Method of controlling noise rise in a cell
View Patent ↗After a maximum noise rise for a cell is set, a maximum noise rise for each mobile station is allocated within the cell. The actual noise rise from each mobile station within the cell is measured at a base station and signaled to a network. When the cell uses enhanced dedicated channel (E-DCH), the contribution to noise rise of E-DCH signaling is determined and received signal code power (RSCP) at the base station is measured. The RSCP measurement is decoded to determine contributions from mobile stations within and outside the cell; contributions from mobile stations within the cell are calculated; and the network is notified of the measured noise rise. In addition a compensation value may be applied to compensate for temperature induced noise.
1. A method of reporting noise rise in a cell using enhanced dedicated channel operation, the method comprising:
setting a maximum noise rise for a cell;
allocating the maximum noise rise among each mobile station within the cell;
measuring, at a base station, actual noise rise from each mobile station within the cell;
measuring received signal code power at the base station;
decoding the received signal code power measurement to determine contributions thereof from mobile stations within and outside the cell;
calculating noise contributions from mobile stations within the cell;
determining a measured noise rise due to only enhanced dedicated channel transmissions; and
notifying a network of the actual noise rise at the base station and the measured noise rise due to only enhanced dedicated channel transmissions.
2. A method according to claim 1 , further comprising determining at the base station and notifying the network of an amount of noise at the base station due to legacy channel transmissions and due to other cells.
3. A method according to claim 1 , further comprising applying a compensation value to compensate for temperature induced changes in noise.
4. A method according to claim 3 , wherein the compensation value is calculated in advance and stored.
5. A method according to claim 4 , wherein a plurality of compensation values are stored in a look up table.
6. A method according to claim 3 , wherein the compensation value includes a factor by which to modify a measurement of received total wideband power taken when no uplink transmissions are taking place.
7. A method according to claim 6 , wherein the base station is a Node B; the mobile station is user equipment; and the network includes a radio network controller.
8. A method according to claim 7 , wherein the cell is part of a third generation communication system.
9. A method of controlling noise rise in a cell using enhanced dedicated channel operation, comprising:
setting a maximum noise rise for a cell;
allocating the maximum noise rise among each mobile station within the cell;
measuring, at a base station, an actual noise rise from each mobile station within the cell;
signalling the actual noise rise at the base station to a network;
determining a contribution to noise rise due to only enhanced dedicated channel transmissions; and
applying a compensation value to compensate for temperature induced changes in noise.
10. A method according to claim 9 , wherein the compensation value is calculated in advance and stored.
11. A method according to claim 10 , wherein a plurality of compensation values are stored in a look up table.
12. A method according to claim 9 , wherein the compensation value includes a factor by which to modify a measurement of received total wideband power taken when no uplink transmissions are taking place.
13. A method of determining a rise in power or noise attributed to enhanced dedicated channel transmissions comprising:
measuring, by a base station, a received total wideband power for a cell;
measuring, by the base station, a sum of received signal code power contributions only for enhanced dedicated channel transmissions from one or more mobile stations;
determining, by the base station based on the received total wideband power and the sum of the received signal code power contributions, a share of increased power for the cell attributed to only the enhanced dedicated channel transmissions; and
notifying a network of the received total wideband power for the cell and the determined share of increased power for the cell attributed to the enhanced dedicated channel transmissions.
14. A method according to claim 13 , wherein the measuring the received total wideband power comprises:
measuring, by the base station, a received total wideband power for a cell received by the base station during a quiet period when one or more mobile stations are not transmitting.
15. A method according to claim 13 , wherein the determining comprises:
determining, by the base station, a share of increased power for the cell attributed to only the enhanced dedicated channel signals according to the following:
the increased power attributed to only the enhanced dedicated channel signals=the sum of the received signal code power contributions/the received total wideband power.
16. A network node operating a cell of a wireless communication system, the network node configured to:
measure, by the base station, a received total wideband power for a cell;
measure, by the base station, a sum of received signal code power contributions only for enhanced dedicated channel transmissions from one or more mobile stations;
determine, by the base station based on the received total wideband power and the sum of the received signal code power contributions, a share of increased power for the cell attributed to only the enhanced dedicated channel transmissions; and
notify a network of the received total wideband power for the cell and the determined share of increased power for the cell attributed to only the enhanced dedicated channel transmissions.