基于異構無線通信網(wǎng)絡的切換算法研究
發(fā)布時間：2018-08-31 08:17
【摘要】：在通信網(wǎng)絡飛速發(fā)展的今天,用戶對于網(wǎng)絡性能的要求越來越高,多網(wǎng)融合可以顯著提升系統(tǒng)性能,因此異構無線網(wǎng)絡正在成為未來通信發(fā)展的趨勢之一。與此同時,家庭基站等小型網(wǎng)絡技術的引入對異構網(wǎng)絡切換系統(tǒng)提出了更高的技術要求。本文針對目前異構網(wǎng)絡切換判決算法準入標準復雜,無線鏈路失敗率高等缺點,提出改進的切換算法。首先,本文提出一種改進的基于速度感知機制的層次切換算法。針對現(xiàn)有異構網(wǎng)絡切換算法大多沒有考慮家庭基站等小型網(wǎng)絡自身的技術局限,在異構網(wǎng)絡中,用戶切換容易造成較高的時延和切換失敗率等問題,該算法的解決方案主要包含以下兩點:1、通過劃分網(wǎng)絡參數(shù)層次來降低算法復雜度,隨后通過多參數(shù)判決算法優(yōu)化網(wǎng)絡選擇排序。2、針對家庭基站等小型網(wǎng)絡自身發(fā)射功率低,覆蓋半徑小的特點,生成額外的速度準入機制,提高切換的成功率。仿真結果表明,改進之后的算法提高了切換的成功率,優(yōu)化了系統(tǒng)的切換性能。其次,本文提出一種改進的基于自優(yōu)化網(wǎng)絡機制的單步調(diào)試切換算法�，F(xiàn)有的異構網(wǎng)絡切換算法大多片面于單一的切換性能指標,但在實際環(huán)境中,各系統(tǒng)指標總是互相影響的,所以應在考量全局性能的基礎上,有側重地降低一些顯著影響系統(tǒng)通話質(zhì)量的指標。該算法主要包括以下兩點:1、通過結合上文提及的層次切換算法,在優(yōu)化系統(tǒng)準入控制的同時,采樣用戶切換期間的掉話率,切換失敗率以及乒乓切換率,為單步調(diào)試機制提供依據(jù)。2、單步調(diào)試機制通過分析各切換性能,更新系統(tǒng)切換參數(shù),反饋到切換判決系統(tǒng),實現(xiàn)系統(tǒng)切換參數(shù)的動態(tài)調(diào)整,提高切換成功率。此機制既有利于前期的網(wǎng)絡選擇,又有利于后期的性能調(diào)試,從而實現(xiàn)全鏈路的性能優(yōu)化。仿真結果表明該切換算法能夠顯著提高系統(tǒng)整體切換性能,同時減少性能優(yōu)化所需時間。
[Abstract]:With the rapid development of communication network, users have higher and higher requirements for network performance, and multi-network convergence can significantly improve the performance of the system. Therefore, heterogeneous wireless networks are becoming one of the trends of communication development in the future. At the same time, the introduction of small network technologies, such as home base stations, puts forward higher technical requirements for heterogeneous network handoff systems. In this paper, an improved handoff algorithm is proposed to overcome the complexity of admission criteria and the high failure rate of wireless links in heterogeneous networks. Firstly, an improved hierarchical handoff algorithm based on speed sensing mechanism is proposed. Most of the existing handoff algorithms in heterogeneous networks do not consider the technical limitations of small networks such as cell base stations. In heterogeneous networks, user handoff is prone to cause high delay and handover failure rate. The solution of the algorithm mainly includes the following two points: 1, reducing the complexity of the algorithm by dividing the layer of network parameters, and then optimizing the sorting of network selection by multi-parameter decision algorithm, aiming at the low transmitting power of small networks such as home base stations, etc. With small coverage radius, additional speed access mechanism is generated to improve the success rate of handoff. Simulation results show that the improved algorithm improves the success rate of handoff and optimizes the performance of the system. Secondly, an improved single step debugging handoff algorithm based on self-optimization network mechanism is proposed. Most of the existing handoff algorithms in heterogeneous networks are one-sided to a single handoff performance index, but in the actual environment, the system indexes always affect each other, so we should consider the overall performance of the system. Focus on reducing some of the significant impact on the quality of the system call indicators. The algorithm mainly includes the following two points: 1. By combining the hierarchical handoff algorithm mentioned above, the system access control is optimized, and the drop rate, the handoff failure rate and the ping-pong handoff rate during the switching period are sampled. By analyzing the switching performance, updating the system switching parameters and feedback to the switching decision system, the single-step debugging mechanism realizes the dynamic adjustment of the system switching parameters and improves the switching success rate. This mechanism is not only conducive to the early network selection, but also conducive to the later performance debugging, so as to achieve the performance optimization of the whole link. Simulation results show that the proposed handoff algorithm can significantly improve the overall performance of the system and reduce the time required for performance optimization.
【學位授予單位】：重慶郵電大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN92
本文編號：2214422
[Abstract]:With the rapid development of communication network, users have higher and higher requirements for network performance, and multi-network convergence can significantly improve the performance of the system. Therefore, heterogeneous wireless networks are becoming one of the trends of communication development in the future. At the same time, the introduction of small network technologies, such as home base stations, puts forward higher technical requirements for heterogeneous network handoff systems. In this paper, an improved handoff algorithm is proposed to overcome the complexity of admission criteria and the high failure rate of wireless links in heterogeneous networks. Firstly, an improved hierarchical handoff algorithm based on speed sensing mechanism is proposed. Most of the existing handoff algorithms in heterogeneous networks do not consider the technical limitations of small networks such as cell base stations. In heterogeneous networks, user handoff is prone to cause high delay and handover failure rate. The solution of the algorithm mainly includes the following two points: 1, reducing the complexity of the algorithm by dividing the layer of network parameters, and then optimizing the sorting of network selection by multi-parameter decision algorithm, aiming at the low transmitting power of small networks such as home base stations, etc. With small coverage radius, additional speed access mechanism is generated to improve the success rate of handoff. Simulation results show that the improved algorithm improves the success rate of handoff and optimizes the performance of the system. Secondly, an improved single step debugging handoff algorithm based on self-optimization network mechanism is proposed. Most of the existing handoff algorithms in heterogeneous networks are one-sided to a single handoff performance index, but in the actual environment, the system indexes always affect each other, so we should consider the overall performance of the system. Focus on reducing some of the significant impact on the quality of the system call indicators. The algorithm mainly includes the following two points: 1. By combining the hierarchical handoff algorithm mentioned above, the system access control is optimized, and the drop rate, the handoff failure rate and the ping-pong handoff rate during the switching period are sampled. By analyzing the switching performance, updating the system switching parameters and feedback to the switching decision system, the single-step debugging mechanism realizes the dynamic adjustment of the system switching parameters and improves the switching success rate. This mechanism is not only conducive to the early network selection, but also conducive to the later performance debugging, so as to achieve the performance optimization of the whole link. Simulation results show that the proposed handoff algorithm can significantly improve the overall performance of the system and reduce the time required for performance optimization.
【學位授予單位】：重慶郵電大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN92
【參考文獻】
相關期刊論文 前4條
1 肖清華;;基于準入控制的LTE負載均衡算法[J];現(xiàn)代電信科技;2014年04期
2 張臨;陳勇;林小雅;;基于SON的LTE HeNB切換參數(shù)優(yōu)化算法研究[J];信息通信;2013年10期
3 覃武凌;彭木根;張洪巖;紀曉東;;LTE-Advanced系統(tǒng)中的移動負載均衡算法研究[J];移動通信;2013年14期
4 徐興;葉梧;馮穗力;;基于多優(yōu)先級時延預留的呼叫接入控制機制[J];北京郵電大學學報;2007年01期
，本文編號：2214422
本文鏈接：http://sikaile.net/kejilunwen/xinxigongchenglunwen/2214422.html
最近更新
教材專著
