- This topic has 27 replies, 1 voice, and was last updated 8 years, 1 month ago by
.
-
Posts
-
Can any help me why there are some time RLCthroughput is higher than LLC throughput .
I-Hi,
In the RLC throughput, are you taking into account the retransmissions or only the useful data ?
Could you share what kind of values you see ?
The values are for example throughput on RLC is 56kbit/s and LLC is 52kbit/s but some times for instance is viseversa LLC throughput is higher than RLC and indicator for throughput been checked it is really for me not clear to say it count retransmission but any way what is the real throughput in order to make EDGE dimensioning if it is possible give me a help
Hi Eric,
For EDGE dimensionig, you should actually start from the Downlink RLC throughput required by users, on Air interface + the amount of EDGE users. That is your initial assumption. For example, as a EDGE user, I would want to get at least 130kb/s most of the time.
And in average, you can assume there are 1.5 users at the same time in one cell. So you need : 6 or 7 PDCH with a throughput in MCS9, etc etcFrom this, you will deduce:
1/ number of required TS & TRX
2/ capacity required on Abis
3/ capacity required in PCU (MFS in ALU)
4/ capacity required in Ater PS & Gb interfacehi pix/eric
need a refresh
could you guys help me with diffrence b/w RLC throughput and LLC throughput.
Hi,
LLC is a big frame (max 1500 bytes)
RLC is a small block that contains just one segment of a LLC frame.
Each time one LLC frame goes through the PCU, it is segmented into smaller RLC blocks.Differences between both throughputs come from the RLC headers and RLC retransmissions (if they are included)
pix
hey pix
am i reading the model correct:
1.IP
2.Transport
3.N/w layer
4.DLL
a. LLC
b. RLC
c. MAC
5.Physicalis the order correct ?
rgrds
…the order is not correct.
layer 1 is physical, etcwhere does your ip layer come from ?
can anybody like to share some sort of notes on EDGE/GPRS dimensioning wiht me
What about SNDCP, what’s the difference between SNDCP and RLC/LLC?
Subnetwork Dependent Convergence Protocol:-
.Multiplexer/demultiplexer for different network layer entities onto LLC layer
.Compression of protocol control information (e.g. TCP/IP header)
.Compression of data content (if used)
.Segmentation/de-segmentation of data to/from LLC layerLogical Link Control (LLC) Layer:-
.Reliable logical connection between SGSN and MS
.Independent of underlying radio interface protocolswhat is RLC? abbrevation of RLC, Definition and full detail of RLC??? Plz any one help me.
Difference between LLC/RLC/TBF/PDCH throughput????
you should re-read the whole topic, all the answers are there.
Based on the trend of the discussion, does it mean that the RLC Throughput reflects more of the user experience compared to LLC Throughput?
- The forum ‘Telecom Design’ is closed to new topics and replies.
