A first node and a method therein
A node and node-type technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve problems such as retransmission and data loss, and achieve the effects of reducing the impact of interference, improving utilization, and improving performance
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[0035] As part of the examples developed in this article, some issues will first be identified and discussed.
[0036] As mentioned earlier, in WLAN, clear channel assessment (CCA) thresholds are specified to limit that WLAN nodes (such as access points (AP) or stations (STA)) will listen to the transmissions of other WLAN devices to avoid transmission conflicts (such as Avoid interference).
[0037] CCA should perform three tasks. The first is to avoid collisions, such as avoiding sending to nodes that are already sending or receiving data. The second is to ensure that an acceptable signal to interference plus noise ratio (SINR) is used to receive the expected transmission. The third is that the ongoing transmission should be protected.
[0038] From a performance point of view, using a threshold (e.g., a CCA threshold) based on, for example, received power is not optimal, because even if the transmission may be successful and is unlikely to interfere with other ongoing transmiss...
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