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本文对无线ATM通信网CBR业务定时信息的恢复技术进行了研究。提出了异步剩余时间标签(ARTS)技术,并通过码速调整改善收端的CBR业务时钟性能,给出了实现方案。同时,提出采用ARTS FIFO吸收定时信息的延时抖动。由于无线ATM通信网的误码率较大,其信元丢失率较高,本文在分析RTS的多重码速调整特性基础上,还提出了利用已收到相邻ARTS之间的差值规律来估计丢失的ARTS的新方法。理论计算和模拟结果表明,本文提出的定时信息恢复技术完全适用于无线ATM通信网,并且与B-ISDN/ATM采用的SRTS技术有较好的兼容性。
In this paper, the wireless ATM communication network CBR service timing information recovery techniques are studied. Asynchronous residual time stamping (ARTS) technology is proposed, and the performance of the receiving end CBR service clock is improved by the code speed adjustment. The implementation scheme is given. At the same time, it proposes delay jitter using ARTS FIFO to absorb timing information. Because of the high bit error rate of wireless ATM communication network, the cell loss rate is high. Based on the analysis of RTS multiple code rate adjustment characteristics, this paper also proposes to use the difference rule of the received adjacent ARTS New Method to Estimate Lost ARTS. The theoretical calculation and simulation results show that the proposed timing information recovery technology is fully applicable to wireless ATM communication network and has good compatibility with the SRTS technology adopted by B-ISDN / ATM.