Patent ID: 7639645

Claim:
A processor implemented method comprising: a) receiving a radio link control (RLC) data block having at least one Extension (E) bit for indicating the presence of one or more optional extension octets in the RLC data block, wherein each extension octet comprises a 7-bit length indicator (LI) for indicating the length of a Logical Link Control Protocol Data Unit (LLC PDU) that ends in that RLC data block, and a further Extension (E) bit to indicate any further optional extension octets; b) determining a logical value of said at least one Extension (E); in the event said bit is a first logical value then c1) calculating a sum of said length indicators (LIs) in said RLC data block; c2) calculating a number of bytes in said RLC data block wherein the number of bytes in the RLC data block is the number of whole bytes minus the number of length indicators (LIs); and c3) discarding said RLC data block in the event said sum exceeds said number of bytes in said RLC data block and in response executing step a); or in the event said bit is other than said first logical value then c4) executing step a).