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Proposed EUL Solutions

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Objectives This document is intended to outline the

impact of EUL Channel unlocking and

increasing the EUL interference headroom and

to provide the recommendation towards thedegraded Performances (RAN W11B)

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Simplified Flow of Impact

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WMRR: Ue Tx Power

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Conclusions

When EUL Channel is enabled, UL interference from HSUPA users increased

hence consequently Ue requires higher UL Tx Power for R99 users This is affected by the condition where RACH Preamble power increase by 2 dB to 6

dB needed to setup a call

UE TX power increases of 3-6, dB in order to keep the AMR call on the same quality

target

Higher UE TX Power degrades the UL interference situation further: Increase UE TX power in response to increase UL interference caused by HSUPA

If the UL interference caused by HSUPA users is higher than the interference

assumption in Link budget calculation, access performances at the cell edge may

degrade

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Recommendation