KR100918702B1 - Method for linking radion network, Apparatus for performing the method - Google Patents

Abstract

The present invention relates to a wireless network setting. The wireless network setting method according to the present invention comprises the steps of: (a) generating allocated frequency information, and transmitting the generated allocated frequency information to a wireless network control apparatus in a neighboring wireless network. (b) receiving the wireless network information corresponding to the allocated frequency information from the wireless network control device, and setting up a wireless link using the received wireless network information. do.

RNC, SRNC, DRNC

Description

Method for establishing a wireless network, and a device for performing the method {Method for linking radion network, Apparatus for performing the method}

The present invention relates to a wireless network setting in a mobile communication network, and more particularly, to a method and apparatus for establishing a wireless link between a wireless network controller (hereinafter referred to as 'RNC').

Wideband Code Division Multiple Access (WCDMA) communication method is an asynchronous wireless protocol recommended by International Mobile Telecommunication (IMT) -2000, which uses a spread spectrum method, and is suitable for a large amount of data transmission and has a very high call quality. This WCDMA system adopts 32 Kbps Adaptive Differential Pulse Code Modulation (ADPCM) for voice coding, and supports high mobility enough to make a call even if the user moves at a speed of about 100 km per hour.

Meanwhile, as an element for supporting the WCDMA communication scheme, there is a Radio Access Network (RAN) including a base station and a wireless network control apparatus.

The radio access network functions to control a radio transceiver subsystem (RTS), and a radio network controller (RNC) functions to manage radio resources of an IMT-2000 system and to access a base station in a wireless subscriber network. Manages and manages the interface between the wireless network control device and other network elements.

When the user is moving while the multimedia service is provided from the WCDMA system to the mobile communication terminal, the user can move to another base station or another sector area within the base station. At this time, the mobile communication terminal performs a handover. Handover refers to a technology for establishing a call path between a mobile communication terminal and a base station so that the call can be continuously maintained even if the mobile communication terminal leaves a sector service area within a base station currently being serviced.

When such a handover occurs, an operation for establishing a new link is performed between the original wireless network controller and the wireless network controller after the handover, and from this point of view, the serving wireless network controller (Serving RNC) is used. SRNC), the radio network controller after the handover is also referred to as a drift radio network controller (DRNC).

Meanwhile, according to the related art, since the SRNC cannot know how the neighboring radio network is configured in the DRNC region, when the DRNC transmits a radio link establishment response message to the SRNC, information about the neighboring radio network is transmitted. As an example of such a radio link setup response message, it is defined as a 'Radio Link Setup Response' message in the 3GPP TS25.423 9.2.1.41A standard.

At this time, even if an error occurs in a part of the radio link establishment response message, the radio link establishment response message itself becomes invalid due to a decoding error. Therefore, the size of the radio link establishment response message may be minimized in terms of transmission error probability. There is a need to reduce the size of the radio link in terms of usage.

In addition, a WCDMA frequency division duplex (FDD) wireless network control device can transmit and receive signals by allocating up to four frequency domains (Four Frequency Assignment (FA) 1). The more frequently used allocated frequency FAs, the more information on neighboring radio networks should be included for each assigned frequency FA. Therefore, there is a problem that the amount of information to be transmitted eventually increases, and accordingly, the size of the radio link establishment response message becomes rather large.

The present invention provides a method and apparatus for establishing a wireless network to reduce the size of messages transmitted and received when establishing a wireless link between SRNC and DRNC in order to reduce the probability of reception errors in the mobile communication network environment and to relatively reduce the usage of the wireless link. The purpose.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the wireless network setting method according to the present invention comprises the steps of (a) generating the assigned frequency information, and (b) transmitting the generated assigned frequency information to a wireless network control device in a neighboring wireless network And (c) receiving wireless network information corresponding to the allocated frequency information from the wireless network control device and setting up a wireless link using the received wireless network information.

In addition, in order to achieve the above object, the wireless network setting method according to the present invention comprises the steps of (a) receiving the allocated frequency information from the wireless network control apparatus in the home wireless network, and the radio corresponding to the received allocated frequency information (B) collecting network information, transmitting (c) the collected wireless network information to the wireless network controller, and (d) establishing a wireless link based on the transmitted wireless network information. Include.

In addition, in order to achieve the above object, the apparatus for controlling a wireless network according to the present invention transmits a control unit for providing allocation frequency information, a message generating unit for generating a message including the provided allocation frequency information, and the generated message. And a message transmitting / receiving unit for receiving wireless network information corresponding to the allocated frequency information in the neighboring wireless network, wherein the control unit sets up a wireless link using the received wireless network information.

In addition, to achieve the above object, the apparatus for controlling a wireless network according to the present invention includes a message transmitting and receiving unit for receiving allocation frequency information, a controller for collecting radio network information corresponding to the allocated allocation frequency information, and the collected radio. And a message generating unit for generating a message including network information, wherein the message transmitting and receiving unit transmits a message generated by the message generating unit, and a wireless link is established based on the collected wireless network information.

According to the wireless network setup method according to the present invention, by reducing the size of messages transmitted and received between the SRNC and DRNC when setting up the radio link, the probability of reception error is reduced, and the resource usage of the radio link is relatively reduced, thereby improving system performance. .

Specific details of embodiments of the present invention are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

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

1 is a view showing a wireless network system according to an embodiment of the present invention.

Referring to FIG. 1, a wireless network system according to the present invention includes a home wireless network 110, an SRNC 112, a neighbor wireless network 120, a DRNC 122, and a user terminal 130.

At this time, the SRNC 112 is a wireless network control device for managing the area of the home wireless network 110 is located before the user terminal 130 is handed over, DRNC 122 is a user terminal 130 is a hand It means a wireless network control device that manages the area of the neighboring wireless network 120 located after the over.

When a handover occurs in which the user terminal 130 moves from a current cell to another neighboring cell in a call connection maintenance state, a cell before and after the handover is generally located in an area managed by the same radio network controller. If there is, the user terminal 130 can receive information about the neighboring cell from the wireless network control device managing itself while performing a handover, so that seamless communication is possible.

However, when the cell before the handover by the user terminal 130 and the cell after it exist in an area managed by different wireless network control devices, that is, as shown in FIG. 1, the user terminal 130 before handover Is managed by the SRNC 112 belonging to the home wireless network 110, and after the handover, by the DRNC 122 belonging to the neighboring wireless network 120, the SRNC 112 is a neighboring wireless network ( Since information about 120 is unknown, in the present invention, the SRNC 112 and the DRNC 122 have a configuration in which information about the neighboring radio network 120 is transmitted to the SRNC 112 in the process of establishing a radio link. do.

More specifically, when handover is performed by the user terminal 130 from the home wireless network 110 to the neighbor wireless network 120, a radio link according to the handover between the SRNC 112 and the DRNC 122. A call processing operation is performed to set the time, and at this time, the SRNC 112 causes the DRNC 122 to transmit allocation frequency information indicating which allocation frequency FA is currently used by the user terminal 130. do.

Then, the DRNC 122 provides the SRNC 112 with information about the neighboring radio network 120 corresponding to the allocated frequency information transmitted by the SRNC 112.

For example, when the SRNC 112 transmits the allocated frequency FA1 to the DRNC 122 as the allocated frequency information, the DRNC 122 may neighbor neighbor network information corresponding to all allocated frequencies, that is, FA1, FA2, F3, and F4. Is not transmitting to the SRNC 112, but only the neighboring radio network information corresponding to the assigned frequency FA1 to the SRNC (112).

In the conventional SRNC, since it receives neighboring radio network information about all assigned frequencies in the DRNC area unnecessarily, it includes a lot of unnecessary information, which is wasteful in terms of resources, and SRNC is not used in terms of transmission efficiency. In case of an error in neighboring radio network information regarding unnecessary allocated frequency, there is a problem that the entire neighbor radio network information must be received again due to this error.

However, in the present invention, as shown in FIG. 1, the SRNC 112 provides the allocated frequency information currently used by the DRNC 122 to receive only the neighboring radio network information corresponding to the allocated frequency information. It is possible to increase transmission efficiency while saving resources when setting up a radio link due to overload.

FIG. 2 is a diagram illustrating a configuration of an apparatus for controlling a wireless network according to an embodiment of the present invention, and means the SRNC 112 or the DRNC 122 illustrated in FIG. 1.

Referring to FIG. 2, the apparatus 200 for controlling a wireless network according to the present invention includes a message transmitting and receiving unit 210, a message analyzing unit 220, a controller 230, a wireless network information storing unit 240, and a message generating unit ( 250).

The message transceiver 210 transmits or receives a message for a wireless link to another wireless network control device existing in a neighboring wireless network.

The message analyzer 220 analyzes the received message and extracts information on an allocated frequency used by the other wireless network controller.

The wireless network information storage unit 230 stores information on the wireless network, and the controller 230 extracts the wireless network information stored in the wireless network information storage unit 230 and provides the message to the message generator 250. .

The message generator 250 generates a message including the extracted wireless network information and provides the message to the message transceiver 210.

First, a case in which the radio network control apparatus 200 shown in FIG. 2 operates as the SRNC 112 to set up a radio link with the DRNC 122 will be described.

The controller 230 extracts the allocated frequency information used by the wireless network information storage unit 240 and provides the extracted allocated frequency information to the message generator 250.

Then, the message generator 250 generates a radio link establishment request message for establishing a radio link with the DRNC 122, and the generated request message includes the extracted allocation frequency information. The message generator 250 provides the generated request message to the message transceiver 210, and the message transceiver 210 transmits the generated radio link setup request message to the DRNC 122.

Then, when the message transceiver 210 receives the response message for the radio link establishment request message from the DRNC 122, the message analyzer 220 receives the radio network information of the DRNC 122 area from the received message. Extract it and transfer it to the controller 230. In this case, the wireless network information transmitted to the controller 230 includes wireless network information in a neighboring wireless network corresponding to an allocated frequency used in the SRNC 112 region. The controller 230 may store the transmitted wireless network information in the wireless network information storage unit 240.

On the other hand, when the wireless network control apparatus 200 operates as the DRNC 122, the message transmitting and receiving unit 210 in the home wireless network 110 from the SRNC 112 existing in the home wireless network 110 Receive a radio link establishment request message including the assigned frequency information being used.

Then, the message analyzer 220 analyzes the received radio link establishment request message and extracts information on the allocated frequency used in the SRNC 112 region.

The controller 230 extracts wireless network information on the allocated frequency used in the SRNC 112 region from the wireless network information storage unit 230 based on the extracted information, and provides the extracted message to the message generator 250. The message generator 250 generates a response message for the radio link establishment request message, includes the extracted wireless network information in the generated response message, and provides the message to the message transceiver 210, and the message transceiver 210. Will forward the provided message to SRNC 112.

On the other hand, as an example of the information on the neighboring wireless network in the present invention may refer to "Neighboring UMTS Cell Information" in the 3PP TS25.423 9.2.1.41A standard.

3 is a flowchart illustrating a method for establishing a wireless network according to an embodiment of the present invention, and more specifically, illustrates a message transmission / reception process for establishing a wireless link.

First, the DRNC 122 receives a radio link setup request message from the SRNC 112 (S310). In this case, the detailed structure of the radio link establishment request message may refer to the 3PP TS25.423 standard.

Referring to the specification, the radio link establishment request message includes a "RL Information" field 410, and the "RL Information" field 410 includes 16-bit "C-ID" information 420. The "C-ID" information 420 includes information on the allocated frequency used in the SRNC 112 region. According to the standard, the "C-ID" means identification information of one cell in one Radio Network Sub-systems (RNS). A radio link establishment request message having such a structure is shown in FIG.

Accordingly, the DRNC 122 checks whether the allocated frequency information in the SRNC 112 region exists in the "C-ID" information 420 (S320), and if the "C-ID" information 420 If the allocated frequency information is present), the wireless network information of the neighboring wireless network 120 related to the allocated frequency information is collected (S330). Otherwise, the neighboring wireless network related to all frequency information as in all conventional methods is collected. The wireless network information of the 120 is collected (S360).

Then, the DRNC 122 generates a radio link setup response message including radio network information collected in step S330 or S360 (S340). At this time, a more detailed structure of the radio link establishment response message may similarly refer to 3PP TS25.423 standard, and function as a response message to the radio link establishment request message.

More specifically, referring to the specification, the radio link establishment response message includes a "RL Information Response" field 510, and the "RL Information Response" field 510 again includes "Neighboring UMTS Cell Information" information ( 520), and according to the result of the step S320, the " Neighboring UMTS Cell Information " Corresponding wireless network information is carried. A radio link establishment response message having such a structure is shown in FIG.

When the radio link setup response message is generated in step S340, the DRNC 122 transmits the generated radio link setup response message to the SRNC 112 (S350).

Therefore, if the radio link establishment request message received from the SRNC 112 in step S320 includes allocation frequency information in the SRNC 112 region, the radio link establishment response message transmitted to the SRNC 112 in step S350 is included. The radio network information about the allotted frequency is not carried, but only the radio network information about the corresponding allotted frequency, so that the length of the radio link establishment response message is shortened. As a result, it is possible to save resources for establishing a radio link and to increase transmission efficiency due to a decrease in message length.

On the other hand, the SRNC 112 as a method for indicating the assigned frequency in the C-ID information 420 shown in FIG. Can be used.

That is, when the specific 2 bits are displayed as '00', the first allocated frequency FA1 is displayed, when '01' is displayed, the second allocated frequency FA2 is displayed; If it is indicated by 11 'can be defined to represent the fourth assigned frequency (FA4).

As another embodiment, a case in which a specific 3 bit is displayed may be considered. In this case, when the specific 3 bit is displayed as '000', an operation according to the present invention is deactivated (that is, step S320 in FIG. 3). May indicate that there is no allocated frequency information), if it is indicated as '001', the first allocated frequency FA1 is indicated, if it is indicated as '010', the second assigned frequency FA2 is indicated; If the assigned frequency FA3 is represented as '100', it may be defined as indicating the fourth allocated frequency FA4.

That is, the method for displaying the allocated frequency in the C-ID information 420 may be indicated by a predetermined appointment between the SRNC 112 and the DRNC 122, and within this range, the design can be easily changed by those skilled in the art. Is self-explanatory.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

1 is a view showing a wireless network system according to an embodiment of the present invention.

2 is a diagram showing the configuration of a wireless network control apparatus according to an embodiment of the present invention.

3 is a flowchart illustrating a wireless network setting method according to an embodiment of the present invention.

4 is a diagram illustrating a structure of a radio link establishment request message for establishing a radio network according to an embodiment of the present invention.

5 is a diagram illustrating a structure of a radio link establishment response mesh for establishing a radio network according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

110: home wireless network

120: neighbor wireless network

112: SRNC

122: DRNC

130: user terminal

Claims (11)

A method for setting a wireless network in a home wireless network controller for managing an area of a home wireless network, (A) generating allocated frequency information used in the home wireless network; (B) transmitting the generated allocated frequency information to a neighboring wireless network control device in a neighboring wireless network; (C) receiving wireless network information corresponding to the allocated frequency information from the neighboring wireless network control device; And And (d) establishing a wireless link using the received wireless network information. The method of claim 1, The step (b) includes the step of transmitting the request message to the neighboring radio network controller by including the generated allocation frequency information in a request message for requesting the establishment of a radio link with the neighboring radio network controller, The step (c) includes the step of receiving the response message from the neighboring wireless network control apparatus by including the wireless network information in a response message corresponding to the request message. The method of claim 2, The request message and the response message are a radio link establishment request message and a radio link establishment response message defined in 3GPP TS25.423 standard. The method of claim 3, The allocated frequency information is displayed in the "C-ID" information of the "RL Information" field present in the radio link establishment request message. The method of claim 3, The wireless network information is displayed in the "Neighboring UMTS Cell Information" information of the "RL Information Response" field present in the radio link establishment response message. A method of setting up a wireless network in a neighboring wireless network controller that manages an area of a neighboring wireless network, (A) receiving allocation frequency information used in the home wireless network from a home wireless network control apparatus in a home wireless network; (B) collecting wireless network information corresponding to the received allocated frequency information; (C) transmitting the collected wireless network information to the home wireless network control device; And And (d) establishing a wireless link based on the transmitted wireless network information. The method of claim 6, In step (a), Receiving the request message from the home wireless network control apparatus by including the allocated frequency information in a request message requesting wireless link establishment; In step (c), And including the wireless network information in a response message corresponding to the request message and transmitting the information to the home wireless network control device. A control unit for providing allocated frequency information used in a home wireless network; A message generator for generating a message including the provided allocated frequency information; And A message transmitting / receiving unit which transmits the generated message and receives wireless network information corresponding to the allocated frequency information in a neighboring wireless network, And the control unit sets up a wireless link using the received wireless network information. The method of claim 8, The message generated by the message generator is a request message for establishing a radio link, and the wireless network information is included in a response message corresponding to the request message and is received by the message transceiver. Message transmitting and receiving unit for receiving the allocated frequency information used in the home wireless network; A control unit collecting wireless network information corresponding to the received allocated frequency information; And A message generating unit generating a message including the collected wireless network information; The message transmitting and receiving unit transmits a message generated by the message generating unit, and a wireless link is established based on the collected wireless network information, neighboring wireless network control device. The method of claim 10, The allocated frequency information is included in a request message for establishing a radio link and received by the message transceiver; And the message generated by the message generator is a response message corresponding to the request message.

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