Random access method and device

A technology of random access and random access preamble, applied in the directions of synchronization devices, location-based services, wireless communication, etc., can solve the problem of inability to calculate RA-RNTI, inability to distinguish preambleRO resources, and reduce system random access capacity, etc. question

Active Publication Date: 2021-01-05
HUAWEI TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

As a result, when the network device receives the preamble at the time domain position of the overlapping part, it cannot distinguish which RO resource the preamble corresponds to, and thus cannot calculate the correct RA-RNTI
If the RO cycle is increased, the random access capacity of the entire system will be reduced

Method used

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Embodiment Construction

[0050] In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings. The specific operation methods in the method embodiments can also be applied to the device embodiments or system embodiments. Wherein, in the description of the present application, unless otherwise specified, "plurality" means two or more.

[0051] Such as figure 1 As shown in , it is a schematic diagram of a possible network architecture applicable to this application, including network devices and at least one terminal device. The network device and the terminal device can work on a new radio (new radio, NR) communication system, and the terminal device can communicate with the network device through the NR communication system. The network device and the terminal device may also work on other communication systems, which is not limited in this embodiment of the present ...

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Abstract

The invention provides a random access method and device. The random access method comprises the steps that: terminal equipment acquires a position of the terminal equipment and a position of networkequipment; the terminal equipment determines a time adjustment amount according to the position of the terminal equipment and the position of the network equipment; and the terminal equipment sends arandom access preamble according to the time adjustment amount and a random access channel RACH resource configured by the network equipment. Based on the random access method and the device, the terminal equipment supports positioning, the terminal equipment can determine the time adjustment amount according to the position of the terminal equipment and the position of the network equipment, andadjust the time for sending the random access preamble on an RACH resource according to the time adjustment amount, so that the problem of overlapping of receiving time windows of the random access preamble is favorably avoided, and therefore, the success rate of accessing the terminal equipment to the network equipment can be improved while the random access capacity of the whole system is not reduced.

Description

technical field [0001] The present application relates to the technical field of mobile communication, and in particular to a random access method and device. Background technique [0002] During the wireless communication process, the terminal device needs to obtain uplink synchronization with the network device through a random access process for subsequent communication. Before random access, the network device broadcasts Random Access Channel Occasion (RACH Occasion, or RO for short) resources to the terminal device, and the terminal device performs random access according to the RO resource broadcast by the network device. RO resources include time domain resources and frequency domain resources, and one RO resource may also be called one RACH resource. [0003] The random access process mainly includes the following steps: [0004] In step 1, the terminal device selects a random access preamble (random access preamble, which may also be referred to as preamble for sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W64/00H04W74/08
CPCH04W74/0833H04W4/029H04L5/0048H04W4/02H04W64/00H04W56/0045H04W72/0446H04W74/002H04W74/0841H04W74/0866H04W72/23
Inventor 许斌李秉肇陈磊王宏
Owner HUAWEI TECH CO LTD
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