Asymmetric seamless switching method for large and small base stations in broadband wireless multimedia system

Abstract

The invention provides an asymmetric seamless switching method for large and small base stations and is applicable to the large and small base station mode of a broadband wireless multimedia system. Cells of a plurality of small cell base stations are simultaneously in the service coverage of a large broadcast base station; when the point-to-multipoint mode of large broadcast base station fails to assure the required service quality of a broadcast service, the large broadcast base station needs to be seamlessly switched to the small station of the cells so as to provide the broadcasting service in a point-to-point mode; once that the service quality of broadcasting service provided by the large base station for the user in the point-to-point mode restores to be normal is monitored, the small base station is switched to the large station immediately; and the continuity of service quality of broadcasting service can be guaranteed, and the use ratio of wireless resources can be improved. The seamless switching method provided by the invention is an asymmetric switching method. The large broadcast base station is switched to the small cell base station by a pretrigger method with switching delay taken into consideration, and the switch from the small cell base station to the large broadcast base station is judged according to the switch threshold of service quality of the broadcasting service. By taking the influence of switching delay and ping-pong effect into comprehensive consideration, the system resource utilization rate of large and small base station mode can be optimized under the condition of meeting the service quality requirements of broadcasting service.

Description

technical field [0001] The invention belongs to the field of wireless communication, and provides a method for seamless switching between large and small base stations in a broadband wireless multimedia system. The method is based on the mode of large and small base stations, belongs to asymmetric seamless switching, and can guarantee broadcasting service The continuity of quality improves the utilization rate of wireless resources. The method is suitable for large and small base station mode broadband wireless multimedia systems with large base station edge areas or center blind areas. Background technique [0002] With the increasing demand for broadband wireless multimedia services, people hope that wireless networks can provide higher data rates and better service quality, which puts forward higher requirements for wireless communication systems, but the spectrum resources available for wireless communication systems are Limited, so it is necessary to improve the spectr...

AI Technical Summary

Problems solved by technology

Existing wireless handover methods are all suitable for symmetric handover between small base stations with the same coverage and point-to-point mode. The same handover judgment method is used between different base stations, without consideration of those with different coverage and Changes in broadcast service quality of service and system resource utilization caused by switching between large base stations in point-to-multipoint broadcast

At present, no research has given an asymmetric method for seamless handover between large and small base stations in the large and small base station mode, and this kind of handover decision method is used between large and small base stations to ensure the seamlessness of the continuity of broadcast service quality The research on the switching method is still blank at home and abroad

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