RRC Idle on network

[ahmed_]

Hi All,

I have question regarding RCC state once connected to the network.

Based on the logs, sometimes RRC has changes the state from connected to idle, and after a while its changing again to connected.

and when RRC:idle, the download process will pending untul RRC:connected again.

In my understanding, RRC is something that we cannot control and its coming from network. RRC will set to connected once there is transaction on going.

After some times, its will back to idle when no data transaction on going. I think not possible to control RRC, but in my design I have a plan to keep RRC connected.

Since I dont have concern on low power mode. or I have mechanism, back to connected state once device got RRC:idle.

The things that I plan to do is to implement PSM and monitoring the active time to keep negotiate with network. 

So, I have several questions.

• Is my understanding correct?
• Do you know, whats actually happen once RRC on idle state?
• what kinds of factor that makes RRC changes the state from connected to idle?
• Is my plan feasible to keep RRC connected?

Thanks all.

[Hakon]

Hello,

Is my understanding correct?

Yes, for the most part.

Do you know, whats actually happen once RRC on idle state?

It is just to let the device know that no data transfer happening so the device can save power.

what kinds of factor that makes RRC changes the state from connected to idle?

If data is not being sent before the RRC inactivity timer expires, then RRC mode is set to idle, which means the device is no longer connected to the base station. The transition to RRC idle can happen faster by using release assistance indication(RAI).

Is my plan feasible to keep RRC connected?

I'm not sure what your plan is, so I can't answer.