Method, system and device for implementing hybrid automatic request retransmission feedback mechanism

Abstract

The invention discloses a method for realizing a hybrid automatic request repeat feedback mechanism. The method comprises the following steps: a base station transmits a shared control channel (HS-SCCH) of a high-speed downlink shared channel, and a downlink scheduling control channel of high-speed downlink packet access; a terminal decodes the received HS-SCCH, and receives a data packet loaded on a high-speed physical downlink shared channel; and the terminal carries out hybrid automatic request repeat feedback on a shared information channel (HS-SICH) corresponding to the HS-SCCH and an uplink feedback channel of high-speed downlink packet access. The invention also discloses a system and base station side / terminal side equipment for realizing the hybrid automatic request repeat feedback mechanism. By adopting the method, the system and the equipment, information can be fed back on the HS-SICH.

Description

technical field [0001] The present invention relates to a hybrid automatic retransmission request (HARQ) feedback technology, in particular to a method, system and device for implementing a HARQ feedback mechanism based on a public high-speed downlink packet access radio network temporary identifier (H-RNTI). Background technique [0002] In order to meet the increasing demands of users for high-speed packet data access services, 3GPP Rel5 introduces High-Speed ​​Downlink Packet Access (HSDPA) technology. Among them, adaptive modulation and coding (AMC) or HARQ technology is used to realize high-order modulation; and a media access control layer HSDPA (MAC-hs) entity is added at the base station side to realize fast data scheduling. Using the key technologies of HSDPA, such as AMC / HARQ and MAC-hs, not only can obtain higher user peak rate and cell data throughput rate, but also reduce data transmission delay. [0003] After the introduction of HSDPA technology, the correspo...

AI Technical Summary

Problems solved by technology

When the base station scheduler uses the public H-RNTI identifier for addressing, it generally adopts the HARQ mechanism without feedback. That is to say, when the UE receives the public H-RNTI, it cannot feed back information on the HS-SICH

Here, the base station scheduler can only send data to a specific UE by using the dedicated H-RNTI, so UEs can be distinguished only by using the dedicated H-RNTI; and the base station scheduler uses the public H-RNTI to represent a UE group, which can be given to If multiple UEs send data, it is impossible to distinguish each UE only by using the common H-RNTI. A certain UE needs to judge whether the data is sent to itself according to the high-level terminal identification information in the received data packet, and distinguish it in this way. Each UE

[0013] To sum up, since HS-SICH is a channel for feedback information, if there is no information feedback, the channel will be idle, resulting in waste of channel resources

In addition, the use of the non-feedback HARQ mechanism in the existing technology will inevitably lead to waste of channel resources / reduction of system throughput

Moreover, for HSDPA systems of various enhanced levels using time division duplex mode, in time division duplex mode, there is a one-to-one correspondence between the scheduling control channel HS-SCCH and the feedback channel HS-SICH. The scheduling control information is sent through the HS-SCCH. Correspondingly, if the non-feedback HARQ mechanism is adopted, the channel resources of the HS-SICH corresponding to the H-SCCH will be wasted.

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