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Method for initial access and random access, base station equipment and user equipment

A technology of user equipment and base station equipment, which is applied in the direction of synchronization devices, electrical components, radio transmission systems, etc., can solve the problems of long and long time for sending preamble sequences, and achieve the effects of reducing the probability of collision, shortening the time, and making small changes

Active Publication Date: 2022-06-21
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that in the prior art, it takes a long time to find the optimal beam pairing time in the random access process in the beamforming-based millimeter wave communication system, which leads to the problem that the preamble sequence transmission time is too long

Method used

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  • Method for initial access and random access, base station equipment and user equipment
  • Method for initial access and random access, base station equipment and user equipment
  • Method for initial access and random access, base station equipment and user equipment

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Embodiment 1

[0249] In this embodiment, we introduce a differential beam-based initial access and random access process in combination with specific system parameter settings. Consider a system operating in the millimeter wave band, both the base station and the user use Figure 5 , Image 6 The transmission structure based on the antenna array is shown.

[0250] in, Figure 5 is the transmitter structure, Image 6 For the UE structure. Figure 5 , each link after baseband processing is up-converted and connected to a digital-to-analog converter (DAC) to an antenna array composed of N_st antenna elements, and each antenna in the antenna array is only Phase can be adjusted. By adjusting the phase, the antenna array can form beams in the appropriate direction to complete the beamforming of the millimeter wave system. Image 6 The UE structure in the Figure 5 similar. Each baseband link is connected to an antenna array consisting of N_sr antenna elements. The antenna elements can onl...

Embodiment 2

[0291]This embodiment will introduce the initial access and random access procedures of using the differential beam scheme on the base station side and the traditional polling scheme for the user equipment under the condition that the reciprocity of the antenna array directions on the base station side and the user equipment side is established. If the number of antenna ports of the base station is 2, one port transmits and receives and beam sequences, and the other port transmits and receives differential beam sequences; if the number of antenna ports of the base station is greater than or equal to 3, the antenna ports can be arbitrarily divided into two parts, one of which is transceiver and beam sequence , and the other part transmits and receives the differential beam sequence. The system configuration is similar to that of the first embodiment. Both the base station and the user equipment are equipped with a transmission structure based on an antenna array, the base statio...

Embodiment 3

[0328] In this embodiment, a differential beam-based random access procedure is introduced in conjunction with specific system parameter settings. The system setting is similar to that of the first embodiment, and the base station and the user equipment adopt the transmission structure based on the antenna array. This embodiment will describe an initial access and random access process flow in which the user equipment adopts the differential transmission scheme and the base station adopts the traditional polling scheme under the condition that neither the base station side nor the user equipment side has directional reciprocity. If the number of antenna ports of the user is 2, one port will send and receive beam sequences, and the other port will send and receive differential beam sequences; if the number of antenna ports of the user is greater than or equal to 3, the antenna ports can be arbitrarily divided into two parts, one of which is transceiver and beam sequence , and t...

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Abstract

The present invention provides a method for initial access and random access based on multiple antenna ports and multiple beams, a base station device, and a user equipment; wherein, a method for initial access and random access based on multiple antenna ports and multiple beams includes: a base station The device sends a synchronization signal sequence to the user equipment on at least two base station beams with correlation; receives the preamble sequence sent by the user equipment on at least two base station beams with correlation; determines the base station beam with the largest energy based on the preamble sequence Direction and angle deviation of base station beam direction; adjust base station beam according to the maximum energy base station beam direction and base station beam direction angle deviation; send and receive data with user equipment through the adjusted base station beam. In the process of initial access, the present invention sends initial access data to user equipment on at least two correlated base station beams, which can determine the optimal beam direction of the base station side more quickly and reduce the collision probability.

Description

technical field [0001] The present invention relates to the field of mobile communications, and in particular, the present invention relates to a method for initial access and random access based on multiple antenna ports and multiple beams, base station equipment and user equipment. Background technique [0002] With the rapid development of the information industry, especially the growing demand from the mobile Internet and the Internet of Things (IoT), it brings unprecedented challenges to the future mobile communication technology. For example, according to the report ITU-R M.[IMT.BEYOND 2020.TRAFFIC] of the International Telecommunication Union ITU, it can be expected that by 2020, the growth of mobile traffic will increase by nearly 1000 times compared with 2010 (4G era), UE (User Equipment, The number of user equipment) connections will also exceed 17 billion. With the gradual penetration of massive IoT devices into mobile communication networks, the number of connect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0408H04W74/00H04W74/08
CPCH04B7/043H04W74/002H04W74/006H04W74/085H04W16/28H04W56/00H04W74/0833
Inventor 张英杰钱辰喻斌熊琦付景兴孙程君
Owner BEIJING SAMSUNG TELECOM R&D CENT
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