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Thread: UE category and Maximum spatial layer support

  1. #1
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    Default UE category and Maximum spatial layer support

    Hi, Is there anyone know about "Maximum number of supported layers for spatial multiplexing in DL" which been defined in 3GPP

    According to the column, what do they mean "2 or 4"?
    For instance, Does it mean UE Cat6 can have to types of UE which support 2 and 4 layer?

    http://www.3gpp.org/keywords-acronyms/1612-ue-category

    Thx
    Last edited by RFNuttapon; 2018-05-02 at 04:36 PM

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    Default Re: UE category and Maximum spatial layer support

    Good afternoon! Your drawing is not visible! Can you update it again?

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    Default Re: UE category and Maximum spatial layer support

    Quote Originally Posted by slava121 View Post
    Good afternoon! Your drawing is not visible! Can you update it again?
    Hi I cannot paste the picture, but just wonder about the column "Maximum number of supported layers for spatial multiplexing in DL" which stands for the number of mimo. Its said "2 layer or 4 layers", i dont know exactly what it means.

    any reference of this explanation would be highly appreciate.

    Thx

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    Default Re: UE category and Maximum spatial layer support

    This means MIMO 2x2, MIMO 4x4, respectively

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    Default Re: UE category and Maximum spatial layer support

    Quote Originally Posted by RFNuttapon View Post
    Hi I cannot paste the picture, but just wonder about the column "Maximum number of supported layers for spatial multiplexing in DL" which stands for the number of mimo. Its said "2 layer or 4 layers", i dont know exactly what it means.

    any reference of this explanation would be highly appreciate.

    Thx
    It means how many "data stream" can be supported by UE.

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    Default Re: UE category and Maximum spatial layer support

    Good afternoon! Quite right

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    Default Re: UE category and Maximum spatial layer support

    Quote Originally Posted by slava121 View Post
    Good afternoon! Quite right
    Hi, I was asking about the meaning of "2 layer or 4 layers",

    Does it mean this UE Cat xx can have 2 types
    1.Can support only 2 layer
    2.Can support 4 layer (Which can definitely support 2 layer)

    ????

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    Default Re: UE category and Maximum spatial layer support

    Quote Originally Posted by RFNuttapon View Post
    Hi, I was asking about the meaning of "2 layer or 4 layers",

    Does it mean this UE Cat xx can have 2 types
    1.Can support only 2 layer
    2.Can support 4 layers (Which can definitely support 2 layers)

    ????
    UE cat 6 can support to maximum ~300 Mbps. It can get this value from (2 Carriers 20 MHz x 64 QAM x 2 layers) or (1 Carrier 20 MHz x 64 QAM x 4 layers).
    It means UE cat 6 can support 2 layers or 4 layers or both 2 layer and 4 layers.

    In reality, UE capability depends much on RF band. E.g UE cat 6 has 4 layers on band 3, but it supports only 2 layers on another band.

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    Default Re: UE category and Maximum spatial layer support

    Quote Originally Posted by linhhy View Post
    UE cat 6 can support to maximum ~300 Mbps. It can get this value from (2 Carriers 20 MHz x 64 QAM x 2 layers) or (1 Carrier 20 MHz x 64 QAM x 4 layers).
    It means UE cat 6 can support 2 layers or 4 layers or both 2 layer and 4 layers.

    In reality, UE capability depends much on RF band. E.g UE cat 6 has 4 layers on band 3, but it supports only 2 layers on another band.
    UE CAT mainly focuses on maximum bitrate. Then there are some techs to help UE get that.

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