计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2015年
10期
79-83,122
,共6页
彭宇珏%董育宁%李健
彭宇玨%董育寧%李健
팽우각%동육저%리건
通用移动通信系统%选择性自动请求重发%流媒体%服务质量(QoS)%内容感知
通用移動通信繫統%選擇性自動請求重髮%流媒體%服務質量(QoS)%內容感知
통용이동통신계통%선택성자동청구중발%류매체%복무질량(QoS)%내용감지
Universal Mobile Telecommunications System(UMTS)%selective ARQ%streaming media%Quality of Service (QoS)%content aware
针对UMTS(Universal Mobile Telecommunications System)无线接入网带宽受限、延时大、抖动大的特点,研究了视频业务的QoS(Quality of Service)保障机制问题。提出的内容感知选择性ARQ(Automatic Retransmis-sion reQuest)方法改进了原有传输模式下RNC(Radio Network Controller)和UE(User Equipment)间的ARQ机制, RNC根据视频业务数据的内容类型和时延要求,自适应地为不同类型的视频数据设置不同的最大重传次数,实现差异化服务。仿真结果表明,提出的方法能够提高视频传输质量,同时满足实时性要求。
針對UMTS(Universal Mobile Telecommunications System)無線接入網帶寬受限、延時大、抖動大的特點,研究瞭視頻業務的QoS(Quality of Service)保障機製問題。提齣的內容感知選擇性ARQ(Automatic Retransmis-sion reQuest)方法改進瞭原有傳輸模式下RNC(Radio Network Controller)和UE(User Equipment)間的ARQ機製, RNC根據視頻業務數據的內容類型和時延要求,自適應地為不同類型的視頻數據設置不同的最大重傳次數,實現差異化服務。倣真結果錶明,提齣的方法能夠提高視頻傳輸質量,同時滿足實時性要求。
침대UMTS(Universal Mobile Telecommunications System)무선접입망대관수한、연시대、두동대적특점,연구료시빈업무적QoS(Quality of Service)보장궤제문제。제출적내용감지선택성ARQ(Automatic Retransmis-sion reQuest)방법개진료원유전수모식하RNC(Radio Network Controller)화UE(User Equipment)간적ARQ궤제, RNC근거시빈업무수거적내용류형화시연요구,자괄응지위불동류형적시빈수거설치불동적최대중전차수,실현차이화복무。방진결과표명,제출적방법능구제고시빈전수질량,동시만족실시성요구。
The features of UMTS radio access network is reviewed and the issue of QoS guarantee of video services is studied. On the basis of the ARQ mechanism between RNC and UE, a modified content aware selective ARQ scheme is proposed. RNC adaptively sets different maximum retransmission limits for different video data packets according to their content types and the delay requirements. Simulation results show that the proposed ARQ scheme can improve the video quality in UMTS and meet the delay requirement.