KR101261364B1 - Method for Saving Power While Using Wireless LAN, System And Access Point Therefor - Google Patents

Abstract

One embodiment of the present invention relates to a power saving method when using a wireless LAN, a system and an AP therefor.
One embodiment of the present invention is a terminal for transmitting a second paging signal corresponding to the received first paging signal (Paging Signal); Overhearing the second paging signal, confirming whether the terminal enters WLAN coverage based on the overheared signal, and transmitting a coverage entry signal based on the confirmation result. An access point (AP); And a base station transmitting a third paging signal including coverage entry information to the terminal based on the received coverage entry signal.
According to an embodiment of the present invention, by using the paging signal of the base station to notify the terminal whether to enter the WLAN coverage by the terminal to save the power consumed when searching for AP to access the WLAN network have.

Description

Method for Saving Power While Using Wireless LAN, System And Access Point Therefor}

One embodiment of the present invention relates to a power saving method when using a wireless LAN, a system and an AP therefor. More specifically, in an environment in which a wireless LAN network and a mobile communication network are configured with the same backbone network, signal processing is performed between an access ponit (AP) and a base station owned by mobile communication operators to enter a specific AP coverage. When the terminal is identified, when using the WLAN to notify the terminal whether to enter the WLAN coverage by using the paging signal of the base station to save the power consumed when searching for the AP to access the WLAN network It relates to a power saving method and system and AP therefor.

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

2. Description of the Related Art [0002] In recent years, as computer, electronic, and communication technologies have dramatically developed, various wireless communication services using a wireless network have been provided. Accordingly, a service provided by a mobile communication system using a wireless communication network is developing into a multimedia communication service for transmitting data such as circuit data, packet data, and the like, as well as a voice service.

On the other hand, with the advent of smart phones in recent years, mobile data demand is rapidly increasing, and the amount of mobile traffic is expected to increase by about 39 times in the next 14 years. Many wireless service providers are installing APs that can access the WLAN network for the purpose of distributing traffic.

In the conventional wireless LAN access method, when the terminal is located within the coverage of an AP that can access the WLAN network, a method of searching for an AP in the terminal and then accessing the discovered AP is used. In the case where the user leaves the coverage of the AP, there is a problem that a lot of power is continuously consumed until the terminal searches for a new AP.

In order to solve the above-mentioned problem, an embodiment of the present invention uses a wireless LAN to notify a terminal whether to enter the wireless LAN coverage by using a paging signal of a base station so that the terminal can save power consumed when searching for an AP. The main purpose is to provide a city power saving method and a system and an AP therefor.

In order to achieve the above object, an embodiment of the present invention, a terminal for transmitting a second paging signal corresponding to the received first paging signal (Paging Signal); Overhearing the second paging signal, confirming whether the terminal enters WLAN coverage based on the overheared signal, and transmitting a coverage entry signal based on the confirmation result. An access point (AP); And a base station transmitting a third paging signal including coverage entry information to the terminal based on the received coverage entry signal.

In addition, according to another object of the present invention, an overhearing unit for overhearing the second paging signal transmitted by a terminal located in the vicinity to the base station; A coverage entry confirming unit confirming whether the terminal enters the WLAN coverage based on the overheard signal; And a signal transmitter for transmitting a coverage entry signal to the base station based on the result of the check, so that the base station transmits a third paging signal including coverage entry information to the terminal. .

In addition, according to another object of the present invention, transmitting a second paging signal corresponding to the first paging signal (Paging Signal) received from the terminal; Overhearing the second paging signal by an AP, confirming whether the terminal enters the WLAN coverage based on the overheard signal, and transmitting a coverage entry signal based on the verification result; And transmitting a third paging signal including coverage entry information to the terminal based on the coverage entry signal received from the base station.

As described above, according to an embodiment of the present invention, in an environment in which a wireless LAN network and a mobile communication network are constructed with the same backbone network, signal processing is performed between an AP and an access station owned by mobile communication operators. When the terminal entering the specific AP coverage is identified, the terminal uses the paging signal of the base station to notify the terminal whether to enter the wireless LAN coverage, so that the terminal consumes power when searching for the AP to access the WLAN network. There is a saving effect. That is, according to an embodiment of the present invention, while maximizing the WLAN network in the terminal, there is an effect that can minimize the power consumption.

1 is a block diagram schematically showing a power saving system when using a wireless LAN according to an embodiment of the present invention;
2 is a block diagram schematically illustrating an AP according to an embodiment of the present invention;
3 is a flowchart illustrating a power saving method when using a wireless LAN according to an embodiment of the present invention;
4 is an exemplary diagram for describing a power saving method according to whether a terminal enters WLAN coverage according to an embodiment of the present invention;
5 is an exemplary view for explaining each propagation environment according to an embodiment of the present invention.

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

The paging signal described in the present invention refers to a signal used by a base station or a paging controller to determine the location of the terminal (ie, any base station, a switching station, etc.) when an incoming call occurs in mobile communication. To further explain the general scheme of processing paging signals, when an incoming call occurs, the switching center generates a paging signal to all base stations in the region. That is, the paging signal refers to a signal for providing an incoming service in mobile communication. On the other hand, the first paging signal described in the present invention means the paging signal received by the terminal 110 from the base station 120, the second paging signal is a first paging signal transmitted by the terminal 110 to the base station 120 Paging signal corresponding to the. In addition, the third paging signal is a paging signal transmitted from the base station 120 to the terminal 110, the coverage entry information confirmed by the signal processing between the base station 120 and the AP (Access Point) 130 to the general paging signal Speak the signal containing additional.

In addition, the backbone network described in the present invention refers to a backbone network in which a technology for connecting important shared resources on the network is applied. For example, when the backbone network requires one network in multiple buildings, it means a centralized wiring structure for the interconnection of complex LANs between each building, and guarantees interconnection by high-speed cable. Means. On the other hand, the backbone network refers to a high-speed network is introduced to interconnect the various sub-networks to the public carriers, the Internet means a high-speed backbone network for interconnecting each ISP (Internet Service Provider). Hereinafter, the backbone network described in the present invention assumes that the WLAN network and the mobile communication network use the same backbone network.

1 is a block diagram schematically illustrating a power saving system when using a wireless LAN according to an embodiment of the present invention.

Power saving system when using a wireless LAN according to an embodiment of the present invention includes a terminal 110, the base station 120 and the AP 130. In an embodiment of the present invention, the power saving system using the WLAN is described as including only the terminal 110, the base station 120 and the AP 130, which is illustrative of the technical idea of an embodiment of the present invention As just described, those skilled in the art to which an embodiment of the present invention belongs will vary with respect to the components included in the power saving system when using a wireless LAN without departing from the essential characteristics of the embodiment of the present invention. Modifications and variations will be applicable.

The terminal 110 is a terminal having a communication module for performing a conventional voice call and data communication. The terminal 110 interworks with a communication network (not shown) using the provided mobile communication module and performs a normal voice call and data communication. . The terminal 110 refers to a terminal capable of transmitting and receiving various data by accessing the Internet network through the AP 130 recognized around the wireless LAN module. That is, the terminal 110 refers to a terminal equipped with both a mobile communication module and a wireless LAN module, and includes a mobile communication terminal, a smart phone, a personal computer, a laptop, and a personal digital assistant. Personal Digital Assistant) means a terminal having a memory for storing an application for using a WLAN service, a microprocessor for executing and controlling a program by executing a program, and the like.

The terminal 110 according to an embodiment of the present invention additionally performs the following operations in addition to the operations described above. That is, the terminal 110 receives a first paging signal for providing an incoming service from the base station 120 and transmits a second paging signal corresponding to the first paging signal to the base station 120. When the access request command for the WLAN is generated by the user's command or a specific application command, the terminal 110 activates the WLAN search and connects to the searched AP 130 based on the received third paging signal (Association). )do. Here, the operation of the terminal 110 to activate the WLAN search in more detail, the user of the terminal 110 executes an application for accessing the wireless LAN, or the application mounted on the terminal 110 is pushed In the case of requiring specific data in the form of (Push), the terminal 110 generates an access request command for the WLAN. At this time, the terminal 110 confirms the coverage paging information included in the third paging signal by checking the third paging signal received from the base station 120, and wirelessly connected to the AP 130 corresponding to the coverage paging information. LAN search can be enabled.

Meanwhile, referring to a technology for searching for the AP 130 in a different manner from the terminal 110 according to an embodiment of the present invention, the terminal 110 searches for the AP 130 at a fixed period, or If the search for the AP 130 is not performed at 110 and the search is not performed, there may be a method of doubling the search period or reducing the search period in the area where the WLAN network is searched. However, in this case, instead of reducing the power required to discover the WLAN network, even though there is a terminal present in the WLAN network, the time that the terminal can connect to the AP is reduced by not attempting to connect to the AP. This reduces the benefits of applications that need to make the most of the WLAN network.

The base station 120 refers to a device that performs a location registration function, a function of allocating a radio channel, and various functions required for radio signal processing such as handoff. In more detail with respect to the base station 120, the base station 120 may be configured to include a base station transmitter (not shown) and a base station controller (not shown), and refers to a device of the concept that supports both synchronous and asynchronous. . For example, when the base station 120 supports synchronous, the base station transmitter may be a base transceiver station (BTS), the base station controller may be a base station controller (BSC), and the base station 120 supports asynchronous. In this case, the base station transmitter may be a Node-B, and the base station controller may be a Radio Network Controller (RNC). In more detail with respect to the base station transmitter and the base station controller included in the base station 120, the base station transmitter transmits and receives a signal to and from the terminal 110 through a traffic channel of the signal channel, the base station controller controls the base station transmitter Assigning and releasing wireless channels to the terminal 110, controlling transmission outputs of the terminal and base station transmitters, determining soft handoff and hard handoff between cells, transcoding and vocoding ), GPS (Global Positioning System) clock distribution, baseband signal processing, wired and wireless conversion, wireless signal transmission and reception.

The base station 120 according to an embodiment of the present invention additionally performs the following operations in addition to the basic functions of the base station 120. That is, the base station 120 according to an embodiment of the present invention transmits a third paging signal including coverage entry information to the terminal 110 based on the coverage entry signal received from the AP 130. Herein, the process of transmitting the third paging signal by the base station 120 will be described in more detail. The base station 120 transmits the third paging signal to the terminal 110 corresponding to the terminal identification information included in the coverage entry signal. In the transmission, the push-type message information corresponding to the coverage entry information is included in the third paging signal. Here, the message information is preferably a Short Message Service (SMS) signal, which is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains are essential to the present invention. Various modifications and modifications to the form of message information may be applied without departing from the characteristics thereof.

Meanwhile, to describe an additional operation of the base station 120 according to an embodiment of the present invention, the base station 120 collects terminal identification information included in a coverage entry signal and collects all terminal information present in the WLAN coverage. Check it. That is, the operation of confirming all the terminal information existing in the WLAN coverage by the base station 120 will be described in detail. When receiving the coverage entry signal and collecting and identifying all the terminal identification information included in each coverage entry signal, the corresponding base station 120 enters all the terminals entering the coverage of the AP existing in the base station coverage You can check.

The AP 130 is a device for connecting data communication, and refers to a device capable of reading a receiving side address from the transmitting side information and designating the most appropriate communication path and transmitting the same to another communication network. The WLAN AP for the. That is, the AP 130 extracts the location of the WLAN data packet, designates the best communication path for the extracted location, and transmits the data packet to the next device along the designated communication path. You can also share In the present embodiment, the AP may be used as a concept including a router, a repeater, a repeater, and a bridge.

In addition, the AP 130 according to an embodiment of the present invention overhears the second paging signal transmitted from the terminal 110 to the base station 120 in addition to the basic functions for WLAN communication. The terminal 110 determines whether the terminal 110 enters the WLAN coverage, and transmits the coverage entry signal to the base station 120 based on the result of the check. In addition, the AP 130 stores information including at least one or more of a basic service set identifier (BSSID), a basic service set identifier (SSID), and AP channel information, which is a MAC address. That is, the AP 130 of the present invention is preferably an AP installed by a communication provider (that is, a wireless LAN network and a mobile communication network to use a backbone network together), and a terminal recognized in the vicinity ( When there is a connection request from the 110, not only the data communication is basically connected with the corresponding terminal 110, but also performs the above-described operation.

Referring to the process of the AP 130 overhearing the second paging signal transmitted from the terminal 110 to the base station 120, the terminal 110 is a first paging signal for providing the incoming service from the base station 120 Is received and transmits a second paging signal corresponding thereto to the base station 120. The terminal 110 transmits a second paging signal from the terminal 110 to transmit the second paging signal to the base station 120. Since broadcasting is performed in the air, the AP 130 may overhear the second paging signal transmitted from the terminal 110 to the base station 120.

Here, in more detail for the operation corresponding to an embodiment of the present invention in addition to the basic function of the AP 130, the AP 130 according to an embodiment of the present invention is the terminal 110 located in the vicinity of the base station Overhearing the second paging signal transmitted to the 120, and confirms whether the terminal 110 enters the wireless LAN coverage based on the overheared signal, the coverage entry signal to the base station 120 based on the confirmation result The base station 120 transmits the third paging signal including the coverage entry information to the terminal 110.

)와 기 설정된 신호세기인 임계치(

)에 근거하여 단말기의 무선랜 커버리지 진입 여부를 확인한다. Referring to how the AP 130 checks whether or not to enter the WLAN coverage, the AP 130 according to an embodiment of the present invention is an overhearing signal strength (signal strength of the overheared signal)

) And the threshold that is the preset signal strength (

Check whether the terminal enters the WLAN coverage.

)와 임계치(

)에 근거하여 어떻게 무선랜 커버리지 진입 여부를 확인하는지에 대해 보다 구체적으로 설명하자면, AP(130)는 오버히어링 신호세기(

)가 임계치(

)를 초과(

)하는 경우, 단말기가 무선랜 커버리지에 진입한 것으로 확인한다. 한편, AP(130)는 오버히어링 신호세기(

)가 임계치(

) 미만(

)인 경우, 단말기(110)가 무선랜 커버리지에 진입하지 않은 것으로 확인한다. 이 경우, AP(130)는 단말기(110)가 무선랜 커버리지에 진입하지 않았으므로, 추가적인 동작 즉, 커버리지 진입 정보를 기지국(120)으로 전송하지 않는다. 또한, AP(130)가 단말기 식별 정보를 확인 처리하는 동작에 대해 구체적으로 설명하자면, AP(130)는 오버히어링 신호세기(

)가 기 설정된 임계치(

)를 초과(

)하는 경우, 오버히어링된 신호를 디코딩하여 단말기 식별 정보를 확인하며, 연동하는 백본망을 이용하여 단말기 식별 정보가 할당된 기지국(120)으로 커버리지 진입 여부 신호를 전송한다. 한편, AP(130)는 단말기(110)와의 가상 인터페이스(Vitrual Interface)를 생성할 때, 기지국(120)으로 전송된 커버리지 진입 여부 신호를 근거로 가상 인터페이스에 접속하는 사용자 수를 설정할 수 있다.The AP 130 is over-hearing signal strength (

) And threshold (

To describe in more detail how to determine whether to enter the WLAN coverage on the basis of the AP, the AP 130 is the overhearing signal strength (

) Is the threshold (

Greater than

If it is determined that the terminal has entered the wireless LAN coverage. On the other hand, the AP 130 is the overhearing signal strength (

) Is the threshold (

Less than)

), It is confirmed that the terminal 110 has not entered the WLAN coverage. In this case, since the terminal 110 does not enter the WLAN coverage, the AP 130 does not transmit additional operations, that is, coverage entry information, to the base station 120. In addition, the AP 130 confirms the operation of confirming the terminal identification information in detail, the AP 130 is the overhearing signal strength (

) Is the preset threshold (

Greater than

In this case, the terminal information is identified by decoding the overheared signal, and a coverage entry signal is transmitted to the base station 120 to which the terminal identification information is allocated using the interworking backbone network. On the other hand, when generating the virtual interface (Vitrual Interface) with the terminal 110, the AP 130 may set the number of users accessing the virtual interface based on the coverage entry signal transmitted to the base station 120.

2 is a block diagram schematically illustrating an AP according to an embodiment of the present invention.

The AP 130 according to an embodiment of the present invention includes an overhearing unit 210, a coverage entry checker 220, a signal transmitter 230, and a virtual interface setting unit 240. In an embodiment of the present invention, the AP 130 is described as including only the overhearing unit 210, the coverage entry checker 220, the signal transmitter 230, and the virtual interface setting unit 240. As merely illustrative of the technical spirit of an embodiment of the present invention, those skilled in the art to which an embodiment of the present invention belongs, AP 130 within the scope without departing from the essential characteristics of an embodiment of the present invention For the components included in the) will be applicable to various modifications and variations.

)와 기 설정된 신호세기인 임계치(

)에 근거하여 단말기(110)의 무선랜 커버리지 진입 여부를 확인한다.The overhearing unit 210 overhears the second paging signal transmitted from the terminal 110 located in the vicinity to the base station. The coverage entry checker 220 confirms whether the terminal 110 enters the WLAN coverage based on the overheared signal. In more detail, the coverage entry confirming unit 220 includes an overhearing signal strength that is a signal strength of the overheared signal.

) And the threshold that is the preset signal strength (

It is checked whether the terminal 110 enters the wireless LAN coverage based on.

)가 임계치(

)를 이용하여 어떻게 단말기(110)가 무선랜 커버리지에 진입 여부를 판별하는지에 대해 설명하자면, 커버리지 진입 확인부(220)는 오버히어링 신호세기(

)가 임계치(

)를 초과(

)하는 경우, 단말기(110)가 무선랜 커버리지에 진입한 것으로 확인한다. 한편, 커버리지 진입 확인부(220)는 오버히어링 신호세기(

)가 임계치(

) 미만(

)인 경우, 단말기(110)가 무선랜 커버리지에 진입하지 않은 것으로 확인한다.Here, the coverage entry check unit 220 is the overhearing signal strength (

) Is the threshold (

To describe how the terminal 110 determines whether or not to enter the WLAN coverage, the coverage entry check unit 220 is the overhearing signal strength (

) Is the threshold (

Greater than

In this case, it is confirmed that the terminal 110 enters the WLAN coverage. On the other hand, the coverage entry check unit 220 is the overhearing signal strength (

) Is the threshold (

Less than)

), It is confirmed that the terminal 110 has not entered the WLAN coverage.

)가 기 설정된 임계치(

)를 초과(

)하는 경우, 오버히어링된 신호를 디코딩하여 단말기 식별 정보를 확인한다.In addition, when the coverage entry confirming unit 220 enters the wireless LAN coverage of the terminal 110, the operation process of checking the terminal identification information will be described.

) Is the preset threshold (

Greater than

In this case, the terminal identification information is confirmed by decoding the overheared signal.

The signal transmitter 230 transmits a coverage entry signal to the base station 120 based on the result of the coverage entry confirming unit 220 so that the base station 120 includes the coverage entry information to the terminal 110. Send a paging signal. That is, when it is confirmed that the terminal 110 enters the wireless LAN coverage, the signal transmitter 230 transmits a coverage entry signal to the base station 120 when the terminal 110 confirms the access to the wireless LAN coverage. The terminal 120 transmits the third paging signal including the coverage entry information to the terminal 110. Meanwhile, the signal transmitter 230 transmits a coverage entry signal to the base station 120 to which the terminal identification information identified through the coverage entry checker 220 is allocated using the interworking backbone network. When the virtual interface setting unit 240 generates the virtual interface with the terminal 110, the virtual interface setting unit 240 sets the number of users accessing the virtual interface based on the coverage entry signal transmitted to the base station 120.

3 is a flowchart illustrating a power saving method when using a wireless LAN according to an embodiment of the present invention.

When the terminal 110 is turned on, a first paging signal for performing a cell search for the neighboring base station 120 and providing an incoming service from the found base station 120 ) Is received (S310). Here, the cell refers to a coverage area in which one base station can control a radio resource used by the terminal 110. The terminal 110 transmits a second paging signal corresponding to the first paging signal received from the base station 120 to the base station 120 (S320). The AP 130 overhears the second paging signal transmitted from the neighboring terminal 110 to the base station 120 (S330).

)와 임계치(

)에 근거하여 어떻게 무선랜 커버리지 진입 여부를 확인하는지에 대해 보다 구체적으로 설명하자면, AP(130)는 오버히어링 신호세기(

)가 임계치(

)를 초과(

)하는 경우, 단말기가 무선랜 커버리지에 진입한 것으로 확인한다. 한편, AP(130)는 오버히어링 신호세기(

)가 임계치(

) 미만(

)인 경우, 단말기(110)가 무선랜 커버리지에 진입하지 않은 것으로 확인한다. 이 경우, AP(130)는 단말기(110)가 무선랜 커버리지에 진입하지 않았으므로, 추가적인 동작 즉, 커버리지 진입 정보를 기지국(120)으로 전송하지 않는다. The AP 130 checks whether the terminal 110 enters the WLAN coverage based on the overheard signal, and transmits a coverage entry signal to the base station 120 based on the check result (S340). In step S340, the AP 130 performs the overhearing signal strength (

) And threshold (

To describe in more detail how to determine whether to enter the WLAN coverage on the basis of the AP, the AP 130 is the overhearing signal strength (

) Is the threshold (

Greater than

If it is determined that the terminal has entered the wireless LAN coverage. On the other hand, the AP 130 is the overhearing signal strength (

) Is the threshold (

Less than)

), It is confirmed that the terminal 110 has not entered the WLAN coverage. In this case, since the terminal 110 does not enter the WLAN coverage, the AP 130 does not transmit additional operations, that is, coverage entry information, to the base station 120.

)가 기 설정된 임계치(

)를 초과(

)하는 경우, 오버히어링된 신호를 디코딩하여 단말기 식별 정보를 확인하며, 연동하는 백본망을 이용하여 단말기 식별 정보가 할당된 기지국(120)으로 커버리지 진입 여부 신호를 전송한다. In addition, to specifically describe the operation of the AP 130 confirms the terminal identification information in step S340, the AP 130 is the overhearing signal strength (

) Is the preset threshold (

Greater than

In this case, the terminal information is identified by decoding the overheared signal, and a coverage entry signal is transmitted to the base station 120 to which the terminal identification information is allocated using the interworking backbone network.

The base station 120 transmits a third paging signal including the coverage entry information to the terminal 110 based on the coverage entry signal received from the AP 130 (S350). To describe in detail the process of the base station 120 transmits the third paging signal in step S350, the base station 120 is the third paging to the terminal 110 corresponding to the terminal identification information included in the coverage entry signal; When transmitting the signal, the push-type message information corresponding to the coverage entry information is included in the third paging signal. Here, the message information is preferably an SMS signal, which is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains do not depart from the essential characteristics of the present invention. In the above, various modifications and modifications of the form of message information may be applied.

The terminal 110 receives the third paging signal from the base station 120, activates the WLAN search when the access request command for the WLAN is generated, and searches the AP 130 based on the received third paging signal. Connect (S360). In more detail for the operation of the terminal 110 to activate the WLAN search in step S360, the user of the terminal 110 executes an application for accessing the WLAN, or the application mounted on the terminal 110 In the case of requiring specific data in the form of a push, the terminal 110 generates an access request command for the WLAN. At this time, the terminal 110 checks the third paging signal received from the base station 120, confirms the coverage entry information included in the third paging signal, to connect to the AP 130 corresponding to the coverage entry information You can activate the WLAN search.

In FIG. 3, steps S310 to S360 are described as being sequentially executed. However, this is merely illustrative of the technical idea of an embodiment of the present invention, and the general knowledge in the technical field to which an embodiment of the present invention belongs. Those having a variety of modifications and variations may be applicable by changing the order described in FIG. 3 or executing one or more steps of steps S310 to S360 in parallel without departing from the essential characteristics of an embodiment of the present invention. 3 is not limited to the time series order.

As described above, the method for saving power when using the WLAN according to an embodiment of the present invention described in FIG. 3 may be implemented in a program and recorded in a computer-readable recording medium. The computer-readable recording medium having recorded thereon a program for implementing a power saving method when using a wireless LAN according to an embodiment of the present invention includes all kinds of recording devices storing data that can be read by a computer system. . Examples of such computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and also implemented in the form of a carrier wave (e.g., transmission over the Internet) . The computer readable recording medium may also be distributed over a networked computer system so that computer readable code is stored and executed in a distributed manner. In addition, functional programs, code, and code segments for implementing an embodiment of the present invention may be easily inferred by programmers skilled in the art to which an embodiment of the present invention belongs.

4 is an exemplary view for explaining a power saving method according to whether the terminal enters the WLAN coverage according to an embodiment of the present invention.

Before describing FIG. 4, the AP 130 uses the same backbone network as the mobile communication network of the base station 120, and the overhearing unit 210, the coverage entry checker 220, and the signal transmitter are connected to the AP 130. Assume that 230 and the virtual interface setting unit 240 is mounted.

는 오버히어링 신호세기를 말하며,

는 기 설정된 신호세기인 임계치를 말한다.According to an embodiment of the present invention, the terminal 110 basically does not perform the AP 130 search for accessing the WLAN network in the region where the AP 130 is not present, whereas the paging is continuously performed with the base station 120. Send and receive signals Accordingly, the AP 130 may overhear the second paging signal transmitted from the terminal 110 to the base station 120 and decode the overheared signal. Here, Rin shown in FIG. 4 refers to the coverage of the AP 130,

Is the overhearing signal strength,

Denotes a threshold that is a preset signal strength.

Next, the operation of the AP 130 will be described. The AP 130 overhears the second paging signal transmitted from the neighboring terminal 110 to the base station 120 and based on the overheared signal, The mobile station determines whether to enter the wireless LAN coverage of the 110 and transmits a coverage entry signal to the base station 120 based on the check result, so that the base station 120 transmits a third paging signal including the coverage entry information to the terminal 110. Send it.

)와 기 설정된 신호세기인 임계치(

)에 근거하여 단말기의 무선랜 커버리지 진입 여부를 확인한다. Here, how to determine whether the AP 130 enters the WLAN coverage, AP 130 according to an embodiment of the present invention is the signal strength of the overhearing signal (overhearing signal strength)

) And the threshold that is the preset signal strength (

Check whether the terminal enters the WLAN coverage.

)와 임계치(

)에 근거하여 어떻게 무선랜 커버리지 진입 여부를 확인하는지에 대해 보다 구체적으로 설명하자면, AP(130)는 오버히어링 신호세기(

)가 임계치(

)를 초과(

)하는 경우, 단말기가 무선랜 커버리지에 진입한 것으로 확인한다. 한편, AP(130)는 오버히어링 신호세기(

)가 임계치(

) 미만(

)인 경우, 단말기(110)가 무선랜 커버리지에 진입하지 않은 것으로 확인한다. 이 경우, AP(130)는 단말기(110)가 무선랜 커버리지에 진입하지 않았으므로, 추가적인 동작 즉, 커버리지 진입 정보를 기지국(120)으로 전송하지 않는다. 또한, AP(130)가 단말기 식별 정보를 확인 처리하는 동작에 대해 구체적으로 설명하자면, AP(130)는 오버히어링 신호세기(

)가 기 설정된 임계치(

)를 초과(

)하는 경우, 오버히어링된 신호를 디코딩하여 단말기 식별 정보를 확인하며, 연동하는 백본망을 이용하여 단말기 식별 정보가 할당된 기지국(120)으로 커버리지 진입 여부 신호를 전송한다. The AP 130 is over-hearing signal strength (

) And threshold (

To describe in more detail how to determine whether to enter the WLAN coverage on the basis of the AP, the AP 130 is the overhearing signal strength (

) Is the threshold (

Greater than

If it is determined that the terminal has entered the wireless LAN coverage. On the other hand, the AP 130 is the overhearing signal strength (

) Is the threshold (

Less than)

), It is confirmed that the terminal 110 has not entered the WLAN coverage. In this case, since the terminal 110 does not enter the WLAN coverage, the AP 130 does not transmit additional operations, that is, coverage entry information, to the base station 120. In addition, the AP 130 confirms the operation of confirming the terminal identification information in detail, the AP 130 is the overhearing signal strength (

) Is the preset threshold (

Greater than

In this case, the terminal information is identified by decoding the overheared signal, and a coverage entry signal is transmitted to the base station 120 to which the terminal identification information is allocated using the interworking backbone network.

Based on the foregoing description, the terminal is out of the WLAN coverage by way of example. Even if the terminal 110 is out of the WLAN network coverage, the terminal 110 continuously transmits a paging signal to the base station 120. As a result, the AP 130 may determine the strength of the signal by overhearing the paging signal between the terminal 110 and the base station 120.

)와 기 설정된 신호세기인 임계치(

)를 비교하여 오버히어링 신호세기(

)가 임계치(

)미만인 경우, 단말기(110)가 AP(130)의 커버리지를 벗어난 것으로 확인할 수 있다.That is, if the terminal 110 is out of the coverage of the AP 130, since the distance between the terminal 110 and the AP 130 is far, the second paging signal that the AP 130 overhearing from the terminal 110 Since the overhearing signal strength of is reduced in proportion to the distance away, the overhearing signal strength of the overheared signal after the AP 130 overhears the second paging signal received from the terminal 110 (

) And the threshold that is the preset signal strength (

) To compare the overhearing signal strength (

) Is the threshold (

If less than, it can be confirmed that the terminal 110 is out of coverage of the AP (130).

)와 기 설정된 신호세기인 임계치(

)를 비교하여 오버히어링 신호세기(

)가 임계치(

)를 초과하는 경우, 단말기(110)가 AP(130)의 커버리지 내에 진입한 것으로 확인한다. 이때, AP(130)는 백본망을 통해 기지국(120)으로 해당 단말기(110)가 커버리지 내에 진입했음을 알리는 커버리지 진입 여부 신호를 전송한다. 기지국(120)은 해당 단말기(110)로 제 3 페이징 신호를 전송할 때, 제 3 페이징 신호에 커버리지 진입 정보에 해당하는 푸쉬 형태의 메시지 정보를 포함시켜 단말기(110)로 전송하게 된다. 단말기(110)는 기지국(120)으로부터 제 3 페이징 신호를 수신하며, 무선랜에 대한 접속 요청 명령이 발생한 경우 무선랜 검색을 활성화하며, 수신된 제 3 페이징 신호를 근거로 검색된 AP(130)로 연결한다.On the other hand, when the terminal 110 is described in the coverage of the AP 130 by way of example, when the terminal 110 enters within the coverage of the AP 130, the terminal 110 is close to the AP 130. Since the AP 130 increases in proportion to the distance of the signal strength of the paging signal overhearing from the terminal 110, the AP 130 overhears the second paging signal received from the terminal 110. Overhearing signal strength

) And the threshold that is the preset signal strength (

) To compare the overhearing signal strength (

) Is the threshold (

If greater than), it is confirmed that the terminal 110 has entered the coverage of the AP (130). In this case, the AP 130 transmits a coverage entry signal indicating that the terminal 110 has entered the coverage area to the base station 120 through the backbone network. When the base station 120 transmits a third paging signal to the corresponding terminal 110, the base station 120 includes the push type message information corresponding to the coverage entry information in the third paging signal and transmits it to the terminal 110. The terminal 110 receives the third paging signal from the base station 120, activates the WLAN search when the access request command for the WLAN is generated, and searches the AP 130 based on the received third paging signal. Connect.

5 is an exemplary view for explaining each propagation environment according to an embodiment of the present invention.

5A is an exemplary diagram illustrating a propagation environment in which a few APs exist. That is, in the propagation environment as shown in FIG. 5A, the conventional terminal 110 continuously searches for an AP to access the WLAN network, and consumes a large amount of power. That is, if it is assumed that the terminal 110 moves as shown in the solid line of FIG. 5A, when there is no AP searched in the vicinity, the terminal 110 continuously searches for the AP until the searched AP comes out. Since it is found, the terminal 110 consumes power continuously. In this case, even if the terminal 110 searches for an AP, if the terminal 110 moves to another area, the terminal 110 is out of coverage of the corresponding AP, and thus continuously searches for the AP until another AP comes out. In the process, power consumption will continue to occur.

5B is an exemplary diagram illustrating a propagation environment in which a plurality of APs exist.

That is, if it is assumed that the conventional terminal 110 moves as shown in the solid line in the propagation environment as shown in FIG. 5B, the terminal 110 recognizes an AP searched around, but the terminal 110 If you move to another area, you have to repeat the process of re-searching the AP to recognize the new AP, so it may consume less power than the environment of FIG. Since the AP needs to be searched, power consumption is frequently generated in the terminal 110.

That is, when one embodiment of the present invention is applied to (A) and (B) of FIG. 5, the terminal 110 receives a third paging signal from the base station 120, and the access request command for the WLAN is Only when the wireless LAN search is activated and connected to the AP 130 searched on the basis of the received third paging signal, as shown in FIG. 5A, there are a few APs or FIG. 5B. ) Can save power regardless of the environment where multiple APs exist.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

110: terminal 120: base station
130: AP 210: overhearing unit
220: coverage entrance check unit 230: signal transmission unit
240: virtual interface setting unit

Claims (15)

A terminal for transmitting a second paging signal corresponding to the received first paging signal;
Overhearing the second paging signal, confirming whether the terminal enters WLAN coverage based on the overheared signal, and overhearing signal strength that is a signal strength of the overheared signal (

) Is the preset signal strength threshold (

Greater than

In case of determining that the terminal enters the WLAN coverage, decode the overheared signal and then check the terminal identification information, and identify the terminal using an interworking backbone network. An access point (AP) for transmitting a coverage entry signal to a base station to which information is allocated; And
The base station transmitting a third paging signal including coverage entry information to the terminal based on the received coverage entry signal;
Wherein, the terminal activates a WLAN search when a command for access to the WLAN occurs, the power saving system when using a WLAN (Association) connected to the AP retrieved based on the received third paging signal . delete delete delete The method of claim 1,
The base station comprises:
When the third paging signal is transmitted to the terminal corresponding to the terminal identification information included in the coverage entry signal, the push-type message information corresponding to the coverage entry information is included in the third paging signal. Power saving system when using a wireless LAN, characterized in that. The method of claim 5, wherein
The message information is a power saving system when using a wireless LAN, characterized in that the SMS (Short Message Service) signal. The method of claim 1,
The base station comprises:
And collecting all the terminal identification information included in the coverage entry signal to identify all the terminal information existing in the wireless LAN coverage. An overhearing unit for overhearing a second paging signal transmitted from a neighboring terminal to a base station;
Overheard Overhearing Signal Strength (

) Is the threshold (

Greater than

In case of determining that the terminal has entered the WLAN coverage, the overhearing signal strength (

Is the threshold (

Less than)

), When the terminal confirms that the terminal has not entered the WLAN coverage, and when the terminal determines that the WLAN has entered the coverage, the coverage entry which decodes the overheared signal to confirm the terminal identification information. Identification unit;
By transmitting the coverage entry signal to the base station to which the terminal identification information is allocated using a backbone network that interoperates, such that the base station transmits a third paging signal including the coverage entry information to the terminal, A signal transmitter for enabling the terminal to activate a WLAN search and to associate with the terminal based on the received third paging signal when an access request command for the WLAN is generated; And
When generating a virtual interface with the terminal, a virtual interface setting unit for setting the number of users accessing the virtual interface based on the coverage entry signal transmitted to the base station
AP comprising a.
delete delete delete delete delete delete delete

Images