Transmitting a signal
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsLeif Wilhelmsson, Narendar Madhavan, Christian Bergljung, David Sugirtharaj
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Abstract
Examples of this disclosure include a method of transmitting a first signal in a first frequency range. The method comprises detecting a second signal in a second frequency range within the first frequency range, wherein the second frequency range is smaller than the first frequency range, and determining a first threshold based on a bandwidth of the second signal. If a signal power of signals within the first frequency range is below or equal to the first threshold, transmitting the first signal within the first frequency range.
Claims20
A method of transmitting a first signal in a first frequency range having a first channel bandwidth, the method comprising:
- detecting a second signal in a second frequency range within the first frequency range, wherein the second frequency range has a second channel bandwidth, and the second channel bandwidth is smaller than the first channel bandwidth;
- determining a first threshold for listen before talk (LBT), based on a bandwidth of the second signal;
- and
- responsive to a signal power of signals within the first frequency range being below or equal to the first threshold, transmitting the first signal within the first frequency range;
- wherein the first threshold is a function of a ratio of the bandwidth of the second signal to the first channel bandwidth of the first frequency range or is proportional to the ratio of the bandwidth of the second signal to the first channel bandwidth of the first frequency range.
Apparatus for transmitting a first signal in a first frequency range having a first channel bandwidth, the apparatus comprising a processor and a memory, the memory containing instructions executable by the processor such that the apparatus is operable to:
- detect a second signal in a second frequency range within the first frequency range, wherein the second frequency range has a second channel bandwidth, and the second channel bandwidth is smaller than the first channel bandwidth;
- determine a first threshold for listen before talk (LBT), based on a bandwidth of the second signal;
- and
- responsive to a signal power of signals within the first frequency range being below or equal to the first threshold, transmit the first signal within the first frequency range;
- wherein the first threshold is a function of a ratio of the bandwidth of the second signal to the first channel bandwidth of the first frequency range or is proportional to the ratio of the bandwidth of the second signal to the first channel bandwidth of the first frequency range.
A method of determining whether to transmit a first signal in a first frequency range having a first channel bandwidth, the method comprising:
- detecting a second signal in a second frequency range within the first frequency range, wherein the second frequency range has a second channel bandwidth, and the second channel bandwidth is smaller than the first channel bandwidth;
- determining a first threshold for listen before talk (LBT), based on a bandwidth of the second signal;
- determining a signal power of signals within the first frequency range and outside of the second frequency range;
- and
- determining whether to transmit the first signal within the first frequency range, based on whether the signal power of signals within the first frequency range being below or equal to the first threshold;
- and
- refraining from transmitting the first signal if the signal power of signals within the first frequency range and outside of the second frequency range is above a further threshold, the further threshold being lower than the first threshold;
- wherein the first threshold is a function of a ratio of the bandwidth of the second signal to the first channel bandwidth of the first frequency range or is proportional to the ratio of the bandwidth of the second signal to the first channel bandwidth of the first frequency range.
Dependencies are inferred from the claim text.