gnment A-MAP symbols. The Assignment A-MAP IE is masked by a sequence generated by a pseudo-random sequence generator. The mask randomizes the Assignment A-MAP IE data, making it practically impossible for unauthorized users to decode the content of the Assignment A-MAPs not belonging to them. A seed is used to initialize the pseudo-random sequence generator which is provided to the MS by the BS during network-entry or re-entry. A 16-bit CRC is generated based on the contents of the randomized Assignment A-MAP IE. If the randomized Assignment A-MAP IE bits are represented by polynomial an-1x-1 aN-2XN-2 + aix + ao, where AN-1 is the MSB of the randomized Assignment A-MAP IE and ao is the LSB of the randomized Assignment A-MAP IE. The 16-bit CRC is calculated as the remainder of dividing m(x)x16 by the 16-bit CRC generator polynomial g(x) x16 x12 + x5 + 1. The resulting CRC is denoted by c(x) = C15x15 + C14x14 + + C1X + CO where C15 is the MSB of the CRC and CO is the LSB of the CRC. A 16-bit CRC is generated based on the contents of assignment A-MAP IE and then is masked by a 16-bit CRC mask using the bitwise XOR operation ( ) ) to allow the mobile stations to uniquely identify their corresponding A-MAP IEs. The CRC can be masked using one of the following methods depending on the value of the masking prefix: The 16-bit mask comprises 1-bit masking prefix, 3-bit message type indicator, and 12-bit masking code. The 3-bit type indicator determines whether a 12-bit masking code based on the MS STID is used, or alternatively a 12-bit masking code is the same as that used to mask the Broadcast Assignment A-MAP IE, BR-ACK A-MAP IE, and Group Resource Allocation A-MAP IE. The 16-bit mask comprises 1-bit masking prefix and 15-bit Random Access Identifier (RAID). CHAPTER 10 The IEEE 802. 16m Physical Layer (Part II) The masked CRC is then appended to the Assignment A-MAP IE, resulting in a bit sequence of m(x) x16c(x) u(x) where u(x) is the masking polynomial. The resulting sequence of bits is encoded by the TBCC encoder w