Channel Allocation using Power Controlled CTS in Multi-hop Networks

As wireless networks evolve, the spatial reuse is becoming an important issue because it heavily affects overall system throughput. Concerned with the IEEE 802.11 standard, media access control (MAC) schemes have been researched actively for obtaining high throughput by increasing spatial reuse. In this paper, we propose a power controlled clear-to-send (CTS) scheme that aims at increasing spatial reuse while using the fixed power for data transmission. Other competitive schemes mainly control the data transmission power, but our scheme controls the transmission power for CTS message which level is determined to cover the receiver's interference range. The spatial reuse incense in proposed scheme which reduces the occupied area of each communication pair, thereby improving overall throughput performance. We perform the comparison work through mathematical analysis. The results show that our scheme improves throughput performance.