Cellphone useful information

What The Hell is Bluetooth?!

Most filipino cellphone users these days always use bluetooth mainly for file transfer but almost 80 or 90% of them don't realy know what bluetooth is, A usual thing they will say is "its a feature for connecting a phone to another wirelessly" well thats when crab mentality sucks in. But me no way i have one life to live and i want to know all the things i could before it all ends for me so ill share some information to you guys..

Bluetooth is a wireless protocol utilizing short-range communications technology facilitating data transmission over short distances from fixed and/or mobile devices. The intent behind the development of Bluetooth was the creation of a single digital wireless protocol, capable of connecting multiple devices and overcoming problems arising from synchronization of these devices. Bluetooth uses a radio technology called frequency hopping spread spectrum. It chops up the data being sent and transmits chunks of it on up to 75 different frequencies

its maybe similar to wifi but theres a difference to wifi provides higher throughput and covers greater distances, but requires more expensive hardware and may present higher power consumption. But in bluetooth no need for cables and very high power consuming devices you just need a cellphone.

here are some versions of bluetooth maybe your phone has one take a looka at the these:

Bluetooth 1.1

• Ratified as IEEE Standard 802.15.1-2002.
• Many errors found in the 1.0B specifications were fixed.
• Added support for non-encrypted channels.
• Received Signal Strength Indicator (RSSI)

Bluetooth 1.2

This version is backward-compatible with 1.1 and the major enhancements include the following:

• Faster Connection and Discovery
• Adaptive frequency-hopping spread spectrum (AFH), which improves resistance to radio frequency interference by avoiding the use of crowded frequencies in the hopping sequence.
• Higher transmission speeds in practice, up to 721 kbit/s, as in 1.1.
• Extended Synchronous Connections (eSCO), which improve voice quality of audio links by allowing retransmissions of corrupted packets, and may optionally increase audio latency to provide better support for concurrent data transfer.

Bluetooth 2.0

• Three times faster transmission speed — up to 10 times (2.1 Mbit/s) in some cases.
• Reduced complexity of multiple simultaneous connections due to additional bandwidth.
• Lower power consumption through a reduced duty cycle.

Bluetooth 2.1

• Extended inquiry response: provides more information during the inquiry procedure to allow better filtering of devices before connection. This information includes the name of the device, a list of services the device supports, as well as other information like the time of day, and pairing information.

• Sniff subrating: reduces the power consumption when devices are in the sniff low-power mode, especially on links with asymmetric data flows. Human interface devices (HID) are expected to benefit the most, with mouse and keyboard devices increasing the battery life by a factor of 3 to 10. It lets devices decide how long they will wait before sending keepalive messages to one another. Previous Bluetooth implementations featured keep alive message frequencies of up to several times per second. In contrast, the 2.1 specification allows pairs of devices to negotiate this value between them to as infrequently as once every 5 or 10 seconds.

• Encryption Pause Resume: enables an encryption key to be refreshed, enabling much stronger encryption for connections that stay up for longer than 23.3 hours (one Bluetooth day).

• Secure Simple Pairing radically improves the pairing experience for Bluetooth devices, while increasing the use and strength of security. It is expected that this feature will significantly increase the use of Bluetooth

there you have it some useful cellphone information about bluetooth hope it helps add a bit of sense and humour on your daily lives.