KR100736567B1 - Mobile communication terminal and method for radio link control unrecoverable error using the same - Google Patents

Abstract

A mobile terminal and a method for handling an RLC(Radio Link Control) unrecoverable error using the same are provided to facilitate re-transmission of data by storing and displaying information of the data. A transmitting/receiving unit(310) receives an unrecoverable error message of an RLC while transmitting/receiving data through an allocated dedicated channel. A memory unit(330) stores information about the transmitted/received data. When the unrecoverable error message of the RLC is received through the transmitting/receiving unit(310), a controller(350) releases connection with the dedicated channel to change a mobile terminal to an idle mode, and stores the transmitted/received data in the memory unit(330).

Description

Mobile communication terminal and method for handling RCC irrecoverable error using the same {Mobile Communication Terminal and Method for Radio Link Control Unrecoverable Error Using the Same}

1 is a block diagram showing a mobile communication system to which a mobile communication terminal according to an embodiment of the present invention is applied.

2 is a block diagram showing the structure of a radio interface protocol of the mobile communication system shown in FIG.

3 is a block diagram illustrating a radio bearer (RB) in accordance with an embodiment of the present invention.

4 is a block diagram illustrating a state of a radio resource control (RRC) layer shown in FIG.

5 is a block diagram showing the configuration of a mobile communication terminal according to an embodiment of the present invention.

6 is a flowchart illustrating a method of handling an RLC irrecoverable error in a mobile communication terminal according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: UTRAN 200: core network

300: mobile communication terminal 310: transceiver

320: input unit 330: memory unit

340: Display unit 350: Control unit

360: timer

The present invention relates to a mobile communication terminal and a method of handling an RLC irrecoverable error using the same.

UMTS (Universal Mobile Telecommunications System) is a third generation mobile communication system that has evolved from the European standard Global System for Mobile Communications (GSM) system.It is based on GSM Core Network and Wideband Code Division Multiple Access (WCDMA) access technologies. The aim is to provide a better mobile communication service.

This third generation mobile communication system uses a standard specification by the 3rd Generation Partnership Project (3GPP).

Typically, in a 3GPP network, when a user's mobile terminal is receiving data, the T314 or T315 timer operates when a radio environment is deteriorated and an irreparable error of RLC (Radio Link Control) occurs. do.

Therefore, if a cell having a strong electric field is found within a time period when the timer operates, the mobile communication terminal performs a cell update process as much as N302.

However, if the user's mobile terminal has an RLC irrecoverable error, it takes a long time for the mobile terminal to return to the standby state during the above process.

Accordingly, the user has to wait for a long time until the state can receive other services.

The object of the present invention for solving the problems of the prior art is as follows.

First, the purpose of the RLC non-recoverable error message to quickly enter the idle mode (Idle Mode) upon receipt.

Second, the purpose is to facilitate retransmission by storing and displaying information of data.

In order to achieve the above object, a mobile communication terminal of the present invention includes a transceiver for receiving an unrecoverable error message of radio link control during transmission and reception of data through an assigned dedicated channel, and a radio unit. When receiving the unrecoverable error message of the link control, the control unit for releasing the connection of the dedicated channel (Release) to terminate the transmission and reception of data, and to switch to the idle mode (Idle Mode).

In this case, the apparatus further includes a memory unit for storing the information of the data, and the controller controls to store the information of the data in the memory unit when switching to the idle mode.

Here, the information of the data is characterized in that it includes the size of the data transmitted and received and the address information for transmitting and receiving data.

The apparatus further includes a display unit for displaying whether data is transmitted or received and information on the data.

At this time, the controller is characterized by controlling to request a reconnection according to the user's selection by using the information of the data.

In another aspect of the present invention, a method of handling an RLC irrecoverable error using a mobile terminal of the present invention provides an irrecoverable error message of a radio link control while transmitting and receiving data through an assigned dedicated channel. Receiving transmission and reception steps, and receiving a non-recoverable error message of the radio link control, disconnection of the dedicated channel to terminate the transmission and reception of data and switch to idle mode (switch mode) It includes.

In this case, the method may further include storing information of the data.

Here, the information of the data is characterized in that it includes the size of the data transmitted and received and the address information for transmitting and receiving data.

The method may further include displaying whether data is transmitted or received and information on the data on a predetermined display unit.

The method may further include requesting reconnection according to a user's selection by using the information of the data.

Hereinafter, a mobile communication terminal and a method of handling an RLC irrecoverable error using the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a mobile communication system according to an embodiment of the present invention is a third generation mobile communication system evolved from a global system for mobile communications (GSM) system as a universal mobile telecommunication system (UMTS).

Such a UTMS system comprises the UTRAN 100 and the core network 200.

First, the first component of the UTMS system UTRAN 100 is composed of one or more Radio Network Sub-systems (RNS) 110, 120, each RNS (110, 120) is one or more radio It consists of a Radio Network Controller (RNC) 112, 122 and one or more Node Bs (base stations 114, 116, 124, 126) managed by each of the RNCs 112, 122.

Here, the Node Bs 114, 116, 124, and 126 are managed by the RNCs 112 and 122. The uplink receives information transmitted from the physical layer of the mobile communication terminal UE 300 and uses the downlink. Transmits data to the mobile communication terminal 300 and serves as an access point of the UTRAN 100 to the mobile communication terminal 300.

The RNCs 112 and 122 are responsible for the allocation and management of radio resources and serve as access points to the core network 200.

The core network 200, which is the second component of the UTMS system, requests an end-to-end Quality of Service (QoS) requirement as an RAB, and the RAB supports QoS requirements set by the core network 200. Accordingly, the UTRAN 100 may meet end-to-end QoS requirements by configuring and maintaining a Radio Access Bearer (RAB) for a call between the mobile terminal 300 and the core network 200.

In the UMTS system, a service provided to a mobile communication terminal (UE) 300 is classified into a circuit switching service and a packet switching service. Here, the circuit switched service refers to a general voice telephone service, and the packet switched service refers to a whip browsing service through an Internet connection.

When supporting circuit switched services, the radio network controllers (RNCs) 112 and 122 are connected to a gateway mobile switching center (GMSC) 210 that manages connections with other networks.

In addition, the packet switched service is provided by the Serving GPRS Support Node (SGSN) 220 and the Gateway GPRS Support Node (GGSN) 230 of the core network. SGSN 220 supports packet communication directed to Serving RNC (SRNC) of UTRAN, and GGSN 230 manages connection with other packet switched networks (eg, the Internet network).

Referring to FIG. 1, the air interface protocol structure of the mobile communication system according to an embodiment of the present invention will be briefly described with reference to FIG. 2.

FIG. 2 is a block diagram showing the structure of a radio interface protocol of the mobile communication system shown in FIG.

As shown in FIG. 2, the air interface protocol layer of the mobile communication system includes a physical layer 400, a radio data link layer 410, a radio resource layer (hereinafter RRC) 420, and a radio bearer layer 430. It is done by

Such a layer may be applied to the mobile communication terminal 300 and the UTRAN 100 in the same manner. In the present invention, the air interface protocol layer of the mobile communication terminal 300 and the UTRAN 100 will be described with reference to FIG. 2.

In addition, the RRC layer 420, which is the third layer of the radio protocol in which the radio network controller (RNC) 112 and 122 and the mobile communication terminal 300 in FIG. 1, are defined. The RRC layer 420 is responsible for controlling transport channels and physical channels in connection with the setup, reconfiguration, and release of radio bearers (RBs).

Here, the radio bearer RB will be described in more detail with reference to FIG. 3.

3 is a block diagram illustrating a radio bearer RB according to an embodiment of the present invention.

As shown in FIG. 3, the radio bearer (RB) 112, 302 is connected to the radio data link layer 410, which is the second layer of the radio protocol, for data transfer between the mobile communication terminal 300 and the UTRAN 100. Means the service provided by In general, the establishment of radio bearers (RBs) 112 and 302 means a process of defining the protocol layer and channel characteristics necessary for providing a specific service and setting each specific parameter and operation method.

When the RRC layer 420 of the user mobile terminal 300 and the RRC layer 420 of the UTRAN 100 are connected to exchange RRC messages with each other, the mobile terminal 300 is in an RRC connection mode. Mode, and when not connected, it is in Idle Mode.

In particular, the mobile communication system 10 assigns the mobile communication terminal 300 to a specific RNS 110, which then serves as a serving RNS (SRNS) 110 of the mobile communication terminal 300. It is called.

Thus, the data designated for the mobile communication terminal 300 is transmitted to the SRNS 110 by the core network 200 (or the UTRAN 100. This data has a specific data structure and is one of a plurality of radio bearers (RBs). It can be seen that it is transmitted in the form of one or more packets moving along.

The radio bearer (RB) 112 set up for the mobile communication terminal 300 will have a radio bearer (RB) 302 set up to correspond to the serving RNS 110. This, radio bearer (RB) 112, 302 is continuously RB ₀ To RB _n .

Typically RB ₀ To RB ₄ are allocated signaling RBs (SRBs), which are used to pass protocol signals between the UTRAN 100 and the mobile terminal 300, and RB ₅ to RB ₆ Radio bearers (RBs) 112 and 302 are used to carry user data.

An RLC irrecoverable error occurs in the signaling RB of the RRC layer 420. Here, the state of the RRC layer 420 is illustrated in FIG.

4 is a block diagram illustrating a state of a radio resource control (RRC) layer illustrated in FIG. 2.

As shown in FIG. 4, the RRC layer 420 has two primary states: standby mode 420a and UTRA RRC connected mode 420b. At this time, while in the standby mode, the RRC layer 420 does not have an open communication line with its peer RRC layer 420.

That is, there are available SRBs 112 and 302 that enable communication between peer RRC layers 420 except RB ₀ , which is a common channel available to all mobile communication terminals 300 of UTRAN 100. I never do that.

Once the RRC layer 420 of the mobile terminal 300 establishes a connection with the peer RRC layer 420 on the UTRAN 100 (ie, RB _0). SRBs 112 and 302 of RB ₄ and an RRC layer (not shown) of the mobile communication terminal 300 are switched to the UTRA RRC connection mode 420b.

This connection usually starts along the shared channel RB ₀ , and internally the UTRA RRC connected mode 420b has four states: CELL_DCH 421, CELL_FACH 422, CELL_PCH 423 and URA_PCH 424. .

Here, the CELL_DCH state 421 indicates that the Dedicated Channel (DCH) is uplink (from the mobile terminal 300 to the UTRAN 100) and downlink (from the UTRAN 100 to the mobile terminal 300). It is assigned to the mobile communication terminal 300 for communication.

The CELL_FACH state 422 is not assigned a dedicated channel to the mobile terminal 300, but instead is assigned a default common or shared transport channel for the uplink to the mobile terminal 300.

In the CELL_PCH state 423, a dedicated physical channel is not allocated to the mobile communication terminal 300, an uplink operation is impossible for the mobile communication terminal 300, and the position of the mobile communication terminal 300 is transmitted to the UTRAN 100. It is characterized by what is known.

In the URA_PCH state 424, a dedicated physical channel is not allocated to the mobile communication terminal 300, an uplink operation is impossible for the mobile communication terminal 300, and the position of the mobile communication terminal 300 is transmitted to the UTRAN 100. It is characterized by what is known.

In this case, the user mobile communication terminal 300 transmits and receives a packet in a state in which the user terminal is connected to exchange the RRC message with the UTRAN 100 in the CELL_DCH state 421 to which the dedicated channel is allocated.

When the user mobile communication terminal 300 transmitting / receiving a packet through the CELL_DCH channel moves to a weak electric field such as an underground or an elevator having a poor wireless transmission / reception environment, the sync of the physical layer 400 is turned on, and thus the data cannot be transmitted and received normally. .

Accordingly, when the mobile communication terminal 300 receives an "out of Sync" message indicating that the sink is turned off through the DPCCH channel of the physical layer 400, the mobile communication terminal 300 drives the T313 timer.

Looking at the configuration and operation of the mobile communication terminal 300 according to an embodiment of the present invention in such a state in more detail as follows.

5 is a block diagram showing the configuration of a mobile communication terminal according to an embodiment of the present invention.

As shown in FIG. 5, the mobile communication terminal 300 according to an embodiment of the present invention includes a transceiver 310, an input unit 320, a memory unit 330, a display unit 340, and a controller 350. And a timer unit 360.

First, the transceiver 310 communicates with the base station through the antenna ANT to transmit data generated in the mobile communication terminal 10 to the base station through the antenna ANT and through the antenna ANT. Allow data from the base station to be received.

The transceiver 310 receives an RLC irrecoverable error message while transmitting and receiving data through a dedicated channel.

The input unit 320 includes a numeric key and various function keys. When the user inputs a key for downloading and uploading specific data, the input unit 320 generates a signal corresponding thereto and outputs the signal to the controller 350.

The memory unit 330 may be composed of a flash memory, a RAM, an electrically erasable programmable read only memory (EEPROM), and the like, and a predetermined program for controlling the overall operation of the mobile communication terminal 300 is stored. In addition, the memory 330 stores data received through the transceiver 310.

The display unit 340 displays a status of downloading and uploading a menu or specific data selected by the user through the input unit 130, various information signals from the control unit 350, and the like.

The controller 350 includes a mobile station modem (MSM) to control general input / output of the mobile communication terminal 300. In addition, when receiving the RLC irrecoverable error message received through the transceiver 310, the transmission and reception of data in progress is terminated and the mobile terminal 300 is controlled to switch to the idle mode (Idle Mode).

The timer 360 includes a timer such as T313 362 set to operate for a predetermined time and drives the T313 362 under the control of the controller 350.

Looking at the operation of the present invention configured as described above are as follows.

6 is a flowchart sequentially illustrating a method of handling a radio link control irrecoverable error of a mobile communication terminal according to an embodiment of the present invention.

As shown in FIG. 6, the method for handling radio link control irrecoverable error of the mobile communication terminal 300 according to an embodiment of the present invention includes a radio link during transmission and reception of data through an assigned dedicated channel. Receiving and receiving an unrecoverable error message of radio link control, and receiving an unrecoverable error message of radio link control, releases the connection of the dedicated channel to terminate data transmission and reception and waits (Idle). Disconnection and standby mode switching.

First, a user accesses a desired wireless Internet site using the input unit 320 (S610) and selects download of specific data (hereinafter, data) (S620).

As described above with reference to FIG. 3, when the mobile communication terminal 300 accesses the wireless Internet site and downloads data, a dedicated channel is allocated to the mobile communication terminal 300 (S630).

That is, data is downloaded while the dedicated channel is connected to exchange the RRC message with the UTRAN 100 in the allocated CELL_DCH state (421 of FIG. 3). At this time, data is transmitted in predetermined packet units.

In this state of downloading data, the control unit 350 checks whether an unrecoverable error message of a radio link control is received through the transceiver 310 (S640).

Here, the causes of the irrecoverable error message of the radio link control according to the embodiment of the present invention are the same as the general causes.

Briefly, when the user's mobile communication terminal 300 moves to a weak electric field such as an underground or an elevator, which is a shaded area having a poor wireless transmission / reception environment, the physical layer 400 of the mobile communication terminal 300 and the UTRAN 100 ) Is not synchronized.

At this time, the controller 350 operates the T313 timer 362 of the timer unit 360 and attempts to synchronize. Here, when the retransmission for synchronization reaches the maximum value MAX before the T313 timer 362 expires, it is recognized as a radio link control irrecoverable error.

Accordingly, the UTRAN 100 transmits a radio link control irrecoverable error message to the mobile communication terminal 300.

If such an irreparable error message of the radio link control is not received, it is determined whether the user terminates the transmission of the data by using the input unit 320 (S650). Otherwise, the data is continuously downloaded.

However, when an unrecoverable error message of radio link control is received in step S640, the controller 350 releases the connection of the dedicated channel and terminates downloading of the corresponding data (S660).

Thereafter, the controller 350 switches the mobile communication terminal 300 to an idle mode (S670). As a result, the mobile communication terminal 300 quickly switches to an idle mode upon receiving an irreparable error message of the radio link control so that the user can quickly receive a general service.

Thereafter, the control unit 350 stores the information of the data, for example, the size of the data and the address information, in which the data has been simply loaded, in the memory unit 330 and displays it on the display unit 340 (S680).

Accordingly, by checking the information of the data displayed on the display unit 340 and reconnecting to the corresponding address, the user can download the data that the download did not complete normally due to the RLC irreparable error message.

At this time, the size of the transmitted / received data included in the information of the data can be checked and downloaded again after the size thereof, so that the data can be inherited.

However, the inheritance of such data is not limited thereto, and various methods may be used.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art.

Accordingly, the present invention should not be limited by the foregoing embodiments and the accompanying drawings, but should be interpreted in support of the claims.

As described above, the present invention has the following effects.

First, when the RLC non-recoverable error message is received, the user is quickly switched to the idle mode, thereby enabling the user to receive general services quickly.

Second, it is easy to retransmit by storing and displaying the information of the data.

Claims (10)

A transceiver for receiving an unrecoverable error message of Radio Link Control while transmitting and receiving data through an assigned dedicated channel; A memory unit for storing information of the transmitted and received data; When the unrecoverable error message of the radio link control is received through the transceiver, the connection to the dedicated channel is released to switch to an idle mode and to store the information of the transmitted and received data in the memory unit. Control unit; Mobile communication terminal comprising a. delete The method of claim 1, The information of the data, And a size of the transmitted and received data and address information for transmitting and receiving the data. The method of claim 1, And a display unit for displaying whether or not the data is transmitted and received and the information of the data. The method of claim 4, wherein The control unit, And requesting reconnection according to a user's selection by using the information of the data. Receiving an irrecoverable error message of Radio Link Control while transmitting and receiving data through an assigned dedicated channel; Upon receiving the irrecoverable error message of the radio link control, disconnecting the dedicated channel to terminate transmission and reception of the data and to store the information of the data; Switching to an idle mode according to the termination of the data transmission and reception; RLC irrecoverable error handling method using a mobile communication terminal comprising a. delete The method of claim 6, The information of the data, And a size of the transmitted / received data and address information of the transmitted / received data. The method of claim 8, And displaying the information on whether or not the data is transmitted and received and displaying the data on a predetermined display unit. The method of claim 9, And requesting a reconnection according to a user's selection by using the information of the data.

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