Random access method in wireless network and user equipment

A technology of random access and user equipment, applied in wireless communication, electrical components, synchronization devices, etc., can solve problems such as occupancy and consumption of system resource compatibility, large system bandwidth, etc., and achieve simple and reliable operation, small system bandwidth, and improved The effect of utilization

Active Publication Date: 2012-10-03
新奇点智能科技集团有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention provides a random access method and user equipment in a wireless network to solve the problems of existing solutions that occupy relatively large system bandwidth, consume too many system resources, and have poor compatibility

Method used

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  • Random access method in wireless network and user equipment
  • Random access method in wireless network and user equipment
  • Random access method in wireless network and user equipment

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] This solution is suitable for various large-area coverage scenarios, such as the scenarios covering the airspace of civil aircraft activities, the scenarios covering the sea area of ​​ships and drilling platforms, the scenarios covering the operation areas of maglev trains and high-speed railways, these scenarios are not covered by future networking missing part. These application scenarios belong to typical coverage-limited systems. For these scenarios, this solution proposes an implementable solution that meets the requirement of a coverage radius greater than 100km (for example, more than 200km).

[0030] see image 3 , which is a random access method in a wireless network provided in Embodiment 1 of the present invention, i...

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Abstract

The invention discloses a random access method in a wireless network and user equipment. The random access method comprises the following steps: obtaining an estimator of distance from UE (user equipment) to a base station; determining the random access time advance of the UE according to the estimator; when the random access is initiated, enabling the UE to send a random access preamble code to the base station according to determined time lead; and performing random access process. According to the scheme, the random access under a big-area coverage scene can be effectively realized, the operation is simple and reliable, small system bandwidth is occupied, and the resource use ratio is higher.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a random access method and user equipment in a wireless network. Background technique [0002] Random access plays an important role in wireless networks. It is the only strategy for users to restore uplink synchronization and uplink corresponding resource requests when they perform initial connection, handover, connection re-establishment, transition from idle mode to connected mode. After the user equipment (UE) initiates random access, it must first establish synchronization with the cell. When the UE accesses, due to the delay in space transmission, the preamble (Preamble) code sent by the UE for access arrives at the base station , there will be a certain propagation delay, such as figure 1 As shown, the random access preamble includes a cyclic prefix (CP), a preamble of an access preamble sequence, and a guard interval (GT). If the preamble received b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
CPCH04W56/0005H04W56/0045
Inventor 吴群英汝聪翀方晓波褚红发
Owner 新奇点智能科技集团有限公司
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