Hybrid automatic forward request entity and its data block submission method

Abstract

The related data block report method for HARQ entity comprises: if the reordered buffer on HARQ receive end advanced receives the first data block with latter number, it starts the timer; before timer overtime, if all data blocks before the first one are determined missing or receiving rightly, it reorders the data block except the missing and reports to the super layer. This invention reduces reordering time to fast trigger re-transmission of ARQ.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a Hybrid Automatic Repeat Request (HARQ for short) technology. Background technique [0002] Wideband Code Division Multiple Access (WCDMA for short) is one of the three major third generation mobile communication (The Third Generation, "3G" for short) systems in the world at present. The WCDMA system consists of three parts, namely Core Network (Core Net, referred to as "CN"), Universal Mobile Telecommunications System Terrestrial Radio Access Network (UMTS Terrestrial RadioAccess Network, referred to as "UTRAN") and User Equipment (User Equipment, referred to as "UE"). ")composition. [0003] The earliest protocol version of WCDMA is Release 99 (R99). In this version, the bearer of uplink and downlink services is based on dedicated channels, and the maximum data transmission rate that can be achieved is 384Kbps. With the increase of users' requirements for data tra...

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Problems solved by technology

[0007] In practical application, the above scheme has the following problems: there is still unnecessary time delay in the existing data transmission method

[0008] The main reason for this situation is that when the MAC layer of the receiving end performs HARQ rearrangement on the received data blocks in the prior art, if it is found that the data block with the sequence number before it is not received correctly, the Subsequent data blocks are put into the rearrangement cache to wait and start the timer until the original missing data block is correctly received or the timer expires before the data block in the rearrangement buffer is transmitted to the RLC layer. Therefore, in HARQ reordering When there is a missing alarm during transmission, that is, when the sending end does not receive the NACK message from the receiving end, or misjudges the received NACK message as ACK, and does not retransmit the data block, the receiving end will continue to wait. Until the timer expires, the data blocks in the rearrangement buffer are not transmitted to the RLC layer, which brings unnecessary waiting delay to data transmission

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