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Method and arrangement for base station synchronisation

A technology of indoor base station and outdoor base station, which is applied in the direction of synchronization device, electrical components, wireless communication, etc., to achieve the effect of improving the synchronization mechanism and saving hardware components

Inactive Publication Date: 2012-03-07
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The problem with existing solutions is that an indoor TDD base station requires a Global Positioning System (GPS) reference, which in turn requires an antenna outside the building
[0017] Installing GPS antennas and GPS receivers and expensive OCXOs for indoor base stations will bring additional costs to TDD base stations

Method used

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  • Method and arrangement for base station synchronisation
  • Method and arrangement for base station synchronisation
  • Method and arrangement for base station synchronisation

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Embodiment Construction

[0030] This solution is defined as a method and device in an indoor base station that can be implemented in the following embodiments. However, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully Express the scope of the program. It should be understood that there is no intent to limit the methods and apparatus to any particular form disclosed, but on the contrary, the methods and apparatus are intended to cover all modifications, equivalents falling within the scope of the invention as defined by the claims , and alternatives.

[0031] Of course, on the premise of not departing from the essential features of the present solution, the present solution may also be implemented in ways other than those explicitly described here. The present embodiment should be considered in every respe...

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PUM

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Abstract

Method, arrangement and computer program product in an indoor base station for synchronization of phase and frequency with an outdoor base station. The indoor base station and the outdoor base station are comprised within a wireless communication network and are adapted to send and receive data in radio frames. The indoor base station is adapted to alternatively operate in a first synchronization mode and in a second operative mode. The method comprises the steps of entering the first synchronization mode, sending a request for random access to the outdoor base station, receiving FPACH adjustment information from the outdoor base station, synchronizing the phase and frequency according to the received FPACH adjustment information and changing mode into the second operative mode.

Description

technical field [0001] The present invention relates to a method and a device in a wireless communication network, and more particularly, to a synchronization mechanism for an indoor time-division duplex base station. Background technique [0002] Time Division Duplex (TDD) in Wideband Code Division Multiple Access (WCDMA) and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) such as in 3rd Generation Partnership Project (3GPP) and TDD in Long Term Evolution (LTE) In technologies such as , base stations or (also called) NodeBs need to be synchronized with each other with a predefined frequency accuracy and phase accuracy. [0003] With TDD, uplink and downlink use the same frequency and cannot transmit at the same time. However, the uplink and downlink can share time in a flexible manner, and by allocating different amounts of time (e.g., the number of slots of a radio frame) to the uplink and downlink, the uplink and downlink can be accommodated. Asymmetr...

Claims

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Application Information

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IPC IPC(8): H04W56/00
CPCH04W56/0035H04W84/045
Inventor 苏又平张春辉
Owner TELEFON AB LM ERICSSON (PUBL)
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