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Method and device for sending uplink control information on physical uplink shared channel

A technology for physical uplink sharing and control information, which is applied in the field of determining the target length of uplink control information, and can solve the problems of inability to find parameter values, long period, and degraded UCI information transmission quality.

Active Publication Date: 2011-11-30
盛菊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In LTE Rel-8, uplink only supports single-antenna transmission, so uplink transmission has only one codeword stream and only one layer. However, in LTE-A system, uplink can use multi-antenna transmission, so that uplink transmission has multiple streams or Multi-layer transmission, further there will be a case where a single codeword stream is mapped to two layers for transmission
[0019] The aforementioned UCI information is transmitted on the PUSCH for a single codeword stream, so when there is a single codeword stream mapped to two-layer transmission, the maximum number of REs available on each stream will be doubled instead of In this way, if the current calculation formula is still used, when the channel condition and the control information offset value In the case of no change, it will lead to a decrease in the quality of UCI information transmission
A direct method is that the base station configures a larger parameter to solve the above problem, but due to Using RRC configuration, its cycle is relatively long, so when a During the configuration period, if the codeword stream changes from single layer to two layers or from two layers to single layer, the transmission quality of UCI will not be well guaranteed
Additionally, if an expanded configuration of parameter values, there is also an expanded The problem that the parameter value cannot be found in the current table

Method used

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  • Method and device for sending uplink control information on physical uplink shared channel
  • Method and device for sending uplink control information on physical uplink shared channel
  • Method and device for sending uplink control information on physical uplink shared channel

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Embodiment 1

[0080] In this embodiment, it is assumed that the uplink transmission is based on a conventional cyclic prefix (CP, Cyclic Prefix), that is, there are 14 SC-FDMA symbols in the subframe, of which 2 symbols are used to send DMRS, and the number of transmission blocks for uplink transmission at the same time is 1. After the transmission block undergoes operations such as channel coding and rate matching, the corresponding codeword stream will be mapped to two-layer transmission. Further, in this embodiment, there is no SRS to be sent in the uplink transmission, the UE has service information to be sent, and at the same time, 4-bit CQI and 2-bit ACK / NACK need to be sent, and no RI information needs to be sent, so that the CQI and ACK / NACK are related to the service Information multiplexing is transmitted on PUSCH.

[0081] Assume that the UE detects that the bandwidth allocated by the base station is 1 RB through blind detection of PDCCH. At the same time, according to the MCS an...

Embodiment 2

[0091] In this embodiment, it is assumed that the uplink transmission is based on the conventional CP, that is, there are 14 SC-FDMA symbols in the subframe, and 2 symbols are used to send DMRS at the same time, and the number of transmission blocks for uplink transmission is 1 at the same time. After operations such as channel coding and rate matching, the corresponding codeword stream will be mapped to two-layer transmission. Further, in this embodiment, there is no SRS to be sent in the uplink transmission, and the UE has no service information to be sent, and there are 16-bit CQI, 2-bit ACK / NACK, and 1-bit RI information to be sent, so that CQI, RI and ACK / NACK NACK is multiplexed and transmitted on PUSCH.

[0092] Assume that the UE detects that the bandwidth allocated by the base station is 1 RB through blind detection of the PDCCH, and the modulation order is Q m =2.

[0093] The method for determining the number of modulation symbols after encoding different uplink c...

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Abstract

The invention discloses a method for sending uplink control information on a physical uplink shared channel, including: determining the following parameters: the maximum number of REs A available for the initial PUSCH, the number of bits of service information before coding B, the code rate offset, and the current The number of carriers D used for PUSCH transmission in the subframe, the maximum number of REs occupied by the modulation symbols encoded by the CQI / PMI information E; determine the target length of ACK / NACK information or the target length of / RI information according to the determined parameters, and / or the target length of the CQI / PMI information; encode and modulate the uplink control information according to the determined target length of the ACK / NACK information or the target length of the RI information and / or the target length of the CQI / PMI information, and together with the service information Multiplexed to PUSCH to send. The invention also discloses a device for sending uplink control information on the physical uplink shared channel. The invention maintains the compatibility with the LTE version 8 protocol, and the technical solution is relatively simple to implement.

Description

technical field [0001] The present invention relates to the technology for determining the target length of uplink control information, and in particular to the transmission of uplink control information (UCI, Uplink Control Information) in the physical uplink service shared channel ( A method and device for determining the target length during transmission on PUSCH (PhysicalUplink Shared Channel). Background technique [0002] In the Long Term Evolution (LTE, Long Term Evolution) system, the uplink control information UCI mainly includes channel quality indication information (CQI, Channel Quality Indication) / precoding matrix indication information (PMI, Precoded Matrix Indication), correct / error response information ( ACK / NACK, Acknowledgment / Negative Acknowledgment) and rank indication (RI, Rank Indication) information. Feedback of uplink control information can be performed based on a physical layer uplink control channel (PUCCH, Physical Uplink Control Information) and...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/00
Inventor 米德忠夏树强梁春丽
Owner 盛菊
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