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In Part 1 of this series (JDJ, Vol. 7, issue 6), I showed how I developed an MP3 player in Java, and then added the ability to control that player from a wireless handheld device using a PersonalJava application. While I could only stop, pause, adjust the volume, and select the next track to be played, I still found the application useful, but not yet perfect... The first problem to be addressed was the combinations you can get when listening to your entire music collection at random. When a nice relaxing Enya track fades out and you find yourself launching into the world of Eminem, the shock can be considerable, not to mention that sometimes I'm just not in the mood for Aztec Camera...but have no preference beyond that. So, some sort of weighting is needed. My next problem was the networking side of things. Wireless Ethernet is nice, but not ideal on the iPaq. In ad... (more)

Whole House Audio from the Palm of Your Hand

Parts 1 and 2 of this series (JDJ, Vol. 7, issues 6 and 9) demonstrated how I developed a remote control MP3 player by using a Bluetooth connection from my handheld (a Compaq iPaq) and employing a client and a server written in Java. Tracks were weighted to increase (or decrease) their chances of playing, and each track had a preferred track that followed, so the system would generally play two or three tracks from a particular album before moving on to the next one. The system works pretty well, even though a recent ripping session increased the tracks available to around 3,000 ­... (more)

Bluetooth Revealed & The McGraw-Hill Illustrated Telecom Dictionary

Bluetooth Revealed: The Insider's Guide to an Open Specification for Global Wireless Communications reviewed by Bill Ray Authors: Brent A. Miller, Chatschik Bisdikian, Anders Edlund Publisher: Prentice Hall ISBN: 0-13-090294-2 Paperback: 320 pages Bluetooth is a new protocol designed to replace the tangle of wires that seems to accompany all technical advances.  Operating over radio, it's not limited to line-of-sight and is destined for everything from keyboard connections to wireless Internet surfing. Clearly a standard was necessary to achieve the ubiquity it needed. Thus the Blu... (more)

21st Century Wireless Tools: Working in a Networked World…

Companies are always risking their business, betting on what will be happening next year, and how they can make money out of it. The trick is to get it right. We all know that we work in a fast-moving industry. Even before wireless communications raced ahead, the IT field was already moving too quickly for most industry commentators - fast enough in fact to make a fool of anyone rash enough to try to predict future developments. From the famous IBM statement that the total world market for computers amounted to no more than 20 units, to Bill Gates saying that no one could ever... (more)

Making Money from Messages

Short Message Service (SMS) has been the unpredicted golden goose of mobile telephone networks, with more than a billion messages flying through the airwaves every month over the GSM network alone. Even at a few cents a message it's not difficult to see how SMS might be the solution to the growing debt problem faced by companies that massively overbid for 3G licenses... at least until 3G starts to make some money. MS messages don't tend to overload the network. Being non-time critical means that delays during peak times can be tolerated. While a network may regret a campaign to g... (more)