Method of time-slot allocation in a TDMA communication system
First Claim
1. A method of time-slot allocation for a communication in a time division multiple access (TDMA) communication system which allocates one time-slot for a low transmission speed communication and a plurality of time-slots for a high transmission communication in a TDMA frame, said method comprising the steps of:
- detecting a request for a new communication;
examining whether there exist any high transmission speed communications currently communicating in the TDMA communication system, if the number of idle time-slot required for the new communication are not available;
if there exists at least one high transmission speed communication currently communicating in the TDMA communication system, selecting one of the high transmission speed communications, and instructing a mobile terminal involved in the selected high transmission speed communication to suspend communication due to time-slot reallocation;
releasing at least one time-slot from a plurality of time-slots in the selected high transmission speed communication;
notifying the mobile terminal to resume communication with a reduced number of time-slots without using the at least one time-slot; and
allocating the at least one released time-slot to the new communication requested.
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Accused Products
Abstract
An efficient method of time-slot allocation for a communication in a time division multiple access (TDMA) communication system which allocates one or more time-slots in a TDMA frame is provided. When new call request occurs, availability of idle time-slot for the communication is examined. If there is not enough idle time-slot to be allocated for the new call, it is examined whether there is high transmission speed communication using a plurality of time-slots. When any of the high transmission speed communications exist, time-slots are shared by newly requested communication and the high transmission speed communication using a maximum number of time-slots among the high transmission speed communications. Transmission speed adjustment is performed for such high transmission speed communications sharing a part of time-slot. The probability of occurence of call loss is decreased by this method.
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Citations
10 Claims
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1. A method of time-slot allocation for a communication in a time division multiple access (TDMA) communication system which allocates one time-slot for a low transmission speed communication and a plurality of time-slots for a high transmission communication in a TDMA frame, said method comprising the steps of:
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detecting a request for a new communication; examining whether there exist any high transmission speed communications currently communicating in the TDMA communication system, if the number of idle time-slot required for the new communication are not available; if there exists at least one high transmission speed communication currently communicating in the TDMA communication system, selecting one of the high transmission speed communications, and instructing a mobile terminal involved in the selected high transmission speed communication to suspend communication due to time-slot reallocation; releasing at least one time-slot from a plurality of time-slots in the selected high transmission speed communication; notifying the mobile terminal to resume communication with a reduced number of time-slots without using the at least one time-slot; and allocating the at least one released time-slot to the new communication requested. - View Dependent Claims (2, 3, 4, 5)
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6. A method of time-slot allocation for a communication in a time-division multiple access (TDMA) communication system which allocates one time-slot for a low transmission speed communication and a plurality of time-slots for a high-speed transmission speed communication in a TDMA frame, said method comprising the steps of:
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detecting a request for new communication; examining whether there are a sufficient number of idle time-slots currently available for the new communication; selecting one of high transmission speed communication currently communicating in the TDMA communication system with a maximum allowable number of time-slots in one TDMA frame, and instructing a mobile terminal involved in the selected high transmission speed communication to suspend communication due to time-slot reallocation; releasing at least one time-slot from the maximum allowable number of time-slots in the selected high transmission speed communication; performing transmission speed adjustment for the selected high transmission speed communication, the adjustment depending on the number of time-slots being released, informing the mobile terminal to resume communication with a reduced number of time-slots for the selected high transmission speed communication, the reduced number of time-slots not including the released time-slots; and allocating at least one released time-slot from the selected high transmission speed communication to the new communication requested. - View Dependent Claims (7, 8, 9)
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10. A method of time-slot allocation for a communication in a time-division multiple access (TDMA) communication system which allocates one time-slot for a low transmission speed communication and a plurality of time-slots for a high-speed transmission speed communication in a TDMA frame, said method comprising the steps of:
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detecting any of idle time-slots becoming available due to completion of communication in the TDMA communication system; finding a high transmission speed communication performing transmission speed adjustment with an insufficient number of time-slots in a carrier with no more idle time-slot available; finding a different carrier having sufficient idle time-slots becoming available for use of a plurality of time-slots of said high transmission speed communication being found; and reallocating complete time-slots of said high transmission speed communication to the different carrier for allowing the high transmission speed communication to use a sufficient number of time-slots.
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Specification