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Thread: What is a CE (Channel Element) in WCDMA?

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    What is a CE (Channel Element) in WCDMA?

    What is a CE (Channel Element) in WCDMA?
    Any one can give description on CE?
    How many CE used for different type of services in WCDMA?



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    Re: What is a CE (Channel Element)?

    Clear Definition is
    "A band Channel Element is the resource base required in the Node-B to Provide for one voice channel capacity, including the control plane to Provide for one voice channel capacity, including the control plane signaling, compressed mode, the transmit diversity and softer handover. "signaling, compressed mode, the transmit diversity and softer handover."

    Factors affecting capacity in WCDMA UL and DL, sorted by descending level of importance as follows: Factors affecting Capacity in WCDMA UL and DL, sorted by descending level of Importance as Follows:
    - UL: No. CE support on each Node B, interference, Node B sensivity, .. - UL: No. CE support on the each Node B, interference, Node B sensivity, ..
    - DL: No. CE support on each Node B Iub interface capacity, power DL, OVSF, ... - DL: No. CE support on the each Node B Iub interface capacity, power DL, OVSF, ...

    Thus, CE can be viewed as a license for each NodeB capacity (not more). Thus, CE can be viewed as a license for each vertex NodeB capacity (not more).
    Each service will need some different CE UL and DL, such as: the each service will need some Different CE UL and DL, such as:
    AMR 12.2 k: Uplink 1; downlink AMR 12.2 k 1: Uplink 1; downlink 1
    CS / PS 64 K: 3 Uplink, downlink 2 CS / PS 64 K: 3 Uplink, downlink 2
    PS 128/144k: Uplink 5; downlink 128/144k PS 4: Uplink 5; DL 4
    384 k PS: Uplink 10, downlink 8384 k PS: Uplink 10; downlink 8

    Last edited by gsm; 03-24-2014 at 12:50 PM.
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    Re: What is a CE (Channel Element) in WCDMA?

    hello
    is there an NSN document or presentation which explains the CEs used in terms of Release (i.e RU10/20/30) and the various baseband units associated with it?

    I would be very grateful if you could share this please if its not confidential.

    thanks


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    Quote Originally Posted by anant_iyer124 View Post
    hello
    is there an NSN document or presentation which explains the CEs used in terms of Release (i.e RU10/20/30) and the various baseband units associated with it?

    I would be very grateful if you could share this please if its not confidential.

    thanks
    CE is a basic unit that measures the channel demodulation capabilities of a NodeB. CEs are classified into uplink (UL) CEs and downlink (DL) CEs.
    One UL CE needs to be consumed by a UL 12.2 kbit/s voice service (SF = 64) plus 3.4 kbit/s signaling.
    One DL CE needs to be consumed by a DL 12.2 kbit/s voice service (SF = 128) plus 3.4 kbit/s signaling


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    CE consumption per DCH for NSN

    DCH data rate / kbps

    Used CE

    AMR 1 <=16 1

    32 2

    64 4

    128 4

    256 8

    384 16

    RU10/RU20/RU30 have same CE consumption per service. Major difference is that in RU30 and RU40, CE association is on a block basis in order to make more efficient association. In RU10/RU20 max number of CEs per board is 612 and in RU30 is 936 if I am not wrong. Max 2 boards per NodeB.


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