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Synchronization method of femtocell and macrocell and access method of user equipment

A technology for home base stations and macro base stations, which is applied in the field of interference coordination between home base stations and macro base stations, can solve problems such as cross-slot interference, and achieve the effect of avoiding interference and improving reception performance.

Active Publication Date: 2010-10-27
TD TECH COMM TECH LTD
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Problems solved by technology

Or, even if the uplink and downlink ratio of the HNB is the same as that of the macro base station, if the synchronization relationship between the HNB and the macro base station cannot be maintained, cross-slot interference will occur

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  • Synchronization method of femtocell and macrocell and access method of user equipment
  • Synchronization method of femtocell and macrocell and access method of user equipment
  • Synchronization method of femtocell and macrocell and access method of user equipment

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Embodiment Construction

[0023] In order to make the purpose, technical means and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] In order to avoid cross-slot interference, the present invention uses the macro base station as a benchmark to adjust the HNB synchronously, and by re-determining the start position of the uplink and downlink time slots of the HNB, it is ensured that the uplink and downlink time slots of the HNB and the macro base station do not overlap. In order to avoid cross-slot interference, ensure that the downlink of the macro base station will only interfere with the downlink reception of the UE of the HNB, and the downlink of the HNB will only interfere with the downlink reception of the UE of the macro base station; similarly, the uplink data of the UE of the HNB will only The uplink reception of the macro base station is interfered, and the uplink data of the UE of ...

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Abstract

The invention discloses a synchronization method of femtocell and macrocell. The method comprises the following steps: determining the propagation time delay TAB between femtocell and macrocell; calculating the difference of the guard period length of macrocell and the twice of the TAB, using the difference value as the guard period length of femtocell; and determining the TS0 initial position offemtocell to be the initial position postponement TAB relatively to the TS0 of macrocell, wherein a time slot which is the twice of TAB is between the uplink time slot and downlink time slot of femtocell. The invention also discloses an access method of the user equipment (UE). By using the synchronization method and access method of the invention, when the proportions of the uplink time slots and downlink time slots of femtocell and macrocell are the same respectively, the interference of cross slots can be avoided and the normal access of UE can be ensured.

Description

technical field [0001] The present invention relates to an interference coordination technology between a home base station and a macro base station, in particular to a synchronization method and a user equipment (UE) access method for the home base station and the macro base station. Background technique [0002] In order to solve the coverage problem of the macro base station, the concept of a home base station (HNB) with a small coverage area is proposed. Future TD-SCDMA home base stations and macro base stations will work together to achieve the purpose of enhancing the coverage and business enhancement of the TD system. [0003] In a system where the HNB and the macro base station coexist, if the HNB and the macro base station coexist on the same frequency or adjacent frequencies, the uplink and downlink time slots of the HNB and the macro base station are not aligned, and interference between cross time slots will occur, that is, the uplink time of the HNB The downlin...

Claims

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Application Information

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IPC IPC(8): H04W56/00
Inventor 王大飞范晨沈东栋
Owner TD TECH COMM TECH LTD
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