fa مروری بر روند توسعه ارتباطات گوشی‌های هوشمند با شبکه‌های ماهواره‌ای نسل آینده تخصصي Special علمی- ترویجی Scientific-extension <span style="font-size:12pt"><span style="line-height:normal"><span style="direction:rtl"><span style="unicode-bidi:embed"><span style="font-family:Calibri,sans-serif"><span style="color:black"><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">با توجه به نفوذ بالای تلفن همراه به ویژه گوشی</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های هوشمند، ارایه خدمت اتصال مستقیم گوشی</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های هوشمند </span></span></b><b><span lang="FA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">با</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:"> ماهواره، فرصت</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های جدیدی برای افزایش اتصال جهانی ایجاد خواهد کرد</span></span></b><b><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">.</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:"> انتظار می</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">رود با پیشرفت</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های بیشتر در فناوری، صنعت ارتباطات بی</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">سیم متحول شود. با توجه به</span></span></b><b><span lang="FA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:"> افزایش </span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">درخواست خدمات ارتباطی به خصوص در مناطق کم</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">برخوردار و یا بی</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">بهره از شبکه ارتباطی زمینی، توسعه خدمات ماهواره</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">ای در مدار پایین زمین </span></span></b><b><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">(LEO)</span></span></b><b><span style="font-size:10.0pt"><span b="" nazanin="" style="font-family:"> راه</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">گشای پاسخگویی به این نیاز می‌باشد</span></span></b><b><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">.</span></span></b><b><span style="font-size:10.0pt"><span b="" nazanin="" style="font-family:"> ماهواره</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های لئو به دلیل داشتن</span></span></b><b><span lang="FA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:"> تاخیر کمتر، همسو با الزامات فنی نسل</span></span></b><b><span dir="LTR" lang="FA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="FA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های جدید شبکه</span></span></b><b><span dir="LTR" lang="FA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="FA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های مخابراتی می</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="FA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">باشند. </span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">ارزان شدن طراحی، ساخت و پرتاب ماهواره، ارتباطات ماهواره</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">ای را مقرون به صرفه و قابل رقابت از لحاظ نیازمندی</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های خدمات ارتباطی کرده هر چند در ارایه این نوع خدمت، چالش</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های مختلفی مانند محدودیت بکارگیری طیف فرکانسی و </span></span></b><b><span lang="FA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">همچنین محدویت بودجه لینک مانند</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:"> توان ارسالی و غیره هنوز وجود دارد. امروزه، شرکت</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های بزرگی مانند </span></span></b><b><span dir="LTR" style="font-size:8.0pt"><span new="" roman="" style="font-family:" times="">AST Space mobie</span></span></b><b><span lang="FA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">، </span></span></b><b><span dir="LTR" style="font-size:8.0pt"><span new="" roman="" style="font-family:" times="">Lynk</span></span></b><b> </b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">و اسپیس ایکس در حال رقابت جهت برقراری ارتباط مستقیم با گوشی</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های هوشمند می</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">باشند. در این مقاله به ارایه فعالیت</span></span></b><b><span dir="LTR" lang="AR-SA" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&lrm;</span></span></b><b><span lang="AR-SA" style="font-size:10.0pt"><span b="" nazanin="" style="font-family:">های انجام شده توسط چند شرکت پیشرو پرداخته شده است</span></span></b><span lang="AR-SA" style="font-size:14.0pt"><span b="" nazanin="" style="font-family:">.</span></span></span></span></span></span></span></span><br> &nbsp; <b><span style="font-size:11.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">Due to the high penetration of mobile phone, especially smart phones, providing direct connection service of smartphones with satellite will create new opportunities to increase global connectivity. With further advancements in technology, the wireless communications industry is expected to evolve. Due to the increase in the demand for communication services, especially in underprivileged areas or without using the terrestrial communication network, the development of satellite services in low earth orbit (LEO) is the solution to meet this need. LEO satellites due to having less delay, are compatible with the technical requirements of new generations of telecommunication networks. The cheapening of designing, manufacturing and launching satellite has made satellite communications cost-effective and competitive in terms of service requirements. Of course, in providing this type of service, there are various challenges, such as the limitation of using the frequency spectrum, as well as the limitation of the link budget, such as transmission power, etc. Today, big companies such as AST Space mobie, Lynk and SpaceX are competing with each other to communicate directly with smartphones. In this article, the actions taken and the activities of leading companies have been presented.</span></span></span></b> ارتباط مستقیم با ماهواره, نسل پنجم شبکه‎ ارتباطی(5G), گوشی هوشمند Direct connection with satellite, Fifth generation of communication networks, Smart phone 40 49 http://kiaeee.ir/browse.php?a_code=A-10-466-8&slc_lang=fa&sid=1 پدرام حاجی پور 10031947532846001160 10031947532846001160 No لیلا محمدی 10031947532846001161 10031947532846001161 Yes