Wi-Fi联盟的最新标准Wi-Fi Direct，相关产品将在2010年推出。此消息一出，立刻引起Wi-Fi Direct与高速蓝牙3.0之间的竞争浮出台面，双方在PC和消费电子领域势必将展开激烈的竞逐。双方在功能与应用上相互重迭，技术也各有利弊，谁能胜出尚待观察。

The Wi-Fi alliance’s latest standard Wi-Fi Direct’s related products will be launched in 2010. Once this news came out, the competition between high-speed Wi-Fi Direct and Bluetooth 3.0 immediately surfaced. They will surely compete fiercely in the PC and consumer electronics industries. Their functions and applications overlap, and each technology has its advantages and disadvantages. We will see which one is going to win.

Wi-Fi Direct技术最主要的特色，在于即使没有Wi-Fi网络、热点或是Internet连接，藉由Wi-Fi点对点技术，Wi-Fi Direct都可以让任何Wi-Fi装置直接相互链接传输。例如，Wi-Fi Direct可让笔电直接传输讯息，无须USB联机和E-mail作为媒介；消费者也可藉由单一Wi-Fi Direct远程控制装置，直接控制数字家庭内各类具备Wi-Fi升级功能的消费电子产品。以往传统PAN解决方案只能局限在室内单一隔间环境，Wi-Fi Direct技术则将打破这个藩篱，将传输覆盖范围直接扩及到室内各个角落。

Wi-Fi Direct technology’s key feature is that even without Wi-Fi networks, hotspots or Internet connections, simply with the help of Wi-Fi peer to peer technology, Wi-Fi Direct can make any Wi-Fi device directly interconnected. For example, Wi-Fi Direct enables laptops to directly transmit information, without USB connections and E-mails as the medium. Consumers can use a single Wi-Fi Direct remote control device to directly control various types of digital home’s Wi-Fi-upgradeable consumer electronics products. Traditional PAN solutions limit the transmission within a single indoor compartment environment, but Wi-Fi Direct technology will break the barrier, and extend the direct transmission range to every corner of the room.

《图一 Figure’s explanation: (Figure I) Currently Wi-Fi Direct applications focus on printing photos of cameras, sharing music, syncing, and showing mobile phone pictures on television.》

IP-based Wi-Fi Direct applications are becoming gradually clear.

Wi-Fi Direct技术的轮廓才刚浮现，便引起业界人士的好奇。Wi-Fi Direct技术究竟会长什么样？它将如何让无线局域网络应用改头换面令人耳目一新？Wi-Fi联盟执行董事Edgar Figueroa指出，Wi-Fi Direct核心物理层是以IEEE 802.11a/b/g/n为主，并以IP为基础的无线网络设计，不仅能够兼容之前任何的Wi-Fi技术，并且只要透过软件升级无须更动任何硬件装置，便可让既有的Wi-Fi功能升级到Wi-Fi Direct。

Ever since Wi-Fi Direct technology started to emerge, the industry started to feel curious. What will Wi-Fi Direct technology actually look like? How will it make wireless local area network applications totally change and make us feel refreshed? Wi-Fi alliance executive director Edgar Figueroa pointed out; Wi-Fi Direct’s core physical layer focuses on IEEE 802.11a/b/g/n, and IP-based wireless network design. It is compatible with any Wi-Fi technology in the past; moreover, you can upgrade existing Wi-Fi functions to Wi-Fi Direct by software upgrading, and no any hardware devices changes are necessary.

Edgar Figueroa强调，Wi-Fi Direct技术即使没有Wi-Fi网络、热点或是Internet连接，藉由Wi-Fi点对点技术，Wi-Fi Direct都可以让任何Wi-Fi装置直接相互链接传输。Wi-Fi Direct更可让笔电之间直接传输讯息，而无须USB联机和Email作为媒介；Wi-Fi Direct也可实现消费者藉由单一远程控制装置，直接控制数字家庭内各类具备Wi-Fi升级功能的消费电子产品。

Edgar Figueroa emphasized, even without Wi-Fi networks, hotspots or Internet connections, simply with the help of Wi-Fi peer to peer technology, Wi-Fi Direct technology can make any Wi-Fi device directly interconnected. For example, Wi-Fi Direct enables laptops to directly transfer information, without USB connections and E-mails as the medium. Consumers can use a single Wi-Fi Direct remote control device to directly control various types of digital home’s Wi-Fi-upgradeable consumer electronics products.

Edgar Figueroa也透露，首批经过Wi-Fi联盟认证后的Wi-Fi Direct产品预计将在2010年中旬推出。

Edgar Figueroa also revealed the first batch of Wi-Fi alliance certified Wi-Fi Direct products are expected to be launched in middle 2010.

《图二 Wi-Fi alliance executive director Edgar Figueroa said, Wi-Fi Direct’s directly exchange and transmission are mature and ready. People can use it to develop more new Wi-Fi applications. 》

Edgar Figueroa进一步说明，Wi-Fi Direct技术在吞吐量和覆盖范围上，将根本地改变了以往个人局域网络的使用经验。以往传统PAN解决方案只能局限在室内单一隔间环境，Wi-Fi Direct技术则将打破这个藩篱，将传输覆盖范围直接扩及到室内各个角落。Edgar Figueroa指出，Wi-Fi Direct的传输范围可达200公尺，传速速率可到250Mbps，在传输安全性设计上搭配Wi-Fi保护装置和WPA2安全设计，并采用QoS机制和节能方案，能够让目前超过6亿人使用的Wi-Fi功能直接升级。

Edgar Figueroa further explained, Wi-Fi Direct technology, in throughput and coverage, will fundamentally change the past personal area network usage experience. Traditional PAN solutions limit the transmission within a single indoor compartment environment, but Wi-Fi Direct technology will break the barrier, and extend the direct transmission range to every corner of the room. Edgar Figueroa pointed out, Wi-Fi Direct transmission range is up to 200 meters. Its transmission speed can reach 250Mbps. As for the design of the transmission safety, it uses Wi-Fi protection devices and WPA2 security design. It also uses of QoS mechanisms and energy-saving solutions. It can, currently, enable Wi-Fi functionality that more than 600 million people are using directly upgrade.

因此，Edgar Figueroa认为，Wi-Fi Direct将能带动另一波新兴的Wi-Fi应用市场。目前规划的Wi-Fi Direct技术应用将以打印相机相片、分享音乐、同步联络、在电视上显示移动电话图片等为主。目前也已经有厂商将Wi-Fi Direct技术应用在鼠标，可运作笔电功能直接传输并显示多媒体图片，并与其他具备Wi-Fi Direct的装置直接分享。

Thus, Edgar Figueroa believed that, Wi-Fi Direct will be able to drive another wave of emerging Wi-Fi applications markets. Wi-Fi Direct applications currently focus on printing photos of cameras, sharing music, syncing, and showing mobile phone pictures on television. Manufacturers already applied Wi-Fi Direct technology on mice. Those mice can directly operate laptops’ functions, transmit directly and display multimedia images, and share directly with other Wi-Fi Direct devices.

High-speed Bluetooth 3.0 strongly debuts

另一方面， 蓝牙技术联盟（Bluetooth SIG）主推的高速蓝牙3.0版本（Bluetooth 3.0＋High Speed）亦不遑多让，强调可无线同步传输包括多媒体影像、视讯和音频等大型档案，兼容以往版本技术且互操作性强。首批使用高速蓝牙3.0的产品最快将在今年底明年初上市。

On the other hand, the Bluetooth Special Interest Group (SIG) mainly push the high-speed Bluetooth 3.0 (Bluetooth 3.0 + High Speed.) High-speed Bluetooth 3.0 is not a weak competitor. It emphasizes on wireless synchronization transmission which may include large files such as multimedia, video and audio. It also is compatible with previous versions of technology and is strongly interoperable. The first products using the high-speed Bluetooth 3.0 will be launched as early as in the end of this year or early next year.

高速蓝牙3.0也是以IEEE 802.11标准为基础，设计802.11的协议转换层（PAL），可藉由802.11 b/g/a的MAC/PHY达到高速传输的目的。值得注意的是，高速蓝牙3.0可藉由radio切换管理设计AMP机制，一般传输利用蓝牙功能，传输高容量数据则利用802.11，来改善Host端传输效能。高速蓝牙3.0所内建的电源管理机制（Enhanced Power Control），可大幅提升节能效果，同时延续蓝牙2.1版＋EDR的多项特性，包括简易安全配对（Simple Secure Pairing）及内建自动安全机制等。

High-speed Bluetooth 3.0 is also based on IEEE 802.11 standard to design 802.11’s Protocol Adaptation Layer (PAL). It achieves high-speed transmission purposes via 802.11 b/g/ a’s MAC/PHY. It is noteworthy that high-speed Bluetooth 3.0 manages Generic Alternate MAC/PHY (short as AMP) by switching radio. General transmission uses Bluetooth; high capacity data transmission uses 802.11 to improve the host-side transmission performance. High-speed Bluetooth 3.0 built-in “Enhanced Power Control” can significantly improve energy-saving efficiency, and continue to have Bluetooth 2.1 + EDR’s many features, including “Simple Secure Pairing” and built-in automatic safety mechanism.

蓝牙技术联盟预估到2010年，高速蓝牙3.0将占所有蓝牙设备的23％，2011年更将迅速攀升至61％。另外根据IMS Research的预估，到2013年时支持高速蓝牙3.0的手持设备将超过3亿台，同时会有约6000万台的PC、3500万台的个人媒体播放器、1.5亿个外接设备以及约200万台数字相机使用高速蓝牙3.0功能。

Bluetooth SIG estimates that by 2010, high-speed Bluetooth 3.0 will account for 23% of all Bluetooth devices. It will rise rapidly to 61% in 2011. Also, according to IMS Research’s prediction, by 2013 handheld devices that support high-speed Bluetooth 3.0 will reach more than 300 millions units. In the meantime, there will be about 60 millions PC, 35 millions personal media players, 150 millions external devices and about 2 millions digital cameras feature high-speed Bluetooth 3.0.

Wi-Fi Direct will launch next year, while Bluetooth is nervous and afraid of the competitor’s impact?

Wi-Fi Direct新规格预计在2010年中期开始实施，届时计算机、相机及手机等电子产品，将不必透过无线网络就能彼此互联。

Wi-Fi Direct’s new specifications are expected to be actualized in mid-2010, by the time electronic products such as computers, cameras and mobile phones can be

Wi-Fi联盟表示，这套新规格将可以让计算机、相机及手机等电子产品，直接透过彼此的Wi-Fi网络互联，不必再经过家中或办公室的无线网络平台进行联机。未来消费者不管是要打印数据、分享影音档案等，都将变的更为简便。

Wi-Fi alliance said that this new specification will allow electronic products such as computers, cameras and mobile phones directly interconnect via each other's Wi-Fi networks. They no longer have to go through the home or office wireless networks to connect. Whether it is printing information, sharing audio and video files, it will be so much easier for future consumers.

目前Wi-Fi联盟的成员包括英特尔（Intel）和苹果（Apple）等。都希望此新技术与设备能在 2010 年中，就顺利进入市场，用户只要透过软件下载，就能将设备直接升级为 Wi-Fi Direct。

Wi-Fi alliance's members include Intel and Apple currently. They both hope this new technology and devices will successfully enter the market in the middle of 2010. Users only need to download software, and they can upgrade the device directly to Wi-Fi Direct.

Wi-Fi联盟亦乐观期待Wi-Fi Direct可带动另一波新兴的Wi-Fi应用风潮。目前规划的Wi-Fi Direct应用将以打印相机相片、分享音乐、同步联络、在电视上显示移动电话图片等为主。目前也已有厂商将Wi-Fi Direct技术应用在鼠标，可运作笔电功能直接传输并显示多媒体图片，并与其他具备Wi-Fi Direct的装置直接分享。

Wi-Fi alliance optimistically expects that Wi-Fi Direct can drive another new wave of Wi-Fi applications. It has been planned that Wi-Fi Direct applications will include camera photos printing, sharing music, syncing, and showing mobile phone pictures on television. Manufacturers already apply Wi-Fi Direct technology on mice. Those mice can operate laptops’ features, transmit directly and then display multimedia images, and share directly with other Wi-Fi Direct devices.

而这套新规格预计最快将在2010年中推出市场，届时经认证达的电子产品，将会加注「Wi-Fi CERTIFIED Wi-Fi Direct」的英文字样。但分析人士表示，Wi-Fi Direct很可能会改变目前的无线连接市场，特别是对蓝牙将会带来不少威胁。

The new standard is expected, at the earliest, in the market in 2010. Then certified electronic products will be marked as "Wi-Fi CERTIFIED Wi-Fi Direct" in English. However, analysts said, Wi-Fi Direct is likely to change the current wireless market; especially it will threat Bluetooth a lot.

Wi-Fi Direct与高速蓝牙3.0都使用Wi-Fi协议转换层或Wi-Fi强化高速传输，双方也都具备双向通讯功能，在功能上具有相当的重迭性。加上蓝牙3.0也把PC和家庭联网等领域视为未来主要应用，与Wi-Fi同样强调可支持多媒体影像、视讯等数据传输，因此在应用上两者也具有一定程度的竞争关系。WLAN芯片设计厂商也因此会以自身在WLAN技术的优势作为基础，强化并表达自己同样在蓝牙3.0也具备相同的特点。

Wi-Fi Direct and high-speed Bluetooth 3.0 both use Wi-Fi Protocol Adaptation Layer (PAL) or enhanced high-speed Wi-Fi. They both equip two-way communication, and overlap on many functions. On top of that, Bluetooth 3.0 also considers the PC and home networking as the future main application areas. Bluetooth 3.0 and the Wi-Fi both stress their support for multimedia images, video and other data transmission. That is why these two have a certain degree of competition.WLAN chip design companies, therefore, will base the WLAN technology’s advantage to strengthen and express that themselves also have the same features in Bluetooth 3.0.

面对高速蓝牙3.0（Bluetooth 3.0＋High Speed），Edgar Figueroa则认为，Wi-Fi Direct直接互通传输已经成熟并准备就绪，可以拓展更多新的Wi-Fi应用领域，他不会对Bluetooth 3.0的发展做出任何评论。但他认为Wi-Fi Direct并不会全面取代路由器或是Access Point等媒介，因为在其他应用领域，还是需要这些Wi-Fi中介装置。

Facing the competition of high-speed Bluetooth 3.0 (Bluetooth 3.0 + High Speed), Edgar Figueroa believes that, Wi-Fi Direct’s direct exchange and transmission have matured and are ready, the Wi-Fi Direct alliance can develop more new Wi-Fi applications. He would not comment on the development of Bluetooth 3.0. But he believes Wi-Fi Direct will not fully replace media such as the routers or Access Point. Because in other applications areas, those Wi-Fi devices are still necessary.

Edgar Figueroa并透露，Wi-Fi Direct技术只是Wi-Fi联盟规划未来项目的其中一项，其他还包括针对大型企业Wi-Fi网络布建的企业版语音计划，以及规定网络存取服务质量的WMM访问控制认证项目。目前值得注意正在研发的技术还包括802.11s网格网络、无线网络管理解决方案、显示解决方案和建立信道直接链路（TDLS）等。Edgar Figueroa并乐观预估，到2011年底前全球Wi-Fi终端装置的出货量将超过10亿台。

Edgar Figueroa also revealed that, Wi-Fi Direct technology is only one of the future projects that Wi-Fi Alliance is planning. There are also projects such as large enterprises’ Wi-Fi network construction for enterprise edition voice plan, and WMM access certification project that specifies Internet access quality. The developing technologies that are noteworthy include 802.11s mesh network, wireless network management solutions, display solutions and the establishment of a “Tunneled Direct Link Setup” (TDLS) and so on. Edgar Figueroa optimistically estimates, before the end of 2011 Wi-Fi end devices worldwide shipments will surpass more than 1 billion units.

《图三 When using Bluetooth solutions, users only need to know whether their products support the Bluetooth function. They can avoid the trouble installing IP port and the driver. 》

Bluetooth 3.0 is the best! Bluetooth fights back against Wi-Fi Direct.

针对Wi-Fi联盟所发表的Wi-Fi Direct相关技术细节，蓝牙技术联盟（Bluetooth SIG）执行总监Michael Foley也表示了看法。Michael Foley表示，Wi-Fi联盟关于Wi-Fi Direct的公告，已让整个无线产业感到困惑。

Toward Wi-Fi alliance’s Wi-Fi Direct released technical details; the Bluetooth SIG Executive Director Michael Foley also expressed his views. Michael Foley said, Wi-Fi alliance’s announcement on Wi-Fi Direct has confused the entire wireless industry.

他指出，不久前，Wi-Fi被认为是无线区域网的最佳技术，而蓝牙无线技术则是最适合无线个人区域网的技术。然而，自802.11和蓝牙射频共同出现在同一设备后，有关如何利用802.11射频改进PAN应用的问题随即产生，但答案就是蓝牙v3.0+HS规格。该规格定义了如何综合运用802.11射频与蓝牙射频，两种射频的综合运用产生了一个完整、高效能的系统，能够令PAN应用中的每项技术均达到最佳性能。

He pointed out that not long ago, Wi-Fi is considered the best technology for wireless local area networks, and Bluetooth wireless technology is the most suitable technology for wireless personal area network. However, since the 802.11 and Bluetooth radio both appear in the same device; it has generated a problem on how to utilize 802.11 radio to improve the PAN application. However, the answer is Bluetooth specification v3.0 + HS. The specification defines how to integrate the 802.11 radio and Bluetooth radio.Both radio’s integrated use have resulted in a complete, high-performance systems capable of enabling PAN application’s each technology to reached the best performance.

Foley强调，蓝牙v3.0+HS规格不使用Wi-Fi，它使用的是IEEE所颁布的802.11射频规格。蓝牙现有的功能已能为用户提供有效且合理的完整解决方案，市面上也已有超过30亿台蓝牙产品，客户对这种技术非常熟悉。

Foley stressed that the Bluetooth specification v3.0 + HS does not use Wi-Fi. It uses the RF specification 802.11 issued by IEEE. Bluetooth current feature can provide effective and reasonable complete solutions for the users. There are already more than 3 billions units of Bluetooth products, and customers are very familiar with this technology.

Foley 指出，Wi-Fi Direct的直接连接技术，其实就是将两项设备连到网络。例如将个人计算机和打印机连接使用以太网的交换器来打印图片，如此这两项设备就可进行网络连接，以及假设已有IP基础建设架构（如DHCP、DNS等），或它们以相同方法自动搜索IP，就能够透过IP进行沟通，但用户仍需为打印机安装IP端口和驱动程序。

Foley pointed out, Wi-Fi Direct’s direct connection technology, in fact, connects the two devices to a network. For example, a personal computer and a printer are connected to an Ethernet switch to print pictures, so that these two devices can be connected to the network. Another method is to assume that IP infrastructure architecture (such as DHCP, DNS, etc.) already exists, or the two devices automatically search for IP in the same way, and then they are able to communicate via IP, but users still need to install IP, printer ports and drivers for the sake of the printer.

他强调，这种做法在家用环境中不是个大问题，因为用户有打印机的驱动程序且安装端口也不会过于繁复。但在大多数情况下，用户家中都会有无线基地台，而用户也会将打印机连接到家里的所有计算机，因此在家用环境下，用户很可能选用无线基地台，而不是Wi-Fi Direct。而在行动环境下，很可能无法获得驱动程序。即使拥有驱动程序，为了一次的打印方便而安装驱动程序，对用户来说也实在过于繁复。

He stressed that this practice in a home environment is not a big problem because users have a printer driver and install the port will not be too complicated. However, in most cases, the user will have a home wireless base stations, and users will also connect the printer to all computers at home, so in a home environment, users are likely to use the wireless base stations, rather than Wi-Fi Direct. And in a mobile environment, a driver may not be available. Even if the driver is available, in order to print conveniently once, a user must install a driver; this is too complicated for the user.

相反地，使用蓝牙技术的两个设备互联，利用的则是标准化定义。对于上述例子而言，只需在待打印的图片上点击右键，并选择「打印」或「传送到」，设备随即搜索到打印机，无须额外安装驱动程序或软件，即可打印图片。

Instead, Bluetooth technology’s two devices interconnect via standardized definitions. For the example above, you simply right click on the picture to be printed, and select "print" or "send to", then the device immediately search for the printer, and there are no additional drivers or software to be installed, you can already print a picture.

Foley 认为，搜索IP服务有多种解决方案，而任何一种方案都可用于简化上述以IP为基础的打印操作。然而，存在多种搜索IP服务的解决方案，却会令用户的操作过于复杂，且众多设备的制造产商，很可能并不使用同一种解决方案，用户也必需要了解其产品所用的方案，并购买兼容的设备。因此，Wi-Fi Direct规格将不会为用户带来太大帮助，反而令用户不得不深入了解，他们的产品究竟是使用UPnP、Bonjour、 DLNA、SLP还是其他技术。反观蓝牙解决方案，用户只需了解他们的产品是否支持蓝牙功能。

Foley believes that there are a variety of search solutions to search for IP services, and each kind of solutions can be used to simplify the IP-based printing operation. However, since there are a variety of solutions to search for IP services, they complicate user's operation too much. Besides, various manufacturers of many devices may not use the same solution, and users must understand each product’s solution, and purchase compatible equipments. Therefore, Wi-Fi Direct specification will not be much of a help for the users; rather, users have to dig into the know-how that whether their products use UPnP, Bonjour, DLNA, SLP, or other technologies. In contrast, for a Bluetooth solution, users only need to know whether their products support the Bluetooth function or not.

Because of the competition of Wi-Fi Direct and the Bluetooth 3.0, USBs suffer

以目前的讯息来看，Wi-Fi Direct技术可让PC、NB、数字相机和手机等电子终端装置，不必透过目前必须的无线网络平台才能进行联机的方式，藉由Wi-Fi Direct技术可自动扫描附近的无线网络区域、以及所有具备Wi-Fi功能的终端装置，将装置之间的链接距离扩大至100公尺，直接透过Wi-Fi便可点对点相互链接，并支持标准的数据传输速率。同时针对企业应用需求，Wi-Fi Direct技术也新增几项安全功能，例如WPA2数据加密及管理选择，来强化企业Wi-Fi网络应用的安全性。

Based on the current information, Wi-Fi Direct technology allows PC, NB, digital cameras, mobile phones and other electronic terminal devices to not have to go through the wireless network platform be connected. Wi-Fi Direct technology can automatically scan the nearby area wireless network, and all terminal devices that have Wi-Fi functions. Wi-Fi Direct technology can expand the connection distance to 100 meters. You can connect peer-to-peer directly through the Wi-Fi. Also, Wi-Fi supports standard data transmission speed. Toward the demand for enterprise applications, Wi-Fi Direct technology has added several security features such as WPA2 data encryption and management options to strengthen the enterprise Wi-Fi network security applications.

以往具备Wi-Fi无线局域网络传输功能的终端装置，必须藉由路由器或是WLAN热点的方式，才能够相互链接，也无法直接相连组成随机（ad-hoc）网络模式。而Wi-Fi Direct技术的创新之处便在于，Wi-Fi Direct装置相互链接的距离，几乎可涵盖所有使用无线宽带的Wi-Fi装置，其能让具有Wi-Fi功能的装置，如电话、相机、打印机、计算机、键盘和耳机等等，单独或多个同时链接其他Wi-Fi装置，确保所有藉由Wi-Fi Direct认证的终端装置都可以快速直接相互链接，路由器装置可能因此功成身退。

In the past, the terminal devices in a Wi-Fi wireless local area network have to go through routers or WLAN hotspot to be interconnected, but they still cannot be directly connected to compose an ad-hoc network. The Wi-Fi Direct technology’s innovation is that Wi-Fi Direct devices’ interconnecting distance covers almost all Wi-Fi devices in the wireless broadband. That feature enables Wi-Fi devices, such as telephones, cameras, printers, computers, keyboards and headsets, etc., (whether they are single-linking or interlinking to other Wi-Fi devices), to be quickly and directly linked with each other via Wi-Fi Direct Certified terminal devices. Therefore, the routers device may retire completely.

Wi-Fi Direct的技术革新，将可让Wi-Fi在短距无线高速传输技术的竞争优势上更具威胁性。因此业界人士普遍认为，Wi-Fi Direct技术的出现，将会严重威胁高速蓝牙3.0（Bluetooth 3.0+High Speed）和USB接口，因为Wi-Fi在传输高容量或是多媒体的视讯数据上的速率并不差，Wi-Fi Direct技术的提升效果可能比蓝牙3.0更快速方便，而蓝牙3.0的效果究竟如何，还需要市场进一步检验，但Wi-Fi应用却已为一般消费者所熟悉，Wi-Fi Direct技术在应用层面上似乎仍具有先天优势。

Wi-Fi Direct technology’s innovation will enable Wi-Fi’s competitive advantage to be become more threatening to its competitors in short-range wireless high-speed transmission technology area. Therefore, the industry generally believes that, Wi-Fi Direct technologies will be a serious threat to high-speed Bluetooth 3.0 (Bluetooth 3.0 + High Speed) and USB interface because Wi-Fi is not bad in high-capacity transmission or multimedia data of video transmission. Wi-Fi Direct technologies’ enhancement outcome may be faster and more convenient than Bluetooth 3.0, convenient.However, Bluetooth 3.0’s effectiveness needs to be further tested in the market, but Wi-Fi applications are already familiar to the average consumers. From this aspect, Wi-Fi Direct technology in the application level seems to have inherent advantages.

况且当前Wi-Fi芯片价格低廉，Wi-Fi Direct很有希望迅速地被应用在无线键盘和鼠标领域，这也可能逐渐降低USB接口的使用频率。再加上用户无须再购买新的硬设备，只要藉由软件升级方式即可达到Wi-Fi Direct的效果，此一方便亲近性又增加了Wi-Fi Direct技术应用的优势。

Moreover, the current Wi-Fi chips are inexpensive, Wi-Fi Direct are promising to be applied rapidly in the wireless keyboards and mice area. Then it may gradually reduce the frequency of usage of USB interface. Plus that the users do not need to purchase new hardware, and only upgrade via software to achieve the Wi-Fi Direct effect. This added convenience increases Wi-Fi Direct technology advantage.

Conclusion

Wi-Fi Direct与高速蓝牙3.0之间的竞争看来势不可免，但双方在技术上各有利弊。Wi-Fi Direct的传输距离覆盖范围比高速蓝牙3.0来得广，传输速率也比较快，软件升级方式也具有相对优势。不过Wi-Fi在便携设备的应用安全性一直备受质疑，安全设计在使用上相对繁复，也会影响网络链接和接收与发射装置间兼容性的顺畅。况且目前使用蓝牙功能的终端装置则已超过20亿组，市场则预估到2011年底前全球Wi-Fi终端装置的出货量才会超过10亿台，因此蓝牙应用的普及也会有助于高速蓝牙3.0的推广深度。

The competition between Wi-Fi Direct and high-speed Bluetooth 3.0 seems unavoidable, but for the two sides, technically speaking, each has advantages and disadvantages. Wi-Fi Direct transmission distance and the coverage are more extensive than the high-speed Bluetooth 3.0’s are. The former’s transmission rate is faster, and the software upgrade method also has a comparative advantage. But Wi-Fi application’s security among portable devices has always been questioned.Wi-Fi’s security design are relatively complex to use and will affect operation smoothness of the network connection and compatibility between the launchers and receivers. Moreover, the terminal devices that currently use Bluetooth devices already reach more than 2 billions units. The market has predicted that by the end of 2011 Wi-Fi terminal devices worldwide shipments will reach more than 1 billion units. Hence, the availability of Bluetooth applications helps promote the high-speed Bluetooth 3.0 in depth.

Wi-Fi Direct与高速蓝牙3.0之间最后谁能脱颖而出，还是各拥一片天，相信在今年Wi-Fi Direct相关产品上市之后，答案将可分晓。

Whether high-speed Wi-Fi Direct or Bluetooth 3.0 can stand out in the end, or each occupies a portion of the market, I believe that answer will be clear after Wi-Fi Direct products are launched this year.