Một số vấn đề vẫn cần được nghiên cứu như cần hoàn thiện phần tính toàn lý thuyết, để cho mô hình sát với thực tế hơn thì cần kết hợp phân tích ảnh hưởng của kênh truyền trễ và có lỗi đồng thời với sự ảnh hưởng do ước lượng kênh truyền sai. Tối ưu hóa hệ thống qua các yếu tố khác như tối ưu công suất tiêu thụ và tối ưu việc lựa chọn người sử dụng và băng thông cũng như công suất trên đường hồi tiếp khi hệ thống có nhiều người sử dụng.
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