Method for determining zero correlation section length set, apparatus and mobile communication system thereof

Abstract

The invention provides a method for determining the length set of the zero correlation zone, which includes: determining the length of the root sequence; selecting a zero correlation zone length set, for any sub-district radius, the maximum number of the lead determined by one zero correlation zone length selected from the selected zero correlation zone length set is mostly adjacent to the maximum number of the lead determined by any one zero correlation zone length selected from the set of all integers, wherein the maximum number of the lead is determined by the length of the root sequence and the length of the selected zero correlation zone. The invention provides also an apparatus, base station and mobile communication system for determining the length set of the zero correlation zone. In the invention, the selected ZCZ length finite set should conform to a definite condition, thereby providing a technical scheme of selecting a comparatively good ZCZ length finite set, and decreasing the signaling spending.

Description

technical field [0001] The present invention relates to the random access preamble technology in the mobile communication system, in particular to the technology for determining the length set of the zero-correlation zone. Background technique [0002] In a mobile communication system, generally, a mobile terminal sends a random access preamble (Random Access Preamble) to a base station to initialize a random access procedure and realize synchronization with the base station. [0003] In "3GPP TS 36.211 v1.0.0-Physical Channels and Modulation (Physical Channels and Modulation)" published in March 2007, it has been determined that each cell has 64 preambles. When the mobile terminal initializes the random access procedure, the mobile terminal needs to send one of the 64 preambles. Alternatively, the mobile terminal can transmit a message to the base station by selecting a specific preamble. [0004] Before sending the preamble, the mobile terminal must first complete carrie...

AI Technical Summary

Problems solved by technology

[0018] At present, the 3GPP Tdoc "R1-071661-On construction and signaling of RACH preambles" published in March 2007 proposes to use the signal to cyclically shift the incremental value N CS The mobile terminal is notified, but the value of the cyclic shift increment is not limited, so a relatively large amount of signaling overhead is caused

The 3GPP Tdoc "R1-07 1471-Outstanding issues inrandom access preamble design for E-UTRA" published in March 2007 gives another relative solution, that is, using 11 values ​​of N CS collection, but does not specify how to choose these values

Therefore, there is currently no feasible solution for selecting a finite set of better ZCZ lengths to ensure a smaller and limited signaling overhead

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