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Generation method for random access preamble sequence and indication method and device

A random access preamble and preamble sequence technology, applied in the direction of synchronization device, multiplexing code generation, modulated carrier system, etc., can solve the problem of serious frequency offset

Active Publication Date: 2018-07-24
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, considering that in the high-band wireless communication environment, the frequency offset caused by phase noise is relatively serious, the current preamble format in LTE will not be able to meet the random access requirements in 5G, and it is necessary to develop a new preamble format and preamble generation. way to meet the access requirements of 5G

Method used

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  • Generation method for random access preamble sequence and indication method and device
  • Generation method for random access preamble sequence and indication method and device
  • Generation method for random access preamble sequence and indication method and device

Examples

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Embodiment 1

[0093] In this embodiment, a method for generating a random access preamble will be introduced in conjunction with a specific system. Assuming that the system works in the high-frequency band, in order to compensate for the serious path loss in the high-band wireless communication environment, both the base station and the terminal adopt beamforming or hybrid beamforming, and obtain beamforming by matching beam pairs at both ends of the transceiver. gain.

[0094]In the solution provided by this embodiment, the format of the random access preamble is as follows figure 2 shown.

[0095] Such as figure 2 As shown, the random access preamble in this embodiment consists of multiple identical or different sequences (such as figure 2 Sequence 1, sequence 2...sequence M) shown in the sequence, a cyclic prefix (Cyclic Prefix, CP) is added before each sequence, and a guard interval (Guard Time, GT) is added after all the sequences. In this embodiment, firstly, the way of generat...

Embodiment 2

[0128] In this embodiment, a method for generating a random access preamble will be introduced in conjunction with a specific system. The solution described in Example 1 is that multiple sequences constituting a leader sequence are generated from the same basic sequence. In this embodiment, multiple sequences constituting one leader sequence are generated from different basic sequences. In this embodiment, it is still assumed that the system works in a high frequency band, and multi-beam operation and hybrid beamforming or analog beamforming are adopted to obtain a beamforming gain sufficient to compensate for path loss.

[0129] The leading sequence structure adopted in this embodiment is as follows Image 6 shown.

[0130] Image 6 In the structure shown, a leader sequence is composed of multiple sequences, each sequence is preceded by CP, and GT is added at the end of the leader sequence. Among them, every M_s sequences are generated from the same basic sequence, which ...

Embodiment 3

[0139] This embodiment provides a mapping relationship between downlink broadcast channels and random access resources in combination with the random access preamble structure provided by the present invention. In this embodiment, the system adopts multi-beam operation, that is, a large-scale coverage is achieved through multiple narrow beams. Meanwhile, the base station adopts multiple synchronization signal blocks, and each synchronization signal block includes a primary synchronization signal, a secondary synchronization signal and a broadcast channel. Each synchronization signal block corresponds to a different or the same transmit beam at the base station side. The broadcast channel in the sending beam block notifies the time-frequency resource location information of the random access channel corresponding to the corresponding synchronization signal block (or broadcast channel) and the corresponding random access preamble resource pool information through the system info...

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Abstract

The invention discloses a generation method for a random access preamble sequence. The generation method comprises the steps that random access configuration information is received, wherein the random access configuration information comprises preamble sequence resource pool information which comprises an available basic sequence; M sequences are generated according to the basic sequence, whereinM is greater than 1; and the random access preamble sequence is generated according to the M sequences. The invention further discloses a generation method for the random access preamble sequence anda random access configuration information indication method and device. According to the technical scheme, the random access preamble sequence can adapt to a 5G mid-high-frequency multi-beam operation, and the performance of the system random access process is improved.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a method and device for generating a random access preamble sequence, and a method and device for indicating random access configuration information. Background technique [0002] With the rapid development of the information industry, especially the growing demand from the mobile Internet and the Internet of Things (IoT, internet of things), it brings unprecedented challenges 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 connec...

Claims

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Application Information

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IPC IPC(8): H04J13/12H04W74/08
CPCH04J13/12H04W74/0833H04W56/001H04L27/2613H04L27/2607H04W74/006H04J13/0062H04J13/004H04W74/002H04W72/04H04L27/2605
Inventor 钱辰喻斌熊琦张英杰
Owner BEIJING SAMSUNG TELECOM R&D CENT
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