201208418 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及通信技術，尤其涉及一種無線訪問節點及其 節省功耗之方法。 【先前技術】 [0002] 無線訪問節點（Access Point，AP)係用於無線網路之 無線交換機，其連接至對應之互聯網接入設備（通常係一 個交換機或者集線器及一個數據機），以向與其連接之無 線設傷，如無線網卡分配一個、1 P地址。無線訪問節點主 要基於IEEE 802. 1 1系列_編。目前，當沒有用戶籍由 無線訪問節點接入互聯網時，互聯網接入設備會自動進 入省電模式，然而，無線訪間節點仍然處於正常工作狀 態並且接收及發射無線訊號’造成了電源之浪費。 【發明内容】 [0003] 有鑒於此，有必要提供一種節省功耗之無線訪問節點及 其節省功耗之方法。 [0004]—種無線訪問節點，包括―彳固』用於發射及接收無線訊號 之射頻模塊、一個識別模塊及一個控制模塊。識別模塊 用於識別該射頻模塊有無接收到無線訊號以及接收到之 無線訊號係否符合IEEE 802. 1 1系列標準pCLp子層之數 據幀格式並產生一個結果。該控制模塊根據該結果使無 線訪問節點進入正常模式或省電模式。在省電模式下， 控制模塊控制該無線訪問節點僅接收無線訊號。 [0005] 099127060 一種無線訪問節點之節省功耗之方法，包括以下步驟： 設置一個無線訪問節點之省電模式，在該省電模式下， 表單編號A0101 第4頁/共15頁 0992047540-0 201208418 [0006] Ο [0007] [0008] ❹ [0009]201208418 VI. Description of the Invention: [Technical Field] The present invention relates to communication technologies, and in particular, to a wireless access node and a method for saving power consumption thereof. [Prior Art] [0002] A wireless access node (AP) is a wireless switch for a wireless network that is connected to a corresponding Internet access device (usually a switch or hub and a data machine) to The wireless connection with the connection, such as the wireless network card is assigned a 1 P address. The wireless access node is mainly based on the IEEE 802. 1 1 series _. At present, when no user accesses the Internet through the wireless access node, the Internet access device automatically enters the power saving mode. However, the wireless access node is still in a normal working state and receives and transmits the wireless signal, causing waste of power. SUMMARY OF THE INVENTION [0003] In view of the above, it is necessary to provide a wireless access node that saves power consumption and a method for saving power consumption thereof. [0004] A wireless access node includes a "tamping" radio frequency module for transmitting and receiving wireless signals, an identification module, and a control module. The identification module is configured to identify whether the radio module receives the wireless signal and whether the received wireless signal conforms to the data frame format of the IEEE 802.11 series standard pCLp sublayer and generates a result. The control module causes the wireless access node to enter a normal mode or a power saving mode based on the result. In the power saving mode, the control module controls the wireless access node to receive only wireless signals. [0005] 099127060 A method for saving power of a wireless access node, comprising the steps of: setting a power saving mode of a wireless access node, in the power saving mode, form number A0101, page 4 / total 15 pages 0992047540-0 201208418 [0006] [0008] ❹ [0009]
該無線訪問節點僅接收無線訊號；該無線訪問節點接收 無線訊號；若沒有接收到無線訊號或者所接收到之無線 訊號不符合IEEE 802. 1丨系列標準PCLp子層之數據幀格 式，該無線訪問節點進入省電模式；若所接收到之無線 訊號符合IEEE 802. 1 1系列標準PCLP子層之數據幀格式 ，該無線訪問節點進入正常模式。 與先前技術相比，本發明之無線訪問節點及其節省功耗 之方法設置了一個省電模式，在該省電模式下，該無線 訪問節點僅接收無線訊號，當該無線訊號符合I Egg 802. 1 1PCLP子層格式時，便可認為有無線設備正嘗試連 接到該無線訪問節點，此時該無線訪問節點才進入正常 模式。如此，節省了該無線訪問節點之功耗。 【實施方式】 下面將結合附圖’舉以下較佳實施方式並配合圖式詳細 描述如下。 請參考圖1及圖2 ’本發明較佳k實施方式之無線訪問節點 10包括一個射頻模塊12、一個識別-模塊14及一個控制模 塊1 6。 射頻模塊12用於發射及接收無線訊號。根據IEEE 802. 11系列標準’符合IEEE 802. 1 1系列標準之無線訊 號可工作在2. 4GHz頻段（如IEEE 802. lib，IEEE 802. llg，IEEE 802. llg/n 標準）或 5GHz 頻段（如 IEEE 802. 11a，IEEE 802. lla/n標準）。因此，射頻模塊12 僅發射及接收頻率為2· 4GHz或5GHz之無線訊號。被接收 到之無線訊號由射頻模塊12傳送至識別模塊14。 099127060 表單編號A0101 第5頁/共15頁 0992047540-0 201208418 [0010] IEEE 802. 1 1系列標準定義了媒體存取控制層（MediaThe wireless access node only receives the wireless signal; the wireless access node receives the wireless signal; if the wireless signal is not received or the received wireless signal does not conform to the data frame format of the IEEE 802.1 series standard PCLp sublayer, the wireless access The node enters a power saving mode; if the received wireless signal conforms to the data frame format of the IEEE 802.11 series standard PCLP sublayer, the wireless access node enters the normal mode. Compared with the prior art, the wireless access node of the present invention and the method for saving power thereof set a power saving mode, in which the wireless access node receives only wireless signals when the wireless signal conforms to I Egg 802. 1 1 PCLP sublayer format, it can be considered that a wireless device is trying to connect to the wireless access node, at this time the wireless access node enters the normal mode. In this way, the power consumption of the wireless access node is saved. [Embodiment] Hereinafter, the following preferred embodiments will be described in detail with reference to the accompanying drawings. Referring to Figures 1 and 2, a preferred embodiment of the present invention includes a radio frequency module 12, an identification module 14 and a control module 16. The radio frequency module 12 is configured to transmit and receive wireless signals. According to the IEEE 802.11 series of standards, the wireless signals conforming to the IEEE 802.11 series of standards can operate in the 2.4 GHz band (such as IEEE 802. lib, IEEE 802.11g, IEEE 802.11g/n standard) or the 5 GHz band ( Such as IEEE 802.11a, IEEE 802.11a/n standard). Therefore, the radio frequency module 12 only transmits and receives radio signals having a frequency of 2.4 GHz or 5 GHz. The received wireless signal is transmitted by the radio frequency module 12 to the identification module 14. 099127060 Form No. A0101 Page 5 of 15 0992047540-0 201208418 [0010] The IEEE 802.1 1 series of standards defines the Media Access Control Layer (Media).
Access Controller Layer，MAC 層）和物理層 (Physical Layer)。其中，物理層由物理層管理子層 、物理層彙聚（Physical Layer Convergence Procedure ， PLCP) 子層及物理介質依賴 （Physicai Medi_ um Dependent，PMD)子層構成。物理層管理子層為物 理層提供管理功能。PLCP子層用於對資料之格式進行映 射以使資料能在MAC層及PMD子層之間傳輸。PMD子層位 於PLCP子層下方並直接面向無線介質，用於對資料進行 調製和解調以使資料可籍由無槔方式進行發送和接收。 .. /......+. . ...... ： [0011] 谶別模塊14連接至射頻模塊12，用於識別射頻模塊12有 無接收到無線訊號及射頻模塊1 2所接收到之無線訊號係 否符合IEEE 802. 1 1系列標準pClp子層之數據幀格式， 並產生一個識別結果◊具體之，識別模塊14係一個包含 基頻處理器（Baseband Processor)之晶片，其中基頻 處理器對處於物理層之資料進行處理。識別模塊14根據 PMD子層標準對接收進來之無線訊蟫進行解調後，產生適 合被PMD子層傳送之調解資料，以使資料能在MAC層及 PMD子層之間傳輸。若該無線訊號符合IEEE 8〇2. u系列 軚準，則識別模塊14根據PCLP子層標準可對調解資料進 行資料之封包，而且被封包後之資料以前導訊號 (Preamble)、信頭（Header)及負載（payl〇ad)之數據 幀格式排列。其中，前導訊號作為一種訓練序列 (Training Sequence)去偵測該無線訊號源（如，無線 網卡）與無線訪問節點1()間之頻率偏移量，以更正兩者間 099127060 表單編號A0101 第6頁/共15頁 0992047540-0 201208418 Ο [0012] 之頻率偏移量’而達到頻率同步之目之。信頭包含了該 無線訊號源目前之二舰態，速料參數。負载則齡 無線訊號所要傳輸之内容之主體。調解資料被封包後才 進入到層。隨著無線訊號之接收，前導訊號將最先產 生。當識別模塊14識別到前導訊號符合IEEE 8〇2.u物 理層之PCLP子層之數據㈣式時，便認為該無線訊號係 該無線訊號源發出之請求連接無線訪問節點10之請求气 號，識別模塊u此時產生-個第—訊號。當識別模塊14 識別到射頻模塊12沒有接收到無線訊號或者所接收到之 無線訊號不符合IEEE 802‘ 11系列標準時，識別模塊14 不產生任何訊號。 Ο 控制模塊16連接至識別模塊14，用於根據識別模塊14產 生之識別結果使無線訪問節點10進入正常模式或省電模 式。在該省電模式下，控制模塊16控制無線訪問節點1〇 僅接收無線訊號。由於本實施方式中未列舉無線訪問節 點10中之所有晶片或模塊，因此，類炽個人電腦處於睡 眠狀態，所定義之省電模式泛指無線訪問節點1〇之其他 與接收無線訊號無關之模塊（圖未示）處於省電處於睡眠 狀態或關閉狀態，從而降低無線訪問節點1 〇之功耗。但 可以理解，該省電模式下不僅限於關閉射頻模塊之發射 功能。具體地，當無線訪問節點10處於省電模式，而且 識別模塊14未產生任何訊號時，控制模塊16使無線訪問 節點10保持省電模式。當無線訪問節點1〇處於省電模式 ，而且識別模塊14產生一個第一訊號時，控制模塊16根 據該第一訊號使無線訪問節點1 〇進入正常模式，以繼續 099127060 表單編號A010I 第7頁/共15頁 0992047540-0 201208418 接收符合IEEE 802. 1 1系列標準之無線訊號至該無線訊 號結束。當無線訪問節點10處於正常模式，而且識別模 塊14未產生任何訊號時，控制模塊16使無線訪問節點10 進入省電模式。當無線訪問節點10處於正常模式，而且 識別模塊14產生一個第一訊號時，控制模塊16根據該第 一訊號使無線訪問節點10保持正常模式，以繼續接收符 合IEEE 802. 1 1系列標準之無線訊號至該無線訊號結束 〇 [0013] 本發明之無線訪問節點10設置了 一個省電模式，在該省 電模式下，無線訪問節點10關閉其他與接收無線訊號無 關之模塊，並且不向外發出無線訊號，而僅接收無線訊 號。由於其他無線設備需連接無線訪問節點10時必須先 發出一個無線訊號以請求連接無線訪問節點1〇，因此， 無線訪問節點10在省電模式下僅接收無線訊號並不影響 其他無線設備對無線訪問節點10之連接。因此，該省電 模式之設置節省了無線訪問節點10之功耗。同時，由於 PCLP子層係最先產生具有數據幀格式之子層，而數據幀 格式產生後便可識別其係否符合IEEE 80 2. 1 1系列標準 ，因此在PCLP子層處進行識別節省了識別所需之時間， 也同時降低了識別模塊104之運算量。 [0014] 優選地，無線訪問節點1 0包括一個延時模塊1 8。延時模 塊18連接在識別模塊14與控制模塊16之間，用於判斷在 一個預設時間内識別模塊14係否有產生第一訊號，若無 ，則使控制模塊控制無線訪問節點10從正常模式進入省 電模式。若有，則在收到第一訊號後重新計時。該延時 099127060 表單編號A0101 第8頁/共15頁 0992047540-0 201208418 [0015] [0016] [0017]Ο [0018] [0019] [0020]❹ 099127060 模塊18之設置，可避免無線訪問節點Π)頻繁變化工作棋 式。 、 請結合圖2，本發日她佳實施方式之無線訪問節點之節省 功耗之方法包括以下步驟： S"設置-個無線訪問節點之省電模式，在該省 下，該無線訪問節點僅接收無線訊號；具體地，叙線: 問節點僅接收解為2.4GHz及5GHz之無線訊號。 S 2 :該無線訪問節點接收無線訊號。 53 :若沒有接收_線訊料者所接㈣之無線訊號不 符合IEEE謝上系列標準PCLp子層之數據式該 無線訪問節點進入省電模式。 ^ 54 ··若所接收到之無線訊號符合IEEE 8〇2 u系列標準 PCLP子層之數據幀格式，該無線訪問節點進入正常模式 〇 具體地’若沒有接收到無線訊號，該無線訪問節點進入 省電模式。若有接親到無線訊號，該無線訪問節點對接 收到之無線訊號進行解調及資料之封包。當被調解及封 包後之資料產生了符合IEEE 802. 1 1物理層之PCLP子層 之數據幀格式之前導訊號時，認為該無線訊號符合IEEE 802. 1 1物理層之PCLP子層之數據幀格式，該無線訪問節 點進入正常模式以繼續接收符合IEEE 802. 1 1系列標準 之無線訊號至該無線訊號結束。否則認為該無線訊號不 符合IEEE 802. 1 1物理層之PCLP子層之數據幀格式，該 無線訪問節點進入省電模式。 表單編號A0101 第9頁/共15頁 0992047540-0 201208418 [0021] 優選地，在該無線訪問節點進入省電模式之前，判斷係 否延時了 一個預設時間，若係，該無線訪問節點才進入 省電模式，若否，繼續判斷係否有接收到無線訊號或者 所接收到之無線訊號係否符合IEEE 802. 1 1系列標準 PCLP子層之數據幀格式。 [0022] 本技術領域的普通技術人員應當認識到，以上之實施方 式僅係用來說明本發明，而並非用作為對本發明之限定 ，只要在本發明之實質精神範圍之内，對以上實施例所 作的適當改變和變化都落在本發明要求保護的範圍之内 〇 【圖式簡單說明】 [0023] 圖1為本發明較佳實施方式之無線訪問節點之模塊示意圖 〇 [0024] 圖2為本發明較佳實施方式之無線訪問節點之節省功耗之 方法之流程圖。 【主要元件符號說明】 [0025] 無線訪問節點1 0 [0026] 射頻模塊 12 [0027] 識別模塊 14 [0028] 控制模塊 16 [0029] 延時模塊 18 099127060 表單編號A0101 第10頁/共15頁 0992047540-0Access Controller Layer, MAC layer) and Physical Layer. The physical layer is composed of a physical layer management sublayer, a Physical Layer Convergence Procedure (PLCP) sublayer, and a Physicai Medium Dependent (PMD) sublayer. The physical layer management sublayer provides management functions for the physical layer. The PLCP sublayer is used to map the format of the data so that the data can be transferred between the MAC layer and the PMD sublayer. The PMD sublayer is located below the PLCP sublayer and directly faces the wireless medium for modulating and demodulating the data so that the data can be transmitted and received in an innocent manner. .. /......+. . . . : [0011] The screening module 14 is connected to the radio frequency module 12 for identifying whether the radio frequency module 12 receives the wireless signal and receives the radio frequency module 12 Whether the wireless signal conforms to the data frame format of the IEEE 802.11 series standard pClp sublayer, and generates a recognition result. Specifically, the identification module 14 is a chip including a baseband processor, wherein the base The frequency processor processes the data at the physical layer. The identification module 14 demodulates the incoming wireless signal according to the PMD sub-layer standard to generate mediation data suitable for transmission by the PMD sub-layer so that the data can be transmitted between the MAC layer and the PMD sub-layer. If the wireless signal complies with the IEEE 8〇2. u series, the identification module 14 can encapsulate the data of the mediation data according to the PCLP sub-layer standard, and the information of the packaged information is Preamble and Header. And the data frame format of the load (payl〇ad). The preamble signal is used as a training sequence to detect the frequency offset between the wireless signal source (eg, the wireless network card) and the wireless access node 1 () to correct the difference between the two. 099127060 Form No. A0101 No. 6 Page / Total 15 pages 0992047540-0 201208418 Ο [0012] The frequency offset 'to achieve the purpose of frequency synchronization. The letterhead contains the current state of the wireless signal source, the fast material parameters. Load age The subject of the content to be transmitted by the wireless signal. The mediation data is encapsulated before entering the layer. As the wireless signal is received, the preamble will be generated first. When the identification module 14 recognizes that the preamble signal conforms to the data (4) of the PCLP sublayer of the IEEE 8〇2.u physical layer, it considers that the wireless signal is a request air number from the wireless signal source requesting to connect to the wireless access node 10, The identification module u generates a -th signal at this time. When the identification module 14 recognizes that the radio frequency module 12 has not received the wireless signal or the received wireless signal does not comply with the IEEE 802 '11 series of standards, the identification module 14 does not generate any signal. The Ο control module 16 is coupled to the identification module 14 for causing the wireless access node 10 to enter a normal mode or a power saving mode based on the recognition results generated by the identification module 14. In the power save mode, the control module 16 controls the wireless access node 1 to receive only wireless signals. Since all the chips or modules in the wireless access node 10 are not listed in the embodiment, the incandescent personal computer is in a sleep state, and the defined power saving mode generally refers to other modules of the wireless access node 1 that are not related to receiving wireless signals. (not shown) is in a sleep state or off state, thereby reducing the power consumption of the wireless access node 1 . However, it can be understood that the power saving mode is not limited to turning off the transmitting function of the radio frequency module. Specifically, when the wireless access node 10 is in the power save mode and the identification module 14 does not generate any signals, the control module 16 causes the wireless access node 10 to maintain the power save mode. When the wireless access node 1 is in the power saving mode, and the identification module 14 generates a first signal, the control module 16 causes the wireless access node 1 to enter the normal mode according to the first signal to continue 099127060 Form No. A010I Page 7 / A total of 15 pages 0992047540-0 201208418 Receive wireless signals complying with the IEEE 802. 1 1 series standard until the end of the wireless signal. When the wireless access node 10 is in the normal mode and the identification module 14 does not generate any signals, the control module 16 causes the wireless access node 10 to enter a power save mode. When the wireless access node 10 is in the normal mode and the identification module 14 generates a first signal, the control module 16 maintains the wireless access node 10 in the normal mode according to the first signal to continue to receive the wireless conforming to the IEEE 802.11 series of standards. Signal to the end of the wireless signal [0013] The wireless access node 10 of the present invention sets a power saving mode in which the wireless access node 10 turns off other modules not related to receiving wireless signals, and does not issue outwards. Wireless signal, but only receive wireless signals. Since the other wireless device needs to connect to the wireless access node 10, it must first send a wireless signal to request to connect to the wireless access node. Therefore, the wireless access node 10 only receives the wireless signal in the power saving mode and does not affect the wireless access of other wireless devices. The connection of node 10. Therefore, the setting of the power saving mode saves the power consumption of the wireless access node 10. At the same time, since the PCLP sub-layer first generates a sub-layer with a data frame format, and the data frame format can be identified to conform to the IEEE 80 2.1 1 series standard, identification at the PCLP sub-layer saves recognition. The required time also reduces the amount of computation of the identification module 104. [0014] Preferably, the wireless access node 10 includes a delay module 18. The delay module 18 is connected between the identification module 14 and the control module 16 for determining whether the identification module 14 generates the first signal within a predetermined time. If not, the control module controls the wireless access node 10 from the normal mode. Enter the power saving mode. If so, re-clock after receiving the first signal. The delay 099127060 Form No. A0101 Page 8 / Total 15 Page 0992047540-0 201208418 [0016] [0017] [0020] [0020] ❹ 099127060 Module 18 is set to avoid wireless access to the node Π) Change the working chess style frequently. Referring to FIG. 2, the method for saving power consumption of the wireless access node of the preferred embodiment of the present invention includes the following steps: S"Setting a power saving mode of a wireless access node, in which the wireless access node only Receiving a wireless signal; specifically, the line: The requesting node only receives wireless signals that are resolved to 2.4 GHz and 5 GHz. S 2 : The wireless access node receives the wireless signal. 53: If the wireless signal received by the receiver (4) is not in compliance with the data format of the IEEE Standard PCLp sublayer, the wireless access node enters the power saving mode. ^ 54 · If the received wireless signal conforms to the data frame format of the IEEE 8〇2 u series standard PCLP sublayer, the wireless access node enters the normal mode, specifically 'if no wireless signal is received, the wireless access node enters Power saving mode. If there is a wireless signal, the wireless access node demodulates the received wireless signal and decapsulates the data. When the data after mediation and encapsulation generates a data frame format preamble corresponding to the PCLP sublayer of the IEEE 802.1 1 physical layer, the radio signal is considered to conform to the data frame of the PCLP sublayer of the IEEE 802.1 1 physical layer. In the format, the wireless access node enters a normal mode to continue receiving wireless signals conforming to the IEEE 802.1 1 series standard until the wireless signal ends. Otherwise, the wireless signal is considered not to conform to the data frame format of the PCLP sublayer of the IEEE 802.1 1 physical layer, and the wireless access node enters the power saving mode. Form No. A0101 Page 9 of 15 0992047540-0 201208418 [0021] Preferably, before the wireless access node enters the power saving mode, it is determined whether the preset time is delayed, and if so, the wireless access node enters The power saving mode, if not, continues to determine whether the wireless signal is received or whether the received wireless signal conforms to the data frame format of the IEEE 802.11 series standard PCLP sublayer. [0022] Those skilled in the art should understand that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention as long as the scope of the present invention is The appropriate changes and variations are within the scope of the claimed invention. [FIG. 1 is a block diagram of a wireless access node in accordance with a preferred embodiment of the present invention. [0024] FIG. A flowchart of a method for saving power of a wireless access node in accordance with a preferred embodiment of the present invention. [Main Component Symbol Description] [0025] Wireless Access Node 1 [0026] Radio Frequency Module 12 [0027] Identification Module 14 [0028] Control Module 16 [0029] Delay Module 18 099127060 Form Number A0101 Page 10 of 15 0992047540 -0