{"id":5452,"date":"2023-08-25T18:34:53","date_gmt":"2023-08-25T18:34:53","guid":{"rendered":"https:\/\/getmyprojects.in\/projects\/?post_type=product&#038;p=5452"},"modified":"2023-10-26T14:02:31","modified_gmt":"2023-10-26T08:32:31","slug":"cooperative-spectrum-sharing-a-contract-based-approach","status":"publish","type":"product","link":"https:\/\/getmyprojects.in\/projects\/product\/cooperative-spectrum-sharing-a-contract-based-approach\/","title":{"rendered":"Cooperative Spectrum Sharing: A Contract-Based Approach"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"color: #000000;\">Providing economic incentives to all parties involved is essential for the success of dynamic spectrum access. Cooperative spectrum sharing is one effective way to achieve this, where secondary users (SUs) relay traffics for primary users (PUs) in exchange for dedicated spectrum access time for SUs\u2019 own communications. In this paper, we study the cooperative spectrum sharing under incomplete information, where SUs\u2019 wireless characteristics are private information and not known by a PU.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">We model the PU-SU interaction as a labor market using contract theory. In contract theory, the employer generally does not completely know employees\u2019 private information before the employment and needs to offers employees a contract under incomplete information. In our problem, the PU and SUs are, respectively, the employer and employees, and the contract consists of a set of items representing combinations of spectrum accessing time (i.e., reward) and relaying power (i.e., contribution).<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">We study the optimal contract design for both weakly and strongly incomplete information scenarios. In the weakly incomplete information scenario, we show that the PU will optimally hire the most efficient SUs and the PU achieves the same maximum utility as in the complete information benchmark.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">In the strongly incomplete information scenario, however, the PU may conservatively hire less efficient SUs as well.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">We further propose a decompose-and-compare (DC) approximate algorithm that achieves a close-to-optimal contract. We further show that the PU\u2019s average utility loss due to the suboptimal DC algorithm and the strongly incomplete information are relatively small (less than 2 and 1.3 percent, respectively, in our numerical results with two SU types).<\/span><\/p>\n<ul>\n<li style=\"text-align: justify;\"><span style=\"color: #000000;\">In our problem, the PU and SUs are, respectively, the employer and employees, and the contract consists of a set of items representing combinations of spectrum accessing time (i.e., reward) and relaying power (i.e., contribution).<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"color: #000000;\">We study the optimal contract design for both weakly and strongly incomplete information scenarios. In the weakly incomplete information scenario, we show that the PU will optimally hire the most efficient SUs and the PU achieves the same maximum utility as in the complete information benchmark.<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"color: #000000;\">In the strongly incomplete information scenario, however, the PU may conservatively hire less efficient SUs as well. We further propose a decompose-and-compare (DC) approximate algorithm that achieves a close-to-optimal contract.<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"color: #000000;\">We further show that the PU\u2019s average utility loss due to the suboptimal DC algorithm and the strongly incomplete information are relatively small (less than 2 and 1.3 percent, respectively, in our numerical results with two SU types).<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<table style=\"width: 76.3705%; height: 96px;\">\n<tbody>\n<tr style=\"height: 24px;\">\n<th style=\"height: 24px; width: 19.1176%;\"><strong>Project Name<\/strong><\/th>\n<td style=\"height: 24px; width: 79.5752%;\">Cooperative Spectrum Sharing: A Contract-Based Approach<\/td>\n<\/tr>\n<tr class=\"alt\" style=\"height: 24px;\">\n<th style=\"height: 24px; width: 19.1176%;\"><strong>Front End\u00a0<\/strong><\/th>\n<td style=\"height: 24px; width: 79.5752%;\"><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<th style=\"height: 24px; width: 19.1176%;\"><strong>Back End<\/strong><\/th>\n<td style=\"height: 24px; width: 79.5752%;\"><\/td>\n<\/tr>\n<tr class=\"alt\" style=\"height: 24px;\">\n<th style=\"height: 24px; width: 19.1176%;\"><\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":5800,"comment_status":"open","ping_status":"closed","template":"","meta":{"inline_featured_image":false},"product_cat":[29,28],"product_tag":[291,292,293,294,32,33,295,143,296],"_links":{"self":[{"href":"https:\/\/getmyprojects.in\/projects\/wp-json\/wp\/v2\/product\/5452"}],"collection":[{"href":"https:\/\/getmyprojects.in\/projects\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/getmyprojects.in\/projects\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/getmyprojects.in\/projects\/wp-json\/wp\/v2\/comments?post=5452"}],"version-history":[{"count":2,"href":"https:\/\/getmyprojects.in\/projects\/wp-json\/wp\/v2\/product\/5452\/revisions"}],"predecessor-version":[{"id":6457,"href":"https:\/\/getmyprojects.in\/projects\/wp-json\/wp\/v2\/product\/5452\/revisions\/6457"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/getmyprojects.in\/projects\/wp-json\/wp\/v2\/media\/5800"}],"wp:attachment":[{"href":"https:\/\/getmyprojects.in\/projects\/wp-json\/wp\/v2\/media?parent=5452"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/getmyprojects.in\/projects\/wp-json\/wp\/v2\/product_cat?post=5452"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/getmyprojects.in\/projects\/wp-json\/wp\/v2\/product_tag?post=5452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}