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A random access method, device and system

A random access and random access request technology, applied in wireless communication, electrical components, etc., can solve problems such as not provided

Active Publication Date: 2021-09-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prior art does not provide a scheme for triggering the base station to allocate short TTI resources for the user equipment of the ultra-real-time service and to use the short TTI resource to perform signaling interaction with the user equipment during the random access process

Method used

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  • A random access method, device and system
  • A random access method, device and system
  • A random access method, device and system

Examples

Experimental program
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Embodiment 1

[0034] This embodiment describes the PRACH (hereinafter referred to as S-PRACH) that is defined outside of the existing PRACH time-frequency resources dedicated to super real-time services. in, figure 1 It is a schematic diagram of the configuration of PRACH time-frequency resources in the existing LTE system.

[0035] Optionally, as Figure 3a As shown, the S-PRACH and the existing PRACH occupy the same time domain location with a TTI of 1 millisecond, but different resource locations in the frequency domain, and the frame structure of the S-PRACH is also a TTI of 1 millisecond.

[0036] Specifically, in the existing LTE system, a random access radio network temporary identifier (RA-RNTI, RandomAccess-Radio Network Temporary Identifier) ​​is used to identify a time-frequency resource location used by the user equipment to send a preamble. RA-RNTI=1+t-id+10*f-id, where t_id represents the first subframe number where the PRACH that sends the preamble is located, and f_id repr...

Embodiment 2

[0045] This embodiment describes that part of the preamble is divided into the existing preamble for mapping super real-time services.

[0046] In the LTE system, the preamble used for random access is carried on the PRACH. In order for the base station to obtain the service feature information of the user equipment in the process of sending the preamble by the user equipment, so that the base station can reasonably allocate the uplink authorization resources, the 64 preambles used for random access in an existing cell are divided into partial preambles Used to map hyper-real-time business. Specifically, the system determines the proportion of preambles for dividing and mapping the ultra-real-time service according to the proportion of the number of user equipments with the ultra-real-time service and the short TTI support capability in the cell to the total number of user equipments.

[0047] In this embodiment, the base station adds the configuration information of the prea...

Embodiment 3

[0049] This embodiment specifically describes the manner in which the base station sends a random access response (RAR, Random Access Response) after the base station receives the preamble sent by the user equipment.

[0050] Specifically, after the base station receives the preamble sent by the user equipment, the manner in which the base station sends a random access response (RAR, Random Access Response) includes any of the following:

[0051] The base station sends the RAR to the user equipment on a subframe resource with a TTI length of 1 millisecond. Specifically, not all user equipments that initiate a random access request at a certain moment have the short TTI support capability, or the moment is used for sending the RAR. If the physical downlink shared channel (PDSCH, Physical Downlink Shared Channel) resource of the RAR has no short TTI resource, the base station will send the RAR on the subframe resource with a TTI length of 1 millisecond;

[0052] The base station...

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Abstract

The present invention discloses a random access method, device and system, comprising: user equipment receives configuration information of a physical random access channel (PRACH) dedicated to super real-time services and / or a preamble sequence dedicated to super real-time services ( preamble) configuration information; when the user equipment has ultra-real-time services and has a short transmission time interval (TTI) support capability, the user equipment is configured according to the configuration information of the PRACH dedicated to the ultra-real-time service and / or the configuration of the preamble sequence dedicated to the ultra-real-time service Information, send the preamble sequence to the base station through the PRACH resource dedicated to the ultra-real-time service, or send the preamble sequence dedicated to the ultra-real-time service to the base station, so as to trigger the base station to allocate short TTI resources for the user equipment. The random access method, device and system disclosed in the present invention can realize that the user equipment with super real-time service and short TTI support capability triggers the base station to allocate short TTI resources for the user equipment during the random access process.

Description

technical field [0001] The present invention relates to wireless communication technologies, and in particular, to a random access method, device and system. Background technique [0002] The rapid development of mobile Internet, Internet of Things and other business applications has become the main driving force for the development of the fifth generation mobile communication technology (5G). They urgently require 5G to have an access rate comparable to optical fiber, the connection capability of hundreds of billions of devices, a perfect real-time experience, and wireless broadband access anytime, anywhere. In addition, important indicators such as energy consumption efficiency, spectral efficiency and peak rate also need to be comprehensively considered in the design of 5G systems. China has established the IMT-2020 (5G) Promotion Group in 2013 to promote the development of 5G technology. According to the overall international situation, it is expected that 5G vision, k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08
CPCH04W74/0841H04W74/0838H04W74/006H04W72/0446H04W74/0833
Inventor 刘旭戴谦艾建勋邹伟
Owner ZTE CORP
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