Hi All.
Where / in which msg to check RLC buffer occupancy threshold for scc activation/deactivation?
I think it is MAC buffer not rlc buffer.
Actually one tc is present scell activation/deactivation by rlc Bo threshold
I got this info:
A device for activating an SCC in carrier aggregation, including:
[0000]
[0052] a processor configured to execute a computer program with the following functions: monitoring a cache data volume reported each time by RLC, and when the cache data volume reaches an activation data volume threshold, increasing a count value of an SCC activating counter; and when a monitoring requirement is met and a ratio of the count value of the SCC activating counter and a value of reported times of the RLC reaches a preset activating threshold, activating the SCC; and
[0053] a storage device configured to store the code of said computer program.
[0054] A device for deactivating an SCC in carrier aggregation, including:
[0000]
[0055] a deactivation monitoring component configured to monitor a cache data volume reported each time by RLC, and when the cache data volume is below a deactivation data volume threshold, to increase a count value of an SCC deactivating counter; and
[0056] a deactivation component configured to deactivate the SCC when a monitoring requirement is met and a ratio of the count value of the SCC deactivating counter and a value of reported times of the RLC reaches a preset deactivating threshold.
But did not get properly which message or steps would be present here.
Do you know at least what is the RLC buffer size?
I think it is 1Mb on most UEs.
I mean new UEs.
You can find it in UE capabilities the RLC buffer size.
May I ask why you want to know this?
It is probably 40% for activation of SCC and 5% for deactivation of SCC ,or some similar valuer, for a specific amount of time of course.
Ok thanks, at the time of scc activation also some rlc buffer realted msg need to be checked.
Operator/dell vendor wants tc like this on this scenario.
Activation/deactivation of scc is done by MAC CE.
.
Controlled by eNodeB if I am not wrong.
Hi, let’s dig more into this activation / deactivation done by MAC CE.
These MAC CE’s are sent to UE mapped inside DL-SCH and then PDSCH channel.
If yes, then DCI might be sent to UE.
If yes, then which format DCI used?
Scell activation is done by rlc bo threshold only.
It must be comfigured in eNB.
Yes, scell configuration is done by RRC reconfig but activation deactivation is done by MAC CE.
Yes MAC CE will indicate UE to start monitoring Scell PDCCH.
But Scell activation and BO distribution decision is always taken by RLC.
Do you mean carrier indicator filed 0,3 representing ?
In DCI=1
0,3 representing bits
To which carrier DCI is referring to
This is for 5G from there I took the picture (from sharetechnote).
I was concerned that how MAC CE for Act/Dec is sent to UE?
Sent on pdsch.
Can you elaborate more on this?
What exactly this mean?
Yes. MAC control elements are part of DL-SCH transport channel and same is mapped to PDSCH.
Refer to 38.321 for more details.
This much i was aware, the only concern was having wrt DCI, as which DCI will be used for sending this since enb is sending only MAC CE either 1 octet / 4 octet. No user data.
Earlier I was having doubt for DCI-1C but we can not map 1C with C-RNTI.
If 3 bits for example 101 it means DCI is referring to carrier number 5.
This is for cross-carrier scheduling.