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DCI configuration method and device, random access method and device, equipment and medium

A configuration method and random access technology, applied in the field of wireless transmission, can solve problems such as random access process restrictions

Active Publication Date: 2020-02-04
CHINA MOBILE COMM LTD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention discloses a DCI configuration, random access method, device, equipment, and medium to overcome the problem of restricting the random access process caused by DCI format 1A in the prior art only supporting the allocation of one preamble

Method used

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  • DCI configuration method and device, random access method and device, equipment and medium
  • DCI configuration method and device, random access method and device, equipment and medium
  • DCI configuration method and device, random access method and device, equipment and medium

Examples

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Embodiment 1

[0117] In the scenario of non-contention-based random access triggered by PDCCH order, DCIformat 1A in the existing format only supports the allocation of one preamble, so the UE can only send one preamble to the base station, so the UE cannot select an uplink beam.

[0118] In response to the regulations in the latest progress of 3GPP RAN1, the embodiment of the present invention provides a DCI configuration method, such as figure 2 As shown, the method includes the following steps:

[0119] Step S201: Generate DCI carrying identification information indicating multiple preambles.

[0120] Since the DCI format 1A of the existing format contains a 6-bit Preamble Index field (field) to indicate the ID information of the preamble assigned by the base station to the UE, so in the embodiment of the present invention, the generation carries identification information indicating multiple preambles The DCI includes:

[0121] Modifying the existing Preamble Index field in the DCI s...

Embodiment 2

[0132] Since there are 64 existing preambles, the preamble allocated by the base station to the UE may be a preamble with consecutive values ​​corresponding to the ID information, or a plurality of preambles with mutually independent values ​​corresponding to the ID information. In order to indicate the preamble assigned by the base station to the UE, 64 preambles can be grouped in advance, so that each group includes at least two preambles. Therefore, only the existing PreambleIndex in DCI format 1A is required when indicating The field only needs to carry group identification information.

[0133] That is to say, in the embodiment of the present invention, the modification of the existing Preamble Index field in the DCI, so that the modified Preamble Index field indicates the identification information of multiple preambles includes:

[0134] The existing Preamble Index field in the DCI carries the group identification information of the group to which the preamble belongs, ...

Embodiment 3

[0145] On the basis of the above embodiments, when the Preamble Index field carries the group identification information of the preamble belonging group, in order to avoid confusion with the ID information of the preamble carried in the Preamble Index field in the prior art, the indication is unclear, so it can be Modify the name of the Preamble Index field.

[0146] Therefore, in the embodiment of the present invention, the modifying the existing Preamble Index field in the DCI further includes:

[0147] Change the name of the existing Preamble Index field in the DCI to Preamble Group Index.

[0148] It should be noted that the length of the Preamble Group Index field may be the same as that of the existing PreambleIndex field, or may be a subset of the length of the existing Preamble Index field. Wherein, it should also be noted that, in the embodiment of the present invention, the name and length of the Preamble Group Index are not specifically limited, and only the functi...

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Abstract

The present invention relates to the technical field of wireless transmission, and provides a DCI configuration method and apparatus, a random access method and apparatus, a device and a medium, the DCI configuration method comprising: generating DCI carrying recognition information indicating a plurality of preambles; and sending the DCI as a PDCCH (Physical Downlink Control Channel) order to UE(User Equipment). The method comprises the following steps of: sending DCI (Downlink Control Information) serving as a PDCCH (Physical Downlink Control Channel) order to UE (User Equipment) through abase station; wherein the DCI carries recognition information for indicating a plurality of preambles; therefore, the UE can associate a plurality of preambles indicated by the DCI with a plurality ofuplink beams; according to the embodiments of the present invention, the multiple Msg.1 beams are transmitted to the base station through the PRACH resources corresponding to the uplink beams, so that not only is the multi-beam transmission of the multiple Msg.1 realized, but also the autonomous selection of the uplink beams by the UE is realized, and the random access process is optimized.

Description

technical field [0001] The present invention relates to the technical field of wireless transmission, in particular to a DCI configuration, random access method, device, equipment and medium. Background technique [0002] In 5G (5th-Generation, fifth-generation wireless communication technology) NR (New Radio, New Radio), the physical layer introduces the concept of beams, which can be specifically divided into uplink beams and downlink beams. When performing random access, the UE (User Equipment, user equipment) may transmit a message command based on a PRACH (Physical Random Access Channel, Physical Random Access Channel) resource corresponding to an uplink beam. [0003] In the prior art, non-contention based random access procedures such as figure 1 Shown: [0004] The base station will send DCI (Downlink Control Information, downlink control information) as PDCCH order to UE through PDCCH (Physical Downlink Control Channel, physical downlink control channel), that is,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/006H04W74/0833H04W74/002
Inventor 韩星宇刘洋孙军帅王莹莹
Owner CHINA MOBILE COMM LTD RES INST
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