Random access method and device

A random access, unified technology, used in pilot signal distribution, digital transmission systems, electrical components, etc.

Active Publication Date: 2019-07-19
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sending multiple preambles is different from the current random access method based on a single preamble. The user equipment needs to explicitly send multiple preambles. Sequence selection, beam selection, random

Method used

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Examples

Experimental program
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Embodiment 1

[0157] In this embodiment, in a contention-free random access scenario, how the random access based on multiple preambles proposed by the present invention is performed.

[0158] The UE obtains the measurement reference signal configured by the base station equipment, including a synchronization signal block (Synchronization signal block) and / or a channel state information reference signal (Channel State Information–Reference Signal, CSI-RS). The synchronization signal block may include a primary synchronization signal, a secondary synchronization signals, and broadcast signals including demodulation reference signals;

[0159] The UE obtains the measurement result of the measurement reference signal by measuring the configured measurement reference signal, such as received signal received power (RSRP), then

[0160] 1. The UE can feed back the measurement results of all configured measurement reference signals to the base station equipment:

[0161] a. Handover scenario: the...

Embodiment 2

[0225] In this embodiment, how the random access based on multiple preambles proposed by the present invention works in a contention-based random access scenario.

[0226] The UE reads the random access resources available in the cell (including random access channel resources, random access channel resources, random access input preamble resources, and the possible mapping relationship between measurement reference signals and random access resources). Through the measurement results of the measurement reference signal (such as RSRP, signal-to-noise ratio SNR, block error rate BLER, etc.), the UE can:

[0227] 1. Select N measurement reference signal indexes with the best measurement results (such as the largest RSRP, the largest signal-to-noise ratio SNR, the lowest block error rate BLER, etc.);

[0228] 2. Based on the preset or configured threshold value, select all measurement reference signal indexes whose measurement results meet the threshold value (such as RSRP great...

Embodiment 3

[0281] The above two implementations introduce two situations in which the UE obtains the configuration of random access resources. One is that the UE reports the measurement results, and the base station equipment configures the corresponding random access resources; the other is that the UE reads the configuration of the base station equipment. , to obtain all possible random access resource configurations, and select the index of the measurement reference signal (that is, the downlink transmission beam) according to the own measurement result, and then obtain the random access resource selected by oneself. However, for random access in unlicensed spectrum, UE needs to perform LBT (listen before talk) on the possible random access channel first, that is, a period of time before actually sending the signal (expressed as LBT time). Trying to receive a signal on the channel where the signal is sent, if the received signal energy is not lower than the preset or configured thresho...

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Abstract

The invention provides a random access method and device, and the method comprises the steps: user equipment (UE) determining a random access resource; and when it is determined that random access based on a plurality of preambles can be carried out according to the random access resources, determining a preamble sequence and an uplink sending beam which send the plurality of preambles to carry out random access based on the plurality of preambles. According to the method and the device, random access of a plurality of preambles can be realized.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular, the present invention relates to a random access method and device. Background technique [0002] With the rapid development of the information industry, especially the growing demands from the mobile Internet and the Internet of Things (IoT), unprecedented challenges are brought to future mobile communication technologies. For example, according to the report ITU-R M.[IMT.BEYOND 2020.TRAFFIC] of the International Telecommunication Union ITU, it can be predicted that by 2020, the growth of mobile traffic will increase by nearly 1,000 times compared to 2010 (4G era), and the number of user equipment connections will also increase. It will exceed 17 billion. As massive IoT devices gradually penetrate into mobile communication networks, the number of connected devices will become even more astonishing. [0003] In response to this unprecedented challenge, the c...

Claims

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Application Information

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IPC IPC(8): H04W74/00H04W74/08H04L5/00
CPCH04W74/008H04W74/0833H04L5/0048
Inventor 熊琦钱辰喻斌
Owner BEIJING SAMSUNG TELECOM R&D CENT
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