Communication control system, communication control method, base station device and mobile terminal device

Abstract

In packet communications between a mobile terminal and a base station, the mobile terminal checks a priority level of a traffic and judges a type of the traffic, and transmits a reservation signal for a transmission request to the base station when the type of the traffic is a high priority level or realtime type, and does not transmits it when the type of the traffic is a low priority level or non-realtime type, while the base station determines a resource amount to be reserved for packet transmission according to a resource utilization state and the reservation signal for the traffic of the high priority level or realtime type, or an average transmission interval or transmission rate for the traffic of the low priority level or non-realtime type according to margins in remaining resources, and notifies the resource amount or the average transmission interval or transmission rate to the mobile terminal.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation Application of, and claims the benefit of priority under 35 U.S.C. §120 from, U.S. application Ser. No. 10 / 307,448, filed Dec. 2, 2002, herein incorporated by reference, which claims the benefit of priority under 35 U.S.C. §119 from Japanese Patent Application No. 2001-369078, filed Dec. 3, 2001.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a communication control system, a communication control method, a base station device and a mobile terminal device for carrying out packet communications between the base station device and the mobile terminal device.[0004]2. Description of the Related Art[0005]Conventionally, there are two types of the uplink resource control or traffic control method in the mobile packet communications including a resource reserving type method and a resource non-reserving type method.[0006]Exemplary techniques for this resource res...

AI Technical Summary

Benefits of technology

The present invention provides a communication control system and method for mobile communications that can efficiently allocate resources between real-time and non-realtime traffic. This is done by checking the priority level of traffic and transmitting a reservation signal to the base station for a transmission request. The base station then determines the resource amount to be reserved for packet transmission based on resource utilization and the reservation signal. The mobile terminal receives the notification information and prepares for the transmission. This invention allows for improved service quality and resource utilization.

Problems solved by technology

However, the above described resource reserving type method is associated with problems of low resource utilization efficiency including a problem that a reservation delay due to the resource reservation processing occurs for packets in small sizes and a problem that a control overhead becomes large as a rate of reservation signals becomes large.

Also, there are cases where the actually used resources are less than the reserved resources due to a variation in the amount of occurred traffics, and in such cases the resources are reserved wastefully so that the resource utilization efficiency is lowered.

Also, the above described resource non-reserving type method has a drawback that the QoS satisfaction level is lowered at the beginning of the burst in the realtime traffic as the quality degradation such as delay or interruption at a time of the start of the burst occurs due to the fact that the transmission of the initial packet is managed by the transmission permission establishing.

Also, when there is temporarily no transmission packet during a communication session, the reservation will be released so that there is a possibility of becoming impossible to make the reservation for some time due to a variation of the transmission permission establishing when a next burst occurs, and this situation tends to cause a forceful disconnection of the realtime communication so that it can potentially be a factor for the service quality degradation.

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