Method and apparatus for handling control PDUS during re-establishing receiving sides in a wireless communications system
View Patent ↗A wireless communications system has a communications device, which has an RLC entity having a transmitting side and a receiving side. When re-establishing the receiving side, to handle control PDUs, only the receiving side in the RLC entity of the communications device is re-established, a first control PDU corresponding to the receiving side is discarded, and a second control PDU corresponding to the transmitting side is retained and not discarded.
1. A method of handling control Protocol Data Units (PDU's) in a wireless communications system having a communications device having an Radio Link Control (RLC) entity having a transmitting side and a receiving side when reestablishing the receiving side comprising:
only reestablishing the receiving side in the RLC entity of the communications device;
discarding a first control PDU corresponding to the receiving side; and
retaining and not discarding a second control PDU corresponding to the transmitting side
wherein the first control PDU corresponding to the receiving side is a Move Receiving Window (MRW) Acknowledgment (ACK) Status PDU.
2. A communications device utilized in a wireless communications system, and Radio Link Control (RLC) entity of the communications device having a transmitting side and a receiving side, utilized for accurately reestablishing the receiving side, the wireless communications device comprising:
a control circuit for realizing functions of the wireless communications device;
a central processing unit for executing a program code to operate the control circuit; and
a memory for storing the program code;
wherein the program code comprises:
only reestablishing the receiving side in the RLC entity of the communications device;
discarding a first control Protocol Data Unit (PDU) corresponding to the receiving side; and
retaining and not discarding a second control PDU corresponding to the transmitting side
wherein the first control PDU corresponding to the receiving side is a Move Receiving Window (MRW) Acknowledgment (ACK) Status PDU.
3. The method of claim 1 , wherein the first control PDU corresponding to the receiving side is an ACK/Negative Acknowledgement (NACK) Status PDU.
4. The method of claim 1 , wherein the first control PDU corresponding to the receiving side is a Change Window Size Status PDU.
5. The method of claim 1 , wherein the first control PDU corresponding to the receiving side is a RESET ACK PDU.
6. The method of claim 1 , wherein the second control PDU corresponding to the transmitting side is a Move Receiving Window (MRW) Status PDU.
7. The method of claim 1 , wherein the second control PDU corresponding to the transmitting side is a RESET PDU.
8. The method of claim 1 , wherein the wireless communications system operates in Acknowledged Mode.
9. The method of claim 1 , wherein the communications device is a mobile phone, a wireless mobile communications device, or a networking device.
10. The wireless communications device of claim 2 , wherein the first control PDU corresponding to the receiving side is an ACK/Negative Acknowledgement (NACK) Status PDU.
11. The wireless communications device of claim 2 , wherein the first control PDU corresponding to the receiving side is a Change Window Size Status PDU.
12. The wireless communications device of claim 2 , wherein the first control PDU corresponding to the receiving side is a RESET ACK PDU.
13. The wireless communications device of claim 2 , wherein the second control PDU corresponding to the transmitting side is a Move Receiving Window (MRW) Status PDU.
14. The wireless communications device of claim 2 , wherein the second control PDU corresponding to the transmitting side is a RESET PDU.
15. The wireless communications device of claim 2 , wherein the wireless communications system operates in Acknowledged Mode.
16. The wireless communications device of claim 2 , wherein the communications device is a mobile phone, a wireless mobile communications device, or a networking device.