The main idea of proposed protocol was to schedule packet according to real contention status around the node and network congestion situation.

协议的主要思想是根据节点周围实际竞争状况和网络拥塞情况进行包调度。

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A second access mechanism is a centrally controlled one that USES a poll and response protocol to avoid collision and contention.

第二种是采用信包与响应协议的避免冲突与线路争用的中央访问机制。

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Key issues of contention remain, including how strictly the protocol's requirements will be applied, and the extent to which the planting of pollution-absorbing trees - so-called carbon sinks - can be used to meet targets.

BBC: EU pushes for Kyoto compromise

Another bone of contention is that the treaty excludes developing countries from having to abide by the protocol.

CNN: Climate change funding curb fought