How many RLC instances? What does PDCP do?
Jul 262009

RLC provides 3 different mode:

1. transparent

2. unacknowledged

3. acknowledged mode

Each mode provides a different set of services to the higher layers.

Some of them are

1. segmentation and reassembly

2. concatenation

3. reliable transfering data

4. flow control

5. in-sequence delivery

6. Error correction by ARQ(automatic repeat request)

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