| 摘要 |
<p>The invention concerns a method for measuring channel state information of multiple transmission/reception modes in a wireless network comprising a plurality of nodes, said modes being defined by frequency channels and/or antenna patterns, said wireless network comprising a MAC (Media Access Control) layer and every node comprising at least one MAC queue, comprising the steps of:periodically sending broadcast probe packets by at least one node called transmitter node (u), using a pre-determined and globally known period and predetermined sequence of transmission modes, each of said probe packets containing (i) the transmission mode used for its transmission (ii) a sequence number of the transmission mode in the pre-determined sequence of transmission modes and (iii) a timestamp value containing the time said broadcast probe packet was buffered at the MAC queue of the transmitter node (u);
measuring, by at least one second node called receiving node (v) receiving a broadcast probe packet , channel state information of a transmission/reception mode for the link between the transmitter node (u) and the receiving node (v);
storing, by said receiving node (v),said measured transmission/reception mode for said link;
using information contained in said received broadcast probe packet, by said receiving node (v), to determine (i) its reception mode and (ii) the beginning and end time instants it will use this reception mode, in order to receive a further broadcast probe packet and measure the next transmission mode of transmitter node (u), during a next measurement period of transmitter node (u).</p> |
