Switchover control method

A control method and handover instruction technology, applied in the field of communication, can solve the problems of long handover interruption time, affecting the performance of wireless communication system, etc., and achieve the effect of reducing interruption time and avoiding redundant waste of wireless resources.

Inactive Publication Date: 2007-10-03
SHENZHEN TINNO MOBILE TECH CO LTD
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Problems solved by technology

[0023] In the hard handover process of the existing LTE system, the interruption time of the hard handover increases linearly with the increase of the synchronization access time delay between the UE and the target eNB, and if the synchronization process between the UE and the target eNB fails, the UE needs to re-pass The synchronization process restores the wireless link connection with the source eNB, which makes the handover interruption time too long, thus seriously affecting the performance of the wireless communication system

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Embodiment Construction

[0051] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0052] The idea of ​​the handover control method of the present invention is that during the handover process, the user equipment does not cut off the connection with the source base station while the user equipment searches for the synchronization sequence of the target base station, and after the user equipment synchronizes with the target base station, the user equipment Before the base station establishes a connection, the user equipment cuts off the connection with the source base station.

[0053] Fig. 3 is a flowchart of the first handover control method according to the present invention. As shown in Figure 3, the first handover control method according to the present invention includes the following steps:

[0054] Step S302: After receiving the handover request of the user equipment, the target base station determines that the user equipment can access. ...

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Abstract

The invention provides a wide range of switching control methods, in which, one of the switching control method includes the following steps: Step S302, the target base station determines to access to the user-equipment and sends switching instructions to referred user-equipment when receiving request for switching from user-equipment. Step S304, when the user-equipment receives the request for switching, without cutting off the source of the wireless link connecting of source base station, the user-equipment launches the same synchronizing establishing process with the target base station, and the source base station transmits the transmitting user-data to the target base station. Step S306, the user-equipment cuts off the connection with the source base station after their synchronous access process, the user-equipment sends the transmitted correct serial number to the target base station. Step S308, the target base station determines the starting position of data transmission the user-equipment. Step S310, the user-equipment and the target base station establish connection and communication.

Description

Technical field [0001] The present invention relates to the field of communication, and in particular to a handover control method used in a communication network. Background technique [0002] The 3GPP (Third Generation Partnership Project) LTE (Long Term Evolution) project is the largest new technology research and development project launched by 3GPP in the past two years. Because of the physical layer technology of the air interface, the downlink transmission uses advanced and mature orthogonal frequency division multiplexing. With (OFDM) technology, the uplink transmission method is determined to be single carrier frequency division multiplexing (SC-FDMA) with low peak-to-average ratio, which has obvious advantages such as high spectral efficiency, high downlink transmission rate, and small transmission delay. [0003] The access network architecture in LTE is shown in Figure 1. E-UTRAN (Evolved UMTS Radio Access Network) is composed of eNB (Evolved Node B), and U-plane for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04L12/56H04W36/02H04W36/08H04W36/34
Inventor 刘晟曹华
Owner SHENZHEN TINNO MOBILE TECH CO LTD
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