Method for detecting data-bag lost and apparatus thereof

Abstract

The invention discloses a data packet loss detection method, comprising: a receiving end receives a protocol data unit with a serial number, and updates the serial number of the protocol data unit to be received; judging whether the received protocol data unit is service data If it is the last protocol data unit in the unit, then close the data packet detection timer, and this process ends, otherwise, restart the data packet detection timer, and when the data packet detection timer expires, the receiving end sends the data packet to be received to the sending end A request for retransmission of a protocol data unit. The invention also discloses a device for detecting data packet loss. According to the present invention, the loss detection of the data packet can be realized without changing the structure of the RLC PDU. The data packet detection method of the present invention does not affect the compatibility of UEs that do not support this function.

Description

technical field [0001] The invention relates to a communication technology, in particular to a detection method and detection device for data packet loss. Background technique [0002] There is a 12-bit SequenceNumber (sequence) field in the RLC PDU (Radio Link Protocol Data Unit) in the acknowledged mode. When the sender generates a PDU (protocol data unit), it gives a serial number to each PDU and adds it to the Sequence Number field, and sends the data in the order of increasing serial numbers when the data is initially sent. When the receiving end receives the PDU, it detects the serial numbers of each PDU. When the serial numbers are discontinuous, the receiving end thinks that the PDU corresponding to the missing serial number is lost, and sends a STATUS PDU (status protocol data unit) message to the sending end, requesting The sender retransmits the PDU corresponding to the missing sequence number. [0003] Such as figure 1 As shown, at the sending end of the RLC e...

AI Technical Summary

Problems solved by technology

[0009] However, the solution proposed by NEC needs to modify the structure of RLC PDU. The network needs to process each UE separately according to whether the UE (user terminal) supports this capability. Therefore, the UE needs to report this capability, which will lead to relatively large changes to the entire protocol.

If the network side does not handle them separately according to UE capabilities, it will cause compatibility problems for UEs without this function

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