Method of seamless switching for mobile telephones in personal handheld telephone system

Abstract

This invention relates to a mobile seamless switching method in the individual hand telephone system, which is to define the marker of the mobile phone; when the base station receives the communication information, it establishes the request and judges whether the mobile phone is the seamless switching mobile phone, if the new base station has the spare interval, then first allotting the TCH interval that overlaps with CCH to it, if the TCH is be taken up, then dealing with it by the regular course. After establishing the call line with the seamless switching mobile phone on the new TCH, if the base station also has other spare interval, then switching the call to other spare interval and discharging the TCH interval. If the new base station hasn't spare interval, then it sends the reject information to the mobile phone, then the mobile phone searches other base station to establish the request. This invention can avoid the problem that using the seamless switching mobile phone of the single transceiver may result in the interval restricting when seamless switching, so it improves the success rate of seamless switching.

Description

Technical field: [0001] The present invention relates to the switching between base stations of a personal handy phone system (PHS: Personal Handy Phone System), more specifically, to the seamless switching technology of a mobile phone between base stations. Background technique: [0002] PHS technology is a micro-cellular technology, focusing on the application of mobile voice and data services under high traffic density and low moving speed. Compared with other mobile communication technologies such as GSM and CDMA, the coverage radius of PHS base stations is relatively small, resulting in a much higher handover probability of mobile phones in PHS systems than in traditional cellular communication systems. When a traditional PHS mobile phone switches in the PHS network, it first cuts off the original call, then re-searches the base station and re-establishes the connection on the base station with a stronger signal. The time for re-searching the base station and re-establi...

AI Technical Summary

Problems solved by technology

However, this solution is expensive due to the use of two sets of transceivers

[0007] The time slot limitation encountered in the second scheme is due to the fact that only one set of transceivers are used in the second scheme, which can only work serially in time

An example is as follows: the mobile phone uses the first pair of time slots to hold the call with the base station before the handover. When the call quality declines, the mobile phone can only use the second set of frequency synthesizers to perform the downlink CCH of the base station on the other three pairs of idle time slots ( Control Channel: Control Channel) signal search, the signal search cannot be performed on the first pair of time slots occupied by the mobile phone, so the base station search capability of the mobile phone is affected; in addition, when the base station randomly allocates the TCH (Traffic Channel: business channel ) time slot, it may be allocated to the first pair of time slots already occupied by the mobile phone. At this time, the mobile phone will not be able to re-establish the call on this time slot, which will affect the success rate and switching time of seamless handover to a certain extent.

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