WO2011097819A1 - 用于发送和接收功率余量报告的方法和设备 - Google Patents

用于发送和接收功率余量报告的方法和设备 Download PDF

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Publication number
WO2011097819A1
WO2011097819A1 PCT/CN2010/070673 CN2010070673W WO2011097819A1 WO 2011097819 A1 WO2011097819 A1 WO 2011097819A1 CN 2010070673 W CN2010070673 W CN 2010070673W WO 2011097819 A1 WO2011097819 A1 WO 2011097819A1
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WIPO (PCT)
Prior art keywords
power headroom
power
headroom report
user equipment
carrier component
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PCT/CN2010/070673
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English (en)
French (fr)
Inventor
温萍萍
杨林
仲崇显
Original Assignee
上海贝尔股份有限公司
阿尔卡特朗讯
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 上海贝尔股份有限公司, 阿尔卡特朗讯 filed Critical 上海贝尔股份有限公司
Priority to JP2012552230A priority Critical patent/JP5674820B2/ja
Priority to PCT/CN2010/070673 priority patent/WO2011097819A1/zh
Priority to PL18194380T priority patent/PL3432651T3/pl
Priority to KR1020127023431A priority patent/KR20120118499A/ko
Priority to ES18194380T priority patent/ES2848867T3/es
Priority to US13/577,786 priority patent/US9036494B2/en
Priority to EP10845493.5A priority patent/EP2536199A4/en
Priority to CN201080055114.6A priority patent/CN102687552B/zh
Priority to EP18194380.4A priority patent/EP3432651B1/en
Priority to BR112012019986-2A priority patent/BR112012019986B1/pt
Publication of WO2011097819A1 publication Critical patent/WO2011097819A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/365—Power headroom reporting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity

Definitions

  • the present invention generally relates to wireless communication systems. More specifically, the present invention relates to methods and apparatus for transmitting and receiving Power Headroom reports. Background technique
  • Power control is a key technology in wireless communication systems. By controlling the transmit power of each user equipment (UE) and base station (BS or eNB), the interference in the wireless communication system can be minimized to maximize system capacity without affecting the amount of communication shield. In addition, power control enables user equipment to have longer standby times.
  • UE user equipment
  • BS base station
  • power control including open loop and closed loop is performed at the user equipment.
  • the user equipment needs to send a power headroom report to the base station, and the base station derives a power spectral density (PSD) and a residual used by the physical uplink shared channel (PUSCH) at the user equipment according to the received power headroom report. Power margin.
  • the base station can determine how many resource units (RUs) are allocated to the user equipment and a modulation and coding scheme (MCS) suitable for use by the user equipment, thereby ensuring that the user equipment and the base station The expected signal to interference and noise ratio (SINR) is obtained over the wireless link.
  • RUs resource units
  • MCS modulation and coding scheme
  • LTE Long Term Evolution
  • the above power headroom is defined as the difference between the maximum allowed transmit power of the user equipment and the transmit power currently used for the PUSCH.
  • CC carrier component-specific power control
  • PUCCH physical uplink control channel
  • PUSCH PUSCH co-transmission
  • power amplifiers etc.
  • the new feature that causes the user equipment to transmit a power headroom report to the base station is complicated compared to LTE-Release 8, and power headroom reports for the new features introduced above have not been considered yet.
  • RAN1 under the Third Generation Partnership Program has agreed to perform specific to each Power control of PUCCH and PUSCH of carrier components, wherein the PUSCH power control equation for compensating for path loss due to frequency spacing is as follows:
  • the full compensation for PUCCH can be calculated by:
  • - is a parameter related to the PUCCH format
  • - g ('') is a function of the closed-loop power control command on the ith carrier component.
  • LTE Release 10 In RANI #55bis, in addition to the time division multiplexing (TDM) between PUSCH and PUCCH currently implemented in LTE Release 8, LTE Release 10 also supports simultaneous transmission of PUCCH and PUSCH on the same carrier component. Therefore, the transmission power of the user equipment needs to be shared between the two channels, so that the total transmission power on the i-th carrier component is equal to the sum of the transmission powers of the two channels of PUSCH and PUCCH, which is expressed as follows:
  • Psum _ p PUSCH + p PUCCH (3) where is the total transmit power of the user equipment on the ith carrier component, ?i It is the transmission power of the PUSCH on the i-th carrier component, but the transmission power of the PUCCH on the i-th carrier component.
  • the power margin on the i-th carrier component which is the maximum allowed transmit power on the i-th carrier component.
  • the power spectral density derived at the user equipment is not only based on open loop power control, but also based on a closed loop power control command function, and the closed loop power control command sent by the base station may have errors (eg, decoding the closed loop power at the user equipment) An error occurred while controlling the command or the closed loop power control command signal could not be detected correctly).
  • the base station since the base station only receives the power headroom report including the final power headroom value, it does not receive the power value used for the PUSCH and PUCCH on the i-th carrier component. Therefore, the base station will not be able to derive the power spectral density and remaining power headroom used by the PUSCH at the user equipment, and thus cannot accurately determine how many resource units to allocate to the carrier component, and thus accurate resource scheduling and allocation cannot be achieved.
  • a method and apparatus for transmitting and receiving power headroom reports that are capable of providing a plurality of new features introduced in LTE-A (eg, multiple carrier components, PUCCH and PUSCH on one carrier component)
  • the complete power headroom reporting mechanism for simultaneous transmissions and one or more power amplifiers Based on the power headroom reporting mechanism, the base station can efficiently perform resource allocation and scheduling to achieve expected transmission quality.
  • the present invention provides a new solution, which is specifically as follows:
  • a method for transmitting a power headroom report comprising: forming a power headroom report specific to each carrier component at a user equipment, and transmitting a power headroom report to the base station.
  • the power headroom report is included in a packet data unit of a physical uplink shared channel transmitted on the carrier component.
  • a power headroom report is sent to the base station based on a period or event specific to each carrier component.
  • the period is a number of transmission time intervals or a certain timer value.
  • the event is a change in transmission path loss between the user equipment and the base station since the previous power headroom report transmission exceeds a predetermined value or the user equipment has performed a predetermined number of power control commands.
  • the power headroom report includes content items related to physical uplink shared channel transmit power and physical uplink control channel transmit power.
  • a method for receiving a power headroom report comprising: receiving, at a base station, a power headroom report specific to each carrier component from a user equipment; and based on receiving The power headroom report determines the power spectral density and remaining power headroom of the physical uplink shared channel on each carrier component.
  • the method further comprises: determining a number of resource units to be allocated to each carrier component and a modulation and coding scheme based on a power spectral density of the physical uplink shared channel and a remaining power margin.
  • an apparatus for transmitting a power headroom report comprising: a forming apparatus and a transmitting apparatus, wherein the forming apparatus is configured to form a power headroom specific to each carrier component at the user equipment Reporting, and the transmitting device is configured to send the power headroom report to the base station.
  • an apparatus for receiving a power headroom report comprising: a receiving apparatus and a determining apparatus, wherein the receiving apparatus is configured to receive, at a base station, each carrier specific to the user equipment The power headroom report of the component; and the determining means is operative to determine a power spectral density and a remaining power headroom of the physical uplink shared channel on each carrier component based on the received power headroom report.
  • LTE-A system eg, multiple carrier components, simultaneous transmission of PUCCH and PUSCH on one carrier component, and one or more power amplifiers
  • Rate margin reporting mechanism e.g., by receiving a power headroom report specific to each carrier component, the base station can correctly derive how many resource units to allocate to the user equipment and the corresponding modulation and coding scheme, thereby making effective resource scheduling and ensuring transmission of the wireless link. quality.
  • FIG. 1 is a schematic diagram showing a wireless communication system in which a method according to the present invention can be applied;
  • FIG. 2 is a flow chart showing schematically a method for transmitting a power headroom report according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram showing a transmission power measurement report according to an embodiment of the present invention.
  • FIG. 4 is a simplified flow chart schematically showing a method of receiving a power headroom report according to an embodiment of the present invention
  • FIG. 5 is a simplified block diagram schematically showing an apparatus for transmitting a power headroom report according to an embodiment of the present invention
  • Figure 6 is a simplified block diagram schematically illustrating an apparatus for receiving a power headroom report in accordance with one embodiment of the present invention. Detailed ways
  • a wireless communication system in which a method in accordance with the present invention may be applied, such as a 3GPP LTE-A system.
  • the base station and the user equipment perform wireless communication in accordance with the method of the present invention, including the user equipment transmitting a power headroom report to the base station in the uplink (UL) direction (specific to each carrier component, as described in more detail below) ), while the base station providing the wireless access service is receiving
  • the power spectrum density of the user equipment and the remaining power are determined according to the received power headroom report, thereby determining the number of resource units to be allocated to the user equipment and the corresponding modulation and coding scheme, The expected signal to interference and noise ratio of the wireless link between the base station and the user equipment is guaranteed.
  • the base station sends the determined number of resource units and the corresponding modulation and coding scheme to the user equipment in the downlink (DL) direction.
  • DL downlink
  • the illustrated wireless communication system is merely exemplary and is intended to explain the principles of the invention. Also, in order to avoid unnecessarily obscuring the principles of the present invention, network elements, components, and corresponding wireless communication processing procedures that are indispensable to the method of the present invention but essential for wireless communication are omitted.
  • step 200 a power headroom report specific to each carrier component is formed at the user equipment.
  • the formation of a power headroom specific to each carrier component is reported to be specific to each carrier component based on the open loop equation and closed loop power control command function specific to each carrier component described above.
  • the power spectral density of the carrier component In order for the base station to be able to determine how many resource unit numbers are to be allocated for the PUSCH on each carrier component of the serving user equipment, a power headroom report for each carrier component should be sent to the base station.
  • the power headroom report specific to each carrier component is included in a Packet Data Unit (PDU) of the PUSCH transmitted on the carrier component.
  • PDU Packet Data Unit
  • the power headroom report specific to the ith carrier component formed at the user equipment may relate to the maximum transmit power allowed by the ith carrier component, The current PUSCH and PUCCH transmit power on the i-th carrier component. For example, for the ith carrier component,
  • the present invention does not transmit only one content item of the formula (4) as in the prior art scheme, but in the power headroom report specific to the i-th carrier component.
  • the transmission power conditions for the PUSCH and the PUCCH are respectively transmitted in two. That is, the power headroom report provided by the present invention includes content items related to PUSCH transmission power and PUCCH transmission power, thereby overcoming the defects existing in the prior art solutions, and the base station can make based on the power headroom report. Proper resource allocation or scheduling.
  • the power headroom report specific to the ith carrier component formed at the user equipment may also relate to the ith as described above.
  • the maximum transmit power allowed by the carrier component, the current PUSCH transmit power on the i-th carrier component, and the potential PUCCH transmit power may be used for future data transmission on the PUSCH and PUCCH.
  • step 210 a power headroom report is sent to the base station.
  • the power headroom report can be triggered to be transmitted to the base station based on a period or event specific to each carrier component.
  • the period may be a number of transmission time intervals or a timer value, for example, in units of leap seconds
  • the event may be, for example, a change in transmission path loss between the user equipment and the base station since the previous power headroom report transmission
  • the predetermined value or the user equipment has performed a predetermined number of power control commands.
  • FIG. 3 is a schematic diagram showing a transmission power headroom report according to an embodiment of the present invention.
  • a plurality of carrier components such as CC1 CC2 . . . CCn, are allocated at the user equipment, wherein each carrier component has its own trigger (periodic or event), such as trigger 1 Trigger 2, . . . trigger n, and for each carrier component, a specific power headroom report is formed, as shown in the figure PH1 PH2 . . . PHn, etc.
  • Each power headroom report PH1, PH2, . . . , ⁇ includes various content items mentioned above.
  • a power headroom report included in the packet data unit is transmitted to the base station on the corresponding PUSCH. For example, > PH1 is transmitted on PUSCH1, ⁇ 2 is transmitted on PUSCH2, and . . . , and ⁇ n is transmitted on PUSCHn.
  • step 410 a power headroom report specific to each carrier component from the user equipment is received at the base station.
  • step 420 a power spectral density and a remaining power headroom of the physical uplink shared channel on each of the carrier components are determined based on the received power headroom report. This determination process is described in detail below.
  • the base station After the base station receives the power headroom report of the maximum transmit power allowed for the i-th carrier component, the current PUSCH and the PUCCH transmit power (or potential PUCCH transmit power) on the i-th carrier component, as described above, Can be determined
  • the power spectral density on the PUSCH at the user equipment can be calculated as follows:
  • ⁇ _ set the number of resource elements M to 4. Further, the base station can determine according to the following formula The number of resource elements M allocated to the i-th carrier component of the user equipment,
  • the base station can also determine an appropriate modulation and coding scheme based on the power headroom report transmitted by the user equipment. Specifically, the base station obtains a signal to interference and noise ratio of the PUSCH according to the derived power spectral density ⁇ and the measured channel quality, thereby determining a modulation and coding scheme corresponding to the signal to interference and noise ratio that the user equipment will use.
  • FIG. 5 is a diagram showing a report for transmitting power headroom according to an embodiment of the present invention.
  • a block diagram of the device 500 As shown in FIG. 5, the apparatus 500 includes a forming device 5 10 and a transmitting device 52 0 .
  • the forming device 510 is configured to form a power headroom report specific to each carrier component at the user equipment. For a detailed forming process, refer to the description made in conjunction with FIG. 2; and the transmitting device 520 is configured to send power to the base station. Balance report.
  • the device 600 includes a receiving device 610 and a determining device 620.
  • the receiving device 610 is configured to receive, at the base station, a power headroom report specific to each carrier component from the user equipment, and the determining device 620 is configured to determine the each carrier based on the received power headroom report.
  • the power density of the physical uplink shared channel on the component and the remaining power margin, the detailed determination process can be seen in the description made above in connection with FIG.
  • the present invention is described herein by taking an LTE-A wireless communication system as an example, the present invention can be applied to any wireless communication system that performs power control on the user equipment side and that has a plurality of carrier components.
  • the carrier component-specific power headroom report relates to the difference between the maximum transmit power specific to the carrier component and the power used on the carrier component.
  • the maximum transmit power specific to the carrier component is not associated with the total transmit power of the user equipment.
  • the base station only needs to note that the sum of the maximum transmit powers on all carrier components should not exceed the total of the user equipment. Send power can be. That is, the power headroom reporting mechanism of the present invention that is specific to the carrier component is not affected by one or more power amplifier conditions.
  • the present invention can take the form of an entirely hardware implementation, an entirely software implementation, or an implementation of both hardware units and software units.
  • the invention is implemented in software including, but not limited to, firmware, resident software, microcode, and the like.
  • firmware resident software
  • microcode microcode

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Description

用于发送和接收功率余量报告的方法和设备 技术领域
本发明一般地涉及无线通信系统。 更具体地， 本发明涉及用于 发送和接收功率余量 （ Power Head Room )报告的方法和设备。 背景技术
在无线通信系统中， 功率控制是一项关键的技术。 在不影响通 话盾量的前提下，通过控制每个用户设备（UE )和基站（BS或 eNB ) 的发送功率可使无线通信系统中干扰最小化从而使系统容量最大 化。 另外， 功率控制还能使用户设备具有更长的待机时间。
当前， 在用户设备处执行包括开环和闭环在内的功率控制。 基 于这样的功率控制， 用户设备需要向基站发送功率余量报告， 而基 站根据接收到的功率余量报告导出用户设备处的物理上行共享信道 ( PUSCH )所使用的功率谱密度 （PSD ) 和剩余的功率余量。 接着， 利用导出的功率谱密度和剩余的功率余量， 基站可以确定将多少资 源单元 （RU ) 分配给用户设备以及适于用户设备使用的调制编码方 案 （MCS ) , 从而确保在用户设备和基站之间的无线链路上获得预 期的信干噪比 （SINR ) 。
在第三代合作伙伴计划 （3GPP ) 长期演进 （LTE ) 中， 上述的 功率余量被定义为允许的用户设备最大发送功率与当前用于 PUSCH 的发送功率的差值。 在 LTE-A中， 由于引入多个载波分量 （Carrier Component, 即 CC )从而具有支持特定于载波分量的功率控制、 物 理上行控制信道 （PUCCH ) 和 PUSCH 的共同发送以及一个或多个 功率放大器等新特征， 令用户设备向基站发送功率余量报告相比较 于 LTE-Release 8变得复杂， 并且当前还没有考虑关于上述引入的新 特征的功率余量报告。
另外， 第三代合作伙伴计划下的 RAN1 已经同意执行特定于每 个载波分量的 PUCCH和 PUSCH的功率控制， 其中用于补偿由于频 率间隔造成的路径损耗的 PUSCH功率控制方程如下：
； = min {PC MAX ' 10 log,。 PUSCH (i) +尸。— PUSCH ( ) + a, -{PL, -FPL (Afs)) + FPL (Δ ) + Δπ(ί) + /(Δ; )} (1) 其中：
是用户设备在第 ί个载波分量上的最大发送功率；
是分配给第 i个载波分量的资源单元数目；
- „(0和《,.是特定于第 i个载波分量的开环功率控制参数；
是针对于第 i个载波分量所估计的路径损耗；
- (Δ )是由于第 i个载波分量相对于锚定载波分量的频率间隔 Δζ所 造成的路径损耗差；
- Δπ (/)是相对于传输格式的偏移；
- / (Δ, )是闭环功率控制命令的函数。
针对 PUCCH的全补偿可以通过下式计算： 其中：
- P0_PUCCH (0是特定于第 i个载波分量的小区特定参数和用户设备特 定参数之和；
- (0是针对于第 i个载波分量所估计的路径损耗；
- 是 PUCCH格式相关的参数；
是对应于 PUCCH格式 la的参数；
- g ('')是第 i个载波分量上的闭环功率控制命令的函数。
在 RANI #55bis中， 除了当前 LTE Release8中所执行的 PUSCH 和 PUCCH之间的时分复用 （TDM ) 以外， LTE Release 10也支持在 相同的载波分量上的 PUCCH和 PUSCH的同时发送。 因此， 用户设 备的发送功率需要在两个信道之间共享,从而在该第 i个载波分量上， 总的发送功率等于 PUSCH和 PUCCH两个信道的发送功率之和， 表 示为下式：
psum _ p PUSCH + p PUCCH (3) 其中 是用户设备在第 i个载波分量上的总的发送功率， ?i 是第 i个载波分量上的 PUSCH的发送功率， 而 是第 i个载波分 量上的 PUCCH的发送功率。
基于上式 （3 ) ， 许多现有的涉及功率余量报告的技术方案均认 为由于基站知道用于 PUSCH 和 PUCCH之间分配功率的标准化准 则， 因此建议向基站发送通过下式计算的功率余量报告即可，
Figure imgf000005_0001
其中， 是第 i个载波分量上的功率余量， 是第 i个载波分 量上的最大允许发送功率。 然而， 在用户设备处导出的功率谱密度 不仅基于开环功率控制， 而且还基于闭环功率控制命令函数， 而由 基站发送的该闭环功率控制命令可能存在错误 （例如在用户设备处 解码该闭环功率控制命令时出现错误或者不能正确地检测到该闭环 功率控制命令信号） 。 这样， 在现有的技术方案中， 由于基站仅接 收到包括最终的功率余量值的功率余量报告， 其并没有接收到关于 第 i个载波分量上的 PUSCH和 PUCCH所使用的功率值。 因此， 基 站将无法导出用户设备处的 PUSCH 所使用的功率谱密度和剩余的 功率余量， 进而无法准确确定要向该载波分量分配多少资源单元， 也就无法实现精确的资源调度和分配。
因此， 需要一种用于发送和接收功率余量报告的方法和设备， 其能够提供针对 LTE- A中引入的多个新特征（例如， 多个载波分量、 在一个载波分量上的 PUCCH和 PUSCH的同时发送以及一个或多个 功率放大器） 的完整功率余量报告机制。 基于该功率余量报告机制， 基站可以有效地进行资源分配和调度， 从而实现预期的传输质量。 发明内容
鉴于现有技术存在上述问题， 本发明提供了新的解决方案， 具 体如下：
根据本发明的一个方面， 提供一种用于发送功率余量报告的方 法， 读方法包括： 在用户设备处形成特定于每个载波分量的功率余 量报告， 以及向基站发送功率余量报告。 优选地，功率余量报告包括在发送于载波分量上的物理上行共享 信道的分組数据单元中。
优选地，基于特定于每个载波分量的周期或事件来触发向基站发 送功率余量报告。
进一步优选地， 该周期是若干个传输时间间隔或某个定时器值。 进一步优选地，该事件是自前次功率余量报告发送以来用户设备 和基站之间的传输路径损耗的改变超出某个预定的值或者用户设备 已经执行了预定次数的功率控制命令
优选地，功率余量报告包括与物理上行共享信道发送功率和物理 上行控制信道发送功率有关的内容项。
根据本发明的另一个方面，提供一种用于接收功率余量报告的方 法， 该方法包括： 在基站处接收来自于用户设备的特定于每个载波 分量的功率余量报告； 以及基于接收到的功率余量报告确定每个载 波分量上的物理上行共享信道的功率谱密度和剩余的功率余量。
优选地， 谅方法进一步包括： 基于物理上行共享信道的功率谱密 度和剩余的功率余量来确定将分配给每个载波分量的资源单元数目 和调制编码方案。
根据本发明的一个方面， 提供一种用于发送功率余量报告的设 备， 该设备包括： 形成装置和发送装置， 其中形成装置用于在用户 设备处形成特定于每个载波分量的功率余量报告， 而发送装置用于 向基站发送该功率余量报告。
根据本发明的另一个方面，提供一种用于接收功率余量报告的设 备， 该设备包括： 接收装置和确定装置， 其中接收装置用于在基站 处接收来自于用户设备的特定于每个载波分量的功率余量报告； 而 确定装置用于基于接收到的功率余量报告确定每个载波分量上的物 理上行共享信道的功率谱密度和剩余的功率余量。
通过实施本发明所提供的方法和设备， 能够向具有多个新特征
(例如， 多个载波分量、 在一个载波分量上的 PUCCH和 PUSCH的 同时发送以及一个或多个功率放大器） 的 LTE-A系统提供完整的功 率余量报告机制。 进一步， 通过接收特定于每个载波分量的功率余 量报告， 基站能够正确地导出要向用户设备分配多少资源单元以及 相应的调制编码方案， 从而做出有效地资源调度并确保无线链路的 传输质量。 附图说明
通过参照附图阅读以下所作的对非限制性实施方式的详细描述，本 发明的其它特征、 目的和优点将会变得更明显。在附图中， 相同和相似 的附图标记代表相同或相似的装置或方法步骤， 其中：
图 1 是示意性示出其中可以应用根据本发明的方法的无线通信 系统的示意图；
图 2 是示意性示出根据本发明一个实施方式的用于发送功率余 量报告的方法的筒化流程图；
图 3 是示意性示出根据本发明一个实施方式的发送功率佘量报 告的示意图；
图 4 是示意性示出根据本发明一个实施方式的接收功率余量报 告的方法的简化流程图；
图 5 是示意性示出根据本发明一个实施方式的用于发送功率余 量报告的设备的简化框图； 以及
图 6 是示意性示出根据本发明一个实施方式的用于接收功率余 量报告的设备的简化框图。 具体实施方式
下面将结合附图详细描述本发明的实施方式。
首先参考图 1 ,其示出其中可以应用根据本发明的方法的无线通 信系统， 读无线通信系统例如可以是 3GPP LTE-A系统。 如图所示， 基站和用户设备执行根据本发明的方法的无线通信， 包括用户设备 在上行链路 （UL ) 方向上向基站发送功率余量报告 （特定于每个载 波分量， 下文将详细描述） ， 而提供无线接入服务的基站在接收到 用户设备发送的功率余量报告后， 将根据接收到的功率余量报告确 定用户设备的功率谱密度以及剩余的功率， 从而确定将向用户设备 分配的资源单元数目以及相应的调制编码方案， 以保证基站与用户 设备之间无线链路的预期信干噪比。 接着， 基站在下行链路 （DL ) 方向上将确定的资源单元数目和相应的调制编码方案发送给用户设 备。 需要指出的是， 所示出的无线通信系统仅仅是示例性的， 目的 在于解释本发明的原理。 并且， 为了避免不必要地混淆本发明的原 理， 省略了与本发明的方法无关但对于进行无线通信必不可少的网 元、 組件以及相应的无线通信处理过程。
图 2 是示意性示出根据本发明的用于发送功率余量报告的方法 的简化流程图。 在步骤 200 中， 在用户设备处形成特定于每个载波 分量的功率余量报告。 在本发明中， 形成特定于每个载波分量的功 率余量报告在于考虑到基于前述的特定于每个载波分量的开环方程 和闭环功率控制命令函数， 将在每个载波分量上形成特定于载波分 量的功率谱密度。 为了使基站能够确定将为服务的用户设备的每个 载波分量上的 PUSCH分配多少资源单元数目，应当将关于每个载波 分量的功率余量报告发送到基站。
优选地， 特定于每个载波分量的功率余量报告包括在发送于载 波分量上的 PUSCH的分组数据单元 （ PDU ) 中。
当用户设备在第 i个载波分量上同时发送 PUCCH和 PUSCH时， 则在用户设备处形成的特定于第 i 个载波分量的功率余量报告可以 涉及第 i个载波分量所允许的最大发送功率、第 i个载波分量上当前 的 PUSCH 和 PUCCH 发送功率。 例如， 对于第 i 个载波分量，
PltCmx = lAdBm = 25\mw PfUCCH = \9dBm = SOmw , = 20.S bm = \20mw , 则在用户设备处形 成的特定于第 i个载波分量的功率余量报告的内容项可以如下表达：
- - UX" = \.\dBm和 -Pt puccti = 223dBm；
- - Ρ， = 21. wsm和 P 一 P = 1 ；
- - prccH = 22.3 和 - Ρ Η - p ccH = 1? ；
21. WSm和 = \9dBm = Omw； ― f ― Ps nCCH = 123dBm和 P = 20.8dbm = llOmw；
一 =蘭 和 „ ；蘭 w； IQ. m = 120 和 ― P, P,ptlccH = YldBm；
从上面示例性的内容项可以看出， 本发明并不像现有的技术方 案那样仅发送如式 （4 ) 的一个内容项， 而是在特定于第 i个载波分 量的功率余量报告中分两项来分别发送关于 PUSCH和 PUCCH的发 送功率情况。 即， 本发明所提供的功率余量报告包括与 PUSCH发送 功率和 PUCCH发送功率有关的内容项，从而克服了现有的技术方案 中所存在的缺陷， 而基站基于该功率余量报告可以做出正确的资源 分配或调度。
另外，需要指出的是尽管用户设备可能当前在第 i个载波分量上 仅发送 PUSCH, 但在用户设备处形成的特定于第 i个载波分量的功 率余量报告也可以涉及如上所述的第 i 个载波分量所允许的最大发 送功率、第 i个载波分量上当前的 PUSCH发送功率和潜在的 PUCCH 发送功率。 从而在将类似于上面的同时存在 PUSCH和 PUCCH时的 功率余量报告发送到基站时， 基站可以做出正确的资源分配或调度， 以 4更供未来在 PUSCH和 PUCCH上进行数据发送时使用。
现在返回到图 2的流程图， 在步骤 210 中， 向基站发送功率余 量报告。
优选地， 可以基于特定于每个载波分量的周期或事件来触发向 基站发送功率余量报告。 这里， 周期可以是若干个传输时间间隔或 例如以亳秒为单位的定时器值， 而事件例如可以是自前次功率余量 报告发送以来用户设备和基站之间的传输路径损耗的改变超出某个 预定的值或者用户设备已经执行了预定次数的功率控制命令。
图 3是示出根据本发明实施方式的发送功率余量报告的示意图。 如图 3中所示，在用户设备处分配有多个载波分量，如 CC1 CC2 . . . CCn, 其中每个载波分量具有特定于自身的触发（周期性的或事件性 的） ， 如触发 1、 触发 2、 . . .触发 n, 而针对于每个载波分量， 形成 有特定的功率余量报告， 如图中所示出的 PH1 PH2 . . .PHn等， 每个功率余量报告 PH1、 PH2、 . ， .ΡΗη包括有上面所提到的各种内 容项。 在相对应的 PUSCH上， 将包括在分组数据单元中的功率余量 报告发送到基站。 例如 > PH1在 PUSCH1上发送， ΡΗ2在 PUSCH2 上发送， . . . ， 而 ΡΗη在 PUSCHn上发送。
图 4 示出了根据本发明一个实施方式的接收功率余量报告的方 法的流程图。 其中， 在步骤 410 中， 在基站处接收来自于用户设备 的特定于每个载波分量的功率余量报告。 接着， 在步骤 420 中， 基 于接收到的所述功率余量报告确定所述每个载波分量上的物理上行 共享信道的功率谱密度和剩余的功率余量。 以下详细描述该确定过 程。
在基站接收到如上所述的涉及第 i 个载波分量所允许的最大发 送功率、 第 i个载波分量上当前的 PUSCH和 PUCCH发送功率 （或 潜在的 PUCCH 发送功率） 的功率余量报告后， 其可以确定
^"=1 ^ = 80^并且 P,msa{ ^Mbm = \2Qmw , 并确定剩余的功率余量是
Figure imgf000010_0001
,接着用户设备处的 PUSCH上的功率谱密度可以通 过如下计算得到：
PSDi = 獻" - 101ogI0 MPUSCH{i) =20.8dBm- 101ogi04- 14.8dBm (5) 在上式中^ _设资源单元数目 M为 4。 进一步， 基站可以才艮据下 式确定将要分配给用户设备的第 i个载波分量的资源单元数目 M，：
10*log10(M')= p - PSD, (6)
另外， 基站还可以基于用户设备发送的功率余量报告确定合适 的调制编码方案。 具体地， 基站根据导出的功率谱密度 ^和测量的 信道质量， 得到 PUSCH的信干噪比， 从而确定用户设备将使用的对 应于该信干噪比的调制编码方案。
需要指出的是， 上面的公式计算及数值仅仅是示例性的， 目的 在于解释本发明的原理。 为了避免不必要的混淆本发明并且简化描 述， 在此省略了本领域技术人员所已知的 4既念、 公式、 计算过程或 步骤。
图 5 是示出根据本发明一个实施方式的用于发送功率余量报告 的设备 500的筒化框图。 如图 5中所示， 该设备 500包括形成装置 510和发送装置 520。 其中， 形成装置 510用于在用户设备处形成特 定于每个载波分量的功率余量报告， 详细的形成过程可以参见上面 结合图 2所做出的描述； 而发送装置 520用于向基站发送功率余量 报告。
图 6 是示出根据本发明一个实施方式的用于接收功率余量报告 的设备 600的简化框图。 如图 6中所示， 该设备 600包括接收装置 610和确定装置 620。 其中， 接收装置 610用于在基站处接收来自于 用户设备的特定于每个载波分量的功率余量报告； 而确定装置 620 用于基于接收到的所述功率余量报告确定所述每个载波分量上的物 理上行共享信道的功率语密度和剩余的功率余量， 详细的确定过程 可以参见上面结合图 4所做出的描述。
尽管此处以 LTE-A无线通信系统为例来描述本发明， 但本发明 可以应用于在用户设备侧执行功率控制且存在多个载波分量的任意 无线通信系统中。 另外， 根据本发明， 对于 LTE-A中存在一个或多 个功率放大器的情况， 特定于载波分量的功率余量报告涉及特定于 载波分量的最大发送功率与该载波分量上使用的功率的差值， 而该 特定于载波分量的最大发送功率并不与用户设备的总的发送功率关 联， 基站在进行资源调度时只需要注意所有载波分量上的最大发送 功率之和不应超出用户设备的总的发送功率即可。 也就是说， 本发 明的形成特定于载波分量的功率余量报告机制并不受一个或多个功 率放大器情况的影响。
以上结合附图对本发明的实施方式进行了描述。 应当注意， 为 了使本发明更容易理解， 上面的描述省略了对于本领域的技术人员 来说是公知的、 并且对于本发明的实现可能是必需的更具体的一些 技术细节。
本发明可以釆取完全硬件实现、 完全软件实现或者同时包含硬 件单元和软件单元的实现的形式。 在优选的实施方式中， 本发明是 以软件实现的， 该软件包括但不限于固件、 驻留软件、 微代码等。 提供本发明的说明书的目的是为了说明和描述， 而不是用来穷 举或将本发明限制为所公开的形式。 对本领域的普通技术人员而言， 许多修改和变更都是显而易见的。
因此， 选择并描述实施方式是为了更好地解释本发明的原理及 其实际应用， 并使本领域普通技术人员明白， 在不脱离本发明实盾 的前提下， 所有修改和变更均落入由权利要求所限定的本发明的保 护范围之内。

Claims

权 利 要 求 书
1. 一种用于发送功率余量报告的方法， 所述方法包括： 在用户设备处形成特定于每个载波分量的功率余量报告， 以及 向基站发送所述功率佘量报告。
2. 根据权利要求 1 所述的方法， 其中所述功率余量报告包括在 发送于所述载波分量上的物理上行共享信道的分组数据单元中。
3. 根据权利要求 1 所述的方法， 其中基于特定于每个载波分量 的周期或事件来触发向所述基站发送所述功率余量报告。
4. 根据权利要求 3 所述的方法， 其中所述周期是若千个传输时 间间隔或某个定时器值。
5. 根据权利要求 3 所述的方法， 其中所述事件是自前次功率余 量报告发送以来所述用户设备和基站之间的传输路径损耗的改变超 出某个预定的值或者所述用户设备已经执行了预定次数的功率控制 命令。
6. 根据权利要求 1 所述的方法， 其中所述功率余量报告包括与 物理上行共享信道发送功率和物理上行控制信道发送功率有关的内 容项。
7. 一种用于接收功率余量报告的方法， 所述方法包括： 在基站处接收来自于用户设备的特定于每个载波分量的功率余 量报告； 以及
基于接收到的所述功率余量报告确定所述每个载波分量上的物 理上行共享信道的功率谱密度和剩余的功率余量。
8. 根据权利要求 7所述的方法， 其中所述功率余量报告包括与 物理上行共享信道发送功率和物理上行控制信道发送功率有关的内 容项。
9. 根据权利要求 7所述的方法， 其中所述方法进一步包括： 基于物理上行共享信道的功率谱密度和剩余的功率余量来确定 将分配给所述每个载波分量的资源单元数目和调制编码方案。
10, —种用于发送功率余量报告的设备， 所述设备包括： 形成装置，用于在用户设备处形成特定于每个载波分量的功率余 量 4艮告， 以及
发送装置， 用于向基站发送所述功率余量报告。
1 1. 根据权利要求 10所述的设备， 其中所述功率余量报告包括 在发送于所述载波分量上的物理上行共享信道的分组数据单元中。
12. 根据权利要求 10所述的设备， 其中所述发送装置基于特定 于每个载波分量的周期或事件来向所述基站发送所述功率余量报 告。
13. 根据权利要求 12所述的设备， 其中所述周期是若千个传输 时间间隔或某个定时器值。
14. 根据权利要求 12所述的设备， 其中所述事件是自前次功率 余量报告发送以来所述用户设备和基站之间的传输路径损耗的改变 超出某个预定的值或者所述用户设备已经执行了预定次数的功率控 制命令。
15. 根据权利要求 10所述的设备， 其中所述功率余量报告包括 与物理上行共享信道发送功率和物理上行控制信道发送功率有关的 内容项。
16. —种用于接收功率余量报告的设备， 所述设备包括： 接收装置，用于在基站处接收来自于用户设备的特定于每个载波 分量的功率余量报告；
确定装置，用于基于接收到的所述功率余量报告确定所述每个载 波分量上的物理上行共享信道的功率谱密度和剩佘的功率余量。
17. 根据权利要求 16所述的设备， 其中所述功率余量报告包括 与物理上行共享信道发送功率和物理上行控制信道发送功率有关的 内容项。
18. 根据权利要求 16所述的设备， 其中所述确定装置进一步用 于基于物理上行共享信道的功率谱密度和剩余的功率余量来确定将 分配给所述每个载波分量的资源单元数目和调制编码方案。
PCT/CN2010/070673 2010-02-11 2010-02-11 用于发送和接收功率余量报告的方法和设备 WO2011097819A1 (zh)

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ES18194380T ES2848867T3 (es) 2010-02-11 2010-02-11 Procedimiento y dispositivo para transmitir y recibir informes de margen de potencia
US13/577,786 US9036494B2 (en) 2010-02-11 2010-02-11 Method and device for transmitting and receiving power headroom report
EP10845493.5A EP2536199A4 (en) 2010-02-11 2010-02-11 METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING A POWER MARGIN RATIO
CN201080055114.6A CN102687552B (zh) 2010-02-11 2010-02-11 用于发送和接收功率余量报告的方法和设备
EP18194380.4A EP3432651B1 (en) 2010-02-11 2010-02-11 Method and device for transmitting and receiving power headroom report
BR112012019986-2A BR112012019986B1 (pt) 2010-02-11 2010-02-11 Método e dispositivo para transmitir e receber relatório de valor não distorcido máximo de potência

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BR112012019986A2 (pt) 2021-09-21
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