[信息与通信]GPRS测试分析.ppt

GPRS测试分析 网优中心 西区优化 主要内容 IP Address Test Procedure GPRS attach PDP activate Ping FTP Layer 3 signaling Idle mode connection setup packet transfer Idle mode System information 13 paging request System information 13BCCH Change MarkSI Change FieldRACNetwork Control OrderGPRS cell optionsGPRS Power control  Connection setup Channel request immediate assignment Packet resource request packet downlink assignment packet uplink assignment Packet transfer Packet Downlink Ack/Nack Packet Uplink Ack/Nack Downlink PDCH report Uplink PDCH report RLC/MAC Block 设备故障 故障情况下进行FTP下载的RLC吞吐量 故障处理前后RLC吞吐量的对比 GSR6对于GPRS的新feature Overlapping TBF Interleaving TBF Enhanced One Phase Access Multiple Carriers Per Cell NC1 NC2 增强算法： Overlapping TBF 增强算法 - Interleaving TBF Block-by-block multiplexing of RLC blocks from different mobiles into a common GPRS timeslot 单时隙多用户的情况 Current Access vs. 1-Phase Access 五种情况 没有接收尝试 尝试但失败 control block data not the last data the last NSAPI：SNDCP session application port identity PDP LLC SAPI:3, 5, 9, 11 LLC Service Access Point Identifier QoS:在HLR中定义的是 delay class,1-4,3最高，4是best effort precedence class,1 high, 2 normal, 3 low reliability class, 3 RLC acknowledge throughput class, Gi interface radio priority 不是QoS中定义的，对于data有4个level，对于signaling有1个level CS的使用率是在RF层完成的，不考虑使用者。 NC: Cell reselection behavior of mobile station. One of NC0, NC1, NC2: NC0: MS reselection, no measurement reports NC1: MS reselection, measurement reports NC2: Network reselection See GSM 05.08, ch. 10.1.4. NMO: Handling of paging in the network I: All paging on GPRS channels; Gs signaling interface present II: All paging on PCH; no Gs III: All circuit-switched paging on PCH, all packet-switched paging on PPCH; no Gs 默认设定中还有RLP throughput即HSCSC的吞吐量； App throughput和Session App. Mean throughput必需由内部程序执行才可以显示。 C/I由BER计算得到。 BER是RF层的，CS4时不能测量BER。 接收到的456bit解码后，将此信息按原先的生成多项式进行编码，得到456bit的数据，两个456bit比较，不同的bit，就是出错的bit(当误码不是很高时是正确的) FER是RF层的，所有BCS(block check sequence)不正确的bloc