In fading and shadowing channels, error control techniques are used for the reliable transmission. As a combination of forward error correction and automatic repeat request ( ARQ ), Hybrid ARQ ( HARQ ) protocol provides both of the advantages. 为了保证数据在无线衰落信道条件下的可靠传输,产生了联合前向纠错编码(FEC)与自动请求重传(ARQ)的混合ARQ(HARQ)技术。
Hybrid automatic repeat request ( HARQ ) technology which combines the advantage of forward error correction ( FEC ) and feedback repeat request ( ARQ ) can improve the system reliability by using retransmission and error correction mechanisms. 混合自动重传请求(HARQ)技术结合了前向纠错(FEC)和反馈重发(ARQ)这两类方法的优点,利用重传和纠错机制,提高系统的可靠性。
So far there are two kinds of technique used for error control : FEC ( Forward Error Correction ) and ARQ ( Automatic Repeat Request ). 迄今为止,有两种主要的差错控制机制:前向纠错编码(FEC,ForwardErrorCorrection)和自动重传请求(ARQ,AutomaticRepeatreQuest)。
This protocol uses a combination of high efficiency Forward Error Correction ( FEC ) and integrated Automatic Repeat reQuest ( ARQ ) in application layer, can effectively controls errors, guarantee high efficiency reliable data transmission. 该协议通过在应用层运用了高效的前向纠错(FEC)和集中式的自动重传(ARQ)相结合的差错控制机制,有效地控制了差错,保证了数据的高效可靠传输。
According to the multimedia service type difference in the wireless ATM network, we propose the corresponding error correction plan : When the multimedia service having the strict delay request is transmitted, we use the Forward Error Corretion technology; 根据无线ATM网络所传输的多媒体业务类型的不同,我们提出了相应的差错控制方案:对传输时延有严格要求的多媒体业务,我们采用前向纠错技术FEC;