Method for selecting modulation and coding scheme, base station communication module and customer premise equipment communication module

A Base Station (BS) communication module, comprising:

• a first communication unit configured for receiving a plurality of first packets in a first period;
• a Carrier to Interference plus Noise Ratio (CINR) adjusting unit configured for performing the following steps:
• calculating a Packet Error Rate (PER) according to the first packets;
• determining whether the PER is greater than an error rate threshold;
• and
• when the PER is greater than the error rate threshold, performing the following steps:
• obtaining a CINR return value;
• performing an adjusting procedure to obtain a CINR adjustment value;
• and
• calculating an actual return value according to the CINR return value and the CINR adjustment value;
• and
• a Modulation and Coding Scheme (MCS) selecting unit configured for selecting one of a plurality of MCSs according to the actual return value.

A Customer Premise Equipment (CPE) communication module, communicating with a Base Station (BS) communication module and comprising:

• a second communication unit configured for receiving a plurality of first packets in a first period;
• and
• a Carrier to Interference plus Noise Ratio (CINR) adjusting unit configured for performing the following steps:
• calculating a Packet Error Rate (PER) according to the first packets;
• determining whether the PER is greater than an error rate threshold;
• and
• when the PER is greater than the error rate threshold, performing the following steps:
• obtaining a CINR return value;
• performing an adjusting procedure to obtain a CINR adjustment value;
• calculating an actual return value according to the CINR return value and the CINR adjustment value;
• and
• sending the actual return value to the BS communication module, so that the BS communication module selects one of a plurality of Modulation and Coding Schemes (MCSs) according to the actual return value.