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View Full Version : HS-DSCH/E-DCH Channel



rumy
2013-10-24, 06:45 PM
Hello firends,

Could someone explain why HS-DSCH/E-DCH transport channel is associated with HSDPA (eg. When the UE-specific packet scheduler attempts to allocate an HS-DSCH/E-DCH transport channel for the NRT RAB, used at HSDPA Atts for user perspective).

My issue is I always have associated HS-DSCH with HSDPA and E-DCH with HSUPA.

BR

incoincov
2013-10-24, 08:48 PM
Hi,
the transport channels are used to transfer data b/w MAC and Phisical Layer.They define how the info is transferred and are categorized as Common (BCH, PCH, RACH, FACH, HS-DSCH) and Dedicated (DCH, E-DCH).All transport channels have associated TF and TFS.
HS-DSCH is used only in DL for HSDPA.Up to rel. 6 of 3GPP specs the use of HS-DSCH is limited to UE in CELL_DCH. Rel. 7 introduces the posibility to use HS-DSCH in CELL_FACH.There's a single HS-DSCH within each cell that supports HSDPA (e.g. HS-DSCH is time shared b/w all active HSDPA connections)HS-DSCH is always mapped to HS-PDSCH and can be used to transfer both cntl plane signalling and user plane data. If HS-DSCH is used only for user data then DCH may be used in parallel to transfer cntl signalling.
E-DCH transport channel is used for HSUPA when UE is in CELL_DCH. Each cell with active HSUPA connection has a single E-DCH channel.This channel is alwayd mapped to one or more E-DPDCH. E-DCH can be used for bothe user plane and cntl signalling data. Ther MAC-e/es layer within UE is able to multiplex both DTCH and DCCH log channel onto single E_DCH. If E-DCH is only used for user data DCH can be use dor cntl plane signalling.

If HSDPA/HSUPA UE is in 3-way soft HO.



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




If UE is configured with both HSDPA and HSUPA connections HSDPA data is transferred from the HS-DSCH serving cell.Let's assume that HS-DSCH serv cell is the same as E-DCH serv cell. The support for SHO means that the responsiveness of the serv cell change prosedure is less critical for HSUPA. The performance of an HSDPA connection relies on the serv cell is alwayd the best cell.HSUPA serv cell chenge can use the same triggering mechanism as HSDPA serv cell change e.g. DL CPICH Ec/Io. the approach allows the 2 serv cell responsibilities to move together and removes the reqirement for separate triggering mechanisms and additional signalling.

rumy
2013-10-24, 09:19 PM
Thank you for your answer!
I really appreciate your explanation; I am thinking why, for each HSDPA Attempt, the packet scheduler attempts to allocate an HS-DSCH/E-DCH transport channel for the NRT RAB and NOT AN HS-DSCH/DCH?

Thanks!

electron
2013-10-24, 09:41 PM
The reason is based on 3GPP always UL Throughput should be around 10% or DL throughput to keep user perception satisfactory also as for HSDPA user need to send UL request faster to nodeB to keep network response to user request and consequently keep better user perception always E-DCH will be used with HS-DSCH. By the way there is optional RAB (UeRc) that with combination(16K/HSDA) !!


Cheers
Thank you for your answer!
I really appreciate your explanation; I am thinking why, for each HSDPA Attempt, the packet scheduler attempts to allocate an HS-DSCH/E-DCH transport channel for the NRT RAB and NOT AN HS-DSCH/DCH?

Thanks!

oswe
2013-10-25, 07:27 AM
well, i can tell you for example in NSN if you have a configured cell with HSDpa, then every time you activate HSDPA, the EDCH channel will be activated also at the same time for your connection.