Multi-mode mobile apparatus and method for calculating frame/time slot offsets, and allowing mobiles to synchronize with different mobile protocols/schemes
First Claim
1. In a communication system in which network infrastructure is operable to generate a synchronization signal pursuant to a first TDMA (time-division, multiple-access) communication scheme having a first time frame definition defined therein, and a mobile station operable pursuant to a second TDMA communication scheme having a second time frame definition defined therein, an improvement of apparatus for calculating a relative time offset by which to offset the synchronization signal, thereby to permit synchronizing of the mobile station to the synchronization signal, said apparatus comprising:
- a determiner coupled to receive the synchronization signal and operable responsive thereto, said determiner for determining an order number representative of a first-communication-scheme time frame located within a sequence of the first-communication-scheme time frame at a selected determining time;
a converter operable responsive to the order number determined by said determiner, said converter for converting the order number to a corresponding frame number of a second-communication-scheme time frame number; and
a timing offset calculator operable responsive to a value representative of the second-communication-scheme time frame number formed by said converter, said timing offset calculator for calculating a relative time offset between a current frame and time slot in the sequence of the first-communication-scheme time frames, the order number of which said determiner determines, and an allocated frame and time slot in the sequence of second communication-scheme time frames.
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Accused Products
Abstract
Apparatus, and an associated method, for a UWC-136 HS communication system is provided. A synchronization signal generated by the network infrastructure, constructed generally corresponding to the existing IS-136/136+ standard is received by a mobile station operable, generally, pursuant to the timing scheme defined in a GSM system. A relative timing offset between the timing schemes of the respective communication system schemes is determined and thereafter utilized for purposes of synchronization.
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Citations
22 Claims
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1. In a communication system in which network infrastructure is operable to generate a synchronization signal pursuant to a first TDMA (time-division, multiple-access) communication scheme having a first time frame definition defined therein, and a mobile station operable pursuant to a second TDMA communication scheme having a second time frame definition defined therein, an improvement of apparatus for calculating a relative time offset by which to offset the synchronization signal, thereby to permit synchronizing of the mobile station to the synchronization signal, said apparatus comprising:
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a determiner coupled to receive the synchronization signal and operable responsive thereto, said determiner for determining an order number representative of a first-communication-scheme time frame located within a sequence of the first-communication-scheme time frame at a selected determining time;
a converter operable responsive to the order number determined by said determiner, said converter for converting the order number to a corresponding frame number of a second-communication-scheme time frame number; and
a timing offset calculator operable responsive to a value representative of the second-communication-scheme time frame number formed by said converter, said timing offset calculator for calculating a relative time offset between a current frame and time slot in the sequence of the first-communication-scheme time frames, the order number of which said determiner determines, and an allocated frame and time slot in the sequence of second communication-scheme time frames. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for calculating a relative time offset by which to offset a synchronization signal generated at network infrastructure of a communication system, the network infrastructure operable pursuant to a first TDMA (time-division, multiple-access) communication scheme having a first time frame definition defined therein, the communication system further having a mobile station operable pursuant to a second TDMA communication scheme having second time frame definition defined therein, said method comprising:
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determining, responsive to the synchronization signal, an order number representative of a first-communication-scheme time frame located within a sequence of the first-communication-scheme time frames at a selected determining time;
converting the order number determined during said operation of determining to a corresponding frame number of a second-communication-scheme time frame number; and
using the determined first-communication scheme time frame number and converted second-communication scheme time frame number for calculating the relative time offset between the frame number and time slot of the first-communication scheme time frame sequence and communication scheme time frame sequence. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A multi-modemo bile station operable in a communication system in which network infrastructure is operable to generate a synchronization signal pursuant to a first TDMA (time-division, multiple-access) communication scheme having a first time frame definition defined therein, and the mobile station operable pursuant to a second TDMA communication scheme having a second time frame definition defined therein, an improvement of apparatus for calculating a relative time offset by which to offset the synchronization signal, thereby to permit synchronizing of the mobile station to the synchronization signal, said mobile station comprising:
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a determiner coupled to receive the synchronization signal and operable responsive thereto, said determiner for determining an order number representative of a first-communication-scheme time frame located within a sequence of the first-communication-scheme time frame at a selected determining time;
a converter operable responsive to the order number determined by said determiner, said converter for converting the order number to a corresponding frame number of a second-communication-scheme time frame number; and
a timing offset calculator operable responsive to a value representative of the second-communication-scheme time frame number formed by said converter, said timing offset calculator for calculating a relative time offset between a current frame and time slot in the sequence of the first-communication-scheme time frames, the order number of which said determiner determines, and an allocated frame and time slot in the sequence of second communication-scheme time frames.
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Specification