100年4月29曰修正替換頁 九、發明說明： 【發明所屬之技術領域】 本發明係關於無線區域網路領域，特別是，關於一種 可維持連線之無線區域網路系統及其方法。 【先前技術】 資訊與通訊科技於近幾年之間快速發展，且於大眾間 普及’從以前的撥接網路至今日的寬頻網路，有線網路至 無線網路，家用固定式電話至手機，甚至語音與數據、通 訊及廣播等資訊皆可在網路間傳遞。尤其是傳輸頻譜係由 美國聯邦通訊委員會(FCC)所制定的無線區域網路 (Wireless Local Area Network，WLAN)，其使用的頻譜範圍 屬於ISM(Industrial Science Medical)免費公用頻段，包括 工業用的902〜928MHz(26MHz)波段；科學研究用的2.4 〜24835GHz(83.5MHz)波段；以及醫療用途的515〜</ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; [Prior Art] Information and communication technology has developed rapidly in recent years and has spread popular among the public. From the previous dial-up network to today's broadband network, wired network to wireless network, home fixed telephone to Mobile phones, even voice and data, communications and broadcasts, can be delivered between networks. In particular, the transmission spectrum is a Wireless Local Area Network (WLAN) developed by the US Federal Communications Commission (FCC). The spectrum used is in the free common frequency band of ISM (Industrial Science Medical), including industrial 902. ~ 928MHz (26MHz) band; 2.4 to 24835GHz (83.5MHz) band for scientific research; and 515~ for medical use
5.35GHz 與 5.725〜5.825GHz 波段。自從 1997 年 IEEE 802.11標準訂定後，無線區域網路發展至今已有十年左 右，使得所有支援無線區域網路的電子裝置可在任何時 間、任何地點’透過無線存取點(Access p〇int，人p)獲得所 ，的任何資訊’而其中的—個應用即電子商務。電子商務 係，透過網際網路進行購買、銷售或交換商品、服務及資 訊，活動^例如商品交易、廣告、服務、資訊提供、金融 匯兒及市場情報等。目此無線區酬路舰了難必須 =點上網之_，行動上峨卫作與生活更具機動性，工 乍的進展將不再受制於時空魏設備的限制。 100年4月29日修正替換頁 支援無線區域網路的電子裝置完成連線必須先收聽 (listen)附近通訊範圍内的無線區域網路，並判定自己是否 有權使用該無線區域網路，上述收聽的程序也稱為掃描 (scanning)。然而當電子裝置為了省電或其他目的進入待 機狀態時，電子裝置便失去與無線區域網路之連線，一旦 電子裝置回復到操作狀態時’通常需要一段時間重新建立 電子裝置與無線存取點間的連線。電子裝置之使用者因而 在等待連線上浪費了自己寶貴的時間。因此，有必要提供 一種可維持連線之無線區域網路系統及其方法，使電子裝 置之無線區域網路可達到「隨開即用」的目標。 【發明内容】 本發明之一方面在於提供一種維持一無線區域網路 系統之連線狀態的方法，此無線區域網路系統設置於一主 系統中且可與一無線存取點連線，此方法包含以下步驟： ，供一處理單元；當主系統進入待機或休眠狀態時，處理 單兀接管無線區域網路系統’以維持無線區域網路系統之 連線狀態；以及當主系統被喚醒時，主系統接管無線區域 網路系統。 本發明之另一方面在於提供一種維持連線之無線區 域網路系統，此無線區域網路系統設置於一主系統中，此 無線區域網路系統包含：一輸入/輸出介面，供無線區域 網路系統與主系統通信；一天線，供無線區域網路系統與 無線存取點連線；以及一處理單元；其中當主系統於操 作狀態時，由主系統來控制無線區域網路系統，且其中當 主系統進入待機或休眠狀態時，由處理單元接管無線區域 100年4月29日修正替 -- 網路系統，以維持無線區域網路系統之連線狀態。 【實施方式】 、本發明揭露一種維持連線之無線區域網路系統及其 方法，其可建置於筆記型電腦、個人數位助理(pDA)、手 機或其他電子產品上。為了使本發明之敘述更加詳盡與完 備’可參照下列描述並配合圖1至圖5之圖式。 參考圖1，於一實施例中，本發明提供一種維持連線 之無線區域網路系統102,其包含：一輸入/輸出介面1〇4， 供無線區域網路系統102與一主系統10〇進行通信；一天 線106，供無線區域網路系統1〇2與一無線存取點log連 線；以及一處理單元11〇,設置於該無線區域網路系統1〇2 中，並與^入/輸出介面104及媒體存取控制單元112連 接；其中當主系統1〇〇於操作狀態時，由主系統1〇〇控制 無線區域網路系統1〇2，且其中當主系統100進入待機或 休眠狀態時’處理單元接管無線區域網路系統1〇2， 以維持無線區域網路系統1〇2與無線存取點108之間的連 線狀態。 於一實施例中’處理單元110可由微處理器/微控制器 實現。並且’值得注意的是，雖然於圖1中，處理單元11〇 係設置於該無線區域網路系統1〇2中，然而這只是一示範 例’並非為了限縮本發明。此外，於一實施例，無線區域 網路系統102亦可設置於主系統100中，此時供給處理單 元110的電力可取自主系統1〇〇中一直開啟(always on)的 電源’例如基本輸出輸入系統(Basic Input Output System， 100年4月29曰修正替換頁 BIOS)之電池。 此外，圖1所示之無線區域網路系統102，更能設計 當主系統100關機時’處理單元110接管無線區域網路系 統102，以維持無線區域網路系統ι〇2與無線存取點ι〇8 之間的連線狀態，且當主系統1〇〇開機時，由主系統1〇〇 控制無線區域網路系統102。 圖1中’無線區域網路系統102更包含一射頻單元 116、一基頻單元114及一媒體存取控制單元112。如熟習 此技藝人士所知，射頻單元116可由展頻傳收器(Spread spectrum transceiver)、低雜訊放大器（LNA)、混波器 (Mixer)、雙頻合成器(Dual frequency synthesizer)、功率放 大器(Power Amplifier)等構成，以用來處理天線1〇6接收的 訊號，再傳送至基頻單元114，或是處理基頻單元114傳 來的訊號，再由天線106傳送出去。基頻單元則是用來將 ，頻單元114傳來的訊號進行解碼/解調變，或將媒體存取 早元112傳來的訊就進行編碼/調變，例如於ieee 8〇2.11b 11Mbps中調變技術為CCK，於正匪8〇2 na中調變技術 為OFDM ’對於IEEE 802.11g之必要規格為〇FDM，可 往前相容IEEE 802.11b之CCK調變技術，選擇性規格則 為CCK/OFDM或TI所提出的pbcc調變技術。媒體接取 控制單元112則用來控制訊號整體之傳輸過程。此外，在 設計上，基頻單兀114及媒體存取控制單元112 一般可被 整合在同-晶片上，或者亦可將射鮮元116、基頻 114與媒體存取控制單元112皆整合到一晶片上。 100年4月29曰修正替換頁 圖1中，主系統100包含一中央處理器(Cpu)iπ，中 央處理器118以一北橋晶片組12〇為橋樑，與一圖形運算 處理器(GPU)122、-記憶體124及一南橋晶片組126溝 通。一般而言，無線區域網路系統102係以南橋晶片組126 為橋樑與主系統100溝通。因此來自主系统號可 透過南橋晶片組⑶’並藉由輸入/輸出;;面104傳^至無 線區域網路系統102。於此實施例，若主系統1〇〇處於操 作狀態，則處理單元110可將來自主系統的訊號直接傳遞 給媒體存取控制單元112。於其他實施例，無線區域網路 系統可更包含一多工單元230(參見圖2)，當主系統10〇處 於操作狀態時，來自天線106或來自主系統100之訊號透 過多工單元230於該無線區域網路系統1〇2中傳遞，而不 需經過該處理單元110。 繼續參考圖1，圖式中一記憶單元128可供處理單元 110存取，記憶單元128中可儲存無線存取點108之相關 資訊及無線區域網路之使用者資訊。且於一實施例中，記 憶單元128更儲存曾經使用過之無線存取點的相關資訊及 對應的使用者資訊，供處理單元110使用。 接著參考圖3，其說明一種維持一無線區域網路系統 之連線狀態的方法。此無線區域網路系統設置於一主系統 中，且可與一無線存取點連線，此方法包含以下步驟：於 步驟302中’提供一處理單元，此處理單元可為一微處理 器/微控制器；於步驟304中，當主系統進入待機或休眠狀 態，處理單元接管無線區域網路系統，以維持該無線區域 網路系統之連線狀態；以及於步驟306中，當主系統被喚 10^7月 2 9 曰修 '------ 醒(wake-up)，由主系統接管無線區域網路系統。 此外，於一實施例，步驟304與步驟3〇6 時’處理單元接管無線區域網路系統，以_ ΐίΪίΐϊΐ統之連線狀態；以及當主系統開機時， 由主系統接管無線區域網路系統。 揮罝於二實施例，步驟3〇2更包含提供—記憶單元，供處 理卓π存取，且提供的記鮮元航科 系統中。提供的記憶單元可用來館存曾;使用、： =無，取點的相關資訊及對應的使用者資訊。於此實施 例’步驟304之處理單元接管無線區域網路系統的過程更 可進二步參考圖4之時序圖，圖4說明一主系統4〇〇與一 ，理單το41G間的時序示意圖。首先，當主系統4。。進入 待機或休眠狀態時，主系統4〇〇通知處理單元41〇自己將 進入待機或休眠狀態(402);處理單元410請求一無線存取 點之相關資訊及無線區域網路之使用者資訊(4〇4);主系統 400將無線存取點之相關資訊及無線區域網路之使用者資 訊’例如無線存取點之服務識別碼(Serviee Set iDentifier, SSID)、使用者之有線等效加密(wire(j Equivalent Privacy, WEP)及無線應用軟體協定(wireiess Application Protocol， WAP)金鑰或其他資訊，傳送至處理單元41〇，並儲存於記 憶單元中(406);最後主系統4〇〇致能處理單元410接管無 線區域網路系統’以進入待機或休眠狀態(408)。 反之’步驟306之主系統接管無線區域網路系統的過 程更可進一步參考圖5之時序圖。首先，主系統透過處理 10 1344768 100年4月29曰修正替換頁 單元檢查無線區域網路系統的連線狀態(5〇2);處理單元傳 送無線區域網路系統的連線狀態給主系統(5〇4);主系統請 求無線存取點之相關資訊及無線區域網路之使用者資訊 (506);處理單元將無線存取點之相關資訊及無線區域網路 之使用者資訊傳送給主系統(508) ’最後主系統停止處理單 元410之作用’並接管區域網路模組(51〇)。 因此，上述供處理單元存取的記憶單元，除了儲存待 機休眠之前正在連射的無線存祕之資訊 碼卿狄外，更可儲存過去曾經連線之無線存取 訊，並儲存其對應的使用者授權瑪/密碼等，使得主 休目，、待機棚機移動的狀態巾，藉*處理單元存取記 ^元=取得的不同無線存取點之使用者授^機 制’亦能轉連線狀態。 n —士 ί上所述僅為本發明之較佳實施例邮，並非用以限 圍；凡其它未脫離本發明所揭示之 HI圍; 變或修舞’均應包含在下述之申請 【圖式簡單說明】 一種維持連線之 圖1為根據本發明之一具體實施例， 無線區域網路系統之方塊圖； ，2為根據本發明之—具體實施例 之無線區域網路系統之方塊圖； 裡維得運線 圖3為根據本發明之一具體實施例，—種維持一無線 11 1344768 100年4月29曰修正替換頁 區域網路系統之連線狀態的方法； 圖4為根據本發明之一具體實施例，處理單元接管無 線區域網路系統之時序圖；以及 圖5為根據本發明之一具體實施例，主系統接管無線 區域網路系統之時序圖。 【主要元件符號說明】 100 主系統 102無線區域網路系統 104輸入/輸出介面 106天線 108無線存取點 110處理單元 112媒體存取控制單元 114基頻單元 116射頻單元 118中央處理器 120北橋 122圖形運算處理器 124記憶體 126南橋 128記憶單元 230多工單元 125.35GHz and 5.725~5.825GHz band. Since the IEEE 802.11 standard was established in 1997, the wireless local area network has been in development for about ten years, enabling all electronic devices supporting wireless local area networks to pass through wireless access points (Access p〇int) at any time and any place. , person p) get any information about ', and one of them is e-commerce. E-commerce is the purchase, sale or exchange of goods, services and information through the Internet, such as commodity trading, advertising, services, information provision, financial exchange and market intelligence. In this wireless zone, it is difficult to use the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ On April 29, 100, the replacement page supports the wireless local area network. The electronic device must first listen to the wireless local area network within the nearby communication range and determine whether it has the right to use the wireless local area network. The program to listen to is also called scanning. However, when the electronic device enters the standby state for power saving or other purposes, the electronic device loses connection with the wireless local area network, and once the electronic device returns to the operating state, it usually takes a period of time to re-establish the electronic device and the wireless access point. The connection between the two. The user of the electronic device thus wastes his precious time waiting for the connection. Therefore, it is necessary to provide a wireless local area network system and method for maintaining the connection, so that the wireless local area network of the electronic device can achieve the goal of "out of the box". SUMMARY OF THE INVENTION One aspect of the present invention provides a method for maintaining a connection state of a wireless local area network system, the wireless local area network system being disposed in a main system and connectable to a wireless access point. The method comprises the steps of: providing a processing unit; when the primary system enters a standby or hibernation state, the processing unit takes over the wireless local area network system to maintain the connection state of the wireless local area network system; and when the primary system is woken up The main system takes over the wireless local area network system. Another aspect of the present invention is to provide a wireless local area network system for maintaining a connection. The wireless local area network system is disposed in a main system, and the wireless local area network system includes: an input/output interface for the wireless area network. The road system communicates with the main system; an antenna for the wireless local area network system to connect with the wireless access point; and a processing unit; wherein when the main system is in an operating state, the main system controls the wireless local area network system, and When the main system enters the standby or hibernation state, the processing unit takes over the wireless area on April 29, 100, and replaces the network system to maintain the connection state of the wireless local area network system. [Embodiment] The present invention discloses a wireless local area network system and method for maintaining the connection, which can be built on a notebook computer, a personal digital assistant (pDA), a mobile phone or other electronic products. In order to make the description of the present invention more detailed and complete, the following description can be referred to and in conjunction with the drawings of Figs. 1 to 5. Referring to FIG. 1, in one embodiment, the present invention provides a wireless local area network system 102 that maintains a connection, comprising: an input/output interface 1〇4 for a wireless local area network system 102 and a main system 10〇 Communicating; an antenna 106 for the wireless local area network system 1〇2 to be connected to a wireless access point log; and a processing unit 11〇 disposed in the wireless local area network system 1〇2, and /output interface 104 and media access control unit 112 are connected; wherein when the main system 1 is in an operating state, the main system 1 〇〇 controls the wireless local area network system 1 , 2, and wherein when the main system 100 enters standby or In the sleep state, the processing unit takes over the wireless local area network system 1〇2 to maintain the connection state between the wireless local area network system 112 and the wireless access point 108. In one embodiment, processing unit 110 can be implemented by a microprocessor/microcontroller. And, it is noted that although in FIG. 1, the processing unit 11 is disposed in the wireless local area network system 102, this is merely an exemplary embodiment and is not intended to limit the present invention. In addition, in an embodiment, the wireless local area network system 102 can also be disposed in the main system 100. At this time, the power supplied to the processing unit 110 can take the power that is always on in the autonomous system 1 ', for example, basic output input. The battery of the system (Basic Input Output System, April 29, pp. corrected replacement page BIOS). In addition, the wireless local area network system 102 shown in FIG. 1 can be designed to handle the wireless local area network system 102 when the main system 100 is powered off to maintain the wireless local area network system ι 2 and the wireless access point. The connection state between 〇8, and when the main system 1 is turned on, the main area system 1 controls the wireless local area network system 102. The wireless local area network system 102 of FIG. 1 further includes a radio frequency unit 116, a baseband unit 114, and a medium access control unit 112. As is known to those skilled in the art, the radio frequency unit 116 can be comprised of a Spread Spectrum Transceiver, a Low Noise Amplifier (LNA), a Mixer, a Dual Frequency Synthesizer, and a Power Amplifier ( The power Amplifier is configured to process the signal received by the antenna 1〇6, and then transmitted to the baseband unit 114, or the signal transmitted by the baseband unit 114, and then transmitted by the antenna 106. The baseband unit is used to decode/demodulate the signal transmitted by the frequency unit 114, or to encode/modulate the information transmitted by the medium access early element 112, for example, ieee 8〇2.11b 11Mbps The medium-modulation technology is CCK, and the modulation technique is OFDM in 8匪2 na. The necessary specification for IEEE 802.11g is 〇FDM, which can be compatible with IEEE 802.11b CCK modulation technology. The pbcc modulation technique proposed by CCK/OFDM or TI. The media access control unit 112 is used to control the overall transmission process of the signal. In addition, the baseband unit 114 and the medium access control unit 112 can be integrated on the same-wafer, or the fresh-eye unit 116, the baseband 114, and the medium access control unit 112 can be integrated into the design. On a wafer. In the first page of FIG. 1, the main system 100 includes a central processing unit (Cpu) iπ, and the central processing unit 118 is bridged by a north bridge chipset 12〇, and a graphics processing unit (GPU) 122. - Memory 124 and a South Bridge chipset 126 communicate. In general, the wireless local area network system 102 communicates with the host system 100 using the south bridge chipset 126 as a bridge. Therefore, the slave system number can be transmitted to the wireless area network system 102 through the south bridge chipset (3)' and by input/output; In this embodiment, if the main system 1 is in an operating state, the processing unit 110 can directly transmit the signal of the autonomous system to the media access control unit 112. In other embodiments, the wireless local area network system may further include a multiplex unit 230 (see FIG. 2). When the main system 10 is in an operating state, the signal from the antenna 106 or from the main system 100 is transmitted through the multiplex unit 230. The wireless local area network system 102 is passed without going through the processing unit 110. Continuing to refer to FIG. 1, a memory unit 128 is accessible to the processing unit 110. The memory unit 128 can store information about the wireless access point 108 and user information of the wireless local area network. In an embodiment, the memory unit 128 stores related information of the wireless access point that has been used and corresponding user information for use by the processing unit 110. Referring next to Figure 3, a method of maintaining a connection state of a wireless local area network system is illustrated. The wireless local area network system is disposed in a main system and can be connected to a wireless access point. The method includes the following steps: in step 302, a processing unit is provided, which can be a microprocessor/ a microcontroller; in step 304, when the primary system enters a standby or hibernation state, the processing unit takes over the wireless local area network system to maintain the connection state of the wireless local area network system; and in step 306, when the primary system is Call 10^July 2 9 '修'------ wake-up, the main system takes over the wireless local area network system. In addition, in an embodiment, when the step 304 and the step 3〇6, the processing unit takes over the wireless local area network system, and the connection state of the wireless local area network system; and when the main system is powered on, the main system takes over the wireless local area network system. . In the second embodiment, step 3〇2 further includes a providing-memory unit for processing the π access and providing the cryptosystem. The provided memory unit can be used for the library; use, : = no, take the relevant information of the point and the corresponding user information. The process of taking over the wireless local area network system by the processing unit of step 304 in this embodiment can further refer to the timing diagram of FIG. 4 in two steps. FIG. 4 illustrates a timing diagram between a main system 4 and a single page το41G. First, when the main system is 4. . Upon entering the standby or hibernation state, the main system 4〇〇 notifies the processing unit 41 that it will enter the standby or hibernation state (402); the processing unit 410 requests information about a wireless access point and user information of the wireless local area network ( 4〇4); the main system 400 will be related to the information of the wireless access point and the user information of the wireless local area network, such as the service identifier of the wireless access point (SSID), the user's wired equivalent encryption (wire (j Equivalent Privacy, WEP) and wireless application software protocol (wires) key or other information, transmitted to the processing unit 41〇, and stored in the memory unit (406); finally the main system 4〇〇 The enabling processing unit 410 takes over the wireless local area network system to enter the standby or hibernation state (408). Conversely, the process of the main system taking over the wireless local area network system of step 306 can be further referred to the timing diagram of Figure 5. First, the main The system checks the connection status of the wireless local area network system (5〇2) by processing the 10 1344768 April 29, 100 correction replacement page unit; the processing unit transmits the connection of the wireless local area network system. The line status is given to the main system (5〇4); the main system requests information about the wireless access point and the user information of the wireless local area network (506); the processing unit transmits information about the wireless access point and the wireless local area network The user information is transmitted to the main system (508) 'The last main system stops the action of the processing unit 410' and takes over the local area network module (51〇). Therefore, the above-mentioned memory unit accessed by the processing unit, except before storing the standby sleep The information code of the wireless storage secret code that is being continuously shot can also store the wireless access information that has been connected in the past, and store the corresponding user authorization code/password, etc., so that the main target, the standby machine moves. The towel, by the * processing unit access record = the user access mechanism of the different wireless access points obtained can also be transferred to the connection state. n - the above is only the preferred embodiment of the present invention It is not intended to limit; any other HI circumference that does not deviate from the disclosure of the present invention; change or dance 'should be included in the following application [simplified description of the drawings] Figure 1 is a diagram of maintaining a connection according to the present invention Specific embodiment, none A block diagram of a local area network system; 2 is a block diagram of a wireless local area network system in accordance with the present invention; and a 3D line is a maintenance embodiment according to an embodiment of the present invention. Wireless 11 1344768 April 29, 100 modifies a method of replacing the connection state of a page area network system; FIG. 4 is a timing diagram of a processing unit taking over a wireless local area network system according to an embodiment of the present invention; and FIG. In accordance with an embodiment of the present invention, the primary system takes over the timing diagram of the wireless local area network system. [Main Component Symbol Description] 100 Main System 102 Wireless Local Area Network System 104 Input/Output Interface 106 Antenna 108 Wireless Access Point 110 Processing Unit 112 Medium Access Control Unit 114 Base Frequency Unit 116 Radio Frequency Unit 118 Central Processing Unit 120 North Bridge 122 Graphics operation processor 124 memory 126 south bridge 128 memory unit 230 multiplex unit 12