Method and equipment for processing uplink transmission

A technology of uplink, downlink and uplink subframes, which is applied in the field of uplink transmission in the LTE system, can solve problems such as waste of resources, and achieve the effect of ensuring effectiveness, ensuring transmission performance, and improving performance

Inactive Publication Date: 2014-12-31
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the uplink reference uplink and downlink configuration adopted is uplink and downlink configuration 0, the uplink index (UL index) is sent in the UL Grant without UL DAI, which causes the UE to only feed back HARQ-ACK according to the maximum binding window, resulting in resource waste

Method used

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  • Method and equipment for processing uplink transmission
  • Method and equipment for processing uplink transmission
  • Method and equipment for processing uplink transmission

Examples

Experimental program
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Effect test

Embodiment 1

[0049] In a TDD system where the uplink and downlink configurations can change rapidly, the interference level received by each uplink subframe may be different. For example, flexible subframes may be interfered by downlink transmissions of neighboring cells, and the interference level is generally high. By adopting different uplink power control parameters for different uplink subframes, the uplink transmission performance of the flexible subframes interfered by the downlink transmission of neighboring cells can be improved as much as possible.

[0050] For closed-loop uplink power control, uplink subframes can be divided into two or more sets, and power control is performed separately. Taking the division of two subframe sets as an example, it can be divided into a fixed uplink subframe set and a flexible subframe set. The fixed uplink subframe set uses a set of closed-loop power control parameters, and the flexible subframe set uses another set of closed-loop power control ...

Embodiment 2

[0077] According to the above description, in a TDD system in which uplink and downlink configurations can change rapidly, the interference levels received by each uplink subframe may be different. Generally speaking, the uplink subframes subject to greater interference require greater uplink transmit power, which is more likely to reach the limit of the maximum transmit power of the UE and affect link performance; in addition, usually, the uplink subframes subject to greater interference The range of interference fluctuations is also relatively large, and the performance of using closed-loop power control to compensate for power changes is poor.

[0078] according to the above figure 2 In the analysis of , when the uplink reference uplink and downlink configuration 0 is adopted, when one UL Grant simultaneously schedules uplink transmission of two uplink subframes, the interference conditions of the two uplink subframes are generally different. In the existing LTE system, w...

Embodiment 3

[0102] In the existing LTE system, the base station can control the method of processing the HARQ-ACK information when the UE feeds back the HARQ-ACK on the PUSCH by setting the downlink allocation index (UL DAI) in the UL Grant. Specifically, the UL DAI is a value based on which the UE can calculate the number of bits of HARQ-ACK information that needs to be fed back on the PUSCH resource. However, for the case where the uplink reference uplink and downlink configuration 0 is used, the uplink index (UL index) is sent in the UL Grant without the UL DAI, which causes the UE to determine the number of bits of the HARQ-ACK information only according to the maximum binding window, resulting in Waste of resources.

[0103] according to the above figure 2 In the analysis of , when the uplink reference uplink and downlink configuration 0 is adopted, when one UL Grant simultaneously schedules uplink transmission of two uplink subframes, the interference conditions of the two uplink ...

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Abstract

The invention discloses a method for processing uplink transmission. The method comprises steps that: UE receives uplink reference uplink/downlink configuration and information of an interference level of an uplink subframe; the UE receives UL Grant, uplink transmission states of two subframes are scheduled simultaneously from the UL Grant, and a method for sending PUSCH and A-CSI is determined by the UE according to the interference level of the uplink subframe. The invention further discloses the method for processing uplink transmission. The method comprises steps that: the UE receives the uplink reference uplink/downlink configuration, the UE receives the UL Grant, the uplink subframe presently scheduled by a base station and indicating information of a bit number of HARQ-ACK information needing feedback are acquired according to a UL index domain; and the UE sends the PUSCH and the HARQ-ACK information with length of the bit number. Through the method for processing uplink transmission, on the condition that uplink reference uplink/downlink configuration 0 is employed, validity of power control can be guaranteed, uplink transmission performance is improved, and A-CSI transmission performance is guaranteed. The method can further reduce cost for transmitting the HARQ-ACK on the PUSCH.

Description

technical field [0001] The present application relates to a wireless communication system, and more specifically relates to a method and device for processing uplink transmission in an LTE system in which the duplex direction of a subframe can be flexibly changed. Background technique [0002] The Long Term Evolution (LTE) system supports the working mode of Time Division Duplex (TDD). Such as figure 1 Shown is the frame structure of the TDD system. The length of each radio frame is 10ms, which is equally 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 domains, namely downlink pilot time slot (DwPTS), guard interval (GP) and uplink pilot time slot (UpPTS), these 3 special domains The sum of the lengths is 1ms. Each subframe consists of two consecutive time slots, that is, the kth subframe includes time slot 2k and time slot 2k+1. The TDD system supports seven uplink and downlink configurations...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
CPCH04B7/26H04B7/2656
Inventor 李迎阳张世昌喻斌孙程君
Owner BEIJING SAMSUNG TELECOM R&D CENT
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