CN102724018A - 无线发射/接收单元、方法和无线网络设备 - Google Patents
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Abstract
本发明公开了一种无线发射/接收单元(WTRU)、一种方法和一种无线网络设备。所述WTRU包括:处理器,被配置成在上行链路信道上以定期间隔发送信道质量指示(CQI);其中所述处理器还被配置成针对与所述WTRU相关联的无线电网络临时标识(RNTI)监控下行链路信道;其中所述处理器还被配置成响应于检测到与所述WTRU相关联的所述RNTI,确定无线网络是否正在请求所述WTRU发送CQI;以及其中所述处理器还被配置成响应于确定所述无线网络请求了所述WTRU发送所述CQI,发送所述CQI到所述无线网络。
Description
本申请为2007年10月19日提交的、名称为“经由共享信道发送信道质量指示的方法和设备”的中国专利申请200780039483.4的分案申请。
技术领域
本发明涉及无线通信。
背景技术
在通用陆地无线电接入网络(UTRAN)中的无线发射/接收单元(WTRU)可以处于空闲状态或连接状态。当WTRU处于连接状态时,根据WTRU的移动性和活动性,UTRAN可以命令WTRU在Cell_PCH、URA_PCH、Cell_FACH和Cell_DCH状态之间转换。在WTRU和UTRAN之间的用户界面通信只在当WTRU具有对UTRAN的无线电资源控制(RRC)连接时是可能的。
在上行链路和下行链路上,专用信道对Cell_DCH状态分类。在WTRU端,这对应着连续的传输和接收并且可能正需要用户功率需求。
如在第三代合作伙伴项目(3GPP)的版本6中所定义的,Cell_FACH状态不使用专用信道,并因而允许以较低的上行链路和下行链路吞吐量为代价而更好的功率消耗。在Cell_FACH状态,当下行链路通信是通过映射到第二公共控制物理信道(S-CCPCH)的共享传输信道(如前向接入信道(FACH))时,上行链路通信通过随机接入信道(RACH)被达到。Cell_FACH状态适合信令业务,(如小区更新和UTRAN注册区域(URA)更新消息的传输),并且适合需要非常低的上行链路吞吐量的应用。
当处于Cell_FACH状态时,WTRU可以根据测量控制信息中的指定来执行信号测量和/或业务量测量(TVM)。信号测量被WTRU用于小区重选。TVM在测量报告中被报告给UTRAN,该测量报告根据在测量控制信息中指定的准测。测量报告经由RACH被发送。
RACH基于在需求指示的时隙Aloha机制。在发送RACH消息前,WTRU通过在随机选择的接入时隙发送短前同步码(由随机选择的特征序列组成)来尝试获得信道。在传输RACH前同步码后,WTRU等待来自UTRAN的捕获指示。如果没有接收到捕获指示,WTRU为RACH前同步码斜坡式升高发射功率并重传RACH前同步码(即在选择的接入时隙发送随机选择的特征)。如果接收了捕获指示,则WTRU已经有效地获得了信道并可能传输RACH消息。RACH前同步码的初始功率基于开环功率控制技术被设置,并且斜坡式升高机制被用于进一步更好地调整WTRU的发射功率。
已经建议在Cell_FACH状态使用高速下行链路分组接入(HSDPA)。HSDPA是被包括在第三代合作伙伴项目(3GPP)版本5的规范中的特征。HSDPA运行在Cell_DCH状态。HSDPA通过使用三个关键的概念:自适应调制编码(AMC)、使用混合自动重复请求(HARQ)方案的重传和节点-B调度,来使得更好地使用下行链路共享容量。
每两(2)毫秒,基于节点-B从WTRU采集的信息和下行链路缓冲的状态,节点-B调度在高速下行链路共享信道(HS-DSCH)上的传输。另外,节点-B通过调整MCS、传输块大小等来剪辑特定WTRU的传输比特率。节点-B可以以较高数据速率向那些感知有利的信道状况的WTRU发射,并以较低的数据速率向那些感知不利的信道状况(如在小区边缘)的WTRU发射。
对于HSDPA运行,节点-B需要来自WTRU的信道质量指示(CQI)和肯定应答(ACK)/否定应答(NACK)反馈。CQI是提供WTRU可以支持的最大MCS的表格的索引。CQI由UTRAN决定的周期被周期性地发送。ACK/NACK反馈用于HARQ进程。ACK/NACK信息仅被提供响应于正在下行链路接收的分组。
在3GPP版本6规范中,CQI和ACK/NACK信息经由高速专用物理控制信道(HS-DPCCH)被传输。每一WTRU被分配独立的HS-DPCCH并因此WTRU能够很容易地提供反馈信息。此外,HS-DPCCH是使用到上行链路专用物理控制信道(DPCCH)的偏移被功率控制,在此执行的是闭环功率控制。在HS-DPCCH上的信息被很重地(heavily)编码以协助检测。由于越来越多的WTRU使用HSDPA,反馈控制信道的数量增加。即使这些被功率控制,反馈信息可能引起上行链路噪声上升,从而减少其他上行链路传输的可用容量。
如果在Cell_FACH状态使用HSDPA,主要的问题是缺乏传送CQI和ACK/NACK信息的专用上行链路信道。没有CQI和ACK/NACK信息,HSDPA的优势被大大减小。3GPP版本6规范没有为优化的MCS选择和在Cell_FACH状态的HS-DSCH调度提供支持。
因而,提供一种经由在Cell_FACH状态的共享信道提供CQI信息的方法和设备将是十分理想的。
发明内容
本发明公开了一种无线发射/接收单元(WTRU),该WTRU包括:处理器,被配置成在上行链路信道上以定期间隔发送信道质量指示(CQI);其中所述处理器还被配置成针对与所述WTRU相关联的无线电网络临时标识(RNTI)监控下行链路信道;其中所述处理器还被配置成响应于检测到与所述WTRU相关联的所述RNTI,确定无线网络是否正在请求所述WTRU发送CQI;以及其中所述处理器还被配置成响应于确定所述无线网络请求了所述WTRU发送所述CQI,发送所述CQI到所述无线网络。
本发明公开了一种方法,该方法包括:无线发射/接收单元(WTRU)在上行链路信道上以定期间隔发送信道质量指示(CQI);所述WTRU针对与所述WTRU相关联的无线电网络临时标识(RNTI)监控下行链路信道;所述WTRU响应于检测到与所述WTRU相关联的所述RNTI,确定无线网络是否正在请求所述WTRU发送CQI;以及所述WTRU响应于确定所述无线网络请求了所述WTRU,发送所述CQI到所述无线网络。
本发明公开了一种无线网络设备,该无线网络设备包括:处理器,被配置成在上行链路信道上以定期间隔从无线发射/接收单元(WTRU)接收信道质量指示(CQI);其中所述处理器还被配置成在下行链路信道上发送请求所述WTRU发送CQI的请求;其中所述请求与所述WTRU所关联的无线电网络临时标识(RNTI)一起被发送;其中所述处理器还被配置成响应于所述请求从所述WTRU接收所述CQI。
本发明公开了一种无线发射/接收单元(WTRU),该WTRU包括:处理器,该处理器被配置成在上行链路信道上以定期间隔传送信道质量指示(CQI);其中所述处理器还被配置成针对与所述WTRU相关联的无线电网络临时标识(RNTI)监控下行链路信道;其中所述处理器还被配置成响应于检测与所述WTRU相关联的所述RNTI,确定是否有无线网络正在请求所述WTRU传送CQI;以及其中所述处理器还被配置成响应于确定所述无线网络请求了所述WTRU传送所述CQI,传送所述CQI到所述无线网络。
本发明还公开了一种方法,该方法包括:无线发射/接收单元(WTRU)在上行链路信道上以定期间隔传送信道质量指示(CQI);所述WTRU针对与所述WTRU相关联的无线电网络临时标识(RNTI)监控下行链路信道;所述WTRU响应于检测与所述WTRU相关联的所述RNTI,确定是否有无线网络正在请求所述WTRU传送CQI;以及所述WTRU响应于确定所述无线网络请求了所述WTRU,传送所述CQI到所述无线网络。
本发明还公开了一种无线网络设备,该无线网络设备包括:处理器,被配置成在上行链路信道上以定期间隔从无线发射/接收单元(WTRU)接收信道质量指示(CQI);其中,所述处理器还被配置成在下行链路信道上传送所述WTRU传送CQI的请求;其中所述请求和与所述WTRU相关联的无线电网络临时标识(RNTI)一起被发送;以及其中所述处理器还被配置成响应于所述请求从所述WTRU接收所述CQI。
本发明公开了一种当WTRU处于Cell_FACH状态且没有为该WTRU分配专用信道时,经由共享或公共信道发送CQI的方法和设备。WTRU执行至少一个参数的测量并基于该测量生成CQI。然后,WTRU经由RACH传输所述CQI。可以使用RACH前同步码传输CQI。多个特征序列可以被划分为多个组。WTRU可以根据CQI选择一个组并在所选择的组中的特征序列中随机选择特征序列以用于传输RACH前同步码。CQI可以被附加至前同步码。CQI经由RACH消息的控制部分或数据部分被传输。RACH消息可以为包括CQI传输的RRC测量报告。CQI报告可以由HS-SCCH传输的成功解码被触发。
附图说明
以下关于优选实施方式的描述中可以更详细地了解本发明,这些优选实施方式是以实施例的方式给出的,并且可以结合附图加以理解:
图1是实例WTRU的框图;
图2显示了附加在RACH前同步码末端的CQI;
图3显示了被携带在RACH控制消息中的CQI的实例;
图4显示了被携带在RACH消息的RACH报头中的CQI的实例;
图5显示了实例两分层CQI结构;以及
图6显示了CQI报告触发的实例。
具体实施方式
下文引用的术语“WTRU”包括但不局限于用户设备(UE)、移动站、固定或移动用户单元、寻呼机、蜂窝电话、个人数字助理(PDA)、计算机或能在无线环境中工作的其它任何类型的用户设备。下文引用的术语“节点-B”包括但不局限于基站、站点控制器、接入点(AP)或是能在无线环境中工作的其它任何类型的接口设备。
需要注意的是虽然将要描述的实施方式是关于3GPP高速下行链路分组接入(HSDPA),本发明可以应用到信道质量反馈信息需要经由共享/公共信道被传输的任何无线通信系统。
图1是实例WTRU 100的框图。WTRU 100包括测量单元102、CQI生成器104和收发信机106。需要注意的是图1中的WTRU 100是作为实例被提供的,而不是限制,并且WTRU 100可以包括任何其他常规的对无线传输和接收必要的处理组件。测量单元102执行至少一个预定参数的测量以提供由WTRU 100感知的信道质量的估计。
当WTRU 100处于Cell_FACH状态时,测量参数可以是下行链路传输信道的块差错速率(BLER)。高BLER可以被解释为下行链路传输率太高。测量参数可以是在下行链路参考信道(如公共导频信道(CPICH))上测量的路径损耗。在下行链路上的高路径损耗可以被解释为表明下行链路传输率太高的指示。测量参数可以是在捕获指示信道(AICH)接收捕获指示前需要的前同步码斜坡式升高的数量。例如,如果WTRU 100需要许多RACH前同步码传输功率斜坡式升高,或者如果RACH传输失败,WTRU 100可能解释为信道状况很差并且要求减少下行链路传输率。测量参数可以是在CPICH、高速共享控制信道(HS-SCCH)或任何其他下行链路参考信道上接收的功率。通过提供这一功率的指示,节点-B估计路径损耗并据此增加或降低下行链路传输率。测量参数可以是在任何下行链路参考信道(如CPICH)上测量的信噪比(SNR)的估计,其中噪声包括不能被WTRU消除的热噪声和来自邻近小区的干扰。测量参数可以是CPICH Ec/N0(即CPICH接收的信号码功率(RSCP)/接收的信号强度指示符(RSSI))或主公共控制物理信道(PCCPCH)RSCP被转换成的增加RSSI的HS-DPDCH测量。可替换地,HS-SCCH功率可以被测量。
基于(一个或多个)测量(即CQI是测量的被编码的版本),CQI生成器104输出CQI。一个或任何上述WTRU测量的结合可以被映射到CQI值(如到查找表的索引),并且经由将在下文详细描述的反馈机制的一个被发送到节点-B。CQI值可以被发送到RRC层用以在RRC层报告。CQI值可以在RRC层上被过滤。在执行映射时,WTRU 100也可以考虑其自身接收机能力以生成CQI。
CQI不必是测量的直接编码,但是也可以是WTRU基于其接收机设计和测量的数量来支持的传输块大小或最大数据率的估计(即CQI可以是WTRU为维持目标块差错率(BLER)可以支持的传输块大小或最大数据率的编码版本)。由WTRU支持的最大传输块大小或最大数据率被格式化并被编码到索引值(即CQI值)。
可替换地,CQI可以是基于测量的相对向上或向下命令。例如,相对向上/向下命令可以基于WTRU为维持目标BLER支持的传输块大小被生成。例如,WTRU 100决定信道质量很差并要求减少下行链路传输率到下一个较低级别。在这种情况下,控制的粒度可以多于一个步长(如向上3个级别,向下4个级别)。相对向上或向下命令可以指示在WTRU 100以足够的BLER接收的最大传输块大小的增加或降低,或者在信道上的测量值(如路径损耗)的增加或降低(如以dB为单位)。
CQI可以具有多分层结构。图5显示了实例两分层CQI结构。需要注意的是图5是作为实例被提供的,而不是限制,并且任何其他CQI结构可以被实施。在这一实例中,CQI值用五(5)个比特编码。前两个最高有效位(MSB)被作为粗CQI使用,并且三个最低有效位(LSB)被作为在每一粗CQI范围内的精CQI。经由RRC测量报告的CQI报告可以被用于发送粗CQI(慢更新),并且物理层(L1)程序可以被用于发送精CQI(快更新)。在慢改变信道状况下,粗CQI被使用,而当改变CQI的速率较快时,CQI可以经由基于L1CQI报告程序被报告。
一旦CQI被生成,收发信机106向节点-B传输CQI。由于在Cell_FACH状态没有分配到WTRU 100的专用控制信道,收发信机106经由RACH或任何其他需要WTRU在初始传输前首先获得的信道的基于争用的信道发送CQI信息。
CQI的传输提供了用于在HS-DPDCH上传输的新鲜和合适的链路性能预测符。当WTRU先前处于URA_PCH或Cell_PCH模式并且没有测量被执行而没有测量对UTRAN可用时,CQI可以被发送。当WTRU已经向UTRAN发送至少一个测量值但至今未接收任何下行链路传输时,CQI可以被报告。当WTRU已经接收传输一段时间但测量变为旧值时,CQI可以被报告。在后两种情况下,在HS-DSCH上需要的测量控制的数量被减少。
下文中公开了发送CQI的实施方式。根据第一个实施方式,WTRU 100使用RACH前同步码发送CQI信息。常规地,WTRU在多个特征序列中随机选择RACH前同步码特征序列。根据第一个实施方式,特征序列被划分为多个组。WTRU 100基于CQI选择一个组并随后在所选择的组的特征序列中随机选择特征序列。特征序列的选择不是完全随机的,而是依赖CQI。例如,如果两(2)比特CQI被使用并且总共16个特征序列被划分成四个组,每一个组具有四个独特的特征序列,CQI被用于选择四(4)个组中的一个,并且在所选择的组中的四个特征序列中的一个被随机选择。在节点-B解码特征序列时,节点-B交叉参考特征序列号码以决定组和被传输的CQI。
如果CQI索引的数量超过16,常规16比特前同步码特征序列可以从16被增加到2k(这里k>4),而并不是在每一前同步码重复所选择的特征序列256次,WTRU 100重复新的特征序列(256/(2k-4))次。
可替换地,CQI可以被附加到RACH前同步码的末端。图2显示了附加到RACH前同步码202末端的CQI 206。在这一实例中,RACH前同步码的传输包括16比特特征序列204的256次重复和CQI 206。当节点-B检测前同步码序列202时,节点-B重获在前同步码序列202末端的CQI 206并发送获取指示。当节点-B解码RACH消息时,WTRU标识(ID)可以被决定。可替换地,WTRU ID也可以被附加到前同步码末端。这允许在前同步码中发射所有需要的信息而不需要随后的RACH消息传输。
根据第二实施方式,CQI通过RACH消息的控制部分被发送。图3显示了实例RACH时隙格式。10ms RACH无线电帧300包括15个时隙302。每一时隙302包括被并行发射的数据部分310和控制部分320。常规地,控制部分320携带导频比特322和TFCI比特324。根据第二实施方式,CQI 326被包括在控制部分320。
根据第三实施方式,CQI通过RACH消息的数据部分310被发送。图4显示了RACH消息400中的实例RACH报头410和MAC服务数据单元(SDU)420。CQI 412被包括在RACH报头410中。为了在RACH报头410中包括CQI 412,物理层向MAC层(MAC-c/sh层)提供CQI 412,并且MAC层在MAC报头410中增加CQI 412。在物理层和MAC层之间的信令可以被实施,例如,通过修改的PHY-状态-IND(PHY-Status-IND)原语。
根据第四实施方式,CQI可以通过RRC消息(例如测量报告消息)被发送。CQI被发送到WTRU的RRC层以被包括在RRC消息中。在发送RRC消息前,CQI可选择地被RRC层过滤。
由于物理RACH(PRACH)的能力是优先的,定义了用于决定CQI的传输何时应被代替的规则。当WTRU具有MAC SDU以经由RACH传输时(即机会传输),WTRU传输CQI。如上所述的,CQI可以在RACH前同步码或RACH消息中被传输。
因为机会传输依赖在上行链路传输信息的需要,且该信息不必与下行链路传输相关,则该机会传输可能不是足够的。为了能在RACH上缺少上行链路传输时使能够有CQI报告,即使WTRU不必发送MAC SDU,该WTRU可以传输CQI(即CQI单传输)。TFCI字段可以被用于用信号告知节点-BRACH传输是CQI单传输。为了CQI单传输,CQI可以被附加到RACH前同步码,如图2所示,或在RACH消息的控制部分或数据部分被传输。
可替换地,可以为CQI的传输(即单CQI传输)定义触发判据。CQI周期性地被传输。一旦WTRU具有Cell_FACH状态的活动HSDPA连接时,WTRU周期性地发送CQI。WTRU持续地监控信道状况,并在定期间隔发送CQI。CQI报告的速率作为配置参数提供给WTRU。CQI以随机偏移被报告以减少在WTRU间的冲突的可能性。
节点-B可能选中CQI。例如,WTRU在接收下行链路的数据时传输CQI。如果节点-B没有新鲜的CQI信息,节点-B在这一初始下行链路传输上选择低MCS或根本不传输数据(因而减小干扰)。下行链路传输可以是在目的地指向WTRU的HS-SCCH上传输。在这种情况下,WTRU监控HS-SCCH,并当WTRU在下行链路的HS-SCCH传输上成功解码其地址(即HSDPA无线电网络临时标识(H-RNTI))时触发CQI的传输。
WTRU在信道状况的重大改变时发送CQI。当当前CQI(或平均CQI)和最后被报告的CQI之间的差别超过预定值时,WTRU传输CQI。WTRU(如RRC)被配置成具有CQI增量。每一次被测量的CQI值超过先前CQI值的大小为CQI增量且持续预定义的时间段时,触发CQI报告。
WTRU在Cell_FACH状态的HSDPA连接起始时刻时发送CQI。WTRU持续性地监控信道状况,但是在为HSPDA信道接收RRC连接建立消息之后,可以发送CQI。
CQI的范围可以以CQI阈值被划分成多个CQI级别,并且WTRU可以基于测量的(或过滤的)CQI与CQI阈值的比较来发送CQI。如果测量的(或过滤的)CQI越过CQI阈值(即改变CQI级别),并保持在新的CQI级别达一段预定时间,则触发CQI报告。图6说明了基于与CQI阈值的比较的CQI触发实例。需要注意的是图6被作为实例提供,而不是限制,并且CQI范围可以被划分为任何数目级别。在这个实例中,两个CQI阈值被配置并且CQI范围被划分为三个级别(CQI1、CQI2和CQI3)。初始的,测量的CQI属于CQI1级别。在时刻A,测量的CQI变化到第二级别CQI2。此时,设置定时器以触发CQI报告。测量的CQI保持在CQI2级别直到定时器终止,并且因而在定时器终止时触发CQI报告。在时刻B,测量的CQI变化到CQI1级别,并且又设置定时器。在定时器终止之前测量的CQI变化到CQI2级别。因而,此时不发送CQI。在时刻C,测量的CQI变化到CQI3级别,并且设置定时器。测量的CQI保持在CQI3级别直到定时器终止,并且在定时器终止时触发CQI报告。
可以基于特定WTRU动作触发CQI报告。例如。当WTRU变化到Cell_FACH状态时和/或在Cell_FACH、Cell_PCH和URA_PCH状态中的任一个的小区重选时,发送CQI。
CQI报告可以基于下行链路接收被触发(例如,当WTRU未能解码下行链路接收时被发送),并且CQI可以与RRC和/或无线电链路控制(RLC)ACK/NACK信息一起被发送。可以基于NACK计数调整CQI报告触发率。当NACK计数增加时报告速率被增加,并且当ACK计数增加时报告速率被降低。
当基于传输块BLER期望接收数据或控制信息而没有数据或控制信息(即HS-SCCH传输)被接收时,CQI报告可以基于HARQ BLER被触发。
CQI报告可以基于HS-SCCH接收而被触发。一旦WTRU成功解码HS-SCCH传输,WTRU期望在相关HS-PDSCH上的数据传输。在正确解码HS-SCCH传输后,如果WTRU不能恢复HS-PDSCH传输,CQI报告可以被触发。触发机制可以基于平均窗口,这样在N个观察中的M个发生上触发CQI报告。M和N可以是硬件编码的或网络可配置的。
可替换地,通过在观察窗口对成功的HS-SCCH传输的数目(K)计数,触发CQI报告。观察窗口在具有指示新的传输块的新的数据指示符的HS-SCCH传输的第一解码被启动。观察窗口应当足够的大以包括被每一传输的分组所期望的所有的重传。观察窗口应当在具有新的数据指示符的下一HS-SCCH传输到来时终止。当K小于在Cell_FACH上的为HSDPA配置的重传的最大数目时,触发CQI。K的值和观察窗口的大小是网络可配置的。触发可以基于平均窗口。
可替换地,在正确解码HS-SCCH传输并在L次重传后恢复在HS-PDSCH上的分组之后,CQI报告可以被触发,其中L小于在Cell_FACH上的为HSDPA配置的重传的最大数目。参数L可以是硬件编码的或网络可配置的。这一事件暗示当前的MCS太保守。触发可以基于平均窗口。
可以基于在HS-SCCH上的非活动性触发CQI报告。在解码HS-SCCH后,WTRU可以启动定时器并且如果直到所述定时器终止而WTRU未能接收任何HSDPA传输则触发CQI报告。定时器值可以是硬件编码的或网络可配置的。
前面提到的阈值和定时器值可以定义为系统信息的一部分。阈值和定时器值可以被重定义。为了减少下行链路信令负载以经由RRC信令指定这些新的阈值和定时器值,阈值和定时器值可以基于RRC和/或RLC ACK/NACK信息被WTRU自动地改变。阈值可以为线性的、不对称的或对数的(以其他为代价的对特定级别具有更好的粒度(granularity))。阈值可以基于HARQBLER被WTRU自动地改变。
处于Cell_FACH状态的下行链路控制信令可以控制CQI报告。下行链路控制信令可以通过HS-SCCH、MAC-hs报头、物理层信号、下行链路的L2控制信道等被发送。
经由RACH的CQI传输可以由较高层信令配置(如层3信令)。这种配置包括WTRU为传输RACH前同步码而使用的特征序列、时隙格式、WTRU为传输PRACH而使用的信道化和扰频码等等。
网络可以得知不同WTRU的能力,并决定WTRU是否有能力通过PRACH/RACH发送CQI。网络可以基于WTRU能力向WTRU发送配置参数。通过向BCCH中的常规系统信息块(SIB)增加多个新的信息元素(IE)、定义在BCCH的新的SIB(和调度)、或当HSDPA信道被建立时向RRC连接建立(RRC CONNECTION SETUP)消息增加IE,可以发送所述配置参数。新的测量可能落在“质量测量”目录下并应用到处于Cell_FACH状态的WTRU。所述配置参数包括发送CQI信息的方法(通过RACH、通过基于L1的途径、使用粗或精CQI等等)、CQI报告参数、CQI过滤系数(用于CQI值的层3过滤)、CQI报告判据(即定时器和阈值)等等。
为后向兼容性,节点-B可能被提醒WTRU正通过RACH发送CQI(即RACH传输包括CQI)。为了区别包括CQI的RACH传输,为CQI报告目的可以定义新的特征序列,或者保留特定的特征序列,以便节点-B区分包括CQI的RACH传输和不包括CQI的RACH传输。可替换地,为包括CQI的RACH传输,RACH消息的控制部分的TFCI字段(或RACH报头中的任何字段)的一个或多个值可以被保留。作为另一个替换,为包括CQI的RACH传输可以保留信道化和扰频码集合。
本发明适用于处于Cell_PCH和URA_PCH状态的WTRU。在这些状态,用于CQI计算的测量不必连续更新,但是可以在期望的转换到Cell_FACH状态的寻呼指示符信道(PICH)的接收上被监控。这将允许WTRU保持在功率节省状态,并且当需要时仅作出测量。
实施例
1.一种经由共享信道发送CQI的方法。
2.根据实施例1所述的方法,该方法包括WTRU执行至少一个参数的测量。
3.根据实施例2所述的方法,该方法包括WTRU基于所述测量而生成CQI。
4.根据实施例3所述的方法,该方法包括WTRU经由基于争用的上行链路共享信道来传输所述CQI。
5.根据实施例4所述的方法,其中,基于争用的上行链路共享信道是RACH。
6.根据实施例2-5中任一实施例所述的方法,其中用于生成CQI的测量是测量的BLER、下行链路参考信道上的路径损耗、下行链路参考信道上测量的SNR、CPICH Ec/N0、RACH传输所需要的RACH前同步码斜坡式升高的数量、以及下行链路参考信道上的接收功率中的至少一者。
7.根据实施例3-6中任一实施例所述的方法,其中所述CQI是WTRU为了维持目标BLER而支持支持的传输块大小和最大数据率中的至少一者的编码版本。
8.根据实施例3-6中任一实施例所述的方法,其中所述CQI是相对向上/向下命令。
9.根据实施例8所述的方法,其中相对向上/向下命令基于WTRU为了维持BLER支持的传输块大小和最大数据率中的至少一者而生成的。
10.根据实施例5-9中任一实施例所述的方法,其中CQI使用RACH前同步码被传输。
11.根据实施例10所述的方法,其中多个特征序列被划分成多个组,并且WTRU基于所述CQI选择一个组并在所选择的组的特征序列中随机选择特征序列以用于传输RACH前同步码。
12.根据实施例10所述的方法,其中所述CQI被附加到RACH前同步码。
13.根据实施例12所述的方法,其中WTRU标识被附加到RACH前同步码。
14.根据实施例5-9中任一实施例所述的方法,其中CQI经由RACH消息的控制部分和RACH消息的数据部分中的至少一者被传输。
15.根据实施例14所述的方法,其中TFCI字段中的至少一个值为包含CQI的RACH消息而保留,以便节点-B区分包括CQI的RACH传输和不包括CQI的RACH传输。
16.根据实施例5-9所述的方法,其中CQI与RACH MAC SDU一起被传输。
17.根据实施例16所述的方法,其中CQI经由PHY-Status-IND原语从物理层以信号发送到MAC层。
18.根据实施例4-17中任一实施例所述的方法,其中WTRU周期性地传输CQI。
19.根据实施例18所述的方法,其中CQI以随机偏移发送,以减少WTRU之间的冲突可能性。
20.根据实施例4-19中任一实施例所述的方法,其中WTRU响应于来自节点-B的下行链路传输而传输CQI。
21.根据实施例20所述的方法,其中节点-B为了下行链路传输而使用低调制编码方案(MCS)。
22.根据实施例20-21中任一实施例所述的方法,其中节点-B在下行链路传输上不传输数据。
23.根据实施例4-22中任一实施例所述的方法,其中当WTRU成功解码HS-SCCH传输时,该WTRU传输CQI。
24.根据实施例23所述的方法,其中所述WTRU经由RRC测量报告发送所述CQI。
25.根据实施例4-24中任一实施例所述的方法,其中当信道状况变化超过预定阈值达预定时间段时,所述WTRU传输所述CQI。
26.根据实施例4-25中任一实施例所述的方法,其中CQI范围被划分为具有CQI阈值的多个CQI级别,并且当所述CQI越过CQI阈值并保持在新的CQI级别达预定时间段时,所述CQI被发送。
27.根据实施例4-26中任一实施例所述的方法,其中当CQI处于CQI统计数值的特定区域时,WTRU传输CQI。
28.根据实施例4-27中任一实施例所述的方法,其中WTRU基于从节点-B接收的控制信息传输CQI。
29.根据实施例28所述的方法,其中控制信息经由HS-SCCH、MAC报头、物理层信令、层2控制信令、连接建立消息和BCCH中的至少一者而被传输到WTRU。
30.根据实施例5-29中任一实施例所述的方法,其中特征序列集合被保留以用于经由RACH传输CQI,以便节点-B区分包括CQI的RACH传输和不包括CQI的RACH传输。
31.根据实施例5-30中任一实施例所述的方法,其中信道化和扰频码集合被保留以用于经由RACH传输CQI,以便节点-B区分包括CQI的RACH传输和不包括CQI的RACH传输。
32.根据实施例4-31中任一实施例所述的方法,其中CQI经由在RRC层的RRC消息被发送。
33.根据实施例32所述的方法,其中所述CQI在所述RRC层上被过滤。
34.根据实施例3-33中任一实施例所述的方法,其中CQI具有多分层结构,以便粗CQI和精CQI被分开传输。
35.根据实施例34所述的方法,其中粗CQI经由RRC消息被发送,并且精CQI经由L1信令被发送。
36.根据实施例4-35中任一实施例所述的方法,其中CQI在处于Cell FACH状态的HSDPA连接的起始时刻被发送。
37.根据实施例4-36中任一实施例所述的方法,其中当WTRU变化到Cell_FACH状态时,CQI被发送。
38.根据实施例4-37中任一实施例所述的方法,其中当WTRU是Cell_FACH、Cell_PCH和URA_PCH状态中的一者时,CQI在小区重选时被发送。
39.根据实施例4-38中任一实施例所述的方法,其中当WTRU未能解码下行链路传输时,CQI被发送。
40.根据实施例39所述的方法,其中CQI报告率基于NACK和ACK的计数而被调整。
41.根据实施例4-40中任一实施例所述的方法,其中当期望接收数据或控制信息而没有数据或控制信息被接收时,所述CQI被发送。
42.根据实施例4-41中任一实施例所述的方法,其中在正确解码HS-SCCH传输后,如果WTRU不能恢复HS-PDSCH传输时则CQI被发送。
43.根据实施例4-42中任一实施例所述的方法,其中在观察窗口K次不成功解码HS-SCCH传输后,CQI被发送。
44.根据实施例4-43中任一实施例所述的方法,其中在正确解码HS-SCCH传输并在L次重传后恢复在HS-PDSCH上的分组之后,CQI被发送。
45.根据实施例4-44中任一实施例所述的方法,其中在解码HS-SCCH传输后,如果WTRU未能接收任何HSDPA传输达预定时间段,则CQI被发送。
46.根据实施例4-45中任一实施例所述的方法,其中WTRU基于RRC和RLC ACK/NACK信息来改变用于自动发送CQI的参数。
47.根据实施例5-46中任一实施例所述的方法,其中经由RACH的CQI传输由较高层信令配置。
48.一种经由共享信道发送信道质量指示(CQI)的WTRU。
49.根据实施例48所述的WTRU,该WTRU包括:测量单元,该测量单元用于执行至少一个参数的测量。
50.根据实施例49所述的WTRU,该WTRU包括:CQI生成器,该CQI生成器用于基于所述测量而生成CQI。
51.根据实施例50所述的WTRU,该WTRU包括:收发信机,该收发信机用于经由基于争用的上行链路共享信道来传输所述CQI。
52.根据实施例51所述的WTRU,其中,基于争用的上行链路共享信道是RACH。
53.根据实施例50-52中任一实施例所述的WTRU,其中用于生成CQI的测量是测量的BLER、下行链路参考信道上的路径损耗、下行链路参考信道上测量的SNR、CPICH Ec/N0、RACH传输所需要的RACH前同步码斜坡式升高的数量、以及下行链路参考信道上的接收功率中的至少一者。
54.根据实施例50-53中任一实施例所述的WTRU,其中所述CQI是WTRU为了维持目标BLER而支持的传输块大小和最大数据率中的至少一者的编码版本。
55.根据实施例50-53中任一实施例所述的WTRU,其中所述CQI是相对向上/向下命令。
56.根据实施例55所述的WTRU,其中相对向上/向下命令是基于WTRU为了维持目标BLER而支持的传输块大小和最大数据率中的至少一者而被生成的。
57.根据实施例52-56中任一实施例所述的WTRU,其中CQI使用RACH前同步码被传输。
58.根据实施例57所述的WTRU,其中多个特征序列被划分成多个组,并且WTRU基于所述CQI选择一个组并在所选择的组的特征序列中随机选择特征序列以用于传输RACH前同步码。
59.根据实施例57-58中任一实施例所述的WTRU,其中所述CQI被附加到RACH前同步码。
60.根据实施例57-59中任一实施例所述的WTRU,其中WTRU标识被附加到RACH前同步码。
61.根据实施例52-56中任一实施例所述的WTRU,其中CQI经由RACH消息的控制部分和RACH消息的数据部分中的至少一者被传输。
62.根据实施例61所述的WTRU,其中TFCI字段中的至少一个值为包含CQI的RACH消息而保留,以便节点-B区分包括CQI的RACH传输和不包括CQI的RACH传输。
63.根据实施例61-62中任一实施例所述的WTRU,其中CQI与RACHMAC SDU一起被传输。
64.根据实施例63所述的WTRU,其中CQI经由PHY-Status-IND原语从物理层以信号发送到MAC层。
65.根据实施例51-64中任一实施例所述的WTRU,其中WTRU周期性地传输CQI。
66.根据实施例65所述的WTRU,其中CQI以随机偏移发送,以减少WTRU之间的冲突可能性。
67.根据实施例51-66中任一实施例所述的WTRU,其中WTRU响应于来自节点-B的下行链路传输而传输CQI。
68.根据实施例67所述的WTRU,其中节点-B为了下行链路传输而使用低MCS。
69.根据实施例67-68中任一实施例所述的WTRU,其中节点-B在下行链路传输上不传输数据。
70.根据实施例51-69中任一实施例所述的WTRU,其中当WTRU成功解码HS-SCCH传输时,该WTRU传输CQI。
71.根据实施例64所述的WTRU,其中所述WTRU经由RRC测量报告发送所述CQI。
72.根据实施例51-71中任一实施例所述的WTRU,其中当信道状况变化超过预定阈值达预定时间段时,所述WTRU传输所述CQI。
73.根据实施例51-72中任一实施例所述的WTRU,其中所述CQI范围被划分为具有CQI阈值的多个CQI级别,并且当所述CQI越过CQI阈值并保持在新的CQI级别达预定时间段时,所述CQI被发送。
74.根据实施例51-73中任一实施例所述的WTRU,其中当CQI处于CQI统计数值的特定区域时,WTRU传输CQI。
75.根据实施例51-74中任一实施例所述的WTRU,其中WTRU基于从节点-B接收的控制信息而传输CQI。
76.根据实施例75所述的WTRU,其中控制信息经由HS-SCCH、MAC报头、物理层信令、层2控制信令、连接建立消息和BCCH中的至少一者而被传输到WTRU。
77.根据实施例52-76中任一实施例所述的WTRU,其中特征序列集合被保留以用于经由RACH传输CQI,以便节点-B区分包括CQI的RACH传输和不包括CQI的RACH传输。
78.根据实施例52-77中任一实施例所述的WTRU,其中信道化和扰频码集合被保留以用于经由RACH传输CQI,以便节点-B区分包括CQI的RACH传输和不包括CQI的RACH传输。
79.根据实施例51-78中任一实施例所述的WTRU,其中CQI经由在RRC层上的RRC消息而被发送。
80.根据实施例79所述的WTRU,其中所述CQI在所述RRC层上被过滤。
81.根据实施例51-80中任一实施例所述的WTRU,其中CQI具有多分层结构以便粗CQI和精CQI被分开传输。
82.根据实施例81所述的WTRU,其中粗CQI经由RRC消息被发送,而精CQI经由L1信令被发送。
83.根据实施例51-82中任一实施例所述的WTRU,其中CQI在处于Cell FACH状态的HSDPA连接的起始时刻被发送。
84.根据实施例51-83中任一实施例所述的WTRU,其中当WTRU变化到Cell_FACH状态时,CQI被发送。
85.根据实施例51-84中任一实施例所述的WTRU,其中当WTRU是Cell_FACH、Cell_PCH和URA_PCH状态中的一者时,CQI在小区重选时被发送。
86.根据实施例51-85中任一实施例所述的WTRU,其中当WTRU未能解码下行链路传输时,CQI被发送。
87.根据实施例86所述的WTRU,其中CQI报告率基于NACK和ACK的计数而被调整。
88.根据实施例51-78中任一实施例所述的WTRU,其中当期望接收数据或控制信息而没有数据或控制信息被接收时,所述CQI被发送。
89.根据实施例51-88中任一实施例所述的WTRU,其中在正确解码HS-SCCH传输后,如果WTRU不能恢复HS-PDSCH传输则CQI被发送。
90.根据实施例51-89中任一实施例所述的WTRU,其中在观察窗口K次不成功解码HS-SCCH传输后,CQI被发送。
91.根据实施例51-90中任一实施例所述的WTRU,其中在正确解码HS-SCCH传输并在L次重传后恢复在HS-PDSCH上的分组之后,CQI被发送。
92.根据实施例51-91中任一实施例所述的WTRU,其中在解码HS-SCCH传输后,如果WTRU未能接收任何HSDPA传输达预定时间段,则CQI被发送。
93.根据实施例51-92中任一实施例所述的WTRU,其中WTRU基于RRC和RLC ACK/NACK信息来改变用于自动发送CQI的参数。
94.根据实施例52-93中任一实施例所述的WTRU,其中经由RACH的CQI传输被较高层信令配置。
虽然本发明的特征和元素在优选的实施方式中以特定的结合进行了描述,但每个特征或元素可以在没有所述优选实施方式的其他特征和元素的情况下单独使用,或在与或不与本发明的其他特征和元素结合的各种情况下使用。本发明提供的方法或流程图可以在由通用计算机或处理器执行的计算机程序、软件或固件中实施,其中所述计算机程序、软件或固件是以有形的方式包含在计算机可读存储介质中的。关于计算机可读存储介质的示例包括只读存储器(ROM)、随机存取存储器(RAM)、寄存器、缓冲存储器、半导体存储设备、内部硬盘和可移动磁盘之类的磁介质、磁光介质以及CD-ROM碟片和数字多功能光盘(DVD)之类的光介质。
举例来说,恰当的处理器包括:通用处理器、专用处理器、常规处理器、数字信号处理器(DSP)、多个微处理器、与DSP核心相关联的一个或多个微处理器、控制器、微控制器、专用集成电路(ASIC)、现场可编程门阵列(FPGA)电路、任何一种集成电路(IC)和/或状态机。
Claims (10)
1.一种无线发射/接收单元(WTRU),该WTRU包括:
处理器,被配置成在上行链路信道上以定期间隔发送信道质量指示(CQI);
其中所述处理器还被配置成针对与所述WTRU相关联的无线电网络临时标识(RNTI)监控下行链路信道;
其中所述处理器还被配置成响应于检测到与所述WTRU相关联的所述RNTI,确定无线网络是否正在请求所述WTRU发送CQI;以及
其中所述处理器还被配置成响应于确定所述无线网络请求了所述WTRU发送所述CQI,发送所述CQI到所述无线网络。
2.根据权利要求1所述的WTRU,其中所述上行链路信道是共享信道或公共信道。
3.根据权利要求1所述的WTRU,其中所述处理器还被配置成在所述上行链路信道上发送肯定应答和否定应答。
4.一种方法,该方法包括:
无线发射/接收单元(WTRU)在上行链路信道上以定期间隔发送信道质量指示(CQI);
所述WTRU针对与所述WTRU相关联的无线电网络临时标识(RNTI)监控下行链路信道;
所述WTRU响应于检测到与所述WTRU相关联的所述RNTI,确定无线网络是否正在请求所述WTRU发送CQI;以及
所述WTRU响应于确定所述无线网络请求了所述WTRU,发送所述CQI到所述无线网络。
5.根据权利要求4所述的方法,其中所述上行链路信道是共享信道或公共信道。
6.根据权利要求4所述的方法,该方法还包括:所述WTRU在所述上行链路信道上发送肯定应答和否定应答。
7.一种无线网络设备,该无线网络设备包括:
处理器,被配置成在上行链路信道上以定期间隔从无线发射/接收单元(WTRU)接收信道质量指示(CQI);
其中所述处理器还被配置成在下行链路信道上发送请求所述WTRU发送CQI的请求;
其中所述请求与所述WTRU所关联的无线电网络临时标识(RNTI)一起被发送;以及
其中所述处理器还被配置成响应于所述请求从所述WTRU接收所述CQI。
8.根据权利要求7所述的无线网络设备,其中所述无线网络设备是节点B。
9.根据权利要求7所述的无线网络设备,其中所述上行链路信道是共享信道或公共信道。
10.根据权利要求7所述的无线网络设备,其中所述处理器还被配置成在所述上行链路信道上从所述WTRU接收肯定应答和否定应答。
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