KR20100105449A - Method and related communication device for radio link control reconfiguration in a wireless communications system - Google Patents

Abstract

PURPOSE: A method for resetting a wireless link in a wireless communication system and a communication device thereof are provided to prevent an immediate value change of an RLC(Radio Link Control)-related parameter which is being used, thereby failure of a UE system due to the immediate value change. CONSTITUTION: When a parameter is used, UE(User Equipment) receives dedicated signaling including a reset value related to the parameter(410). The UE starts to use the reset value in the next time when the parameter is reused(420). When the reset value is received, the UE does not start to use the reset value without conditions. Therefore, a system error is prevented by an immediate change of a used parameter value.

Description

Method and related communication device for radio link control reconfiguration in a wireless communications system

The present invention relates to a method for reconfiguring parameters of a radio link control layer in a wireless communication system and its communication device according to the preamble of claims 1 to 12 of the claims. .

Long-term evolution (LTE) systems, initiated by the third generation partnership project (3GPP), currently provide high data rates, low latency, packet optimization, and improved systems. It is believed to be a new air interface and wireless network architecture that provides performance and coverage. In an LTE system, an evolved universal terrestrial radio access network (E-UTRAN) comprises a plurality of evolved Node-Bs (eNBs) and a plurality of mobile stations-also user equipment equipment, also called UEs.

The air interface protocol of the LTE system includes three layers, a physical layer (L1), a data link layer (L2), and a network layer (L3), where L3 The control plane is a Radio Resource Control (RRC) layer, and L2 is also a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer and media. It is divided into a medium access control (MAC) layer.

The main services and functions of the RLC layer include the transmission of higher layer PDUs; Error correction via ARQ (Acknowledged Mode data transmission only); Concatenation, segmentation, and reassembly of RLC SDUs (non-acknowledgement mode and acknowledgment mode data transmission only); Re-segmentation of RLC data PDUs (acknowledgement mode data transmission only); In sequence delivery of higher layer PDUs (non-acknowledge mode and acknowledgment mode data transmission only); Duplicate detection (non-acknowledgement mode and acknowledgment mode data transmission only); Protocol error detection and recovery; RLC SDU discard (non-acknowledgement mode and acknowledgment mode data transmission only); And RLC re-establishment.

Various RLC layer parameters such as timers and counters are utilized for the above mentioned functions / services and are set or reset by the RRC layer. In the RRC (Re) configuration, the RLC layer parameters are grouped into a "RLC-Config" information element (IE) which can be referenced in the 3GPP TSG-RAN2 Meeting # 65 R2-091971 document.

A logical channel is used for the RLC layer to communicate with the MAC layer. In the arrangement of data priority and amount of data, each logical channel is set with parameters related to transmission priority and prioritized bit rate. Various logical channel parameters are also set or reset by the RRC layer and grouped into a "LogicalChannelConfig" IE, which can be referenced in the 3GPP TSG-RAN2 Meeting # 65 R2-091971 document.

The RLC layer parameters and logical channel parameters mentioned above are considered here as RLC-related parameters. The UE starts to operate using the reset value of the RLC parameter when the RLC parameter is reset by the higher layer. The UE may also receive a "RLC-Config" or "LogicalChannelConfig" IE when RLC-related parameters are in use. In this situation, the UE immediately uses the reset value for the RLC-related parameter in use. However, changing the immediate value of the RLC-related parameter in use may cause failure of the UE system or affect communication system performance.

For example, the RLC counter set to the maximum value M1 is in the counting state of the RLC procedure. During counting of the RLC counter, the UE receives a reset indicating the new maximum value M2 of that RLC counter. If M2> M1 and the UE immediately replaces M1 with M2, then the RLC counter is allowed to count up to M2 for the RLC procedure. The performance of the RLC procedure will be affected. Improper maximum setting may cause RLC errors.

With this in mind, the present invention aims to provide a method for resetting RLC-related parameters in a wireless communication system and associated communication device to solve the above-mentioned problems.

This is achieved by an RLC reconfiguration method for a communication device of a wireless communication system according to claims 1 and 12 of the claims. The dependent claims of the claims relate to corresponding further developments and improvements.

As will be clearer from the following detailed description of the invention, the presently claimed invention for resetting the parameters of the radio link control layer for a wireless communication system is as follows when the RLC-related parameters are in use. Receive dedicated signaling that includes a reset value corresponding to the parameter, and do not immediately begin using the reset value for the RLC-related parameter in use when the reset value is extracted from the dedicated signaling; That does not include.

According to the present invention, by preventing the immediate change of the value of the RLC-related parameter in use, it is possible to prevent the failure of the UE system due to the immediate change of the value and to properly maintain the communication system performance.

1 shows a schematic diagram of a wireless communication system,
2 shows a schematic diagram of a communication device according to an embodiment of the invention,
3 shows a schematic diagram of multiple communication protocol layers,
4-12 show flowcharts of processes in accordance with embodiments of the present invention,
13 shows a schematic diagram of a communication device according to an embodiment of the present invention.

In the following, the invention is further illustrated by way of example with reference to the accompanying drawings.

Reference will now be made to FIG. 1, which illustrates a schematic diagram of a wireless communication system 10 in accordance with an embodiment of the present invention. In simple terms, the wireless communication system 10 consists of a network and a plurality of communication devices. In FIG. 1, the network and communication devices are simply utilized to illustrate the structure of the wireless communication system 10. The wireless communication system 10 may be a Universal Mobile Telecommunications System (UMTS) or Long Term Evolution (LTE) system. In an LTE system, the network is referred to as an evolved-UTRAN (EUTRAN) comprising a plurality of eNBs, while the communication devices are referred to as user equipments (UEs). The UEs can be devices such as mobile telephones, computer systems, and the like. In addition, the network and the UE can be seen as a transmitter or receiver depending on the transmission direction, for example in the uplink (UL) the UE is the transmitter and the network is the receiver, in the downlink (DL) the network is the transmitter and the UE is the receiver to be.

Reference is made to FIG. 2, which illustrates a schematic diagram of a communication device 20 in accordance with an embodiment of the present invention. The communication device 20 may be the communication devices shown in FIG. 1 and includes a processor 200, a computer readable recording medium 210, a communication interface unit 220, and a control unit 230. Computer readable recording medium 210 is any data storage device that includes program code 214, which is then read and processed by processor 200. Examples of computer readable recording medium 210 include a subscriber identity module (SIM), read-only memory (ROM), random-access memory (RAM), CD-ROM, magnetic tape, hard disk, optical data Storage devices, and carrier waves (such as data transmission over the Internet). The control unit 230 controls the communication interface unit 220 and related operations and the states of the communication device 20 according to the processing result of the processor 200. The communication interface unit 220 is preferably a radio transceiver and thus exchanges radio signals with the Internet.

Reference is made to FIG. 3, where FIG. 3 illustrates a schematic diagram of multiple communication protocol layers of an LTE system applied by program code 214 in accordance with an embodiment of the present invention. Program code 214 includes program code of a plurality of communication protocol layers, the layers from top to bottom, radio resource control (RRC) layer 300, packet data convergence protocol (PDCP) layer 310, radio link Control (RLC) layer 320, logical channel management unit 325, media access control (MAC) layer 330, and physical (PHY) layer 340.

The RLC layer 320 can operate as three types of RLC entities: transparent mode (TM) type, unacknowledged mode (UM) type, and acknowledgment mode (AM). ) type. Logical channels are defined between the RLC layer 320 and the MAC layer 330 and managed by the logical channel management unit 325 for packet data transmission, channel prioritization, channel data rate, and the like. The MAC layer 330 may perform buffer status report (BSR) reporting that functions to obtain the amount of RLC data available for uplink transmission. The RRC layer 300 extracts the reset information from the dedicated signaling sent by the network and also submits the extracted reset information to lower layers. In the LTE system, an RRC connection reset message is used as its dedicated signaling to utilize the "RLC-Config" and "LogicalChannelConfig" information elements (IE) used as reset information for the RLC layer 320 and logical channels, respectively. .

When the network attempts to reset the radio link control operation of the communication device 20, the network may send an RRC connection reset message to the communication device 20 including the "RLC-Config" and / or "LogicalChannelConfig" IE. have. RRC layer 300 extracts its IE (s) from the RRC connection reestablishment message and also extracts parameter values such as timer and counter values from the IE (s). The extracted values are then submitted to the RLC layer 320 and / or logical channel management unit 325 for parameter reset. In the LTE system, reset parameters for parameters (eg timer, counter, variable) used in the RLC layer 320 and the logical channel management unit 325 are described above by 3GPP TSG-RAN2 Meeting # 65 R2-091971. Reference may be made to the "RLC-Config" and / or "LogicalChannelConfig" IEs.

In the following embodiments, processes are provided that do not immediately start using reset values for parameters in use when reset values are obtained to prevent system errors. The parameters in the following embodiments are considered as RLC-related parameters as well as those used in the RLC layer or logical channels.

Reference is made to FIG. 4, where FIG. 4 illustrates a flow diagram of a process 40 in accordance with one embodiment of the present invention. Process 40 is utilized for RLC reconfiguration for a UE of a wireless communication system. Process 40 can be compiled into program code 214 and includes the following steps:

Step 400: Start

Step 410: Receive dedicated signaling that includes a reset value associated with the parameter when the parameter is in use

Step 420: Start using the reset value the next time the parameter is reused

Step 430: End.

According to process 40, when dedicated signaling is received during use of a parameter, the reset value begins to be used the next time that parameter is reused. In other words, the UE first waits for the end of the currently used parameter and sets the parameter to its reset value when the parameter is used again.

For example, consider a timer. The UE sets the timer according to the reset value the next time the timer is started or restarted. That is, the UE obtains the reset value before the expiration of the timer and then applies the reset value to the timer when the timer begins to run again after this expiration of the timer. The same concept can be applied to counters. The UE sets the counter according to the reset value the next time the counter is reset to a predetermined initial value (eg, a default value).

As can be seen from process 40, the UE does not unconditionally begin using the reset value immediately when a reset value is received. Therefore, it is possible to prevent a system error by eliminating immediately changing the value of the parameter in use without any consideration.

Reference is made to FIG. 5, which illustrates a flowchart of a process 50 in accordance with one embodiment of the present invention. The process 50 is utilized for RLC resetting for the UE of a wireless communication system and is applied to parameters such as timers or counters which usually have an initial value that is typically set to zero and a target value that can be set or reset by the network. . In addition, the remaining value is the difference between the current value of the parameter being used and the currently expected target value. "In use" of a timer or counter means that the timer is in an operating state or that the counter is in a counting state. The target value of the timer is the expiration time, while the target value of the increment / decrement counter is the maximum / minimum value that the counter can reach. Process 50 may be compiled into program code 214 and includes the following steps:

Step 500: Start

Step 510: Receive dedicated signaling that includes a reset value associated with the parameter when the parameter is in use

Step 520: Determine the use of the parameter in use according to the reset value and at least one of the current value and the remaining value.

Step 530: End.

According to the process 50, the UE determines the use of the parameter in use according to the reset value, the current value and the remaining value after the reset value is received during the use of the parameter. More specifically, the UE obtains the relationship between the reset value and the association values (e.g., only the current value or both the current value and the remaining value) and determines whether to keep or change the usage state of the parameter accordingly. .

Reference will now be made to FIG. 6, where FIG. 6 illustrates a flow diagram of a process 60 in accordance with one embodiment of the present invention. Process 60 is created based on the concept of process 50 for determining the use of an activation timer. Assume that the operation timer has a target time of z and a remaining time of y, and that a reset value of x is received during operation of the timer. In addition, the timer performs time increment counting whereby the current time of the timer is (z-y). Process 60 includes the following steps:

Step 600: Start

Step 605: Acquire x when the timer with the target value z operates at (z-y)

Step 610: Determine whether x is less than y? If yes, perform step 630; otherwise, perform step 620

Step 620: Determine whether x is greater than (z-y)? If yes, do step 640; otherwise, do step 660

Step 630: Restart the timer using the target time of x and then perform step 670

Step 640: Restart the timer with (x- (z-y))

Step 650: Start the timer using the target time of x when the timer is restarted or restarted and then perform step 670

Step 660: Continue to run the timer

Step 670: End.

As can be seen from process 60, the UE immediately uses the reset value x by restarting the timer with value x if x <y. (x <y) means that the new operation period of the timer is smaller than the current remaining time. Thus, the operating time length of the timer is limited to x. In addition, the UE may perform the operations described above with respect to expiration of a timer with target time z. If x> (z-y), the UE restarts the timer with the value [x- (z-y)] which is the difference between the new operation duration and the current value. After the timer restarted with [x- (z-y)] expires, the UE starts using the value x the next time that timer is started or restarted. If x> y and x <(z-y), the UE continues to run the timer without changing the use of the timer.

Therefore, the UE does not immediately unconditionally reset the target value from z to x, thereby causing an error situation that causes a timer with a target time of z to extend its remaining time from y to x when x is greater than y. prevent. Through process 60, the operation timer is properly reset to prevent system errors.

Reference is made to FIG. 7, where FIG. 7 illustrates a flow diagram of a process 70 according to one embodiment of the invention. Process 70 is made based on the concept of process 50 for determining the use of an operation counter. The operation counter has a target number of z 'and a current number of y', and a reset value of x 'is received. In addition, the timer performs increment counting so that the target number of z 'is the maximum value of the counter. Process 70 includes the following steps:

Step 700: Start

Step 705: Acquire x 'when the counter with target value z' counts at y '

Step 710: Determine whether x 'is less than y'? If yes, perform step 720; otherwise, perform step 730

Step 720: Reset the counter to the initial value using the target number of x 'and then perform step 740.

Step 730: Change the target number from z 'to x' and continue operating the counter

Step 740: End.

As can be seen from process 70, the UE resets the counter to an initial value (eg, 0 or a predefined value) and uses x 'as the maximum if x' <y '. In addition, the UE may perform the operations previously described above for the counter to reach a maximum of z '. Otherwise, the UE uses x 'as the maximum and continues to operate the counter. The process 70 can prevent the value applied immediately from becoming larger than the predetermined maximum value.

Reference is made to FIG. 8, where FIG. 8 illustrates a flow diagram of a process 80 in accordance with an embodiment of the present invention. Process 80 is utilized for RLC reconfiguration for a UE of a wireless communication system. Process 80 may be compiled into program code 214 and includes the following steps:

Step 800: Start

Step 810: Receive dedicated signaling that includes a reset value associated with the parameter when the parameter is in use

Step 820: Stop using the parameter if the reset value is a character representing "infinity" or a predetermined value

Step 830: End.

According to process 80, the UE stops the parameter in use when an RRC-only signaling is received that includes a "infinity" reset value. A value of "infinity" can cause serious system errors if applied immediately. For example, the UE stops the operation timer used to count the period of validity of retransmission when the reset value for the operation timer is "infinity" to solve the following problem. If the UE immediately applies the received " infinity " value to the operation counter used to count the validity period of the retransmission, the timer cannot be stopped. This means that the UE can tolerate a very long retransmission failure.

Reference is made to FIG. 9, which illustrates a flow diagram of a process 90 in accordance with one embodiment of the present invention. Process 90 is utilized for resetting associated with the SN-FieldLength parameter of the RLC entity for the UE of the wireless communication system. SN-FieldLength is a parameter for managing the sequence number length in the RLC layer, and substantially determines which sequence the SN of the PDU expected by the correct RLC transmission / retransmission, for example, the UE. Process 90 may be compiled into program code 214 and includes the following steps:

Step 900: Start

Step 910: Receive dedicated signaling that includes a reset value associated with the SN-FieldLength when the SN-FieldLength is in use

Step 920: Re-establish or reset the RLC entity and apply the reset value to the SN-FieldLength and set up the RLC entity

Step 930: End.

According to the process 90, when the UE receives a dedicated signaling for changing the SN-FieldLength value of the RLC entity, such as an RRC connection reset message, the UE resets the RLC entity while applying the reset value to the SN-FieldLength. Re-establish and set up its RLC entities. Therefore, the UE resets or re-establishes its RLC entity when the value of SN-FieldLength appears to be changed by the network, eg when it appears to change in size from 10 bits to 5 bits.

Process 90 is also applicable to resetting any logical channel parameter. When the UE receives dedicated signaling including reset values to change any parameter in the LogicalChannelConfig IE of the RLC entity, the UE resets / re-establishes the RLC entity by applying the reset values to the parameters and Set up the RLC entity.

In process 90, entity reset / reinstall prevents the malfunction of the RLC entity caused by parameter reset.

Reference will now be made to FIG. 10, where FIG. 10 illustrates a flow diagram of a process 1000 in accordance with one embodiment of the present invention. Process 1000 is utilized for RLC reconfiguration for a UE of a wireless communication system. Process 1000 can be compiled into program code 214 and includes the following steps:

Step 1005: Start

Step 1010: Receive dedicated signaling that includes a reset value associated with the logical channel parameter when the logical channel parameter is in use

Step 1020: Determine whether the logical channel prioritization function and the BSR report are active when the reset value is extracted from the dedicated signaling.

Step 1030: If it is determined that neither the logical channel prioritization function nor the BSR reporting is active, start using the reset value immediately.

Step 1040: End.

According to process 1000, the UE determines whether the BSR reporting and logical channel prioritization functions of the MAC layer are active when a reset value is extracted from the dedicated signaling received during use of the logical channel parameters. For example, the reset value can be extracted from the LogicalChannelConfig IE included in the RRC connection reset message. The UE then immediately begins using that value when neither the logical channel prioritization function nor the BSR reporting function is active. The process 1000 prevents the UE from accidentally changing the priority of the logical channel in use or preventing the packet quantity calculation for the BSR.

Reference is made to FIG. 11, where FIG. 11 shows a flow diagram of a process 1100 in accordance with an embodiment of the present invention. Process 1100 is utilized for RLC reconfiguration for a UE of a wireless communication system. Process 1100 may be compiled into program code 214 and includes the following steps:

Step 1105: Start

Step 1110: When a logical channel parameter is in use, receive dedicated signaling that includes a reset value associated with the logical channel parameter.

Step 1120: If neither RLC reset nor RLC re-establishment is required, begin using the reset value at least until the next time the logical channel prioritization function is executed.

Step 1130: End.

According to process 1100, after a reset value associated with a logical channel parameter, e.g., a parameter of LogicalChannelConfig IE of an RLC entity, is received, the UE is at least at least logical channel priority if no RLC reset or RLC re-establishment is required. The reset value begins to be used until the next time the reset function is executed. Using the reset value until the next time the logical channel prioritization function is executed at the latest ensures that the logical channel prioritization function operates to the newest requirements of the network.

The concept of process 1100 is also applicable to the following cases. When the UE receives a dedicated signaling that includes a reset value for the LogicalChannelGroup parameter in the LogicalChannelConfig IE of the RLC entity, the UE next executes BSR reporting if a reset / re-establishment of that RLC entity is not required. Start using that reset value at time. Since the BSR is used to let the network know how much RLC data the UE attempts to transmit during the next transmission, the UE needs to apply new values in a timely manner to generate the correct BSR.

Reference is made to FIG. 12, which illustrates a flow diagram of a process 1200 in accordance with an embodiment of the present invention. Process 1200 is utilized for RLC reconfiguration for a UE of a wireless communication system. Process 1200 may be compiled into program code 214 and includes the following steps:

Step 1205: Start

Step 1210: Receive an RRC Connection Reset message that includes a reset value associated with the parameter when the parameter is in use

Step 1220: Determine whether the RRC connection reset message does not contain any handover-featured IE and is not a message of the RRC connection reset procedure following the RRC re-establishment procedure? If so, perform step 1230; Otherwise, perform step 1250

Step 1230: determine that the RRC connection reset message is invalid and that the RLC reset has failed

Step 1240: Perform the RRC connection reestablishment procedure and perform step 1260

Step 1250: Do not immediately start using the reset value for the parameter in use

Step 1260: End.

According to process 1200, when the UE receives an RRC connection reset message that does not include any handover information and the associated RRC reset procedure does not follow the RRC re-establishment procedure, the UE indicates that the RRC connection reset message is invalid. Determine that the RLC reset has failed. Then, the UE performs an RRC connection reestablishment procedure to recover the RLC reset failure. Otherwise, the RRC reset message is determined to be valid and the reset value does not immediately begin to use that reset value for the parameter in use. Details of step 1250 may be referenced in processes 40-1100.

The RRC connection reset message that does not include any handover information except for the reset value may be an RRC connection reset message that does not include a "mobilityControlInformation" IE but includes a LogicalChannelConfig or RLC-Config IE. "mobilityControlInformation" is used to change a cell, carrier frequency, bandwidth, and the like. If the UE applies only RLC parameters / logical channel parameters without applying the setting of “mobilityControlInformation”, the UE cannot successfully receive the packet after its RRC connection reestablishment procedure. Therefore, the UE regards this RRC connection reset message as invalid.

Reference will now be made to FIG. 13, where FIG. 13 illustrates a schematic diagram of a communication device 1300 in accordance with an embodiment of the present invention. The communication device 1300 may be the communication devices shown in FIG. 1 and includes a receiving unit 1310, a reset unit 1320, a re-establishment and reset unit 1330, and a determination unit 1340. The receiving unit 1310 is used to receive dedicated signaling DSIG including a reset value REV corresponding to the parameter PAR when the parameter PAR is in use. As mentioned above, the parameter PAR corresponds to an RLC layer or logical channels. The re-establishment and reset unit 1330 reinstalls or resets the RLC entity of the RLC layer and generates an indication signal ISC1 for the reset unit 1320 if neither an RLC reset nor an RLC re-install is required. The judging unit 1340 generates the indication signal ISC2 upon determining that neither the logical channel prioritizing function of the logical channels nor the BSR reporting is running. In addition, the judging unit 1340 may determine that the dedicated signaling (DSIG) is an RRC connection reset message that does not include any handover-feature IE and is not a message of the RRC reset procedure following the RRC re-establishment procedure. It is determined that the dedicated signaling DSIG is invalid and that the RLC reset has failed, thereby generating the indication signal ISC3.

The reset unit 1320 is mainly used to not immediately start using the reset value REV for the RLC-related parameter in use when the reset value REV is extracted from the dedicated signaling. According to ISC1, the reset unit 1320, if the parameter is associated with a logical channel (s) (e.g. a parameter of LogicalChannelConfig IE), resets the reset value REV at least until the next time the logical channel prioritization function is executed. You can start using it. Alternatively, the reset unit 1320 may use the reset value PAR at the next time when the buffer status report reporting is executed according to the indication signal ISC1 if the parameter is associated with a logical channel group (eg, a LogicalChannelGroup parameter). To start. According to the indication signal ISC2, the reset unit 1320 immediately starts using the reset value REV when the parameter PAR is associated with the logical channel (s).

In accordance with the indication signal ISC3, the re-establishment and reset unit 1330 may perform an RRC re-establishment procedure for re-installing or resetting the RLC entity, thereby recovering the RLC reset failure.

The communication device 1300 may realize the processes 40-1200, so detailed operation may be referred to in the above-mentioned paragraphs.

Finally, the present preferred methods and means are provided to disclose the concept of not immediately starting to use a reset value for an RLC-related parameter in use, whereby errors in the logical channel management, RLC layer, or wrong BSR reporting can be prevented.

Claims (12)

In the radio link control (RLC) resetting method for a communication device of the wireless communication system 10, the method includes:
Receiving dedicated signaling when the RLC-related parameter is in use, the dedicated signaling including a reconfiguration value corresponding to the RLC-related parameter; And
And not immediately starting to use the reset value for the in-use RLC-related parameter when the reset value is extracted from the dedicated signaling. The method of claim 1,
Not immediately starting to use the reset value for the in-use RLC-related parameter when the reset value is extracted from the dedicated signaling,
Starting to use the reset value the next time the RLC-related parameter is reused, or
Stopping using the RLC-related parameter if the reset value is a character or a predetermined value representing “infinity”, or
Determining the use of the RLC-related parameter in use according to at least one of the reset value and the current value of the RLC-related parameter and the residual value of the RLC-related parameter, wherein the remaining value is the current value and the current value. A difference value between a target value of the RLC-related parameter corresponding to a value. The method of claim 2,
The RLC-related parameter is a timer or a counter,
Starting to use the reset value at the next time the RLC-related parameter is reused may be at the next time the timer is started or restarted, or at the next time the counter is reset to a predetermined initial value. Setting the timer or the counter according to a value. The method of claim 1,
And the dedicated signaling is a radio resource control connection reestablishment message. The method of claim 2,
The RLC-related parameter in use is an operation timer,
Determining the use of the RLC-related parameter in use according to the reset value and at least one of the current value and the remaining value,
Restarting the timer with the reset value when the reset value is less than the remaining value;
Restarting the timer with a first value of (the reset value minus the current value) when the reset value is greater than the current value;
After the timer restarted with the first value expires, starting to use the reset value the next time the timer is started or restarted; And
Continuing to operate the timer when the reset value is greater than the remaining value. The method of claim 2,
The RLC-related parameter in use is an operation counter,
Determining the use of the RLC-related parameter in use according to the reset value and at least one of the current value and the remaining value,
Resetting the counter to an initial value and using the reset value as the target value when the reset value is less than the current value; And
Using the reset value as the target value and continuing to operate the counter when the reset value is greater than or equal to the current value. The method of claim 1,
The RLC-related parameter is a parameter or sequence number length parameter associated with at least one logical channel,
The step of not immediately starting to use the reset value for the in-use RLC-related parameter when the reset value is extracted from the dedicated signaling,
Re-establishing or resetting the RLC entity of the radio link control layer; And
Setting the RLC entity to the reset value. The method of claim 1,
The RLC-related parameter is a parameter associated with at least one logical channel,
The step of not immediately starting to use the reset value for the in-use RLC-related parameter when the reset value is extracted from the dedicated signaling,
When the reset value is extracted from the dedicated signaling, determining whether logical channel prioritization and buffer status report (BSR) reporting of logical channels is active (1020) ); And
Starting to use the reset value immediately if it is determined that neither the logical channel prioritization function nor the BSR reporting is active (1030). The method of claim 1,
The RLC-related parameter is a parameter associated with at least one logical channel,
The step of not immediately starting to use the reset value for the in-use RLC-related parameter when the reset value is extracted from the dedicated signaling,
If neither RLC reset nor RLC re-establishment is required, starting to use the reset value at least until the next time the logical channel prioritization function of the logical channels is executed; . The method of claim 1,
The RLC-related parameter is a parameter associated with a logical channel group,
The step of not immediately starting to use the reset value for the in-use RLC-related parameter when the reset value is extracted from the dedicated signaling,
Starting to use the next timeout reset value at which buffer status reporting reporting is performed if neither an RLC reset nor an RLC re-establishment is required. The method of claim 1,
Radio resource control (RRC) reconfiguration message, wherein the dedicated signaling does not include any handover-featured information element (the RRC reconfiguration message is a message of an RRC reconfiguration procedure following an RRC re-establishment procedure). Not], determining that the dedicated signaling is invalid and the RLC reset has failed; And
And performing the RRC re-establishment procedure to recover the RLC reset failure. In the communication device 20 of the wireless communication system 10 for accurately performing a radio link control (RLC) resetting, the communication device 20,
A computer readable recording medium (210) storing program code (214) corresponding to a process comprising the steps of the method as defined in claim 1; And
A processor (200) coupled to the computer readable recording medium (210) for processing the program code (214) to execute the process.

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