Method for QoS guarantees in a multilayer structure
A method in which a user equipment processes data in a wireless mobile communication system is provided. The method includes the steps of receiving a first data block from an upper layer, transferring a second data block including the first data block to a lower layer at a particular protocol layer, discarding the first and second data blocks present in the particular protocol layer if a certain period of time has passed, and transferring information associated with the discard of the second data block to the lower layer.
1. A method of processing data at a transmitting end in a wireless mobile communication system, the method comprising the steps of:
receiving at a Packet Data Convergence Protocol (PDCP) layer a first data block from an upper layer;
generating a second data block including the first data block at the PDCP layer;
discarding the second data block present in the PDCP layer if a certain period of time has passed; and
transferring information associated with the discard of the second data block from the PDCP layer to a Radio Link Control (RLC) layer if the second data block has already been transferred from the PDCP layer to the RLC layer,
wherein the information associated with the discard indicates that the second data block has been discarded at the PDCP layer or instructs the RLC layer to discard the second data block.
2. The method of claim 1 , wherein the second data block present in the PDCP layer is discarded if a timer expires, wherein the timer is operated when receiving the first data block from the upper layer.
3. The method of claim 1 , wherein the first data block is a PDCP Service Data Unit (PDCP SDU).
4. The method of claim 1 , wherein the second data block is a PDCP Protocol Data Unit (PDCP PDU).
5. The method of claim 1 , wherein the upper layer is a Radio Resource Control (RRC) layer.
6. The method of claim 1 , wherein the RLC layer operates in an Acknowledged Mode (AM) or an Unacknowledged Mode (UM).
7. The method of claim 1 , wherein the certain period of time is indicated by a network.
8. The method of claim 1 , wherein the certain period of time is indicated by an upper layer above the PDCP layer.
9. The method of claim 2 , wherein a value of the timer is indicated by a network.
10. The method of claim 2 , wherein a value of the timer is indicated by an upper layer above the PDCP layer.
11. An apparatus for use in a wireless mobile communication system, the apparatus comprising:
an upper entity;
a Packet Date Convergence Protocol (PDCP) entity below the upper entity; and
Radio Link Control (RLC) entity below the PDCP entity,
wherein the PDCP entity is configured:
to receive a first data block from the upper entity;
to generate a second data block including the first data block at the PDCP entity;
to discard the second data block present in the PDCP entity if a certain period of time has passed; and
to transfer information associated with the discard of the second data block to an RLC entity if the second data block has already been transferred from the PDCP entity to the RLC entity,
wherein the information associated with the discard indicates that the second data block has been discarded at the PDCP entity or instructs the RLC entity to discard the second data block.
12. The apparatus of claim 11 , wherein the second data block present in the PDCP entity is discarded if a timer expires, wherein the timer is operated when receiving the first data block from the upper entity.
13. The apparatus of claim 11 , wherein the first data block is a PDCP Service Data Unit (PDCP SDU).
14. The apparatus of claim 11 , wherein the second data block is a PDCP Protocol Data Unit (PDCP PDU).
15. The apparatus of claim 11 , wherein the upper entity is a Radio Resource Control (RRC) entity.
16. The apparatus of claim 11 , wherein the RLC entity operates in an Acknowledged Mode (AM) or an Unacknowledged Mode (UM).
17. The apparatus of claim 11 , wherein the certain period of time is indicated by a network.
18. The apparatus of claim 11 , wherein the certain period of time is indicated by an upper entity above the PDCP entity.
19. The apparatus of claim 12 , wherein a value of the timer is indicated by a network.
20. The apparatus of claim 12 , wherein a value of the timer is indicated by an upper entityabove the PDCP entity.