Method and apparatus for operating a timer for processing data blocks
A timer for processing data blocks is proposed for a receiver of a mobile communications system. If the timer is not running, the timer is started based a data block. The data block has a sequence number higher than a sequence number of another data block that was first expected to be received. If the timer is stopped or expires, the timer is based on a highest sequence number of a data block among data blocks that cannot be delivered to a higher entity. The timer can be used to prevent a stall condition in mobile communications.
1. A method of operating a timer for processing data blocks in a receiver of a mobile communications system, the method comprising:
based on the timer not running, starting, by the receiver, the timer based on a sequence number of a data block being higher than a sequence number of another data block that was first expected to be received;
based on the timer expiring, re-starting, by the receiver, the timer based on a highest sequence number of a data block among data blocks that cannot be delivered to a higher entity; and
based on the re-started timer expiring, delivering, by the receiver, to the higher entity, correctly received data blocks up to a next not received data block.
2. The method of claim 1 , wherein the next not received data block is a data block that is not received in the receiver and immediately follows the correctly received data blocks.
3. The method of claim 1 , wherein sequence numbers of the correctly received data blocks sequentially follow a sequence number for which the timer was re-started.
4. The method of claim 1 , wherein the data blocks are stored in a buffer and processed by a data link layer of the receiver.
5. The method of claim 1 , wherein the data blocks are stored in a buffer and processed by a Medium Access Control (MAC) layer of the receiver.
6. The method of claim 1 , wherein no additional timer is started in the receiver during the timer is running.
7. A receiver in a mobile communications system, the receiver comprising:
a buffer configured to store data blocks; and
a processor coupled to the buffer and configured to:
based on the timer not running, start a timer based on a sequence number of a data block being higher than a sequence number of another data block that was first expected to be received;
based on the timer expiring, re-start the timer based on a highest sequence number of a data block among data blocks that cannot be delivered to a higher entity; and
based on the re-started timer expiring, deliver, to the higher entity, correctly received data blocks up to a next not received data block.
8. The receiver of claim 7 , wherein the next not received data block is a data block that is not received in the receiver and immediately follows the correctly received data blocks.
9. The receiver of claim 7 , wherein sequence numbers of the correctly received data blocks sequentially follow a sequence number for which the timer was re-started.
10. The receiver of claim 7 , wherein the data blocks are processed by a data link layer of the receiver.
11. The receiver of claim 7 , wherein the data blocks are processed by a Medium Access Control (MAC) layer of the receiver.
12. The receiver of claim 7 , wherein no additional timer is started in the receiver during the timer is running.