Qiaobing Xie, with Randall R. Stewart, is designer of the SCTP protocol. Mr. Stewart originally invented the protocol while at Motorola. Subsequently, Dr. Xie and Mr. Stewart worked together to perfect the protocol and submit it to the Internet Engineering Task Force (IETF), the leading Internet technical standards body. Both men are the principal authors and editors of the protocol drafts. They also developed the reference implementation. Dr. Xie is a Principal Staff Engineer at Motorola.