Method for operating a wireless network and a wireless network
View Patent ↗For allowing a best possible usage of network resources even under congestion conditions a method for operating a wireless network, especially an IP (Internet Protocol) network, is described, wherein a queue management function based on an average queue length in a network element is used. The method is characterized in that a result of a weighting function will be combined or multiplied with the average queue length for determining a combined congestion contribution for use within the queue management function, wherein the weighting function takes into account per-user information on a wireless channel condition. Further, a corresponding wireless network, preferably for carrying out the above mentioned method, is also described.
1. A method for operating a wireless network using a queue management function based on an average queue length in a network element, wherein:
a result of a weighting function is combined or multiplied with the average queue length for determining a combined congestion contribution for use within the queue management function;
the weighting function is taking into account per-user information on a wireless channel condition, and said weighting function is based on a current MCS (Modulation Coding Scheme; and
the weighting function multiplies a marking or dropping probability calculated from the average queue length with an index that is based on the current MCS of a user, to generate said result.
2. The method according to claim 1 , wherein the per-user information comprises resource usage and/or transmission cost for transmitting a certain information unit.
3. The method according to claim 1 , wherein the weighting function maps channel resource usage to a factor for said combined congestion contribution.
4. The method according to claim 1 , wherein the index is inversely proportional to the spectral efficiency of the current MCS.
5. The method according to claim 1 , wherein the weighting function is further based on transmission power.
6. The method according to claim 1 , wherein a currently used transmission power on a downlink is mapped to said combined congestion contribution for packets directed to a corresponding wireless terminal.
7. The method according to claim 1 , wherein within the weighting function current channel characteristics reflect a relevant time period, which is achieved by averaging a specific value representing resource usage over time.
8. The method according to claim 1 , wherein the combined congestion contribution is used for determining a packet drop probability for RED (Random Early Detection).
9. The method according to claim 1 , wherein the combined congestion contribution is used for determining a congestion marking probability for ECN (Explicit Congestion Notification).
10. The method according to claim 1 , wherein the method is performed within a wireless base station of the network.
11. A wireless network composed of network elements comprising:
a base station and user terminals, wherein:
a queue management function based on an average queue length in the network elements is used;
said base station is configured to combine or multiply a result of a weighting function with the average queue length for determining a combined congestion contribution for use within the queue management function,
the said weighting function takes into account per-user information on a wireless channel condition, and said weighting function is based on a current MCS (Modulation Coding Scheme); and
said weighting function multiplies a marking or dropping probability calculated from the average queue length with an index that is based on the current MCS of a user, to generate said result.