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Low latency synchronization scheme for wrieless ofdma systems

An Orthogonal Frequency Division Multiple Access and Orthogonal Frequency Division technology, applied in multi-frequency code systems, synchronization devices, transmission systems, etc., can solve problems such as reducing network latency

Active Publication Date: 2011-04-13
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Designing a hierarchical SCH structure that can reduce network latency and / or provide the desired trade-off between network entry latency and robustness of cell ID detection remains a challenge

Method used

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  • Low latency synchronization scheme for wrieless ofdma systems
  • Low latency synchronization scheme for wrieless ofdma systems
  • Low latency synchronization scheme for wrieless ofdma systems

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Experimental program
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Embodiment Construction

[0015] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0016] figure 1 is a schematic diagram of a cellular OFDMA system 10 with hierarchical DL synchronization according to an embodiment of the present invention. Cellular OFDMA system 10 includes BS 11 and MS 12 , MS 13 and MS 14 . The BS 11 includes a radio frequency (radio frequency, hereinafter referred to as RF) transmitter / receiver module 15, an SCH allocation module 16, a processor 17, a storage device 18, and an antenna 19, wherein the antenna 19 is coupled to the RF transmitter / receiver module 15. After turning on the power, MS 12, MS 13, and MS 14 receive radio signals broadcast from BS 11. DL PHY layer synchronization is required before MS 12, MS 13 and MS 14 can access BS 11 and communicate data. MS 12, MS 13 and MS 14 adjust timing, frequency and power by SCH monitor and trace during DL synchronization.

[0017] In the example of cellular ...

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Abstract

The invention relates to a down link synchronization scheme for cellular wireless OFDMA system and a base station. In advanced wireless OFDMA communication systems, hierarchical synchronization is adopted to synchronize between a base station and a mobile station. In a hierarchical synchronization architecture, primary advanced preamble is used for coarse time domain synchronization while cell ID is detected using several accumulated secondary advanced preambles. Network entry latency can be reduced by adjusting the relative location of superframe header, PA-Preamble and SA-Preambles within a superframe. Three different synchronization channel architectures are proposed to provide different tradeoffs between network entry latency and the robustness of SA-Preamble design and cell ID detection.

Description

[0001] cross reference [0002] This application claims the following priority according to 35 U.S.C. §119: No. 61 / 163,934, filing date is 2009 / 3 / 27, and the U.S. provisional application titled "Synchronous scheme for advanced wireless OFDMA communication systems". The subject matter of which is hereby incorporated by reference. technical field [0003] The present invention relates to a cellular Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, hereinafter referred to as OFDM) system, in particular to an advanced wireless Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Multiple Access, hereinafter referred to as OFDMA) Low-latency network synchronization of a base station (base station, hereinafter referred to as BS) in a communication system. Background technique [0004] In a wireless communication system, such as a wireless communication system defined by the Institute of Electrical and Electronics Engi...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L5/0053H04W56/00H04L27/2602H04L27/2656
Inventor 张育豪廖培凯
Owner MEDIATEK INC