苹果软件系列产品介绍
2012-07-26 09:44
411 查看
It requires at the minimum an new data indicator (NDI), a redundancy version(RV) and a HARQ process number to perform a HARQ combining for a transport block.
In Sect. 5.3.2.1 of TS36.321, it’s stated that “in case of BCCH a dedicated broadcast HARQ process is used”. So is this “ broadcast HARQ process” also used for paging/PCCH?
Considering redundancy version, it is stated in Sect. 7.1.7.3 that the RV shall set to 0 when the DCI 1C is scrambled by P-RNTI, and that the RV is set according to SI window for DCI 1C scrambled by SI-RNTI, implying that Chase and IR combining are possible for SI-RNTI while only Chase combining is applicable for P-RNTI. For DCI 1A, eNodeB is able to set RV as needed.
For the HARQ process ID, there’s no “HARQ process number” field in DCI 1C, and for DCI 1A with P-RNTI, the “HARQ process number” field is reserved, as stated in TS36.212.
As for NDI, there’s no NDI field for DCI 1C. Though there’s NDI filed in DCI 1A, it is defined clearly that the NDI bit is reserved for P-RNTI in Sect. 5.3.3.1.3 of TS36.212. Since there’s no NDI for P-RNTI, with DCI 1C or 1A, it is not applicable for a HARQ combining for Paging.
In summary, RV is available for transport block for PCCH, but either of HARQ process ID and NDI is available for PCCH. So it is clear that HARQ combining is not applicable for Paging, under the framework of 3GPP specification.
As to system information broadcast/BCCH, HARQ process ID and NDI are also not available in the downlink control information, namely DCI 1C or 1A. However, an extra and special HARQ process is explicitly defined for BCCH in TS36.321, named broadcast HARQ process. Furthermore, the NDI for BCCH transport block is determined from the SI scheduling information. There extra settings make it possible to perform HARQ combining (even incremental redundancy!) for BCCH.
In Sect. 5.3.2.1 of TS36.321, it’s stated that “in case of BCCH a dedicated broadcast HARQ process is used”. So is this “ broadcast HARQ process” also used for paging/PCCH?
Considering redundancy version, it is stated in Sect. 7.1.7.3 that the RV shall set to 0 when the DCI 1C is scrambled by P-RNTI, and that the RV is set according to SI window for DCI 1C scrambled by SI-RNTI, implying that Chase and IR combining are possible for SI-RNTI while only Chase combining is applicable for P-RNTI. For DCI 1A, eNodeB is able to set RV as needed.
For the HARQ process ID, there’s no “HARQ process number” field in DCI 1C, and for DCI 1A with P-RNTI, the “HARQ process number” field is reserved, as stated in TS36.212.
As for NDI, there’s no NDI field for DCI 1C. Though there’s NDI filed in DCI 1A, it is defined clearly that the NDI bit is reserved for P-RNTI in Sect. 5.3.3.1.3 of TS36.212. Since there’s no NDI for P-RNTI, with DCI 1C or 1A, it is not applicable for a HARQ combining for Paging.
In summary, RV is available for transport block for PCCH, but either of HARQ process ID and NDI is available for PCCH. So it is clear that HARQ combining is not applicable for Paging, under the framework of 3GPP specification.
As to system information broadcast/BCCH, HARQ process ID and NDI are also not available in the downlink control information, namely DCI 1C or 1A. However, an extra and special HARQ process is explicitly defined for BCCH in TS36.321, named broadcast HARQ process. Furthermore, the NDI for BCCH transport block is determined from the SI scheduling information. There extra settings make it possible to perform HARQ combining (even incremental redundancy!) for BCCH.
相关文章推荐
- 苹果软件系列产品介绍
- 苹果软件系列产品
- PartyOK派对游戏系列产品介绍
- SkyLine——3DGIS三维地理信息系统软件产品介绍
- 产品线工程:软件产品线-规模化产品开发介绍
- 软件工程系列-介绍, 软件工程的那些事
- 苹果的产品开发流程介绍:带你认识世界最好的设计公司
- 从概率看苹果系列设备及其它触摸类产品安全问题
- ISTQB AL-TM连载系列02:确定软件产品发布中的测试因素
- Xcode 5.0 苹果系统软件开发环境(IDE)工具介绍
- TI C6000系列DSP的流水线介绍和软件流水优化
- 微软禁止员工购买苹果Mac & iPad系列产品
- 新一代软件集成开发平台——Trufun Kant Studio 2008产品介绍
- Magical系列软件产品项目启动了
- 软件产品线-规模化产品开发介绍
- 苹果系列产品文件共享神器
- 大数据架构师基础:hadoop家族,Cloudera系列产品介绍
- 【读图】苹果产品全系列海报 1976-2012纪年表
- 远程协助软件中的九款免费产品介绍