Method and apparatus for adjusting channel quality information (CQI) considering handover

A method for adjusting channel quality indicator (CQI) measurements of a channel between a client device and a serving device within a wireless communication system, the method comprising:

• receiving, at a controller and from the client device, a first information and, when the client device is in a handover zone, a second information;
• transmitting, according to a switching sequence, either the first information alone or the first information together with the second information;
• receiving, at an adjustment function entity and from the controller according to the switching sequence, the first information together with the second information;
• and
• adjusting, at the adjustment function entity, the first information based on the second information by modifying said first information or keeping it unchanged,
• wherein the first information is related to the CQI measurements and the second information is related to the handover,
• wherein the step of adjusting the first information is based on a confidence interval,
• wherein the step of adjusting the first information comprises:
• performing a prediction procedure applied to the first information as to obtain a predicted first information, the prediction procedure comprising an estimation of the first information at a predefined future time;
• performing another prediction procedure applied to the second information as to obtain a predicted second information, the other prediction procedure comprising an estimation of the second information at the predefined future time;
• performing a quantization procedure applied to the predicted second information as to obtain a quantized predicted second information;
• computing the confidence interval around the predicted first information;
• if the quantized predicted second information is within the confidence interval, keeping the predicted first information unchanged and modifying the first information into the predicted first information;
• and
• if the quantized predicted second information is outside the confidence interval, correcting the predicted first information into a corrected predicted first information and modifying the first information into the corrected predicted first information.

A computer program product, comprising a program code stored on a non-transitory computer readable medium, wherein when the program code is executed on a computer, for performing a method comprising:

• receiving, at a controller and from the client device, a first information and, when the client device is in a handover zone, a second information;
• transmitting, according to a switching sequence, either the first information alone or the first information together with the second information;
• receiving, at an adjustment function entity and from the controller according to the switching sequence, the first information together with the second information;
• and
• adjusting, at the adjustment function entity, the first information based on the second information by modifying said first information or keeping it unchanged,
• wherein the first information is related to the CQI measurements and the second information is related to the handover,
• wherein the step of adjusting the first information is based on a confidence interval,
• wherein the step of adjusting the first information comprises:
• performing a prediction procedure applied to the first information as to obtain a predicted first information, the prediction procedure comprising an estimation of the first information at a predefined future time;
• performing another prediction procedure applied to the second information as to obtain a predicted second information, the other prediction procedure comprising an estimation of the second information at the predefined future time;
• performing a quantization procedure applied to the predicted second information as to obtain a quantized predicted second information;
• computing the confidence interval around the predicted first information;
• if the quantized predicted second information is within the confidence interval, keeping the predicted first information unchanged and modifying the first information into the predicted first information;
• and
• if the quantized predicted second information is outside the confidence interval, correcting the predicted first information into a corrected predicted first information and modifying the first information into the corrected predicted first information.