Exact(2)
The ED willing to give the alarm overhears the beacon message (even if intended for another ED) to acquire synchronization, it randomly chooses one of the 64 mini-slots, and it uses carrier sensing before any transmission attempt to avoid cross-tier interference from external devices operating on the same frequencies (e.g., WiFi and Bluetooth).
Anyway, the problem was that they claimed these CBs were operating on the same frequencies as pacemakers, emergency services, hospital equipment and so on.
Similar(58)
Indeed, there is a fundamental flaw to the idea of using signal strength, and that is the fact that it is impossible to distinguish the strength of one signal to another if they are all operating on the same frequency.
Interferences from other wireless systems operating on the same frequency band might also be present.
The interference effects are modeled as multiple narrowband signals operating on the same frequency band as the desired signal.
According to the IEEE 802.11 standard, the multiple access to the communication medium is based on the contention between the different nodes operating on the same frequency channel.
In a HetNet environment, MUEs near HeNBs suffer from high interference because eNBs and HeNBs are operating on the same frequency bands.
It is intuitive that D2D communications under 3GPP mode-1 category shall result in severe interference if CUEs and DUEs are operating on the same frequency band.
In MR-MC WMNs, the interference among transmissions operating on the same frequency channel is alleviated by using multiple radios on each mesh node and by assigning different channels to each radio, thus enabling more concurrent transmissions, compared with the single radio single channel WMNs.
Opponents of the plan, including preachers and entertainers, say such devices could interfere with broadcast channels on nearby spectrum and with wireless microphones, which are used in live performances and operate on the same frequencies.
The study compares the revenues from two possible spectrum schemes for femtocell deployment; the split spectrum scheme, where femtocells and macrocells operate on different frequencies and do not interfere, and the common spectrum scheme, where they operate on the same frequencies (partially or fully) and interfere.
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