In multihop wireless networks, hidden terminal problem is common and leads to collision which makes it difficult to provide the required quality for multimedia services or support priority-based services. Existing approaches to this problem either sacrifice throughput noticeably or require additional transceivers and channels. In this paper, we propose a new scheme in which a sender inserts a few dummy bits in the data frame and its intended receiver transmits short busy advertisements over the

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... same channel to clear the floor for receiving. It only requires a single transceiver and a single channel. The performance analysis shows that the new scheme has a much higher efficiency than the existing approaches using a single channel and a single transceiver.