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Method and apparatus for synchronization signal transmission in wireless communication system

A synchronization signal and wireless communication network technology, applied in the field of transmission of synchronization signals, can solve problems such as the impact of radio resource utilization efficiency

Active Publication Date: 2018-10-26
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As another example, the efficiency of radio resource utilization by radio nodes may be affected by the traditional method of scanning beams to send synchronization signals

Method used

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  • Method and apparatus for synchronization signal transmission in wireless communication system
  • Method and apparatus for synchronization signal transmission in wireless communication system
  • Method and apparatus for synchronization signal transmission in wireless communication system

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Embodiment Construction

[0026] As a non-limiting example, figure 1 An embodiment of a wireless communication network 10 is shown, which is configured to use beamforming for synchronization signal transmission. The network 10 may be a wide area cellular radio network based on the Long Term Evolution (LTE) standard or based on another 3rd Generation Partnership Project (3GPP) standard, but is not limited thereto.

[0027] The network 10 includes one or more radio network nodes 12, and the radio network nodes 12 include base stations, access points, and the like. In the LTE context, the radio network node 12 is an eNB. As an example, three radio network nodes 12-1, 12-2 and 12-3 are shown. Each radio network node 12 provides radio services in the corresponding entire coverage area 14 (eg, "cell"). Although any given one or more radio network nodes 12 may provide more than one cell (eg, using different radio resources for each cell), the figure depicts each radio network node 12 as corresponding to a sing...

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PUM

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Abstract

In one aspect of the teachings herein, a radio network node advantageously adapts the transmission duration of a synchronization signal with respect to transmission of the synchronization signal in different directions. For example, the radio network node uses a shorter transmission duration in beam directions that are associated with better reception conditions and a longer transmission durationin beam directions that are associated with poorer reception conditions. As a consequence of varying the transmission duration according to received-signal qualities known or expected for the different directions, the radio network node can shorten the overall time needed to complete one synchronization-signal transmission cycle and use less energy, as compared to using a more conservative, longertransmission time in all beam directions.

Description

Technical field [0001] The present invention relates to wireless communication networks, and more specifically to the transmission of synchronization signals for use when connecting to such networks. Background technique [0002] Wireless communication devices configured to operate in a public land mobile network (PLMN), as well as certain other types of wireless communication systems, perform an initial access procedure after being powered on, or when reactivated after an extended sleep period. As the first step of the initial access process, the wireless communication device searches for and detects synchronization signals periodically broadcast by base stations or other access points in the network. [0003] The synchronization signal enables the wireless communication device to align with the network in frequency and time, based on the use of the synchronization signal from a given access point to determine the symbol boundary in the network transmission, thereby aligning the r...

Claims

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Application Information

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IPC IPC(8): H04B7/0491H04B1/7083H04B7/06H04B7/08H04J11/00H04L1/00H04W48/00H04W72/04
CPCH04B7/0491H04B7/0617H04B7/0626H04B7/0632H04B7/0695H04B7/088H04J11/0073H04J11/0076H04L1/0026H04W48/00H04W56/001H04W72/046H04W72/542H04B1/7083
Inventor 约翰·艾克斯纳斯艾格·摩科·古雷罗罗伯特·巴尔德麦尔丹尼斯.许艾利瑟里奥斯·卡里皮迪斯
Owner TELEFON AB LM ERICSSON (PUBL)