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Random access method for broadband trunking communication system

A random access and communication system technology, applied in wireless communication, electrical components, etc., can solve the problems of unable to receive Msg2 normally, unable to complete the random access process, unable to know the sending subband of MSG2, etc.

Active Publication Date: 2014-03-26
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This change makes the existing LTE random access process not directly applicable, otherwise the UE in the single subband working mode cannot know the sending subband of MSG2, that is, it cannot receive Msg2 normally, which will cause the UE to fail to complete the random access process

Method used

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  • Random access method for broadband trunking communication system
  • Random access method for broadband trunking communication system
  • Random access method for broadband trunking communication system

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] The method provided by the invention can be as figure 2 As shown, it mainly includes the following steps:

[0039] Step 201: UE selects PRACH resource to send random access Preamble code to eNB.

[0040] The Preamble code used by the UE is known. Since there is only one Preamble code in the entire network, in order to avoid interference from neighboring cells, the Preamble sequence in a cell uses the same cyclic shift. If the eNB detects other cyclic shifts in the cell Preamble code, it can be judged as the interference signal of the adjacent cell. The shift index in the Preamble code indicates the cyclic shift information of the Preamble code, which is obtained by the UE through a broadcast message during the cell search process. That ...

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Abstract

The invention provides a random access method for a broadband trunking communication system, which is specific to user equipment (UE) supporting a single subband working mode. The method comprises the following steps that: the UE transmits a random access preamble code, directly skips to an ordinary subband mapped by a physical random access channel (PRACH) resource where the transmitted random access preamble code is positioned, and monitors a random access response; and an evolved Node B (eNB) receives the random access preamble code transmitted by the UE, and transmits a random access response to the UE on the ordinary subband mapped by the PRACH resource where the transmitted random access Preamble code is positioned. According to the method, the UE supporting the single subband working mode can normally complete a random access process by using the mapping relation between the PRACH resource where the random access preamble code is positioned and the ordinary subband where the random access response is positioned.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a random access method in a broadband trunking communication system. Background technique [0002] In the broadband trunking communication system, the available bandwidth of the system is divided into a plurality of continuous or discontinuous sub-bands, and each sub-band is transmitted using Orthogonal Frequency Division Multiplexing (OFDM) technology. Each subband is generally divided into a synchronous subband and a normal subband according to functions. Synchronous subbands are used for uplink and downlink synchronization and broadcast channels. The uplink special time slot (UpPTS) and uplink subframes in the synchronization subband can be used as physical random access channel (PRACH) resources, allowing users to perform random access on PRACH resources. access. Common subbands are used for normal traffic transmission. [0003] Random access technology is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08
Inventor 周欣韦玮
Owner POTEVIO INFORMATION TECH CO LTD