TWI663886B - A Method of Wireless Communication and A Wireless Communication Device - Google Patents
A Method of Wireless Communication and A Wireless Communication Device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
本發明提供一種無線通訊方法，該方法包括：產生包含第一組喚醒信號的封包，其中產生所述封包包括：為所述第一組喚醒信號中的每一個分配第一頻率通道的子通道；使用開/關鍵控OOK調製對所述第一組喚醒信號進行調製，其中，所述第一組喚醒信號中的每一個用於啟動位於第一組無線通訊設備的相應無線通訊設備中的主無線收發裝置；通過使用頻分多址FDMA發送所述封包，其中所述第一組喚醒信號中的每一個是通過所述第一頻率通道的相應子通道發送的。 The invention provides a wireless communication method, the method comprising: generating a packet including a first group of wake-up signals, wherein generating the packet includes: allocating a sub-channel of a first frequency channel to each of the first group of wake-up signals; The on / off keyed OOK modulation is used to modulate the first set of wake-up signals, wherein each of the first set of wake-up signals is used to activate a master wireless in a corresponding wireless communication device of the first group of wireless communication devices. Transceiving device; sending the packet by using frequency division multiple access FDMA, wherein each of the first set of wake-up signals is sent through a corresponding subchannel of the first frequency channel.
Description
本發明總體涉及網路通信技術領域，特別涉及無線通訊的通信協議領域。 The present invention generally relates to the field of network communication technology, and particularly to the field of communication protocols for wireless communication.
無線區域網路(Wireless Local Area Network,WLAN)和移動通信設備變得越來越普及，例如智慧手機，可穿戴設備，各種感測器，物聯網(Internet of Thing,IoT)設備等等。可攜帶需求限制了通信設備的整體尺寸，這種通信設備典型的由有限充電容量的內置電池供電。通信設備的大部分工作量可以由通信驅動，由於無線收發裝置需要保持運行以確保及時的回應資料通信請求，所以該無線收發裝置是主要的功率消耗源。 Wireless Local Area Network (WLAN) and mobile communication devices are becoming more and more popular, such as smart phones, wearable devices, various sensors, Internet of Thing (IoT) devices, and so on. The need for portability limits the overall size of communication devices, which are typically powered by a built-in battery with limited charging capacity. Most of the workload of communication equipment can be driven by communication. Since the wireless transceiver needs to keep running to ensure timely response to data communication requests, the wireless transceiver is the main source of power consumption.
為了減少由於無線收發裝置的功率損耗，一些通信設備包括主無線收發裝置和低功率喚醒無線收發裝置(Wake-Up Radio,WUR)。當不涉及資料通信任務時，主無線收發裝置能被配置在節能狀態，例如，睡眠狀態或者甚至被關閉。另一方面，低功率喚醒無線收發裝置WUR保持活動，並且在任何時候WUR接收指向主無線收發裝置的資料通信請求時，WUR運作來啟動主無線收發裝置，該資料通信請求例如可以是WI-FI接入點(AP)發送的喚醒信號形式。 In order to reduce the power loss due to the wireless transceiver, some communication equipment includes a main wireless transceiver and a low-power wake-up radio (WUR). When no data communication task is involved, the master wireless transceiver can be configured in a power-saving state, such as a sleep state or even turned off. On the other hand, the low-power wake-up wireless transceiver WUR remains active, and whenever the WUR receives a data communication request directed to the main wireless transceiver, the WUR operates to start the main wireless transceiver. The data communication request can be, for example, WI-FI The form of wake-up signal sent by the access point (AP).
與具有高速率資料通信能力和複雜處理功能的主無線收發裝置相比，WUR具有低成本和低功率損耗，但仍然足以接收和處理喚醒信號，並相應的喚醒主無線收發裝置。例如，WUR的額定電力消耗能是0.5-1mW或者甚至更 少。 Compared with the main wireless transceiver with high-speed data communication capabilities and complex processing functions, WUR has low cost and low power loss, but it is still sufficient to receive and process wake-up signals, and wake the main wireless transceiver accordingly. For example, the rated power consumption of WUR is 0.5-1mW or even more less.
IEEE802.11標準組織為WLAN定義技術標準。最新的IEEE802.11標準採用了多用戶(Multi-user,MU)通信機制，例如多用戶多輸入多輸出(Multi-User Multiple-Input Multiple-Output,MU-MIMO)和正交頻分多址(Orthogonal Frequency-Division Multiple Access,OFDMA)。然而，缺少在發送器和複數個WUR接收器之間同步啟用喚醒信號的通信的多使用者MU傳輸機制。 The IEEE802.11 standards organization defines technical standards for WLANs. The latest IEEE802.11 standard uses multi-user (MU) communication mechanisms, such as Multi-User Multiple-Input Multiple-Output (MU-MIMO) and Orthogonal Frequency Division Multiple Access (MU-MIMO) Orthogonal Frequency-Division Multiple Access (OFDMA). However, a multi-user MU transmission mechanism that synchronously enables communication of wake-up signals between a transmitter and a plurality of WUR receivers is lacking.
本發明一實施例提供一種無線通訊方法，該方法包括：產生包含第一組喚醒信號的封包，其中所述產生包含第一組喚醒信號的封包的步驟包括：為所述第一組喚醒信號中的每一個分配第一頻率通道的子通道；使用開/關鍵控OOK調製對所述第一組喚醒信號進行調製，其中，所述第一組喚醒信號中的每一個用於啟動位於在第一組無線通訊設備的相應無線通訊設備中的主無線收發裝置；通過使用頻分多址FDMA發送所述封包，其中所述第一組喚醒信號中的每一個是通過所述第一頻率通道的相應子通道發送的。 An embodiment of the present invention provides a wireless communication method. The method includes: generating a packet including a first group of wake-up signals, wherein the step of generating a packet including the first group of wake-up signals includes: Each of the sub-channels of the first frequency channel is allocated; the first group of wake-up signals are modulated using on / off keyed OOK modulation, wherein each of the first group of wake-up signals is used to start A primary wireless transceiver in a corresponding wireless communication device of a group of wireless communication devices; sending the packet by using frequency division multiple access FDMA, wherein each of the first group of wake-up signals is a corresponding one through the first frequency channel Sub-channel sent.
本發明另一實施例提供一種無線通訊方法，該方法包括：為第一組喚醒信號分配第一頻率通道的特定子通道；其中所述第一組喚醒信號包括一個或者多個喚醒信號；為第二組喚醒信號分配第二頻率通道的特定子通道；其中所述第二組喚醒信號包括一個或者多個喚醒信號；使用開/關鍵控OOK調製對所述第一組喚醒信號和第二組喚醒信號進行調製，其中，所述第一組喚醒信號中的每一個用於啟動位於在第一組無線通訊設備的相應無線通訊設備中的主無線收發裝置；所述第二組喚醒信號中的每一個用於啟動位於在第二組無線通訊設備的相應無線通訊設備中的主無線收發裝置；通過使用頻分多址FDMA發送包含所述第一組喚醒信號和所述第二組喚醒信號的封包，其中所述第一組喚醒信號 中的每一個是通過所述第一頻率通道的特定子通道發送的，所述第二組喚醒信號中的每一個是通過所述第二頻率通道的特定子通道發送的。 Another embodiment of the present invention provides a wireless communication method. The method includes: allocating a specific subchannel of a first frequency channel to a first group of wake-up signals; wherein the first group of wake-up signals includes one or more wake-up signals; Two sets of wake-up signals are assigned to specific sub-channels of the second frequency channel; wherein the second set of wake-up signals includes one or more wake-up signals; using on / off keyed OOK modulation to wake up the first set of wake-up signals and the second set Signals are modulated, wherein each of the first group of wake-up signals is used to activate a master wireless transceiver device located in a corresponding wireless communication device of the first group of wireless communication devices; each of the second group of wake-up signals A primary wireless transceiver for activating a corresponding wireless communication device located in a corresponding wireless communication device of a second group of wireless communication devices; sending a packet containing the first group of wake-up signals and the second group of wake-up signals by using frequency division multiple access FDMA Where the first set of wake-up signals Each of them is sent through a specific sub-channel of the first frequency channel, and each of the second set of wake-up signals is sent through a specific sub-channel of the second frequency channel.
本發明又一實施例提供一種無線通訊設備，該方法包括：記憶體，與所述記憶體耦接的處理器；以及收發器，與所述記憶體耦接，其中所述收發器用於產生包括第一組喚醒信號的封包，所述產生包括第一組喚醒信號的封包通過以下方式執行：為所述第一組喚醒信號中的每一個分配第一頻率通道的子通道；以及使用OOK調製對所述第一組喚醒信號進行調製，其中所述第一組喚醒信號中的每一個用於啟動位於第一組無線通訊設備的相應無線通訊設備中的主無線收發裝置；以及收發器，用於通過使用FDMA發送所述封包，其中所述第一組喚醒信號中的每一個是通過所述第一頻率通道的相應子通道發送的。 Another embodiment of the present invention provides a wireless communication device. The method includes: a memory, a processor coupled to the memory; and a transceiver coupled to the memory, wherein the transceiver is configured to generate Generating a packet of a first set of wake-up signals, the generating of a packet including the first set of wake-up signals is performed by: allocating a sub-channel of a first frequency channel to each of the first set of wake-up signals; and using an OOK modulation pair The first set of wake-up signals are modulated, wherein each of the first set of wake-up signals is used to activate a main wireless transceiver device located in a corresponding wireless communication device of the first group of wireless communication devices; and a transceiver for The packet is transmitted by using FDMA, wherein each of the first set of wake-up signals is transmitted through a corresponding subchannel of the first frequency channel.
本發明又一實施例提供一種無線通訊設備，該方法包括：記憶體，處理器；以及主無線收發裝置，用於在操作模式中發送和接收資料封包；以及喚醒無線收發裝置，與所述主無線收發裝置耦接，並且包括OOK檢測器，其中所述喚醒無線收發裝置用於：接收封包，所述封包包括使用OOK調製的喚醒信號，其中，所述封包包括用FDMA發送的第一組喚醒信號，其中所述第一組喚醒信號被指向第一組無線通訊設備；以及根據所述封包中的喚醒信號產生喚醒指示，其中所述喚醒指示用於指示所述主無線收發裝置從低功率模式中退出並進入所述操作模式。 Still another embodiment of the present invention provides a wireless communication device, the method includes: a memory, a processor; and a main wireless transceiver device for sending and receiving data packets in an operation mode; and awake the wireless transceiver device to communicate with the host The wireless transceiving device is coupled and includes an OOK detector, wherein the wake-up wireless transceiving device is configured to receive a packet including a wake-up signal using OOK modulation, wherein the packet includes a first set of wake-up signals sent using FDMA A signal, wherein the first group of wake-up signals are directed to the first group of wireless communication devices; and a wake-up instruction is generated according to the wake-up signal in the packet, wherein the wake-up instruction is used to instruct the master wireless transceiver device from a low power mode To exit and enter the operating mode.
相應的，本文揭示的系統通過使發送器發送單個喚醒封包來啟動WLAN中的複數個通信設備上的主無線收發裝置，以提供用於有效喚醒信號的通信的協定。協定使用用於喚醒信號的單個調製機制和低干擾頻寬分配機制，其有助於WUR的低成本和低功率設計。 Accordingly, the system disclosed herein enables the master wireless transceiver on a plurality of communication devices in the WLAN by sending a single wake-up packet to provide a protocol for effective wake-up signal communication. The agreement uses a single modulation mechanism and a low interference bandwidth allocation mechanism for the wake-up signal, which helps WUR's low cost and low power design.
本發明實施例使用FDMA在單個封包中傳輸複數個喚醒信號到複數個接收設備的喚醒無線收發裝置(wake-up radio，WUR)，其中喚醒信號使用開 /關鍵控(ON/OFF key，OOK)調製來調製。根據本發明實施例的WUR在窄帶中操作。在多使用者喚醒封包中，頻率通道能被分成幾個子通道，用於使用FDMA發送複數個喚醒信號。例如，20MHz頻寬的頻率通道能攜帶指向兩個接收器設備的兩個或者三個OOK喚醒信號，並且每一個喚醒信號佔用特定的4MHz子通道，這可以通過之前與發送設備的協商過程確定。簡單的OOK調製和使用FDMA發送有助於提高發送喚醒信號的頻譜使用效率。 The embodiment of the present invention uses FDMA to transmit a plurality of wake-up signals in a single packet to a wake-up radio (WUR) of a plurality of receiving devices. / ON / OFF key (OOK) modulation to modulate. The WUR according to an embodiment of the present invention operates in a narrow band. In a multi-user wake-up packet, the frequency channel can be divided into several sub-channels for sending multiple wake-up signals using FDMA. For example, a frequency channel with a bandwidth of 20 MHz can carry two or three OOK wake-up signals directed to two receiver devices, and each wake-up signal occupies a specific 4 MHz sub-channel, which can be determined through a previous negotiation process with the sending device. Simple OOK modulation and the use of FDMA transmission can help improve the efficiency of spectrum usage for sending wake-up signals.
兩個鄰近的喚醒信號被特定頻率間隔充分的隔開，以減少鄰近通道干擾(Adjacent Channel Interference,ACI)，例如，頻率間隔是4MHz或者2MHz。減少的ACI有助於降低WUR中類比基帶濾波器的性能需求，導致電路設計簡化，開發和製造成本降低。 Two adjacent wake-up signals are sufficiently separated by a specific frequency interval to reduce adjacent channel interference (Adjacent Channel Interference, ACI), for example, the frequency interval is 4MHz or 2MHz. Reduced ACI helps reduce the performance requirements of analog baseband filters in WUR, resulting in simplified circuit design and reduced development and manufacturing costs.
一旦在接收器設備上的WUR接收封包，該WUR將OOK喚醒信號轉換成喚醒指示來喚醒主無線收發裝置，以進行資料通信。這不需要頻繁的喚醒主無線收發裝置來檢查是否存在任何資料通信任務，隨之的相關功率損耗被減少。而且，由於發送單個封包能喚醒複數個通信設備，在WLAN中有助於減少發送和處理喚醒信號的平均延遲。 Once the WUR on the receiver device receives the packet, the WUR converts the OOK wake-up signal into a wake-up instruction to wake up the master wireless transceiver for data communication. This does not require frequent wake-up of the main wireless transceiver to check whether there is any data communication task, and the associated power loss is reduced. Moreover, since sending a single packet can wake up multiple communication devices, it helps to reduce the average delay in sending and processing wake-up signals in a WLAN.
在一些例子中，MU喚醒封包可以包括一系列的複數個喚醒信號，該複數個喚醒信號使用相同的子通道發送並且在時域中是級聯(cascade)的。除了OOK喚醒信號，資料幀也被包含在MU喚醒封包中並且該資料幀被指向一接收器設備且該接收器設備的主無線收發裝置已處於工作狀態。可選的，可以在相同子通道上的連續喚醒信號之間***重配置視窗。 In some examples, the MU wake-up packet may include a series of a plurality of wake-up signals, which are sent using the same sub-channel and are cascaded in the time domain. In addition to the OOK wake-up signal, the data frame is also included in the MU wake-up packet and the data frame is directed to a receiver device and the main wireless transceiver of the receiver device is already in a working state. Optionally, a reconfiguration window can be inserted between consecutive wake-up signals on the same subchannel.
在一些例子中，MU喚醒封包包括傳統前導(legacy preamble)，用於防止傳統設備在喚醒封包的傳輸期間發送信號。 In some examples, the MU wake-up packet includes a legacy preamble to prevent legacy devices from sending signals during transmission of the wake-up packet.
由於發送設備中的收發器通常需要從產生一個喚醒信號的波形到產生另一個喚醒信號的重置(resettle)時間，和從產生前導的波形到產生喚醒信號 的波形的重置時間，可以在時域中不同類型的波形之間***重配置視窗，例如在傳統前導與喚醒信號之間***一重配置視窗，和/或，在兩個喚醒信號之間***作為一重配置視窗的間隔視窗。 Because the transceiver in the transmitting device usually needs the reset time from the generation of the waveform of one wake-up signal to the generation of another wake-up signal, and from the generation of the leading waveform to the generation of the wake-up signal Reset time of the waveform, you can insert a reconfiguration window between different types of waveforms in the time domain, such as inserting a reconfiguration window between the traditional preamble and the wake-up signal, and / or, inserting between the two wake-up signals as Spacer window for a reconfiguration window.
以上內容是一概述，該概述僅是說明性的，並不意圖以任何方式進行限制。如由請求項所限定的本發明的發明特徵和優點將在以下闡述的非限制性的詳細描述中變得顯而易見。 The above is an overview, which is merely illustrative and is not intended to be limiting in any way. The inventive features and advantages of the invention as defined by the claims will become apparent in the non-limiting detailed description set forth below.
100‧‧‧WLAN 100‧‧‧WLAN
111‧‧‧MU喚醒封包 111‧‧‧MU wake-up packet
110‧‧‧AP 110‧‧‧AP
120‧‧‧STA1 120‧‧‧STA1
130‧‧‧STA2 130‧‧‧STA2
140‧‧‧STAn 140‧‧‧STAn
200‧‧‧MU喚醒封包 200‧‧‧MU wake-up packet
210‧‧‧傳統前導 210‧‧‧ traditional leader
220‧‧‧SU喚醒封包 220‧‧‧SU wake-up packet
211，212‧‧‧喚醒信號 211, 212‧‧‧ wake-up signal
300‧‧‧MU喚醒封包 300‧‧‧MU wake-up packet
311‧‧‧子通道 311‧‧‧Sub-channel
400‧‧‧MU喚醒封包 400‧‧‧MU wake-up packet
411‧‧‧HE前導 411‧‧‧HE Leader
412‧‧‧喚醒信號 412‧‧‧ wake-up signal
413‧‧‧資料幀 413‧‧‧data frame
510‧‧‧MU喚醒封包 510‧‧‧MU wake-up packet
511‧‧‧傳統前導 511‧‧‧ traditional leader
514‧‧‧重配置視窗 514‧‧‧Reconfiguration window
512，513‧‧‧喚醒信號 512, 513‧‧‧ wake-up signal
520‧‧‧MU喚醒封包 520‧‧‧MU wake-up packet
521‧‧‧傳統前導 521‧‧‧ traditional leader
524‧‧‧保護符號 524‧‧‧Protection symbol
522,523‧‧‧喚醒信號 522,523‧‧‧ wake-up signal
525‧‧‧間隔視窗 525‧‧‧ interval window
611，612‧‧‧子通道 611,612‧‧‧Sub-channel
800‧‧‧過程 800‧‧‧ process
801，802，803，804‧‧‧步驟 801, 802, 803, 804 ‧‧‧ steps
850‧‧‧發送器模組 850‧‧‧ transmitter module
860，870，880‧‧‧處理路徑 860, 870, 880‧‧‧ processing path
861‧‧‧OOK基帶電路 861‧‧‧OOK baseband circuit
862‧‧‧脈衝整形電路 862‧‧‧pulse shaping circuit
863‧‧‧數位混頻電路 863‧‧‧Digital Mixing Circuit
881‧‧‧加法器 881‧‧‧ Adder
882‧‧‧DAC 882‧‧‧DAC
900‧‧‧過程 900‧‧‧ process
901，902，903，904，905，906，907‧‧‧步驟 901, 902, 903, 904, 905, 906, 907‧‧‧ steps
950‧‧‧WUR 950‧‧‧WUR
951‧‧‧自動增益控制器 951‧‧‧Automatic Gain Controller
952‧‧‧RF本地振盪器 952‧‧‧RF local oscillator
953‧‧‧混頻器 953‧‧‧Mixer
954‧‧‧LPF 954‧‧‧LPF
955‧‧‧ADC 955‧‧‧ADC
956‧‧‧OOK信號檢測器 956‧‧‧OOK signal detector
1000‧‧‧通信設備 1000‧‧‧ communication equipment
1030‧‧‧主處理器 1030‧‧‧ main processor
1020‧‧‧記憶體 1020‧‧‧Memory
440‧‧‧收發器 440‧‧‧ Transceiver
1021‧‧‧喚醒管理器 1021‧‧‧Wake up manager
1041‧‧‧OOK基帶模組 1041‧‧‧OOK baseband module
1042‧‧‧脈衝整形模組 1042‧‧‧Pulse Shaping Module
1043‧‧‧數位混頻模組 1043‧‧‧Digital Mixing Module
1044‧‧‧發送先入先出模組 1044‧‧‧Send FIFO module
1046‧‧‧編碼器 1046‧‧‧ Encoder
1045‧‧‧擾頻器 1045‧‧‧Scrambler
1048‧‧‧交織器 1048‧‧‧ Interleaver
1049‧‧‧IDFT 1049‧‧‧IDFT
1050‧‧‧保護間隔和視窗***模組 1050‧‧‧ guard interval and window insertion module
結合附圖閱讀下面的詳細描述，將更好地理解本發明的實施例，其中相同的附圖標記表示相同的元件。 Embodiments of the present invention will be better understood by reading the following detailed description in conjunction with the accompanying drawings, wherein the same reference numerals denote the same elements.
第1圖是本發明實施例提供的示例性的WLAN，在該示例性的WLAN中AP能發送MU喚醒封包以喚醒複數個非AP站點(station,STA)的主無線收發裝置；第2圖是本發明實施例提供的用於攜帶複數個喚醒信號和單個喚醒信號的MU喚醒封包的示例性格式；第3圖是本發明實施例提供的用FDMA發送的包含時域上級聯的OOK喚醒信號的MU喚醒封包的示例性格式；第4圖是本發明實施例提供的攜帶OOK調製的喚醒信號的示例性MU喚醒封包的格式；第5A圖是本發明實施例提供的MU喚醒封包的示例性格式，該MU喚醒封包包括在傳統前導和指向(directed to)兩個接收方站點(STA)的OOK喚醒信號之間***的重配置視窗；第5B圖是本發明實施例提供的MU喚醒封包的示例性格式，該MU喚醒封包包括在OOK喚醒信號之間***的間隔視窗(也可以稱為間隔符號)和在傳統前導 和OOK喚醒信號序列之間***的保護符號(spoof symbol)；第6A圖和第6B圖是本發明實施例提供的用於在MU喚醒封包中以FDMA發送複數個OOK喚醒信號的頻率子通道的示例性複用機制；第7A圖和第7B圖是本發明實施例提供的在MU喚醒封包中傳輸OOK喚醒信號的示例性頻帶使用；第8A圖是本發明實施例提供的發送MU喚醒封包的示例性過程的流程圖；第8B圖是本發明實施例提供的示例性的發送模組，該發送模組用於產生在MU喚醒封包中所包含的複數個喚醒信號的波形；第9A圖是本發明實施例提供的回應於包含在MU喚醒封包中的喚醒信號，喚醒STA的非活動的主無線收發裝置的示例性過程的流程圖；第9B圖是本發明實施例提供的示例性WUR的配置示意圖，該示例性WUR能夠處理MU喚醒封包來啟動(activate)主無線收發裝置；第10圖是本發明實施例提供的能夠產生MU喚醒封包的示例性無線通訊設備的框圖；第11圖是本發明實施例提供的示例性無線通訊設備的框圖，該無線通訊設備包括回應於MU喚醒封包能啟動主無線收發裝置的WUR。 FIG. 1 is an exemplary WLAN provided by an embodiment of the present invention. In this exemplary WLAN, the AP can send a MU wake-up packet to wake up the master wireless transceivers of a plurality of non-AP stations (STAs); FIG. 2 FIG. 3 is an exemplary format of an MU wake-up packet for carrying a plurality of wake-up signals and a single wake-up signal according to an embodiment of the present invention; FIG. 3 is an OOK wake-up signal including cascade in time domain and sent by FDMA according to an embodiment of the present invention FIG. 4 is an exemplary format of an exemplary MU wakeup packet carrying an OOK modulation wakeup signal according to an embodiment of the present invention; FIG. 5A is an exemplary MU wakeup packet provided by an embodiment of the present invention Format, the MU wake-up packet includes a reconfiguration window inserted between a traditional preamble and a directed to the OOK wake-up signal of two receiver stations (STA); FIG. 5B is a MU wake-up packet provided by an embodiment of the present invention The exemplary format of the MU wake-up packet includes a gap window (also called a gap symbol) inserted between OOK wake-up signals and a traditional preamble A protection symbol (spoof symbol) inserted between the signal and the OOK wake-up signal sequence; FIG. 6A and FIG. 6B are frequency sub-channels for sending multiple OOK wake-up signals in FDMA in a MU wake-up packet according to an embodiment of the present invention Exemplary multiplexing mechanism; FIGS. 7A and 7B are exemplary frequency band usages for transmitting an OOK wake-up signal in a MU wake-up packet according to an embodiment of the present invention; and FIG. 8A is an example of sending a MU wake-up packet according to an embodiment of the present invention. A flowchart of an exemplary process; FIG. 8B is an exemplary sending module provided by an embodiment of the present invention, and the sending module is used to generate waveforms of a plurality of wake-up signals included in a MU wake-up packet; FIG. 9A is A flowchart of an exemplary process for awakening an STA's inactive master wireless transceiver in response to a wake-up signal included in a MU wake-up packet according to an embodiment of the present invention; FIG. 9B is an exemplary WUR provided by an embodiment of the present invention. A schematic configuration diagram. This exemplary WUR is capable of processing a MU wake-up packet to activate the main wireless transceiver. FIG. 10 is an exemplary wireless communication capable of generating a MU wake-up packet according to an embodiment of the present invention. A block diagram of the apparatus; FIG. 11 is a block diagram of an exemplary wireless communication device according to an embodiment of the present invention, the wireless communication device comprises a response to a wake-up packet can start MU WUR master radio device.
現在將詳細參考本發明的優選實施例，其示例在附圖中示出。儘管將結合優選實施例描述本發明，但應理解的是，它們不旨在將本發明限制於這些實施例。相反，本發明旨在覆蓋可以包括在由所附請求項限定的本發明的精神和範圍內的替代，修改和等同物。此外，在本發明的實施例的以下詳細描述中，闡述了許多具體細節以便提供對本發明的透徹理解。然而，所屬領域具有通常知識者將認識到，可以在沒有這些具體細節的情況下實踐本發明。在其他 情況下，沒有詳細描述公知的方法，過程，元件和電路，以免不必要地模糊本發明實施例的精神。雖然為了清楚起見可以將方法描繪為一系列編號的步驟，但編號不一定指示步驟的順序。應該理解的是，一些步驟可以被跳過，並存執行，或者執行而不需要保持嚴格的順序。示出了本發明的實施例的附圖是半示意性的並且可能沒有按比例繪製，特別地，一些尺寸是為了清晰呈現並且在附圖中被放大示出。 Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Although the invention will be described in conjunction with preferred embodiments, it will be understood that they are not intended to limit the invention to these embodiments. On the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of embodiments of the invention, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, those having ordinary knowledge in the art will recognize that the invention may be practiced without these specific details. In other In this case, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure the spirit of the embodiments of the present invention. Although a method may be depicted as a series of numbered steps for clarity, numbering does not necessarily indicate the order of steps. It should be understood that some steps may be skipped, executed concurrently, or performed without maintaining a strict order. The drawings showing embodiments of the present invention are semi-schematic and may not be drawn to scale, in particular, some dimensions are for clarity of presentation and are shown enlarged in the drawings.
通過使用FDMA機制在WLAN中發送多用戶(Multi-User,MU)喚醒信號 Sending Multi-User (MU) wake-up signal in WLAN by using FDMA mechanism
總的來說，本發明公開的實施例提供用於發送和接收MU喚醒封包的通信協議，其中MU喚醒封包包含指向(directed to)複數個接收設備的喚醒信號。在無線局域網(WLAN)中，當發送設備試圖將複數個接收設備從睡眠模式中喚醒時，發送設備產生MU喚醒封包，該MU喚醒封包具有以OOK調製的喚醒信號。每個OOK調製的喚醒信號被映射到特定的頻率子通道並以FDMA發送。在接收到MU喚醒封包後，接收設備中的喚醒無線收發裝置WUR可以識別指向當前接收設備的喚醒信號，並相應地喚醒該設備中的主無線收發裝置。 In summary, the disclosed embodiments provide a communication protocol for sending and receiving MU wake-up packets, where the MU wake-up packet contains wake-up signals directed to a plurality of receiving devices. In a wireless local area network (WLAN), when a transmitting device attempts to wake up a plurality of receiving devices from a sleep mode, the transmitting device generates a MU wake-up packet, which has a wake-up signal modulated with OOK. Each OOK-modulated wake-up signal is mapped to a specific frequency subchannel and sent in FDMA. After receiving the MU wake-up packet, the wake-up wireless transceiver WUR in the receiving device can identify the wake-up signal pointing to the current receiving device and wake up the main wireless transceiver in the device accordingly.
根據本發明實施例公開的通信設備可以具有被配置為使用一種或複數種無線通訊技術(例如，藍牙，WI-FI和/或蜂窩技術，例如LTE，4G，5G等等)的主無線收發裝置。 A communication device disclosed according to an embodiment of the present invention may have a master wireless transceiver configured to use one or more wireless communication technologies (for example, Bluetooth, WI-FI, and / or cellular technologies, such as LTE, 4G, 5G, etc.) .
第1圖示出了本發明實施例提供的示例性WLAN100的示意圖，其中在該WLAN100中接入點(AP)可以發送MU喚醒封包111以喚醒複數個非AP站點(STA)的主無線收發裝置。AP 110和STA1 120，STA2 130和STAn140可以屬於一個基本服務集(Basic Service Set,BSS)。STA1 120，STA2 130和STAn140中的每一個具有主無線收發裝置和低功率喚醒無線收發裝置(LP-WUR)。例如為了節省電力，STA1 120中的主無線收發裝置122可以被斷電或者被置於睡眠狀 態或者以其他方式處於不活動狀態。在這種狀態下，主無線收發裝置122不能接收或發送封包。當主無線收發裝置處於不活動狀態時，WUR 121保持活動狀態並且可以接收從另一個設備(例如，AP 110)發送的喚醒信號。WUR 121響應接收到的喚醒信號，將主無線收發裝置切換回活動狀態。 FIG. 1 shows a schematic diagram of an exemplary WLAN 100 according to an embodiment of the present invention. In the WLAN 100, an access point (AP) can send a MU wake-up packet 111 to wake up a plurality of non-AP stations (STAs) for wireless transmission and reception. Device. The AP 110 and the STA1 120, the STA2 130, and the STAn 140 may belong to a Basic Service Set (BSS). Each of STA1 120, STA2 130, and STAn 140 has a master wireless transceiver and a low-power wake-up wireless transceiver (LP-WUR). For example, in order to save power, the main wireless transceiver 122 in the STA1 120 may be powered off or put into a sleep state. State or otherwise inactive. In this state, the master wireless transceiver 122 cannot receive or transmit packets. When the main wireless transceiver is in an inactive state, the WUR 121 remains active and can receive a wake-up signal sent from another device (for example, the AP 110). WUR 121 responds to the received wake-up signal and switches the main wireless transceiver back to the active state.
根據本發明實施例，AP 110可以識別需要被啟動的複數個STA，例如用於接收資料或發送資料。AP 110然後生成MU喚醒封包111，該MU喚醒封包111帶有用於複數個預期的STA的喚醒信號。以這種方式，多於一個STA可以同時接收喚醒信號並分別獨立地同時處理它們自己的喚醒信號。從AP的角度來看，這可以有助於顯著地減少接入AP的通道數量，並減少喚醒複數個STA的等待時間。 According to the embodiment of the present invention, the AP 110 may identify a plurality of STAs that need to be activated, for example, for receiving data or sending data. The AP 110 then generates a MU wake-up packet 111 with a wake-up signal for a plurality of prospective STAs. In this way, more than one STA can receive the wake-up signal at the same time and independently and simultaneously process their own wake-up signals. From the perspective of the AP, this can help significantly reduce the number of channels accessing the AP and reduce the waiting time to wake up multiple STAs.
為了實現整個WLAN範圍的覆蓋，WUR優選地在窄帶上操作。例如，用於發送喚醒信號的頻率頻寬可以是1MHz，2MHz，4MHz或5MHz。正如下面所描述的，通常的被分配用於發送資料的頻率通道可以分成幾個子通道，並且所選的子通道可以用於承載(carry)喚醒信號。然而，應該理解的是，在不脫離本發明公開範圍的情況下，可以使用任何合理的頻寬來發送喚醒信號。 In order to achieve coverage of the entire WLAN range, the WUR preferably operates on a narrow band. For example, the frequency bandwidth used to send the wake-up signal may be 1 MHz, 2 MHz, 4 MHz, or 5 MHz. As described below, the frequency channels that are generally allocated for transmitting data can be divided into several sub-channels, and the selected sub-channels can be used to carry wake-up signals. However, it should be understood that the wake-up signal may be sent using any reasonable bandwidth without departing from the scope of the present disclosure.
應該進一步理解，分配給STA的特定頻帶可以通過STA和AP之間的協商和/或訓練過程來確定。當STA的主無線收發裝置處於活動狀態時，協商過程可以通過STA的主無線收發裝置執行，或者，協商過程可以通過WUR本身執行。特定STA的喚醒信號固定在協商的頻帶上，可以根據特定的協商協定(protocol)通過新的協商和/或訓練過程來改變該協商的頻帶。 It should be further understood that the specific frequency band allocated to the STA may be determined through negotiation and / or training procedures between the STA and the AP. When the primary wireless transceiver of the STA is active, the negotiation process may be performed by the primary wireless transceiver of the STA, or the negotiation process may be performed by the WUR itself. The wake-up signal of a specific STA is fixed on a negotiated frequency band, and the negotiated frequency band may be changed through a new negotiation and / or training process according to a specific negotiation protocol.
根據本發明，AP110被配置為在所分配的子通道中使用OOK調製來調製喚醒信號。一般而言，OOK調製是表示在存在或不存在載波時數位資料的幅移鍵控(Amplitude-Shift Keying,ASK)調製的最簡單形式。AP 110可以通過FDMA在MU喚醒封包中傳輸複數個OOK調製的喚醒信號。接收MU喚醒封包的 WUR可以基於預期的頻率子通道中是否存在載波來確定封包是否包含旨在用於當前STA的喚醒信號，其中當前STA是指該WUR所在的STA。由於使用喚醒信號的簡單OOK調製，根據本發明實施例的WUR可以具有相對簡單且省電的配置，因為用於處理OOK信號的電路可以是低功率和低成本的。此外，對複數個使用者使用簡單的OOK調製和FDMA傳輸有助於提高頻譜使用效率和時間效率。 According to the present invention, the AP 110 is configured to modulate the wake-up signal using OOK modulation in the assigned sub-channel. Generally speaking, OOK modulation is the simplest form of Amplitude-Shift Keying (ASK) modulation for digital data in the presence or absence of a carrier. The AP 110 may transmit a plurality of OOK-modulated wake-up signals in a MU wake-up packet through FDMA. Receive MU wake-up packet The WUR may determine whether the packet contains a wake-up signal intended for the current STA based on whether a carrier exists in the expected frequency sub-channel, where the current STA refers to the STA in which the WUR is located. Due to the simple OOK modulation using the wake-up signal, the WUR according to an embodiment of the present invention can have a relatively simple and power-saving configuration because the circuit for processing the OOK signal can be low power and low cost. In addition, the use of simple OOK modulation and FDMA transmission for a plurality of users can help improve spectrum efficiency and time efficiency.
為了進一步減少STA的功率消耗，WUR本身可以具有睡眠協議。例如，WUR需要週期性的在睡眠視窗(“WUR睡眠視窗”)之後保持喚醒一段時間(“WUR喚醒視窗”)。喚醒視窗的持續時間可以基於喚醒信號的傳輸持續時間，基本服務集中具有WUR的STA的數量以及WUR的功耗要求來確定。例如，WUR喚醒視窗可以設置為2ms到20ms。為了確保對回應喚醒信號具有較低延遲，WUR睡眠視窗應該相對較短，例如90毫秒。優選地，WUR睡眠視窗被設置為與信標(beacon)間隔不同以避免信標和喚醒信號之間的衝突。WUR睡眠協議可以通過與AP協商或者與AP的協調過程來確定。 To further reduce the power consumption of the STA, the WUR itself may have a sleep protocol. For example, WUR needs to stay awake periodically after a sleep window ("WUR sleep window") ("WUR wake window"). The duration of the wake-up window can be determined based on the transmission duration of the wake-up signal, the number of STAs with WUR in the basic service set, and the power consumption requirements of the WUR. For example, the WUR wake-up window can be set to 2ms to 20ms. To ensure low latency in response to wake-up signals, the WUR sleep window should be relatively short, such as 90 milliseconds. Preferably, the WUR sleep window is set to be different from the beacon interval to avoid conflicts between the beacon and the wake-up signal. The WUR sleep protocol can be determined through negotiation with the AP or a coordination process with the AP.
在一些實施例中，MU喚醒封包包括傳統前導(legacy preamble)，該傳統前導用於欺騙沒有配置來處理MU喚醒封包的傳統設備，例如因為這些傳統設備缺少WUR。傳統前導攜帶有關MU喚醒封包的長度的資訊，並通知接收封包的傳統設備在該MU喚醒封包的封包傳輸期間避免發送信號。傳統設備可以是各種IEEE 802.11標準中定義的高輸送量(High Throughput,HT)設備，超高輸送量(Very High Throughput,VHT)設備和高效率(High Efficient,HE)設備，或任何其他類型的傳統設備。 In some embodiments, the MU wake-up packet includes a legacy preamble, which is used to trick traditional devices that are not configured to handle MU wake-up packets, for example because these traditional devices lack WUR. The traditional preamble carries information about the length of the MU wake-up packet and notifies the legacy device receiving the packet to avoid sending signals during the packet transmission of the MU wake-up packet. Traditional equipment can be various High Throughput (HT) equipment, Very High Throughput (VHT) equipment and High Efficient (HE) equipment as defined in various IEEE 802.11 standards, or any other type of Traditional equipment.
另外，MU喚醒封包中的喚醒信號可以包括喚醒前導(wake-up preamble)，該喚醒前導包含喚醒信號的簽名序列(signature sequence)，接收STA的ID，基本服務集的ID，AP的ID，資料部分和長度部分(該長度部分是可選的)，幀校驗序列(Frame Check Sequence,FCS)和/或任何其他合適的欄位和資 訊。在一些實施例中，代替特定的STA的ID，MU喚醒封包中的喚醒信號中的喚醒前導包括用於標識複數個接收方STA的STA組的組ID，即該喚醒信號是指向一組STA的，該組STA收到該喚醒信號之後，喚醒各自的主無線收發裝置，例如，家用網路中的所有STA。為了簡潔起見，圖中和描述中省略了可以包含在MU喚醒封包中的公知的欄位和資訊。其中，該喚醒前導可以位於喚醒信號中，也可以位於封包的其他部分中，比如封包的前導中。 In addition, the wake-up signal in the MU wake-up packet may include a wake-up preamble, which includes the signature sequence of the wake-up signal, the ID of the receiving STA, the ID of the basic service set, the ID of the AP, and data. Section and length section (the length section is optional), frame check sequence (FCS) and / or any other suitable fields and information News. In some embodiments, instead of the ID of a specific STA, the wake-up preamble in the wake-up signal in the MU wake-up packet includes the group ID of the STA group used to identify the plurality of receiver STAs, that is, the wake-up signal is directed to a group of STAs After receiving the wake-up signal, the group of STAs wakes up their respective primary wireless transceivers, for example, all STAs in the home network. For the sake of brevity, well-known fields and information that can be included in the MU wake-up packet are omitted in the figure and description. The wake-up preamble may be located in the wake-up signal, or may be located in other parts of the packet, such as the preamble of the packet.
第2圖示出了根據本發明實施例提供的用於攜帶複數個喚醒信號和單個喚醒信號的MU喚醒封包的示例性格式。MU喚醒封包200包括在20MHz頻寬的頻率通道中傳輸的傳統前導210。指向具有WUR的站點#k和站點#m的兩個喚醒信號211和212在傳統前導之後。喚醒信號211和212是OOK調製的並且通過分別佔用20MHz頻寬的兩個子通道(例如每個子通道中的4MHz)使用FDMA發送的。在僅需要喚醒一個STA的情況下，AP可以通過使用相同格式來生成單個用戶(single user，SU)喚醒封包。因此，如220所示，只有一個OOK喚醒信號被發送到預期的單個STA #m。 FIG. 2 illustrates an exemplary format of a MU wake-up packet for carrying a plurality of wake-up signals and a single wake-up signal according to an embodiment of the present invention. The MU wake-up packet 200 includes a conventional preamble 210 transmitted in a frequency channel with a bandwidth of 20 MHz. Two wake-up signals 211 and 212 pointing to station #k and station #m with WUR follow the traditional preamble. The wake-up signals 211 and 212 are OOK-modulated and are transmitted using FDMA through two sub-channels (for example, 4 MHz in each sub-channel) each occupying a bandwidth of 20 MHz. When only one STA needs to be woken up, the AP can generate a single user (SU) wakeup packet by using the same format. Therefore, as shown at 220, only one OOK wake-up signal is sent to the expected single STA #m.
在一些實施例中，發送MU喚醒信號可以使用FDMA與時域級聯方案的組合。通過級聯的發送喚醒信號序列，AP可以喚醒具有在相同子通道上操作的WUR的複數個STA。第3圖示出根據本發明實施例公開的MU喚醒封包300的示例性格式，該MU喚醒封包300帶有用FDMA發送的時域上級聯的OOK喚醒信號。如圖所示，STA # k1和STA # k2被分配具有用於喚醒信號的相同子通道。類似地，STA # m1和STA # m2共用相同的子通道，並且STA # n1和STA # n2共用相同的子通道。每個子通道攜帶在時域上級聯排列的複數個喚醒信號。例如，第一子通道311攜帶用於STA # k1的喚醒信號，STA # k1的喚醒信號後面是用於STA # k2的喚醒信號。在這種配置中，可以使用MU喚醒封包來喚醒大於可用子通道數量的複數個STA，從而進一步提高了在基本服務集中發送喚醒信號的時間效 率。相應地，傳統前導的SIG欄位中的持續時間欄位應該足夠大以保護所有級聯的喚醒序列的傳輸。 In some embodiments, sending a MU wake-up signal may use a combination of FDMA and a time-domain cascading scheme. By cascading sending wake-up signal sequences, the AP can wake up multiple STAs with WUR operating on the same subchannel. FIG. 3 illustrates an exemplary format of a MU wake-up packet 300 according to an embodiment of the present invention. The MU wake-up packet 300 is provided with an OOK wake-up signal cascaded in the time domain sent by FDMA. As shown, STA # k1 and STA # k2 are assigned the same subchannel for the wake-up signal. Similarly, STA # m1 and STA # m2 share the same sub-channel, and STA # n1 and STA # n2 share the same sub-channel. Each subchannel carries a plurality of wake-up signals arranged in cascade in the time domain. For example, the first sub-channel 311 carries a wake-up signal for STA # k1, and the wake-up signal for STA # k1 is followed by a wake-up signal for STA # k2. In this configuration, MU wakeup packets can be used to wake up multiple STAs that are larger than the number of available subchannels, thereby further improving the time efficiency of sending wakeup signals in the basic service set rate. Accordingly, the duration field in the traditional leading SIG field should be large enough to protect the transmission of all cascaded wake-up sequences.
在一些實施例中，MU喚醒封包可以組合用於喚醒一些不活動的STA的複數個喚醒信號和指向活動的STA的資料幀。活動的STA被配置了WUR，響應於由WUR產生的喚醒指示，主無線收發裝置已進入活動狀態。可選地，活動的STA可以僅具有在STA的操作期間始終保持活動的主無線收發裝置。 In some embodiments, the MU wake-up packet may combine a plurality of wake-up signals used to wake up some inactive STAs and a data frame directed to the active STAs. The active STA is configured with WUR, and in response to the wake-up instruction generated by the WUR, the master wireless transceiver device has entered an active state. Alternatively, an active STA may only have a master wireless transceiver that is always active during operation of the STA.
第4圖示出本發明實施例提供的攜帶OOK調製的喚醒信號412和資料幀413的示例性MU喚醒封包400的格式。例如，遵循IEEE802.11ax標準的高效率(high efficiency,HE)的STA #k處於活動狀態並且是預期的資料幀的接收設備。用OFDMA調製來調製資料幀。封包具有包括包含HE STA #k的所需信令的HE前導411。然而，本發明實施例提供的MU喚醒封包可以包括用於任何其他合適類型的STA的一個或者複數個資料幀。例如，用於HE STA #x的資料幀或者用於HE STA #k的資料幀。 FIG. 4 illustrates a format of an exemplary MU wake-up packet 400 carrying an OOK-modulated wake-up signal 412 and a data frame 413 according to an embodiment of the present invention. For example, a high efficiency (HE) STA #k complying with the IEEE 802.11ax standard is active and is a receiving device of expected data frames. Data frames are modulated with OFDMA modulation. The packet has an HE preamble 411 including the required signaling including HE STA #k. However, the MU wake-up packet provided by the embodiment of the present invention may include one or a plurality of data frames for any other suitable type of STA. For example, a data frame for HE STA #x or a data frame for HE STA #k.
喚醒信號412使用OOK調製或FSK調製，並且旨在用於具有WUR的不活動STA。例如，喚醒信號412係用於具有WUR的STA #m的喚醒信號。需要知道的是，本發明對包含在MU喚醒封包中喚醒信號的數量以及資料幀的數量不做限制。當複數個OOK喚醒信號被包含在喚醒封包中時，使用FDMA發送該複數個OOK喚醒信號。由於使用不同類型的調製，喚醒信號和資料幀可能潛在地相互干擾。接收方STA可以使用濾波和/或速率自我調整來減少或消除干擾，其可以以所屬領域習知的任何方式來實現。 The wake-up signal 412 uses OOK modulation or FSK modulation and is intended for inactive STAs with WUR. For example, the wake-up signal 412 is a wake-up signal for STA #m with WUR. It should be known that the present invention does not limit the number of wake-up signals included in the MU wake-up packet and the number of data frames. When a plurality of OOK wake-up signals are included in the wake-up packet, the plurality of OOK wake-up signals are sent using FDMA. Due to the use of different types of modulation, wake-up signals and data frames can potentially interfere with each other. The receiving STA may use filtering and / or rate self-adjustment to reduce or eliminate interference, which may be implemented in any manner known in the art.
在一些實施例中，可以在傳統前導(例如傳統/HT-VHT/HE前導)和後續喚醒信號之間***重配置視窗。重配置視窗有助於為發送器提供重置週期以便發送器調整其配置從產生一種類型的波形調整到產生另一種類型的波形，諸如功率，頻寬和RF/類比電路設置。例如，視窗的持續時間可以對應於發 送器從產生用於傳統前導的波形切換到產生用於喚醒信號的波形的過渡期間。在這個重配置視窗中傳輸的信號被視為不可靠，並且不會被接收方STA作為有效信號處理。第5A圖示出了本發明實施例提供的MU喚醒封包510的格式，MU喚醒封包510包括***在傳統前導511和指向兩個接收方STA的OOK喚醒信號512和513之間的重配置視窗514。重配置視窗514還可以用作用於特定級的傳統設備的保護符號，諸如遵循IEEE 802.11n標準的傳統設備。該保護符號使得監測到該封包的設備認為該封包是IEEE 802.11n的封包而不起來發送封包。重配置符號可以使用二進位相移鍵控(Binary Phase Shift Keying,BPSK)調製來生成。 In some embodiments, a reconfiguration window may be inserted between a traditional preamble (eg, a traditional / HT-VHT / HE preamble) and a subsequent wake-up signal. The reconfiguration window helps provide the transmitter with a reset period so that the transmitter can adjust its configuration from generating one type of waveform to generating another type of waveform, such as power, bandwidth, and RF / analog circuit settings. For example, the duration of the window can correspond to The transmitter switches the transition period from generating a waveform for a conventional preamble to generating a waveform for a wake-up signal. Signals transmitted in this reconfiguration window are considered unreliable and will not be treated as valid signals by the receiving STA. FIG. 5A illustrates the format of a MU wake-up packet 510 provided in an embodiment of the present invention. The MU wake-up packet 510 includes a reconfiguration window 514 inserted between a traditional preamble 511 and OOK wake-up signals 512 and 513 directed to two receiving STAs. . The reconfiguration window 514 may also be used as a protection symbol for a legacy device of a specific level, such as a legacy device complying with the IEEE 802.11n standard. The protection symbol makes the device that detects the packet think that the packet is an IEEE 802.11n packet and does not send the packet. Reconfiguration symbols can be generated using Binary Phase Shift Keying (BPSK) modulation.
第5B圖示出了本發明實施例提供的MU喚醒封包520的示例性格式，該MU喚醒封包520包括***在OOK喚醒信號之間的示例性間隔視窗525和***在傳統前導521和OOK喚醒信號序列之間的保護符號524。如圖所示，MU喚醒封包520攜帶使用FDMA發送時域上級聯的OOK喚醒信號。一個子通道用於傳輸指向複數個接收方STA的喚醒信號序列。***在傳統前導521和喚醒信號之間的保護符號524也用作發送器的重置週期，請參考前述第5A圖。另外，在同一子通道上的兩個相鄰喚醒信號(522,523)的傳輸之間還***間隔視窗(例如，525)。例如，間隔視窗525的時間可以比保護符號524的時間小得多。其中，間隔視窗525用於將兩個相鄰喚醒信號間隔開。該從間隔視窗525的時間可以對應於產生一個喚醒信號的波形到產生另一個喚醒信號的波形的重置(resettle)時間。其中，該圖中以及後續圖中的保護符號的作用可以與第5A圖中保護符號的作用相同，或者與第5A圖中重配置視窗514的作用相同。 FIG. 5B shows an exemplary format of a MU wake-up packet 520 according to an embodiment of the present invention. The MU wake-up packet 520 includes an exemplary interval window 525 inserted between OOK wake-up signals and a traditional preamble 521 and OOK wake-up signal. Protection symbol 524 between sequences. As shown in the figure, the MU wakeup packet 520 carries an OOK wakeup signal cascaded in the time domain sent using FDMA. One sub-channel is used to transmit a wake-up signal sequence directed to a plurality of receiver STAs. The protection symbol 524 inserted between the conventional preamble 521 and the wake-up signal is also used as the reset period of the transmitter. Please refer to FIG. 5A described above. In addition, a gap window (eg, 525) is inserted between transmissions of two adjacent wake-up signals (522, 523) on the same subchannel. For example, the time of the interval window 525 may be much smaller than the time of the guard symbol 524. The interval window 525 is used to separate two adjacent wake-up signals. The time from the interval window 525 may correspond to a resettle time from a waveform generating one wake-up signal to a waveform generating another wake-up signal. The role of the protection symbol in this figure and subsequent figures may be the same as the role of the protection symbol in FIG. 5A, or the same as the role of the reconfiguration window 514 in FIG. 5A.
因為本發明實施例提供的WUR可以在窄帶中操作，所以頻率通道可以被劃分成若干個子通道，該若干個子通道用於使用FDMA發送複數個喚醒信號。第6A-6B圖示出本發明實施例提供的用於使用FDMA在MU喚醒信號封包中傳輸複數個OOK喚醒信號的頻率子通道的示例性複用機制。第6A圖示出了 20MHz頻率通道被均勻地分成複數個4MHz子通道，並且兩個中間子通道611和612被用於發送喚醒信號。兩個子通道611和612以4MHz的頻率間隔分開以減少彼此之間的干擾，並且邊緣子通道未被使用。第6B圖示出20MHz頻率通道不均勻地分成三個4MHz子通道和四個2MHz子通道，其中每個4MHz子通道用於使用FDMA發送喚醒信號，而2MHz子通道用作喚醒信號之間的頻率間隔。邊緣2MHz子通道未使用。 Because the WUR provided by the embodiment of the present invention can operate in a narrow band, the frequency channel can be divided into several sub-channels, and the several sub-channels are used to send multiple wake-up signals using FDMA. 6A-6B illustrate exemplary multiplexing mechanisms for frequency sub-channels for transmitting a plurality of OOK wake-up signals in a MU wake-up signal packet using FDMA according to an embodiment of the present invention. Figure 6A shows The 20 MHz frequency channel is evenly divided into a plurality of 4 MHz sub-channels, and two intermediate sub-channels 611 and 612 are used to send wake-up signals. The two sub-channels 611 and 612 are separated at a frequency interval of 4 MHz to reduce interference between each other, and the edge sub-channels are not used. Figure 6B shows that the 20MHz frequency channel is unevenly divided into three 4MHz subchannels and four 2MHz subchannels, where each 4MHz subchannel is used to send a wakeup signal using FDMA, and the 2MHz subchannel is used as the frequency between the wakeup signals interval. Edge 2MHz subchannels are not used.
通過使用足夠的頻率間隔分開兩個鄰近的喚醒信號，有利的減少鄰近通道干擾(Adjacent Channel Interference,ACI)，其中，頻率間隔是4MHz或者2MHz。鄰近通道干擾減少導致在WUR中用於類比基帶濾波器的性能需求降低，因此簡化電路設計，降低WUR的開發和製造成本。 Adjacent channel interference (ACI) is advantageously reduced by separating two adjacent wake-up signals by using a sufficient frequency interval, where the frequency interval is 4 MHz or 2 MHz. The reduction of adjacent channel interference results in reduced performance requirements for analog baseband filters in WUR, thus simplifying circuit design and reducing WUR development and manufacturing costs.
第7A圖和第7B圖示出本發明實施例提供的在MU喚醒封包中傳輸OOK喚醒信號的頻帶使用的示例性示意圖。第7A圖示出使用FDMA，40MHz頻寬用於傳輸用於STA #n和STA #m的兩個喚醒信號，每一個喚醒信號在傳統前導和保護符號之後。40MHz頻寬被分成2個20MHz頻率通道以及兩個前導中每一個在一個通道中傳輸。對於每一個頻率通道，子通道用於傳輸OOK喚醒信號。相似的，第7B圖示出使用FDMA，80MHz頻寬傳輸4個喚醒信號至STA #n，#m，#k和#I。每一個喚醒信號在傳統前導和保護符號之後。在每一個20MHz頻率通道，子通道用於傳輸OOK喚醒信號。其中，在每一個20MHz頻率通道，可以使用一個或者多個子通道傳輸OOK喚醒信號。具體的，可以僅僅使用20MHz頻率通道的位於中間的子通道傳輸OOK喚醒信號，例如僅僅使用20MHz頻率通道的位於中間的4MHz子通道傳輸OOK喚醒信號，例如第6A圖中，20MHz頻率通道均分成多個4MHz，僅僅使用中間的4MHz作為子通道傳輸OOK喚醒信號，其他頻率部分不傳輸OOK喚醒信號；或者例如第6B圖中，中間的4MHz子通道用於傳輸OOK喚醒信號，其他頻率部分不傳輸OOK喚醒信號。以上僅僅是舉例，本發明 不限於此，在每一個20MHz頻率通道中，也可以使用多個子通道傳輸OOK喚醒信號。需要說明的是，第7B圖示出的80MHz頻寬分成4個20MHz，雖然第7B圖示出的每一個20MHz上都傳輸了OOK喚醒信號，但在其他實施方式中，某個20MHz可以不傳輸OOK喚醒信號，比如80MHz頻寬的第一個20MHz和第三個20MHz傳輸OOK喚醒信號，而第二個20MHz不傳輸OOK喚醒信號。 FIG. 7A and FIG. 7B show exemplary schematic diagrams of frequency band usage for transmitting an OOK wake-up signal in a MU wake-up packet according to an embodiment of the present invention. FIG. 7A shows that using FDMA, a 40 MHz bandwidth is used to transmit two wake-up signals for STA #n and STA #m, each wake-up signal is after the traditional preamble and protection symbol. The 40MHz bandwidth is divided into two 20MHz frequency channels and each of the two preambles is transmitted in one channel. For each frequency channel, the sub-channel is used to transmit the OOK wake-up signal. Similarly, Fig. 7B shows the transmission of four wake-up signals to STAs #n, #m, #k, and #I using FDMA and 80 MHz bandwidth. Each wake-up signal follows traditional preamble and protection symbols. In each 20MHz frequency channel, the subchannel is used to transmit the OOK wake-up signal. Among them, in each 20MHz frequency channel, one or more sub-channels can be used to transmit the OOK wake-up signal. Specifically, the OOK wake-up signal can be transmitted using only the middle subchannel of the 20MHz frequency channel. For example, only the middle 4MHz subchannel of the 20MHz frequency channel can be used to transmit the OOK wakeup signal. For example, in FIG. 6A, the 20MHz frequency channel is divided into multiple channels. 4MHz, use only the middle 4MHz as the sub-channel to transmit the OOK wake-up signal, and other frequency parts do not transmit the OOK wake-up signal; or, for example, in Figure 6B, the middle 4MHz sub-channel is used to transmit the OOK wake-up signal, and other frequency parts do not transmit OOK. Wake-up signal. The above are just examples, the present invention Not limited to this, in each 20MHz frequency channel, multiple subchannels can also be used to transmit the OOK wake-up signal. It should be noted that the 80 MHz bandwidth shown in FIG. 7B is divided into four 20 MHz. Although each 20 MHz shown in FIG. 7B transmits an OOK wake-up signal, in other embodiments, a certain 20 MHz may not be transmitted. OOK wake-up signal, for example, the first 20MHz and the third 20MHz of the 80MHz bandwidth transmit the OOK wake-up signal, and the second 20MHz does not transmit the OOK wake-up signal.
第8A圖是本發明實施例提供的發送MU喚醒封包的示例性過程800的流程圖。過程800可以由AP，或者在WLAN上發送喚醒信號以便喚醒不活動的無線通訊設備的任何其他合適的無線通訊設備。 FIG. 8A is a flowchart of an exemplary process 800 of sending a MU wake-up packet according to an embodiment of the present invention. Process 800 may be performed by the AP, or any other suitable wireless communication device that sends a wake-up signal on a WLAN to wake up an inactive wireless communication device.
在步驟801，執行協商過程以在發送設備與接收設備之間協調關於MU喚醒封包的通信，例如由AP的主無線收發裝置協調。AP和接收方STA之間的協商可以確定要在MU喚醒封包傳輸中使用的各個方面的參數，例如中心頻率，頻率頻寬，OOK調製參數，WUR的睡眠協議等。協商過程可能涉及WUR或接收方STA的主無線收發裝置。可以理解的是，可以在各種合適的情況下進行重新協商，例如，週期性地重新協商或回應於使用者指令或某些事件(例如引入新的STA)以重新協商。 In step 801, a negotiation process is performed to coordinate communication about the MU wake-up packet between the transmitting device and the receiving device, for example, coordinated by the main wireless transceiver of the AP. The negotiation between the AP and the receiving STA can determine various parameters to be used in the transmission of the MU wake-up packet, such as the center frequency, frequency bandwidth, OOK modulation parameters, WUR sleep protocol, etc. The negotiation process may involve the main wireless transceiver of the WUR or the receiving STA. It can be understood that the renegotiation may be performed in various suitable situations, for example, periodically renegotiating or responding to a user instruction or some event (such as introducing a new STA) to renegotiate.
在步驟802處，AP識別主無線收發裝置需要喚醒來執行資料通信的一個或者複數個STA，其中資料通信例如接收下行鏈路數據封包，發送上行鏈路數據封包，或者與其他對等STA傳輸封包。在步驟803處，產生包含指向複數個識別出的STA的喚醒信號的MU喚醒封包。每一個喚醒信號使用OOK/FSK調製來調製，並且被映射到協商的頻率子通道。如前所述，一個以上喚醒信號可以被配置到相同的頻率子通道並且在時域上級聯。如果僅存在一個需要喚醒的STA，能通過使用相同封包格式產生單用戶SU封包。而且，MU喚醒封包也包括指向活動STA的一個或者複數個資料幀。可以理解的是，產生MU喚醒封包涉及寬範圍的信號處理，例如填充(padding)，加擾(scrambling)，編碼，解析，頻率映射等 等。 At step 802, the AP identifies one or more STAs that the primary wireless transceiver needs to wake up to perform data communication, where the data communication is, for example, receiving downlink data packets, sending uplink data packets, or transmitting packets with other peer STAs. . At step 803, a MU wake-up packet containing wake-up signals directed to a plurality of identified STAs is generated. Each wake-up signal is modulated using OOK / FSK modulation and mapped to a negotiated frequency subchannel. As mentioned earlier, more than one wake-up signal can be configured to the same frequency subchannel and cascaded in the time domain. If there is only one STA that needs to wake up, a single-user SU packet can be generated by using the same packet format. In addition, the MU wake-up packet also includes one or more data frames pointing to the active STA. It can be understood that generating MU wake-up packets involves a wide range of signal processing, such as padding, scrambling, encoding, parsing, frequency mapping, etc. Wait.
在步驟804處，經由AP設備的發送器和天線陣列發送喚醒封包。例如使用FDMA發送MU喚醒封包到識別出的STA。根據調度演算法，前述的802-804可以週期性重複，或者前述的802-804可以由某些事件觸發。 At step 804, a wake-up packet is sent via the transmitter and antenna array of the AP device. For example, use FDMA to send a MU wake-up packet to the identified STA. According to the scheduling algorithm, the aforementioned 802-804 may be repeated periodically, or the aforementioned 802-804 may be triggered by certain events.
本發明對在發送器中產生FDMA的OOK喚醒信號的波形的方法不做限制。在一些實施例中，這種波形能夠在基帶模組(例如使用AP的主無線收發裝置)中產生，然後數位的調製到窄頻寬的對應子通道中。每一個子通道可以包含至少一個OOK喚醒信號並且每一個喚醒信號用於喚醒某個具有WUR的STA。 The invention does not limit the method of generating the waveform of the OOK wake-up signal of FDMA in the transmitter. In some embodiments, such a waveform can be generated in a baseband module (such as a master wireless transceiver using an AP), and then digitally modulated into a corresponding subchannel of a narrow bandwidth. Each sub-channel may contain at least one OOK wake-up signal and each wake-up signal is used to wake up a certain STA with WUR.
第8B圖示出本發明實施例提供的示例性發送器模組850，該發送器模組用於產生包含在MU喚醒封包中的複數個喚醒信號的波形。例如，該發送器可以是STA #k中的發送器。發送器(未明確示出)具有平行的處理路徑860,870和880，這些處理路徑860,870和880並行的操作來產生複數個喚醒信號。每一個路徑包括用於相應子通道的OOK基帶電路861，脈衝整形電路862和數位混頻電路863。例如，對於指向STA #k(或者WUR #k)的喚醒信號，OOK基帶電路861使用OOK調製來調製載波信號，並且產生基帶OOK信號。脈衝整形電路862調整基帶OOK信號的波形以使該信號適合於為其分配的頻率子通道#1。處理路徑860中的數位混頻電路863對頻率子通道#1中的數位信號進行混頻。處理路徑870中的數位混頻電路對頻率子通道#2中的數位信號進行混頻。處理路徑880中的數位混頻電路對頻率子通道#D中的數位信號進行混頻。然後各種子通道的信號在加法器881中被組合，組合後的信號被提供到DAC882以進行數位至類比轉換，然後提供給下游邏輯(未示出)。然後將得到的類比信號用FDMA通過天線陣列發送。 FIG. 8B illustrates an exemplary transmitter module 850 provided by an embodiment of the present invention. The transmitter module is configured to generate waveforms of a plurality of wake-up signals included in a MU wake-up packet. For example, the transmitter may be a transmitter in STA #k. The transmitter (not explicitly shown) has parallel processing paths 860, 870, and 880, which operate in parallel to generate a plurality of wake-up signals. Each path includes an OOK baseband circuit 861, a pulse shaping circuit 862, and a digital mixing circuit 863 for a corresponding subchannel. For example, for a wake-up signal directed to STA #k (or WUR #k), the OOK baseband circuit 861 uses OOK modulation to modulate a carrier signal and generates a baseband OOK signal. The pulse shaping circuit 862 adjusts the waveform of the baseband OOK signal so that the signal is suitable for the frequency sub-channel # 1 assigned to it. The digital mixing circuit 863 in the processing path 860 mixes the digital signals in the frequency sub-channel # 1. The digital mixing circuit in the processing path 870 mixes the digital signals in the frequency sub-channel # 2. The digital mixing circuit in the processing path 880 mixes the digital signals in the frequency sub-channel #D. The signals of the various sub-channels are then combined in an adder 881, and the combined signals are provided to a DAC 882 for digital-to-analog conversion and then to downstream logic (not shown). The resulting analog signal is then sent through the antenna array using FDMA.
第9A圖是本發明實施例提供的回應於包含在MU喚醒封包中的喚醒 信號，喚醒STA的不活動的主無線收發裝置的示例性過程的流程圖。過程900可以由與主無線收發裝置耦接的WUR執行。與第8A圖中的801相對應，在步驟901處，執行協商過程以協調在發送器設備(例如在AP中的主無線收發裝置)和STA的WUR之間關於MU喚醒封包的通信。在AP和STA之間的協商可以獲得將在後續MU喚醒封包傳輸中使用的各方面的參數，例如中心頻率，頻帶，OOK調製參數，WUR的睡眠協議等等。重協商可以在各種適合的情況下發生，比如將新的STA引入到WLAN可以引起重協商或者回應使用者指令進行重協商，例如可以是週期性的重協商。 FIG. 9A is a response to a wakeup included in a MU wakeup packet according to an embodiment of the present invention; Signaling, a flowchart of an exemplary process of waking an STA's inactive master wireless transceiver. Process 900 may be performed by a WUR coupled to a master wireless transceiver. Corresponding to 801 in FIG. 8A, at step 901, a negotiation process is performed to coordinate communication between the transmitter device (for example, the main wireless transceiver in the AP) and the WUR of the STA regarding the MU wakeup packet. Negotiations between AP and STA can obtain various parameters that will be used in subsequent MU wake-up packet transmission, such as center frequency, frequency band, OOK modulation parameters, WUR sleep protocol, and so on. Renegotiation can occur in various suitable situations. For example, the introduction of a new STA into the WLAN may cause renegotiation or renegotiation in response to a user instruction. For example, it may be periodic renegotiation.
在該例子中，WUR採用如上所描述的睡眠協定。在步驟902處，WUR在喚醒窗口醒來。在步驟903處，WUR通過WLAN接收MU喚醒封包。在步驟904處，根據封包中的前導，WUR將接收到的封包標識為FDMA OOK喚醒封包，並且標識當前的STA是預期的接收器。例如，封包中的喚醒信號中的喚醒前導指定喚醒簽名序列，AP的ID，目標STA的組ID，當前STA的ID等等。其中，當前STA可以是該WUR所在的STA。在步驟905處，WUR識別並處理指向當前STA的MU封包中的特定喚醒信號。在步驟906處，根據喚醒信號，產生喚醒指示。在步驟907處，向主無線收發裝置發送喚醒指示，作為回應，主無線收發裝置被啟動並準備好資料傳輸活動。可選的，喚醒信號的喚醒前導可以指定某個STA的ID，則表示該喚醒信號被指向該ID所標識的STA，後續該STA中的WUR向主無線收發裝置發送喚醒指示，或者，喚醒信號的喚醒前導可以指定一個組ID，即STA組的組ID，則表示該喚醒信號被指向該ID所對應的一組STA，該組STA包括多個STA，後續該STA組中的各個STA的WUR向相應的主無線收發裝置發送喚醒指示。 In this example, WUR uses a sleep protocol as described above. At step 902, the WUR wakes up in the wake-up window. At step 903, the WUR receives the MU wake-up packet through the WLAN. At step 904, according to the preamble in the packet, the WUR identifies the received packet as a FDMA OOK wake-up packet, and identifies that the current STA is the intended receiver. For example, the wakeup preamble in the wakeup signal in the packet specifies the wakeup signature sequence, the ID of the AP, the group ID of the target STA, the ID of the current STA, and so on. The current STA may be the STA where the WUR is located. At step 905, the WUR identifies and processes a specific wake-up signal in a MU packet directed to the current STA. At step 906, a wake-up instruction is generated according to the wake-up signal. At step 907, a wake-up instruction is sent to the master wireless transceiver device. In response, the master wireless transceiver device is activated and ready for data transmission activities. Optionally, the wake-up preamble of the wake-up signal can specify the ID of a certain STA, which means that the wake-up signal is directed to the STA identified by the ID, and the WUR in the STA subsequently sends a wake-up instruction to the master wireless transceiver, or the wake-up signal The wake-up preamble can specify a group ID, that is, the group ID of the STA group, which indicates that the wake-up signal is directed to a group of STAs corresponding to the ID. The group of STAs includes multiple STAs, and the WUR of each STA in the subsequent STA group Send a wake-up instruction to the corresponding master wireless transceiver.
第9B圖是本發明實施例提供的能夠處理MU喚醒封包來啟動主無線收發裝置的示例性WUR 950。MU喚醒封包包括FDMA OOK喚醒信號。WUR包 括自動增益控制器(Automatic Gain Controller,AGC)951，RF本地振盪器952，混頻器953，低通濾波器(Low Pass Filer,LPF)954，類比至數位轉換器(ADC)955和OOK信號檢測器956。 FIG. 9B is an exemplary WUR 950 capable of processing a MU wake-up packet to start a master wireless transceiver according to an embodiment of the present invention. The MU wakeup packet includes a FDMA OOK wakeup signal. WUR bag Including Automatic Gain Controller (AGC) 951, RF Local Oscillator 952, Mixer 953, Low Pass Filer (LPF) 954, Analog-to-Digital Converter (ADC) 955 and OOK Signal Detector 956.
WUR950能夠通過接收天線(未示出)接收RF信號，例如接收MU喚醒封包的信號。AGC951包括衰減器(attenuator，ATT)，控制接收信號的幅度或者增益。濾波器(未示出)對RF信號濾波，並且RF本地振盪器振盪出RF頻率同時將RF頻率切換到指向WUR950的喚醒信號的中心頻率，並且輸出RF本地振盪頻率到混頻器953，其中RF本地振盪頻率與喚醒信號的中心頻率基本相同或者相近。混頻器953通過使用RF本地振盪器952輸出的RF本地振盪頻率，將來自濾波器的RF信號轉換成基帶信號。LPF954根據之前協商過程所確定的喚醒信號的頻寬，將濾波器的濾波頻寬調整到喚醒信號的頻寬，對混頻器953提供的基帶信號進行濾波。ADC955將LPF954輸出的類比基帶信號轉換成數位基帶信號。 The WUR950 can receive RF signals through a receiving antenna (not shown), such as receiving a signal from a MU wake-up packet. The AGC951 includes an attenuator (ATT) to control the amplitude or gain of the received signal. A filter (not shown) filters the RF signal, and the RF local oscillator oscillates the RF frequency while switching the RF frequency to the center frequency of the wake-up signal pointing to WUR950, and outputs the RF local oscillation frequency to the mixer 953, where RF The local oscillation frequency is basically the same as or similar to the center frequency of the wake-up signal. The mixer 953 converts the RF signal from the filter into a baseband signal by using the RF local oscillation frequency output from the RF local oscillator 952. The LPF954 adjusts the filter bandwidth of the filter to the bandwidth of the wake-up signal according to the bandwidth of the wake-up signal determined in the previous negotiation process, and filters the baseband signal provided by the mixer 953. ADC955 converts the analog baseband signal output by LPF954 into a digital baseband signal.
OOK信號檢測器956解調ADC955輸出的數位基帶信號。根據是否能夠在濾波後的類比信號中確定能量，WUR能確定在指向當前STA的特定子通道中MU喚醒封包是否攜帶OOK喚醒信號。特別的，如果OOK信號檢測器956在特定頻率子通道中檢測到能量，產生用於喚醒主無線收發裝置的喚醒指示。 The OOK signal detector 956 demodulates the digital baseband signal output from the ADC 955. According to whether the energy can be determined in the filtered analog signal, the WUR can determine whether the MU wakeup packet carries an OOK wakeup signal in a specific subchannel directed to the current STA. Specifically, if the OOK signal detector 956 detects energy in a specific frequency sub-channel, it generates a wake-up instruction for waking up the main wireless transceiver.
第10圖本發明實施例提供的能夠產生MU喚醒封包的示例性無線通訊設備1000的框圖。通信設備1000可以是具有用於資料通信的收發器的AP或者非AP，例如通用目的電腦，智慧手機，平板可穿戴設備，物聯網(Internet of Thing,IoT)上使用的偵測器等等。 FIG. 10 is a block diagram of an exemplary wireless communication device 1000 capable of generating a MU wake-up packet according to an embodiment of the present invention. The communication device 1000 may be an AP or a non-AP with a transceiver for data communication, such as a general-purpose computer, a smart phone, a tablet wearable device, a detector used on the Internet of Things (IoT), and the like.
設備1000包括主處理器1030，記憶體1020和與天線陣列1001-1004耦接的收發器440。記憶體1020包括喚醒管理器1021，存儲用於產生喚醒信號和MU喚醒封包的其他部分配置的處理器可執行指令，正如在第1-8A圖中所詳細描述的。喚醒管理器1021也存儲與喚醒封包產生和管理相關的其他資訊，例如STA 的ID，STA的組ID，主無線收發裝置的睡眠協定和STA的WUR，協商協議，分配給各個WUR的頻率子通道，MU喚醒封包格式等等。在一些其他實施例中，喚醒管理器1021被存儲在收發器1040中的記憶體中。 The device 1000 includes a main processor 1030, a memory 1020, and a transceiver 440 coupled to the antenna arrays 1001-1004. The memory 1020 includes a wake-up manager 1021, which stores processor-executable instructions configured to generate a wake-up signal and other parts of the MU wake-up packet, as described in detail in FIGS. 1-8A. The wake-up manager 1021 also stores other information related to the generation and management of wake-up packets, such as STA ID of the STA, group ID of the STA, sleep agreement of the main wireless transceiver device and WUR of the STA, negotiation protocol, frequency sub-channel allocated to each WUR, MU wake-up packet format, etc. In some other embodiments, the wake-up manager 1021 is stored in memory in the transceiver 1040.
收發器1040包括OOK基帶模組1041，脈衝整形模組1042和數位混頻模組1043，這些模組操作來產生OOK喚醒信號以用於用FDMA發送OOK喚醒信號，正如第8B圖所詳細描述的。收發器1040進一步包括用於產生MU喚醒封包或者資料包或者任何其他類型的通信傳輸單元的每一部分的發送路徑的各種模組。例如，具有發送先入先出(transmit First-In-First-Out,TX FIFO)模組1044，編碼器1046，擾頻器(scrambler)1045，交織器(interleaver)1048，星座映射器1047，反向離散傅裡葉變換器(Inversed Discrete Fourier Transformer,IDFT)1049，以及保護間隔(Guard Interval，G I)和視窗***模組1050。具體的，OOK基帶模組1041用於使用OOK調製來調製載波信號，並且產生基帶OOK信號；脈衝整形模組1042用於對基帶OOK信號進行整形，數位混頻模組1043對脈衝整形模組1042輸出的數位信號進行混頻，混頻後的信號經過具有發送先入先出模組1044，編碼器1046，擾頻器1045，交織器1048，星座映射器1047，反向離散傅裡葉變換器1049，以及GI和視窗***模組1050中的一個或者複數個模組處理後發送出去。其中，GI和視窗***模組1050可以在WU喚醒封包中***重配置視窗514，保護符號524和間隔視窗525的至少一個。 The transceiver 1040 includes an OOK baseband module 1041, a pulse shaping module 1042, and a digital mixing module 1043. These modules operate to generate an OOK wakeup signal for sending an OOK wakeup signal using FDMA, as described in detail in FIG. 8B. . The transceiver 1040 further includes various modules for generating a transmission path of each part of the MU wake-up packet or data packet or any other type of communication transmission unit. For example, it has a transmit first-in-first-out (TX FIFO) module 1044, an encoder 1046, a scrambler 1045, an interleaver 1048, a constellation mapper 1047, and a reverse Discrete Fourier Transformer (Inversed Discrete Fourier Transformer, IDFT) 1049, and Guard Interval (GI) and window insertion module 1050. Specifically, the OOK baseband module 1041 is used to modulate the carrier signal using OOK modulation and generate a baseband OOK signal; the pulse shaping module 1042 is used to shape the baseband OOK signal, and the digital mixing module 1043 uses the pulse shaping module 1042 The output digital signal is mixed, and the mixed signal passes through a first-in-first-out module 1044, an encoder 1046, a scrambler 1045, an interleaver 1048, a constellation mapper 1047, and an inverse discrete Fourier transformer 1049. , And one or more of the GI and window insertion modules 1050 are processed and sent. The GI and window insertion module 1050 can insert at least one of a reconfiguration window 514, a protection symbol 524, and an interval window 525 in a WU wake-up packet.
第11圖是本發明實施例提供的示例性無線通訊設備1100，該無線通訊設備1100包括能夠回應於MU喚醒封包，啟動主無線收發裝置的WUR1150。設備1100可以是非AP的STA，其通過無線局域網與其他設備執行資料通信。設備1100可以是通用目的電腦，智慧手機，平板可穿戴設備，IoT中的偵測器等等。 FIG. 11 is an exemplary wireless communication device 1100 according to an embodiment of the present invention. The wireless communication device 1100 includes a WUR 1150 capable of responding to a MU wake-up packet and activating a main wireless transceiver. The device 1100 may be a non-AP STA, which performs data communication with other devices through a wireless local area network. The device 1100 may be a general-purpose computer, a smart phone, a tablet wearable device, a detector in the IoT, and so on.
設備1100包括主處理器1130，記憶體1120和與天線1101耦接的收發器1140。收發器包括操作進入不活動狀態以節省功率的主無線收發裝置1141。 WUR1150能處理MU喚醒封包並且相應的產生指示來啟動主無線收發裝置1141，正如第9A圖相關部分所詳細描述的。特別的，WUR1150包括AGC 1151，混頻器1152，LPF 1153和OOK信號檢測器1154，正如第9B圖相關部分所詳細描述的。 The device 1100 includes a main processor 1130, a memory 1120, and a transceiver 1140 coupled to the antenna 1101. The transceiver includes a primary wireless transceiver 1141 that operates into an inactive state to save power. The WUR1150 can process the MU wake-up packet and generate a corresponding instruction to activate the main wireless transceiver 1141, as described in detail in the relevant part of FIG. 9A. Specifically, WUR 1150 includes AGC 1151, mixer 1152, LPF 1153, and OOK signal detector 1154, as described in detail in the relevant part of FIG. 9B.
在主無線收發裝置1141中的各種模組用於處理接收的資料封包或者任何其他類型的通信傳輸單元。正如所示出的，主無線收發裝置包括接收先入先出模組(receive First-In-First-Out,RX FIFO)1142，同步器1143，通道估計器和量化器1144，解碼器1146，解映射器1145，解交織器1149，快速傅裡葉變換器(Fast Fourier Transformer,FFT)1148和解擾器(descrambler)1147。 Various modules in the main wireless transceiver 1141 are used to process received data packets or any other type of communication transmission unit. As shown, the main wireless transceiver includes a receive first-in-first-out (RX FIFO) module 1142, a synchronizer 1143, a channel estimator and quantizer 1144, a decoder 1146, and a demapping. A decoder 1145, a deinterleaver 1149, a Fast Fourier Transformer (FFT) 1148, and a descrambler 1147.
主無線收發裝置1141中的各種模組用於處理接收的資料包或者任何其他類型的通信傳輸單元。正如所示出的，主無線收發裝置包括RX FIFO 1142，同步器1143，通道估計器和量化器1144，解碼器1146，解映射器1145，解交織器1149，快速傅裡葉變換器(Fast Fourier Transformer,FFT)1148和解擾器(descrambler)1147。 Various modules in the main wireless transceiver 1141 are used to process received data packets or any other type of communication transmission unit. As shown, the main wireless transceiver includes an RX FIFO 1142, a synchronizer 1143, a channel estimator and quantizer 1144, a decoder 1146, a demapper 1145, a deinterleaver 1149, and a Fast Fourier transformer (Fast Fourier Transformer (FFT) 1148 and descrambler 1147.
可以理解的是，在第10圖中的收發器1040和第11圖中的收發器1141可以包括所屬領域習知的範圍內的其他合適部件。各種部件可以以所屬領域習知的任何合適的方式來實現，並且可以使用硬體，固件和軟體邏輯或其任何組合來實現。此外，在一些實施例中，第10圖中的收發器1040還可以包括如參考第11圖中的主無線收發裝置1141更詳細描述的接收路徑中的部件，反之亦然。 It can be understood that the transceiver 1040 in FIG. 10 and the transceiver 1141 in FIG. 11 may include other suitable components within the scope known in the art. The various components may be implemented in any suitable manner known in the art and may be implemented using hardware, firmware, and software logic or any combination thereof. In addition, in some embodiments, the transceiver 1040 in FIG. 10 may further include components in the receiving path as described in more detail with reference to the master wireless transceiver 1141 in FIG. 11 and vice versa.
雖然本文已經公開了某些優選實施例和方法，但所屬領域具有通常知識者可以在不脫離本發明的精神和範圍的情況下對這些實施例和方法進行變化和修改，任何不脫離本發明的精神和範圍內的修改都在本申請請求項的覆蓋範圍內。 以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。 Although certain preferred embodiments and methods have been disclosed herein, those skilled in the art can make changes and modifications to these embodiments and methods without departing from the spirit and scope of the present invention. Modifications within the spirit and scope are all covered by the claims of this application. The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the scope of patent application of the present invention shall fall within the scope of the present invention.
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