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A random access method and device

A technology of random access and physical random access, applied in the field of communication, can solve problems such as collisions, reduce the probability of collision, reduce the time for blind detection of preambles, and reasonably allocate uplink resources.

Active Publication Date: 2022-06-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the embodiments of the present invention is to provide a random access method and device to solve the problem in the prior art that terminals that have received different SS block information choose the same preamble and conflict occurs

Method used

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  • A random access method and device
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  • A random access method and device

Examples

Experimental program
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Embodiment 1

[0036] see figure 1 , this embodiment shows a random access method implemented on the base station side, which can send multiple signal blocks on the base station side, and send signal block feature information; the signal block message carries the signal block index number of the signal block; The block feature information includes the correspondence between the signal block index number and the physical random access channel resources allocated for the signal block, and the correspondence between the signal block index number and the preamble index of the preamble used by the signal block; in this embodiment , the signal blocks mapped to the same physical random access channel resource use different preambles. In this embodiment, the base station and each terminal use random access to the first message MSG1 (abbreviation of Message 1), random access to the second message MSG2 (abbreviation of Message 2), and random access to the third message MSG3 (Message 3). Abbreviation)...

Embodiment 2

[0083] The following takes the signal block as the SS block as an example, combined with Figure 5 A random access method in this embodiment is introduced in detail. The SS block includes NR-PSS, NR-SSS, and two NR-PBCHs. like Figure 5 As shown, the random access method in this embodiment includes the following steps:

[0084] Step S500: the base station side sends the SSblock in the form of a wide beam at the PRACH time-frequency position of each SS block; wherein, the MIB information sent by the NR-PBCH carries information such as the SS block index number, the SS block period, etc.; the SSblock related information is provided by the system. The message SIB2 is sent, and the RACH-ConfigCommon cell in the system message SIB2 presses figure 2 The way of assigning a preamble to the SS block, the system message SIB2 also carries the relationship between the SS block index number and the time-frequency resource position of the physical random access channel, and the relation...

Embodiment 3

[0109] This embodiment shows a random access system including: Figure 8 The random access device shown and as Figure 9 The random access device shown.

[0110] like Figure 8 As shown, the random access device includes:

[0111] The first sending module 81 is used for sending a plurality of preset signal blocks, and sending signal block feature information; the signal block message carries the signal block index number of the signal block; the signal block feature information includes the signal block index number and the signal block index number for the signal block. The correspondence between the physical random access channel resources allocated by the signal block, and the correspondence between the signal block index number and the preamble index of the preamble used by the signal block; wherein, the signal blocks mapped to the same physical random access channel resources Different preambles are used;

[0112] The first random access processing module 82 is config...

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Abstract

The invention discloses a random access method and device. By sending a plurality of preset signal blocks carrying signal block index numbers and signal block feature information; Notifying the terminal of the corresponding relationship between the channel resource and the corresponding relationship between the signal block index number and the preamble index of the preamble used by the signal block; receiving the first random access message sent by each terminal; the first random access message carries A preamble used by the signal block selected by each terminal is used, since the preambles used by the signal blocks mapped to the same physical random access channel (PRACH) resource are different; The terminals initiate random access at the same time, and the preambles sent by each terminal are also different, so the present invention reduces the probability of collision when multiple terminals simultaneously initiate random access on the same PRACH resource.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular, to a random access method and device. Background technique [0002] With the popularization of smart terminals and the diversity of services, the demand for mobile data is growing exponentially. In the near future, with the rapid growth of smart terminals and tablet devices and the increase in data traffic consumed by a single user, the future network needs to provide 1,000 times the capacity of the existing network. The initial access process has been redesigned in 5G NR (the fifth-generation mobile communication new standard), taking into account the large path loss in high-frequency scenarios, synchronization (PSS (Primary Synchronization Signal, primary synchronization signal, used to transmit the ID within the group)) And SSS (Secondary Synchronization Signal, secondary synchronization signal, used to transmit group ID) and PBCH (Physical Broadcast Channe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/004H04W74/006H04W74/0833
Inventor 陈林李萍
Owner ZTE CORP
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