Selective rank CQI and PMI feedback in wireless networks

A method for providing feedback information in a wireless network, comprising:

• receiving a configuration message indicating at least a first type of feedback information and a subset S1, wherein S1 is a subset of S0, wherein the set S1 comprises all possible values of the first type of feedback information and wherein each element in the set S0 is identifiable by an index;
• selecting an element E1 from the set S1;
• and
• feeding back the selected element E1 in a feedback transmission instance wherein feeding back the selected element E1 further comprises feeding back an index of the selected element E1 in the set S0 and wherein feeding back the index of the selected element E1 in the set S0 further comprises feeding back the index of the selected element E1 in the set S0 using ceil(log2(N0)) bits, wherein N0 is the number of element in S0.

An apparatus for transmitting in a wireless network, comprising:

• processing circuitry coupled to a memory, receiving circuitry and transmission circuitry;
• the receiving circuitry being operable to receive a configuration message indicating at least a first type of feedback information and a subset S1, wherein S1 is a subset of S0, wherein the set S0 comprises all possible values of the first type of feedback information, such that the subset S1 is stored in the memory and wherein each element in the set S1 is identifiable by an index;
• the processing circuitry being operable to select an element E1 from the set S1;
• and
• the transmitting circuitry being operable to feed back the selected element E1 in a feedback transmission instance, wherein feeding back the selected element E1 comprises feeding back an index of the selected element E1 in the set S1 and wherein feeding back the index of the selected element E1 in the set S1 further comprises feeding back the index of the selected element E1 in the set S1 using ceil(log2(N1)) bits, wherein N1 is the number of elements in S1.

An apparatus for transmitting in a wireless network, comprising:

• processing circuitry coupled to a memory, receiving circuitry and transmission circuitry, wherein the memory contains a subset S1, wherein S1 is a subset of S0, wherein the set S0 comprises all possible values of the first type of feedback information and wherein each element in the set S1 is identifiable by an index;
• the transmitting circuitry being operable to transmit a configuration message indicating at least a first type of feedback information and the subset S1;
• and
• the receiving circuitry being operable to receive feedback of a selected element E1 in a feedback transmission instance, wherein the element E1 was selected from the set S1, wherein receiving feedback comprises receiving an index of the selected element E1 in the set S1 and wherein the received index of the selected element E1 comprises ceil(log2(N1)) bits, wherein N1 is the number of elements in S1.