Method and system based on mobile prediction and group switching

Abstract

The invention discloses a group switch method based on a mobility prediction. Multi-service group user ends which move along fixed routes in a major public transportation system need to apply to a target base station for group switch according to detected changes of a wireless channel. The method further provides a mobility prediction based on location information, which comprises the following steps: the process of reselecting a target cell is simplified by using a mobile historical database; and the target cell is enabled to obtain relative information of all group users in advance through a backup backbone network. Required channel resources are reallocated through strategies such as borrowing channels, etc. Therefore, the system switch speed of the group user terminal is greatly improved, and QoS of broadband wireless communications in the switch process is guaranteed. The method further discloses a group switch system based on the mobility prediction, which mainly comprises a location information unit, a switch judging unit, a channel borrowing and resource allocating unit and a channel allocating unit.

Description

technical field [0001] The present invention relates to the field of broadband wireless communication, in particular to a group handover method and system based on movement prediction, which can be widely applied to group handover of multi-service group mobile users in large public transport vehicles. Background technique [0002] With the increasing technology of broadband wireless communication, future broadband mobile communication systems are expected to provide higher data transmission rates, wider signal coverage and support high-speed mobility. The traditional handover method usually uses each user terminal to continuously scan the quality of the wireless channel of the current serving base station. When the conditions required for communication cannot be maintained, the base station will be re-selected, and then switched to the adjacent base station with better signal strength. In the user-intensive urban environment, especially in the process of moving large-scale p...

AI Technical Summary

Problems solved by technology

[0003] Excessive signaling overhead during handover, handover delay, and data packet loss during handover lead to communication quality degradation and even call drop during handover;

[0004] The current handover strategy fails to quickly select the target base station by performing movement prediction according to the location movement information when the cinr (carrier-to-interference-to-noise ratio) drops sharply, which consumes a lot of time in the cell selection process;

[0005] For group mobile multi-user service connection handover, when disconnected from the original serving base station, the quality of service of each service cannot be completely maintained during the process of handover and re-entering the target base station. These problems may cause high-speed mobile terminal handover satisfaction decline

Images