How to reduce HSDPA Inactive TTI ?

[fahmi]

Dear Huawei experts,

In our network 13% of Total number of TTIs within which there is data to transmit in HSDPA queue buffers are inactive TTIs. Which means 13% of time with queued data but no transmission.

The main reason for inative TTI are invalid CQI (60%)

How to reduce inactive TTI ? => direct impact on HSDPA THPT

Incative tti.jpg

[coach]

Hi, this occurs when uplink coverage is poor and a valid CQI cannot be obtained by the NodeB.

Do the worst offenders (highest VS.HSDPA.NotSchedule.InvalidCQI) have RTWP issues?

[fahmi]

No, RTWP is Ok for almost all cells

Hi, this occurs when uplink coverage is poor and a valid CQI cannot be obtained by the NodeB.

Do the worst offenders (highest VS.HSDPA.NotSchedule.InvalidCQI) have RTWP issues?

[Muhammad Imran Rafique]

Good observation, any other NW can confirm same?

invalid CQI shouldn't be any issue as it surely been added in scheduler algo.