KR101894442B1 - Method and apparatus for processing paging for mobile communication - Google Patents

Abstract

The present invention relates to an apparatus and method capable of minimizing a load incurred in paging processing for a subscriber in an LTE / EPC network including an E-UTRAN.
In order to achieve the above object, according to the present invention, there is provided a method for recording a paging request, comprising the steps of: selecting a plurality of tracking area lists (TALs) when a paging request is received; Extracting the device information in the tracking area list using the extracted device information, and processing the paging request using the deduplicated tracking area list And a paging processing method.

Description

TECHNICAL FIELD [0001] The present invention relates to a paging processing method for mobile communication,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mobile communication service management method, and more particularly to a mobile communication service management method for performing paging processing in an LTE (Long Term Evolution) / EPC (Evolved Packet Core) network including an Evolved- UMTS Terrestrial Radio Access Network The present invention relates to a paging processing apparatus and method for mobile communication that can reduce unnecessary signal transmission processes by removing information of base stations in a tracking area list when using the tracking area list.

As is well known, a 3rd Generation Partnership Project (3GPP) mobile communication system based on a WCDMA (Wideband Code Division Multiple Access) radio access technology is widely deployed all over the world, and the first evolutionary stage of WCDMA HSDPA (High Speed Downlink Packet Access), which can be defined as a high-speed wireless communication system, provides a 3GPP mobile communication system with high-competitive wireless access technology in the mid-term future.

However, as the requirements and expectations of users and operators continue to increase and competition for development of wireless access technologies continues, there is a need to evolve new technologies in 3GPP mobile communication systems in order to gain competitiveness in the future. That is, a reduction in cost per bit, an increase in service availability, the use of a flexible frequency band, a simple structure and an open interface, and an appropriate power consumption of a UE are required. In addition, prevention of unnecessary latency at the network node and efficient use of network resources can also promote the technology evolution in 3GPP.

In 3GPP Release 8, EPC, which is a network architecture, is described as one of mobile communication systems for meeting the above-mentioned requirements. The EPC is a collection of network nodes for the 3GPP LTE system. The EPC supports the evolution of the core network of the existing 3GPP system architecture, supporting the evolved RAN (E-UTRAN), and the efficient network structure that simplifies the network node to increase the efficiency of the packet network. . A wireless communication system including an EPC and an E-UTRAN may be referred to as an EPS (Evolved Packet System), and this is an LTE mobile communication system currently being implemented and serviced in Korea.

On the other hand, the voice and video service of Voice (/ Multimedia) over LTE (hereinafter referred to as VoLTE) is a multimedia service using a packet bearer on the E-UTRAN in the LTE / EPC network. After accessing the LTE / EPC network and updating the subscriber location and status information through the subscriber information authentication step, a session setup and bearer allocation for the multimedia service is received and an appropriate QoS (Quality of Service).

Korean Patent Publication No. 10-2012-0030540, published on March 28, 2012.

The VoLTE voice / video service is provided as a packet data service on the PDN connectivity in the LTE / EPC network. Therefore, since the traffic flow for VoLTE voice / video service is basically the same as the data service including the general wireless Internet access, the traffic for providing the high quality wireless communication service In addition to control, overload control is essential due to the characteristics of wireless communication where a large amount of traffic is generated.

Particularly, a large amount of traffic of a paging process for transitioning an idle terminal to an active state can be generated. When an overload occurs due to such traffic, a voice / video service of a wireless communication service, for example, VoLTE, At present, there is no suggestion for such a technical countermeasure.

According to one aspect of the present invention, there is provided a method for tracking a paging request, the method comprising: selecting a plurality of tracking area lists (TALs) when there is a paging request; Extracting device information of the tracking area list from the device list, performing duplicate removal of the device information in the tracking area list using the extracted device information, and processing the paging request by using the deduplicated tracking area list The present invention also provides a paging processing method for mobile communication including the steps of:

In the paging processing method of the present invention, the selecting may be performed using position information received from a user terminal that requires paging processing.

In this case, the location information may be obtained using a Tracking Area Update (TAU) message received from a user terminal requiring paging processing.

According to another aspect of the present invention, there is provided an apparatus for tracking a paging request, the apparatus comprising: a TAL selection unit for selecting a plurality of tracking area lists in which device information for processing the paging request is set, And a paging request processing unit for processing a paging request by using the device information in each of the updated tracking area list. The paging request processing unit includes a paging request processing unit for processing the paging request by using the updated device information in each tracking area list The present invention provides a paging processing device for mobile communication.

The paging device of the present invention further includes a location information processing unit for receiving location information from a plurality of terminals and storing the location information in a storage unit. The TAL selection unit searches location information on the predetermined terminal from the storage unit The tracking area list can be selected using the searched location information.

In the paging apparatus of the present invention, the location information processing unit may receive location information from the plurality of terminals through a tracking area update (TAU) message.

The present invention compares eNB information set in a plurality of TALs to be used for paging processing and performs deduplication to reduce unnecessary paging attempts, thereby reducing the load of the system (e.g., MME).

1 is a block diagram of a mobile communication system suitable for a paging processing apparatus for mobile communication according to the present invention;
2 is a block diagram showing an internal configuration of a paging apparatus according to an embodiment of the present invention;
Figure 3 is an example of generating a TAL list in an embodiment of the present invention,
4 is a flowchart illustrating a paging process according to an embodiment of the present invention;

First, the advantages and features of the present invention, and how to accomplish them, will be made clear with reference to the embodiments to be described in detail with reference to the accompanying drawings. While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. It is to be understood that the following terms are defined in consideration of the functions of the present invention, and may be changed according to intentions or customs of a user, an operator, and the like. Therefore, the definition should be based on the technical idea described throughout this specification.

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

FIG. 1 is a block diagram of a mobile communication system suitable for a paging processing apparatus for mobile communication according to the present invention. The mobile communication system includes an eNodeB 102, a SGW 104, a PGW (PDN Gateway) 106, Charging Rule Function 108, Mobility Management Entity (MME) 110 and Home Subscriber Server (HSS) 112, and the like.

1, the eNodeB 102 exemplarily shows only one eNodeB for the sake of convenience of explanation and improvement of understanding, but it is also possible to provide a communication service (e. G., Voice service, video service) for several hundred to several thousand eNodeBs (Or various multimedia services including service, additional information service, etc.) can be supervised by the MME 110, dozens of eNodeBs form one TA (Tracking Area) area (or group) Several tens of TA areas can be managed in the form of forming one cell area.

That is, the eNodeB 102 is a device supporting next generation technologies and services such as LTE (or VoLTE), and includes radio frequency (RF) signal transmission and transmission signal strength and quality measurement, baseband signal processing, Resource management, and the like.

In addition, the eNodeB 102 can guarantee a stable connection with a plurality of terminal devices, receives a paging signal for paging a data call, i.e., paging request information from the MME 110, Lt; / RTI >

Next, the SGW 104 performs a session control (session) process for processing payload traffic according to a preset session based on a communication policy in the communication network provided from the PCRF 108 via a PGW 106 control and the like, and supports the hand-off in the LTE mobile communication system and the 3GPP in cooperation with the eNodeB 102 with the S1-U interface, and supports the handover of the PGW 106 An ESP bearer (Evolved Packet System bearer), and a PDU (Packet Data Unit) using tunneling.

In addition, the SGW 104 may generate a Downlink Data Notification (DDN) message according to the reception of the downlink data, and may forward the message to the MME 110.

The PGW 106 is a user plane node for assigning an IP address of a terminal apparatus according to a communication policy provided from the PCRF 108 and performing session control for interworking with an external Internet network and a non-3GPP network, SGW 104 and the external network, provides tunneling and IP routing functions, delivers the PDU to the SGW 104 and the external network, and transmits the policy priority information provided from the PCRF 108 to the SGW 104 and the external network, And transferring the data to the data processing unit 104.

Here, the PCRF 108 has a function of performing communication policy and accounting processing in a communication network, for example, by providing dynamic QoS and a charging rule according to a service data flow .

Meanwhile, the MME 110 is a node that manages the mobility of a terminal (terminal device), and can handle session management, idle subscriber management, paging, and subscriber authentication functions. That is, the MME 110 may control the control plane, such as processing a control signal when there is a binding request from the terminal or another network node, for example, the PGW 106 or the SGW 104, And receives the subscriber profile information, authentication and location related data from the HSS 112, which will be described later, and sets up an EPS bearer or an IP tunnel and performs mobility management, etc. Function can be performed.

When the UE is in an active state, i.e., in a communication state, the MME 110 can recognize the location of the UE on a cell-by-cell basis, and information about the eNodeB 102 installed in the cell in which the UE is located, .

On the other hand, when the MME 110 is in an idle state (a state in which communication is not being performed), the MME 110 recognizes the position of the terminal in units of a tracking area (TA). That is, the MME 110 can know from which TA the terminal in the idle state is located through the TAU (Tracking Area Update). Here, the UE transmits the changed TA information to the MME 110 using the TAU message every time the TA is changed. When the UE accesses the LTE network or receives a response to the TAU message, the TER (Tracking Area List, (Hereinafter referred to as "TAL") from the MME 110.

The MME 110 may perform a paging procedure to transition a mobile station to an active state when traffic is generated in a mobile station in an idle state. That is, the MME 110 may perform a paging procedure based on the latest location information of the mobile station, After selecting one or more TALs, a paging procedure is performed through the eNodeB 102 corresponding to the eNB information in the selected TAL, thereby enabling the UE to transition to the active state.

Meanwhile, when the TAL is selected, the MME 110 may perform paging using a plurality of TALs to increase the initial paging success rate. In this case, if there is an overlapping eNodeB (102) in the TAL, an unnecessary system is loaded. In order to eliminate such unnecessary load, the paging processing apparatus of the present invention is applied. That is, the MME 110 may comprise substantially the paging processing apparatus of the present invention (200 of FIG. 2), for example, as shown in FIG. 2, Specific details for controlling the unnecessary load through will be described in detail later with reference to FIG. 2 to FIG.

Finally, the HSS (Home Subscriber Server) 112 includes a database (not shown) including subscriber information of a wireless communication system for a legacy network (e.g., a WCDMA mobile communication system) and / or an LTE (or VoLTE) mobile communication system a data base, and the like, and may store subscriber profile information, authentication and location-related data, and the like.

Next, a paging processing technique of the present invention suitable for application to a mobile communication system having the above-described configuration will be described in detail.

FIG. 2 is a block diagram of a paging device 200 for mobile communication according to the present invention. The location information processing unit 210, the TAL selection unit 220, the filtering unit 230, the paging request processing unit 240, A storage unit 250, and the like.

Referring to FIG. 2, when the TAU message is received through communication with the AT, the location information processing unit 210 extracts the location information of the AT through the analysis of the TAU message, and stores the extracted location information in the storage unit 250. That is, the location information processing unit 210 can extract the location information of the terminal by determining which TA exists in the TA through analysis of the TAU message.

When a traffic is generated in the idle terminal, that is, when a downlink data notification (DDN) message is received from the SGW 104, the TAL selection unit 220 searches for the storage unit 250 And selects at least one TAL for paging processing based on the extracted location information and provides the selected TAL to the filtering unit 230. [ Here, at least one eNB information is set in the TAL.

In the embodiment of the present invention, at least one TAL is selected in the storage unit 250 storing a plurality of TALs, but the TAL may be generated based on the location information.

The filtering unit 230 may extract the eNB information by analyzing each TAL internal information provided from the TAL selection unit 220, and may perform deduplication using the extracted eNB information. Through the deduplication, the filtering unit 230 can change the TAL internal information, and provides the changed TAL internal information to the paging processing unit 240.

For example, when TAL1 in which the total of two pieces of device information eNB1 and eNB2 are set in the TAL selecting unit 220 and TAL2 in which three pieces of device information (eNB2, eNB3, eNB4) are set in total is selected, Similarly, the filtering unit 230 extracts duplicate eNB2 through comparison between TAL1 and TAL2 internal information, and removes the duplicated eNB2 from the extracted TAL1 or TAL2. Therefore, TAL1 can be changed to eNB1, and TAL2 can be changed to eNB2, eNB3, and eNB4.

In the embodiment of the present invention, the eNB information means a base station for paging processing, that is, eNodeB information.

The paging request processing unit 240 transmits paging to the eNodeB 102 corresponding to the changed TAL internal information. Accordingly, the eNodeB 102, which has received the paging, transmits a paging signal to the corresponding area.

As described above, unnecessary paging attempts can be reduced by performing redundancy removal by comparing eNB information set in a plurality of TALs to be used for paging processing, thereby reducing the load of the system (e.g., MME).

Next, a series of processes for controlling the load of the system through the paging device of the present invention having the above-described configuration will be described in detail.

4 is a flowchart illustrating a paging process according to an embodiment of the present invention.

4, when the mobile communication system is in the service mode, the location information processing unit 210 receives the TAU message from a plurality of terminals, extracts location information for each of the terminals, and transmits the TAU message to the storage unit 250 (Step 402).

Meanwhile, when the TAL selector 220 receives the paging request message for the predetermined terminal (step 404), the TAL selector 220 extracts the location information for the predetermined terminal through the search of the storage unit 250 (step 406).

Then, the TAL selector 220 selects at least one TAL among the pre-stored TAL based on the extracted location information or generates at least one TAL based on the extracted location information (step 408). The generated TAL is provided to the filtering unit 230.

Then, the filtering unit 230 extracts the eNB information set in each TAL, extracts the duplicated eNB information through comparison between the extracted eNB information, and leaves only one of the extracted duplicated eNB information and removes the remaining eNB information To update the TAL (step 410). The updated TAL is provided to the paging processing unit 240.

Then, the paging processor 240 delivers the paging signal to the eNodeB 102 corresponding to the eNB information in the updated TAL (step 412). Accordingly, the eNodeB 102 transmits the paging signal to the area managed by the eNodeB 102, thereby completing the paging procedure.

Therefore, the paging processing method according to the embodiment of the present invention can reduce unnecessary paging attempts by comparing the eNB information set in the plurality of TALs to be used for the paging processing and performing deduplication, Can be reduced.

In the meantime, each block of the accompanying block diagrams and combinations of steps of the flowchart may be performed by computer program instructions. These computer program instructions may be loaded into a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus so that the instructions, which may be executed by a processor of a computer or other programmable data processing apparatus, And means for performing the functions described in each step are created. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner, It is also possible for the instructions stored in the block diagram to produce a manufacturing item containing instruction means for performing the functions described in each block or flowchart of the block diagram. Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible that the instructions that perform the processing equipment provide the steps for executing the functions described in each block of the block diagram and at each step of the flowchart.

Also, each block or each step may represent a module, segment, or portion of code that includes at least one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative embodiments, the functions mentioned in the blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may sometimes be performed in reverse order according to the corresponding function.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. It is easy to see that this is possible. That is, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the present invention. Therefore, the scope of protection of the present invention should be construed in accordance with the following claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

200: Paging processor 210: Position information processor
220: TAL selector 230: Filtering unit
240: Paging processing unit 250:

Claims (6)

Selecting a plurality of tracking area lists (TALs) when there is a paging request;
Extracting redundant device information by comparing device information for processing a paging request in the selected tracking area list;
Performing deduplication on the device information in the tracking area list using the extracted device information,
And processing the paging request using the de-duplicated tracking area list
Paging processing method for mobile communication. The method according to claim 1,
Wherein the apparatus information includes base station information, and the duplicated tracking area list includes information indicating that the base station information overlapping due to the deduplication is absent
Paging processing method for mobile communication. The method according to claim 1,
Wherein the selecting comprises selecting based on location information received from a user terminal requiring paging processing,
The location information is acquired based on a Tracking Area Update (TAU) message received from a user terminal requiring paging processing
Paging processing method for mobile communication. A TAL selector for selecting, when a paging request for a predetermined terminal is received, a plurality of tracking area lists in which device information for processing the paging request is set;
A filtering unit for updating each of the tracking area lists by redundantly removing redundant device information through comparison between device information items in the selected tracking area list;
And a paging request processing unit for processing the paging request using the device information in each updated tracking area list
A paging processing device for mobile communication. 5. The method of claim 4,
And a location information processing unit for receiving location information from a plurality of terminals and storing the location information in a storage unit,
The TAL selector searches the storage unit for location information of the predetermined terminal and selects a tracking area list using the searched location information
A paging processing device for mobile communication. 6. The method of claim 5,
The location information processing unit receives the location information from the plurality of terminals through a tracking area update (TAU) message
A paging processing device for mobile communication.

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