Dear Ines,

May be these journals are suitable for your topic:

1. ACM Journal Pervasive and Mobile Computing (http://dl.acm.org/citation.cfm?id=J991&picked=prox&cfid=600655911&cftoken=64769558)

2. SpringerLink Journal Personal and Ubiquitous Computing (http://link.springer.com/journal/779)

3. IEEE Pervasive Computing (http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?reload=true&punumber=7756)

4. Ubiquitous Computing and Communication Journal (http://www.ubicc.org/)

Good Luck

Thank you a lot Arie