基于传输速率自适应的动态带宽分配算法

doi:10.3969/j.issn.1000-436x.2014.05.004

Abstract

Abstract:

A dynamic bandwidth allocation algorithm was proposed based on the transmission rate adaptation to guaran-tee the quality of service (QoS) for multi-service in heterogeneous wireless network. According to the proposed transmis-sion rate priority decision model, an optimal bandwidth reallocation matrix was obtained by dynamically adjusting users' transmission rates to maximize the utility function of entire heterogeneous network under the transmission rate QoS re-quirements and capacity constraints. The adaptive bandwidth reallocation problem was formulated as an optimal problem and a dynamic optimal iterative procedure was used to adjust adaptively users' transmission rates to further maximize this utility function. The results of theoretical analysis and numerical simulation show that the proposed algorithm can maxi-mize the network utility function and reduce the new calls blocking probability as well as guaranteeing the transmission rate and QoS requirements.

Key words: heterogeneous wireless network, transmission rate adaptation, bandwidth reallocation, utility function, blocking probability

Geng Chen,Wei-wei XIA,Lian-feng SHEN. Dynamic bandwidth allocation algorithm based on transmission rate adaptation[J]. Journal on Communications, 2014, 35(5): 25-32.

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因子	q¹(k)	q²(k)	…	q^T(k)
q¹(k)	a_k,11	a_k,12	…	a_k,1T
q²(k)	a_k,21	a_k,22	…	a_k,2T
…	…	…	…	…
q^T(k)	a_k,T1	a_k,T2	…	a_k,TT

业务k	传输速率QoS R_ns(m _m)/(kbit·s^-1)	传输的频η_ns(m, k_m)谱效率	传输优先级
	1024
1	512	1.521	3
	256
2	512 256	1.521	1
3	256	112	2

网络容量	网络容量取值/(Mbit·s^-1)	网络中的用户数
C₁	20	40
C₂	2	3
C₃	15	0～60

Dynamic bandwidth allocation algorithm based on transmission rate adaptation

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