| The blocking problems of radio channels in GSM mobile communication system have badly restricted service expansion for mobile service provider due to the increasing subscriber number, the reducing network construction investments, and the advancing customers requirements for quality of service (QoS). The effect by use of single means to handle blocking problems of radio channels in GSM mobile communication systems is not in evidence under the actual communication environment. It is the corporate responsibility for mobile telecommunication services operators and telecommunication equipments provider to improve the mobile communication systems by means of adopting the combining technological strategies, and to evaluate the advantage of such combining technological strategies.An optimal engineering was put in practice in the GSM mobile network of Guiyang City from second half of 2003 to the end of 2004. During the period, many projects for optimizing the radio channels, such as antenna adjusting, cell selecting, etc. ware brought in effect. After so doing, the performances of radio channels are greatly improved, and the valuable technological specifications and engineering methods, which can be use for reference to optimize the similar mobile system, ware summarized.In this dissertation, the reasons of bringing the block in some radio channels, such as TCH and SDCCH, are analyzed in detail in order to obtain the effective methods for improving the performances of the blocked radio channels. Firstly, the radio waves diffusing and the mobile networks planning are present. Then, the engineering optimizing methods with the combination of adjusting antenna and configuring the cell parameter for handling the blocking problems in radio channels are roundly analyzed. The validity after adopting the Dual Frequency Network Structure adjusting technologies, the new half rate speech technologies, and the carrier poor technologies are also discussed in this dissertation.
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