Dynamic allocation of radio capacity in a TDMA system
First Claim
1. A method for dynamic division of radio capacity between packet radio service and circuit switched service in a TDMA system in which two-way traffic between base transceiver stations and mobile stations takes place in time slots on predetermined channels, characterized in that:
- in a basic mode a base transceiver station reserves a first predetermined number of time slots for packet radio service and a second predetermined number of time slots for circuit-switched service on said predetermined channels, and thaton the basis of a predetermined criterion, said base transceiver station allocates at least one additional time slot to one of the packet radio service and circuit switched service, said predetermined criterion comprising any one of the following;
a new packet radio connection is set up;
an existing packet radio connection is terminated;
a new packet radio session is set up;
an existing packet radio session is terminated;
a handover concerning a certain mobile station is performed; and
a certain threshold value is reached in a traffic measurement performed at said base transceiver station.
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Accused Products
Abstract
The invention relates to a method aiming at dynamic division of the radio capacity in a TDMA system dynamically between packet radio service and circuit switched service. According to the invention, some basic number of time slots are reserved for packet radio service and the rest are reserved for circuit switched service. When the traffic requirement of packet radio service increases, information regarding this is obtained by means of a request from a mobile station or through traffic measurement at the base transceiver station. This information is used as a criterion in allocating more time slots to packet radio service.
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Citations
20 Claims
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1. A method for dynamic division of radio capacity between packet radio service and circuit switched service in a TDMA system in which two-way traffic between base transceiver stations and mobile stations takes place in time slots on predetermined channels, characterized in that:
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in a basic mode a base transceiver station reserves a first predetermined number of time slots for packet radio service and a second predetermined number of time slots for circuit-switched service on said predetermined channels, and that on the basis of a predetermined criterion, said base transceiver station allocates at least one additional time slot to one of the packet radio service and circuit switched service, said predetermined criterion comprising any one of the following; a new packet radio connection is set up;
an existing packet radio connection is terminated;a new packet radio session is set up;
an existing packet radio session is terminated;a handover concerning a certain mobile station is performed; and a certain threshold value is reached in a traffic measurement performed at said base transceiver station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A time division multiple access (TDMA) mobile telecommunication system, which comprises a base station system (BSS), comprising base transceiver stations and base station controllers, and mobile stations, and in which two-way traffic between the base transceiver stations and the mobile stations takes place in time slots on predetermined channels, and in which mobile stations there is packet radio service and circuit switched service, characterized in that, for dynamic division of radio capacity between packet radio service and circuit switched service, said system comprises:
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means for causing, in the basic mode, the base station system (BSS) to reserve for packet radio service a predetermined first number of time slots, and for circuit switched service a predetermined second number of time slots, means, in the base station system (BSS), for monitoring the capacity required for each service, means for setting a predetermined criterion, said predetermined criterion comprising any one of the following; a new packet radio connection is set up; an existing packet radio connection is terminated; a new packet radio session is set up; an existing packet radio session is terminated; a handover concerning a certain mobile station is performed; and a certain threshold value is reached in a traffic measurement performed at said base transceiver station, and means for allocating to one of the packet radio service and circuit switched service, on the basis of said predetermined criterion, at least one additional time slot. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification