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2G DRX parameters

Viewing 6 posts - 1 through 6 (of 6 total)
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  • #60214 Reply
    Pawel Niemyjski
    Guest

    Dear all,

    I do not understand how MS knows when it should turn on the receiver in DRX mode. I know the following parameters:

    BS_PA_MFRMS defining the number of 51-multiframes for the periodicity of PCH subchannel paging decoding. The value is broadcast on BCCH and may range from 3 to 9.

    BS_CC_CHANS defines the number of time slots in TDMA frame reserved for CCCHs (RACHs, AGCHs, PCHs). Am I right?

    CCCH_GROUP allows for determination of the right time slot for specific MS. CCCH_GROUP is a number between 0 and BS_CC_CHANS – 1. Does the ‘right time slot’ concerns the time slot within TDMA frame?

    Moreover,there are several paging subchannels in the same physical channel carrying the CCCH identified by a CCCH_GROUP, the MS will determine the right paging subchannel for paging blocks according to the parameter PAGING_GROUP.

    My problem is, how does MS know it should turn on the receiver on 2,4,6 etc. 51-TDMA multiframes instead of 1,3,5 etc. 51-TDMA multiframes?

    Thank you for any replies.

    Thank you in advance.

    Kind regards,
    Pawel Niemyjski

    #60215 Reply
    Bijoy
    Guest

    Hi Pawel
    Try reading ETSI EN 300 908 V8.5.1 (2000-11).

    You will get all your answers

    Br\\
    Bijoy

    #60216 Reply
    Pawel Niemyjski
    Guest

    Thank you. I have been reading this document many times before posting but now I understand what I wanted.

    It is not easy subject.

    BR

    #60217 Reply
    Bijoy
    Guest

    Yes ,that’s for sure.But we can still discuss if any doubts still prevail.The chapter is too good.

    #60218 Reply
    Pawel Niemyjski
    Guest

    Anyway, MS after IMSI attach has to enter non-DRX mode to detect its paging group? Am I right? It is my assumption but it is logical.

    BR,
    Pawel Niemyjski

    #60219 Reply
    Bijoy
    Guest

    Hi
    What is your logic
    as paging group can be detected in DRX mode too

    Br\\
    Bijoy

Viewing 6 posts - 1 through 6 (of 6 total)
Reply To: 2G DRX parameters
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