Method and apparatus for handling downlink data upon handover in a wireless communications system
A technology of a wireless communication system and a communication device, which is applied in the field of switching operations and devices for processing uplink transmission in a wireless communication system, and can solve the problem of being unable to retransmit the number of packets, being unable to know that a packet data aggregation protocol packet has been successfully received, and resources Waste and other issues
Inactive Publication Date: 2007-12-26
INNOVATIVE SONIC
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In addition, the source eNB will not transmit the UL RLC server data unit or UL RLC related information to the destination eNB, therefore, the destination eNB cannot obtain the UL RLC Information about road control
That is to say, the destination enhanced base station cannot know that the packets corresponding to the sequence numbers 4 to 20 of the packet data aggregation protocol have been successfully received
In this case, the destination enhanced base station will output a status report unit to indicate that the packets corresponding to the packet data aggregation protocol sequence numbers 4 to 20 have been lost, so as to request the UE to retransmit the relevant packets; and at the same time, corresponding to Packets (radio link control server data units) with sequence numbers greater than 20 in the packet data aggregation protocol are still stored in the temporary register, resulting in waste of resources
In addition, since the source enhanced base station has confirmed receipt of the packets corresponding to the packet data aggregation protocol sequence numbers 4 to 20 before the handover procedure occurs, the UE may have deleted these packets
In other words, the client will not be able to retransmit the packets corresponding to the sequence numbers 4 to 20 of the packet data aggregation protocol, which will cause delays in data transmission
Method used
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[0035]Please refer to FIG. 1 , which is a functional block diagram of a wireless communication device 100 . For simplicity, FIG. 1 only shows an input device 102 , an output device 104 , a control circuit 106 , a CPU 108 , a storage device 110 , a program code 112 and a transceiver 114 of the wireless communication device 100 . In the wireless communication device 100, the control circuit 106 executes the program code 112 stored in the storage device 110 through the central processing unit 108, thereby controlling the operation of the wireless communication device 100, which can receive user input through the input device 102 (such as a keyboard). signals, or output signals such as images and sounds through the output device 104 (such as a screen, a speaker, etc.). The transceiver 114 is used for receiving or sending wireless signals, and transmitting the received signals to the control circuit 106 , or outputting the signals generated by the control circuit 106 by radio. In ...
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To handle downlink data upon handover of a user equipment from a source base station to a target base station in a wireless communications system, the source base station forwards a plurality of radio link control, hereafter RLC, service data units, hereafter SDUs, or RLC protocol data units, hereafter PDUs, that have not been positively acknowledged by the user equipment to the target base station. Then, the target base station sends the plurality of RLC SDUs or RLC PDUs to the user equipment.
Description
technical field [0001] The present invention refers to a method and related device for a wireless communication system to process switching operation of uplink transmission, especially a method and related device that can avoid unnecessary retransmission and improve transmission efficiency. Background technique [0002] The third-generation mobile communication technology can provide high spectrum utilization efficiency, unlimited coverage, high-quality, high-speed multimedia data transmission, and can meet various QoS service requirements at the same time, providing flexible and diversified Two-way transmission service, and provide better communication quality, effectively reduce communication interruption rate. However, the industry has begun to develop the next generation of mobile communication technology due to the high demand for high-speed data transmission and multimedia applications in the market, and the relevant specification committees are constantly revising the...
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IPC IPC(8): H04Q7/30H04Q7/22H04L12/56H04W28/04H04W36/02
CPCH04L2001/0092H04W36/02H04L1/187H04W80/02H04W28/04H04W36/08
Inventor 江孝祥
Owner INNOVATIVE SONIC