KR20080052156A - Radio resource management apparatus and method for mobile communication system - Google Patents

Abstract

An apparatus and a method for managing a radio resource in a mobile communication system are provided to enhance service quality and efficiency via efficient radio resource assignment and load control of the mobile communication system, and to be applied to a radio resource management function of a 3G LTE(Long Term Evolution) base station. An apparatus for managing a radio resource includes a radio connection control block(100), a handover control block(200), an operating and preserving control block(300) and a radio resource control block(400). The radio connection control block processes a basic call in a radio section via control of a radio signal protocol. The handover control block controls a handover call. The operating and preserving control block is connected to the radio resource control block for processing the basic or handover call. The radio resource control block includes a call acceptance controller(410) which determines whether to accept or reject a call upon the basic or handover call attempt, and a load controller(420) which assigns the radio resource, receives collected load related information and determines whether to perform overload control. The load controller includes an overload controller(421), a load monitoring unit(422), a resource assigning unit(423) and a resource state database(424). The overload controller performs overload control in case the amount of collected load is over a threshold. The load monitoring unit receives collected load information and turns over the load information to the overload controller. The resource assigning unit assigns the radio resource and manages remaining resources. The resource state database stores and manages the state of the resources and the system.

Description

Radio resource management apparatus and method of mobile communication system {RADIO RESOURCE MANAGEMENT APPARATUS AND METHOD FOR MOBILE COMMUNICATION SYSTEM}

1 is a block diagram of a radio resource management apparatus according to an embodiment of the present invention;

2 is a flowchart illustrating a resource allocation procedure when a call processing request is made by the radio resource management apparatus shown in FIG. 1;

3 is a flowchart for explaining a resource allocation procedure when a handover call processing request is made by the radio resource management apparatus shown in FIG. 1;

4 is a flowchart for explaining a load control procedure in a wireless environment by the apparatus for managing a radio resource shown in FIG. 1;

5 is a flowchart illustrating a load control procedure of the system by the radio resource management apparatus shown in FIG. 1.

The present invention relates to radio resource management of a mobile communication system, and more particularly, to an apparatus and method for managing radio resources of a base station in a mobile communication system.

The 3rd Generation Partnership Project (3GPP) mobile communication system is expected to be competitive in the coming years through the expansion of HSDPA's downlink capacity and HSDPA's uplink capacity. In order to provide a competitive mobile communication system of the future, a new wireless access technology is required.

Accordingly, 3GPP began research on RAN Long Term Evolution (LTE) applying a new radio access technology, which has become more meaningful due to the competitive progress of 3GPP radio access technology.

In order for the current 3GPP-related technology to remain competitive in the future, 3GPP radio access technology needs to be considered more importantly. Key parts of this 3GPP LTE include reduced latency, higher user data rates, improved system capacity and coverage, and reduced burden on network operators. This is a major issue. In order to achieve these, the evolution of the access system along with the structure of the wireless network is essential.

The 3GPP LTE base station system is a NodeB function of the existing 3GPP R6 and the existing RNC (Radio Network) to simplify the number and interface of nodes constituting the system to satisfy the low latency required by 3G evolution LTE Some functions of the controller were integrated / divided to realize through evolved-node B (eNodeB), and some functions of 3GPP RNC and SGSN / GGSN and some functions were added to configure aGW (Access Gateway). In addition, 3G Evolution is considering not only interworking with the 3GPP family system, but also interworking and handover with the Non-3GPP family such as WLAN, and the 3G evolution terminal includes a function supporting simultaneous WLAN and 3G evolution system. do.

Currently, 3G Evolution LTE base station system is still in progress, so there is no stable standard and companies in each country are developing 3G Evolution system.

In the past, there was a resource management function used for existing mobile communication such as WCDMA or HSDPA, but there is no resource management suitable for 3G evolution.

In particular, the present invention is advantageous in application to the radio resource management function of the 3G evolution LTE base station, but is not limited to such a specific mobile communication system can be applied to any mobile communication system requiring a radio resource management function.

The present invention has been proposed to solve such a research problem, and its purpose is to increase service quality and efficiency through efficient radio resource allocation and load control of a mobile communication system.

In one aspect of the present invention for realizing such an object, an apparatus for managing a radio resource of a mobile communication system includes a radio connection control block for handling basic call processing in a radio section through radio signal protocol control, and a handover call. A handover control block and a radio resource control block for managing a radio resource for processing a basic call or a handover call, the radio resource control block, allocates and collects radio resources when attempting the basic call and handover call The load control unit determines whether to perform overload control based on the received load-related information, and the lock control unit determines whether to accept or reject a basic call or a handover call according to whether bandwidth of the radio resource allocated by the load control unit is available and whether real-time traffic is available. Include.

According to another aspect of the present invention, a radio resource management method of a mobile communication system includes a radio connection control block for handling basic call processing in a radio section through radio signal protocol control, a handover control block for controlling a handover call, and a basic A load control unit that determines whether to perform overload control by allocating radio resources and receiving collected load-related information when attempting a call or handover call. A radio resource management method of a mobile communication system including a rock lock control unit for determining acceptance or rejection of a handover call, wherein the radio connection control block or the handover control block receives a call request from a terminal and establishes a connection between radio sections; Requesting the lake rock to the lake rock control unit, and the lake rock control unit to request the lake rock Converts the message into an internal message and delivers it to the load control unit. The load control unit checks the status of the existing remaining resources and informs the lake lock controller of the available bandwidth information, and the lake lock controller evaluates the bandwidth indicated by the load controller. Accepting or rejecting a basic call or a handover call according to whether bandwidth is available and real-time traffic.

As another aspect of the present invention, a radio resource management method of a mobile communication system includes a radio connection control block for basic call processing in a radio section through radio signal protocol control, and a handover control block for controlling a handover call; When a basic call or a handover call is attempted, the load control unit and the load control unit determine whether to perform overload control by allocating radio resources and receiving collected load-related information. A radio resource management method of a mobile communication system including a lock control unit for determining whether to accept or reject a call or a handover call, wherein the load information measured by the terminal in a wireless environment or the load information measured by the system for operation maintenance is locked. And transmitting the load information to the load control unit. Comprises the steps of sending a load request message to control the overload control in not less than a certain threshold value to control a review of sure that the high load above a certain threshold.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, in the drawings, if it is determined that the gist of the present invention may be obscured, the part is omitted.

1 is a block diagram of a radio resource management apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the apparatus for managing a radio resource of the present invention includes a radio connection control block 100 for handling basic call processing in a radio section through radio signal protocol control, and a handover control block for controlling a handover call ( 200 and the operation preservation control block 300 are connected to the radio resource control block 400 for the basic call and handover call processing.

The radio resource control block 400 performs overload control by actually assigning a radio resource with the rock lock control unit 410 which determines whether to accept a call or not when a basic call and a handover call attempt are made. The load control unit 420 for determining whether to perform is interconnected therein.

The load control unit 420 measures the overload control unit 421 to perform overload control when the amount of the collected load exceeds a predetermined threshold value, and receives the collected load information and hands it to the overload control unit 421. A load monitoring unit 422, a resource allocating unit 423 which performs a function of actually allocating radio resources and manages remaining resources, and a resource state DB 424 for storing and managing states of resources and systems. It is composed.

In order to perform the load control function, various parameters are required, and it is important to maintain these values statically and dynamically, and to maintain values that optimize the performance of the system. To this end, a technique is needed to derive appropriate load control parameters and apply appropriate values according to the situation. The overload control unit 421 performs the actual load control so that the quality of service does not fall on real-time traffic and non-real-time traffic based on the value obtained through the load monitoring unit 422. That is, the overload control unit 421 receives the load-related values transmitted from the load monitoring unit 422 to perform the load control if the load is greater than the threshold value and to continuously monitor the system if it is normal.

Overload at the air interface occurs due to increased interference. Therefore, the overload control algorithm must continuously monitor the state of the network to control the overload situation. This monitoring by the load monitoring unit 422 is based on network measurements such as downlink transmission power, uplink cell load factor, and the like. These values are used several times to prevent false overload control detection, in which the overload control technique is triggered even though there is no actual overload in the radio section, and to prevent overload detection where the overload control technique does not start despite the actual overload in the radio segment. It is necessary to measure and take the average value. That is, the load monitoring unit 422 receives the measurement values such as the load and signal strength measurement value of the wireless section transmitted from the wireless connection control block 100 and the load of the system transmitted from the operation maintenance control block 300 and the overload control unit ( 421) to manage the resources.

The resource allocating unit 423 allocates the actual resource to the call through association with the lake rock control unit 410. The load control unit 420 keeps the occupancy of the resource always up to date, and the resource allocating unit 423 allocates the resource request amount within a range not exceeding the remaining resource amount if there are available resources. That is, the resource allocating unit 423 maintains and manages the available resources for allocating resources when there is a new call request or handover call attempt through the interface with the lake lock control unit 410.

The resource state DB 424 performs maintenance on the total amount of resources, the amount of resources in use, and the amount of available resources for each cell of each base station. That is, the resource state DB 424 maintains the resource state of the entire base station, maintains the resource state from the creation of the new call to the expiration of the call including the handover call, and manages the resource state of the system.

2 is a flowchart illustrating a resource allocation procedure when a call processing request is made by the radio resource management apparatus shown in FIG. 1.

First, the radio connection control block 100 receives the call request request from the terminal and sets the call type, class type, and QoS parameters to the rock lock control unit 410 of the radio resource control block 400 to establish a connection between radio sections. As requested by the lake (S501).

The lock control unit 410 receives this message, converts it into an internal message, and transmits it to the load control unit 420 (S503). The load control unit 420 receives this and checks the state of the existing residual resource (S505). (Bandwidth) informs the lake lock control unit 410 (S507).

The rock lock control unit 410 evaluates the informed bandwidth (S509), and determines that it is appropriate, that is, if it is determined that the call connection to the radio connection control block 100 is possible. In other words, it is to transmit the information to the rock (S511).

If it is determined that the bandwidth is not appropriate, the lake lock controller 410 determines whether the traffic is real time (S513), and in the case of real time traffic, requests the allocation of resources to the load controller 420 again (S517). .

The load control unit 420 receives the request and examines the required amount of resources, that is, checks the remaining resource state (S519), and informs the rock lock controller 410 of the result (S521), and the rock lock controller 410 Review the bandwidth again (S523).

Here, if the bandwidth is appropriate, the radio connection control block 100 notifies the call acceptance (S525).

If the non-real time traffic is determined in step S513, the lake lock controller 410 notifies the call rejection to the radio connection control block 100, and the lake lock controller 410 is determined in step S523 that the bandwidth is not appropriate. Notifies the call rejection to the radio connection control block 100 (S527).

3 is a flowchart illustrating a resource allocation procedure when a handover call processing request is made by the radio resource management apparatus shown in FIG. 1.

First, the handover control block 200 parameters Call Type, Class Type, and QoS to the lock control unit 410 of the radio resource control block 400 in order to establish a connection between radio sections in response to a request from the terminal. As requested by the lake (S601).

The lock control unit 410 receives this message, converts it into an internal message, and transmits it to the load control unit 420 (S603). The load control unit 420 receives this and checks the state of the existing residual resource (S605). The information is notified to the lake rock control unit 410 (S607).

The rock lock control unit 410 evaluates the informed bandwidth (S609), and determines that it is appropriate, that is, if it is determined that the call connection to the handover control block 200 is possible. In other words, it is to transmit the information to the rock (S611).

If it is determined that the bandwidth is not appropriate, the lake lock control unit 410 determines whether the traffic is real time (S613), and in the case of real time traffic, the load control unit 420 requests the resource allocation again (S617).

The load control unit 420 receives the request and examines the required amount of resources, that is, checks the remaining resource state (S619), and informs the rock lock controller 410 of the result (S621), and the rock lock controller 410 Review the bandwidth again (S623).

Here, if the bandwidth is appropriate, the radio connection control block 100 informs the call acceptance (S625).

If the non-real time traffic is determined in step S613, the lock lock controller 410 notifies the call-over rejection to the handover control block 200, and the lock lock controller 410 is determined even if the bandwidth is not appropriate in step S623. Notifies the call rejection to the handover control block 200 (S627).

4 is a flowchart illustrating a load control procedure in a wireless environment by the apparatus for managing a radio resource shown in FIG. 1. That is, the load control measured in the cell environment of the wireless section is shown.

First, the wireless connection control block 100 receives the load information (cell state, signal strength, etc.) measured from the terminal in a wireless environment and transmits it to the rock lock control unit 410 (S701). The rock lock controller 410 receives this message and passes it to the load controller 420 (S703), and the load controller 420 examines whether the load is not higher than a predetermined threshold based on this value (S705).

If the threshold value is greater than or equal to the load control request (Load Control Request) message to the lake lock control unit 410 for overload control (S707), the lake lock control unit 410 receives this message and the wireless connection control block 100 Notify to inform that the actual control of the load on the wireless section occurs (S709), and he performs the operation of limiting new calls or receiving only urgent calls during rock lock control (S711).

In addition, in step S705, if the load is not higher than the predetermined threshold value, normal processing is performed without performing a separate load control.

FIG. 5 is a flowchart illustrating a load control procedure of a system by the apparatus for managing radio resources shown in FIG. 1. That is, the load control of the system measured from the operation maintenance control block 300 is shown.

First, the operation maintenance control block 300 receives the load information (system load, the number of active calls, etc.) measured in the system for operation maintenance and transmits it to the lake lock control unit 410 (S801).

The lock lock control unit 410 receives this message and hands it over to the overload control unit 421 (S803). The overload control unit 421 examines whether the load is not higher than a predetermined threshold based on this value (S805).

If the threshold value is greater than or equal to the load control request message to the lake lock control unit 410 for overload control (S807), the lake lock control unit 410 receives this message to inform the operation maintenance control block 300 load control Notify that the start (S809), he or she is limited to the new call during the rock control or performs an operation that receives only an urgent call (S811).

In addition, if the load is not higher than the predetermined threshold in step S805, the normal processing is performed without performing any other load control.

It has been described so far limited to one embodiment of the present invention, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be included in the technical spirit described in the claims of the present invention.

As described above, the present invention has an effect of increasing service quality and efficiency through efficient radio resource allocation and load control of a mobile communication system.

In particular, the application is advantageous to the radio resource management function of the 3G evolution LTE base station.

Claims (6)

A wireless connection control block in charge of basic call processing in a wireless section through wireless signal protocol control; A handover control block for controlling a handover call; Radio resource control block for managing radio resources for processing the basic call or handover call Including; The radio resource control block, A load control unit which determines whether to perform overload control by allocating the radio resource and receiving collected load related information when the basic call and the handover call are attempted; The rock lock control unit determines whether to accept or reject the basic call or the handover call according to whether the bandwidth of the radio resource allocated by the load control unit is available and real-time traffic. Radio resource management apparatus of the mobile communication system comprising a. The method of claim 1, The load control unit, A load monitoring unit for acquiring measurement values such as load and signal strength measurement values of the wireless section and system load; An overload control unit which receives the measured values transmitted from the load monitoring unit, performs load control if the load is greater than or equal to a threshold value, and continuously monitors the system if the load is normal; A resource allocation unit for allocating a real resource to a call while maintaining and managing available resources for allocating resources in the case of the basic call or handover call attempt through an interface with the rock lock control unit; A resource state database that maintains and manages the resource state from creation of the basic call or the handover call to destruction while maintaining the resource state of the entire base station. Radio resource management apparatus of the mobile communication system comprising a. Allocating and collecting the radio resource control block for the basic call processing of the wireless section through the control of the radio signal protocol, the handover control block for controlling the handover call, and the radio resource when the basic or handover call is attempted. A load control unit for determining whether to perform overload control based on the received load related information and a lock lock control unit for determining whether to accept or reject the basic call or the handover call according to whether the bandwidth of the radio resource allocated by the load control unit is available and whether real-time traffic is available. A radio resource management method of a mobile communication system comprising: (a) requesting the lake lock control unit to the lake lock control unit in order to establish a connection between the wireless section by receiving a request from the terminal to the radio connection control block or the handover control block; (b) when the lake lock controller converts the message requesting the lake lock into an internal message and transmits the message to the load controller, the load controller checks the state of the existing remaining resources and informs the lake lock controller of the available bandwidth information. With the steps, (c) accepting or rejecting the basic call or the handover call according to the availability of bandwidth and real-time traffic by evaluating the bandwidth provided by the load control unit by the lake lock control unit; Radio resource management method of a mobile communication system comprising a. The method of claim 3, wherein Step (c), (c1) if it is determined that the bandwidth provided by the load control unit is available, the call connection to the radio access control block is available, but if it is determined that the bandwidth is not available to determine whether the traffic is real time Wow, (c2) requesting reallocation of resources to the load control unit if the traffic is real time, and notifying the radio connection control block of a call rejection if the traffic is non-real time; (c3) checking the remaining resource state by the load control unit that is requested to reallocate the resource and notifying the lake lock control unit of available bandwidth information; (c4) If the lake lock control unit determines that the bandwidth allocated in step (c3) is available and notifies the call connection to the radio access control block, if it is determined that the bandwidth is not appropriate, the radio access control block. Steps to Refuse Calls to Radio resource management method of a mobile communication system comprising a. Allocating and collecting the radio resource control block for the basic call processing of the wireless section through the control of the radio signal protocol, the handover control block for controlling the handover call, and the radio resource when the basic or handover call is attempted. A load control unit for determining whether to perform overload control based on the received load related information and a lock lock control unit for determining whether to accept or reject the basic call or the handover call according to whether the bandwidth of the radio resource allocated by the load control unit is available and whether real-time traffic is available. A radio resource management method of a mobile communication system comprising: (a) transmitting the load information measured from the terminal in the wireless environment or the load information measured in the system for operation preservation to the rock lock controller; (b) when the lake lock control unit passes the load information to the load control unit, examining whether the load control unit does not have a high load above a predetermined threshold value; (c) transmitting a load control request message for overload control when the predetermined threshold value or more is exceeded Radio resource management method of a mobile communication system comprising a. The method of claim 5, wherein In the step (c), the lake lock control unit restricts a new call or performs an operation of receiving only an urgent call. Radio resource management method of mobile communication system.

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