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US 6,665,289 B1Granted
Wireless telecommunications system employing dynamic multislot class
AssigneeNokia Corporation
InventorsBenoist Sebire, Jari Vallstrom
Life of this patent
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Abstract
A method is disclosed for operating a wireless TDMA communications system. The method includes steps of monitoring a propagation delay of a mobile station; and when the propagation delay exceeds a predetermined limit, changing by a time slot unit a value of one or both of Tta1 and Ttb1, wherein Tta1 is a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot, when a channel measurement is to be performed in between, and wherein Ttb1 is a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot.
Claims22
A method to operate a wireless TDMA communications system, comprising:
- a propagation delay of a mobile station to detect an occurrence of a condition that the propagation delay exceeds a predetermined limit;
- and
- in response to detecting that the propagation delay exceeds the predetermined limit, selecting parameters to increase the number of time slots dynamically for varying, by a predetermined amount, a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot, when a channel measurement is to be performed in between, and for varying a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot.
A method to operate a wireless TDMA communications system, comprising:
- monitoring at a base station controller a propagation delay of a mobile station to detect an occurrence of a condition that the propagation delay exceeds a predetermined limit;
- and
- in response to detecting that the propagation delay exceeds the predetermined limit, selecting parameters to increase the number of time slots dynamically for changing by a time slot unit a value of one or both of Tta1 and Ttb1, wherein Tta1 is a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot, when a measurement is to be performed in between, and wherein Ttb1 is a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot.
A wireless TDMA communications system, comprising:
- a base transceiver station (BTS);
- a base station subsystem (BSS) coupled to said BTS;
- and
- at least one mobile station comprising a transceiver for operating within a coverage area of said BTS;
- said BSS comprising a data processor for executing a dynamic multislot class algorithm by monitoring a propagation delay of the mobile station to detect an occurrence of a condition that the propagation delay exceeds a predetermined limit and, in response to detecting that the propagation delay exceeds the predetermined limit, for selecting parameters to increase the number of time slots dynamically for varying by a predetermined amount a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot, when a measurement is to be performed in between, and a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot.
2 more elements
A method executed by a TDMA base station sub-system (BSS) to derive timing parameters for a mobile station, comprising:
- monitoring a propagation delay of the mobile station to detect an occurrence of a condition that the propagation delay exceeds a predetermined limit;
- in response to detecting that the propagation delay exceeds the predetermined limit, selecting parameters to increase the number of time slots dynamically comprising increasing by one time slot a value of Tta1 and Ttb1, where Tta1 is a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot, when a channel measurement is to be performed in between, and where Ttb1 is a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot, while maintaining a value of Tta2, which is a minimum number of time slots that are allowed between the end of a previous transmit time slot and a next transmit time slot, when a channel measurement is to be performed in between, and a value of Ttb2, which is a minimum number of time slots that are allowed between the end of the last, previous transmit time slot and the first, next transmit time slot;
- and
- transmitting at least the values of Tta1 and Ttb1 to the mobile station for storage in the mobile station.
1 more element
A method to operate a wireless TDMA communications system, comprising steps of monitoring at a base station (30) a propagation delay of a mobile station and changing a time slot allocation, comprising:
- changing the time slot allocation comprises at least partially redefining definitions of parameters Tta and Ttb for said mobile station, where Tta specifies a minimum number of time slots that are allowed between the end of a previous transmit time slot or a previous receive time slot and a next transmit time slot, when a channel measurement is to be performed by the mobile station in between, and where Ttb specifies a minimum number of time slots that are allowed between the end of a last receive time slot and a first, next transmit time slot, or between a previous transmit time slot and a next transmit time slot when the frequency is changed in between, said definitions being redefined such that,
- Tta is comprised of two parameters namely:
- Tta1, which specifies the minimum number of time slots that are allowed between the end of the previous receive time slot and the next transmit time slot, when a channel measurement is to be performed by the mobile station in between, and Tta2, which specifies the minimum number of time slots that are allowed between the end of the previous transmit time slot and the next transmit time slot, when a channel measurement is to be performed by the mobile station in between;
- and such that Ttb is comprised of two parameters namely:
- Ttb1, which specifies the minimum number of time slots that are allowed between the end of the previous receive time slot and the next transmit time slot;
- and Ttb2 which specifies the minimum number of time slots that are allowed between the end of the previous transmit time slot and the next transmit time slot;
- the step of redefining further comprising changing by a time slot unit a value of one or both of Tta1 and Ttb1.
4 more elements
A wireless TDMA communications system, comprising a mobile station and a base station comprising means for monitoring a propagation delay of said mobile station and for changing a time slot allocation, further comprising:
- said means is responsive to the propagation delay exceeding a predetermined limit for at least partially redefining definitions of parameters Tta and Ttb for said mobile station, where Tta specifies a minimum number of time slots that are allowed between the end of a previous transmit time slot or a previous receive time slot and a next transmit time slot, when a channel measurement is to be performed by the mobile station in between, and where Ttb specifies a minimum number of time slots that are allowed between the end of a last receive time slot and a first, next transmit time slot, or between a previous transmit time slot and a next transmit time slot when the frequency is changed in between, said definitions being redefined such that,
- Tta is comprised of two parameters namely:
- Tta1, which specifies the minimum number of time slots that are allowed between the end of the previous receive time slot and the next transmit time slot, when a channel measurement is to be performed by the mobile station in between, and Tta2, which specifies the minimum number of time slots that are allowed between the end of the previous transmit time slot and the next transmit time slot, when a channel measurement is to be performed by the mobile station in between;
- and such that Ttb is comprised of two parameters namely:
- Ttb1, which specifies the minimum number of time slots that are allowed between the end of the previous receive time slot and the next transmit time slot;
- and Ttb2 which specifies the minimum number of time slots that are allowed between the end of the previous transmit time slot and the next transmit time slot;
- said means changing by a time slot unit a value of one or both of Tta1 and Ttb1.
4 more elements
Dependencies are inferred from the claim text.