Method and apparatus for operating multi-user collaborative spatial multiplexing in wireless communication system

A Base Station (BS) apparatus for operating multi-user Collaborative Spatial Multiplexing (CSM) in a wireless communication system, the BS apparatus comprising:

• an uplink transmission scheduler configured to perform uplink transmission scheduling on multiple Mobile Stations (MSs) for allocating the multiple MSs to multiple layers spatially discriminated for the multi-user CSM, wherein a first layer is allocated to a first MS and a second layer is allocated to at least one second MS;
• a demultiplexer configured to permutate resource units, which have been allocated to the multiple layers, by applying different permutation schemes according to the layers such that self-interference values between the first MS in the first layer and the at least one second MS in the second layer are averaged, and receiving uplink data, which is mapped to the permutated resource units, from the scheduled MSs;
• and
• a decoder configured to decode the uplink data,
• wherein the demultiplexer is configured to permutate the resource units by changing an array of indexes of the resource units according to a permutation scheme of each layer.

A method for operating multi-user Collaborative Spatial Multiplexing (CSM) in a Mobile Station (MS) of a wireless communication system, the method comprising:

• receiving, from a Base Station (BS), channel allocation information according to uplink transmission scheduling from the BS, wherein the channel allocation information indicates that multiple MSs are allocated to multiple layers spatially discriminated for the multi-user CSM such that a first layer is allocated a first MS and a second layer is allocated to at least one second MS;
• permutating resource units allocated to the MS based on the channel allocation information by applying a relevant permutation scheme to a layer allocated to the MS among the multiple layers such that self-interference values between the first MS in the first layer and the at least one second MS in the second layer are averaged;
• and
• transmitting uplink data to the BS through the permutated resource units,
• wherein resource units allocated to the multiple layers are permutated by using different permutation schemes according to the layers,
• wherein the permutating changes an array of indexes of the resource units according to a permutation scheme of each layer.

A Mobile Station (MS) apparatus for operating multi-user Collaborative Spatial Multiplexing (CSM) in a wireless communication system, the MS apparatus comprising:

• an MAP receiver configured to receive channel allocation information according to uplink transmission scheduling from a Base Station (BS) through a MAP message, wherein the channel allocation information indicates that multiple MSs are allocated to multiple layers spatially discriminated for the multi-user CSM such that a first layer is allocated a first MS and a second layer is allocated to at least one second MS;
• an encoder configured to encode uplink data desired to be transmitted;
• and
• a multiplexer configured to permutate resource units allocated to the MS based on the channel allocation information by applying a relevant permutation scheme to a layer allocated to the MS among the multiple layers such that self-interference values between the first MS in the first layer and the at least one second MS in the second layer are averaged, map the encoded data into the permutated resource units, and transmit the encoded data mapped into the permutated resource units to the BS,
• wherein the multiplexer is configured to permutate the resource units by changing an array of indexes of the resource units according to a permutation scheme of each layer.