Switching method and system

Abstract

The application discloses a switching method and system. The method comprises the following steps: triggering UE to switch to a target cell when a base station eNdeB judges that the user equipment UEof an authorized vehicle near-field communication function of a cell needs to perform the switching, and notifying the V2V sending resource of the UE useable in the switching process and the V2V sending resource useable after successful switching to the UE; in the execution process of the switching, transmitting V2V message through the V2V sending resource useable in the switching process by the UE; after the switching is successful, transmitting the V2V message through the V2V sending resource useable after successful switching by the UE. By using the switching method and system disclosed bythe invention, the switching success rate of the UE of the authorized near-field communication function can be improved, and the switching delay is reduced.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a switching method and system. Background technique [0002] Information exchange between vehicles and the outside world (Vehicle to X, V2X) is a key technology for future intelligent transportation systems. V2X was approved as a project at the 3GPP RAN#68 meeting, mainly researching the vehicle data transmission scheme based on the 3GPP communication protocol. Currently, V2X applications in existing reports include Vehicle-to-Vehicle (V2V), Vehicle-to-Infrastructure (V2I), Vehicle-to-Pedestrian (V2P) and car and application server (Vehicle-to-Network, V2N), such as figure 1 shown. V2X applications will improve driving safety, reduce congestion and vehicle energy consumption, improve traffic efficiency and in-vehicle entertainment information, etc. [0003] At present, Dedicated Short Range Communications (DSRC) is usually used to transmit V2X services, but its trans...

AI Technical Summary

Problems solved by technology

[0005] For the handover process in the existing 3GPP protocol, the target eNB cannot identify the UE type and know whether the UE is authorized to communicate with the vehicle in short distance

In this way, the target eNB cannot guarantee the access of the vehicle terminal / pedestrian terminal and assign it the PC5 port transmission pool used in the handover process

Especially in the case of heavy cell load, it is even more difficult to guarantee the access of vehicle terminals and pedestrian terminals under the same conditions, resulting in the introduction of additional delay in the handover process, which in turn increases the delay of V2X services

[0006] It can be seen that for UEs that have authorized the short-range communication function of the vehicle, the existing handover solutions will reduce the handover success rate, increase the handover delay, and affect the normal operation of V2X services.

Images