KR100623871B1 - Method for protecting a wrong operation related network registration according to overload - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method for preventing a malfunction related to network registration due to overload in a wireless communication terminal.

2. The technical problem to be solved by the invention

According to the present invention, in the situation where the digital signal processing unit (DSP) is overloaded due to voice recording and video recording in a wireless communication terminal (eg, a GSM terminal linked to GPRS), the terminal changes a cell and performs cell update. When the digital signal processor (DSP) is overloaded, failures occur during voice recording or movie recording due to the continuous repetition of cell update attempts and rejects between the RD (RLC-MAC layer) and the GRS (GPRS Radio Resource management). The purpose of the present invention is to provide a method of preventing a malfunction related to network registration due to an overload in a wireless communication terminal, in order to prevent arising from occurring and to smoothly record and record a video even during a cell update.

3. Summary of Solution to Invention

The present invention provides a method for preventing a malfunction related to network registration due to an overload in a wireless communication terminal. When the digital signal processing unit (DSP) is overloaded in the wireless communication terminal, a layer 1 (L1) to a GRR (GPRS Radio Resource management) Informing suspend state information of the layer 1 (L1) and informing reception levels of a serving cell and a neighbor cell at periodic time intervals; When the GRR has a better reception level of the neighbor cell through the reception level reported from the layer 1 (L1), a cell reselection algorithm is applied to change the serving cell, GRS (GPRS Mobility Management) and RD (RLC). / MAC layer); And performing a cell update after the GMM determines that the layer 1 (L1) is in an idle state.

4. Important uses of the invention

The present invention is used in a wireless communication terminal.

Wireless communication terminal, overload, video and audio recording, cell update, Z malfunction prevention

Description

Method for protecting a wrong operation related network registration according to overload in wireless communication terminal

1 is a diagram illustrating a cell update process when a cell is changed in a conventional wireless communication terminal.

2 is a diagram illustrating an operation between layers when a cell update occurs in a wireless communication terminal according to the present invention.

The present invention relates to a method of preventing a malfunction related to network registration due to an overload in a wireless communication terminal. More particularly, the present invention relates to a digital signal processing unit due to voice recording and video recording in a wireless communication terminal (eg, a GSM terminal linked to a GPRS). When the terminal changes the cell in the situation where the DSP is overloaded, and wants to update the cell (Cell Update), due to the overload of the digital signal processor (DSP), the cell between the RD (RLC-MAC layer) and GRS (GPRS Radio Resource management) Network registration due to overload in the wireless communication terminal for smooth recording of voice and video even during cell update by preventing failures during voice recording or movie recording by continuous repetition of update attempt and reject. It relates to a related malfunction prevention method.

In the present invention, a wireless communication terminal is a mobile communication terminal, a personal mobile communication terminal (PCS), a personal digital assistant (PDA), a smart phone, a next generation mobile communication terminal (IMT-2000), such as a wireless LAN terminal while carrying the individual A terminal capable of wireless communication.

GSM (Global System for Mobile communication) service can be divided into circuit service (Circuit Service) and packet service (Packet Service), the circuit service can be used to register the service in the network through the Location Update (LU) to use the service. The packet service may use a packet service using GPRS ATTACH / Routing Area Update / Cell Update.

1 is a diagram illustrating a cell update process in a cell change in a conventional wireless communication terminal.

The GSM terminal is defined in the protocol stack and measures the control unit (baseband chip) and related devices, the layer 1 (Layer 1: L1) having an RF transceiver, and the broadcast control channel (BCCH) decoding and reception level. Radio resource management (RR) for establishing, maintaining, and releasing cell selection / reselection and radio resource management (RR) connections, and for transmitting mobility data and packet data for controlling mobility. Layer 2 and RD (RLC / MAC layer).

When the user performs voice recording or video recording with a GSM terminal, the digital signal processing unit (DSP) has a load. At this time, the layer 1 (L1) has a load on the digital signal processing unit (DSP). ). The GSM terminal linked to the GPRS (General Packet Radio Service) registers the location of the terminal in the network through periodic routing area update and cell update. In layer 1 (L1) periodically (for example, every 0.5 seconds), the reception level is transmitted to GPRS Radio Resource Management (GRR), where GRR is a cell when the neighbor cell has better reception power than the serving cell. The cell is changed using a cell reselection algorithm and transferred to the RD / RLC and mobility management. Mobility Management (MM) performs Location Update (LU) when Location Area Code (LAC) / Routing Area Code (RAC) is changed, and RLC (RLC / MAC layer) is Cell if Cell is changed Perform a Cell Update.

The Location Update (LU) procedure requests the establishment of a connection to RR (Radio Resource Management). When the RR is connected, it sends a location update message to the network and receives a location accept. RAC (Routing Area Code) requests packet channel setting through RD (RLC / MAC layer) and GPRS Radio Resource management (GRR) to receive channel allocation and then Routing Area update message ) And release the packet channel after receiving the Accept Message. In the cell update, when the RD (RLC / MAC layer) requests channel establishment from the GRS (GPRS Radio Resource management), the GRR allocates a packet channel and performs a cell update.

Referring to FIG. 1, when voice recording or video recording is performed in a wireless communication terminal (eg, a GSM terminal linked to GPRS), the digital signal processing unit (DSP) is heavily loaded, and the layer 1 layer (L1) temporarily stops GPRS. (GPRS Suspend) state, and conveys the state of L1 to GPRS Radio Resource management (GRR). However, when a cell change is made, an RLC / MAC (Radio Link Control / Medium Access Control) layer sends a setup request message to GRR. In GRR, L1 is paused by checking the state of L1. (suspend), so it raises a fail indicator to the RLC / MAC. RD (RLC / MAC layer) repeats four times when the failure indicator (fail ind) is raised, RD initializes the count (Count) and sends a trigger indicator (Grigger Ind) to the GMM (GPRS Mobility Management). Since the GMM is not currently in a Suspend state, it sends a trigger req message to the RLC / MAC again, and again, the RLC / MAC layer receiving the GRR (GPRS Radio) for cell change is performed. If you request Establish to Resource management, GRR is in a suspended state, so the process of sending a failure indicator to RLC / MAC repeatedly occurs, causing another task to occupy. There was a problem that the malfunction occurred.

The present invention has been proposed to solve the above problems, the cell in the situation where the digital signal processing unit (DSP) is overloaded in the wireless communication terminal (eg GSM terminal interlocked with GPRS) due to voice recording and video recording, etc. In this case, due to the overload of the digital signal processing unit (DSP), cell update attempts and rejection are repeated between RD (RLC-MAC layer) and GPRS Radio Resource management (GRR). It is an object of the present invention to provide a method of preventing malfunction related to network registration due to an overload in a wireless communication terminal, in order to prevent an error from occurring during voice recording or video recording, thereby making voice recording and video recording smooth during cell update. .

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In the method of the present invention for achieving the above object, in the method of preventing a network registration-related malfunction due to overload in the wireless communication terminal, when the digital signal processing unit (DSP) is overloaded in the wireless communication terminal in layer 1 (L1) Informing the status of the layer 1 (L1) suspend state to the GPRS radio resource management (GRR) and informing the reception level of the serving cell and the neighbor cell at periodic time intervals. ; When the GRR has a better reception level of the neighbor cell through the reception level reported from the layer 1 (L1), a cell reselection algorithm is applied to change the serving cell, GRS (GPRS Mobility Management) and RD (RLC). / MAC layer); And performing a cell update after the GMM determines that the layer 1 L1 is in an idle state.

The above objects, features, and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. Could be. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

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

2 is a diagram illustrating an operation between layers when a cell update occurs in a wireless communication terminal according to the present invention.

A protocol stack of a wireless communication terminal (for example, a GSM terminal linked to a GPRS (General Packet Radio Service)) may include a GPRS Mobility Management (GMM), a physical channel, or a control (GMM), which is responsible for letting the network know the location information of the terminal. control (GPRS) Radio Resource management (GRR) that manages the transmission of channels, RLC (RLC-MAC layer) for transmitting RLC / MAC block data, including packet data, and the bottom layer of the protocol stack. It includes L1 (Layer 1) for the transmission of.

The GSM (Global System for Mobile communication) terminal is defined in the protocol stack, and includes a layer 1 (L1) and a BCCH (Broadcast) including a control unit (baseband chip), an associated device, an RF transceiver, and the like. RR (Radio Resource management) to measure and deselect cell selection / reselection and radio resource connection by measuring decoding and reception levels, GPRS Mobility Management (GMM) to control mobility, It consists of Layer 2 and RD (RLC-MAC layer) for transmitting packet data.

When a cell update occurs, the conventional method is that the digital signal processing unit (DSP) is heavily loaded when voice recording or video recording is performed on a wireless communication terminal (eg, a GSM terminal linked to GPRS). In the GPRS suspend state, and informed only to the GRS (GPRS Radio Resource management) of the status of the L1, in the present invention, the GMM (GPRS Mobility Management) that manages the mobile information of the terminal in the GRR, the status information of the L1 Inform.

State of L1 in GMM (GPRS Mobility Management) when cell update is performed by changing cell information during voice recording or video recording in a wireless communication terminal (eg, a GSM terminal linked to GPRS) according to the present invention. Because we know the information, we wait until the end of movie recording or voice recording, and when the process is over, the RD (RLC / MAC layer) sends a message to the GRR (GPRS Radio Resource management) to set up a message (establish req). Will be prevented.

As shown in FIG. 2, when the digital signal processing unit (DSP) is overloaded due to voice recording or video recording in a wireless communication terminal (eg, a GSM terminal linked to GPRS), the GRR is performed at Layer 1 (Layer 1: L1). (GPRS Radio Resource Management) informs L1 status information that L1 is suspended (①). At this time, the layer 1 (L1) informs the GRR of the reception level for the serving cell and the neighbor cell at regular intervals (for example, 0.5 seconds) (②).

The GPRS radio resource management (GRR) is a serving cell by applying a cell reselection algorithm when the neighbor cell has a higher reception level through the reception level reported from the layer 1 (L1). ) And informs GMM (GPRS Mobility Management) and RD (RLC / MAC layer) (③) to perform cell update in the GMM.

If the digital signal processor DSP is overloaded, and the layer 1 L1 informs the GRR (GPRS Radio Resource management) of L1 status information that L1 is suspended (①), the GRR ( GPRS Radio Resource Management) informs GMM and RD (RLC / MAC layer) that L1 is suspended through ④ and ⑤.

The GMM and RD check whether the state of the current L1 is Suspend. If the state of the L1 is suspended, the GMM and the RD do not register the network and then check again through GRR (Radio Resource management). If you fall into an idle state, you have to register your network. Therefore, by transmitting the status information of the L1 to the upper layer through the GRS (GPRS Radio Resource management) to attempt / retain the network registration according to the status information of the L1 to prevent malfunction in the suspended (Suspend) state.

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 to which the present invention pertains. It is not limited by the drawings.

As described above, the present invention provides a cell update by changing a cell during video recording or voice recording in a wireless communication terminal (GSM terminal linked to GPRS for packet service) that supports video recording and voice recording. If this occurs, there is an effect that can prevent the malfunction of the terminal caused by the overload of the digital signal processor (DSP).

Claims (1)

In the method of preventing a network registration-related malfunction due to overload in a wireless communication terminal, When the digital signal processor (DSP) is overloaded in the wireless communication terminal, the layer 1 (L1) informs the GRR (GPRS Radio Resource management) of the layer 1 (L1) suspend status information at regular time intervals. Informing reception levels of a serving cell and a neighbor cell; When the GRR has a better reception level of the neighbor cell through the reception level reported from the layer 1 (L1), a cell reselection algorithm is applied to change the serving cell, GRS (GPRS Mobility Management) and RD (RLC). / MAC layer); And Performing a cell update after the GMM determines that the layer 1 L1 is idle Method for preventing a network registration-related malfunction due to overload in a wireless communication terminal comprising a.

Images