WO2014067273A1

WO2014067273A1 - Method and device for avoiding radio link control (rlc) reset

Info

Publication number: WO2014067273A1
Application number: PCT/CN2013/075053
Authority: WO
Inventors: 汤玉宇; 刘金华
Original assignee: 华为技术有限公司
Priority date: 2012-10-31
Filing date: 2013-05-02
Publication date: 2014-05-08
Also published as: CN102932860B; CN102932860A

Abstract

Disclosed are a method and device for avoiding a radio link control reset, which relate to the field of communications, and are favourable for avoiding the generation of the call drop problem caused by inconsistent sequence numbers under a migration scene by way of avoiding a radio link control reset. The method includes: when user equipment migrates to a drift radio network controller, the drift radio network controller newly establishing a radio bearer with the user equipment, and sending to the user equipment a land mobile access network mobility message, and at the same time setting the discarding frequency for a data protocol data unit in uplink data sent by the user equipment to be 0; the drift radio network controller receiving the uplink data sent by the user equipment, and judging whether the sequence number of the uplink data is 0; and judging whether the discarding frequency for the data protocol data unit exceeds a set maximum discarding frequency and whether the sequence number of the data protocol data unit is 0. The embodiments of the present invention are applied to the field of communications.

Description

Method and device for avoiding radio link control RLC reset This application claims to be submitted to the Chinese Patent Office on October 31, 2002, and the application number is 2 01 21 0427998. 4 , the invention name is "a wireless chain avoidance" The priority of the Chinese Patent Application, which is incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method and apparatus for avoiding radio link control RLC reset. Background technique

In Universal Mobile Telecommunications (Universal Mobile Telecommunications

System, abbreviated as UMTS) In the network, each radio link controller (RNC) is responsible for controlling several cells in the universal mobile communication system network, and controlling the user equipments that are subordinate to these cells (User Equipment, Referred to as UE), and allocating radio link resources to the user equipment, when the user equipment moves from the cell controlled by one radio link controller to the cell controlled by another radio link controller, the serving radio link controller of the user equipment It will change, this process of change is called the migration of user equipment.

In the data transmission of the mutual migration process between the radio link controllers, when the migration to the drift radio link controller occurs, an abnormal migration situation occurs, and the network side sends the mobile information of the land mobile access network, but the user equipment has not received the mobile device. When the message is acknowledged: if the user equipment has some uplink data report, and the reported data is sent before the Radio Link Control (RLC) entity re-establishment, and the serial number information and service carried by the reported data are carried. The radio link controller (Serving RNC, SRNC for short) is consistent and not 0. The uplink data is received by the drift radio link controller (Drift RNC, DRNC for short) on the newly established radio link control entity. Since the sequence number received by the newly established radio link control entity is not 0, the drift radio link controller determines that the sequence number carried by the message is invalid, causing the wireless chain. In the path control reset process, the maximum number of radio link control resets configured on the network side is 1, which causes an unrecoverable error, resulting in the loss of data information that actually needs to be transmitted, resulting in dropped calls. Summary of the invention

The embodiments of the present invention provide a method and a device for avoiding RLC reset, which are beneficial to avoid the occurrence of call drop problems caused by inconsistent sequence numbers in a migration scenario.

To achieve the above objective, the embodiment of the present invention uses the following technical solutions: In a first aspect, a method for preventing a radio link control reset is provided, including: when the user equipment migrates to a drift radio network controller, the drift wireless The network controller creates a radio bearer with the user equipment, and sends a land mobile access network mobility message to the user equipment, and sets a data protocol data unit discarding number in the uplink data sent by the user equipment. Is 0;

The drift radio network controller receives the uplink data sent by the user equipment, and determines whether the uplink data sequence number is 0; and classifies the data packet corresponding to the uplink data whose sequence number is not 0, where The uplink data includes a status protocol data unit and/or a data protocol data unit;

Determining whether the number of discards for the data protocol data unit exceeds a set maximum discard count and a sequence number of the data protocol data unit is 0; if the result of the judgment is no, the data protocol is Retrieving the data protocol data unit sent by the user equipment after the data unit is discarded and incrementing the number of discards, until the data protocol data unit discards the number of times exceeds the maximum number of discards or the data protocol data unit When the sequence number is 0, the data protocol data unit is normally transmitted. In a first possible implementation, the method further includes: receiving the uplink data with the sequence number 0, and sending the uplink data with the sequence number 0 to the network side;

Notifying the user equipment to complete the migration process.

In a second possible implementation, the first aspect specifically includes: the method further includes: Detecting whether the radio bearer newly established by the drift radio network controller corresponding to the state protocol data unit and the user equipment transmits a data protocol data unit; if the result of the detection is no, the The status protocol data unit is discarded, and it is determined whether the sequence number of the uplink data sent by the user equipment received by the drift radio network controller is 0.

In a third possible implementation manner, combining the first aspect specifically includes: if the number of discarded large discards and/or the sequence number of the data protocol data unit is 0, the drift radio network controller normally receives And processing the uplink data sent after the user equipment. In a fourth possible implementation manner, in combination with the second possible implementation manner, the first aspect specifically includes: after the wireless bearer newly established by the device and the user equipment sends the data protocol data unit, the method further includes:

If the detection result is yes, the status protocol data unit is normally received, and the sequence number of the uplink data sent by the user equipment received by the drift radio network controller is determined to be 0.

The second aspect provides a device for preventing a radio link control reset, including: a link setting unit, configured to: when the user equipment migrates to the drift radio network controller, the drift radio network controller newly creates the user equipment And transmitting a land mobile access network mobility message to the user equipment, and setting a data protocol data unit discarding number in the uplink data sent by the user equipment to 0; a serial number discriminating unit, Receiving, by the drift radio network controller, the uplink data sent by the user equipment, and determining whether the uplink data sequence number is 0;

a protocol data unit classification unit, configured to: use the uplink data pair or the data protocol data unit whose sequence number is not 0;

Whether the set maximum number of discards and the serial number of the data protocol data unit are exceeded Is o;

a data processing unit, configured to: if the judgment result of the condition discriminating unit is negative, the data protocol data unit sent by the user equipment until the number of times the data protocol data unit is discarded exceeds a maximum number of discards or the data When the sequence number of the protocol data unit is 0, the data protocol data unit is normally transmitted.

In a first possible implementation, the method further includes: the device further includes: the data processing unit, further configured to receive the uplink data with the sequence number 0, and set the serial number to The uplink data of 0 is sent to the network side;

The notification sending unit is configured to notify the user equipment to complete the migration process.

In a second possible implementation, the second aspect specifically includes: the device further includes:

Whether the radio bearer newly established by the drift radio network controller and the user equipment transmits a data protocol data unit;

a status data processing unit, configured to: if the result of the detecting by the condition determining unit is negative, discard the status protocol data unit, and re-determine that the user equipment received by the drift radio network controller sends Whether the serial number of the uplink data is 0.

In a third possible implementation, the second aspect specifically includes: the data processing unit, further configured to: if the determination result of the condition determining unit is yes, the serial number of the data protocol data unit If it is 0, the drift radio network controller normally receives and processes the uplink data sent after the user equipment.

In a fourth possible implementation manner, in combination with the second possible implementation manner, the second aspect specifically includes: the state data processing unit, further configured to: if the condition of the detection by the condition determining unit If yes, the status protocol data unit is normally received, and the sequence of the uplink data sent by the user equipment received by the drift radio network controller is re-determined. Whether the column number is 0.

The method and device for avoiding reset provided by the present invention are effective for judging the state of the state protocol data unit by the drift radio network controller and determining whether the data protocol data unit sequence number is 0 or the number of discards exceeds the maximum number of discards. Avoid the problem that the user equipment is dropped due to the radio link control reset due to the inconsistent sequence number in the migration scenario. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

FIG. 1 is a flowchart of a method for avoiding radio link control RLC reset according to an embodiment of the present invention;

2 is a flowchart of another method for avoiding radio link control RLC reset according to an embodiment of the present invention;

FIG. 3 is a flowchart of still another method for avoiding radio link control RLC reset according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus for avoiding radio link control reset according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another apparatus for avoiding radio link control reset according to an embodiment of the present invention;

6 is a schematic structural diagram of another apparatus for avoiding radio link control reset according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a device for avoiding wireless link control reset according to another embodiment of the present invention.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention. Rather than all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The current User Equipment (UE) migration process refers to the control of the Radio Network Controller (RNC) in the Universal Mobile Telecommunications System (UMTS) network. Controlling a number of cells under the area, and controlling the user equipment UE camping under the cell, and allocating radio link resources to the UE. The radio network controller is called a Serving RNC (SRNC for short). . When the UE moves from one RNC controlled cell to another RNC controlled cell, the "SRNC" that provides the radio link resource for the UE changes. This change process is called UE migration, and is in the migration process. The RNC that the UE provides for radio link resources is called the Drift RNC (DRNC). The present invention is to avoid the situation that the user equipment dropped the call due to the radio link control reset in the prior art. In the prior art, the sequence number of the data protocol data unit in the uplink data uploaded by the user equipment is not 0 or The number of times the user equipment retransmits the data protocol data unit exceeds the configured maximum number of retransmissions, resulting in the control of the radio link control in the drift wireless network. The maximum number of resets in the reset process is 1. When the maximum number of resets is exceeded, In order to solve the problem, the present invention provides a method for avoiding radio link control reset. Referring to FIG. 1 , the following processes are specifically included:

101. When the user equipment migrates to the drift radio network controller, the drift radio network controller creates a radio bearer between the user equipment and the user equipment, and sends a land mobile access network mobility message to the user equipment, and sets an uplink sent to the user equipment. The number of data protocol data unit drops in the data is zero.

Here, the user equipment UE is to enter the DRNC-controlled area, first establishes a new radio bearer (RB) with the DRNC, and the DRNC sends a land mobile access network mobility message (Untra Mobility Info, UMI for short) to the user equipment UE. ), and set the number of data protocol data unit discards in the uplink data sent to the user equipment to be 0. The number of discarded data protocol data units (PDUs) in the data uploaded by the user equipment is set to a maximum number of discards for the number of discarded data PDUs. The maximum number of discards is less than the DRNC configuration. The maximum number of retransmissions (Max DAT) is greater than the maximum number of data PDUs that the UE may send on the newly created bearer RB during the period from the time when the DRNC sends the UMI to the time when the UE receives the UMI. When the number of discards is less than the maximum number of retransmissions, all data PDUs corresponding to the SRNC before the migration can be discarded, ensuring that the sequence number starts at 0 when the next retransmission data PDU arrives.

102. The drift radio network controller receives the uplink data sent by the user equipment, and determines whether the uplink data sequence number is 0.

103. Classify, according to the uplink data corresponding to the uplink data whose sequence number is not 0, where the uplink data includes a status protocol data unit and/or a data protocol data unit.

The number of drops and the sequence number of the data protocol data unit are 0.

105. If the judgment result is no, the data protocol data unit is discarded and the number of discarded times is increased by 1, and then the data protocol data unit sent by the user equipment is re-received until the data protocol data unit discards the number of times exceeds the maximum number of discards or When the serial number of the data protocol data unit is 0, the data protocol data unit is normally transmitted. If the sequence number of the current data PDU is not 0, and the number of discards does not exceed the maximum number of discards, indicating that the data is the data PDU of the corresponding SRNC sent by the user equipment UE before starting the migration, or the sequence number sent by the DRNC corresponding to the UE side. A non-zero data PDU, at which time the data PDU is discarded and the number of statistical discards is incremented by one, and the DRNC issues a notification to the UE to re-upload the data until the sequence number of the data PDU in the uploaded data is 0; wherein the UE sends to the DRNC A data PDU whose sequence number is not 0 may be discarded due to a transmission error of the physical layer during transmission. As a result, the sequence number of the data PDU received by the DRNC side is not 0.

Optionally, it also includes:

106. If the result of the determination is yes, if the number of discarded data protocol data units exceeds the set maximum number of discards and/or the sequence number of the data protocol data unit is 0, the drift radio network controller normally receives and processes Uplink data sent after the user equipment. Here, if the sequence number of the current data PDU received by the DRNC is 0, it indicates that the data PDU is the expected data on the corresponding newly created RB; if the current number of discards has exceeded the maximum number of discards, it indicates the data corresponding to the SRNC before the migration. The PDUs have all been discarded, and the new data PDU sequence number starts at 0 when the next retransmission data PDU arrives. Of course, if the uplink data uploaded by the user equipment in step 106 is correct data, the user equipment sends a Land Mobile Access Network Mobility Confirmation message (UMI Conf) to the Drift Radio Network Controller (DRNC) through the acknowledge mode. , then the DRNC notifies the user that the device migration is complete.

Here, in the process in which the UE mentioned in the present invention completes the migration in the control region across the RNC, the usual technical means is soft handover, and the soft handover refers to channel switching between the cells when the carrier frequencies of the pilot channels are the same. During the handover process, the mobile subscriber maintains a communication link with both the original base station and the new base station, and only when the mobile station establishes stable communication in the new cell, disconnects from the original base station. The soft handover in the case of a transition can be regarded as a cross-RNC handover, which will result in a static migration of the UE. In this static migration scenario, the probability of dropped calls is higher because the sequence numbers are inconsistent. With the technical solution of the present invention, the call drop problem caused by the inconsistent serial number in the soft-cut static migration scenario can be avoided. The method for avoiding radio link control reset provided by the present invention determines the state of the state protocol data unit by the drift radio network controller and whether the data protocol data unit sequence number is 0 or the number of discards exceeds the maximum discard count. This effectively avoids the problem that the user equipment is dropped due to the occurrence of the radio link control reset due to the inconsistent sequence number in the migration scenario.

Optionally, referring to FIG. 2, after the step 102, the method for avoiding the wireless link control reset provided by the present invention further includes:

107. Receive uplink data with sequence number 0, and send uplink data with sequence number 0 to the network side.

108. Notify the user equipment to complete the migration process. Here, the uplink data of the sequence number 0 received by the DRNC is legal data, and the uplink data and the data uploaded by the UE are normally received and processed. Optionally, referring to FIG. 3, after step 103, the present invention provides another avoidance. The method for free wireless link control reset includes:

109. Detect whether the radio bearer corresponding to the drift radio network controller corresponding to the status protocol data unit sends a data protocol data unit with the radio bearer between the user equipment;

110. If the result of the detection is no, discard the status protocol data unit, and re-determine whether the sequence number of the uplink data sent by the user equipment received by the drift radio network controller is 0.

Because the status PDU does not send data PDUs after the newly created RB is created, if the status PDU received by the DRNC is definitely not the status PDU that the DRNC needs to receive, and the status PDU received by the DRNC is unreasonable, then The status PDU discards and re-determines whether the sequence number of the uplink data sent by the user equipment received by the drift radio network controller is 0.

111. If the detection result is yes, the status protocol data unit is normally received, and the sequence number of the uplink data sent by the user equipment received by the drift radio network controller is re-determined to be 0.

Because the status PDU has sent data PDUs after the newly created RB is created,

The status PDU received by the DRNC is a reasonable behavior. The status PDU will be received and processed normally, and the sequence number of the uplink data sent by the user equipment received by the drift radio network controller is 0. The method for avoiding radio link control reset provided by the present invention determines the state of the state protocol data unit by the drift radio network controller, thereby effectively avoiding the wireless between the newly built user equipment and the drifting radio network controller corresponding to the state protocol data unit. The case where the number of bearers exceeds the maximum number of retransmissions and triggers the radio link control reset causes the user equipment to drop the call.

The present invention provides an apparatus 2 for avoiding radio link control reset. Referring to FIG. 4, the present invention includes: a link setting unit 21, a serial number discriminating unit 22, a protocol data unit classifying unit 23, a condition discriminating unit 24, and a data processing unit. 25, wherein: a link setting unit 21 is configured to: when the user equipment migrates to the drift radio network controller, the drift radio network controller creates a radio bearer between the user equipment and the user equipment, and sends the mobility of the land mobile access network to the user equipment. Message, set the uplink sent to the user equipment at the same time The number of data protocol data unit discards in the data is 0; the sequence number discriminating unit 22 is configured to: the drift radio network controller receives the uplink data sent by the user equipment, and determines whether the uplink data sequence number is 0;

a protocol data unit classification unit 23, configured to classify data packets corresponding to uplink data whose sequence number is not 0, where the uplink data includes a status protocol data unit and/or a data protocol data unit;

Whether the set maximum number of discards and the sequence number of the data protocol data unit are 0; the data processing unit 25 is configured to discard the data protocol data unit and discard if the condition of the condition discriminating unit 24 is negative If the number of discarded data is increased by 1, the data protocol data unit sent by the user equipment is re-received until the data protocol data unit discards the number of times exceeds the maximum number of discards or the sequence number of the data protocol data unit is 0, and the data protocol data unit is normally sent.

Further, optionally, the data processing unit 25 is further configured to: if the determination result of the condition determining unit 24 is YES, satisfy the data protocol data unit that the number of discarded times exceeds the set maximum number of discards and/or whether the sequence number thereof is If it is 0, the drift radio network controller normally receives and processes the uplink data sent after the user equipment. The device for avoiding radio link control reset provided by the present invention determines the state of the state protocol data unit by the drift radio network controller and whether the data protocol data unit serial number is 0 or the number of discarded times exceeds the maximum number of discards. This effectively avoids the problem that the user equipment is dropped due to the occurrence of the radio link control reset due to the inconsistent sequence number in the migration scenario.

Optionally, the data processing unit 25 is further configured to receive the uplink data with the sequence number 0, and send the uplink data with the sequence number 0 to the network side.

Further, the device 2 for avoiding the reset of the radio link control, as shown in FIG. 5, further includes: a notification sending unit 26, wherein: the notification sending unit 26 is configured to notify the user equipment to complete the migration process.

Optionally, the condition discriminating unit 24 is further configured to: detect whether the radio bearer newly established by the drift radio network controller corresponding to the state protocol data unit and the user equipment sends the data protocol data unit; The communication interface 33 is mainly used to implement communication between the device provided by the embodiment and other devices or devices.

The processor 31 runs a program corresponding to the executable program code by reading executable program code stored in the memory 32 for:

The processor 31 is configured to: when the user equipment migrates to the drift radio network controller, the drift radio network controller creates a radio bearer between the user equipment and the user equipment, and sends the land mobile access network mobility message to the user equipment through the communication interface 33, where At the same time, the number of data protocol data unit discards in the uplink data sent by the user equipment is set to 0;

The processor 31 is further configured to receive, by the communication interface 33, the uplink data sent by the user equipment, and determine whether the uplink data sequence number is 0. The processor 31 is further configured to use the uplink data whose sequence number is not 0. Corresponding data packets are classified, wherein the uplink data includes a status protocol data unit and/or a data protocol data unit; the set maximum number of discards and the sequence number of the data protocol data unit are 0; the processor 31 is also used for If not, the data protocol data unit is discarded through the communication interface 33 and the number of discarded times is increased by 1, and the data protocol data unit sent by the user equipment is re-received through the communication interface 33 until the data protocol data unit is discarded more than the maximum number of discarded data units. When the number of discarded or the serial number of the data protocol data unit is 0, the data protocol data unit is normally transmitted through the communication interface 33. The device for avoiding radio link control reset provided by the present invention determines the state of the state protocol data unit by the drift radio network controller and whether the data protocol data unit serial number is 0 or the number of discarded times exceeds the maximum number of discards. This effectively avoids the problem that the user equipment is dropped due to the occurrence of the radio link control reset due to the inconsistent sequence number in the migration scenario.

Further, the processor 31 is further configured to: receive the uplink data with the sequence number 0 through the communication interface 33, and send the uplink data with the sequence number 0 to the network side through the communication interface 33; the processor 31 is further used for The user equipment is notified through the communication interface 33 to complete the migration process. Further, optionally, the processor 31 is further configured to: if yes, if the data protocol data sheet Optionally, the present invention provides another device for preventing wireless link control reset. Referring to FIG. 6, the method further includes: a state data processing unit 27, wherein: the state data processing unit 27 is configured to: if the condition determining unit 24 If the result of the detection is no, the state protocol data unit is discarded, and it is determined whether the sequence number of the uplink data sent by the user equipment received by the drift radio network controller is 0.

Further, the state data processing unit 27 is further configured to: if the result of the detection by the condition determining unit 24 is YES, receive the state protocol data unit normally, and re-determine the sequence of the uplink data sent by the user equipment received by the drift radio network controller. Whether the number is 0. The device for avoiding radio link control reset provided by the present invention can determine the state of the state protocol data unit by the drift radio network controller, thereby effectively avoiding the wireless between the newly created mobile device and the user equipment corresponding to the state protocol data unit. The case where the number of bearers exceeds the maximum number of retransmissions and triggers the radio link control reset causes the user equipment to drop the call.

FIG. 7 is a schematic structural diagram of an apparatus for avoiding radio link control reset according to another embodiment of the present invention. The device for avoiding radio link control reset provided in this embodiment may be integrated into an existing network device, or may be an independent device dedicated to avoid radio link control reset. As shown in FIG. 7, the apparatus of this embodiment includes: at least one processor 31, a memory 32, a communication interface 33, and a bus. The processor 31, the memory 32, and the communication interface 33 are connected by a bus and complete communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA). Bus, etc. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 7, but it does not mean that there is only one bus or one type of bus. Wherein: the memory 32 is for storing executable program code, the program code comprising computer operating instructions. The memory 32 may include a high speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory. The processor 31 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit. If the number of times the number of discards exceeds the set maximum number of discards or whether the serial number thereof is 0, the drift radio network controller normally receives and processes the uplink data sent by the user equipment through the communication interface 33.

Optionally, the processor 31 is further configured to: determine, by the drift wireless network controller corresponding to the state protocol data unit, whether the radio bearer newly established between the user equipment and the user equipment has sent the data protocol data unit;

The processor 31 is further configured to discard the status protocol data unit through the communication interface 33 and re-determine whether the serial number of the uplink data sent by the user equipment received by the drift radio network controller is 0. Further, the processor 31 is further configured to determine whether the radio bearer corresponding to the state protocol data unit and the radio bearer newly established by the radio network controller and the user equipment has sent the data protocol data unit;

The processor 31 is further configured to: if yes, receive the status protocol data unit normally through the communication interface 33, and re-determine whether the serial number of the uplink data sent by the user equipment received by the drift radio network controller is 0. The device for avoiding radio link control reset provided by the present invention can determine the state of the state protocol data unit by the drift radio network controller, thereby effectively avoiding the wireless between the newly created mobile device and the user equipment corresponding to the state protocol data unit. The case where the number of bearers exceeds the maximum number of retransmissions and triggers the radio link control reset causes the user equipment to drop the call.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk. The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Claim

A method for avoiding radio link control reset, comprising: when the user equipment migrates to the drift radio network controller, the drift radio network controller creates a radio bearer with the user equipment, and Sending a land mobile access network mobility message to the user equipment, and setting a data protocol data unit discarding number in the uplink data sent by the user equipment to 0; the drift radio network controller receiving the user equipment Transmitting the uplink data, and determining whether the uplink data sequence number is 0; classifying the data packet corresponding to the uplink data whose sequence number is not 0, where the uplink data includes a status protocol data unit and/or Data protocol data unit;

Determining whether the number of discards for the data protocol data unit exceeds a set maximum discard count and a sequence number of the data protocol data unit is 0; if the result of the judgment is no, the data protocol is Retrieving the data protocol data unit sent by the user equipment after the data unit is discarded and incrementing the number of discards, until the data protocol data unit discards the number of times exceeds the maximum number of discards or the data protocol data unit When the sequence number is 0, the data protocol data unit is normally transmitted.

The method according to claim 1, wherein the method further comprises: receiving the uplink data with the sequence number 0, and sending the uplink data with the sequence number 0 to the network side;

Notifying the user equipment to complete the migration process.

The method according to claim 1, wherein the method further comprises: detecting a radio bearer newly established by the drift radio network controller corresponding to the state protocol data unit and the user equipment Whether the data protocol data unit is sent; if the result of the detection is no, the state protocol data unit is discarded, and the uplink data sent by the user equipment received by the drift radio network controller is re-determined. Whether the serial number is 0.

The method according to claim 1, wherein if the result of the determining is yes, the number of discarded data unit data units exceeds a set maximum number of discards and/or the data The sequence number of the protocol data unit is 0, and the drift radio network controller normally receives and processes the user equipment and then sends The upstream data.

The method according to claim 3, wherein the detecting whether the radio bearer newly established by the drift radio network controller corresponding to the state protocol data unit and the user equipment transmits data protocol data After the unit, the method further includes: if the detection result is yes, receiving the status protocol data unit normally, and re-determining whether the serial number of the uplink data sent by the user equipment received by the drift radio network controller is Is 0.

A device for avoiding radio link control reset, comprising: a link setting unit, configured to: when the user equipment migrates to the drift radio network controller, the drift radio network controller is newly created with the user a radio bearer between the devices, and sending a land mobile access network mobility message to the user equipment, and setting a data protocol data unit discarding number in the uplink data sent by the user equipment to 0; a serial number discriminating unit, The drift radio network controller receives the uplink data sent by the user equipment, and determines whether the uplink data sequence number is 0;

Whether the set maximum number of discards and the sequence number of the data protocol data unit are 0; the data processing unit is configured to: if the judgment result of the condition discriminating unit is negative, the data sent by the user equipment The protocol data unit sends the data protocol data unit normally until the number of times the data protocol data unit is dropped exceeds the maximum number of drops or the sequence number of the data protocol data unit is zero.

The device according to claim 6, wherein the device further comprises: the data processing unit, further configured to receive the uplink data with the sequence number 0, and set the sequence number to 0. The uplink data is sent to the network side;

The device according to claim 6, wherein the device further comprises:

Whether the radio bearer newly established by the drift radio network controller and the user equipment transmits the data protocol data unit; the state data processing unit is configured to: if the result of the detecting by the condition discriminating unit is no, The state protocol data unit is discarded, and it is determined whether the sequence number of the uplink data sent by the user equipment received by the drift radio network controller is 0.

The device according to claim 6, wherein the data processing unit is further configured to: if the number of the judgment result of the condition discriminating unit and/or the sequence number of the data protocol data unit is 0 And the drift radio network controller normally receives and processes the uplink data sent after the user equipment.

The device according to claim 8, wherein the state data processing unit is further configured to: if the result of the detecting by the condition determining unit is yes, receive the state protocol data unit normally And re-determining whether the sequence number of the uplink data sent by the user equipment received by the drift radio network controller is 0.