Nueva especificación Bluetooth 3.0HS
Lo primero que he pensado cuando he visto la noticia del Bluetooth 3.0HS en Internet de Nueva Generación, era que habían sacado un nuevo tipo de chip bluetooth mucho más rápido. Nada más lejos de la realidad (aunque si más cerca del título del post :P)
De lo que estasmo hablando aquí es de una nueva especificación del core bluetooth que hará uso, no sólo del bluetooth, sino también de la conectividad wifi si ambos dispositivos cuentan con ella.
Después de leer el post, escribir éste (si, ésto va escrito después del resto del post, hmm… «post post»? xD) y darle un par de vueltas más con casos hipotéticos he tenido que cambiar el inicio porque he cambiado un poco de idea.
La idea del balanceo de carga es más vieja que el sol, pero metida en éste contexto renace bastante y parece una muy buena solución para las cantidades de información con las que nos movemos actualmente (y que van en sentido creciente).
No voy a divagar más sobre mis ideas internas y vamos a ver de que va.
¿cómo funciona?
Lo que proponen en ésta nueva especificación es aplicar a la transmisión de datos un balanceo de carga entre la conexión bluetooth y la conexión wifi. De ahí que diga que es una idea vieja, desde que apareció el balanceo de carga anda que no ha llovido…
El funcionamiento básico se resume en ésto:
- Voy muy lento? Empiezo a transmitir por wifi
- Voy bien o me sobra ancho de banda? Me quedo sólo con la conexión por bluetooth.
¿las ventajas?
Pues que no tendremos que actualizar el hardware, según lo veo yo podría ser solamente una actualización del driver usado. Como bien dicen la mayoría de los dispositivos portátiles, más o menos nuevos, que hay en el mercado vienen ya tanto con chip bluetooth como con chip wifi. En caso de uno de los dispositivos no disponga de wifi siempre podríamos mantener la retrocompatiibilidad al usar sólo la conexión bluetooth.
La velocidad. Según dicen en el artículo se pueden llegar a los 24Mbit/s, mientras que el bluetooth actual sólo alcanza los 3Mbit/s. Iríamos 8 veces más rápido, pero a la mitad de velocidad que usando directamente una conexión wifi normalita de las de hoy en día (una 802.11g va a 54Mbit/s).
La batería. Por lo que dicen, el uso de ésta especificación permite ahorrar batería. Yo no lo veo tan claro. De primeras, se utilizan dos conexiones (que tienes que gestionar tirando de CPU y memoria), se utilizan dos dispositivos hardware distintos (y encima una wifi, que anda que no chupa energía). PERO, ésto puede tener su punto de razón a partir de cierto humbral de cantidad de datos. Me explico: si para pasar un fichero por bluetooth necesitamos mantener la conexión abierta durante 8mins (para que cuadren las cuentas) y utilizando ambas sólo tenemos que tenerlas abiertas 1min (según la relación propuesta teóricamente) puede que se produzca un mejor uso de la energía y la batería nos dure más.
¿las desventajas?
La principal es la utilidad que se le puede dar. Si tengo una red wifi en casa y el dispositivo que puede hacer uso de ésto tiene wifi…. ¿voy a usar el bluetooth? Con la conexión móvil a internet, que empiezan a ser asequibles y a proliferar por todos lados… ¿me merece la pena pasarlas al ordenador para luego subirlas? ¿o me viene mejor subirlas directamente y bajarlas si las quiero tener en el ordenador? ¿tenemos más material online o en el ordenador?
Luego está la limitación de distancia, que pasa a ser de 3metros. No dicen nada de los obstáculos intermedios, pero con esa limitación… promete reaccionar muy mal a ellos aunque tampco podrá haber muchos en tan poco espacio xDD
Eso nos lleva a plantearnos más preguntas sobre la usabilidad… si estoy tan cerca como para enchufar un cable usb cómodamente y encima tengo una red wifi disponible… ¿voy a utilizar el bluetooth? ¿para qué?
Conclusión.
Sólo le veo una buena utilidad a todo ésto, y ahora me doy cuenta de que quizás todo ésto iba por aquí… Creo que queda más claro con un ejemplo:
Mi amigo rafita tiene en su móvil un vídeo de sus vacaciones, unos 300Mb digamos, estamos tomando unas cañas y me lo quiere pasar para que pueda verlo en casa. Por bluetooth sería implanteable directamente, más que nada, porque antes acabaríamos tan tajados de tantas cañas que ni veríamos si se ha pasado ya o no xDD
En ese caso si que es útil que su dispositivo y el mío utilicen las dos conexiones, ya que, el bluetooth, con sólo darle a enviar configuraría, por si sólo, una conexión wifi ad-hoc entre ambos dispositivos para que el vídeo se pase lo antes posible. Tiempo estimado: una caña, lo justito para poder coger el coche y llegar a casa entero para ver el vídeo 😀
En definitiva, ¿es útil? ¿ha merecido la pena? Si, pero únicamente en casos como el explicado. Un paso más hacia la movilidad multimedia.
Entoces esto quiere decir que no es para transmicion de archivos como en los celulares; y solo sera usado para transmicion de datos. ¿Es correcto o no?
O lo que pueden hacer con tu amigo Rafa es transmitir el archivo directamente por WiFi (con Android tenés mil programas que te lo permiten), al tiempo que toman la misma caña, y encima tenés tiempo para ver los primeros minutos del video e irte entusiasmado a tu casa.
Además, los coches que vienen con BT para el estereo, no tiene WiFi también en el estéreo, que debe ser el principal uso del BT en estos días.
Igual es bueno saber la noticia.
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