KR100434043B1 - Error processing method for pdcp - Google Patents

Abstract

The present invention relates to a method for error handling of a PD, in which a Radio Resource Control (RRC) is referred to as a Radio Resource Control (RRC) in a next generation mobile communication terminal system of a DS (DIRECT SPREAD) map method. (PDCP; PACKET DATA CONVERGENCE PROTOCOL, hereinafter referred to as PDPC) and the radio resource controller malfunction prevention method for preventing malfunction and normal processing is performed. To this end, the present invention comprises a first step of configuring an environment of a PD layer after receiving a PD request message from a radio resource controller and outputting a result message and a cause message according to the request message to the radio resource controller; And a second process of performing the PD-specific function by exchanging data messages with upper and lower layers under the message control. Therefore, when the PD request message is received from the radio resource controller, the PD configures an environment necessary for allocating a resource and performing a function of the corresponding radio bearer, and reports whether the environment configuration is successful to the radio resource controller. As a result, the operation of the stable PD layer is guaranteed, which increases the call quality of the packet data service.

Description

ERROR PROCESSING METHOD FOR PDCP}

The present invention relates to a method for error handling of PDs, and in particular, in a next generation mobile communication terminal system using a DS (DIRECT SPREAD) map method, a Radio Resource Control (RRC) is referred to as a Radio Resource Control (PD). PDCP (PACKET DATA CONVERGENCE PROTOCOL, hereinafter referred to as PDPC) and the radio resource control unit are related to the error handling method of PDPC which prevents malfunction and ensures normal processing.

1 is a flowchart illustrating a conventional method of performing a PD function, and as shown therein, receives a PD request message (CPDCP_Config_REQ Message) from a radio resource controller (RRC), which is a higher layer, and configures an environment accordingly ( S11) Performs a PD function according to a message transmitted from an upper layer (S12) and releases the PD request message from the radio resource controller (S13).

When the PD layer receives the PD request message of the corresponding resource control part from the radio resource controller, it configures the PD layer required to perform the PD function based on the contents of the parameters of the message. If the support for lossless SRNS relocation element is '1', the memory allocation to support SRNS reset without loss and support the functions If necessary, the PD Layer should allocate memory for use in the system.

FIG. 2 is a diagram illustrating a message and a parameter interacting between a conventional PD layer and a higher layer. As shown in FIG. 2, a message which is always required to perform the PD layer function is configured to release and configure an environment of the PD layer. The PDPC request message (CPDCP_Data_Req), the PDPC transmission message (PDCP_Data_Ind) for requesting data transmission from the lower layer to the upper layer.

In addition, in case of supporting the SNS resetting support element, sequence number synchronization (CPDCP_SN_Req), reordering request (CPDCP_Reloc_Req), and reordering confirmation (CPDCP_Reloc_Conf) messages are used.

Conventionally, the parameters of the PD request message include PDCP information (PDCP-Info), service access location (RLC-SAP), and sequence number synchronization (SN Sync).

The service access point (RLC-SAP) is a parameter indicating whether or not the PD layer of the corresponding radio bearer (RB) performs the sequence number synchronization.

The PDCP-Info defines a range of functions that the PDCP should support from the radio resource controller, and the component of the PDCP-Info does not lose the PD as shown in FIG. 3. Support for SRNS relocation indicating whether or not to support the RNS reset and the maximum PDCP sequence number window size indicating the maximum number of sequences that the PD can count And a PDCP PDU Header indicating whether the PDCP SDU is clearly transmitted to the lower layer and a header indicating whether the PDCP layer supports header compression. There is compression information.

In addition, the PD information includes elements such as algorithm type selection indicating which algorithm should be used when supporting the header compression.

When the PD layer receives the PD request message from the radio resource controller, the PD should allocate a memory resource for performing a function or configure other environment.

That is, three cases may be considered when the message is received and the developer uses the memory to perform a function.

First, FIG. 4 is a flowchart illustrating a memory allocation method according to a conventional PD function, and as shown in FIG. 4, a system loads a PD layer in the system (S41) and simultaneously loads all memories necessary for performing the PD function. (S42) and receive a PD request message from the radio resource control unit (S43) to perform the PD function.

Second, FIG. 5 is a flowchart illustrating a memory allocation method according to another conventional PD function execution. As shown in FIG. 5, a PD layer is loaded in a system (S51) and a PD request is received from a radio resource controller. A message is received (S52), and a memory necessary for the PD function for the radio resource controller is allocated (S53) to perform the PD function.

Third, FIG. 6 is a flowchart illustrating a memory allocation method according to another conventional PD function execution. As shown in FIG. 6, a PD layer is loaded from a system (S61) and a PD layer function is used for a PD layer function. Allocating some memory resources (S62) and receiving a PDPC request message from the radio resource control unit (S63) and allocating additional memory required for the PD function for the radio bearer, which is the corresponding resource transmission part (S64) It is made to perform (S65).

When allocating a memory resource among the PD functions corresponding to the second and third, the PD layer may fail to allocate the required memory resource when the PD layer receives a PD request message from the resource controller. Can be.

However, the first case may not be a problem. However, since the amount of memory used varies depending on whether the radio resource controller supports the function of the PD information, resource waste may increase.

However, the conventional apparatus operating as described above has a problem in that it cannot allocate a perfect memory resource because the PD layer cannot report to the radio resource controller when the memory resource fails.

The radio resource may include a packet for storing a SDU which is not received by the UE in the SNS reset element of memory and PD information for supporting compression context and reordering used for header compression. If it is secured in advance before receiving the PD request message from the control unit, there is a problem of memory waste of a wireless bearer that does not support both the memory corresponding to an unused wireless bearer and the wireless bearer in use.

Accordingly, the present invention has been made to solve the above problems, and after receiving a PD request message from the radio resource controller, configures an environment for allocating necessary resources and performing functions of the radio controller corresponding to the PD. The object of the present invention is to provide a method for processing an error of a PD to enable the report of the success or failure of the configuration to the radio control unit, thereby ensuring the operation of the PD layer, and thus to increase the call quality of the packet data service. have.

1 is a flowchart illustrating a method of performing a conventional PD function.

Figure 2 shows a message and parameters interacting between the conventional PD and the upper layer.

Figure 3 shows a typical PD information elements.

4 is a flowchart illustrating a memory allocation method according to a conventional PD function.

5 is a flowchart illustrating a memory allocation method according to a conventional PD function.

6 is a flowchart illustrating a memory allocation method according to a conventional PD function.

7 is a flowchart showing a method for processing a PD error according to the present invention.

Figure 8 shows the messages and parameters interacting between the invention PDPC and the upper layer.

The present invention for achieving the above object, after receiving the PD request message from the radio resource control unit configures the environment of the PD layer and outputs the result message and the cause message according to the request message to the radio resource control unit; Process; And a second process of performing the PD-specific function by exchanging data messages with upper and lower layers under the message control.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 7 is a flowchart illustrating a method for processing a PD error according to the present invention. As shown therein, after receiving a PD request message from a radio resource controller, an environment of a PD layer is configured (S71), and a result message according to the request message is shown. And a first step (S72) of outputting the cause message to the radio resource controller; The second step (S73) for performing the PD-specific function by exchanging data messages with the upper and lower layers under the message control, will be described in detail the operation and operation of the present invention configured as described above.

First, when the PD layer receives a PD request message of a corresponding radio bearer from a radio resource controller (RRC), it configures the PD layer configuration necessary to perform the PD function based on the contents of the parameters of the message. do.

8 is a diagram illustrating a message and a parameter interacting between a PDPC and a higher layer of the present invention. As shown in this figure, a message of a main relevant part is a PDPC of a radio bearer corresponding to the PD layer from the radio resource controller. In this case, the request message is received, and the PD layer does not allocate all the resources for the radio bearer upon system loading, but dynamically allocates the memory resources according to the required function.

That is, a result signal indicating whether the PD layer is successfully formed through the PD request message and a memory required for performing the PD function may fail, or there may be a problem in other configuration. The cause signal of the case is reported to the radio controller.

When the PD layer lacks resources, it reports to the radio control unit so as to request control or to mutually exchange with a core network (CN) and UE (USER EQUIPMENT) for resource allocation.

When a data message between the PD ssipi layer and IU dermoid (IU-UP) interchange or the PD ssipi layers and Al NC (RLC) data between a message is interchangeably configured environment for carrying out functional state, in the upper or lower Pass the received data to the lower or upper level.

At this time, if the PDCP PDU header and the header compression information of the PD information exist, the header compression and decompression function is performed.

Thereafter, when the PD layer receives a PD message from the radio resource controller, the PD layer releases the function of the PD layer for the corresponding radio bearer.

The error processing method of PDPC of the present invention is not limited to the above-described embodiment, and can be implemented in various modifications within the scope of the technical idea of the present invention.

As described in detail above, when the PD request message is received from the radio resource controller, the present invention configures an environment required for the allocation of the necessary resources and the function of the radio bearer corresponding to the PD and indicates whether the radio configuration is successful. By reporting to the resource control unit, it can efficiently use the system's memory resources and prevent and cope with unexpected system errors when the system configuration fails, thus ensuring stable PDC layer operation, which results in the call quality of packet data services. There is an effect to increase.

Claims (3)

Receiving a PD request message from the radio resource controller and configuring an environment of the PD layer and outputting a result message and a cause message according to the PD request message to the radio resource controller; And a second process of performing the PDPC-specific function by exchanging data messages with upper and lower layers under the message control. The radio resource controller of claim 1, wherein the first process comprises a result message indicating whether the configuration of the PD layer is successfully formed according to the PD request message, and when the memory required for the PD function fails to be secured. And requesting control or interchanging with the core network and the terminal for resource allocation to enable the memory to be secured successfully. The method of claim 1, wherein the PDPC layer, the lower layer, and the lower layer perform header compression and non-compression if the PDCP PDU header and the header compression information of the PD information exist when data messages are interchanged. Error handling method of PD C, characterized in that.