Patent ID: 8848673

Claim:
A method comprising: a) transmitting, by a first base station, a first message to initiate an association between said first base station and a second base station, said first message comprising a first initiation tag; b) receiving, by said first base station, a second message from said second base station, said second message comprising: i) a second verification tag, said second verification tag equal to said first initiation tag; ii) a second initiation tag; and iii) a first state parameter comprising: (1) at least one parameter related to operational information of said association; and (2) a message authentication code generated as a function of a private key; c) transmitting, by said first base station, at least one third message to said second base station, said at least one third message comprising: i) a first verification tag, said first verification tag equal to said second initiation tag; and ii) a parameter comprising said first state parameter; and d) receiving, by said first base station, at least one fourth message from said second base station, said at least one fourth message comprising: i) an acknowledgement for the receipt of said parameter; and ii) a first application protocol message, comprising: (1) an identifier of said second base station; (2) at least one mobility management entity group identifier; and (3) a second beamforming codebook comprising a second plurality of beamforming codewords, each of said second plurality of beamforming codewords being identifiable by an index, said index presented by a number of bits, said number of bits being: (a) greater than or equal to log 2 (N), N being the number of said second plurality of beamforming codewords; and (b) less than the number of bits in a corresponding beamforming codeword; e) receiving, by said first base station from said second base station, at least one second application protocol message comprising at least one index in a plurality of indexes, said at least one index identifying a subset of said second plurality of beamforming codewords; and f) transmitting, by said first base station, signals to a plurality of wireless devices employing a first plurality of beamforming codewords from a first beamforming codebook, said first plurality of codewords being selected, at least in part, employing said subset of said second plurality of beamforming codewords.