Unlock instant, AI-driven research and patent intelligence for your innovation.

Random access method and device, storage medium, user equipment and base station

A technology of random access and user equipment, which is applied in the field of communication, can solve problems such as lack and influence of random access response, and achieve the effect of improving the success rate and improving the utilization rate of time-frequency resources

Active Publication Date: 2019-04-05
SPREADTRUM COMM (SHANGHAI) CO LTD
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the NR communication system, 3GPP has not yet discussed the time-frequency tracking reference signal (Tracking Reference Signal, TRS) configuration of the user equipment in the idle state, and only configures the TRS in the radio resource control (Radio Resource Control, RRC) connected state , resulting in the lack of reference signals in the NR system to enable the user equipment to perform fine carrier time offset / carrier frequency offset estimation and delay spread / Doppler spread estimation, which affects the random access response (Random Access Response) reception of the idle state user equipment , RAR) success rate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Random access method and device, storage medium, user equipment and base station
  • Random access method and device, storage medium, user equipment and base station
  • Random access method and device, storage medium, user equipment and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] As mentioned in the background technology, in the LTE system, the user equipment in the idle state can use CRS to adjust one or more of the carrier time offset, carrier frequency offset, delay spread and Doppler spread to ensure that the idle state The downlink user equipment can successfully receive downlink information such as broadcast message / paging message / random access.

[0051] Wherein, the carrier time offset (Carrier Time Offset, CFO) is used to indicate the time offset of the carrier on the channel; the carrier frequency offset (Carrier Frequency Offset, CFO) is used to indicate the frequency offset of the carrier on the channel , the CFO may cause subcarrier crosstalk.

[0052] Regarding delay expansion, the signal arriving at the receiving end is a composite signal of various signals passing through different paths and having time differences. In the time domain, the synthesized signal will have a delay extension relative to the original signal.

[0053] D...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A random access method and device, a storage medium, a piece of user equipment and a base station are provided. The method includes the following steps: when random access based on a competition mechanism is carried out, an uplink preamble is sent to a base station; a PDCCH (Physical Downlink Control Channel) is determined by blind test according to the uplink preamble; a TRS (Tracking Reference Signal) is acquired from a preset time-frequency resource in a time slot where the PDCCH is located; the PDSCH in a preset time slot is compensated according to the TRS and the time slot where the PDCCH is located; and an RAR (Random Access Response) is acquired in the compensated PDSCH. The scheme of the invention can improve the success rate of RAR acquisition by user equipment.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a random access method and device, a storage medium, user equipment, and a base station. Background technique [0002] In the LTE system, the Cell Reference Signal (CRS) is an Always-On signal with a period of 5 milliseconds, and even a user equipment in an idle state can Use CRS to adjust one or more of the carrier time offset, carrier frequency offset, delay spread, and Doppler spread to ensure that the user equipment can successfully receive broadcast messages / paging messages / random access and other downlinks in the idle state information. [0003] However, in the NR communication system, 3GPP has not yet discussed the time-frequency tracking reference signal (Tracking Reference Signal, TRS) configuration of the user equipment in the idle state, and only configures the TRS in the radio resource control (Radio Resource Control, RRC) connected state , resulting ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04W72/04H04W74/00
CPCH04W72/0446H04W74/004H04W74/0833
Inventor 汪绍飞周化雨贾亚男
Owner SPREADTRUM COMM (SHANGHAI) CO LTD