|-
|'''A data communication method in a wireless communication system, the method comprising: receiving, from a lower layer,'''
| [[Image:ramc1.jpg|500px]]
|-
|rowspan = "2"|'''a data unit having a sequence number; storing the received data unit in a buffer;'''
|-
|'''The method of claim 1, wherein the lower layer is a Radio Link Control (RLC) layer.'''
| [[Image:ramc1.jpg|500px]]
|-
|align = "center" bgcolor = "#B8CCE4"|'''Claim3'''
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|'''The method of claim 1, wherein the steps of determining and delivering are performed in a Packet Data Convergence Protocol (PDCP) entity.'''
| [[Image:ramc3.jpg|500px]]
|-
|align = "center" bgcolor = "#B8CCE4"|'''Claim4'''
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|'''The method of claim 1, wherein the data unit is a PDCP Service Data Unit (SDU).'''
| [[Image:ramc3.jpg|500px]]
|-
|align = "center" bgcolor = "#B8CCE4"|Claim5