Solved

cell phone direct communication without base station?

Posted on 2004-10-13
6
313 Views
Last Modified: 2008-02-01
Hi all,

    I am wondering if there is this kind of cell phones that can communicate with each other directly without base station. Broadcasting is enough, no need for point-to-point communication. That is, one cell phone broadcasts, all the other cell phones within the radio range can receive that message? If there exists such kind of cell phones, can I program their functionality? That is, I write program to instruct the message format to send, just like TCP socket programming? Many thanks.

Best,
Soccer
0
Comment
Question by:summer_soccer
  • 2
6 Comments
 
LVL 2

Expert Comment

by:nukeme369
ID: 12305066
What your talking about is frequently referred to as point-to-point radio.  Otherwise known as walkie talkies or CB radios.  Less frequently known as Amateur Radio.  We hams often use data communications often including TCP comms.

What I think you may be wanting to do is to broadcast a signal, possibly data, and have other devices receive said data.
0
 

Author Comment

by:summer_soccer
ID: 12305078
Thanks for your explanation. But I want to know if any current cell phone support this kind of walkie talkie. If there are some do, then those people carrying them can use this kind of radio for some emergency situation.
0
 
LVL 2

Expert Comment

by:nukeme369
ID: 12309250
OIC, I am not aware of any cell phones which do broadcasting.  The only devices which support any kind of walkie-talkie feature include devices on the Nextel network (Motorola's mostly) and I know I've heard of another doing so.  The problem is that it works just like a cell phone on transmit.  It speaks to the cell tower to reach the destination.

Duct tape a 47mhz walkie talkie to your cell phone I suppose LOL.
0
 
LVL 36

Accepted Solution

by:
grblades earned 50 total points
ID: 12734336
The only mobile technology is PTT (Push To Talk). Here are a few links:-
http://www.newscientist.com/news/news.jsp?id=ns99994575
http://www.nokia.com/nokia/0,8764,46740,00.html
http://www.wired.com/news/business/0,1367,60554,00.html
You can only transmit in one direction and it is really for voice only.

What sort of range are you after?
0

Featured Post

New! My Passport Wireless Pro Wi-Fi Mobile Storage

Portable wireless storage to offload, edit, and stream anywhere.

High-capacity, wireless mobile storage designed to accompany professional photographers and videographers in the field to easily offload, edit and stream captured photos and high-definition videos.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Decrypting SSL traffic in wireshark 7 91
SD - WAN 2 44
Which is more secure: EAP or machine certificate for IKEv2 VPN? 1 41
Sonicwall blocks a site 49 56
Even if you have implemented a Mobile Device Management solution company wide, it is a good idea to make sure you are taking into account all of the major risks to your electronic protected health information (ePHI).
Join Greg Farro and Ethan Banks from Packet Pushers (http://packetpushers.net/podcast/podcasts/pq-show-93-smart-network-monitoring-paessler-sponsored/) and Greg Ross from Paessler (https://www.paessler.com/prtg) for a discussion about smart network …
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now