Generic selectors
Exact matches only
Search in title
Search in content

DTX

Viewing 6 posts - 1 through 6 (of 6 total)
  • Author
    Posts
  • #54821 Reply
    DTX
    Guest

    dear
    can any body help me in TEMS layer 3 where can i find message show DTX is working or not

    #54822 Reply
    pix
    Guest

    i don’t think that’s a layer 3 msg, but maybe i’m wrong.

    #54823 Reply
    DTX
    Guest

    pix
    if it is not in layer 3msg we can see in trace? which interface?

    #54824 Reply
    Michele
    Guest

    Hi DTX, you can find that information (enabling on DL and UL respectively on half rate/full rate channels…) into the Cell Option IE of the System Information Type 3 and System Information Type 6.

    The real usage on MS side on the current SACCH period is communicated to the network into the Mesurement Result message

    Regards

    #54825 Reply
    pix
    Guest

    michele,

    but within one SACCH period (480ms), there could be some DTX (SID) frames and some actual speech frames, isn’t it ? If that’s the case, how to know how many times DTX was used within 480ms? (= 24 speech frames)

    I forgot the details…

    #54826 Reply
    Michele
    Guest

    Hi Pix, you’ll be able to know the number of speech frames received by MS on a SACCH period only if Enhanced measurement Report are enabled on that cell. In fact the IE field NBR_RCVD_BLOCKS contains that information. The field DTX_USED instead informs BTS/BSC about the use of DTX in UL (on mS side) on the current SACCH perion. This information is fundamental for BTS: if DTX was sed by MS, BTS has to evaluate the SUB measurement set; if instead DTX was not used into the current SACCH period, BTS has to evaluate the FULL measurement set.

    A remark: NBR_RCVD_BLOCKS is the number of correctly decoded speech frames on MS side. It can be < 24 also in case DTX was not used in DL, but there is interference on the DL link. BTS/BSC knows the right number of frames transmitted in DL, so it's able to perform the correct measurements. Regards, Michele

Viewing 6 posts - 1 through 6 (of 6 total)
Reply To: DTX
Your information:




<a href="" title="" rel="" target=""> <blockquote cite=""> <code> <pre class=""> <em> <strong> <del datetime="" cite=""> <ins datetime="" cite=""> <ul> <ol start=""> <li> <img src="" border="" alt="" height="" width="">