A hard switching method in wireless communication

Abstract

This invention provides a hard-switch method, which judges quality of the current wireless links according to the measurement report of UE combining with two hard-switching strategies in current technology and applies a related hard-switch mode accordingly, in which, if it judges that the quality is good, then it changes the resource in an original area then to carry out hard-switch without changing resources, if it judges that the quality of the current network is poor, it carries out hard-switch along with the change of resources for avoiding service interruption resulted by network interruption.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a hard handover method when the resource of the destination side is insufficient in the wireless communication. Background technique [0002] In the Universal Mobile Telecommunications System (UMTS), the resources of the target cell need to be allocated during hard handover. At this time, there are two situations of sufficient resources of the target cell and insufficient resources of the target cell. [0003] When the resources of the target cell are sufficient to meet the current service requirements, the physical channel reconfiguration process can be used on the air interface to directly implement hard handover. [0004] When the resources of the target cell are insufficient to meet the current service requirements, for services that support deceleration processing, such as non-real-time (NRT) services and services that can be decelerated in the radio access bearer (RAB)...

AI Technical Summary

Problems solved by technology

[0031] 1) Poor switchback performance

Since the rates before and after the handover are different, and the current transmission format combination set does not consider the issue of rate compatibility, the handover must be performed at a specified time, that is, layer 1 or layer 2 of the UE and layer 2 of the access network layer (UTRAN) ( L2) switch to the new configuration at the same time

[0032] 2) The switching of L2 is complicated

[0033] 3) It is very difficult for the RNC to achieve dual broadcast during internal handover

When switching with resource changes, RNC needs to perform dual broadcast while maintaining two sets of transmission channel configurations, and the processing method is complicated

[0034] To sum up, in the case of insufficient resources in the destination cell, for services that support deceleration processing, if the step-by-step method of decelerating first and then hard handover is adopted, the implementation is simple and the switchback performance is good, but the handover time is longer , when the signal quality of the source cell deteriorates rapidly, the connection may be disconnected due to untimely handover; if the hard handover method accompanied by speed reduction is adopted, the handover is rapid and the disconnection can be avoided when the network quality is poor, but it is difficult to implement and the Cut performance is poor

It can be seen that no matter which of the above-mentioned existing hard handover methods is adopted, it is impossible to adapt to changes in network conditions while ensuring handover quality

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