Wireless rate adaptation
View Patent ↗A method of adapting wireless transmission rates that includes the steps of determining at least a short-term loss ratio for wireless communication during a window of time, and adapting a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window. A size of the window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication. Preferably, the window is re-started if the transmission rate changes. Also, systems, devices, and memories that embody the foregoing.
1. A method, including steps of
determining at least a short-term loss ratio for wireless communication during a window of time;
adapting a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window; and
using RTS/CTS messages during an RTS/CTS window;
wherein a size of the window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication, and a size of the RTS/CTS window is measured in frames;
wherein the RTS/CTS window is increased in size if successful communication does not occur in a frame when the RTS/CTS messages are not being used.
2. A method, including steps of
determining at least a short-term loss ratio for wireless communication during a window of time;
adapting a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window; and
using RTS/CTS messages during an RTS/CTS window;
wherein a size of the window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication, and a size of the RTS/CTS window is measured in frames;
wherein the RTS/CTS window is halved in size if successful communication does not occur in a frame when the RTS/CTS messages are being used, or if successful communication does occur when the RTS/CTS messages are not being used.
3. A method, including steps of
determining at least a short-term loss ratio for wireless communication during a window of time;
adapting a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window; and
using RTS/CTS messages during an RTS/CTS window;
wherein a size of the window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication, and a size of the RTS/CTS window is measured in frames;
wherein the RTS/CTS window stays a same size if successful communication does occur when the RTS/CTS messages are being used.
4. A method, including steps of
determining at least a short-term loss ratio for wireless communication during a window of time;
adapting a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window; and
using RTS/CTS messages during an RTS/CTS window;
wherein a size of the window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication, and a size of the RTS/CTS window is measured in frames;
wherein determination of the short-term loss ratio does not count frames that have the RTS/CTS messages and that fail to be communicated.
5. A system including
a loss estimation module that determines at least a short-term loss ratio for wireless communication during a window of time;
a rate change module that adapts a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window; and
an adaptive RTS/CTS filter that uses RTS/CTS messages during an RTS/CTS window;
wherein a size of the small window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication and the RTS/CTS window is measured in frames;
wherein the RTS/CTS window is increased in size if successful communication does not occur in a frame when the RTS/CTS messages are not being used.
6. A system including
a loss estimation module that determines at least a short-term loss ratio for wireless communication during a window of time;
a rate change module that adapts a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window; and
an adaptive RTS/CTS filter that uses RTS/CTS messages during an RTS/CTS window;
wherein a size of the small window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication and the RTS/CTS window is measured in frames;
wherein the RTS/CTS window is halved in size if successful communication does not occur in a frame when the RTS/CTS messages are being used, or if successful communication does occur when the RTS/CTS messages are not being used.
7. A system including
a loss estimation module that determines at least a short-term loss ratio for wireless communication during a window of time;
a rate change module that adapts a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window; and
an adaptive RTS/CTS filter that uses RTS/CTS messages during an RTS/CTS window;
wherein a size of the small window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication and the RTS/CTS window is measured in frames;
wherein the RTS/CTS window stays a same size if successful communication does occur when the RTS/CTS messages are being used.
8. A system including
a loss estimation module that determines at least a short-term loss ratio for wireless communication during a window of time;
a rate change module that adapts a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window; and
an adaptive RTS/CTS filter that uses RTS/CTS messages during an RTS/CTS window;
wherein a size of the small window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication and the RTS/CTS window is measured in frames;
wherein determination of the short-term loss ratio does not count frames that have the RTS/CTS messages and that fail to be communicated.