Clock synchronization method and device

A clock synchronization and clock technology, which is applied to synchronization devices, wireless communications, electrical components, etc., can solve the problems of uplink interference, large deviation of actual signal path delay measurement, and great influence, so as to reduce error accumulation, reduce The effect of uplink and downlink interference and improving clock synchronization accuracy

Active Publication Date: 2013-06-05
ZTE CORP
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Problems solved by technology

[0007] However, since HeNBs are generally deployed indoors and are greatly affected by buildings, the phenomena of wireless signal diffraction, reflection, and refraction are common, and they are often located at the edge of eNB coverage of macro base stations. In addition, HeNBs are often very cl

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  • Clock synchronization method and device

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Embodiment Construction

[0034] figure 2 Shown is a schematic diagram of deployment of HeNB and user equipment, where the radius of the cell covered by eNB A is relatively large, and the radius of the cells covered by HeNB B ~ HeNB F is small. Select some typical scenarios, where HeNB E is not covered by eNB A within the radius, but overlaps with HeNB C and HeNB D. Both HeNB C and HeNB D are located within the coverage radius of eNB A, and the coverage radii of HeNB C and HeNB D also overlap.

[0035] In order to solve the problem of uplink and downlink interference and improve clock synchronization accuracy, such as image 3 As shown, the air interface clock synchronization method in this embodiment includes:

[0036] Step 301: The base station that has completed clock synchronization confirms its own clock accuracy level and marks it;

[0037] A base station that has completed clock synchronization can save its own clock accuracy level to a network server, such as a gateway (GW) server.

[0038...

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Abstract

The invention discloses a clock synchronization method and a device, wherein the method and the device are applied to a micromicro base station (HeNB). The method and the device comprise that a standard base station is selected from adjacent base stations, a clock of the standard base station serves as a standard clock, a system clock is adjusted according to the standard clock; and clock precision level of the adjacent base stations are obtained, the signal strength and the path delay of time of the adjacent base stations are measured, weighing calculation is conducted on the path delay of time according to the signal strength and the clock precision levels of the adjacent base stations, and the system clock is adjusted according to the result of the weighing calculation. Due to the fact that two aspects of coarse adjustment and fine adjustment are conducted on the system clock, synchronization precision of the clocks of the micromicro base station is improved, descending and ascending interference between two adjacent micromicro base stations and between the micromicro base station and a macro station in the prior art is reduced, and accumulation of errors in the process of synchronization is reduced.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a clock synchronization method and device. Background technique [0002] LTE (Long Term Evolution, Long Term Evolution) is the next-generation mainstream mobile communication standard in the world after the third-generation mobile communication. rd Generation Partnership Project (3rd Generation Partnership Project) organization conducts feasibility research and standardization as a long-term evolution technology of the third generation of mobile communications. The research and standardization of LTE and its enhanced version LTE-Advanced are supported by global operators and equipment the broadest support and participation of the business community. The LTE system is based on Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMI) technologies, and fully adopts and optimizes packet data transmission in mobile communicatio...

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Application Information

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IPC IPC(8): H04W24/02H04W56/00
Inventor 王雪松张波唐雄王喜瑜梁敏超
Owner ZTE CORP
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