Bluetooth is Service was a communication technology wireless (without the cable) that operated in the frequency tape 2.4 of GHz unlicensed ISM (industrial, Scientific and Medical) by using one frequency hopping tranceiver that could provide the service and the voice of data communication in a manner real-time between host-host bluetooth and the distance of the range of the limited service (around 10 metre).
Bluetooth personally could take the form of card that the form and his function almost be the same as card that was used to wireless local the area network (WLAN) where using the frequency of IEEE standard radio 802.
11, only in bluetooth had the range of the distance of the shorter service and the transfer capacity of the lower data.
Basically bluetooth was created not only to replace or eliminated the use of the cable inside carried out the exchange of information, but also could offer fitur that was good for technology mobile wireless at a cost of that was relatively low, consumption of the low power, interoperability that was promising, was easy in the operation and could provide the service that various things.
To give the picture that was sharper concerning technology bluetooth that was relatively new this to the reader, along with was untangled about the history of the emergence bluetooth and his development, technology that was used in the system bluetooth and the aspect of the service that could be provided, as well as few analyses about the comparison of the modulation method spread spectrum FHSS (Frequency Hopping Spread Spectrum) that was used by bluetooth compared with the method spread spectrum DSSS (Direct Sequence Spread Spectrum).
In May 1998, the champion's 5 companies that is Ericsson, IBM, Intelligence, Nokia and Toshiba formed one of Special Interest Group (SIG) and began to make the specification that was named by them ‘bluetooth’.
In July 1999 the specification document bluetooth the version 1.
0 began to be launched.
In December 1999 was begun again by the production of the specification document bluetooth the version 2.
0 with the addition 4 new champions that is 3Com, Lucent Technologies, Microsoft and Motorola.
At this time, more than 1800 companies in various fields in part in the field semiconductor manufacture, PC manufacture, mobile network carrier, companies automobile and water lines bergambung in a consortium as adopter technology bluetooth.
These foremost companies in part like Compaq, Xircom, Phillips, Texas instruments, Sony, BMW, the Puma, NEC, Casio, Boeing, etc..
Although the Bluetooth SIG standard at this time ‘dimiliki’ by the group of the champion but he will it was hoped become a IEEE standard (802.15).
Protocol bluetooth used a combination between circuit switching and packet switching.
Bluetooth could support a data canal asinkron, three synchronous voice canals simultaneous or a canal where simultaneously supported the data service asinkron and the synchronous voice.
Each voice canal supported a synchronous voice canal 64 kb/s.
The canal asinkron could support the maximal speed 723.2 kb/s asymmetric, where for the direction was the reverse could support up to the speed 57.6 family planning/s.
Whereas to mode symmetrical could support up to the speed 433.9 kb/s.
An equipment that had technology wireless bluetooth will have the capacity to carry out the exchange of information with the distance of the range up to 10 metre (~30 feet).
The system bluetooth provided the communication service point to point and communication point to multipoint.
The product bluetooth could take the form of PC card or USB adapter that was put into equipment.
Equipment that could diintegerasikan with technology bluetooth in part: mobile PC, mobile phone, PDA (Personal Digital Assistant), headset, the camera, printer, router et cetera.
Applications that could be provided by the service bluetooth this in part: PC to PC file the transfer, PC to PC file synch (notebook to desktop), PC to mobile phone, PC to PDA, wireless headset, LAN connection via ethernet access point and etc.
Bluetooth FHSS vs WLAN DSSS
In fact why bluetooth more chose the FHSS method (Frequency Hopping Spread Spectrum) compared with DSSS (Direct Sequence Spread Spectrum).
The reason that made why bluetooth did not use DSSS in part as follows:
1.FHSS needed consumption of the power and the complexity that were lower compared with DSSS this was caused because DSSS used the speed chip (chip rate) compared with the speed of the symbol (symbol rate) that was used by FHSS, so as cost that was needed to use DSSS will be higher.
2.FHSS used FSK where endurance of the disturbance noise relative better compared with DSSS that usually uses QPSK (for IEEE 802.
11 2 Mbps) or CCK (IEEE 802.
11b 11 Mbps).
Although FHSS had the distance of the range and the transfer of the data that was lower compared with DSSS but for the service was supervised 2 Mbps FHSS could give the solution cost-effective that was better.
Bluetooth personally could take the form of card that the form and his function almost be the same as card that was used to wireless local the area network (WLAN) where using the frequency of IEEE standard radio 802.
11, only in bluetooth had the range of the distance of the shorter service and the transfer capacity of the lower data.
Basically bluetooth was created not only to replace or eliminated the use of the cable inside carried out the exchange of information, but also could offer fitur that was good for technology mobile wireless at a cost of that was relatively low, consumption of the low power, interoperability that was promising, was easy in the operation and could provide the service that various things.
To give the picture that was sharper concerning technology bluetooth that was relatively new this to the reader, along with was untangled about the history of the emergence bluetooth and his development, technology that was used in the system bluetooth and the aspect of the service that could be provided, as well as few analyses about the comparison of the modulation method spread spectrum FHSS (Frequency Hopping Spread Spectrum) that was used by bluetooth compared with the method spread spectrum DSSS (Direct Sequence Spread Spectrum).
In May 1998, the champion's 5 companies that is Ericsson, IBM, Intelligence, Nokia and Toshiba formed one of Special Interest Group (SIG) and began to make the specification that was named by them ‘bluetooth’.
In July 1999 the specification document bluetooth the version 1.
0 began to be launched.
In December 1999 was begun again by the production of the specification document bluetooth the version 2.
0 with the addition 4 new champions that is 3Com, Lucent Technologies, Microsoft and Motorola.
At this time, more than 1800 companies in various fields in part in the field semiconductor manufacture, PC manufacture, mobile network carrier, companies automobile and water lines bergambung in a consortium as adopter technology bluetooth.
These foremost companies in part like Compaq, Xircom, Phillips, Texas instruments, Sony, BMW, the Puma, NEC, Casio, Boeing, etc..
Although the Bluetooth SIG standard at this time ‘dimiliki’ by the group of the champion but he will it was hoped become a IEEE standard (802.15).
Protocol bluetooth used a combination between circuit switching and packet switching.
Bluetooth could support a data canal asinkron, three synchronous voice canals simultaneous or a canal where simultaneously supported the data service asinkron and the synchronous voice.
Each voice canal supported a synchronous voice canal 64 kb/s.
The canal asinkron could support the maximal speed 723.2 kb/s asymmetric, where for the direction was the reverse could support up to the speed 57.6 family planning/s.
Whereas to mode symmetrical could support up to the speed 433.9 kb/s.
An equipment that had technology wireless bluetooth will have the capacity to carry out the exchange of information with the distance of the range up to 10 metre (~30 feet).
The system bluetooth provided the communication service point to point and communication point to multipoint.
The product bluetooth could take the form of PC card or USB adapter that was put into equipment.
Equipment that could diintegerasikan with technology bluetooth in part: mobile PC, mobile phone, PDA (Personal Digital Assistant), headset, the camera, printer, router et cetera.
Applications that could be provided by the service bluetooth this in part: PC to PC file the transfer, PC to PC file synch (notebook to desktop), PC to mobile phone, PC to PDA, wireless headset, LAN connection via ethernet access point and etc.
Bluetooth FHSS vs WLAN DSSS
In fact why bluetooth more chose the FHSS method (Frequency Hopping Spread Spectrum) compared with DSSS (Direct Sequence Spread Spectrum).
The reason that made why bluetooth did not use DSSS in part as follows:
1.FHSS needed consumption of the power and the complexity that were lower compared with DSSS this was caused because DSSS used the speed chip (chip rate) compared with the speed of the symbol (symbol rate) that was used by FHSS, so as cost that was needed to use DSSS will be higher.
2.FHSS used FSK where endurance of the disturbance noise relative better compared with DSSS that usually uses QPSK (for IEEE 802.
11 2 Mbps) or CCK (IEEE 802.
11b 11 Mbps).
Although FHSS had the distance of the range and the transfer of the data that was lower compared with DSSS but for the service was supervised 2 Mbps FHSS could give the solution cost-effective that was better.
0 Comments:
<< Home | << Add a comment