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Transmitting and receiving devices for reliable reception of control messages

A technology for sending devices and controlling messages, which is applied in the direction of forward error control, selective content distribution, multiple use of transmission paths, etc., and can solve problems such as high interference

Active Publication Date: 2021-06-25
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Transmitting and receiving devices for reliable reception of control messages
  • Transmitting and receiving devices for reliable reception of control messages
  • Transmitting and receiving devices for reliable reception of control messages

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[0105] In LTE and NR cellular systems, downlink control information (DCI) messages are sent in the DL to inform the DL receiver or UL transmitter of the transmission parameters to be used for reception or transmission of subsequent data messages, For example, modulation, FEC code rate, and time-frequency resources. Conventionally, a CRC word is calculated based on the DCI message and appended to the DCI to obtain a control packet. Then, the obtained control packet (ie, DCI plus CRC word) is FEC-encoded and transmitted.

[0106]When the decoded control packet contains residual FEC decoding errors, the CRC check often fails, invalidating the control information message. Less common, but not negligible, erroneous FEC-decoded control packets pass the CRC check, thus causing false alarm events. In order to reduce the probability of false alarms, the inventors herein propose to provide a second CRC word, which can be FEC encoded together with the control packet and sent to the rec...

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Abstract

The invention relates to a transmitting device (100) and a receiving device (300) for reliable reception of control messages such as downlink control information. The transmitting device (100) forms a control message (510) which comprises control information, a first CRC word (W1) and a second CRC word (W2). The control message (510) is sent to the receiving device (300) which obtains a first CRC check outcome based on performing a first CRC check on the control message (510), and a second CRC check outcome based on performing a second CRC check on the control message (510). Thereby, more reliable reception of control messages (510) is possible. Furthermore, the invention also relates to corresponding methods and a computer program.

Description

technical field [0001] The invention relates to a sending device and a receiving device for reliably receiving control messages. Furthermore, the invention also relates to a corresponding method and computer program. Background technique [0002] In mobile wireless cellular systems such as 3GPP LTE and NR, each downlink / uplink (DL / UL) data transmission is preceded by a DL control information (DCI) message, which The information message informs the DL receiver / UL transmitter of the transmission parameters to be used for the reception / transmission of the subsequent data message. The transmission parameters may, for example, relate to modulation, FEC code rate, time-frequency resources, and the like. Usually in 3GPP NR, a predefined time-frequency resource called a control resource set (Control Resource Set, CORESET) is collectively sent to control information messages. Control transmissions use a subset of the CORESET time-frequency resources; each of the CORESET subsets th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/2383H04L1/00H04L1/20H03M13/09H03M13/29H03M13/00H04L1/18H04L5/00H04W72/12
CPCH03M13/09H03M13/091H03M13/2906H03M13/6525H04L1/0061H04L1/0072H04L1/1896H04L5/0023H04L5/0053H04N21/2383
Inventor 阿娜伊德·罗伯特·萨法维阿尔伯托·杰赛普·佩罗蒂布兰尼斯拉夫·M·波波维奇托斯顿·斯科尔
Owner HUAWEI TECH CO LTD
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