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Signal transmission method and device

A signal transmission and signal technology, applied in the field of communication, can solve the problems that the UE cannot feedback link quality, cannot execute, and loses power-saving performance, etc.

Pending Publication Date: 2021-07-23
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if there is no data transmission for multiple consecutive DRX cycles, the UE cannot perform channel state information (CSI) reporting (report) and send sounding reference signal (SRS), resulting in the UE being unable to feed back link quality and fail to receive energy-saving signals. Link adaptation is performed, and uplink timing information cannot be obtained at the initial stage of DRX ON, and fast uplink synchronization cannot be performed
The Rel-16 processing method is that the default UE does not perform CSI report and its SRS transmission during DRX OFF, unless the high-level signaling configures the UE to perform CSI report and SRS transmission during DRX OFF, but once the high-level signaling is configured in this way, it will cause The UE has to wake up every DRX OFF cycle, which will cause a large loss of power saving performance
At the same time, if the UE is in the sleep state for multiple consecutive DRX cycles, it may also have a destructive impact on the accuracy of the UE's receiving beam and its RRM measurement link maintenance performance.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0131] As mentioned above in the background technology section, currently Rel-16 has standardized the energy saving signal based on the group common PDCCH, and the energy saving signal carries a serial concatenation of multiple UE energy saving information packets. The information packet of each UE in the Rel-16 standard consists of two parts, the first part: UE wake-up indication information, and the second part: secondary cell dormancy (SCells dormancy) indication information. The UE wake-up indication consists of 1 bit, and the two states indicate whether the UE is performing a wake-up operation or a sleep operation in the adjacent DRX cycle; the SCells dormancy indication information indicates that the UE performs PDCCH monitoring operations on those SCells after being awakened . Therefore, in the current standard, when the UE is not awakened, the first part of the corresponding information packet, for example, is bit 0, indicating that the UE will not wake up in the subse...

Embodiment 2

[0137] As described in Embodiment 1, the energy saving information group of the UE is pre-configured by RRC signaling. The base station can configure the energy saving information (that is, the first energy saving information) when the UE is instructed to wake up for the base station. Of course, the wakeup indication itself is the energy saving information. Part; the base station also configures other indication information (that is, the second energy saving information) for the UE whose energy saving information indicates sleep, because when the UE is indicated to wake up by the energy saving signal, the DRX ON timer (timer) starts to start, and when the UE is instructed to sleep , the DRX ON timer in the DRXcycle configured by the UE does not start, so when the above-mentioned UE is indicated to be in the sleep state at this time, the information carried in the energy saving signal takes effect when the DRX ON timer is not started. When the DRX ON timer does not take effect, ...

Embodiment 3

[0141] The UE side receives the energy saving signal, and performs an energy saving operation according to the energy saving signal instruction.

[0142] The UE first decodes the energy-saving signal. If the wake-up indication indicates that the UE is awake, the UE parses the energy-saving information corresponding to the wake-up state according to the high-level indication; if the wake-up indication indicates that the UE is sleeping, the UE parses the indication information corresponding to the sleep state according to the high-level indication.

[0143] If the wake-up indication information indicates that the UE is sleeping, the energy-saving information corresponding to the beam indication information is carried, and the receiving beam is updated according to the new transmission beam carried by the energy-saving signal during subsequent signal / channel reception. If the UE energy-saving information also carries TRS or CSI report or L1-RSRP measurement or SRS transmission ins...

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PUM

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Abstract

The invention discloses a signal transmission method and device, which are used for fully utilizing useless DCI bits when it is indicated that a terminal sleeps so as to improve the receiving quality and link maintenance performance of the terminal. The signal transmission method provided by the invention comprises the following steps: determining an energy-saving signal needing to be sent, wherein the energy-saving signal comprises first indication information used for indicating that the terminal is in a wake-up state and first energy-saving information corresponding to the first indication information, or the energy-saving signal comprises second indication information used for indicating that the terminal is in a sleep state and second energy-saving information corresponding to the second indication information; and sending the energy-saving signal to a terminal.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a signal transmission method and device. Background technique [0002] In the 5G new wireless (New Radio, NR) system, the current working state of the terminal (UE) is divided into three types: idle state (RRC_IDLE), inactive state (RRC_Inactive) and connected state (RRC_Connected). Only a UE in RRC_Connected is allowed to detect, for example, a Physical Downlink Control Channel (PDCCH) scrambled by a Cell-Radio Network Temporary Identifier (C-RNTI). Since the power consumption of NR terminals in RRC_Connected mode (mode) has a decisive impact on system power consumption, NR Release 16 (Rel-16) standardizes UE power saving in connected state. In the RRC_Connected state, the UE needs to continuously monitor the downlink control channel PDCCH (such as C-RNTI scrambling) to learn the transmission information of the downlink PDSCH. The packet-based data flow is ...

Claims

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Application Information

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IPC IPC(8): H04W76/25H04W76/28H04W52/02
CPCH04W76/25H04W76/28H04W52/0235H04W52/02H04W52/00Y02D30/70
Inventor 王加庆杨美英罗晨郑方政
Owner DATANG MOBILE COMM EQUIP CO LTD