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Signal transmission method and device, and computer storage medium

A signal transmission and signal technology, applied in the direction of pilot signal distribution, transmission path separation device, wireless communication, etc., can solve the problems of reference signal interference, interference, affecting system measurement performance and demodulation performance, etc., to achieve improved demodulation Performance, performance improvement, and bit rate reduction effects

Active Publication Date: 2022-07-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the cells of the same frequency network, the data of adjacent cells may cause interference to the reference signal, and the reference signal may also cause interference to the data of adjacent cells. The interference between cells will affect the measurement performance and demodulation performance of the system.

Method used

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  • Signal transmission method and device, and computer storage medium
  • Signal transmission method and device, and computer storage medium
  • Signal transmission method and device, and computer storage medium

Examples

Experimental program
Comparison scheme
Effect test

application example 1

[0141] This embodiment is mainly used to configure a data muting mode to reduce interference between cells.

[0142] (1): Configure a data muting mode for the UE through user-specific RRC configuration signaling. The user-specific RRC configuration signaling includes the fields shown in Table 1 or Table 2:

[0143]

[0144] Table 1

[0145]

[0146] Table 2

[0147] In the data muting mode, the resource elements on the OFDM symbol where the narrowband reference signal (NRS) is located except the resource element where the reference signal is located are set as silent resource elements; no data mapping or data transmission is performed on the silent resource elements, such as Figure 9 shown.

[0148] (2): After receiving the RRC configuration signaling of the data muting mode, the UE receives the unicast control channel (NPDCCH on the unicast search space USS) and / or the downlink data channel (NPDSCH) according to the data muting mode.

application example 2

[0150] This embodiment is mainly used to configure a codeword mapping extension mode to reduce interference between cells.

[0151] (1): Configure the codeword mapping extension mode for the UE through user-specific RRC signaling. The user-specific RRC configuration signaling includes the fields shown in Table 2:

[0152] 0 No rate matching extension / codeword mapping extension 1 Rate Matching Extension / Codeword Mapping Extension

[0153] table 3

[0154] In the enhanced interference cancellation mode, when the data is repeatedly sent (repetition), the codeword mapping is extended to 2N according to the number of repetitions SF or 2 n ×N SF over subframes, that is, rate matching at 2N SF or 2 n ×N SF subframes, N SF is the number of subframes indicated by resource allocation in the downlink control information. n is an integer greater than 1. When the coding rate is greater than a threshold or when the number of repetitions is greater than a thres...

application example 3

[0159] This embodiment is mainly used to configure reference signals to be sent in invalid subframes in the NB-IoT embedded LTE operation mode (ie, inband mode) to reduce inter-cell interference.

[0160] (1) The reference signal is configured to be sent in an invalid subframe through a system message or user-specific RRC signaling.

[0161] Here, the reference signal is transmitted on invalid subframes. The reference signals include cell-specific reference signals and / or user-specific reference signals. The pattern of the reference signal (ie the position of the reference signal in the time domain and / or the frequency domain) is related to the cell identity. The invalid subframes are idle invalid subframes. The idle invalid subframes refer to subframes that do not send common signals such as synchronization signals, broadcast messages, or system messages and are configured as invalid subframes. Sending reference signals on invalid subframes can be configured through user-s...

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Abstract

The invention discloses a signal sending method and device, and a computer storage medium. The method includes: sending a reference signal on the invalid subframe. The method further includes: for the guard band working mode, if the downlink time slot in the special subframe includes N downlink symbols, determining the N downlink symbols for sending the reference signal. The method also includes: extending the codeword mapping over a preset number of subframes or resource elements for transmission. The method further includes: sending a reference signal on an OFDM symbol, and resource elements on the OFDM symbol other than the resource element where the reference signal is located are silent resource elements, wherein no data mapping or data mapping is performed on the silent resource elements. data sent.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and in particular, to a signal transmission method and device, and a computer storage medium. Background technique [0002] In order to meet the needs of the cellular Internet of Things, in the Rel-13 protocol version released by the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project), the Narrow Band Internet of Things (NB-IoT, Narrow Band Internet of Things) access system is supported. . In subsequent versions of the Rel-14 protocol, the NB-IoT system was enhanced with enhanced functions including positioning, multicast, reduced latency, reduced power consumption, and enhanced non-anchor carrier operation. In order to support a wider range of IoT applications and deployment scenarios, the NB-IoT system will continue to be enhanced in Rel-15 and later protocol versions. [0003] In the NB-IoT system, the sequence reference signal (hereinafter re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L67/12H04W24/00
CPCH04L5/0048H04L67/12H04W24/00H04L27/2613H04L27/26136H04L5/005H04L5/0051H04L5/0007H04L5/0073H04L5/0094
Inventor 方惠英戴博陈宪明林伟李书朋
Owner ZTE CORP