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題 名 | Performance of STDD-PRMA: A Reservation Multiple Access Protocol for Microcellular Communications=適用於微細胞通信的STDD-PRMA多重進接方式之系統效能 |
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作 者 | 溫志宏; 楊勝全; | 書刊名 | Proceedings of the National Science Council : Part A, Physical Science and Engineering |
卷 期 | 23:3 1999.05[民88.05] |
頁 次 | 頁382-388 |
分類號 | 448.82 |
關鍵詞 | 微細胞通信; 分享式時間雙工; 封包保留多重進接; STDD-PRMA; Microcellular communications; Packet dropping probability; System capacity; |
語 文 | 英文(English) |
中文摘要 | 本文的內容主要是探討一種結合分享式時間雙工(STDD)和封包保留多重進接 (PRMA)的進接方式。利用分享式時間雙工可以使上下兩鏈路共用同一通道,且可以像封包 保留多重進接一樣保留通道的使用權,此外,為了更有效的利用通道,基地台必須具備中央 控制的功能來安排可利用的通道給需要的鏈路,安排的順序則是以向下鏈路為優先。在這篇 文章中,我們將描述STDD-PRMA的運作原理,並且探討系統變數的影響,以及比較原始 PRMA和STDD-PRMA的系統效能,當分別使用低和高通話活動偵測器時,PRMA可容納 37和39個使用者,STDD-PRMA則可達到44和47個使用者。 |
英文摘要 | A reservation multiple access protocol combining shared time division duplexing (STDD) and packet reservation multiple access (PRMA), called STDD-PRMA, is proposed. It allows both the uplink and downlink traffic to share a common channel by means of the STDD scheme and to reserve subsequent time slots in future frames as in PRMA. For flexible use of the channel bandwidth, the base station plays a central control role in assigning available slots to unreserved downlink talkspurts without contentions prior to assignment to unreserved uplink talkspurts with successful contentions. In this paper, we describe the STDD-PRMA operation, evaluate sensitivities to system variables and make performance comparisons between PRMA and STDD-PRMA. Simulation results show the STDD-PRMA supports up to 44 (47) simultaneous conversations compared to 37 (39) for PRMA with a slow (fast) speech activity detector. |
本系統中英文摘要資訊取自各篇刊載內容。