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Thread: Difference between Scrambling code and Channelization code

  1. #1
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    Default Difference between Scrambling code and Channelization code

    Dear Everybody,

    Could someone explain in layman term what is the difference between Scrambing code and Chanelization code in UMTS? I am confused after reading from the internet.

    Thanks.

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  3. #2
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    Default Re: Difference between Scrambling code and Channelization code

    Quote Originally Posted by arban View Post
    Dear Everybody,

    Could someone explain in layman term what is the difference between Scrambing code and Chanelization code in UMTS? I am confused after reading from the internet.

    Thanks.
    Scrambling code is used to make differntiation for cells and Channalization code is used to make differentiation of service between MS in the same physical channel.
    BR
    RF

  4. #3
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    Default Re: Difference between Scrambling code and Channelization code

    Quote Originally Posted by RF engineer View Post
    Scrambling code is used to make differntiation for cells and Channalization code is used to make differentiation of service between MS in the same physical channel.
    BR
    RF
    Thanks bro for the prompt reply. can a user have more than one chanellization code in softer handover? thanks.

  5. #4
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    Default Re: Difference between Scrambling code and Channelization code

    Quote Originally Posted by arban View Post
    Thanks bro for the prompt reply. can a user have more than one chanellization code in softer handover? thanks.
    normally multiple scrambing code give more channelization code per sector.

  6. #5
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    Default Re: Difference between Scrambling code and Channelization code

    hi,....
    you are doing good.
    keep it up and thanks for sharing

  7. #6
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    Default Re: Difference between Scrambling code and Channelization code

    ammmmm.... channelization codes are parameters that can be adjusted if you want to increase the throughput in HSDPA or 3G

  8. #7
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    Default Re: Difference between Scrambling code and Channelization code

    Hope below helps!!!

    same in breif...

    both (different types) scambling code & ovsf codes are used in DL & UL.

    scambling codes:

    + In Downlink

    They are used to identify node-b sectors/antenna in DL.There are two type of scambling codes in DL PSC & SSC.

    Primary scarmbling code (PSC) - a sector is identifed by the same.

    There are total 512 primary scarmbling codes only one PSC/sector.these 512 codes are divided in a group of 64 ,each containing 8 PSC.MS looks for the CPICH channel which carries PSC for that specicfc cell to identify that sector.

    Secondary scarmbling code - there can be many ,normally used in beamforming cases.


    + In Uplink

    in uplink the each MS is uniquly idenified by the long scambling code,which it gets during RRC_con_setup.


    OVSF CODES:

    + In Downlink

    They are used to channalize the subscribe in Downlink ,also the Spreading facor or the length of the code also decide the speed of teh channel.smaller the length higher data can be transmitted & vice-versa.

    + In Uplink

    different ovsf code length on control & data channel.

  9. #8
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    Thumbs up Re: Difference between Scrambling code and Channelization code

    Channelization Codes:
    UL :to Separate Physical n control data from same terminal
    DL:To separate connection to diff terminals in same cell

    Scrambling Codes:
    UL: Separate diff users
    DL: Separate Diff Node Bs.

  10. #9
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    Default Re: Difference between Scrambling code and Channelization code

    can any one support me to provide the 3G basic docs, How the technology works & what thing affect the output with terms details.

    Thanks in advance. Kindly support.

  11. #10
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    Default Re: Difference between Scrambling code and Channelization code

    SC=for NodeB to separate the cells
    I believe the channelization you are saying was the UARFCN..its the channel for UL and DL

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