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Subcarrier spacing identification

A technology of subcarrier spacing and carrier, applied in modulation carrier system, modulation type identification, digital transmission system, etc., can solve problems such as increasing cell search time and increasing complexity

Active Publication Date: 2010-01-27
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, here the UE will be required to be able to implement both sync signal designs, in which case it can either run the search algorithm on both sync signals in parallel, adding complexity, or run the search on both sync signals sequentially algorithm, thereby increasing the cell search time

Method used

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Embodiment Construction

[0028] The various features of the invention will now be described with reference to the drawings, in which like parts are identified with the same reference numerals.

[0029]Various aspects of the invention will be described in more detail in connection with a number of exemplary embodiments. To facilitate understanding of the invention, aspects of the invention will be described in terms of sequences of actions performed by elements of a computer system or other hardware capable of executing programmed instructions. It should be appreciated that in each of the embodiments, the various acts can be implemented by dedicated circuitry (e.g., discrete logic gates interconnected to perform specialized functions), by program instructions executed by one or more processors, or a combination of both. to execute. Furthermore, the invention is also considered fully embodied in any form of computer readable carrier, eg, solid state memory, magnetic disks, optical disks containing an a...

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Abstract

A cellular communications system that utilizes OFDM in its radio interface is capable of utilizing either a first subcarrier spacing or a second subcarrier spacing. Which of these is presently in use is indicated by generating a first type of synchronization signal in response to the first subcarrier spacing presently being in use, and generating a second type of synchronization signal in response to the second subcarrier spacing presently being in use. Whichever of the first type of synchronization signal and the second type of synchronization signal was generated is transmitted. To distinguish between the first and second types of synchronization signals, a time domain representation of the second type of synchronization signal includes a plurality of instances of the first type of synchronization signal.

Description

technical field [0001] The present invention relates to subcarrier spacing in mobile communication systems using Orthogonal Frequency Division Multiplexing (OFDM), and in particular to enabling user equipment operating in the system to detect which of a number of possible subcarrier spacings is currently Technology used for communication. Background technique [0002] In the upcoming evolution of mobile cellular standards such as Global System for Mobile Communications (GSM) and Wideband Code Division Multiple Access (WCDMA), new transmission techniques such as OFDM are likely to occur. Additionally, for a smooth migration from an existing cellular system to a new high-capacity high-data-rate system in the existing radio spectrum, the new system must be able to operate in a dynamically variable bandwidth. One proposal for such a new flexible cellular system is 3G Long Term Evolution (3G LTE, where "3G" means "third generation"), which can be seen as an evolution of the 3G W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L27/00
CPCH04L27/0008H04L27/2626H04L27/2613H04L27/2655H04L27/0012H04L27/26025H04L27/26H04L27/2666
Inventor B·林多夫R·巴尔德梅尔S·帕克瓦尔E·达尔曼
Owner TELEFON AB LM ERICSSON (PUBL)
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