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Air interface synchronization method and device, communication network element

A technology of air interface synchronization and synchronization network, applied in the direction of synchronization devices, wireless communications, electrical components, etc., can solve problems such as unresolved solutions, network uplink and downlink cross-slot interference, etc., to achieve small impact, improve accuracy, and realize complexity low effect

Active Publication Date: 2019-06-25
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the 4G LTE commercial stage, different TD-LTE operators may jointly deploy their own TD-LTE networks in the same geographical area, and the TDD spectrum allocation of different operators may be adjacent frequency allocation (the same frequency allocation is not excluded) , if the TD-LTE networks between operators are not synchronized, it will lead to the uplink and downlink cross-slot interference between the networks of different TDD operators
[0005] For the above problems, there is currently no effective solution

Method used

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  • Air interface synchronization method and device, communication network element
  • Air interface synchronization method and device, communication network element
  • Air interface synchronization method and device, communication network element

Examples

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Embodiment 1

[0083] figure 2 It is a flow chart of the air interface synchronization method in Embodiment 1 of the present invention, such as figure 2 As shown, this example is a closed-loop air interface synchronous establishment scheme, and operator 1 does not need to configure the SIM card of operator 2, that is, authentication and authentication of operator 2 is not required.

[0084] Step 1: The base station to be synchronized of operator 1 works in the UE mode of operator 2 and performs air interface interception; the base station of operator 1 does not need to be configured with the SIM card of operator 2. The specific listening process is as follows:

[0085] The base station to be synchronized of operator 1 listens to the PSS / SSS / PBCH and other information of several base stations of operator 2, selects a base station with the strongest signal as the synchronization reference base station; and obtains initial frame synchronization (coarse synchronization);

[0086] The base st...

Embodiment 2

[0099] Closed-loop air interface synchronous establishment scheme, in this example, operator 1 needs to configure the SIM card of operator 2, that is, authentication and authentication of operator 2 is required.

[0100] Step 1: The base station to be synchronized of operator 1 works in the UE mode of operator 2 (configure the SIM card of operator 2), and conduct air interface interception;

[0101] The base station to be synchronized of operator 1 listens to broadcast information such as PSS / SSS / PBCH of several base stations of operator 2, selects a base station with the strongest signal as the synchronization reference base station; and obtains initial frame synchronization (coarse synchronization).

[0102] The base station to be synchronized of operator 1 listens to the SIB message of the reference synchronization base station of operator 2, and obtains the synchronization information of the synchronization reference base station of operator 2, as well as the configuration in...

Embodiment 3

[0114] The open-loop air interface synchronization establishment scheme does not compensate TA, and the base station to be synchronized of operator 1 does not need to be configured with the SIM card of operator 2. That is, during the synchronization process, the base station to be synchronized of operator 1 does not need authentication and authentication of operator 2.

[0115] Step 1: The base station to be synchronized of operator 1 works in the UE mode of operator 2, and performs air interface interception to complete the air interface synchronization establishment process:

[0116] The base station to be synchronized of operator 1 listens to broadcast information such as PSS / SSS / PBCH of several base stations of operator 2, selects a base station with the strongest signal as the synchronization reference base station; and obtains initial frame synchronization (only rough synchronization is obtained, no TA compensation, the accuracy of synchronization establishment may be wor...

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Abstract

The invention discloses an air interface synchronization method and device, and a communication network element; the method comprises the following steps: a to-be synchronized network element intercepts broadcasting messages and system messages of more than one network element of a different service provider, and carries out frame synchronization with a first network element of the more than one network elements; intercepting a system message of the first network element, and obtaining synchronization level and / or synchronization state information of the first network element; if the to-be synchronized network element needs the synchronization according to the synchronization level and / or synchronization state information of the first network element, synchronous operation with the first network element is started, so the to-be synchronized network element is synchronized with the first network element. Air interface synchronization cannot be completed according to an existing backhaul (S1signaling ) if the backhaul interface (link the S1) is omitted between different service providers; the air interface synchronization method and device can solve the said problems, and are high in synchronization precision.

Description

technical field [0001] The invention relates to base station synchronization technology between different operators, in particular to a method and device for air interface synchronization, and a communication network element. Background technique [0002] In order to suppress interference between base stations of Time Division Duplexing (TDD, Time Division Duplexing) operators, TDD base stations deployed on the same frequency need to perform inter-station time-frequency synchronization. There are currently three time-frequency synchronization schemes: (1) Synchronization based on Global Navigation Satellite System (GNSS, Global Positioning System) satellites, such as synchronization of Global Positioning System (GPS, Global Positioning System); (2) Synchronization based on ideal backhaul network , such as IEEE1588v2 synchronization; (3) air interface synchronization (radio-interface based synchronization mechanism). In typical application scenarios of Long Term Evolution (L...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
Inventor 刘建军童辉王飞柯颋郑毅沈晓冬
Owner CHINA MOBILE COMM GRP CO LTD