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 particular protocol layer a first data block from an upper layer;
generating a second data block including the first data block at the particular protocol layer;
discarding the second data block 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 from the particular protocol layer to a lower layer if the second data block has already been transferred from the particular protocol layer to the lower layer,
wherein the information associated with the discard serves to indicate the discard of the second data block or to instruct the lower layer to discard the second data block.
2. The method of claim 1 , wherein the second data block present in the particular protocol 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 particular protocol layer is a Packet Data Convergence Protocol (PDCP) layer.
4. The method of claim 1 , wherein the certain period of time is indicated by a network.
5. The method of claim 1 , wherein the certain period of time is indicated by an upper layer above the particular protocol layer.
6. The method of claim 2 , wherein a value of the timer is indicated by a network.
7. The method of claim 2 , wherein a value of the timer is indicated by an upper layer above the particular protocol layer.
8. The method of claim 3 , wherein the first data block is a PDCP Service Data Unit (PDCP SDU).
9. The method of claim 3 , wherein the second data block is a PDCP Protocol Data Unit (PDCP PDU).
10. The method of claim 3 , wherein the upper layer is a Radio Resource Control (RRC) layer.
11. The method of claim 3 , wherein the lower layer is a Radio Link Control (RLC) layer.
12. The method of claim 11 , wherein the RLC layer operates in an Acknowledged Mode (AM) or an Unacknowledged Mode (UM).
13. An apparatus for use in a wireless mobile communication system, the apparatus comprising:
an upper layer entity;
a particular protocol layer entity placed below the upper layer entity; and
a lower layer entity placed below the particular protocol layer entity,
wherein the particular protocol entity is configured:
to receive a first data block from the upper layer;
to generate a second data block including the first data block at the particular protocol layer;
to discard the second data block present in the particular protocol layer if a certain period of time has passed; and
to transfer information associated with the discard of the second data block to a lower layer if the second data block has already been transferred from the particular protocol layer to the lower layer,
wherein the information associated with the discard serves to indicate the discard of the second data block or to instruct the lower layer to discard the second data block.
14. The apparatus of claim 13 , wherein the second data block present in the particular protocol layer is discarded if a timer expires, wherein the timer is operated when receiving the first data block from the upper layer.
15. The apparatus of claim 13 , wherein the particular protocol layer is a Packet Data Convergence Protocol (PDCP) layer.
16. The apparatus of claim 13 , wherein the certain period of time is indicated by a network.
17. The apparatus of claim 13 , wherein the certain period of time is indicated by an upper layer above the particular protocol layer.
18. The apparatus of claim 14 , wherein a value of the timer is indicated by a network.
19. The apparatus of claim 14 , wherein a value of the timer is indicated by an upper layer above the particular protocol layer.
20. The apparatus of claim 15 , wherein the first data block is a PDCP Service Data Unit (PDCP SDU).
21. The apparatus of claim 15 , wherein the second data block is a PDCP Protocol Data Unit (PDCP PDU).
22. The apparatus of claim 15 , wherein the upper layer is a Radio Resource Control (RRC) layer.
23. The apparatus of claim 15 , wherein the lower layer is a Radio Link Control (RLC) layer.
24. The apparatus of claim 23 , wherein the RLC layer operates in an Acknowledged Mode (AM) or an Unacknowledged Mode (UM).