{"created":"2023-06-20T13:22:52.750867+00:00","id":3591,"links":{},"metadata":{"_buckets":{"deposit":"93525a7e-37de-45bc-952a-f2cef1e08731"},"_deposit":{"created_by":21,"id":"3591","owners":[21],"pid":{"revision_id":0,"type":"depid","value":"3591"},"status":"published"},"_oai":{"id":"oai:ir.soken.ac.jp:00003591","sets":["2:429:19"]},"author_link":["1465","1463","1464"],"item_1_creator_2":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"NGUYEN, Kien"}],"nameIdentifiers":[{}]}]},"item_1_creator_3":{"attribute_name":"フリガナ","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"グエン, キエン"}],"nameIdentifiers":[{}]}]},"item_1_date_granted_11":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2012-09-28"}]},"item_1_degree_grantor_5":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"総合研究大学院大学"}]}]},"item_1_degree_name_6":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（情報学）"}]},"item_1_description_12":{"attribute_name":"要旨","attribute_value_mlt":[{"subitem_description":"The past two decades have seen increasing interests in the field of wireless sensor networks\r\n(WSNs), which have potential applications covering all aspects of the human life. The major\r\nissue in WSNs is power conservation since wireless sensors are usually battery-powered.\r\nIn a typical sensor node, the wireless interface consumes the largest share of the power\r\nbudget. Hence, an energy efficient medium access control (MAC) protocol is vital. The MAC\r\nprotocol always adopts the duty cycling mechanism to reduce idle listening, which is the most\r\nsignificant energy wastage. The mechanism, however, has negative effects on latency and\r\nthroughput performance. Meanwhile, an increasing number of prospective applications not\r\nonly imposes requirements on energy efficiency but also on other Quality of Services (QoS)\r\nparameters. Therefore, it is great of importance to design new efficient MAC protocols,\r\nwhich meet the energy efficiency and QoS requirements.\r\nWe first focus on designing energy efficient, low latency MAC protocols for low data rate\r\nWSNs. The traditional approach is letting a duty cycling MAC protocol forward packets\r\nvia multiple hops in a cycle, i.e., the multi-hop MAC. However, the original multi-hop MAC\r\nprotocol incurs a large control overhead, and a so-called long listening period problem. We\r\npropose a low latency, low control overhead MAC protocol (the LO-MAC), which overcomes\r\nthe mentioned disadvantages by exploiting the physical properties of wireless channel. LO-\r\nMAC introduces a new traffic adaptive scheme based on carrier sensing characteristics. The\r\nscheme effectively controls the length of listening period following the traffic load. Moreover,\r\nLO-MAC takes full advantages of the broadcast nature and lets a packet containing diffierent\r\nmeanings during its transmission. Therefore, the number of transmitting packets and the\r\ncontrol overhead is significantly reduced.\r\nSecondly, we introduce an approach in designing efficient MAC protocols for dynamic load\r\nenvironments. We propose MAC2 protocol, a novel Multi-hop Adaptive MAC protocol with\r\npacket Concatenation. MAC2 achieves a better performance than a state-of-the-art protocol\r\nin terms of energy efficiency, low latency and high throughput. The proposed protocol\r\ncontrols the adaptation to the traffic load by combining a signalling traffic adaptive scheme\r\nand a demand wakeup manner. The scheme and the manner are based on a synchronization\r\nprocess and a proportional mapping function, respectively. Besides that, the protocol has a\r\nconcatenation scheme, which concatenates several queued packets into a bigger one before\r\nsending out of a node. The concatenation scheme reduces not only the control overhead but\r\nalso the average latency. Additionally, MAC2 is numerically optimized to achieve minimum\r\nlatency and guarantee no data transmission collision.\r\nFinally, we also target the dynamic load environments, but take an asynchronous approach\r\nof the efficient MAC design. We propose an Asynchronous MAC protocol with QoS awareness\r\n(the AQ-MAC), which is energy efficient and provides different QoS levels to relevant types\r\nof traffic. AQ-MAC achieves energy efficiency and collision avoidance by utilizing a receiver-\r\ninitiated transmission and the concatenation scheme derived from MAC2. Moreover, AQ-\r\nMAC adopts the diffierentiate service (DiffServ) model to provide QoS. Data packets are\r\nprovided diffierent transmission strategies depending on their levels of importance.","subitem_description_type":"Other"}]},"item_1_description_7":{"attribute_name":"学位記番号","attribute_value_mlt":[{"subitem_description":"総研大甲第1557号","subitem_description_type":"Other"}]},"item_1_select_14":{"attribute_name":"所蔵","attribute_value_mlt":[{"subitem_select_item":"有"}]},"item_1_select_8":{"attribute_name":"研究科","attribute_value_mlt":[{"subitem_select_item":"複合科学研究科"}]},"item_1_select_9":{"attribute_name":"専攻","attribute_value_mlt":[{"subitem_select_item":"17 情報学専攻"}]},"item_1_text_10":{"attribute_name":"学位授与年度","attribute_value_mlt":[{"subitem_text_value":"2012"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"NGUYEN, Kien","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-02-17"}],"displaytype":"simple","filename":"甲1557_要旨.pdf","filesize":[{"value":"223.5 kB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"要旨・審査要旨","url":"https://ir.soken.ac.jp/record/3591/files/甲1557_要旨.pdf"},"version_id":"32b9cfe4-50bb-4635-8356-7f1e22de2f72"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-02-17"}],"displaytype":"simple","filename":"甲1557_本文.pdf","filesize":[{"value":"1.8 MB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"本文","url":"https://ir.soken.ac.jp/record/3591/files/甲1557_本文.pdf"},"version_id":"39d374cc-42ec-484a-b396-30fe581725c9"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"thesis","resourceuri":"http://purl.org/coar/resource_type/c_46ec"}]},"item_title":"EFFICIENT MAC PROTOCOL DESIGN FOR WIRELESS SENSOR NETWORKS","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"EFFICIENT MAC PROTOCOL DESIGN FOR WIRELESS SENSOR NETWORKS"},{"subitem_title":"EFFICIENT MAC PROTOCOL DESIGN FOR WIRELESS SENSOR NETWORKS","subitem_title_language":"en"}]},"item_type_id":"1","owner":"21","path":["19"],"pubdate":{"attribute_name":"公開日","attribute_value":"2013-06-14"},"publish_date":"2013-06-14","publish_status":"0","recid":"3591","relation_version_is_last":true,"title":["EFFICIENT MAC PROTOCOL DESIGN FOR WIRELESS SENSOR NETWORKS"],"weko_creator_id":"21","weko_shared_id":-1},"updated":"2023-06-20T15:28:37.680597+00:00"}