Method and apparatus for changing carrier frequencies in each time slot in a telecommunications process
AssigneeNokia Mobile Phones Ltd.
InventorAndreas Schobl
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Abstract
The invention relates to a telecommunications process with time division multiple access (TDMA) between a first and a second station, in which process one station transmits and the other receives in at least one predetermined time slot of a frame. In this process, the carrier frequency is changed over in this time slot (Z3) from frame (R1) to frame (R2), in order, in this way, to be able to set up a plurality of transmission channels, using only one time slot. This changing over of the carrier frequency is terminated given fulfilment of an abort criterion.
Claims14
Telecommunications process with time division multiple access (TDMA) between a first and a second station, in which process one station transmits and the other receives in at least one predetermined time slot of a frame in a sequence of said frames, the process comprising steps of:
- communicating via said sequence of frames between said first and said second stations at a first of a plurality of carrier frequencies during a first frame, a second frame and each of a succession of further frames of said sequence pursuant to a condition of communication;
- observing said condition of communication;
- upon occurrence of a change in said condition of communication, changing a carrier frequency in said time slot from a first carrier frequency in said first frame (R1) to a second carrier frequency in said second frame (R2) for use of differing values of carrier frequency in successive ones of said frames;
- and
- terminating said changing of the carrier frequency upon fulfillment of an abort criterion.
Telecommunications process with time division multiple access (TDMA) between a first and a second station, in which process one station transmits and the other receives in at least one predetermined time slot of a frame in a sequence of said frames, the process comprising steps of:
- communicating via the sequence of frames between said first station and said second station at a first of a plurality of carrier frequencies during a first frame, a second frame and each of a succession of further frames of said sequence pursuant to a condition of communication, said condition being an availability of a desired number of communication channels or of a desired signal quality;
- observing said condition of communication;
- upon occurrence of a change in said condition of communication, wherein said change is an increase in said desired number of communication channels or a decrease is said signal quality, changing the carrier frequency in said second frame from said first carrier frequency to a second of said plurality of carrier frequencies, and providing that said first and said second carrier frequencies are used alternately in successive ones of said frames;
- and
- restoring one of said first and said second carrier frequencies in each of said frames of said sequence in response to fulfillment of an abort criterion.
Telecommunications process with time division multiple access (TDMA) between a first station and a second station, in which process one of said stations transmits and the other of said stations receives in at least one predetermined time slot of a frame in a sequence of said frames, the process comprising steps of:
- communicating via said sequence of frames between said first station and said second station with a first of a plurality of carrier frequencies during a first frame, a second frame, and each of a succession of further frames of said sequence pursuant to a condition of communication;
- observing said condition of communication;
- upon occurrence of a change in said condition of communication, changing the carrier frequency in said second frame from a value of the first carrier frequency used in said first frame to a second of said plurality of carrier frequencies, and using said first and said second carrier frequencies alternately in successive ones of said frames;
- and
- restoring one of said first and said second carrier frequencies for use in each of said frames of said sequence upon fulfillment of an abort criterion.
Dependencies are inferred from the claim text.