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Cyclic prefix identification method and eNodeB in long evolving system

A long-term evolution system and cyclic prefix technology, applied in eNodeB, cyclic prefix determination field, can solve problems such as waste of system resources, and achieve the effect of improving resource utilization efficiency

Active Publication Date: 2007-12-12
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0012] The present invention provides a method for determining a cyclic prefix in a long-term evolution system and an eNodeB, which are used to solve the problem in the prior art that a terminal within the coverage of a macro cell of an LTE system uses a single long cyclic prefix for data transmission, causing waste of system resources.

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  • Cyclic prefix identification method and eNodeB in long evolving system
  • Cyclic prefix identification method and eNodeB in long evolving system
  • Cyclic prefix identification method and eNodeB in long evolving system

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Embodiment Construction

[0047] In order to solve the above-mentioned problem that the terminals within the coverage of the macro cell in the prior art LTE system use a single long cyclic prefix to easily cause waste of system resources, the present invention proposes a method in which in the macro cell of the LTE system, according to the location of the UE, the resource Flexible configuration of long and short cyclic prefixes during allocation. Short cyclic prefixes are configured for UEs inside the cell, and long cyclic prefixes are configured for UEs on the edge of the cell. Compared with the single long cyclic prefix used in macro cells in the existing LTE system, the All users using the short cyclic prefix are located inside the cell, so the requirement of avoiding inter-symbol interference can be met, and the resource utilization efficiency of the system is improved.

[0048] The main realization principles, specific implementation methods and corresponding beneficial effects of the technical sol...

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Abstract

The invention discloses a circulated prefixion ensuring method and eNodeB in long-time changing system. Said method includes: A. eNodeB ensures terminal which needs to be attempered in the resource attempering unit time; B. eNodeB judges that whether the terminal is in area, if it is, short circled prefixion is adopted to send data or indicate terminal of this time upload data, if else, long circulated prefixion is adopted to send data to terminal, or indicate terminal of this time adopts long circulated prefixion to upload data. Said eNodeB includes resource distributing module, symbol sending module, attempering terminal ensuring module and judging module. The invention guarantees that terminal within range of area can receive signal normally, and resource utilization efficiency of system is increased further.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method for determining a cyclic prefix in a long-term evolution system and an eNodeB. Background technique [0002] The basic principle of OFDM (Orthogonal Frequency Division Multiplexing) technology is to divide a given channel into N orthogonal sub-channels in the frequency domain, each sub-channel is modulated with a sub-carrier, and the input The high-speed data stream is decomposed into N parallel low-speed data streams, which are simultaneously transmitted on N sub-channels. In this way, although the overall channel is non-flat and has frequency selectivity, each sub-channel is relatively flat, and the narrow-band transmission is carried out on each sub-channel, and the signal bandwidth is smaller than the corresponding bandwidth of the channel, so the gap between signal waveforms can be greatly eliminated. interference, which can effectively counter frequency selective...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L12/56H04L1/00
Inventor 毛磊
Owner DATANG MOBILE COMM EQUIP CO LTD
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