| Gość |
 Wysłany: Wto 0:44, 16 Lis 2010 Temat postu: ugg boots cheap Bluetooth wireless access technolo |
|
Bluetooth wireless access technology and its applications
Several operating modes according to actual needs, the device is connected to air under the technical theory and practice of measurement of 11 to stay in four different energy-consuming mode. 1) Active mode (Active) At this point the device to maintain synchronization with the master. Even without the information to be transmitted, the master periodically need to send an empty packet from the device. Air bag does not contain valid information load, only header and channel access code. 2) mode (Sniff) now in the master device from the device through the Link Management Protocol sniff instructions issued under the effect of reducing the detection time and number of the master, is an energy saving way. 3) Hold Mode (Hold) in the connection state, work in the ACL link is placed from the device can hold mode. At this point from the device to maintain the AM-ADDR address. ACL no longer provide service, but still provides SCO link services. 4) Sleep mode (Park) from the device at its main equipment under the command of several link management into hibernation. Sleep mode is assigned a sleep from the device component and the access request address PMADDR address, and AM-ADDR address no longer need to give up. Sleep mode in the Bluetooth component will periodically wake up one slot to another to keep pace with the master device, and check whether the master device has associated with paging or broadcast information sent. Master by using navigation information (Beacon), can always wake up (Wake-up) Sleep in the slave. 4 Conclusion The above text describes the Bluetooth system in the process of sending and receiving the control points. According to actual needs, Bluetooth, paging and response in initiating the two occasions, different access methods can be arranged. The current transfer rate of Bluetooth in terms of data and voice although adequate, but more will inevitably lead to additional costs additional bit increases,ugg boots cheap, which will make the actual effective data rate greatly reduced. In order to transmit multimedia information, looking for a higher rate or bandwidth, Bluetooth has become a priority. This should be the future of Bluetooth technology, key issues to be solved. References 1 Section Kyushu Bluetooth (Bluetoothl technology and its applications. Henan Institute of Communications Wireless Communications Committee of the 16th Annual Meeting Proceedings [c20002Ericssian, e \. (http # / / www.bluetoothtom) 3Eriessionte \of the year 1999 National Conference on Wireless and Mobile Communications Proceedings Ec3,ugg Boots Billig, i9995 Peng Weijun GMSK in hip and other communications of Britain and of the fence of [J]. Communications ,2000.212001-04-16 Received ashamed by Jane l: section 49, an associate professor in Kyushu Institute of Wireless Communication Committee of Henan Province, the vice chairman since 1980 in the electronic technology such as wood and teaching communication theory, the question 1l articles published in professional papers, open a sampan works six seven thousand seven hundred seventy-seven七七 七七 七七 7,777,777,777,777,777 7,Moncler cheap,777,777,777,777,777,777 Instruction ◇ ◇ \\Chinese Academic Journal (CD) \about 3000 words or more, please High School English abstract, keywords. 2, please indicate the age, title,ugg boots günstig, address, zip code 3,North Faces on sale, please use the legal units of measurement, and confidential review by the subordinate units. 4. refundable contributions, Notification of acceptance is not received within three months of self-dealing (also cast it s). article is required upon republication pay royalties to the author and send sample issues instructions from two. contributions should be sent: Beijing 1066 mailbox, air measurement technology magazine. Zip Code: 100095
相关的主题文章：
ugg boots cheap Waterproof camera _953 big screen
ugg boots cheap Combinational circuit pseudo-exhau
Moncler cheap Without phase ambiguity BPSK digital modulation and demodulation _ |
|
