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Method and device for uplink data transmission in random access process

A technology of random access process and data transmission method, applied in the field of mobile communication, can solve the problems of low resource utilization rate and poor flexibility, and achieve the effect of reducing the repeated transmission of Msg3

Active Publication Date: 2022-01-18
CHINA ACADEMY OF INFORMATION & COMM
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Problems solved by technology

[0003] This application proposes a method and device for uplink data transmission in the process of random access, which solves the problems of poor flexibility and low resource utilization in existing methods, and is especially suitable for RACH (Random Access Channel) in mobile communication systems technology

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  • Method and device for uplink data transmission in random access process
  • Method and device for uplink data transmission in random access process
  • Method and device for uplink data transmission in random access process

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Embodiment Construction

[0034] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0035] In mobile communication systems, such as 4G LTE and 5G systems, the random access technology adopted includes 4-step RACH (Random Access Channel, random access channel) technology and 2-step RACH technology.

[0036] In the 4-step RACH technology, five times of information interaction between the terminal and the base station is required to com...

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Abstract

The present application discloses a method for transmitting uplink data in a random access process, which includes the following steps: obtaining configuration information, DCI information and RAR indication information, the configuration information includes one or more Msg3 repeated transmission parameters, if the DCI information or RAR indication information contains information indicating the number of Msg3 repeated transmissions, then determine the number of Msg3 repeated transmissions according to the DCI information or RAR indication information, if neither the DCI information nor the RAR indication information is obtained Information indicating the number of repeated transmissions of Msg3, and the configuration information also includes first preamble group information and or RO group information, then according to the selected preamble sequence and RO resource, determine the repeated transmission of Msg3 from the configuration information The number of times: according to the determined number of Msg3 repeated transmissions, the Msg3 information is repeatedly transmitted. The present application also includes a device for applying the method. The present application solves the problems of poor flexibility and low resource utilization in the existing method, and is especially suitable for the RACH technology of the mobile communication system.

Description

technical field [0001] The present application relates to the technical field of mobile communication, and in particular to an uplink data transmission method and device in a random access process. Background technique [0002] The current standard does not support PUSCH retransmission based on the uplink grant (UL Grant) scheduling in the Random Access Response (RAR). Therefore, Msg3 based on the UL Grant scheduling in the RAR only supports one transmission. When the base station fails to receive Msg3, The retransmission of Msg3 can be scheduled through DCI. The main problem of the DCI-based retransmission mechanism is that it will introduce new scheduling signaling overhead and scheduling delay, reducing transmission efficiency. The existing technology proposes to support the repeated transmission technology of uplink transmission of Msg3 and RRC connection state, that is, configure a common Msg3 repeated transmission parameter (such as Msg3-AggregationFactor) on the init...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04W74/00H04L5/00H04L1/18
CPCH04W74/0833H04W74/004H04W74/006H04L5/0048H04L5/0094H04L1/1867H04L1/1829
Inventor 沈霞杨思远闫志宇杜滢焦慧颖刘晓峰魏贵明徐菲
Owner CHINA ACADEMY OF INFORMATION & COMM
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