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A PUSCH retransmission indication method

A retransmission indication and indication technology, which is applied in the direction of error prevention/detection using the return channel, can solve problems such as PHICH occupation and physical resource collision, and achieve the effect of avoiding PHICH resource collision

Inactive Publication Date: 2013-10-23
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the PUSCH of the main cell, the UE sends the PUSCH in the uplink subframe 321, and then the base station sends the PHICH or UL Grant in the downlink subframe 322, triggering the UE to retransmit the PUSCH for the uplink subframe 321 in the uplink subframe 323, when When the base station transmits the PHICH in the downlink subframe 304, it may occupy the same physical resource as the PHICH corresponding to the PUSCH in the adjusted Cell 303, and a physical resource collision occurs.

Method used

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  • A PUSCH retransmission indication method
  • A PUSCH retransmission indication method
  • A PUSCH retransmission indication method

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Embodiment approach

[0062] ① Regarding the timing relationship of PUSCH, if either the calling Cell or the called Cell has an uplink and downlink configuration of 0 or 6, and the calling Cell and the called Cell have different uplink and downlink configurations, the cross-carrier scheduling of the called Cell’s retransmission PUSCH , the corresponding PHICH is ignored, and the UL Grant is used to trigger retransmission if necessary.

[0063] ② Regarding the timing relationship of PUSCH, if the PUSCH loopback time of the uplink and downlink configurations of the calling Cell and the adjusted Cell are different, for the retransmission PUSCH of the adjusted Cell with cross-carrier scheduling, the corresponding PHICH is ignored. If retransmission is required, use UL Grant triggered.

[0064] (2) Implementation Method 2

[0065]For the PUSCH transmitted by the adjusted Cell for the first time, the terminal detects the PHICH channel, the enhanced PHICH channel or the UL Grant to obtain the indication ...

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Abstract

The invention provides a PUSCH retransmission indication method. The method is used in cases in which multiple Cells in CA use different TDD uplink and downlink configuration and cross-carrier scheduling is executed among the Cells. The method is that in the case of a retransmitted PUSCH of a SCell in the cross-carrier scheduling, a terminal receives UL Grant from the PDCCH of a PCell or receives HARQ-ACK feedback information from the PHICK or the enhanced PHICH of the PCell, and that according to the received UL Grant of the HARQ-ACK feedback information, data is transmitted on the PUSCH of the SCell. The PUSCH retransmission indication method is capable of eliminating a problem of PHICH resource collision after multiple PUSCH retransmissions.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a PUSCH retransmission indication method. Background technique [0002] Long Term Evolution (LTE, Long Term Evolution) technology supports Frequency Division Duplexing (FDD, Frequency Division Duplexing) and TDD duplexing modes. figure 1 It is a schematic diagram of the frame structure of the TDD system of LTE. The length of each wireless frame is 10 milliseconds (ms), which is divided into two half-frames with a length of 5ms. Each half-frame contains 8 time slots with a length of 0.5ms and 3 special fields with a length of 1ms. The two special domains are downlink pilot time slot (DwPTS, Downlink pilot time slot), guard interval (GP, Guard period) and uplink pilot time slot (UpPTS, Uplink pilot time slot), each subframe consists of two consecutive Time slot composition. [0003] The transmission in the TDD system includes: transmission from the base station to...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/16
Inventor 赵铮李迎阳
Owner BEIJING SAMSUNG TELECOM R&D CENT
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