Plot switchover method based on multi-plot joint dispatching, device and system

Abstract

The invention discloses a plot switchover method based on multi-plot joint dispatching. In the method, when a source plot which a mobile station UE belongs to and a target plot which the UE moves to belong to the same multi-point joint transmission COMP dispatching set, a source plot base station administrating the source plot directly sends a wireless control reconfiguration request message to the UE and indicates the UE to re-configure network parameters and start switchover, wherein the plots contained by the COMP dispatching set maintain synchronous, so a random access process started by the UE for the synchronization with the target plot is eliminated, and the switchover process is simplified so as to shorten the execution time of the switchover process and the time of transmission stop caused by the switchover of the business; and simultaneously, RACH specialized resources needing to be occupied by switchover are greatly saved, and the waste of system resources is avoided. The invention also discloses a base station and a communication system.

Description

technical field [0001] The present application relates to a communication system, and in particular to a method, device and system for cell handover based on multi-cell joint scheduling. Background technique [0002] In the existing Long Term Evolution (LTE) system, due to the mobility of the mobile station (UE), when the UE moves between cells, the source cell base station ( Hereinafter referred to as the source cell ENB) will initiate a cell handover procedure, and its specific operation steps are as follows: [0003] Step 1: The source cell ENB sends a radio control reconfiguration request (RRC Connection Reconfiguration) message to the UE. [0004] In the RRC Connection ReconfigurationE message, it carries the radio resource configuration parameters, security parameters and mobility information that the UE needs to use in the target cell, and also carries the random access channel (Random Access Channel, RACH) resource information allocated to the UE , the RACH resourc...

AI Technical Summary

Problems solved by technology

At this time, the network side needs to allocate the dedicated preamble used for handover and the required PRACH resources to the UE. Before the UE completes the random access, the network side needs to maintain the assigned dedicated preamble and dedicated PRACH-maskindex for the UE. set of PRACH resources, and these resources cannot be used by other UEs, which will cause a waste of system resources to a certain extent

[0013] At present, in the LTE-A (upgraded LTE system) network that introduces COMP technology, when the UE performs handover between cells participating in the same COMP scheduling (abbreviated as COMP cell), it is executed by referring to the handover process of the existing LTE system. For related operations, due to the different specifications and standards applicable to the LTE system and the LTE-A system, the execution method of the handover process in the LTE system is not suitable for the LTE-A system, so a new cell handover method needs to be proposed to suit The operating environment of the LTE-A system to achieve the best results

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