pdu.rar_MAC PDU_mac_mac layer in wimax_mac pdu matlab_matlab MAC

%=========================================================================% % MAC PDU =[Header+Payload+CRC] % %=========================================================================% function macpdu = pdu (payload) %#em1 %generic mac header. gmh=zeros(1,48); %CRC generation gen_crc = division_crc(payload); %the added bits( data(payload) 轻熟 邮智� 轻� 轻) pay_crc = horzcat(payload,gen_crc); %payload+crc bits %%%identify gmh fields%%% a=length(gmh); b=length(payload); HT=0; EC=1; EKS=[0 0]; type(1)=0; %mesh subheader=0 type(2)=1; %ARQ feedback sub.=1 type(3)=0; %extended sub.=0 type(4)=0; %frag sub.=0 type(5)=0; %pack sub.=0 type(6)=0; %UL&DL subheader=0 CI=0; %CRC indicator LEN=de2bi(((a+b+32)/8),11); %64 bytes payload + 6bytes header + 16 bit CRC CID=randint(1,16,2); %connection identifier gmh(1,1)=HT; %header type gmh(1,2)=EC; %encryption control gmh(1,[3:8])=type; %indicate the subheaders & special payload gmh(1,9)=0; %reserved gmh(1,10)=CI; %CRC indicator gmh(1,[11:12])=EKS; %Encryption key sequence gmh(1,13)=0; %reserved gmh(1,[14:24])=LEN; %MAC PDU Length in bytes (icluding mac header & CRC) gmh(1,[25:40])=CID; %conn. identifier HCS=hcs(gmh(1,[1:40])); %Header check seq gmh(1,[41:48])=HCS; %Header check seq. %%%================The final mac pdu=========================%%% macpdu=horzcat(gmh,pay_crc); end