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What is the difference between NOTCAMPED and IDLE state in LTE

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What is the difference between NOTCAMPED and IDLE state in LTE
posted Feb 9, 2016 by Ashish Tad

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IDLE state at MME corresponds to ECM-IDLE but not sure about NOTCAMPED state. Can you please share the link where you found this "NOTCAMPED" word ?
Found this NOTCAMPED state in a 3gpp spec. and this state is related to UE not to MME.

1 Answer

+1 vote

In IDLE mode UE can read system info, Paging info from the eNB. In IDLE mode UE is rrc idle and ECM IDLE.

When UE is notcamped then UE is not reachable from networks. UE can not read Paging. UE can be in no coverage .

answer Feb 9, 2016 by Veer Pal Singh Yadav
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+1 vote

If UE is put in IDLE state and can save battery then why we need DRX for the same..

+2 votes

During my study about the measurement and ANR, I have the question. Please help to let me get the proper answer.
[ Condition]
1. UE is in the connected state.
2. UE measures one PCI and reports it to eNB but it does not belong to NRT(Neighbor Relation Table) in eNB.
3. eNB sends rrcConnectionReconfigurationMessage to read CGI for that PCI.
4. UE should read MIB/SIB1 to report CGI info to eNB.

In Step 4), In some materials on the web, UE should use IDLE periods to get SIB1, which is configured as DRX config in rrcConectionReconfigurationMesage. Because Measurement Gap is too short to read MIB/SIB1 and it's only for the measurement purpose.

[Question]
When UE is in the Connected State, How UE could use DRX configuration which is intended to use in IDLE state?

As my basic understanding, DRX configuration is to improve the battery life in idle mode.

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