Automatic retransmission method, transmitter and receiver for use in LTE technology

Abstract

The invention discloses an automatic retransmitting method in LTE (long-term evolution) technique, applied between base staion NodeB and terminal UE, where NodeB and UE respectively act as transmitting and receiving ends or receiving and transmitting ends and the method comprises: the transmitting end receives data from upper layer and sends the data to the preset retransmit buffer memory and the receiving end; the receiving end receives the data and returns data receiving status information to the transmitting end; the transmitting end receives the data receiving status information and then determines whether to need to retransmit the data: if yes, retransmitting the corresponding data in the buffer memory. And the invention discloses two transmitters and two receivers. And it largely reduce data retransmitting delay at RLC layer in the original protocol and reduces burden on the upper layer devices of NodeB and increases their processing speeds.

Description

technical field [0001] The present invention relates to the technical field of wireless communication system service transmission, in particular to an automatic retransmission method in Long Term Evolution (LTE) technology, two kinds of sending devices and two kinds of receiving devices. Background technique [0002] The LTE technology includes High Speed ​​Downlink Data Packet Access (HSDPA) technology and High Speed ​​Uplink Data Packet Access (HSUPA) technology. In the two technologies of HSDPA and HSUPA, through the fast hybrid automatic retransmission (HARQ) technology of the physical layer, when an error occurs in data transmission, the sender uses the automatic retransmission mechanism of the physical layer to retry the error or lost data. transmission, thereby reducing the chance of high-level retransmission. In addition, since the entity responsible for HARQ technology on the side of the Global System for Mobile Communications Terrestrial Radio Access Network (UTRA...

AI Technical Summary

Problems solved by technology

[0009] From the description of the RLC layer retransmission in the above prior art, it can be seen that the existing RLC layer retransmission is performed between the RNC and the UE, and the retransmission process not only needs to be processed by the RNC, but also needs to be processed by the NodeB process, and involves data transmission between RNC and NodeB, resulting in a large delay in retransmission at the RLC layer

[0010] In addition, since the retransmission buffer is set in the RNC, since the number of UEs each RNC is responsible for is very large, the amount of retransmission buffer required is also very large, especially when carrying high-speed data traffic, it is easy to cause the buffer resources of the RNC to Tension increases the burden on the RNC and reduces the throughput of the RNC

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