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Ultra-high-speed random access processing method, device and system

A technology of random access and processing methods, applied in the direction of code division multiplexing system, orthogonal multiplexing system, electrical components, etc., which can solve the problem of affecting network access performance and making it difficult to ensure normal access of UE to the network , It is difficult to guarantee the correctness of RTD and other issues, so as to achieve the effect of improving network access performance

Active Publication Date: 2016-12-07
HUAWEI TECH CO LTD
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Problems solved by technology

In the above two scenarios, the frequency offset of the random access signal is relatively large, as W ≥ 5, it is difficult for eNB to ensure the correctness of RTD detection under large frequency offset, so it is difficult to ensure the normal access of UE to the network, which affects the access performance of the network

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  • Ultra-high-speed random access processing method, device and system
  • Ultra-high-speed random access processing method, device and system
  • Ultra-high-speed random access processing method, device and system

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] Such as figure 1 As shown, an ultra-high-speed random access processing method provided by an embodiment of the present invention is specifically described as follows.

[0022] 101. Select a ZC sequence group according to the cell type and a first cyclic shift (cyclic shift) parameter Ncs, and set N detection windows for each ZC sequence in the ZC sequence group, where N≥5.

[0023] Wherein, the cell types include unrestricted cells and restricted cells, wh...

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Abstract

The invention discloses an ultra-high-speed random access processing method, device and system. The method includes: selecting a ZC sequence group according to the cell type and the first cyclic shift parameter Ncs, and providing each ZC sequence group in the ZC sequence group. The sequence sets N detection windows, N≥5; sends the cell type, the second Ncs and the ZC sequence group to the user equipment UE; receives the random access signal sent by the UE, and obtains the random access signal from the random access signal. Obtain the random access sequence; perform correlation processing on the random access sequence with each ZC sequence in the ZC sequence group, detect effective peaks in the N detection windows of each ZC sequence, and according to the The above-mentioned effective peak value determines the estimated value of the round-trip transmission delay RTD, which solves the problem of difficulty in correctly detecting the round-trip transmission delay in ultra-high-speed scenarios and improves network access performance.

Description

technical field [0001] The present invention relates to a mobile communication system, in particular to an ultra-high-speed random access processing method, device and system. Background technique [0002] In a Long Term Evolution (LTE) system, a Random Access Channel (Random Access Channel, RACH) is mainly used for initial access of a User Equipment (User Equipment, UE), and it does not carry any user data. The signal sent by the UE on the RACH channel is a preamble (Preamble) sequence, and the preamble sequence is a Zadoff-Chu sequence (Zadoff-Chu sequence, ZC sequence). In the prior art, Preamble can include a length T CP Cyclic Prefix (CP) and a length of T SEQ The access sequence (Sequence, SEQ) has two parts. At the same time, for the parameter settings of Preamble in several different formats, different cell radii can be matched, as shown in Table 1: [0003] Table 1 [0004] [0005] Among them, T s is the basic time unit in the LTE protocol, T s =1 / (15000×...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/00H04W74/08
CPCH04J13/0062H04W74/002H04J13/16H04W74/0833H04W74/0838H04J2011/0096H04W74/006
Inventor 万莉
Owner HUAWEI TECH CO LTD
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