Transmitting a signal
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.
1 . 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.
2 . The method of claim 1 , comprising detecting at least one further signal within the first frequency range, each of the at least one further signal having a respective bandwidth that is smaller than the first channel bandwidth, and wherein determining a first threshold for LBT based on a bandwidth of the second signal comprises determining the first threshold based on a sum or maximum of the bandwidth of the second signal and the respective bandwidth of the at least one further signal.
3 . The method of claim 1 , comprising determining a signal power of signals within the first frequency range and outside of the second frequency range, wherein transmitting the first signal is responsive to the signal power of signals within the first frequency range and outside of the second frequency range being below or equal to a further threshold being lower than the first threshold.
4 . The method of claim 3 , wherein determining the signal power of signals within the first frequency range and outside of the second frequency range comprises sensing the signal power of signals within the first frequency range, and subtracting the signal power of the second signal.
5 . The method of claim 4 , wherein sensing the signal power of signals within the first frequency range is performed as part of a LBT procedure.
6 . The method of claim 1 , comprising:
selecting a modulation and coding scheme (MCS) for transmission of the first signal based on the bandwidth of the second signal; and/or
selecting a frequency interleaving distance for physical resource blocks (PRBs) used for transmission of the first signal, wherein the frequency interleaving distance is equal to or greater than the bandwidth of the second signal.
7 . The method of claim 1 , comprising refraining from transmitting the first signal if the signal power of signals within the first frequency range is above the first threshold.
8 . The method of claim 1 , wherein transmitting the first signal within the first frequency range comprises attenuating or preventing transmission within the second frequency range.
9 . The method of claim 8 , wherein attenuating or preventing transmission within the second frequency range comprises one of the followings:
attenuating one or more subcarriers within the second frequency range;
refraining from transmitting on subcarriers within the second frequency range;
attenuating one or more Resource Units (RUs) that at least partially overlap with the second frequency range;
refraining from transmitting using one or more Resource Units (RUs) that at least partially overlap with the second frequency range.
10 . The method of claim 9 , wherein the first threshold is determined based further on a capability to perform attenuating or preventing transmission within the second frequency range.
11 . The method of claim 10 , wherein the first threshold is increased based on the capability to perform attenuating or preventing transmission within the second frequency range.
12 . The method of claim 1 , comprising sensing the signal power of signals within the first frequency range before transmitting the first signal.
13 . The method of claim 12 , wherein sensing the signal power of signals within the first frequency range is performed as part of a LBT procedure.
14 . The method of claim 1 , wherein:
the first signal comprises a Wi-Fi signal; and/or
the second signal comprises a frequency hopping signal or Bluetooth signal.
15 . The method of claim 1 , comprising determining or estimating the bandwidth of the second signal.
16 . The method of claim 1 , further comprising:
obtaining user data; and
forwarding the user data to a host or a terminal device.
17 . A non-transitory computer-readable medium comprising, stored thereupon, a computer program product comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out a method according to claim 1 .
18 . 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.
19 . 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.
20 . The method of claim 19 , wherein determining the signal power of signals within the first frequency range and outside of the second frequency range comprises sensing the signal power of signals within the first frequency range, and subtracting the signal power of the second signal.