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Random access method, base station and user equipment

A random access and physical random access technology, applied in the field of communications, can solve problems such as reduced UE access success rate and UE access failure.

Active Publication Date: 2017-07-07
CHINA MOBILE GROUP JIANGSU
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a random access method, base station, and user equipment to solve the problem that when co-channel interference is encountered, the existing PRACH preamble sequence format causes UE access failure, and the UE access success rate of the entire communication system is reduced

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  • Random access method, base station and user equipment
  • Random access method, base station and user equipment
  • Random access method, base station and user equipment

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] Various aspects are described herein in connection with UEs and / or base stations. UE refers to a device (device) that provides voice and / or data connectivity to a user, including a wireless UE or a wired UE. The wireless UE may be a handheld device with a wireless connection function, or other processing device connected to a wireless modem, a mobile UE that communicates with one or more core networks via a radio access network. Fo...

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Abstract

Disclosed are a random access method, a base station and user equipment. The method comprises: judging, by a base station, whether same-frequency interference exists currently; if yes, sending, by the base station, a system message carrying an interference preamble sequence format to user equipment (UE) subordinate to the base station, the interference preamble sequence format being used for indicating that time domain resources occupied by a physical random access channel (PRACH) of the UE are an ith symbol to an (i+n)th symbol of at least first uplink subframe of each half-frame in a radio frame, and receiving, by the base station, a preamble for random access sent by the UE on the time domain resources indicated by the interference preamble sequence format; and if the base station correctly demodulates the preamble, sending a random access response to the UE. The problems that UE access fails and the UE access success rate of the whole communication system is reduced due to an existing PRACH preamble sequence format during same-frequency interference are solved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a random access method, base station and user equipment. Background technique [0002] Modern mobile communications tend to provide high-speed multimedia services. In the LTE (Long Term Evolution, Long Term Evolution) system, PRACH (Physical Random Access Channel, Physical Random Access Channel) is an uplink random access channel. UE ( After User Equipment (User Equipment) receives the FPACH (Fast Physical Access Channel, Fast Physical Access Channel) response message, it will send an RRC (Radio Resource Control, Radio Resource Control Protocol) message on the PRACH channel according to the information indicated by the base station, and perform RRC connection of establishment. [0003] In the 3GPP R8 (Third Generation Partnership Project) specification, when the LTE system configures the uplink PRACH channel, a variety of Preamble formats (preamble formats) are designed for LTE...

Claims

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Application Information

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IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/006H04W74/0866
Inventor 郑英卞国东胡铭洁仇勇张强姜琦戴彬吴晶
Owner CHINA MOBILE GROUP JIANGSU
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