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A joint handover method for lte-v2x system

An LTE-V2X, UE1-UE2 technology, applied in the field of handover, can solve the problems of easy interruption of SL links, low quality of cellular links and SL links, etc., to ensure stability, reduce network signaling overhead, and be difficult to interrupt. Effect

Active Publication Date: 2021-02-02
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0008] In view of this, the purpose of the present invention is to provide a joint handover method for the LTE-V2X system, which is used to solve the problem that the quality of the cellular link and the SL link is not high during the handover process of the vehicle user and that the SL link is easily damaged during the SL assisted handover process. interrupt problem

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  • A joint handover method for lte-v2x system
  • A joint handover method for lte-v2x system
  • A joint handover method for lte-v2x system

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Embodiment Construction

[0040] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] The invention relates to a handover scheme in an LTE-V2X system, and discloses a handover method applied to a vehicle-mounted user. The present invention combines the SL assisted handover scheme with the LTE handover scheme to achieve the purpose of optimizing the easy interruption of the SL link during the SL assisted handover process and improving the link quality during the handover process of the vehicle user, thereby improving the vehicle-mounted performance in the LTE-V2X system. User switching performance. First, the moving direction of the vehicle user is included in the handover decision condition. When the UE meets the conditions for triggering cellular handover, the mobile direction of the UE is judged. Only when the mobile direction of the UE is far away from the base station can the handover be triggered, which can redu...

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Abstract

The invention relates to a combined handover method for an LTE-V2X system, belonging to the field of mobile communications. The method includes the following steps: S1: the vehicle user UE1 is initially connected to the source base station; S2: when the UE1 moves to an area that meets the trigger cell handover condition, the source base station judges the moving direction reported by the UE1; S3: when the UE1 meets the steps When the judgment condition in S2 is met, UE1 screens other nearby vehicle users to form a joint handover SL user pair; S4: If there is a joint handover SL user pair UE1-UE2 that meets step S3, trigger joint handover; otherwise, UE1 executes Individual handover; S5: joint handover SL user performs joint handover process on UE1‑UE2; S6: joint handover is completed. The invention ensures the stability of the SL link in the joint switching process, reduces network signaling overhead, and realizes seamless switching.

Description

technical field [0001] The invention belongs to the field of mobile communication, and relates to a switching method in an LTE-V2X system. Background technique [0002] With the rapid development of mobile communications and the rapid growth of network-connected devices and traffic, 5G networks will be deployed more dynamically and intensively to meet the needs of fast data rates, low latency, and high reliability in a large number of device scenarios. Compared with LTE, the overall goal of 5G is to increase the amount of mobile data per region by 1000 times, the number of connected devices by 10-100 times, and reduce the end-to-end delay by 5 times. Vehicle users have fast mobility. As the network is more densely deployed, the switching frequency of vehicle users will further increase during the movement process. Traditional LTE handover strategies based on signal strength cannot well meet the handover requirements of V2X (Vehicle to Everything, Vehicle to Everything) comm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/40H04W36/18H04W36/32
CPCH04W36/18H04W36/32H04W4/40
Inventor 申滨周晓勇徐浪黄晓舸
Owner CHONGQING UNIV OF POSTS & TELECOMM