Bluetooth and wireless local area networks fight? 01-6-5 afternoon 04:02:57
In the past two years, Bluetooth technology and Bluetooth products have made the merchant and the media's speculation, almost all overnight, and unstoppable. Bluetooth technology acts as a short-range wireless connection technology, is indeed widely widely used in its unique superiority and flexibility, so that Bluetooth technology will replace wireless local area network technology debate. So, whether the Bluetooth technology constitutes a threat of mature wireless local area network technology, and it has an edition? This paper answered this issue through comparison and analysis of these two technologies.
The focus of people's debate is whether the Bluetooth protocol will replace the WLAN standard (802.11). Bluetooth technology is a wireless connection technology that has been developed in a short-distance connection technology; the WLAN IEEE 802.11b wireless Ethernet standard is a wireless network that applies to large-scale office or business park as design goals. Standard, and mature. So, I think it is Bluetooth technology and WLAN technology to have a long walk in wireless connection technology, and there is a short, respectively, from their future development direction and trends, they will not be enough. A threat.
In fact, the development of Bluetooth technology has been nearly hysteresis, and this is the main reason for this situation is due to product development (Bluetooth technology is a new technology) due to product manufacturers to spend a lot of time. At the same time, wireless local area network technology based on mature 802.11b protocol is maintained in a strong development momentum. Therefore, the correct development direction of the Bluetooth product industry should give full play to the technical advantage of replacing cable connections in a short distance, which is committed to embedding its products (such as personal digital assistant PDA, etc.). It is also its main market development direction.
It is widely believed that Bluetooth technology is a low-power, cost-effective and fruitful short-range wireless connection scheme that is suitable for embedding personal hand-filled digital devices. Early prediction of Bluetooth technology products:
● The price of Bluetooth chips (excluding interface software costs) to 2003 will be around $ 5 from now about $ 20.
● A Bluetooth chip, its effective communication ranges from 10 meters, and the power consumption is about 1MW; the WLAN chip that meets the 802.11b protocol specification, the power consumption is 1W.
● Small size, a single Bluetooth chip size is about 8x8mm, and the corresponding WLAN chip is 30x14mm.
● Bluetooth technology and WLAN technology are the same, all 2.4GHz, but Bluetooth technology uses frequency hopping technology, flushed 1600 times per second, which is superior to 802.11b wireless local area network technology.
● Bluetooth products are expected to be embedded in 10 million end user equipment this year, while WLAN products are only about 4.3 million.
But in fact, there are fewer gaps that are less than the reality. First, the decline in the price of Bluetooth chip is excessively exaggerated. In fact, the decline in Bluetooth chip is not as fast as people expect, and recently, according to authoritative experts, end-user equipment with Bluetooth technology function is only 2,000 this year. thirty million. At the same time, in the challenge of Bluetooth technology products, WLAN product manufacturers have increased product research and development, and their product prices are expected to fall around $ 5 in 2003. In addition, Bluetooth products have interoperability issues, and this problem is not only in the physical layer, but also exists in the application layer. For Bluetooth technology, resolve this issue and take a paragraph.
Experts in Wireless LANs predict that in order to avoid potential wireless interference with Bluetooth products and to reach the transmission speed to 24Mbps, WLAN's operating frequency may be transferred to 5GHz in 2004. Compared with 11Mbps currently 802.11b, the maximum transmission rate of Bluetooth products is only 721kbps. Therefore, in order to download large capacity information to the portable computer or PDA from the Internet, in order to realize the transmission of video data streams, the most likely to take the connection technology is WLAN technology. In addition, Bluetooth technology is impossible to develop into a network technology, because in order to ensure the mobility of Bluetooth technology products, its node access capabilities are restricted to some extent. Several product manufacturers have solved data communication issues in mobile, but real-time mobile voice communications is still in the development phase.
Finally, the laptop of the Bluetooth technology product can be accessed directly, not by accessing nodes and company firewalls, this is a sharp growth momentum to the demand for personal firewalls. The security standards for the Bluetooth technical protocol are further improved, and the current Bluetooth technical equipment can be identified mutual, but whether the user is legal user cannot be identified. Therefore, the security standards for the Bluetooth protocol must be improved to truly implement the security of their information.
In certain wireless technology applications, Bluetooth technology has significant advantages, such as speech communication. In such an environment in the office or home home, the range of wireless communications is generally not more than 10 meters, and the cordless phone can be used. WLAN technology must have VoIP technology to implement voice communication, which is not easy to implement.
Therefore, Bluetooth technology should not initiate challenges that have been proneously mature, but should be committed to implementing wireless connections within a short distance to replace cost-high cables, and to solve several of the most basic technical issues as soon as possible. Operation problems, security issues, etc.
A more successful company will quickly develop the corresponding application, installed in a portable device embedded in the Bluetooth chip in place of the cable. An earlier example is the BLIP product of Ericsson Company. Blip is a small Bluetooth transceiver, which can send a message to the shopper or send product information from the billboard to possible consumers. The product is expected to be listed this summer, and it is priced at about $ 500.
In the near future, not only the portable communication device will have Bluetooth function, but other electronic consumer products such as MP3 players, digital cameras, and gaming machines will have Bluetooth. These devices will be activated by the Bluetooth technology product identification information from the connector or expansion slot such as a USB port or a PCMCIA slot. However, this technology will be embedded in these products itself. It can be envisioned that several game players can get a multi-player game with several game players to connect their game devices in a wireless manner.
In any case, people must believe that Bluetooth technology will become next-generation wireless access technology. Smart merchants should start the main energy to develop the main energy to the development of the end user application, and these applications will replace the connecting cables and embedded in millions of portable electronic devices.
