KR20160109111A - Device and method for resuming data transmission in a mobile communication system - Google Patents

Abstract

The present invention relates to an apparatus and method for resuming data transmission and reception in a mobile communication system. The method for resuming data transmission and reception in a mobile communication system according to the present invention comprises the steps of: when an uplink data arrival event occurs in a state in which an uplink of a serving cell is in an asynchronous state, transmitting, by a terminal, a preamble to a base station, and receiving, by the terminal, random access response information corresponding to the preamble; transmitting uplink data to the base station based on information about scheduling of uplink resources acquired from the random access response information; receiving a physical downlink control channel including uplink control information from the base station; and receiving a Medium Access Control (MAC) layer control element from the base station as a command signal commanding resetting of resources, and resetting the resources.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device and a method for resuming data transmission and reception in a mobile communication system,

The present invention relates to a method and apparatus for resuming data transmission / reception in a mobile communication system.

In a wireless communication system, a user equipment (UE) and a base station (eNode B) transmit and receive data. One or more cells exist in one base station, and each cell is set to each bandwidth to provide a downlink or uplink transmission service to a plurality of terminals.

Such a base station controls data transmission / reception for a plurality of terminals. The base station transmits downlink scheduling information for downlink (DL) data, and informs the corresponding terminal of a time / frequency region, a coding size, a data size, and information related to HARQ (Hybrid Automatic Repeat and ReQuest). Also, the base station transmits uplink scheduling information to uplink (UL) data to the corresponding mobile station, and notifies the time / frequency region, coding, data size, and HARQ related information that the mobile station can use.

The UE completes a random access procedure and maintains an uplink synchronized state with the base station. However, when the UE has released a Physical Uplink Control Channel (PUCCH), a Sounding Reference Signal (SRS) resource for a serving cell, a PUCCH, an SRS resource The procedure of setting up

When a downlink data arrival event occurs in a serving cell when the uplink synchronous state is in a non-synchronized state with a terminal, the serving cell transmits a physical downlink control channel (PDCCH) And instructs the terminal to perform random access with an order. The UE completes a random access procedure and maintains an uplink synchronized state with the base station. However, in a state where the PUCCH and SRS resources are released from the serving cell, the PUCCH and SRS resource reset procedures are required.

In the carrier aggregation technique, the UE releases the SRS resource when the TAT (Time Alignment Timer) expires for the serving cell belonging to the sTAG (Secondary Timing Advance Group). Upon completion of a random access procedure for setting a time alignment of the sTAG, which is initiated by a physical downlink control channel indication at the base station, the UE transmits an uplink synchronized state Lt; / RTI > However, when the SRS resources of the serving cells are released, a procedure for resetting the SRS resources is required.

According to the related art, in order to reset the PUCCH or SRS resource, the base station uses a radio resource control (RRC) connection reset message including PUCCH and SRS configuration information from the base station.

In a terminal that is dual-connected to a master cell group (MCG) and a secondary cell group (SCG), uplink data arrives in the non-synchronized state with the main serving cell (PSCell) A random access procedure by UL data arrival or DL data arrival event is performed. Thereafter, a process for resetting the PUCCH and SRS resources is required when the PUCCH and SRS resources for the serving cell of the auxiliary cell group of the UE are released.

In the dual connection scheme, a radio resource control message is transmitted only to the UE through the master cell group. Therefore, in order to set up the PUCCH and SRS resources of the serving cell of the auxiliary cell group of the terminal, the base station requests a radio resource control connection reset of the terminal from the auxiliary cell group to the master cell group and transmits a radio resource control connection reset message to the terminal through the master cell group Should be. Therefore, a time delay and a signaling overhead occur between the master cell group and the auxiliary cell group.

Korean Patent Publication No. 2014-0130430

In the process of random access between a UE and a serving cell in resuming data transmission / reception in a state where an uplink physical uplink control channel (PUCCH) or a sounding reference signal (SRS) resource is released, It is possible to reset the PUCCH and / or SRS resources of the corresponding serving cell using the PUCCH and / or SRS configuration information stored immediately before the release of the PUCCH and / or the SRS resource at the completion of the random access procedure.

The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

The apparatus for resuming data transmission and reception in a mobile communication system according to an exemplary embodiment of the present invention includes a physical uplink control channel and a physical uplink control channel when receiving a radio resource setup message or a reset message for serving cells of a serving cell and a serving cell of a sub- A memory for storing sounding reference signal setting information; A radio frequency unit for communicating with a base station including serving cells of a sub cell group and serving cells of a master cell group; And a processor for resetting resources of the corresponding serving cell using configuration information stored in the memory when a MAC (Medium Access Control) layer control element is received from the base station with a command signal for instructing a resource re-establishment.

A method for resuming data transmission and reception in a mobile communication system according to another exemplary embodiment of the present invention is a method for resuming data transmission and reception in a mobile communication system when a UL data arrival event occurs in an asynchronous state in an uplink of a serving cell, Receiving information; Transmitting uplink data to a base station through scheduling information of uplink resources obtained from random access response information; Receiving a physical downlink control channel including uplink control information from a base station; And receiving a MAC (Medium Access Control) layer control element as a command signal for instructing a resource reset from the base station and resetting resources.

In another aspect of the present invention, there is provided a method for resuming data transmission / reception in a mobile communication system, the method comprising: transmitting a random access signal from a base station to a mobile station when a downlink data arrival event occurs in an asynchronous state of a downlink of a serving cell; Transmitting a preamble from a terminal to a base station and receiving random access response information corresponding to the preamble; Transmitting uplink data to a base station through scheduling information of uplink resources obtained from random access response information; Receiving a physical downlink control channel from a base station; And receiving a MAC (Medium Access Control) layer control element as a command signal for instructing a resource reset from the base station and resetting resources.

A method for resuming data transmission and reception in a mobile communication system according to another embodiment of the present invention is a method for resending data in a mobile communication system in which a random access signal is transmitted from a base station to a terminal when a time alignment event of a serving cell corresponding to a sTAG (Secondary Timing Advance Group) step; Transmitting a preamble from a terminal to a base station and receiving random access response information corresponding to the preamble; And resetting resources by receiving a MAC layer control element with a command signal for instructing resource reset from the base station.

The present invention provides an effect of solving the problem of unnecessary delay and signaling overhead occurring in resuming transmission and reception of data in a terminal having a carrier aggregation and / or dual connectivity.

It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. .

1 is a diagram for explaining a method for resuming data transmission / reception in a mobile communication system according to an embodiment of the present invention;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for resuming data transmission / reception in a mobile communication system.
FIG. 3 and FIG. 4 are diagrams for explaining a method for resuming data transmission / reception in a mobile communication system according to still another embodiment of the present invention. FIG.
5 is a view for explaining a MAC layer control element;
6 is a view for explaining a MAC PDU sub-header;
FIG. 7 is a block diagram for explaining an apparatus for resuming data transmission / reception in a mobile communication system according to an embodiment of the present invention; FIG.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings.

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

In an embodiment of the present invention, a user equipment (UE) 100 transmits a physical uplink control channel (SCCH) of serving cells of a serving cell or a secondary cell group of a master cell group (MCG) (RRC) setup message or a reset message including a control channel (hereinafter referred to as a PUCCH) and a sounding reference signal (SRS) setup information, And stores the PUCCH and SRS setting information separately.

The UE 100 maintains the PUCCH and SRS configuration information of the corresponding serving cell and changes the PUCCH and SRS resources of the corresponding serving cell to the released state in the PUCCH and SRS resource release procedures.

In the case where the UE 100 holds preset PUCCH and SRS setting information of the serving cell and changes the PUCCH and SRS resources of the serving cell to the released state, the following case is included.

When the TAT (Time Alignment Timer) of the primary timing advancing group (pTAG) of the master cell group expires, the UE 100 maintains predetermined PUCCH and SRS setting information of all the serving cells of the master cell group set in the UE 100 , PUCCH, and SRS resources to the released state.

Then, when the TAT of the pTAG of the auxiliary cell group expires, the AT 100 maintains predetermined PUCCH and SRS setting information of all serving cells of the auxiliary cell group set in the AT 100, releases the PUCCH and SRS resources to the released state Change it.

In addition, when the TAT of the sTAG (Secondary Timing Advance Group) of the master cell group MCG expires, the UE 100 keeps the preset SRS setting information of all the serving cells belonging to the sTAG of the master cell group, Change it.

Then, when the TAT of the sTAG of the master cell group expires, the UE 100 holds the preset SRS setting information of all the serving cells belonging to the sTAG of the sub-cell group and changes the SRS resource to the released state.

When the SR count (COUNT) reaches the reference value dsr-TransMax in the Scheduling Request (hereinafter referred to as SR) procedure through the main serving cell (PCell) of the master cell, The PUCCH and SRS setting information of all the serving cells of the master cell group set in the PUCCH and SRS resources is set to the released state. Here, the reference value dsr-TransMax is the maximum number of transmissions of the SR allowed in the UE 100 and may be provided from the eNode B (eNode B) 200.

When the SR count (COUNT) reaches the reference value (dsr-TransMax) in the SR procedure through the main serving cell (PSCell) of the auxiliary cell group, the terminal 100 sets all of the auxiliary cell groups Retains the PUCCH and SRS setting information of the serving cell, and changes the PUCCH and SRS resources to the released state.

Here, the PUCCH setting information includes CQI information (Channel Quality Indicator-ReportConfig), CQI SCell information (QCI-ReportConfigSCell), and SR information (schedulingRequestConfig). The SRS setting information includes uplink SRS setting information (sounding RS-UL-ConfigDedicated).

Then, the UE 100 deletes the stored PUCCH and SRS setting information of the corresponding serving cell at the time of release of the serving cell of the serving cell or the serving cell of the auxiliary cell group of the master cell group.

1 is a diagram for explaining a method for resuming data transmission / reception in a mobile communication system according to an embodiment of the present invention.

When the uplink synchronous state of the wirelessly connected serving cell is in a non-synchronized state or when an uplink data arrival (UL data arrival) event occurs in a state where the PUCCH resource for SR is released, And performs a random access procedure from the serving cell to the serving cell (step S1)

That is, the serving cell of the base station 200 receives a preamble from the UE 100 (step S2). Then, the serving cell generates a random access response (RAR) based on the received preamble (Step S3). Then, the terminal 100 transmits an RRC connection setup request message Msg3 to the base station 200 (step S4). Here, the RRC connection setup request message The RRC layer that controls the logical channel Msg3 is responsible for controlling logical channels, transport channels, and physical channels in connection with configuration, re-configuration, and release of resources.

That is, the UE 100 transmits a C-RNTI (Medium Access Control) C-RNTI (Medium Access Control) through a UL Grant (uplink resource scheduling information) resource obtained from the random access response information. Media Access Control) Transmits a layer control element (CE) and a buffer status report (BSR) to the serving cell.

Thereafter, the serving cell allocates a Physical Uplink Shared Channel (PUSCH) resource based on the BSR information transmitted by the UE 100. [ The serving cell identifies the UE 100 to a C-RNTI MAC layer control element (CE) received in the random access procedure, and transmits a physical downlink control channel (PDCCH) (Step S5). Then, the base station 200 transmits a command signal (RadioConnectionReconfiguration Command) for instructing a wireless connection reset of the serving cell to the terminal 100 as a MAC layer control element. (Step S6 )

The random access procedure by the uplink data arrival event includes a random access procedure triggered by the uplink data arrival in the main serving cell (PCell) of the master cell group or the main serving cell (PSCell) of the subcell group in the dual connectivity do.

When a random access procedure based on the uplink data arrival event is performed in the main serving cell (PCell) of the master cell group of the AT 100, the BS 200 transmits the PUCCH of the serving cell set in the master cell group of the AT 100 Or / and to reset the SRS resource (step S7)

That is, the UE 100 sets a value of the indicator Ri (Reconfiguration Indicator) corresponding to the index "SCellIndex i" of the serving cell to "1" and transmits a command signal (RadioConnectionReconfiguration Command) Lt; / RTI >

The terminal 100 that receives the command signal (RadioConnectionReconfiguration Command) for instructing the wireless connection re-establishment in the MAC layer control element determines that the master cell group having the indicator Ri value of "1" corresponding to the index "SCellIndex i" And resets the PUCCH / SRS resources of the serving cell using the PUCCH / SRS configuration information of the serving cell stored for the serving cell.

When a random access procedure based on the uplink data arrival event is performed in the main serving cell (PSCell) of the sub-cell group of the UE 100, the BS 200 transmits the PUCCH of the serving cell set in the sub- Or / and reset the SRS resources. That is, the mobile station 100 transmits a command signal (RadioConnectionReconfiguration Command) instructing wireless connection reset to the terminal 100 by setting the indicator Ri corresponding to the index "SCellIndex i" of the serving cell to "1".

The terminal 100 receiving the command signal (RadioConnectionReconfiguration Command) for instructing the wireless connection re-establishment of the sub-cell group having the indicator Ri value of "1" corresponding to the index "SCellIndex i" And resets the PUCCH / SRS resources of the serving cell using the PUCCH / SRS configuration information of the serving cell stored for the serving cell.

2 is a diagram for explaining a method for resuming data transmission / reception in a mobile communication system according to another embodiment of the present invention.

When a downlink data arrival event occurs in a non-synchronized state of the uplink synchronous state with the terminal 100 wirelessly connected to the base station 200 (step S10), the serving cell transmits a PDCCH indication (order ) To perform random access (RA) in the terminal 100 (step S11). At this time, the random access preamble index can be set to "0 ". The BS 200 transmits the interference and noise level of the PUCCH signal or SRS signal of the main serving cell (PCell) of the master cell group or the main serving cell (PSCell) of the sub cell group transmitted by the wirelessly connected UE 100 Signal to Noise Ratio (SNR) When the measured value is less than the reference value and lasts for a predetermined time, it can be changed to a non-synchronized state.

In the embodiment of FIG. 2 (Contention based Random Access), the success time of the random access procedure by the DL data arrival event is a time when the PDCCH for the C-RNTI is received at the UE 100. [ 3, when a random access response (RAR) including a random access preamble identifier (RAR) is received in the serving cell at the terminal 100, to be.

Thereafter, the serving cell of the base station 200 receives a preamble from the UE 100 (step S12). Then, the serving cell generates a random access response (RAR) based on the received preamble Response information to the terminal 100 (step S13)

Then, the UE 100 transmits a message (Msg3) including a C-RNTI MAC layer control element (CE) through a UL Grant (Uplink Resource Scheduling Information) resource obtained from random access response information (Step S14). After that, the base station 200 identifies the UE 100 as a C-RNTI MAC layer control element in the random access procedure of FIG. 2 due to the downlink data arrival event And transmits the downlink PDCCH to the C-RNTI (step S15). Then, the base station 200 transmits a command signal (RadioConnectionReconfiguration Command) for instructing a radio connection reset of the serving cell to the terminal 100 as a MAC layer control element (Step S16)

The UE 100 that receives a command signal (RadioConnectionReconfiguration Command) for instructing the wireless connection resetting is received from the MAC layer control element of the sub-cell group having the indicator Ri value of "1" corresponding to the index "SCellIndex i" And resets the PUCCH / SRS resource of the corresponding serving cell using the PUCCH / SRS setting information of the serving cell stored for the serving cell (step S17)

3 is a diagram for explaining a method for resuming data transmission / reception in a mobile communication system according to another embodiment of the present invention.

When a downlink data arrival event occurs in the non-synchronized state of the uplink synchronous state with the terminal 100 wirelessly connected to the base station 200 (step S20), the serving cell transmits a PDCCH indication (order The random access (RA) is performed by the terminal 100 (step S21). At this time, the random access preamble index may be set to a dedicated value. Thereafter, the serving cell of the base station 200 receives a preamble from the terminal 100 (step S22)

The base station 200 transmits a random access response (RAR) message to the mobile station 100 in the random access procedure of FIG. 3 due to the downlink data arrival event (step S23). And transmits a command signal (RadioConnectionReconfiguration Command) instructing the wireless connection reset of the serving cell to the terminal 100 as a MAC layer control element (step S24)

The random access procedure based on the downlink data arrival event is a random access procedure triggered by the downlink data arrival event in the main serving cell (PCell) of the master cell group or the main serving cell (PSCell) of the subcell group in the dual connectivity .

When a random access procedure based on a downlink data arrival event is performed in the main serving cell (PCell) of the master cell group of the UE 100, the BS 200 transmits the PUCCH of the serving cell set in the master cell group of the UE 100 (Step S25). That is, a command signal (RadioConnectionReconfiguration Command) for instructing wireless connection resetting is set by setting the indicator Ri corresponding to the index "SCellIndex i" of the serving cell to "1 & To the terminal 100 as a MAC layer control element.

The terminal 100 that receives the command signal (RadioConnectionReconfiguration Command) for instructing the wireless connection re-establishment in the MAC layer control element determines that the master cell group having the indicator Ri value of "1" corresponding to the index "SCellIndex i" The PUCCH / SRS resource of the corresponding serving cell is reset using the PUCCH / SRS setting information stored immediately before the PUCCH / SRS release for the serving cell.

On the other hand, when a random access procedure based on the downlink data arrival event is performed in the main serving cell (PSCell) of the sub-cell group of the UE 100, To reset the cell's PUCCH and / or SRS resources. That is, the mobile station 100 transmits a command signal (RadioConnectionReconfiguration Command) instructing wireless connection reset to the terminal 100 by setting the indicator Ri corresponding to the index "SCellIndex i" of the serving cell to "1".

The UE 100 that receives a command signal (RadioConnectionReconfiguration Command) for instructing the wireless connection resetting is received from the MAC layer control element of the sub-cell group having the indicator Ri value of "1" corresponding to the index "SCellIndex i" And resets the PUCCH / SRS resources of the serving cell using the PUCCH / SRS configuration information of the serving cell stored for the serving cell.

4 is a diagram for explaining a method for resuming data transmission / reception in a mobile communication system according to another embodiment of the present invention.

When a time alignment event of a serving cell corresponding to a sTAG (Secondary Timing Advance Group) of a wirelessly connected UE 100 occurs (Step S30), the BS 200 transmits a serving cell (Random Access) (RA) to the mobile station 100 (step S31). At this time, the random access preamble index may be set to a dedicated value. Thereafter, the serving cell of the base station 200 receives a preamble from the terminal 100 (step S32)

The base station 200 determines whether the time advance of the uplink channel of the serving cell belonging to the sTAG of the serving cell or the subcell group belonging to the sTAG of the master cell group set in the terminal 100 is out of the reference value, Based on the timer, random access can be directed for time alignment of the sTAG.

If the SNR measurement value of the SRS signal of the serving cell belonging to the sTAG of the serving cell or the sub-cell group belonging to the sTAG of the master cell group set in the terminal 100 is maintained for a predetermined time or less, The user may instruct random access for time alignment.

The terminal 100 transmits a specific preamble signal by a PDCCH indication Order and the base station 200 transmits the RAR to the terminal 100. In step S33, To the MAC layer control element, a command signal (RadioCConnectionReconfiguration Command) for instructing the wireless connection reset of the serving cell to which it belongs (step S34)

The random access procedure by the time alignment event of the sTAG includes a random access procedure triggered for time alignment in the sTAG of the master cell group or the sTAG of the sub-cell group in the dual connectivity.

When the random access procedure by the time alignment event is performed in the sTAG of the master cell group of the UE, the Node B 200 resets the SRS resources of the serving cell set in the sTAG of the master cell group of the UE 100 (RadioConnectionReconfiguration Command) for instructing wireless connection resetting is set as a MAC layer control element to the terminal 100 by setting the indicator Ri corresponding to the index "SCellIndex i" of the serving cell to "1 " do.

The terminal 100 that receives the command signal (RadioConnectionReconfiguration Command) for instructing the wireless connection re-establishment in the MAC layer control element determines that the master cell group having the indicator Ri value of "1" corresponding to the index "SCellIndex i" The SRS resource of the serving cell is reset using the SRS setting information stored immediately before the SRS release for the serving cell.

On the other hand, when the random access procedure by the time alignment event is performed in the sTAG of the sub-cell group of the UE, the BS 200 resets the SRS resource of the serving cell set in the sTAG of the sub-cell group of the UE 100 . That is, the mobile station 100 transmits a command signal (RadioConnectionReconfiguration Command) instructing wireless connection reset to the terminal 100 by setting the indicator Ri corresponding to the index "SCellIndex i" of the serving cell to "1".

The UE 100 that receives a command signal (RadioConnectionReconfiguration Command) for instructing the wireless connection resetting is received from the MAC layer control element of the sub-cell group having the indicator Ri value of "1" corresponding to the index "SCellIndex i" The SRS setting information of the serving cell stored for the serving cell is used to reset the SRS resource of the serving cell.

(RadioConnectionReconfiguration Command) for instructing wireless connection reset The MAC layer control element includes a reset instruction Ri corresponding to the index "SCellIndex i" of the serving cell as shown in FIG.

The MAC layer control element, which is a command signal (RadioConnectionReconfiguration Command) for instructing PUCCH / SRS resource resetting, is a unique identifier distinguished from an LCID (Logical Channel Identifier) definition value for a downlink SCH (Shared Channel) Lt; / RTI >

The MAC layer control element, which is a command signal (RadioConnectionReconfiguration Command) for instructing wireless connection reset from the base station 200 to the UE 100, includes a fixed size MAC Protocol Data Unit (PDU) subheader including a unique LCID .

The exemplary embodiment of the present invention can be used to transmit the PUCCH or / and the SRS resources at the completion of the random access procedure for resuming data transmission / reception to the base station 200 or the Carrier Aggregation (CA) and / CQI and SR transmission / reception and SRS signal transmission / reception through the PUCCH can be performed between the supporting base station 200 and the terminal 100 without delay.

Meanwhile, FIG. 7 illustrates a base station 200 and a terminal 100 that can be applied to an embodiment of the present invention.

A mobile communication system according to an embodiment of the present invention includes a terminal 100 and a base station 200.

Herein, the terminal 100 includes a processor 110, a memory 120, and a radio frequency (RF) unit 130. The processor 110 may be configured to implement the above random access procedures and / or methods proposed in embodiments of the present invention. The memory 120 is coupled to the processor 110 and stores various information related to the operation of the processor 110. [ The RF unit 130 is connected to the processor 110 and transmits and / or receives radio signals.

That is, in the embodiment of the present invention, the processor 110 of the UE 100 sets the PUCCH and SRS of the serving cell of the serving cell or the secondary cell group (SCG) of the master cell group (MCG) The PUCCH and the SRS setting information for each serving cell are stored in the memory 120 when receiving the RRC setting message or the reset message.

The processor 110 of the UE 100 maintains the PUCCH and SRS configuration information of the corresponding serving cell in the PUCCH and SRS resource release procedures and changes the PUCCH and SRS resources of the serving cell to the released state.

The base station 200 may also include a main serving cell (PCell) of a master cell group (MCG) 210 or a main serving cell (PSCell) of a sub cell group 220 have. One or more cells exist in one base station 200 to provide a downlink or uplink transmission service to the terminal 100. The base station 200 includes a processor 230, a memory 240, and a radio frequency (RF) unit 250.

Here, the processor 230 may be configured to implement the above random access procedures and / or methods proposed in embodiments of the present invention. The memory 240 is connected to the processor 230 and stores various information related to the operation of the processor 240. [ The RF unit 250 is coupled to the processor 230 and transmits and / or receives radio signals. The terminal 100 and the base station 200 may have a single antenna or multiple antennas.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: terminal
200: base station
110, 230: a processor
120, 240: Memory
130, 250: RF unit

Claims (19)

When an uplink data arrival event occurs in an uplink of an serving cell in an asynchronous state, transmitting a preamble from a terminal to a base station and receiving random access response information corresponding to the uplink data arrival event;
Transmitting uplink data to the base station through uplink resource scheduling information obtained from the random access response information;
Receiving a physical downlink control channel including uplink control information from the base station; And
Receiving a MAC (Medium Access Control) layer control element as a command signal for instructing a resource reset from the base station and resetting the resource; and resuming the data transmission / reception in the mobile communication system. 2. The method of claim 1, wherein the step of transmitting the uplink data through scheduling information of uplink resources obtained from the random access response information comprises:
The step of transmitting a Cell-Radio Network Temporary Identifier (MAC-RNTI) layer control element and a BSR (Buffer Status Report) to the serving cell through scheduling information of uplink resources obtained from the random access response information And resuming data transmission / reception in the mobile communication system. The method of claim 1,
A physical uplink control channel, and a sounding reference signal. The method of claim 1, wherein the at least one of the physical uplink control channel and the sounding reference signal comprises at least one of a physical uplink control channel and a sounding reference signal. The method according to claim 1,
And storing the physical uplink control channel and sounding reference signal setting information in the terminal when receiving a radio resource setup message or a reset message for the serving cells of the master cell group and the serving cells of the subcell group And resuming data transmission / reception in the mobile communication system. The method according to claim 1,
And resuming data transmission and reception in the mobile communication system by maintaining the predetermined physical uplink control channel and sounding reference signal information of the serving cell and releasing the resource in the releasing procedure of the resource Way. When a downlink data arrival event occurs in a downlink of a serving cell in an asynchronous state, transmitting a random access signal from the base station to the terminal;
Transmitting a preamble from the terminal to the base station and receiving random access response information corresponding to the preamble;
Transmitting uplink data to the base station through uplink resource scheduling information obtained from the random access response information;
Receiving a physical downlink control channel from the base station; And
Receiving a MAC (Medium Access Control) layer control element as a command signal for instructing a resource reset from the base station and resetting the resource; and resuming the data transmission / reception in the mobile communication system. 7. The method of claim 6, wherein the random access signal
And the preamble index is set to a value of "0 ". 7. The method of claim 6, wherein the random access signal
And the preamble index is set to a specific value. The method of claim 6, wherein the step of transmitting the uplink data through the scheduling information of the uplink resource obtained from the random access response information comprises:
The step of transmitting a Cell-Radio Network Temporary Identifier (MAC-RNTI) layer control element and a BSR (Buffer Status Report) to the serving cell through scheduling information of uplink resources obtained from the random access response information And resuming data transmission / reception in the mobile communication system. In the sixth aspect,
And storing the physical uplink control channel and sounding reference signal setting information in the terminal when receiving a radio resource setup message or a reset message for the serving cells of the master cell group and the serving cells of the subcell group And resuming data transmission / reception in the mobile communication system. The method according to claim 6,
And resuming data transmission and reception in the mobile communication system by maintaining the predetermined physical uplink control channel and sounding reference signal information of the serving cell and releasing the resource in the releasing procedure of the resource Way. when a time alignment event of a serving cell corresponding to a sTAG (Secondary Timing Advance Group) occurs, transmitting a random access signal from the base station to the mobile station;
Transmitting a preamble from the terminal to the base station and receiving random access response information corresponding to the preamble; And
Receiving a MAC layer control element as a command signal for instructing a resource re-establishment from the base station, and re-establishing resources in the mobile communication system. 13. The method of claim 12,
And resuming data transmission / reception in the mobile communication system. 13. The method of claim 12, wherein the random access signal
And the preamble index is set to a specific value. 13. The method of claim 12,
And storing sounding reference signal setting information in the terminal when receiving a radio resource setting message or a reset message for serving cells of a master cell group and serving cells of a sub-cell group, in the mobile communication system / RTI > 13. The method of claim 12,
The method of claim 1, further comprising the step of maintaining the predetermined sounding reference signal information of the corresponding serving cell and changing the resource to the released state in the releasing procedure of the resource. 13. The method of claim 12, wherein the command signal
And a reset indication corresponding to an index of the serving cell comprises a reconfiguration indicator (Ri). 13. The method of claim 12, wherein the command signal
Wherein a fixed size MAC Protocol Data Unit (PDU) subheader including a unique LCID (Logical Channel Identifier) is used. A memory for storing a physical uplink control channel and sounding reference signal setting information when receiving a radio resource setting message or a reset message for serving cells of a master cell group and serving cells of a sub cell group;
A radio frequency unit for communicating with the base station including the serving cells of the master cell group and the serving cells of the sub-cell group; And
And a processor for resetting a resource of a corresponding serving cell using configuration information stored in the memory when a Medium Access Control (MAC) layer control element is received as a command signal for instructing a resource re-establishment from the base station. A system for resuming data transmission and reception in a system.

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