DU and the NGC, there is an F1-C interface between the xNB-CU and the xNB-DU, there is a DN interface between different xNB-DUs in the same xNB, and there is an xNB-DN interface between xNB-DUs of different xNBs.

[0049] In the present embodiment, a new DN interface is added between DUs, and the DN interface can include a DN-C and a DN-U, the DN-C and the DN-U respectively perform data transmission of the inter- DU control part and the data part.

[0050] In the present embodiment, the inter-DN interface established between base stations interacts with the inter-DN neighbor cell information configuration through a distributed unit setup procedure (DN SETUP PROCEDURE) or a distributed unit configuration update procedure (DN Configuration Update procedure) flow, which is used for target cell selection, message routing and data forwarding between inter-DN handover flows.

[0051] In the embodiment, the CU-CU and DU functions can be combined, and the xNB-DU function implements the DU and Service Data Adaptation Protocol (SDAP), Packet Data Convergence Protocol (PDCP), and Radio Link Control (RLC) functions, as shown in FIG. 4, which is an example of generating an xNB-DU by combining the CU-CU and DU functions.

[0052] Referring to FIG. 5, the embodiment of the disclosure provides a communication processing method, applied to a first unit of a first node, the first node further comprising a second unit for controlling and / or managing the first unit, the first node being a node serving a first cell, and the specific steps comprise:

[0053] Step 51: receiving a first message from a third unit of a second node, the first message being used for requesting switching from the third unit to the first unit, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell;

[0054] Optionally, the first message comprises terminal context information of the second cell.

[0055] Optionally, the first cell is a target cell, the first node is a base station serving the target cell, the first unit is a first DU, i.e., a DU of the target cell (T-DU), and the second unit is a first CU, i.e., a CU of the target cell (T-CU). The second cell is a source cell, the second node is a base station serving the source cell, the third unit is a second DU, i.e., a DU of the source cell (S-DU), and the fourth unit is a second CU, i.e., a CU of the source cell (S-CU).

[0056] Optionally, the first unit and the third unit can be an xNB-DU as shown in FIGS. 3 and 4, and the second unit and the fourth unit can be an xNB-CU as shown in FIG. 3.

[0057] Optionally, the first message can also be referred to as a DU HANDOVER REQUEST message, and the terminal context of the second cell can also be referred to as DU UE context information.

[0058] Step 52: performing a first operation and a second operation according to the first message, the first operation being used for implementing air interface switching, and the second operation being used for implementing context establishment and / or switching link establishment.

[0059] Optionally, the second operation is used to implement CU context establishment.

[0060] Optionally, in the case that the third unit receives the measurement report, judges that inter-base station handover is needed, and there is a DN interface between the third unit and the first unit, the third unit can send a first message to the first unit.

[0061] In the embodiment, the content carried in the first message can be used by the first unit to perform at least one of the following: 1) allocate user resources; 2) whether to update configuration parameters after handover succeeds, that is, by carrying the terminal context of the source cell in the message requesting handover, the parallel design of the handover preparation process, the handover execution stage and the handover completion stage in the handover process is realized, which has lower handover delay, reduces the data transmission interruption of the entire handover process and the signaling delay of the handover process, and realizes the reliability and high performance of handover.

[0062] In an embodiment of the present disclosure, the terminal context of the second cell includes at least one of the following:

[0063] 1) resource information allocated by the fourth unit of the second cell;

[0064] 2) resource information allocated by the third unit of the second cell;

[0065] 3) bearer service information, optionally, the bearer service information includes but is not limited to at least one of the following: quality of service requirement, bandwidth allocation, priority rule, data processing rule, etc.

[0066] 4) configuration information, optionally, the configuration information includes but is not limited to at least one of the following: radio access network configuration, quality of service (QoS) configuration, interface configuration, scheduling configuration, etc.

[0067] In an embodiment of the present disclosure, performing the second operation includes at least one of the following:

[0068] 1) the first unit sends a second message to the second unit, the second message being used to request to establish a terminal context;

[0069] 2) the first unit receives a third message from the second unit, the third message being used to respond to the request to establish a terminal context;

[0070] 3) the first unit receives downlink data sent by a core network element through a transmission link after handover.

[0071] Optionally, the transmission link after handover refers to a path switched to in the path switching process between the first unit and the core network element in the handover execution stage.

[0072] Optionally, the core network element switches the downlink data transmission link at the same time of sending the PATH SWITCH SETUP REQUSET ACKNOWLEDGE message, and transmits the downlink data on the new link after the switching. In the switching execution phase, the path switching is performed in parallel, and the existing scheme is to perform the path switching after the switching is successful. In the embodiment, the path switching of the data link is earlier than the existing scheme, the switching path is converted in the switching execution phase, the amount of data is reduced, and the transmission link pressure is optimized; further, the switching path is established in the switching process, and the switching failure caused by the failure of the link establishment between the core network and the switching path in the switching process can be avoided.

[0073] Optionally, the core network element includes but is not limited to an Access and Mobility Management Function (AMF) and / or a User Plane Function (UPF).

[0074] The second message can also be referred to as an F1 UE Context Setup request message.

[0075] The third message can also be referred to as an F1 UE Context Setup response message.

[0076] In an embodiment of the present disclosure, the second message includes at least one of the following:

[0077] 1) a transport network layer (TNL) address of the first unit for switching the downlink data link;

[0078] 2) resources allocated by the first unit for the user establishment process;

[0079] 3) configuration information of the first unit for the user establishment process;

[0080] Optionally, the configuration information includes but is not limited to at least one of the following: QoS parameter configuration, security configuration, session parameter configuration, transmission configuration, etc.

[0081] 4) information of the fourth unit.

[0082] It can be understood that the content carried in the second message can be used for resource allocation and processing by the second unit.

[0083] In an embodiment of the present disclosure, the third message includes at least one of the following:

[0084] 1) a handover uplink TNL address allocated by the core network;

[0085] 2) a resource allocated by the second unit;

[0086] 3) configuration information, optionally, the configuration information includes at least one of the following: bandwidth configuration, QoS parameter setting, security configuration, session management parameter, etc.

[0087] In an embodiment of the present disclosure, performing the first operation includes at least one of the following:

[0088] The first unit sends a fourth message in response to the first message to the third unit, the fourth message being used to trigger the third unit to perform a third operation and stop air interface data transmission in the source cell, the third operation being used to implement data forwarding;

[0089] The first unit performs a fourth operation, the fourth operation being used to trigger a handover random access of the terminal.

[0090] The fourth message can also be referred to as a DU HANDOVER RESPONSE message.

[0091] In an embodiment of the present disclosure, in the case of data forwarding, triggering the third unit to perform the third operation includes at least one of the following:

[0092] 1) the third unit sends a fifth message to the first unit, the fifth message being used to indicate a transmission state of the data packet;

[0093] Optionally, the transmission state of the data packet includes at least one of the following: a data packet sequence number that has been successfully transmitted, and which data packets have not been successfully transmitted or need to be retransmitted;

[0094] Optionally, the fifth message includes at least one of the following: a data packet sequence number (Sequence Number) and a corresponding transmission state. Through the message, the transmission state of the data packet of a specific sequence number, such as successful transmission, retransmission or non-transmission, can be understood, so as to effectively manage and adjust the data packet transmission.

[0095] 2) in the data forwarding process, the third unit sends a data packet to the first unit, the data packet being in the format of a Medium Access Control (MAC) Service Data Unit (SDU).

[0096] In the embodiment, the path of data forwarding in the handover process is shorter, and the accuracy of data forwarding is higher. The data forwarding is directly forwarded between DUs, while in the prior art, the transmission of the source cell DU data packet to the target DU needs to go through the XN interface and the F1 interface. The embodiment can directly transmit through the newly added DN interface, so that the path of data forwarding in the handover process is shorter, and the accuracy of data forwarding is higher. Further, the data transmission link of the embodiment is shorter during the time period from the handover execution to the handover completion, and the improvement of the system base station transmission performance is more obvious, especially in the case of high speed.

[0097] In the embodiment, the forwarded data packet is an SDU data packet of the MAC layer, while the original flow data forwarding is a data packet of the PDCP (Packet Data Convergence Protocol) layer. Compared with the new flow data forwarding, the data volume of the new flow data forwarding is smaller, the accuracy is higher, and the performance of the handover is better.

[0098] The fifth message can also be referred to as a DU SN STATUS TRANSFER message.

[0099] In the embodiment, at least one of the handover preparation process, the handover execution stage and the handover completion stage in the handover process is designed in parallel, which can effectively reduce the handover delay, reduce the data transmission interruption and the signaling delay of the handover process, and improve the reliability of the handover.

[0100] Referring to FIG. 6, an embodiment of the disclosure provides a communication processing method applied to a third unit of a second node, wherein the second node further comprises a fourth unit for controlling and / or managing the third unit, the second node is a node serving a second cell, and the specific steps comprise the following step 61.

[0101] Step 61: a first message is sent to a first unit of a first node, the first message is used to request switching from the third unit to the first unit, the first node further comprises a second unit for controlling and / or managing the first unit, the first node is a node serving a first cell, and the first message is further used to trigger the first unit to perform a first operation and a second operation, the first operation is used to realize air interface handover, and the second operation is used to realize context establishment and / or handover link establishment.

[0102] Optionally, the first message comprises terminal context information of the second cell.

[0103] Optionally, the first cell is a target cell, the first node is a base station serving the target cell, the first unit is a first DU, i.e., a DU of the target cell (T-DU), and the second unit is a first CU, i.e., a CU of the target cell (T-CU). The second cell is a source cell, the second node is a base station serving the source cell, the third unit is a second DU, i.e., a DU of the source cell (S-DU), and the fourth unit is a second CU, i.e., a CU of the source cell (S-CU).

[0104] In an embodiment of the present disclosure, the first unit performing the second operation includes at least one of the following:

[0105] The first unit sends a second message to the second unit, the second message being used to request establishment of a terminal context.

[0106] The first unit receives a third message from the second unit, the third message being used to respond to the request for establishment of the terminal context.

[0107] The first unit receives downlink data sent by a core network element through the transmission link after the handover.

[0108] In an embodiment of the present disclosure, the first message includes terminal context information of the second cell.

[0109] In an embodiment of the present disclosure, the terminal context of the second cell includes at least one of the following:

[0110] 1) resource information allocated by the fourth unit of the second cell;

[0111] 2) resource information allocated by the third unit of the second cell;

[0112] 3) bearer service information;

[0113] 4) configuration information, optionally, the configuration information includes but is not limited to at least one of the following: radio access network configuration, QoS configuration, interface configuration, scheduling configuration, etc.

[0114] Optionally, the second message includes at least one of the following: a TNL address of downlink data link switching allocated by the first unit, resource allocated by the first unit for the user establishment process, configuration information of the user establishment process performed by the first unit, and information of the fourth unit.

[0115] Optionally, the third message includes at least one of the following: a handover uplink TNL address allocated by the core network, resource allocated by the second unit, and configuration information.

[0116] In an embodiment of the present disclosure, the method further includes:

[0117] receiving, from the first unit, a fourth message in response to the first message;

[0118] performing a third operation and a fourth operation according to the fourth message, and stopping transmission of air interface data in the source cell, the third operation being used for realizing data forwarding, and the fourth operation being used for triggering handover random access of the terminal.

[0119] The fourth message can also be referred to as a DU HANDOVER RESPONSE message.

[0120] In an embodiment of the present disclosure, performing the third operation comprises at least one of the following:

[0121] 1) the third unit sends a fifth message to the first unit, the fifth message being used for indicating a transmission state of the data packet;

[0122] 2) the third unit sends the data packet to the first unit in the data forwarding process, the data packet being in the format of an SDU of a MAC.

[0123] The fifth message can also be referred to as a DU SN STATUS TRANSFER message.

[0124] In the embodiment, a data packet format of user plane data forwarding is newly defined, the data packet format being an SDU of a MAC, wherein a length of a sequence number (SN) is not limited in the new format, and a specific message format field arrangement is shown in FIG. 9.

[0125] In the embodiment, at least one of the handover preparation process, the handover execution stage and the handover completion stage in the handover process is designed in parallel, which can effectively reduce the handover delay, reduce the data transmission interruption and the signaling delay of the entire handover process, and improve the reliability of the handover.

[0126] Referring to FIG. 7, an embodiment of the present disclosure provides a communication processing method, applied to a second unit of a first node, the first node further comprising a first unit, the second unit being used for controlling and / or managing the first unit, the first node being a node serving a first cell, and the specific steps comprising: step 71.

[0127] Step 71: receiving, from the first unit, a second message, the second message being used for requesting establishment of a terminal context, the second message being sent after the first unit receives the first message, the first message being used for requesting switching from the third unit to the first unit, the first message also being used for triggering the first unit to perform a first operation and a second operation, the first operation being used for implementing an air interface switching and the second operation being used for implementing context establishment and / or switching link establishment, the second node further comprising a fourth unit used for controlling and / or managing the third unit, the second node being a node serving a second cell; and / or, sending, to a core network element, a sixth message, the sixth message being used for notifying the core network element to perform path switching.

[0128] For example, the second unit of the first node sends the sixth message to the core network element after the second unit receives the second message from the first unit.

[0129] Optionally, the sixth message comprises TNL address information of a downlink switching link switching allocated by the first unit.

[0130] Optionally, the first message comprises terminal context information of the second cell.

[0131] Optionally, the first cell is a target cell, the first node is a base station serving the target cell, the first unit is a first DU, i.e., a DU of the target cell (T-DU), and the second unit is a first CU, i.e., a CU of the target cell (T-CU). The second cell is a source cell, the second node is a base station serving the source cell, the third unit is a second DU, i.e., a DU of the source cell (S-DU), and the fourth unit is a second CU, i.e., a CU of the source cell (S-CU).

[0132] Optionally, the first message can also be referred to as a DU HANDOVER REQUEST message, and the terminal context of the second cell can also be referred to as DU UE context information.

[0133] In an embodiment of the present disclosure, the first unit performing the second operation comprises at least one of the following:

[0134] 1) the first unit sends, to the second unit, a second message, the second message being used for requesting establishment of a terminal context;

[0135] 2) the first unit receives, from the second unit, a third message, the third message being used for responding to the request for establishment of the terminal context;

[0136] 3) the first unit receives downlink data sent by a core network element through a transmission link after switching.

[0137] The second message can also be referred to as an F1 UE Context Setup request message.

[0138] The third message can also be referred to as an F1 UE Context Setup response message.

[0139] In an embodiment of the present disclosure, the second message comprises at least one of the following:

[0140] 1) a TNL address of a downlink data link allocated by the first unit for switching;

[0141] 2) resources allocated by the first unit for a user setup process;

[0142] 3) configuration information of the user setup process performed by the first unit;

[0143] 4) information of a fourth unit.

[0144] In an embodiment of the present disclosure, the third message comprises at least one of the following:

[0145] 1) an uplink TNL address allocated by the core network for switching;

[0146] 2) resources allocated by the second unit;

[0147] 3) configuration information.

[0148] In an embodiment of the present disclosure, the first message comprises terminal context information of the second cell.

[0149] In an embodiment of the present disclosure, the second message comprises at least one of the following: a TNL address of a downlink data link allocated by the first unit for switching, resources allocated by the first unit for a user setup process, configuration information of the user setup process performed by the first unit, information of a fourth unit.

[0150] In this embodiment, at least one of the switching preparation process, the switching execution stage and the switching completion stage in the switching process is designed in parallel, which can effectively reduce the switching delay, reduce the data transmission interruption and the signaling delay of the whole switching process, and improve the reliability of the switching.

[0151] In an embodiment of the present disclosure, the first operation performed by the first unit comprises at least one of the following:

[0152] The first unit sends a fourth message in response to the first message to the third unit, and the fourth message is used to trigger the third unit to perform a third operation and stop the transmission of air interface data in the source cell, and the third operation is used to realize data forwarding.

[0153] The first unit performs a fourth operation for triggering a handover random access of the terminal.

[0154] In an embodiment of the present disclosure, the third operation comprises at least one of:

[0155] 1) sending a fifth message to the first unit, the fifth message being used for indicating a transmission state of the data packet;

[0156] 2) sending the data packet to the first unit in a data front transmission process, the data packet being in a format of an SDU of a MAC.

[0157] Hereinafter, the first unit is taken as a first DU (i.e., a T-DU), the second unit is taken as a first CU (i.e., a T-CU), the third unit is taken as a second DU (i.e., an S-DU), and the fourth unit is taken as a second CU (i.e., an S-CU) as an example.

[0158] The embodiment proposes a DU-triggered parallel handover process scheme, and parallel processes of a handover preparation process, a handover execution stage, and a handover completion stage in the handover process are realized through process parallelization design. Compared with a traditional handover, the parallel handover process has a lower handover delay, reduces data transmission interruption and signaling delay of the handover process, and realizes reliability and high performance of the handover.

[0159] Referring to FIG. 8, the specific steps are as follows:

[0160] Step 1: The S-DU (source DU) sends a DU HANDOVER REQUEST message (i.e., a first message) to the T-DU (target DU).

[0161] The S-DU receives the measurement report message, determines that inter-base-station handover is needed, and that there is a DN interface between the S-DU and the T-DU, and performs a handover process based on the DN interface, and sends a DU HANDOVER REQUEST message to the T-DU.

[0162] Optionally, the message contains DU UE context information, that is, at least one of information of related resources allocated by the CU and / or the DU, information of a bearer service, and configuration information, so as to facilitate the T-DU to perform user resource allocation and a reconfiguration process of whether to update the configuration parameters after the handover succeeds.

[0163] The base station in the present disclosure includes but is not limited to a drone base station, a satellite, an aerial platform, and the like. A new handover process is introduced through the base station, a high-efficiency mobility management process is realized, and the quality of service communication is guaranteed.

[0164] Step 2: After receiving the DU HANDOVER REQUEST message, the T-DU performs at least one of the following: user handover related resource allocation, admission control, establishment of the DU related user context, allocation of the TNL address of the handover data forwarding destination, allocation of the TNL address of the handover downlink data link establishment, and the like; and triggers the 2.a (air interface handover) process (i.e., the first operation) and / or the 2.b (CU context establishment and handover link establishment) process (i.e., the second operation).

[0165] The 2.b process described above includes steps 2.b-2.f, which implement the CU context establishment and handover link establishment process.

[0166] Step 2.b: The T-DU sends an F1 UE Context Setup request message (i.e., the second message) to the T-CU (destination CU), which carries at least one of the following: the TNL address of the downlink data link allocated by the T-DU for handover, the resources and / or configuration information allocated by the T-DU for the user establishment process, and S-CU (source CU) information. Optionally, the information carried in the message can be used by the T-CU for resource allocation and / or processing.

[0167] Step 2.c: After receiving the F1 UE Context Setup request message, the T-CU performs at least one of the following according to the information carried in the message: CU resource allocation, configuration parameter update, establishment of the CU user context, and sending a PATH SWITCH SETUP REQUSET message (i.e., the sixth message) to the core network. Optionally, the TNL address information of the downlink handover link allocated by the T-DU is carried in the PATH SWITCH SETUP REQUSE message.

[0168] Step 2.e: After receiving the PATH SWITCH SETUP REQUSET message, the core network performs at least one of the following: establishment of the core network user context, allocation of the TNL address information of the user plane uplink handover link, sending a PATH SWITCH SETUP REQUSE ACKNOWLEDGE message to the destination T-CU, notifying the S-DU to send end marker data packets on the data transmission link established between the S-DU and the core network, and stopping data transmission on the original link.

[0169] Step 2.d: After receiving the PATH SWITCH SETUP REQUSET ACKNOWLEDGE message sent by the core network, the T-CU sends an F1 UE Context Setup response message (i.e., the third message) to the T-DU. Optionally, the message carries at least one of the following: the switch uplink TNL address information allocated by the core network user plane, the related resource and / or configuration information allocated by the target CU. After receiving the message, the T-DU performs the configuration update process of the information related parameters, and realizes the user establishment and / or data link maintenance process of the switch user in the target base station.

[0170] Step 2.f: At the same time or before or after the core network sends the PATH SWITCH SETUP REQUSET ACKNOWLEDGE message, the downlink data transmission link is switched, and the downlink data is transmitted on the new link after the switching.

[0171] 2.a flow: the random access (step 3.a) flow of the terminal and the data forwarding process (steps 3.b-3.c) flow are realized.

[0172] Step 2.a: The T-DU sends a DU HANDOVER RESPONSE message (i.e., the fourth message) to the S-DU through the allocated data forwarding destination TNL address. Optionally, the message can carry at least one of the following: the data forwarding destination TNL address and the switching reconfiguration message content. According to the data forwarding destination TNL address and / or the switching reconfiguration message content carried by the DU HANDOVER RESPONSE message, the cell of the source DU (S-DU) triggers two respective parallel flows: the data forwarding (steps 3.b-3.c) flow (i.e., the third operation) and the switching air interface RACH (step 3.a) flow (i.e., the fourth operation), and stops the air interface data transmission in the source cell.

[0173] It can be understood that step 2.a can be after step 2.b and before step 2.d, or step 2.a can be after step 2.d. The order of step 2.a is not specifically limited in this embodiment.

[0174] Subflow (3.b) data forwarding flow:

[0175] Step 3.b: The S-DU sends a DU SN STATUS TRANSFER message (i.e., the fifth message) to the T-DU, and then performs the data forwarding process of the new defined data packet format between the S-DU and the T-DU by using the TNL link of the data forwarding.

[0176] The data forwarding format is the SDU data packet of the MAC, and the SN sequence number has no length limit in the new format.

[0177] Sub-process (3.a) switches the air interface RACH process:

[0178] Step 3.a: the terminal performs the RACH process with the T-DU for random access. After the RACH is successful, the release process of the user after the T-DU switching is triggered (steps 4-5).

[0179] The terminal in the embodiment of the present disclosure includes various terminals with mobility, such as a mobile phone, a car, and the like.

[0180] The parallel switching process provided in the embodiment reduces the signaling messages from 19 messages (as shown in FIG. 2) to 5 messages (as shown in FIG. 8) compared with the prior art solution. The number of messages in the embodiment is about 26% of the prior art solution, which reduces the switching delay.

[0181] In the embodiment, the switching preparation delay is smaller. From the switching decision to the start of air interface synchronization, the prior art solution needs 7 messages (as shown in FIG. 2), and the embodiment only needs 2 messages (as shown in FIG. 8). The number of messages in the embodiment is less than 29% of the original solution, which can effectively improve the switching success rate and avoid switching failure caused by too late switching.

[0182] In the embodiment, the path of data forwarding during the switching process is shorter, and the accuracy of data forwarding is higher. Referring to FIG. 10, the data forwarding in the embodiment is directly forwarded between DUs, while in the prior art, the transmission of the source cell DU data packet to the destination DU needs to go through the XN interface and the F1 interface. In the embodiment, the data is directly transmitted through the newly added DN interface.

[0183] In the embodiment, the data packet of the forwarding is the SDU data packet of the MAC layer, while in the prior art, the data forwarding is the data packet of the PDCP layer. Compared with the prior art, the data forwarding in the embodiment has less data volume, higher accuracy, and better switching performance.

[0184] In the embodiment, the path switching is performed in parallel during the switching execution phase, while in the prior art, the path switching is performed after the switching is successful. The path switching of the data link is earlier than the original solution, and the switching path is converted during the switching execution phase, which reduces the data volume of the data forwarding and optimizes the transmission link pressure.

[0185] In the embodiment, the link during the switching execution to the switching completion is shorter, and the data transmission link is shorter, especially in the high-speed case, which is more obvious for the system base station transmission performance. As shown in FIG. 11, the data flow comparison of the downlink data before and after the data path switching during the switching process. Before the path switching, the data volume is transmitted and processed to the source cell base station N3 and the XN interface.

[0186] The establishment of the switching path in the switching process can avoid switching failure caused by failure of link establishment between the core network and the first node.

[0187] Referring to FIG. 12, an embodiment of the present disclosure provides a communication processing apparatus, applied to a first unit of a first node, the first node further comprising a second unit for controlling and / or managing the first unit, the first node being a node serving a first cell, the apparatus 1200 comprising: a first transceiving unit 1201 and a first processing unit 1202;

[0188] The first transceiving unit 1201 is configured to receive a first message from a third unit of a second node, the first message being used for requesting switching from the third unit to the first unit, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell.

[0189] The first processing unit 1202 is configured to perform a first operation and a second operation according to the first message, the first operation being used for realizing air interface switching, and the second operation being used for realizing context establishment and / or switching link establishment.

[0190] Optionally, the first message comprises terminal context information of the second cell.

[0191] In an embodiment of the present disclosure, the terminal context of the source cell comprises at least one of the following:

[0192] 1) resource information allocated by the fourth unit of the second cell;

[0193] 2) resource information allocated by the third unit of the second cell;

[0194] 3) bearer service information;

[0195] 4) configuration information.

[0196] In an embodiment of the present disclosure, performing the second operation comprises at least one of the following:

[0197] 1) the first unit sends a second message to the second unit, the second message being used for requesting establishment of terminal context;

[0198] 2) the first unit receives a third message from the second unit, the third message being used for responding to the request for establishing terminal context;

[0199] 3) the first unit receives downlink data sent by a core network element through a transmission link after switching.

[0200] In an embodiment of the present disclosure, the second message comprises at least one of the following:

[0201] 1) the first unit assigned downlink data link switching TNL address;

[0202] 2) the first unit assigned resource in user establishment process;

[0203] 3) the first unit configured information in user establishment process;

[0204] 4) fourth unit information.

[0205] In an embodiment of the present disclosure, the third message comprises at least one of the following:

[0206] 1) core network assigned switching uplink TNL address;

[0207] 2) the second unit assigned resource;

[0208] 3) configuration information.

[0209] In an embodiment of the present disclosure, performing the first operation comprises at least one of the following:

[0210] The first unit sends a fourth message in response to the first message to the third unit, the fourth message is used to trigger the third unit to perform a third operation, and stop air interface data transmission in the source cell, the third operation is used to realize data forwarding;

[0211] The first unit performs a fourth operation, the fourth operation is used to trigger terminal switching random access.

[0212] In an embodiment of the present disclosure, the third operation comprises at least one of the following:

[0213] 1) receiving a fifth message from the third unit, the fifth message is used to indicate data packet transmission state;

[0214] 2) receiving data packet from the third unit in data forwarding process, the data packet is in the format of MAC SDU.

[0215] The apparatus provided by the embodiments of the present disclosure can realize each process realized by the method embodiment shown in FIG. 5 and achieve the same technical effects. To avoid repetition, details are not described here.

[0216] Referring to FIG. 13, the embodiments of the present disclosure provide a communication processing apparatus, applied to a third unit of a second node, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell, the apparatus 1300 comprising a second transceiver unit 1301 and a second processing unit 1302.

[0217] The second transceiver unit 1301 is configured to send a first message to the first unit, the first message being used to request switching from the third unit to the first unit, the first node further comprising a second unit configured to control and / or manage the first unit, the first node being a node serving a first cell, the first message being further used to trigger the first unit to perform a first operation and a second operation, the first operation being used to implement an air interface switching, and the second operation being used to implement context establishment and / or switching link establishment.

[0218] In an embodiment of the present disclosure, the second operation comprises at least one of:

[0219] The first unit sends a second message to the second unit, the second message being used to request establishing a terminal context.

[0220] The first unit receives a third message from the second unit, the third message being used to respond to the request of establishing the terminal context.

[0221] The first unit receives downlink data sent by a core network element through the switched transmission link.

[0222] In an embodiment of the present disclosure, the first message comprises terminal context information of a second cell.

[0223] In an embodiment of the present disclosure, the terminal context of the second cell comprises at least one of:

[0224] 1) resource information allocated by a fourth unit of the second cell;

[0225] 2) resource information allocated by a third unit of the second cell;

[0226] 3) bearer service information;

[0227] 4) configuration information.

[0228] Optionally, the second message comprises at least one of: a TNL address of downlink data link switching allocated by the first unit, resource allocated by the first unit for a user establishment process, configuration information of the user establishment process by the first unit, and information of the fourth unit.

[0229] Optionally, the third message comprises at least one of: a switching uplink TNL address allocated by the core network, resource allocated by the second unit, and configuration information.

[0230] In an embodiment of the present disclosure, the second transceiver unit 1301 is further configured to receive a fourth message from the first unit in response to the first message.

[0231] The second processing unit 1302 is configured to perform a third operation and a fourth operation, and stop transmission of the air interface data in the source cell, the third operation being configured to implement data forwarding, and the fourth operation being configured to trigger a handover random access of the terminal.

[0232] In an embodiment of the present disclosure, the third operation comprises at least one of the following:

[0233] 1) sending a fifth message to the first unit, the fifth message being configured to indicate a distributed unit sequence number state transition;

[0234] 2) sending a data packet to the first unit in the data forwarding process, the data packet being in the format of an SDU of a MAC.

[0235] The apparatus provided by the embodiments of the present disclosure can implement each process of the method embodiments shown in FIG. 6 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0236] Referring to FIG. 14, the embodiments of the present disclosure provide a communication processing apparatus, applied to a second unit of a first node, the first node further comprising a first unit, the second unit being configured to control and / or manage the first unit, the first node being a node serving a first cell, the apparatus 1400 comprising a third transceiver unit 1401 and a third processing unit 1402.

[0237] The third transceiver unit 1401 is configured to receive a second message from the first unit, the second message being configured to request establishment of a terminal context, the second message being sent by the first unit after receiving a first message, the first message being configured to request switching from a third unit to the first unit, the first message further being configured to trigger the first unit to perform a first operation and a second operation, the first operation being configured to implement air interface switching, and the second operation being configured to implement context establishment and / or handover link establishment, the second node further comprising a fourth unit configured to control and / or manage the third unit, the second node being a node serving a second cell; and / or send a sixth message to a core network element, the sixth message being configured to notify the core network element to perform path switching.

[0238] In an embodiment of the present disclosure, the second operation comprises at least one of the following:

[0239] 1) the first unit sends a second message to the second unit, the second message being configured to request establishment of a terminal context;

[0240] 2) the first unit receives a third message from the second unit, the third message being configured to respond to the request for establishment of the terminal context;

[0241] 3) the first unit receives downlink data sent by the core network network element through the switched transmission link.

[0242] In an embodiment of the disclosure, the second message comprises at least one of the following:

[0243] 1) a TNL address of the switched downlink data link allocated by the first unit;

[0244] 2) resources allocated by the first unit for the user establishment process;

[0245] 3) configuration information of the user establishment process by the first unit;

[0246] 4) information of the fourth unit

[0247] In an embodiment of the disclosure, the third message comprises at least one of the following:

[0248] 1) an uplink TNL address allocated by the core network for switching;

[0249] 2) resources allocated by the second unit;

[0250] 3) configuration information.

[0251] In an embodiment of the disclosure, the first message comprises terminal context information of the second cell.

[0252] In an embodiment of the disclosure, the second message comprises at least one of the following: a TNL address of the switched downlink data link allocated by the first unit, resources allocated by the first unit for the user establishment process, configuration information of the user establishment process by the first unit, information of the fourth unit.

[0253] The apparatus provided by the embodiments of the disclosure can implement each process implemented by the method embodiments shown in FIG. 7 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0254] As shown in FIG. 15, the embodiments of the disclosure further provide a communication device 1500, which comprises a processor 1501, a memory 1502, a program or instruction stored in the memory 1502 and executable on the processor 1501. When the program or instruction is executed by the processor 1501, each process of the above-mentioned method embodiments of FIG. 5 or FIG. 6 or FIG. 7 is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described herein.

[0255] The embodiment of the present disclosure further provides a readable storage medium, which stores a program or instructions, and the program or instructions are executed by a processor to implement each process of the method embodiments shown in FIG. 5 or FIG. 6 or FIG. 7, and achieve the same technical effects. To avoid repetition, details are not described herein.

[0256] The processor is the processor in the terminal in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, etc.

[0257] The steps of the methods or algorithms described in connection with the present disclosure can be embodied in hardware, or can be executed by software in the processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a RAM, a flash memory, a ROM, an erasable programmable read-only memory (Erasable Programmable Read Only Memory, EPROM), an electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), a register, a hard disk, a mobile hard disk, a read-only optical disk, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be carried in an application specific integrated circuit (Application Specific Integrated Circuit, ASIC). In addition, the ASIC can be carried in the core network interface device. Of course, the processor and the storage medium can also exist as discrete components in the core network interface device.

[0258] Those skilled in the art should realize that the functions described in the present disclosure can be implemented in hardware, software, firmware or any combination thereof in one or more examples described above. When implemented in software, these functions can be stored in a computer readable medium or transmitted as one or more instructions or codes on a computer readable medium. The computer readable medium includes a computer storage medium and a communication medium, wherein the communication medium includes any medium that facilitates the transfer of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general or special purpose computer.

[0259] The specific implementation described above further details the purposes, technical solutions, and beneficial effects of the present disclosure. It should be understood that the above description is merely a specific implementation of the present disclosure and is not intended to limit the protection scope of the present disclosure. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the present disclosure shall be included in the protection scope of the present disclosure.

[0260] Those skilled in the art should understand that the embodiments of the present disclosure can be provided as a method, a system, or a computer program product. Therefore, the embodiments of the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. In addition, the embodiments of the present disclosure can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, Compact Disc Read-Only Memory (CD-ROM), optical storage, etc.) containing computer-usable program code.

[0261] The embodiments of the present disclosure are described with reference to the flowcharts and / or block diagrams according to the methods, devices (systems), and computer program products of the embodiments of the present disclosure. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus produce a device that implements the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0262] These computer program instructions can also be stored in a computer-readable storage medium that can direct the computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer-readable storage medium produce a manufactured product including instruction devices that implement the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0263] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable data processing apparatus to produce a computer-implemented process, so that the instructions executed on the computer or other programmable data processing apparatus provide steps for implementing the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0264] It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed embodiments of the present disclosure without departing from the spirit or scope of the disclosure. Thus, it is intended that the present disclosure cover the modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalents.

Claims

1. A communication processing method applied to a first unit of a first node, the first node further comprising a second unit for controlling and / or managing the first unit, the first node being a node serving a first cell, the method comprising: receiving a first message from a third unit of a second node, the first message being used for requesting a handover from the third unit to the first unit, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell; performing a first operation and a second operation according to the first message, the first operation being used for realizing an air interface handover, the second operation being used for realizing a context establishment and / or a handover link establishment. The performing of the second operation comprises at least one of: sending, by the first unit, a second message to the second unit, the second message being used for requesting an establishment of a terminal context; receiving, by the first unit, a third message from the second unit, the third message being used for responding to the request of the establishment of the terminal context; and receiving, by the first unit, downlink data sent by a core network element through a transmission link after the handover. The first message comprises terminal context information of the second cell.

2. The method of claim 1, wherein, The second message comprises at least one of: a downlink data link handover TNL address allocated by the first unit, resources allocated by the first unit during a user establishment procedure, configuration information of the user establishment procedure, and information of the fourth unit. The third message comprises at least one of: a handover uplink TNL address allocated by the core network, resources allocated by the second unit, and configuration information. The performing of the first operation comprises at least one of: sending, by the first unit, a fourth message to the third unit in response to the first message, the fourth message being used for triggering the third unit to perform a third operation and to stop a transmission of air interface data in the source cell, the third operation being used for realizing a data forwarding; and performing, by the first unit, a fourth operation, the fourth operation being used for triggering a handover random access of the terminal. In the case of the data forwarding, the triggering of the third unit to perform the third operation comprises at least one of: sending, by the third unit, a fifth message to the first unit, the fifth message being used for indicating a transmission status of a data packet; and sending, by the third unit, the data packet to the first unit during the data forwarding, the data packet being in a format of a MAC SDU.

3. The method of claim 1, wherein, 8.A communication processing method applied to a third unit of a second node, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell, the method comprising:

4. The method of claim 2, wherein, ​ 5. The method of claim 2, wherein, ​ 6. The method of claim 1, wherein, ​ ​ ​ 7. The method of claim 6, wherein, ​ ​ ​ ​ sending a first message to a first unit of a first node, the first message being used to request a handover from a third unit of a second node to the first unit, the first node further comprising a second unit for controlling and / or managing the first unit, the first node being a node serving a first cell, the first message being further used to trigger the first unit to perform a first operation and a second operation, the first operation being used to implement an air interface handover, the second operation being used to implement a context establishment and / or a handover link establishment.

9. The method of claim 8, wherein, The first unit performing the second operation comprises at least one of: The first unit sending a second message to the second unit, the second message being used to request an establishment of a terminal context; The first unit receiving a third message from the second unit, the third message being used to respond to the request of the establishment of the terminal context; The first unit receiving downlink data sent by a core network network element through a transmission link after the handover.

10. The method of claim 8, wherein, The first message comprises terminal context information of a second cell.

11. The method of claim 9, wherein, The second message comprises at least one of: a downlink data link handover TNL address allocated by the first unit, resources allocated by the first unit during a user establishment procedure, configuration information of the user establishment procedure by the first unit, information of a fourth unit.

12. The method of claim 9, wherein, The third message comprises at least one of: a handover uplink TNL address allocated by the core network, resources allocated by the second unit, configuration information.

13. The method of claim 8, further comprising: receiving a fourth message from the first unit in response to the first message; performing a third operation and a fourth operation according to the fourth message and stopping transmission of air interface data in a source cell, the third operation being used to implement data forwarding, the fourth operation being used to trigger a handover random access of the terminal.

14. The method of claim 13, wherein, The performing of the third operation comprises at least one of: The third unit sending a fifth message to the first unit, the fifth message being used to indicate a transmission status of a data packet; During the data forwarding, the third unit sending the data packet to the first unit, the data packet being in a format of a MAC SDU.

15. A communication processing method applied to a second unit of a first node, the first node further comprising a first unit, the second unit being used to control and / or manage the first unit, the first node being a node serving a first cell, the method comprising: receiving a second message from the first unit, the second message being used to request an establishment of a terminal context, the second message being sent by the first unit after receiving a first message, the first message being used to request a handover from a third unit of a second node to the first unit, the first message being further used to trigger the first unit to perform a first operation and a second operation, the first operation being used to implement an air interface handover and the second operation being used to implement a context establishment and / or a handover link establishment, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell; and / or, sending a sixth message to a core network network element, the sixth message being used to inform the core network network element to perform a path handover.

16. The method of claim 15, wherein, The second operation comprises at least one of the following: The first unit sends a second message to the second unit, and the second message is used to request establishment of terminal context; The first unit receives a third message from the second unit, and the third message is used to respond to the request for establishment of terminal context; The first unit receives downlink data sent by the core network network element through the switched transmission link.

17. The method of claim 15, wherein, The first message comprises terminal context information of the second cell.

18. The method of claim 16, wherein, The second message comprises at least one of the following: a TNL address of downlink data link switching allocated by the first unit, resources allocated by the first unit during user establishment process, configuration information of the user establishment process of the first unit, and information of the fourth unit.

19. The method of claim 16, wherein, The third message comprises at least one of the following: a switching uplink TNL address allocated by the core network, resources allocated by the second unit, and configuration information.

20. The method of claim 15, wherein, The sixth message comprises TNL address information of downlink switching link switching allocated by the first unit.

21. A communication processing device applied to a first unit of a first node, the first node further comprising a second unit for controlling and / or managing the first unit, the first node being a node serving a first cell, the device comprising: The first transceiver unit and the first processing unit; The first transceiver unit is configured to receive a first message from a third unit of a second node, the first message being used to request switching from the third unit to the first unit, the second node further comprising a fourth unit configured to control and / or manage the third unit, and the second node being a node serving a second cell; The first processing unit is configured to perform a first operation and a second operation according to the first message, the first operation being used to implement air interface switching and the second operation being used to implement context establishment and / or switching link establishment.

22. A communication processing device applied to a third unit of a second node, the second node further comprising a fourth unit for controlling and / or managing the third unit, the second node being a node serving a second cell, the device comprising: The second transceiver unit and the second processing unit; The second transceiver unit is configured to send a first message to a first unit of a first node, the first message being used to request switching from the third unit to the first unit, the first node further comprising a second unit configured to control and / or manage the first unit, and the first node being a node serving a first cell, and the first message being further used to trigger the first unit to perform a first operation and a second operation, the first operation being used to implement air interface switching and the second operation being used to implement context establishment and / or switching link establishment.

23. A communication processing device applied to a second unit of a first node, the first node further comprising a first unit, the second unit being configured to control and / or manage the first unit, the first node being a node serving a first cell, the device comprising: The third transceiver unit and the third processing unit; The third transceiver unit is configured to receive a second message from the first unit, the second message being used to request establishment of terminal context, and the second message being sent after the first unit receives a first message, the first message being used to request switching from a third unit of a second node to the first unit, the first message being further used to trigger the first unit to perform a first operation and a second operation, the first operation being used to implement air interface switching and the second operation being used to implement context establishment and / or switching link establishment, and the second node further comprising a fourth unit configured to control and / or manage the third unit, and the second node being a node serving a second cell; And / or, The sixth message is sent to a core network network element, and the sixth message is used to inform the core network network element to perform path switching.

24. A communications device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method of any one of claims 1 to 20.

25. A readable storage medium having stored thereon a program or instructions, the program or instructions, when executed by a processor, implementing the steps of the method of any one of claims 1 to 20.

26. A computer program product comprising computer instructions, the computer instructions, when executed by a processor, implementing the steps of the method of any one of claims 1 to 20.

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