Null-steering using interference alignment for multi-access point (AP) coordination using channel state information

A system comprising:

• a memory storage;
• and
• a processing unit coupled to the memory storage, wherein the processing unit is operative to:
• send a coordination request for Multi-Access Point (AP) Coordination (MAPC) to implement null-steering and interference alignment;
• receive a coordination response from one or more APs to join the MAPC;
• send a Channel State Information (CSI) request;
• receive CSI of one or more clients associated with the one or more APs;
• determine one or more precoder matrices and one or more decoder matrices based on the CSI of the one or more clients;
• send the one or more precoder matrices to the one or more APs;
• send the one or more decoder matrices to the one or more clients;
• transmit to a first client using null-steering and interference alignment based on the one or more precoder matrices, wherein the transmitting is synchronized with transmissions by the one or more APs to the one or more clients;
• receive a list of clients from the one or more APs, wherein:
• the list of clients includes the one or more clients, and
• the CSI request comprises a request for the CSI of the one or more clients;
• determine a group of low interference positioned clients, wherein the list of clients includes the group of low interference positioned clients and the one or more clients are high interference positioned clients;
• and
• select the high interference positioned clients for communicating with null-steering and interference alignment, wherein determining the one or more precoder matrices and the one or more decoder matrices is based on CSI of the high interference positioned clients.

A non-transitory computer-readable medium that stores a set of instructions which when executed perform a method executed by the set of instructions comprising:

• sending a coordination request for Multi-Access Point (AP) Coordination (MAPC) to implement null-steering and interference alignment;
• receiving a coordination response from one or more APs to join the MAPC;
• sending a Channel State Information (CSI) request;
• receiving CSI of one or more clients associated with the one or more APs;
• determining one or more precoder matrices and one or more decoder matrices based on the CSI of the one or more clients;
• sending the one or more precoder matrices to the one or more APs;
• sending the one or more decoder matrices to the one or more clients;
• and
• transmitting to a first client using null-steering and interference alignment based on the one or more precoder matrices, wherein the transmitting is synchronized with transmissions by the one or more APs to the one or more clients;
• receiving a list of clients from the one or more APs, wherein:
• the list of clients includes the one or more clients, and
• the CSI request comprises a request for the CSI of the one or more clients;
• determining a group of low interference positioned clients, wherein the list of clients includes the group of low interference positioned clients and the one or more clients are high interference positioned clients;
• and
• selecting the high interference positioned clients for communicating with null-steering and interference alignment, wherein determining the one or more precoder matrices and the one or more decoder matrices is based on CSI of the high interference positioned clients.