CAJ | 학술논문

针对无线多媒体传感器网络(WMSN)中多对一通信时产生的网络拥塞问题，提出了一种自适应的 WSMN网络拥塞控制算法ACCP。通过结合速率控制和资源调度，并采用分簇的网络结构，根据簇首及簇内的拥塞指标，来分别启动对应的拥塞控制机制：当簇首发生短时间拥塞时，就启动属于资源调度的网络内存储管理机制，来暂时减缓网络内过多数据包；但当簇中的存储节点也无法容纳过量的数据包时，速率控制就启动，让流量减缓下来，并且只调整数据实时性要求较低的数据流的速率，以达到控制流量、减缓甚至消除网络拥塞的目的。仿真结果显示：ACCP在传送速率不同下，可以比InS、HCCP更有效的控制网络拥塞的情况，而在比较缓存容量不同的情况下，虽然ACCP只比 HCCP能够稍微改善网络拥塞的情况，但却能够大幅度改善InS的数据包丢失率。
침대무선다매체전감기망락(WMSN)중다대일통신시산생적망락옹새문제，제출료일충자괄응적 WSMN망락옹새공제산법ACCP。통과결합속솔공제화자원조도，병채용분족적망락결구，근거족수급족내적옹새지표，래분별계동대응적옹새공제궤제：당족수발생단시간옹새시，취계동속우자원조도적망락내존저관리궤제，래잠시감완망락내과다수거포；단당족중적존저절점야무법용납과량적수거포시，속솔공제취계동，양류량감완하래，병차지조정수거실시성요구교저적수거류적속솔，이체도공제류량、감완심지소제망락옹새적목적。방진결과현시：ACCP재전송속솔불동하，가이비InS、HCCP경유효적공제망락옹새적정황，이재비교완존용량불동적정황하，수연ACCP지비 HCCP능구초미개선망락옹새적정황，단각능구대폭도개선InS적수거포주실솔。
Network congestion produced by many to one communication is a crucial problem in WMSN.In this paper,an adaptive congestion control protocol (ACCP)is presented.Through the combination of rate control and resource scheduling,the cluster-base structure is used to start the corresponding congestion control mechanism according to the cluster head and its congestion index.When the cluster head is conges-ted for a short time,the network memory management mechanism belonging to resource scheduling will start to suspend too much packets in the network.When the storage node is unable to accommodate exces-sive packets,the rate control will start to slow down the network traffic.The simulation results show that the ACCP is more effective than InS,HCCP in controlling the network congestion in the case of transfer rate changing.Though the ACCP can only improve network congestion just a little better than HCCP un-der the condition of cache capacity changing,the packet loss of InS is improved significantly.