Yep. basically. This is kind of curious, since UMTS (Cingular^H^H^H^H^H^H^H^HAT&T "3G") uses a CDMA-like scheme. Of course I'm pretty sure in practice TDMA is less "intensive" (read: power consumption) that CDMA, which may have entered their considerations.
Cheers cc On Thu, Sep 18, 2008 at 8:45 AM, Charles Wyble <[EMAIL PROTECTED]> wrote: > > If I am reading that right, it's TDMA correct? > > If so Berkeley is doing research in this area and developed a software > stack for it: > http://tier.cs.berkeley.edu/wiki/Wireless > > > > > Joe Christensen wrote: >> Hello all, >> >> Great meeting last night. One of the items unresolved was our >> discussion of WIMAX and how it controls access to the network. I >> looked it up on wikipeda and confirmed that WIMAX uses a time-slot for >> each client, thus preventing one node from hogging the signal or data >> collisions between clients. This is a big enhancement from wifi. >> >> From wikipedia: (http://en.wikipedia.org/wiki/WiMAX) >> "In Wi-Fi the media access controller (MAC) uses contention access — >> all subscriber stations that wish to pass data through a wireless >> access point (AP) are competing for the AP's attention on a random >> interrupt basis. This can cause subscriber stations distant from the >> AP to be repeatedly interrupted by closer stations, greatly reducing >> their throughput. This makes services such as Voice over IP (VoIP) or >> IPTV, which depend on an essentially-constant Quality of Service (QoS) >> depending on data rate and interruptibility, difficult to maintain for >> more than a few simultaneous users. >> >> In contrast, the 802.16 MAC uses a scheduling algorithm for which the >> subscriber station needs to compete only once (for initial entry into >> the network). After that it is allocated an access slot by the base >> station. The time slot can enlarge and contract, but remains assigned >> to the subscriber station, which means that other subscribers cannot >> use it. In addition to being stable under overload and over- >> subscription (unlike 802.11), the 802.16 scheduling algorithm can also >> be more bandwidth efficient. The scheduling algorithm also allows the >> base station to control QoS parameters by balancing the time-slot >> assignments among the application needs of the subscriber stations." >> >> >> >> Cheers, >> >> Joe >> >> On Sep 15, 2:39 pm, "Michael Weinberg" <[EMAIL PROTECTED]> >> wrote: >> >>> Hello all, >>> >>> The next PTP meeting will be this Wednesday at 6:30pm at the Green >>> Dragon on SE 9th and Yamhill. Let's gather outside in the nice patio >>> area. >>> >>> You can post meeting items here, or just show up and share what's on your >>> mind: >>> >>> http://www.personaltelco.net/WeeklyMeeting20080917 >>> >>> -- >>> Michael Weinberg >>> President >>> Personal Telco Project, Inc. >>> A 501(c)(3) Non-Profit >>> >> > >> > > > -- > Charles Wyble (818) 280 - 7059 > http://charlesnw.blogspot.com > CTO Known Element Enterprises / SoCal WiFI project > > > > > -- Chris Chen <[EMAIL PROTECTED]> "I want the kind of six pack you can't drink." -- Micah --~--~---------~--~----~------------~-------~--~----~ The Personal Telco Project - http://www.personaltelco.net/ Donate to PTP: http://www.personaltelco.net/donate Archives: http://news.gmane.org/gmane.network.wireless.portland.general/ Etiquette: http://www.personaltelco.net/index.cgi/MailingListEtiquette List information: http://lists.personaltelco.net To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] -~----------~----~----~----~------~----~------~--~---
