Have you by any chance read A History of World Societies by John P. McKay (and several others)? I know there's a concise version out there that might interest you.

Ibn Battutah is a great primary source. I've used it twice and the students love it. Ibn Battutah traveled most of the known world and undergrads think he's hilarious. This is a really solid abridgement of the complete text that is cheap and accessible, http://www.worldcat.org/title/travels-of-ibn-battutah/oclc/49394398&referer=brief_results.

I have a lot of thoughts about this, having been in a similar situation myself recently. But rather than typing a long comment, it would probably be more useful to just refer you to Antoinette Burton's excellent primer on doing just what you're doing.

At least for me, the most comforting thought in working through a global history course, from making the syllabus to holding discussions and assigning papers, is the idea that teaching global history is impossible. Embracing that idea leads to the more critical questions: why is it important to do this impossible thing? If we can't get anything remotely approaching coverage, what can we do? How can we achieve breadth and depth without sacrificing too much of either? There are many, many ways to design a syllabus in a way that gets at those questions, but none of them will really be adequate. That frees us up in a way to be creative and to use global history courses as a tool to get students to think critically about history, the work historians do, and how a course like this should be constructed.

Can you please use the same textbook as the other professors? You know, so that students can buy (and sell) their books instead of having to pay a lot of money for a text that has no resale value.

...or, is this a new course? When you say "one semester" should I infer that the course is only being offered once?

Also, are you a full professor? Or are you using the word in its more colloquial usage?