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Uplink control signaling transmission method and user equipment

A technology for user equipment and control signaling, applied in the field of digital communication, can solve problems such as detection errors, reduce system throughput, and fail to obtain ACK/NACK response information, and achieve the effect of avoiding retransmission and improving throughput

Active Publication Date: 2010-09-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Therefore, in the LTE-A FDD system, if the UE needs to send SR information and ACK / NACK response information on an uplink component carrier at the same time, there are situations where multiple ACK / NACK response information and SR information need to be sent at the same time. Similarly, if When the UE needs to send ACK / NACK response information and CSI information on one uplink component carrier at the same time, there are situations where multiple ACK / NACK response information and CSI information need to be sent at the same time. Some companies believe that this situation can be used in the LTE TDD system. method, but since the ACK / NACK response information of each downlink component carrier cannot be obtained through b(0)b(1) in the LTE TDD system, the base station does not know which component carrier is detected incorrectly, so as long as not all component carriers Both feed back ACK, and the base station needs to retransmit all component carriers, thereby reducing the throughput of the system

Method used

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  • Uplink control signaling transmission method and user equipment
  • Uplink control signaling transmission method and user equipment
  • Uplink control signaling transmission method and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] In this embodiment, the number of downlink component carriers configured by the network side for the UE is M, and the grouping information of the M downlink component carriers agreed in advance between the network side and the UE is: the UE needs to divide the M downlink component carriers into two groups, wherein one group includes the first L downlink component carriers, and the other group includes M-L downlink component carriers (L Figure 4 shown, including the following steps:

[0083] Step 401: The UE divides the M downlink component carriers that need to feed back the response message into two groups according to the grouping information, one group includes the first L downlink component carriers, and the other group includes the remaining M-L downlink component carriers;

[0084] Step 402: The UE determines responses corresponding to each downlink component carrier group;

[0085] In this step, the UE determines the response corresponding to the downlink compone...

Embodiment 2

[0116] When the base station introduces a downlink assignment indicator (DAI: Downlink Assignment Indicator) control field in the PDCCH corresponding to each PDSCH, it is used to indicate the number of downlink component carriers scheduled for PDSCH transmission to the UE in the current subframe, and its value denoted as V DAI DL , where V DAI DL When the number of downlink component carriers transmitted by PDSCH detected according to PDCCH and the number of downlink component carriers transmitted by PDSCH without corresponding PDCCH are included, the process of UE transmitting uplink control signaling is as follows: Figure 9 shown, including the following steps:

[0117] Step 901: The UE first detects the number of downlink component carriers transmitted by the PDSCH according to the PDCCH, which is denoted as U in this embodiment DAI , and detect the number of downlink component carriers transmitted by PDSCH without PDCCH, which is denoted as N in this embodiment SPS ;...

Embodiment 3

[0148] When the base station introduces a downlink configuration indication control field into the PDCCH corresponding to each PDSCH, the control field includes two parts: the first part is used to indicate the number of downlink component carriers scheduled for PDSCH transmission to the UE in the current subframe, and the The value is denoted as V DAI DL , where V DAI DL Including the number of downlink component carriers detected according to the PDSCH transmission of the PDCCH and the number of downlink component carriers without PDSCH transmission of the corresponding PDCCH; the second part is used to indicate the accumulated downlink of the PDSCH transmission scheduled to the UE by the current component carrier The number of component carriers is the value after modulo 2, and its value is recorded as V DAI DLcounter , where the accumulated value starts from 0, and when the UE detects the PDCCH, it detects according to a certain frequency order. At this time, the UE t...

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Abstract

The invention discloses an uplink control signaling transmission method and user equipment, and relates to the field of digital communication. The method comprises the following steps of: receiving a physical downlink shared channel borne on a downlink component carrier through the user equipment, grouping all downlink component carriers required to feed back answer message according to the grouping information of the downlink component carrier appointed by the user equipment and a base station, and determining answers corresponding to each downlink component carrier group; and when the user equipment feeds back the answer message to the base station, sending answer information consisting of the determined answers corresponding to each downlink component carrier group and other uplink control signaling in the same uplink component carrier, wherein the other uplink control signaling is SR or CSI. The technical scheme of the invention avoids unnecessary retransmission so as to effectively improve the throughput of a system.

Description

technical field [0001] The present invention relates to the field of digital communication, in particular to a method for transmitting terminal and uplink control signaling in a multi-carrier system with large bandwidth and user equipment. Background technique [0002] The rapid development of digital communication systems puts forward higher requirements for the reliability of data communication. However, under harsh channels, especially in high data rate or high-speed mobile environments, serious problems such as multipath interference and Doppler shift affect system performance. Therefore, effective error control technology, especially Hybrid Automatic Repeat Request (HARQ) technology has become a research hotspot in the communication field. [0003] In the downlink HARQ of the long-term evolution system (LTE: Long Term Evolution), when the user equipment (UE : User Equipment) when there is no physical uplink shared channel (PUSCH: PhysicalUplink Shared Channel), it is ...

Claims

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Application Information

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IPC IPC(8): H04L1/16
Inventor 梁春丽杨维维戴博朱鹏喻斌
Owner ZTE CORP
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