KR100350379B1 - Method for controlling interface set-up of transport path in radio access network - Google Patents

Abstract

The present invention uses a non-switched algorithm of ATM / AAL2 signaling and a new address mapping technique in a 3rd Generation asynchronous base-control station system to enable a flexible path connection. The present invention relates to a method for controlling a transport path connection at RNC, wherein the RNC sets a virtual channel identifier (VCI) and a channel element identifier (CID) when an ATM link connection is set up from an upper block, and sets the ATM link. Sends a connection request message to the logical node, checks whether a connection establishment confirmation message is received from the logical node in a standby state, and as a result, when a connection establishment confirmation message is received, selector and distribution module (SDM) information and VCI / CID are received. After creating mapping table, send connection setup request confirmation message to upper block. In addition, when the logical node receives the connection establishment request message transmitted from the RNC, the logical node allocates a VCI / CID, creates a channel card information and a VCI / CID mapping table, and transmits an ATM link connection confirmation message to the RNC. Sends a connection establishment indication message to the block.

Description

Method for controlling interface set-up of transport path in radio access network}

The present invention relates to transport path connection control in a radio access network (hereinafter abbreviated as "RAN"), particularly ATM / AAL2 in a 3rd generation asynchronous base-control station system. The present invention relates to a method for controlling transport path connection in a RAN that enables flexible path connection by using a non-switched algorithm of signaling and a new address mapping technique.

More specifically, the transport path connection is established in a more flexible manner than the method of determining the transport path at system set-up by applying fixed path allocation by applying ATM / AAL2 technique to the RAN. Thus, the present invention relates to a transport path connection control method in a RAN that enables path connection to any node naturally.

In the conventional third generation asynchronous mobile communication system, the connection of the RAN system means the use of a fixed path between the base station and the control station.

The information of the internal connection of any subsystem is transmitted from the base station to the control station to the connection of other subsystems, so that the connection information of the entire system must be unified.

In other words, even though the base station and the control station use different resources, the conventional RAN system connection (transport path connection) must use the same connection information as the same resource, and this information must continue to be transmitted.

This is because all connections between the base station and the control station must be promised to be connected by a full mash, and thus, there is a disadvantage in that address allocation is difficult when expanding a system or interworking with another system.

Accordingly, the present invention has been proposed to solve various problems occurring when establishing a transport path connection in the conventional RAN system as described above.

An object of the present invention is to enable a flexible path connection by using a non-switched algorithm of ATM / AAL2 signaling and a new address mapping technique in a 3rd generation asynchronous base-control station system. The purpose of the present invention is to provide a transport routing control method in a RAN.

More specifically, the transport path connection is established in a more flexible manner than the method of determining the transport path at system set-up by applying fixed path allocation by applying ATM / AAL2 technique to the RAN. Therefore, the present invention provides a method for controlling transport path connection establishment in a RAN that enables path connection to any node naturally.

Transport path connection control method in the RAN according to the present invention for achieving the above object,

Independently establishes the connection between the Node-B system and the RNC system, and the connection between the Node-B and the RNC allocates a transport path using AAL2 signaling and binds each resource allocation factor to each system. Let's do it.

Using this allocated transport id, traffic between Node-B and RNC is forwarded, and it is mapped to internal resource elements that are already allocated in each subsystem and routed to the corresponding hardware.

In addition, global network matching can be configured by flexibly allocating resources between node-B and RNC and independent of each system resource connection, ensuring address independence even when different types of nodes and RNC match. Be sure to It also establishes a connection using AAL2 signaling to ensure useful network configuration.

1 is a block diagram showing a system configuration of a radio access network (RAN) to which the present invention is applied;

2 is a diagram illustrating an inter-block message flow for establishing a transport connection in the present invention,

FIG. 3 is a flowchart illustrating a method for controlling transport path connection establishment in a RAN according to the present invention, FIG. 3A is a flowchart illustrating an outbound connection establishment process, and FIG. 3B is a flowchart illustrating a receiving side connection establishment process.

4 is a diagram illustrating a mapping table structure for establishing a transport path connection in the present invention.

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

100 ..... Logical Node

110 ..... Channel Card Module

120 ..... Link Interface Unit

130 ..... Control Processor

200 ..... RNC

210 ..... link matching module

220 ..... ATM Matching Subsystem

230 ..... Selectors and Distribution Modules

240 ..... call processing unit

Hereinafter, a preferred embodiment of the present invention according to the technical spirit as described above will be described in detail with reference to the accompanying drawings.

First of all, the present invention ensures independent utilization of a subsystem by establishing a connection between a node-b and an RNC applying ATM / AAL2 signaling in a RAN of a third generation asynchronous mobile communication system.

For this purpose, it is configured in hardware such as Node-b, Link Interface Unit (LIU), and LIM-B of RNC and uses CHC and SDM as resources.

As the call progress procedure is performed, the RNC (or Node-B) starts by transmitting a Establish request message, which is an ATM VCC connection request.

Node-B (or RNC) receiving the message establishes AAL2 path, allocates resources such as CID, creates outgoing protocol object, assigns SAID to this object, and signaling procedure for establishing connection. Perform Here, the connection setup request message is sent back to the RNC (Node-B) using the assigned SAID and CID as parameters.

The receiver of the connection establishment request message checks the delivered CID and AAL2 paths and allocates resources if the path can be established. AAL2 setup is complete when a connection establishment confirmation message arrives at the node that initiated the connection, indicating that the connection has been successfully established.

After the establishment of the connection, the connection establishment indication is transmitted to each upper layer, and the resources allocated to the mapping table for mapping each internal resource configuration element and the ATM transport path established by AAL2 signaling are stored.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the concept of the present invention.

1 is a block diagram illustrating a system configuration of a radio access network (RAN) in a third generation asynchronous mobile communication system to which the present invention is applied.

Here, reference numeral 100 denotes a logical node (Node-B) that is responsible for radio transmission / reception, and reference numeral 200 denotes a radio network controller (hereinafter referred to as "RNC") which is a subsystem that controls radio resources. Abbreviated).

The logical node 100 controls the overall functions of the channel card module 110 including a plurality of channel cards, a link interface unit 120 which is an E1 link matching unit, and the logical node 100. It includes a control processor (node-B Control Processor).

Also, the RNC 200 may perform a matching function with the logical node 100, a link matching module 210 performing a link matching function in the RNC 200, and an ATM matching subsystem performing an ATM matching function ( ATM Interface System (220), Selector Distribution Module (230) that performs vocoding functions (230), performs overall control functions related to call processing, SS No.7 protocol processing and core network (Core) Network) and a call processing unit 240 to perform an interface function.

In the above, the call processing unit 240 is an access control processor (Access Control Processor) for performing the overall control function associated with the call processing function (241), SS No. 7 protocol processing and the access number in charge of the interface with the core network. 7 processors (Access No. 7 Processor) 242.

In the RAN system to which the present invention configured as described above is applied, a block message flow for establishing a connection will be described in detail with reference to FIG. 2.

First, in step S1, when a request for establishing a connection between the logical node 100 and the RNC 200 is established from an upper call processing block (Establish request), in step S2, resource allocation is performed by the link matching module 210 in the RNC 200. The process then transfers the allocated resource to the link interface unit 120 in the logical node 100 (Establish_REQ).

The link interface unit 120 transmits the transmitted connection setting data to the control processor 130, and the control processor 130 performs the request procedure in step S3 and, if accepting, establishes the connection to the upper block of the receiving side. Establish indication.

In step S4, the receiving side sends a connection establishment confirmation message to the calling party as a response message for accepting the connection, and in step S5, the calling party sends the received connection establishment confirmation message to an upper block to complete the procedure for connection establishment.

3 is a flowchart illustrating a method for controlling transport path connection establishment in a RAN according to the present invention.

First, FIG. 3A is a flowchart illustrating an originating connection establishment process, in which an ATM link connection establishment is requested from an upper block in step S101.

If the ATM link connection setting is requested as described above, a virtual channel identifier (VCI) and a channel element identifier (CID) are set in step S102.

Here, the VCI / CID allocation is set as x, y, ..., s as shown in the right side of FIG.

Thereafter, an ATM link connection request message is sent to the logical node 100 in step S103.

Thereafter, in step S104, it is checked whether a connection establishment confirmation message is received from the logical node 100 in a standby state, and as a result, if a connection establishment confirmation message is not transmitted from the logical node 100, the standby state which is the current state is maintained. do.

On the contrary, when the connection establishment confirmation message is received from the logical node 100, the SDM information and the VCI / CID mapping table are created in step S105.

As shown in the right side of FIG. 4, the VCI / CID mapping table maps VCI of the selector and the distribution module to i when VCI / CID is x, and maps the VCI of i to the selector and the distribution module when VCI / CID is y. VCI maps to j, and when the VCI / CID is s, VCI / CID mapping table is created by mapping VCI of the selector and distributed module to m.

In step S106, the connection establishment request confirmation message is transmitted to the upper block.

On the other hand, the receiving side receiving the connection establishment request message transmitted from the originating side (RNC), when receiving the ATM link connection request in step S201, as shown in Figure 3b, allocates the VCI / CID in step S202.

Here, the VCI / CID is allocated to x, y, ..., s similarly to the RNC 200.

Next, in step S203, the channel card information and the VCI / CID mapping table are created.

As shown in the left side of FIG. 4, the VCI / CID mapping table maps the VCI of the channel card to a when VCI / CID is x, and the VCI of the channel card to b when the VCI / CID is y. If the VCI / CID is s, the VCI / CID mapping table is created in such a manner that the VCI of the channel card is mapped to n.

That is, the VCI / CID value is set by both the logical node and the RNC, and the information values used in each subsystem are mapped and used for each system.

Thereafter, in step S204, an ATM link connection confirmation message is transmitted to the RNC 200, and in step S205, a connection establishment instruction message is sent to an upper block, and connection establishment is completed.

According to the above-described "transport path connection establishment control method in a radio access network" according to the present invention, by establishing a connection in the end-to-end connection method between subsystems using AAL2 signaling, This has the advantage of ensuring independent resource utilization of the system.

In addition, there is an advantage that the connection between the configured ATM transport path, the logical node, and the RNC resource allocation elements can be connected.

In addition, the logical node (node-B) resource and RNC resource configuration can be freely set by the above-described advantages, and a plurality of users can transmit data to a single ATM cell, thereby distinguishing users by putting a CID factor in the cell. Therefore, it is possible to transmit a large number of user data at one time, thereby increasing the transmission efficiency.

In addition, by setting up a transport path using a signaling technique, matching between other types of systems is much easier.

Claims (5)

In a method for establishing a connection between an RNC and a logical node in a RAN of a third generation asynchronous mobile communication system, The RNC side, if requested to establish an ATM link connection from an upper block, sets a virtual channel identifier (VCI) and a channel element identifier (CID), and sets the ATM link after setting the VCI / CID. Sending a connection request message to the logical node, checking whether a connection establishment confirmation message is received from the logical node in a standby state, and when a connection establishment confirmation message is received as a result, selector and distributed module (SDM) information and Create a VCI / CID mapping table and send a connection setup request confirmation message to the upper block to control the connection setup. When the logical node receives the connection establishment request message transmitted from the RNC, allocating a VCI / CID, creating a channel card information and a VCI / CID mapping table, and sending an ATM link connection confirmation message to the RNC. Transmitting and transmitting a connection establishment indication message to an upper block to complete connection establishment. The method of claim 1, wherein the VCI / CID value in the RNC is set as x, y, ..., s. The VCI / CID mapping of the RNC according to claim 1, wherein the VCI of the selector and the distribution module is mapped to i when the VCI / CID is x, and the VCI of the selector and the distribution module when the VCI / CID is y. Is mapped to j, and if the VCI / CID is s, the VCI of the selector and the distribution module is mapped to m to create a VCI / CID mapping table. The method according to claim 1, wherein the VCI / CID value in the logical node is allocated to x, y, ..., s in the same way as the RNC. The VCI / CID mapping of the logical node according to claim 1, wherein the VCI of the channel card is mapped to a when the VCI / CID is x, and the VCI of the channel card is b when the VCI / CID is y. Mapping, and when the VCI / CID is s, creating a VCI / CID mapping table by mapping the VCI of the channel card to n.