CN102549943A - 无线数据通信中的资源度量量化 - Google Patents
无线数据通信中的资源度量量化 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2612—Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
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- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C2201/00—Transmission systems of control signals via wireless link
- G08C2201/40—Remote control systems using repeaters, converters, gateways
- G08C2201/41—Remote control of gateways
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- H—ELECTRICITY
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- H04M7/0066—Details of access arrangements to the networks
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
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- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
本申请描述了用于无线数据通信系统的资源的资源度量量化。在一个示例中,该量化包括:对多个频率分区(frequency partition)的信号参数进行测量,设置第一频率分区的第一资源度量等于第一值,基于分别将第二频率分区和第三频率分区的经测量的信号参数与第一分区的经测量的信号参数进行比较,来确定第二频率分区的第二资源度量和第三频率分区的第三资源度量,对第二资源度量和第三资源度量进行编码,并且向远程无线站发送经编码的资源度量。
Description
技术领域
概括地说,本描述内容涉及在无线蜂窝无线通信系统中传输无线信号信道的参数,并且具体地说,本描述内容涉及对用于分数频率分区选择的资源度量进行量化。
背景技术
一般情况下,蜂窝通信系统具有遍布于一区域中的基站(BS),以便提供与该区域中的移动站(MS)的数据连接。蜂窝系统允许无线通信使用较少的功率,并且其允许由连接到不同基站的不同用户对频率进行重用(reuse)。每一个基站通过通信基础设施连接到通信骨干网,以便连接到其它用户和位于该蜂窝系统之外的用户和系统。由于不同的BS对频率和信道进行重用,因此当MS位于一小区的边缘时,针对其它小区中的其它MS的信号可能会干扰该MS的信号。
在诸如IEEE 802.16m或者3GPP LTE(第三代合作伙伴计划长期演进)系统之类的移动宽带无线系统中,使用分数频率重用(FFR)来减轻处于小区边缘的用户从其它邻近小区中的用户接收到的干扰电平。FFR通过将邻居BS之中的一些子载波的发射功率设置在某个模式,来有效地减轻对于这些子载波的干扰电平。允许对FFR配置进行调整以实现最优的系统级功率负载、频谱划分和资源分配的框架被称为适应性分数频率重用(AFR)。与半静态地根据MS的几何因素(geometry)来将该MS分配到特定的频率分区(frequency patition)的传统FFR不同,AFR还考虑不同频率分区的短期衰落,以实现甚至更佳的系统性能。
为了支持AFR,BS需要在每一个广播时段内对其服务的每一个频率分区的资源度量广播一次,或者在某个数量的超帧中对其广播一次。每一个资源度量是16比特加上该具体频率的标识。MS使用该信息来选择其自己要使用的频率分区。在接收到频率分区、数据之后,MS向BS发送消息以向其通知自己所选择的频率分区。支持AFR所需要的信令给广播信令增加了显著的额外数据。此外,MS可以向基站报告其针对每一个分区经测量的干扰统计量。由于多个MS都向BS报告统计量,因此也可能需要显著的信令资源。
附图说明
在附图的图形中,通过示例而不是限制的方式对本发明的实施例进行描绘,其中,相同的附图标记用于指代相同的特征,其中:
图1是适合于实现本发明的实施例的无线系统的图;
图2是根据本发明的实施例对资源度量进行编码的过程流程图;并且
图3是根据本发明的实施例的无线终端或者站的框图。
具体实施方式
分数频率重用(FFR)技术允许在不同的频率分区上应用不同的频率重用因子。一般情况下,每一个基站具有四个频率分区。但是,该数量可以根据环境发生改变。每一个分区可以在同一小区中具有不同的发射功率电平。针对任何一个频率分区的特定功率电平是由BS来确定的,并且发生改变不太频繁。
频率分区边界是与物理资源单元(PRU)相对齐的。在802.16m中,PRU在单一子帧中的连续符号内具有18个相邻的子载波。将这些频率分区从最低逻辑资源单元(LRU)索引到最高LRU索引进行编号。如果存在一个,则其从重用-1分区开始,并且随后跟着三个重用-3分区。将它们分别编号为频率分区0(FP0)、频率分区(FP1)、频率分区(FP2)和频率分区(FP3)。
AFR所需要的额外信令在系统中产生额外的干扰,并且其需要额外的无线和处理资源来进行发送和处理。通过在不伤害AFR的性能的情况下减少这种开销,来提高整体系统性能。
不具有AFR的802.16m无线环境,在同一小区中具有三个邻居扇区的资源/功率分配模式。这些扇区具有7个重用子带:3个重用-3分区、3个重用-3/2分区和1个重用-1分区。每一个分区彼此之间具有不同数量的子载波和不同的发射功率。
在AFR系统中,对于高重用因子的情况而言,一个分区使用高发射功率,并且其它分区受到限制。下面给出一个示例,以说明在具有重用1和3的AFR配置的网络中,3个相邻扇区的典型发射功率向量:
扇区1:P=[PLow,PLow,PHigh,0,0,0,PRe use1]
扇区2:P=[PHigh,PLow,PLow,0,0,0,PRe use1]
扇区3:P=[PLow,PHigh,PLow,0,0,0,PRe use1]
可以通过PL=PHigh/PLow来指示功率负载因子PL(假定PHigh>PLow)。
具有发射功率PHigh的频率分区称为功率提升分区,并且具有发射功率PLow的分区称为功率调低分区。
AFR过程针对用户的任意分布和每一种功率负载因子,寻求发现最优的信道划分。在仿真中对相关的参数进行迭代更新,以优化系统性能。
当系统初始启动(boot up)时,没有关于区域中的MS的分布或者信号传播环境的信息。可以设置预先定义的重用分区和一些其它初始参数,以允许MS对不同的重用分区的平均SINR(信号与干扰加噪声比)进行测量。这些测量允许系统开始AFR调整过程。虽然当前针对802.16m指定了SINR,但也可以使用多种多样的其它参数(例如,信噪比、错误率、干扰和其它信道质量测量)。
具有高发射功率和低干扰的无线资源具有较高的平均SINR。更高的SINR允许更高的数据速率和更少的误差。因此,用户偏爱使用高功率分区。因此,较低功率分区可能没有被充分使用。另一方面,高SINR分区的更高发射功率的增益可能影响其它邻近的MS。增加的数据速率和减少的错误率的实现,是以相邻BS中的其它用户的受约束的发射功率和更高的干扰为代价。
可以使用称为‘资源’的度量来相对于系统资源对不同资源类型的使用情况进行测量。使用这些测量来对不同分区的用户的数量进行平衡。在AFR系统中,可以命令用户对每一个分区中的不同SINR进行估计,并根据其测量值和系统范围的资源度量信息来选择合适的分区。
同时,BS可以根据MS关于重用分区的MS偏爱(preference)的反馈,来调整所有分区的资源度量。将这些定期地向该BS正在服务的MS进行广播。可以将资源度量视作为用来选择分区的权重因子。
在一个示例中,重用-1分区的频率分区的资源度量具有等于1的固定值。将重用3频率区域中的两个相对应的功率调低频率分区的资源度量,各自编码成具有8比特分辨率的无符号数字值。
可以根据其它资源度量,来得出具有功率提升的任何频率分区FPi(i>0)的资源度量。作为结果,用于资源度量的量化比特的总数量是16比特。16比特的已编码资源度量分辨率提供了高的精度,其允许实现系统性能的次最优的资源分配解决方案。虽然每一个MS的性能可能是次最优的,但系统性能是高的,并且频谱效率是高的。另一方面,16比特的已量化的资源度量分辨率需要显著的信令资源。
可以对该资源度量分辨率应用均匀量化(uniform quantization)和分段量化(segment quantization),以减少必须要发送的比特的数量。通过对量化进行适当的选择,可以实现较少的性能损失。如下所述,可以使用10比特的均匀量化和8比特的分段量化来获得良好的系统性能。
配置合适的话,可以针对资源度量量化使用8-10比特,与常规的16比特传输相比,其节约了显著的信令开销。与此同时,实现了类似的频谱效率(SE)性能。
在一个示例中,针对每一个资源度量使用2L个量化电平,并且针对资源度量使用均匀量化。用于重用-1分区的频率分区的资源度量具有指派为1的固定值。
将重用3频率区域中的两个功率调低频率分区的资源度量,各自编码成具有分辨率为1/256的无符号(既不是正也不是负)数字值。将该资源度量量化成0和1之间的分数,其具有256个(8比特)可能值。
可以根据这两个功率调低频率分区的资源度量,来得出具有功率提升的第i个频率分区FPi(其中i>0)的资源度量。如上所述,将这两个功率调低频率分区的资源度量,量化成0和1之间的分数。类似地,也可以对功率提升的分区的资源度量进行量化,并从而得出两个功率调低分区的资源度量。
对使用例如2L个量化电平进行考虑。可以将电平范围划分成相等的量化电平,所有这些量化电平在0和1([0,1])之间。如果存在2L个相等的量化间隔,则需要L比特来对该值进行编码。随后,可以将每一个量化间隔映射为表示一个值。用此方式,将所有的资源度量均匀地量化到2L个值,并可以将其编码成L比特。
在第二示例中,对这些资源度量应用分段量化。虽然在第一示例中,使用相同数量的值2L来对所有的资源度量进行量化,但在第二示例中,将可能的资源值的范围划分成一些分段,并且对每一个分段进行不同地量化。
首先,BS确定所有分段的资源度量值的总范围。例如,这可以使用功率负载电平来进行。功率负载值是在小区规划阶段,作为实现容量和覆盖之间的最佳权衡的机制来确定的。一旦确定了功率负载值,则每一个频率分区就具有预先确定的功率提升或功率调低值。该值是BS向处于网络进入阶段中的所有MS广播的。MS可以使用该信息来进行更佳的链路调整。
可以将该范围表示成从a到b的范围([a,b]),其中a是最低实际值,并且b是最高值。第二,将资源度量值的范围划分成三个分区。这三个分区可以是:从0到a,从a到b,以及从b到1,即[0,a]、[a,b]、[b,1]。
在进行这些划分之后,可以确定每一个分区的量化电平的数量。在该示例中,将每一个分区划分成某个数量的均匀分布的电平。例如,可以使用2(L-2)个均匀量化电平来对范围[0,a]和[b,1]各自进行量化。可以使用2(L-1)个均匀量化电平对范围[a,b]进行量化。虽然在每一个范围中使用这些数量的电平已经获得了良好的结果,但具体的选择可能取决于具体的应用以及系统需求。
上面的值(L、L-1和L-2)被认为起到了良好的作用,这是由于在接收到这些资源度量值之后,这些资源度量值收敛到a和b之间的值。为了在收敛状态下具有更佳的性能,可以将从a到b的分区([a,b])中的量化间隔设置得与第一示例中的均匀量化相比更小。此外,如在第一示例中,将初始资源度量设置为1,按照中间值来设置从b到1的范围([b,1])中的量化间隔,以确保资源度量的收敛。另一方面,由于该资源度量很少取0到a范围([0,a])中的任何值,因此该分区只需要少数电平。
上面所描述的技术在使用少得多的数据的情况下,可以提供非常类似于16比特AFR信令的结果。针对第一示例的均匀量化使用4-10比特,以及针对第二示例的分段量化使用8比特所获得的频谱效率,几乎与16比特方法的相同。使用该方法可以获得无线资源的显著节省。
作为进一步的益处,如果将功率提升分区的资源度量编码成1或者某个其它固定的值,则其完全不需要进行发送。通过对其它资源度量相对于功率提升资源度量的分数来进行编码,可以通过减少要发送的数据量来获得额外的节省。
在第三示例中,可以选择特定的值。首先,频率分区(FP0)(重用-1分区)的资源度量具有等于1的固定值。基于用于该功率提升分区(FP0)的资源度量,来定义了重用3频率区域中的两个功率调低频率分区的资源度量。可以首先发送具有较低分区索引的分区的资源度量,跟着发送第二调低分区的资源度量。
可以将这两个功率调低频率分区的资源度量定义成0和1之间的分数x。将其编码成从0到15的无符号整数y,因此对于这两个频率中的每一个来说,需要四个比特。该编码过程可以如下所示地进行指派:
if 0<=x<0.5:
y=floor(x/0.125)
if 0.5<=x<0.8:
y=floor(x-0.5)*8/0.3+4
otherwise:
y=floor((x-0.8)/0.05)+12
具有功率提升的频率分区FPi(i>0)的资源度量可以进行如下所述地计算:资源度量(i)=3-总和(具有功率提升的分区的资源度量)。
图1示出了蜂窝无线系统10的一个示例。MS(移动站)12、14可以是移动的或固定的,并可以采用蜂窝电话、上网本、个人计算机、媒体播放器、设备、或者多种其它无线连接设备中的任何一种的形式。MS还可以称为用户站、远程站、终端或者其它术语。
在该系统中提供了多个基站(BS)16到24,以便为MS提供连接。根据应用,BS可以采用多种不同的形式,并且可以覆盖较大或者较小的区域以及发射功率。虽然将这些BS示出为与图1中类似,但它们可以彼此连接,并彼此之间进行不同的配置。在一些应用中,网络接入点或者MS对等体可以充当为BS或者实现BS的功能。在所描绘的示例中,第一MS在BS 19中注册,并且第二MS在另一个BS 23中注册。这种注册允许每一个MS与BS进行通信,以支持该MS和系统支持的所有服务。
每一个BS 16到24通过R6接口30连接到网关(GW)或基站控制器。在WiMAX的情况下,基站控制器称为ASN-GW(接入服务网络-网关)。存在三个网关25、26、27。每一个网关支持几个BS。这些网关可以彼此之间通过R4接口28进行连接,也可以彼此之间不连接,并且其全部直接或间接地连接到移动电话交换中心(MTSC)(没有示出)。在任何一个系统中,可以存在一个或多个MTSC。MTSC耦接到电话骨干网,后者提供对于其它电话系统、数据服务器和服务等等的接入。在一些实例中,BS可以通过骨干网而不是通过网关来直接连接到MTSC。
在所描绘的示例中,可以用多种不同的方式来在BS、GW和MTSC之间分布系统经营和管理。对于通信来说,第一MS 12可以通过相应连接的BS和GW来与第二MS进行通信。如果两个MS在同一BS处注册,则该BS可能能够在无需通过GW进行路由的情况下支持通信。类似地,如果第二MS连接到另一个系统、MTSC或者ISP(互联网服务提供商),则这两个MS可以通过骨干网进行通信。
图1示出了一个示例网络,但是,本发明可以应用于多种多样的不同网络配置,并对通信进行不同地路由以适合不同的情形和应用。图1中的图表示单一接入服务网络(ASN)。每一个ASN可以具有几个、甚至几百个BS和GW。BS使用R6接口连接到固定的GW。
图1示出了连接到BS 19的MS 12的一个示例。其朝着下一个BS 20,向图中的右边移动。第二BS 20连接到GW226。当该MS从连接到GW1的第一BS移动到连接GW2的第二BS时,将出现该MS从第一BS到第二BS的切换。在切换之后,该MS将监听目标基站所广播的资源度量,并随后选择用于该目标基站的频率分区。BS将继续广播资源度量,并且MS可以选择在某个点从一个频率分区改变到另一个频率分区。
图2示出了用于根据本发明的一个实施例,对资源度量进行编码的过程流程图。
图1示出了用于根据本发明的实施例,来对资源度量进行确定和编码的示例过程流程。在方框30,基站对多个频率分区的信号参数进行测量。这些参数可以是发射功率、接收功率、或者各种其它功率测量值。这些参数可以是多种信号质量测量值(例如,SINR、或者信号、信道、或比特与噪声和干扰的其它比率)中的任何一个。此外,这些参数也可以是错误率测量,例如,比特差错率、错误检测码值等等。或者,可以将这些参数中的一些组合在一起,以生成信道质量的表示。
在方框32,将第一频率分区的第一资源度量设置为等于某个值。在上面的示例中,将该资源度量设置为1。但是,根据具体的应用,可以将该资源度量设置为16、100、256、或者任何其它值。将上面示例中的第一频率分区选择为最高功率频率分区。但是,可以选择不同的分区。
为了简单起见,可以将第一频率分区选择为具有最大或者最小数量的经测量的参数或者组合的参数测量值的分区。这允许将其它频率分区的资源度量表示成第一频率分区的分数或者倍数。但是,作为替代,可以基于数字、时间、或频率来选择第一频率分区,并将其它资源度量表示成分数或倍数,或者是基于与第一分区的距离。
在方框34,基站确定其它频率分区的资源度量。在802.16m中,当前存在四个频率分区。但是,可以根据具体应用,将本发明调整为更多或者更少的分区。这些资源度量是反映所述其它频率分区的经测量的参数的值。但是,它们不是相对于原生(raw)值或者测量值来表示的,而是基于第一资源度量的值。换言之,基站将第二频率分区和第三频率分区的经测量的信号参数与第一分区的经测量的信号参数进行比较,并基于该比较来导出这些资源度量。
在上面的示例中,将这些资源度量确定为分数。就举例而言,如果第一频率分区具有6dB的功率电平,并且第二频率分区具有3dB的功率电平,则将6dB设置为1。随后,第二频率分区的资源度量为1/2。虽然3dB不是6dB的一半,但这种约定对于某些实现来说可能是有用的。如果将第一资源度量设置为16,则第二资源度量可以设置为8。可以根据具体系统的无线特性,使用不同的方法来确定第二资源度量和第三资源度量。
在方框36,对这些资源度量进行编码。如上所述,对所确定的资源度量应用量化电平,并且使用这些来确定表示这些值的短码或者比特序列。在上面所提及的均匀量化系统中(其中L是8),存在256个量化电平,其各自与0和1之间的值的1/256相对应。在第二资源度量是1/2的上面示例中,这与128/256相对应,并且其被编码成二进制值00001111。对于分段量化来说,首先确定资源度量的范围,随后使用针对该范围建立的量化电平来对资源度量的值进行编码。
在方框38,向远程无线站发送经编码的资源度量。在802.16m中,这由基站使用广播信道的一部分来进行。在其它无线协议中,可以在其它信道或者额外的信道上发送这些资源度量。此外,这些操作也可以由移动站或者用户单元执行,并将经编码的值发送给基站或者对等终端。
图3示出了可以用于基站和移动站以实现上面所描述的通信的硬件配置的示例。在图3中,站50由处理器52进行驱动。在MS的情况下,处理器可以是小型、低功率处理器,或者在BS的情况下,其是高功率、高速处理器。
处理器具有耦接到存储器56(例如,磁存储器、光存储器、或者固态存储器或者其某种组合)的存储器总线。存储器包含编程指令和可以在站之间发送和接收的用户数据。帐户数据58也可以连接到该总线。对于MS来说,这可以包括SIM(用户识别模块)和其它存储的个人参数。对于BS来说,这可以包括帐户授权数据库或者对于这种数据库的连接。
诸如定位传感器、电池或电源传感器、照相机和麦克风、收发机信号传感器之类的一组传感器54,耦接到处理器以向该处理器提供额外的数据。
用户接口总线(例如,USB(通用串行总线)或者其它类型的用户接口连接)将处理器连接到用户接口60(例如,键盘、触摸屏、鼠标、跟踪球)或者其它接口、显示器62和其它连接器64,以使其它设备连接起来。特定的用户接口可以用于适合特定的应用。用户可以通过用户接口输入或者添加(attach)文本或其它短消息,可以使用该接口来进行系统维护和控制。对于MS来说,用户可以通过该接口,使用麦克风和照相机进行记录,并且使用键盘或者触摸屏将它们添加到被命令要向特定用户或者一组用户发送的短消息。
处理器52耦接到用于与其它设备通信的另一个通信总线。有线接口66允许BS与其它BS、网关、基站控制器、运行和维护中心等等进行通信。对于BS来说,该有线接口可以允许网络连接和便携式设备,其可以允许将设备耦接到个人计算机以进行更新和维护。此外,通信总线还提供针对个域网(PAN)68(例如,蓝牙)、局域网(LAN)70(例如,Wi-Fi)、广域网72或者城域网(例如,802.16m)的有线或无线连接。根据应用环境,可以提供更多或者更少的网络适配器。一些网络功能可以是综合的或者分离的,并且可以使用多种不同的通信协议和配置。
广域网(WAN)适配器72包括逻辑单元74,以便对要通过该WAN发送的分组进行生成、组合、编码、加密和排队。该逻辑单元耦接到收发机76,以便对来自该逻辑单元的分组进行调制、编码和放大,从而通过天线78在WAN上进行传输。根据性能、费用和设计考量,天线可以具有一个或多个单元。相同的发射链也可以实现接收链的功能,或者可以使用单独的接收链(没有示出)。接收链可以执行接收、解调、放大、解析、解码等等的互易(reciprocal)功能,以获得要通过通信总线发送回处理器的数据。
在接收经编码的资源度量的情况下,将所接收的值发送给处理器,并随后用于选择频度分区。在注册、呼叫维持等等中使用该选择。在发送经编码的资源度量的情况下,使用天线来测量每一个频率分区的参数,并随后发送给处理器以便进行评估和编码。随后,通过收发机来发送这些结果。可以提供用于测量这些信号参数的单独天线系统,以便提高这些测量的质量。
此外,图3的配置也可以应用于具有装备有无线适配器的便携式或者桌面型计算机形式的移动站。可以将WAN适配器72作为USB、PCI(外围部件互连)总线、或者任何其它适当总线上的单独组件来进行提供,或者也可以将其作为内部系统组件来进行提供。
对于某些实现来说,可以期望与上面所描述的示例相比具有更少或者更多装备的通信站50。因此,该系统的配置可以根据诸如价格约束、性能需求、技术提升、和/或其它环境之类的众多因素,在不同的实现之间进行变化。
虽然在WiMAX和该通信协议与标准中的特定消息的背景下,描述了本发明的实施例,但本发明并不受此限制。本发明的实施例也可以应用于其它通信协议和WiMAX中的其它类型的控制消息以及其它协议,以便允许移动站或用户站对无线资源进行评估和选择。
类似地,使用与WiMAX体系结构和协议相一致的术语来描述了本发明的实施例。但是,也可以将本发明描述理解成适用于使用不同的名称的类似和等同的设备和信号。例如,如本申请所使用的术语移动站可以替代地或另外地应用于改进的移动站、用户站(subscriber station)、用户站(userstation)、远程站、用户单元、移动单元或类似的设备。术语基站可以应用于基站收发机、接入点、无线网络节点、中继器或者中继站或者类似的设备。术语网关可以应用于基站控制器、交换中心、无线路由器和类似的设备。此外,如应用于频率分区的资源度量的本申请描述,还可以应用于诸如信道、子信道、载波、子载波等等之类的其它无线资源的其它参数。可以对本发明进行调整,以便与这些协议的变型和修改以及在其它类型的系统中使用的其它协议一起工作。例如,在3GPP LTE中,上文所描述的方法可以用于ICIC(小区间干扰协调)体系结构。
虽然可以在编程的处理器(例如,处理器52)的控制之下执行本申请描述的步骤,但在替代的实施例中,例如,这些步骤可以完全地或部分地通过诸如现场可编程门阵列(FPGA)、TTL逻辑或者专用集成电路(ASIC)之类的任何可编程或硬编码逻辑来实现。另外,本发明的方法可以通过编程的通用计算机组件或者定制的硬件组件的任意组合来实现。因此,不应将本申请所公开内容解释为将本发明限制于所描述步骤由硬件组件的特定组合来执行的特定实施例。
可以将本发明作为包括机器可读介质的计算机程序产品来进行提供,其中在机器可读介质上存储有指令,该指令可以用于对计算机(或者其它机器)进行编程以执行根据本发明的过程。所述机器可读介质可以包括,但不限于:软盘、光盘、CD-ROM和磁光碟、ROM、RAM、EPROM、EEPROM、磁卡或光卡、闪存、或者适合于存储电指令的任何其它类型的介质。
在本发明描述中,为了说明起见,为了对本发明有一个透彻理解,对众多特定细节进行了阐述。但是,可以在不使用这些特定细节中的一些的情况下实施本发明。在其它实例中,公知的结构和设备以框图形式给出。针对任何具体的实现,本领域普通技术人员可以按照适当性来提供特定的细节。
虽然本公开内容详细描述了本发明的示例性实施例,但应当理解的是,本发明并不受限于所描述的精确实施例。因此,应将说明书和附图视作为示例性而不是限制性的。可以在所附权利要求书规定的本发明的保护范围之内实施各种调整、修改和改变。
Claims (16)
1.一种方法,包括:
对多个频率分区的信号参数进行测量;
设置第一频率分区的第一资源度量等于第一值;
基于分别将第二频率分区和第三频率分区的经测量的信号参数与所述第一分区的经测量的信号参数进行比较,来确定所述第二频率分区的第二资源度量和所述第三频率分区的第三资源度量;
对第二资源度量和第三资源度量进行编码;以及
向远程无线站发送经编码的资源度量。
2.根据权利要求1所述的方法,其中,对信号参数进行测量包括:测量信噪比。
3.根据权利要求1所述的方法,其中,对信号参数进行测量包括:测量发射功率。
4.根据权利要求1所述的方法,其中,确定第二资源度量和第三资源度量包括:将所述第二资源度量和所述第三资源度量定义为所述第一资源度量的分数。
5.根据权利要求1所述的方法,所述第一值是1,并且其中,确定第二资源度量和第三资源度量包括:将所述第二资源度量和所述第三资源度量定义为具有零和一之间的值的分数。
6.根据权利要求1所述的方法,其中,对所述第二资源度量和所述第三资源度量进行编码包括:将所述资源度量量化为与固定数量的量化电平中的一个相对应。
7.根据权利要求6所述的方法,其中,所述量化电平在大小上是均匀的。
8.根据权利要求6所述的方法,其中,所述量化电平对于一个范围的资源度量值来说较小,并且所述量化电平对于另一个范围的资源度量值来说较大。
9.根据权利要求6所述的方法,其中,将可能的资源度量值的范围划分成三段,与第一段相比,第二段具有更多的量化电平,并且与所述第一段相比,第三段具有更少的量化电平。
10.根据权利要求9所述的方法,其中,所述第一段与高范围的值相对应,并且所述第三段与低电平的值相对应。
11.根据权利要求10所述的方法,其中,所述第二段具有2(L-1)个量化电平,所述第一段具有2(L-2)个量化电平,并且所述第三段具有2(L-2)个量化电平。
12.根据权利要求1所述的方法,其中,发送经编码的资源度量包括:发送所述第二资源度量和所述第三资源度量相对于所述第一资源度量的经编码的值,而不发送所述第一资源度量。
13.一种装置,包括:
收发机,用于接收无线数据信号并且对所述无线数据信号的无线参数进行测量;
处理器,用于通过将第一数据信号的经测量的参数设置为第一值,并且随后基于将所述第一数据信号的经测量的参数与其它数据信号的经测量的参数进行比较以确定所述其它数据信号的资源度量,来确定经测量的参数的资源度量,
所述处理器用于对所确定的资源度量进行编码以便进行传输,
所述收发机用于发送经编码的资源度量。
14.根据权利要求13所述的装置,其中,所述处理器通过将所述资源度量量化成与固定数量的量化电平中的一个相对应来进行编码。
15.根据权利要求14所述的装置,其中,将可能的资源度量值的范围划分成三段,与第一段和第三段相比,第二段具有更多的量化电平。
16.根据权利要求13所述的装置,其中,所述收发机是基站收发机,并且其中,所述收发机用于将经编码的资源度量作为广播信道传输的一部分来进行发送。
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CN201080035027.4A Expired - Fee Related CN102474821B (zh) | 2009-08-24 | 2010-08-23 | 用于无线通信的功率节省的设备、系统和方法 |
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