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Base station and method for preventing random access conflicts

A random access and random access response technology, applied in electrical components, wireless communication, etc., can solve problems such as system throughput decline, increase access delay, and deteriorate user experience, so as to increase contributions, alleviate negative effects, Effect of Improving Spectrum Utilization Efficiency

Active Publication Date: 2012-02-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of the system, the spectral efficiency is reduced, which will lead to a decrease in system throughput; from the perspective of a single user, the access delay is increased and the user experience is deteriorated.

Method used

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  • Base station and method for preventing random access conflicts
  • Base station and method for preventing random access conflicts
  • Base station and method for preventing random access conflicts

Examples

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Embodiment Construction

[0026] Below, refer to the attached Figure 1~5 The base station and method for preventing random access conflicts of the present invention are described in detail.

[0027] Such as image 3 As shown, the method for preventing random access conflicts of the present invention includes the following steps:

[0028] Step 101: the eNB saves the received aliased preamble sequences sent by each user.

[0029] Step 102: The eNB selects a correlation peak position that exceeds the threshold; for example, the eNB detects the first correlation peak position that exceeds the threshold in the aliased preamble sequence.

[0030] Step 103: According to the correlation peak position, the eNB considers that the correlation peak position corresponds to the preamble sequence of a certain user, sends a random access response authorization for the preamble sequence, and authorizes the user.

[0031] Step 104: The eNB performs offline collision correlation detection: For a certain preamble sequ...

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PUM

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Abstract

The invention provides a base station (eNB) and a method for remitting random access conflicts, wherein the method comprises the steps that: when the transmission of a message 3 has an error, the eNB analyzes according to the offline conflict detection result of a leader sequence; if the message 3 has the error due to too strong interference, the eNB notifies a user to give up the retransmission of the message 3, and user equipment (UE) re-launches random access; and if the transmission of the message 3 has the error due to channel fading or noise mutation, the user is notified to continue to retransmit the message 3. By using the eNB and the method provided by the invention, the negative effect of conflicts during a random access process to a system and the user can be mitigated, so that the random access time of the user is reduced.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a base station and method for preventing random access conflicts. Background technique [0002] In the current long-term evolution (Long-Term Evolution, LTE) Release 8 protocol, when the base station (Ehanced NodeB, eNB) detects the preamble (preamble) sent by the user, for a certain preamble sequence, the eNB performs correlation detection in the window . If the correlation peak within the detection window exceeds a certain threshold, it is considered that there is a user using the preamble sequence for random access. However, in actual scenarios, there may be multiple users sending the same preamble on the same resource block (Resource Block) at the same time, such as figure 1 shown. In this way, the eNB can theoretically detect multiple correlation peaks within the window of the preamble sequence. However, in the current implementation, due to the limitation of hardwa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04W88/08
CPCH04W74/0841
Inventor 褚丽莉娄笃仕赵刚
Owner ZTE CORP