WO2012145974A1 - 功率余量报告触发方法及装置 - Google Patents

功率余量报告触发方法及装置 Download PDF

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Publication number
WO2012145974A1
WO2012145974A1 PCT/CN2011/077886 CN2011077886W WO2012145974A1 WO 2012145974 A1 WO2012145974 A1 WO 2012145974A1 CN 2011077886 W CN2011077886 W CN 2011077886W WO 2012145974 A1 WO2012145974 A1 WO 2012145974A1
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Prior art keywords
user equipment
power
power headroom
power management
timer
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PCT/CN2011/077886
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English (en)
French (fr)
Inventor
刘扬
黄亚达
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中兴通讯股份有限公司
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Publication of WO2012145974A1 publication Critical patent/WO2012145974A1/zh

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Classifications

    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for triggering a power headroom report.
  • wireless communication systems use electromagnetic waves to communicate with fixed or mobile wireless communication user equipment (e.g., wireless telephones or devices such as notebooks, computers with wireless communication cards, etc., may be referred to as user equipment).
  • a User Equipment UE
  • the wireless communication channel divides the electromagnetic wave frequency into a plurality of carrier frequencies, and one carrier frequency or a plurality of carrier frequencies may constitute a wireless service area.
  • the user equipment can communicate with other devices in the system (such as control network elements or other user equipments) through one or more carriers.
  • the control network element of the wireless communication system can control other devices according to the communication protocol/technology agreed upon by the system.
  • the control network element includes a control station and a network.
  • the control station includes, but is not limited to, a base station (BS), a relay station (RS), and a user equipment.
  • BS base station
  • RS relay station
  • the user equipment may be selected in the user equipment according to a predetermined rule. As a temporary control station.
  • Communication protocols/technologies include, but are not limited to, GSM (Global System for Mobile Communications), CDMA (Code Division Multiple Access), EDGE (Enhanced Data Rate for GSM Evolution), Enhanced Data Rate for GSM Evolution Technology), CDMA2000, TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), HSPA (High Speed Packet Access), WCDMA (Wideband Code Division Multiple Access) Multiple Access), EVDO (Evolution Data Only), HSOPA (High Speed OFDM Packet Access), WiMAX (World Interoperability for Microwave Access) LTE (Long Term Evolution) and LTE-A (LTE-Advanced, Long Term Evolution - Advanced).
  • a wireless communication system can provide wireless coverage over a geographic area by a base station using a designated wireless channel, which is referred to as a cell.
  • the base station should be located in the center of the cell.
  • the base station can be divided into a macro base station, a micro (Pico) base station, and a femto base station.
  • a base station is also referred to as an enhanced Node B (eNodeB), and a pico base station is also referred to as a Home Base Station or a Home Enhanced Node Node (HeNodeB).
  • eNodeB enhanced Node B
  • HeNodeB Home Enhanced Node Node
  • one or more relay stations can be placed between the user equipment and the base station.
  • a relay station is equivalent to a base station.
  • the user equipment may also constitute an ad hoc network (or cluster), and a user equipment in the ad hoc network serves as a temporary control station to assist the system in management and temporary control.
  • the station can accept the control of the original control station and manage the subordinate user equipment.
  • the main processes of LTE uplink power control are:
  • the UE receives a TPC (transmitting power control);
  • the UE (user equipment) performs measurement of the received power of the downlink radio channel pilot, and calculates the path loss Pathless.
  • the UE calculates the transmit power P by using parameters such as Pathloss, uplink shared channel bandwidth, transport block format, and TPC; if the user equipment triggers PHR (power headroom report), and meet the transmission conditions, then the UE also needs to send the PHR on the uplink shared channel.
  • PHR power headroom report
  • the eNodeB (evolved base station) sends a TPC to the UE through the physical downlink control channel of the DCI Format 0/3/3A; and returns to the execution step (1).
  • the UE adopts a dynamic resource allocation mode and adopts adaptive modulation and coding (AMC).
  • AMC adaptive modulation and coding
  • the uplink transmit power of the LTE UE is related to the resource allocation and coding and modulation modes. Therefore, the individual power control modes are insufficient.
  • the PHR sent by the UE to the eNodeB is used as the resource budget information of the PUSCH, and provides a basis for the eNodeB to perform uplink resource allocation.
  • the eNodeB can allocate more radio resource blocks to the UE. If the PHR reflects that the UE has no power headroom, or does not have more power headroom, then the eNodeB can only Less radio resource blocks or low order modulation commands are allocated to the UE.
  • the PHR transmission frequency of the UE to the eNodeB is lower than the TPC transmission frequency of the eNodeB to the UE.
  • the sending of the PHR requires two steps: first, triggering, then reporting.
  • the UE triggers the PHR report when the periodic PHR timer expires or the path loss changes greatly or the PHR configuration/reconfiguration. After the UE obtains sufficient PUSCH resources for the PHR, the UE reports the PHR to the eNodeB.
  • PHR P CMAX -P ue tx
  • ⁇ 0 ⁇ is the configured maximum output power of the UE, PCMAX_L ⁇ PCMAX ⁇ PCMAX_H
  • PCMAX_L the configured maximum output power of the UE
  • PCMAX_H the configured maximum output power of the UE
  • the eNodeB controls the maximum transmit power of the UE to reduce the interference of the UE to the neighboring cell
  • the UE can design a responsible filter.
  • the UE reduces the maximum transmit power.
  • the former increases the cost of the UE, and the latter reduces the uplink capability of the UE.
  • the method of reducing the transmission power also called power reduce, PR
  • PR power reduce
  • a large number of UEs will adopt this method to achieve the requirement of out-of-band radiation.
  • the UE is not allowed to reduce power indefinitely, so that basic uplink services cannot be performed.
  • the maximum MPR Maximum Power Reduction
  • the size is related to the modulation and demodulation configuration of the transmitted data, and the occupied bandwidth. For example, in LTE, in protocol 36.101, different MPRs are set according to different transmission bandwidths and modem modes, as shown in Table 1 below: Set the actual PR value according to its own implementation, as long as PR ⁇ MPR is satisfied. Table 1
  • the UE subtracts the actual power backoff value based on the rated transmit power Ppowerclass, and also needs to consider the maximum transmit power allowed by the above network, taking the minimum of the two as the actual PCMAX.
  • the PHR is in dB and the power in the formula is in dBm.
  • the triggers reported by PHR mainly have the following three cases:
  • the PHR prohibit timer (prohibitPHR-Timer) times out, and the path loss is greater than the predetermined threshold dl-PathlossChange (in decibels dB) relative to the previous threshold of the PHR.
  • the PHR period timer (periodicPHR-Timer) times out;
  • the source of the power adjustment may be a regional SAR (Specific Absorption Rate), and the SAR requirement includes a power requirement of the user equipment when the power is close to the human body or the transmitter needs to work before the dual transmitter works. Adjustment and so on. Due to the MAX change caused by the power management of the user equipment, correspondingly, PH changes may occur. In this new situation, how the eNodeB and the user equipment evaluate the power headroom and how the user equipment performs the PHR report is an urgent problem to be solved. .
  • SAR Specific Absorption Rate
  • the current technology believes that a trigger condition should be set separately, the PHR prohibit timer (prohibitPHR-Timer) times out, and the user equipment power management value is greater than the DL-PathlossChange when the previous PHR reported the change amount. It is necessary to trigger the PHR.
  • the problem with this is: Since the threshold for reporting the amount of change is the same as the threshold for the existing path loss, the change in the power management value is actually independent of the path loss change, so the triggered PHR can easily cause false or missed reports, resulting in Resource waste or estimation error in power adjustment. In addition, if the change of the power variation in the SAR scenario is too frequent, the related PHR may be reported too much.
  • a primary object of the present invention is to provide a method and apparatus for triggering a power headroom report to at least solve the problem of inaccurate power headroom reporting in the prior art described above.
  • a power headroom report triggering method including: after a power headroom report timer expires, a user equipment triggers a power headroom report of a user equipment according to a user equipment power management influence; wherein, the user Device power management affects the amount of power change caused by user equipment power management.
  • the amount of power change caused by the power management of the user equipment is: the amount of power change caused by the power management that occurs at the current time relative to the last reported virtual power headroom reporting time.
  • the amount of power change caused by the power management of the user equipment is: the amount of power change caused by the power management that occurs at the current time relative to the last reported non-virtual power headroom reporting time.
  • the method before the power consumption report of the user equipment is triggered by the user equipment power management, the method further includes: performing filtering processing on the power management impact of the user equipment.
  • the filtering process is a layer three filtering process or a filtering process by a method of triggering the time TTT.
  • the user equipment triggers the power headroom report of the user equipment according to the power management of the user equipment, including: determining whether the power management impact of the user equipment is greater than a predetermined threshold, where the predetermined threshold is not equal to the downlink path loss threshold. ; If yes, trigger the power headroom report of the user equipment.
  • the predetermined threshold is less than the downlink path loss threshold.
  • the timeout period of the power headroom reporting timer is not equal to the timeout period of the power headroom reporting prohibition timer prohibitPHR-Timer.
  • the power headroom reporting timer is a power headroom reporting prohibition timer prohibitPHR-Timer.
  • a power headroom report triggering apparatus including: a power headroom reporting timer; and a triggering module configured to: after a power headroom reporting timer expires, according to user equipment power management impact and The path loss affects the reporting of the power headroom reported by the user equipment.
  • the power headroom report triggering further includes: a filtering module, configured to perform filtering processing on the power management impact of the user equipment.
  • the triggering module includes: a determining submodule, configured to determine whether the power management impact of the user equipment is greater than a predetermined threshold, wherein the predetermined threshold is not equal to the downlink path loss threshold; the triggering submodule is set to be in the user
  • the power headroom report of the user equipment is triggered.
  • the user equipment power headroom report is triggered according to the impact of the user equipment power management, which solves the problem of inaccurate power headroom reporting in the prior art, so that the base station side can make correct power adjustment according to the reported power headroom. , and thus achieve the effect of saving power adjustment overhead.
  • FIG. 1 is a flowchart of a power headroom report triggering method according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of a power headroom report triggering method according to Embodiment 2 of the present invention
  • FIG. 3 is a flowchart according to the present invention.
  • FIG. 4 is a structural block diagram of a power headroom report triggering apparatus according to Embodiment 4 of the present invention
  • FIG. 5 is a structural block diagram of a power headroom report triggering apparatus according to Embodiment 5 of the present invention.
  • Step S104 After the power headroom reporting timer expires, the user equipment triggers the reporting of the power headroom report by the user equipment according to the power management of the user equipment; wherein, the user equipment power management affects the power variation value caused by the power management of the user equipment;
  • the user equipment power headroom report is triggered according to the power management impact of the user equipment, which solves the problem that the power headroom report is inaccurate in the prior art, so that the base station side can make correct power adjustment according to the reported power headroom. , and thus achieve the effect of saving power adjustment overhead.
  • the power headroom report timer in step S102 may be a timer in the prior art, such as a PHR prohibit timer (prohibitPHR-Timer), or may be a timer different from the prior art, and the timer is set to timeout. The time is less than or equal to the prohibitPHR-Timer timeout period.
  • filtering the instantaneous user equipment power management impact may be filtered to filter out frequently changing user equipment power impacts.
  • User equipment power management affects the amount of power change caused by user equipment power management, for example, the amount of power back-off that is limited to P-MPR, or the amount of change in P-MPR.
  • the predetermined threshold value in step S104 is a threshold value different from the existing downlink path loss change threshold value dlPathlossChange.
  • the threshold value may be independent of the downlink path loss change threshold value or may be related to the downlink path loss change threshold value.
  • the threshold is dlPathlossChange minus or plus an offset value.
  • Step S204 determining whether the power headroom timer has timed out.
  • Step S206 If the timer of the power headroom report expires, further determine whether the power management impact of the user equipment is greater than a predetermined threshold.
  • Step S208 if yes, triggering the user equipment power headroom report and restarting the power headroom report timer.
  • the power consumption of the user equipment affects the power variation caused by the power management of the user equipment, for example, the power backoff amount limited to the P-MPR, or the amount of change of the P-MPR.
  • the timer of the power headroom report may be a PHR prohibit timer (prohibitPHR-Timer) in the prior art.
  • the timer is a timer different from the prior art, and the timeout period of the timer is less than the PHR prohibit timer of the same period.
  • the predetermined threshold is different from the downlink loss change threshold (for example, dl-PathlossChange) in the prior art.
  • the predetermined threshold value may be set to a relative value of a predetermined threshold in the prior art. For example, the existing downlink path loss change threshold plus a predetermined negative or positive parameter value or the existing downlink loss change threshold is multiplied by a parameter less than or greater than 1 or directly set a lower than existing An independent threshold with a small or large threshold for changing the path loss.
  • Embodiment 3 3 is a flowchart of a method for triggering a power headroom report according to a third embodiment of the present invention. As shown in FIG. 3, the steps of the third embodiment are basically the same as those of the second embodiment, except that: the trigger power margin is increased before reporting.
  • the filtering step of the power variation step S306, to filter out the frequently changing user equipment power impact.
  • the filtering method may be an existing technology, for example, an L3 filtering method, and the power variation value of the user equipment power management value at a sampling time of a certain period, for example, 20 ms.
  • P-MPR_L a*P-MPR_L_old+( 1 -a) *P-MPR_new , where a ⁇ l, P-MPR_new is the user equipment power management value at the new sampling instant, and P-MPR——L is the filtering User equipment power management value, P-MPR_L_old is the user equipment power management value before sampling. Or it is filtered by the method of time to trigger (TTT), that is, after adding a specified time period ⁇ to the original trigger mechanism, when the power change amount changes beyond a predetermined threshold, ⁇ starts to start. If the condition persists for one cycle, the user equipment performs a PHR.
  • TTTT time to trigger
  • FIG. 4 is a structural block diagram of a power headroom report triggering apparatus according to Embodiment 4 of the present invention.
  • the apparatus includes: a power headroom reporting timer 20 and a triggering module 30.
  • the power headroom report timer 20 is coupled to the trigger module 30.
  • the triggering module 30 is configured to trigger the reporting of the power headroom reported by the user equipment according to the impact of the power management of the user equipment after the power headroom reporting timer expires.
  • FIG. 5 is a structural block diagram of a power headroom report triggering apparatus according to Embodiment 5 of the present invention. As shown in FIG.
  • the triggering module 30 further includes: a determining submodule 301 and a triggering submodule 302, in addition to the functional modules in the fourth embodiment.
  • the determining sub-module 301 is configured to determine whether the power management impact of the user equipment is greater than a predetermined threshold, where the predetermined threshold is greater than or less than a downlink path loss threshold.
  • the triggering sub-module 302 is configured to trigger a power headroom report of the user equipment if the power management impact of the user equipment is greater than a predetermined threshold.
  • the processing flow of the embodiment is the same as that of the first embodiment, that is, after the power headroom report timer expires, the user equipment triggers the report of the power headroom reported by the user equipment according to the power management impact; wherein, the user equipment power management influence is the user The power change value caused by device power management.
  • the predetermined threshold is a new threshold different from the existing downlink loss change threshold dlPathlossChange.
  • the new threshold value may be independent of the downlink path loss change threshold value, or may be related to the downlink path loss change threshold value, such as the new threshold is dlPathlossChange minus or plus an offset value.
  • the power consumption of the user equipment affects the power change value that is actually caused by the power management when the current time is compared with the previously reported virtual power headroom. That is, when in the carrier aggregation scenario, when the power headroom reported at time n is virtual, the P-MPR is artificially set to 0. At the time of n', the actual P-MPR judgment n is actually used. n' change. Or the user equipment power management affects the power change value due to power management that actually occurs at the current time relative to the previously reported non-virtual power headroom (when there is P-MPR and is not artificially set to 0).
  • the power headroom report of the user equipment is triggered according to the impact of the power management of the user equipment, which solves the problem that the power headroom report in the prior art is inaccurate.
  • the problem is that the base station side can make correct power adjustment according to the reported power headroom, thereby achieving the effect of saving power adjustment overhead.
  • the computing device may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明提供了一种功率余量报告触发方法及装置，该方法包括：在功率余量报告定时器超时后，用户设备根据用户设备功率管理影响触发用户设备上报功率余量报告；其中，用户设备功率管理影响为用户设备功率管理所造成的功率变化值。在本发明中，根据用户设备功率管理影响来触发用户设备功率余量报告，解决了现有技术中功率余量报告不准确的问题，使得基站侧能够根据上报的功率余量作出正确的功率调整，进而达到了节省功率调整开销的效果。

Description

功率余量报告触发方法及装置 技术领域 本发明涉及通信领域， 具体而言， 涉及一种功率余量报告触发方法及装置。 背景技术 目前， 无线通信***使用电磁波与固定的或者移动的无线通信用户设备 （例如， 无线电话或附有无线通信卡的笔记本、 电脑等设备均可被称为用户设备） 进行通信。 一般来说， 在进行无线通信时， 用户设备 （User Equipment, 简称 UE) 位于***的无 线覆盖范围之内， 并通过无线通信信道与***进行通信。 具体的， 无线通信信道将电 磁波频率分成多个载波频率，一个载波频率或多个载波频率可以构成一个无线服务区。 用户设备可以通过一个或多个载波同***中的其他设备 （例如控制网元或其他用户设 备） 联系。 无线通信***的控制网元可以根据***约定的通信协议 /技术控制其他设备。控制 网元包括控制站和网络。 控制站包括但不限于基站 （Base Station, 简称 BS)、 中继站 (Relay Station, 简称 RS) 和用户设备， 当用户设备用做控制站时， 该用户设备可以 是根据预定规则在用户设备中挑选的作为临时的控制站。通信协议 /技术包括但不限于 GSM (Global System for Mobile Communications, 全球移动通信***）、 CDMA ( Code Division Multiple Access, 码分多址）、 EDGE (Enhanced Data Rate for GSM Evolution, 增强型数据速率 GSM演进技术）、 CDMA2000、TD-SCDMA(Time Division-Synchronous Code Division Multiple Access, 时分同步码分多址）、 HSPA (High Speed Packet Access, 高速分组接入）、 WCDMA (Wideband Code Division Multiple Access, 宽带码分多址）、 EVDO (Evolution Data Only,仅演进数据）、 HSOPA (High Speed OFDM Packet Access, 高速正交频分复用分组接入）、 WiMAX ( World Interoperability for Microwave Access, 微波存取全球互通）、 LTE (Long Term Evolution,长期演进）和 LTE- A (LTE- Advanced, 长期演进-高级）。 无线通信***可以通过基站利用指定的无线信道在一定地理范围内提供无线覆 盖， 这个地理范围称为小区。 通常， 从理论上来说， 基站应该位于小区的中央。 按照 基站覆盖范围的大小，基站可以分成宏 (Macro)基站、微 (Pico)基站和微微 (Femto)基站。 在 LTE/LTE-A***中， 基站也称为增强 B节点 （eNodeB), 微微基站也称为家庭基站 或者家庭增强 B节点 （Home eNodeB, 简称 HeNodeB)。 此外， 为了扩展覆盖或者扩展容量， 一个或多个中继站可以放置在用户设备和基 站之间。 对于用户设备来说， 中继站就相当于一个基站。 或者， 在用户设备数量极多 的网络中， 用户设备也可以自行组成 ad hoc网络 （或者称为 cluster) , 由 ad hoc网络 中的某个用户设备作为临时控制站， 协助***进行管理， 临时控制站可以接受原有控 制站控制， 管理下属的用户设备。
LTE的上行功率控制的主要过程为：
( 1 ) UE接收到 TPC (transmitting power control, 功率控制命令）；
( 2 ) UE (用户设备） 进行下行无线信道导频接收功率的测量， 计算路径损耗 Pathless, UE以 Pathloss、 上行共享信道带宽、 传输块格式和 TPC等参数计算发射功 率 P; 如果用户设备触发了 PHR ( power headroom report, 功率余量报告）， 并满足发 送条件， 那么 UE还需要在上行共享信道上发送 PHR。
( 3 ) eNodeB (演进型基站）收到物理上行共享信道和 /或 PHR后，通过 DCI Format 0/3/3A的物理下行控制信道向 UE发送 TPC; 返回执行步骤 （ 1 )。 ***中 UE 采用动态的资源分配方式， 并且采用自适应的信道编码调制方式 ( adaptive modulation and coding, AMC)， LTE UE上行发射功率与资源分配、 编码调 制方式相关， 因此单独的功率控制方式还不足以完成 LTE UE的功率控制任务， 通过 UE向 eNodeB发送的 PHR作为 PUSCH的资源预算信息， 为 eNodeB进行上行链路资 源分配提供依据。 如果 PHR反映出 UE有较大的功率余量， 那么 eNodeB可以分配较 多的无线资源块给 UE; 如果 PHR反映出 UE已经没有功率余量， 或者没有较多的功 率余量， 那么 eNodeB只能分配较少的无线资源块或者低阶调制命令给 UE。
LTE***中 UE向 eNodeB的 PHR发送频率低于 eNodeB向 UE的 TPC发送频率。 PHR的发送需要有两个步骤： 首先是触发， 然后是上报。 UE在周期 PHR定时器到期 时或者路损变化较大或者 PHR配置 /重配置时触发 PHR上报， 当 UE获得了足够用于 PHR的 PUSCH资源后， UE向 eNodeB上报 PHR。 PHR的计算为 PH ( ) = PCMAX -Pue tx， ^0ΜΑΧ为 UE配置最大发射功率（ configured maximum output power) , PCMAX_L≤PCMAX<PCMAX_H, PCMAX的取值范围主要 有 2种受限因素： 1 ) 受限于 eNodeB的控制， 比如在微基站的小覆盖场景， eNodeB 会控制 UE的最大发射功率， 以减少 UE对邻区的干扰； 2 ) UE的无用带外辐射 （Out of band emission) ,如为了满足 SEM ( Spectmm emission mask,频谱发射屏蔽）和 ACLR ( Adjacent Channel Leakage Ratio, 邻带泄露比）等要求， UE可以设计负责的滤波器， 用来减少带外辐射， 或者 UE降低最大发射功率， 前者会增加 UE的成本， 后者降低 了 UE的上行能力。 由于降低发射功率（也称为功率回退， power reduce, PR) 的方法 简单有效， 大量 UE在实现时会采用该方法来达到带外辐射的要求。不过为了保证 UE 的上行发送能力， 不允许 UE无限制的降低功率， 以至于不能进行基本的上行业务， 协议中定义允许的 MPR ( Maximum Power Reduction, 最大功率回退值）， 由于带外辐 射的大小跟发送数据的调制解调配置，以及占用的带宽都有关系，如 LTE在协议 36.101 中， 按不同的发送带宽和调制解调模式设置了不同的 MPR， 如下表 1所示： 各 UE可 以按自身的实现设置实际的 PR值， 只要满足 PR≤MPR即可。 表 1
Figure imgf000005_0001
所以考虑到功率回退后， UE在额定的发射功率 Ppowerclass的基础上减去实际的 功率回退值， 并且还需要考虑上述的网络允许的最大发射功率后， 取两者中的最小值 为实际的 PCMAX。 为 UE上行理论发射功率。在 LTE中， PHR中只考虑 PUSCH 的发射功率， 所以^ ^ = ^e,^cA， ^^ ^在！^^中为 PUSCH的发射功率， 定义
,pusch = 101og10( PUSCH( )) + o PUSCH (t) +a(t) - PL +AT¥(i) + f(i) ， 其 中 的 PUSCH (i)为 PUSCH的发送带宽由调度的 MCS ( Modulation and Coding Scheme, 调制 编码格式）配置决定、 PUSeH(0为开环功控调整值、 《(0为部分路损补偿值、 t为半 静态变量、 为路损、 ATF(0为传输格式补偿值、 /(0为闭环功控调整值， 即 PUSCH 的发射功率跟 PUSCH的占用资源的带宽， UE和基站间的路损以及开环功控和闭环功 控 的 配 置 相 关 。 所 以 PHR 计 算 公 式 为 PH (i) =PCUAK -{ 101og10 ( PUSCH( )) +P0 ¥USCll(t)+a{t) - Ζ+Δ^ ( )+ ( ) }。
PHR的以 dB为单位， 公式中功率以 dBm为单位。 在 LTE中， PHR上报的触发 （trigger) 主要有以下三种情况：
1) PHR禁止定时器（prohibitPHR-Timer)超时， 并且路损相对于上一次 PHR上报 的变化量大于预定门限值 dl-PathlossChange (单位是分贝 dB ) 时； 2) PHR周期定时器 （periodicPHR-Timer) 超时;
3) PHR功能实体的配置或重配置； 当 PHR被触发后， 当 UE有上行调度资源可以容纳 PHR时， UE将 PHR发送给 e B o 随着通信技术的发展， 由于用户设备功率管理造成的 MAX变化也需要考虑到
PHR 的计算中。 具体的， 这种功率调整的要求来源可以是区域吸收率要求 (regional SAR, Specific Absorption Rate), SAR requirement场景包括用户设备靠近人体时功率 需要下调或者双发射机工作时之前工作的发射机功率需要调整等。 由于用户设备功率管理造成 MAX变化， 相应的， 有可能造成 PH变化， 这种新 情况下， eNodeB和用户设备如何进行功率余量的评估，用户设备如何进行 PHR上报， 都是亟需解决的问题。 对于上述所存在的问题， 目前有技术认为， 应该单独设置一个触发条件， PHR禁 止定时器（prohibitPHR-Timer)超时， 并且用户设备功率管理值相对于上一次 PHR上 报的变化量大于 dl-PathlossChange时就需要触发 PHR。 这样做的问题是： 由于上报变化量的门限和现有路损变化量门限一样， 但是功率 管理值的变化实际上和路损变化无关， 因此触发的 PHR很容易造成虚报或者漏报， 从 而导致功率调整上的资源浪费或者估计错误。 此外，对于 SAR场景中的功率变化量变化如果过于频繁，可能会造成相关的 PHR 上报太多， 由于 PHR的调整需要时间， 太频繁的 PHR不仅不能达到迅速功率调整的 目的， 而且会浪费用于功率调整的开销的资源。 发明内容 本发明的主要目的在于提供一种功率余量报告触发方法及装置， 以至少解决上述 现有技术中的功率余量报告不准确的问题。 根据本发明的一个方面， 提供了一种功率余量报告触发方法， 包括： 在功率余量 报告定时器超时后， 用户设备根据用户设备功率管理影响触发用户设备的功率余量报 告； 其中， 用户设备功率管理影响为用户设备功率管理造成的功率变化量。 优选地， 用户设备功率管理造成的功率变化量为： 当前时刻相对于上一次上报虚 拟功率余量报告时刻， 所发生的由于功率管理导致的功率变化量。 优选地， 用户设备功率管理造成的功率变化量为： 当前时刻相对于上一次上报非 虚拟功率余量报告时刻， 所发生的由于功率管理导致的功率变化量。 优选地，根据用户设备功率管理影响触发用户设备的功率余量报告之前，还包括: 对用户设备功率管理影响进行滤波处理。 优选地， 滤波处理为层三滤波处理或者用触发时刻 TTT的方法进行滤波处理。 优选地， 用户设备根据用户设备功率管理影响触发用户设备的功率余量报告， 包 括： 判断用户设备功率管理影响是否大于预定门限值， 其中， 预定门限值不等于下行 路损变化门限值； 如果是， 则触发用户设备的功率余量报告。 优选地， 预定门限值小于下行路损变化门限值。 优选地， 功率余量报告定时器的超时时间不等于功率余量报告禁止定时器 prohibitPHR-Timer的超时时间。 优选地， 功率余量报告定时器为功率余量报告禁止定时器 prohibitPHR-Timer。 根据本发明的另一方面， 提供了一种功率余量报告触发装置， 包括： 功率余量报 告定时器； 触发模块， 设置为在功率余量报告定时器超时后， 根据用户设备功率管理 影响和路损影响触发用户设备上报功率余量报告。 优选地， 功率余量报告触发还包括： 滤波模块， 设置为对用户设备功率管理影响 进行滤波处理。 优选地， 触发模块包括： 判断子模块， 设置为判断用户设备功率管理影响是否大 于预定门限值， 其中， 预定门限值不等于下行路损变化门限值； 触发子模块， 设置为 在用户设备功率管理影响大于预定门限值的情况下， 触发用户设备的功率余量报告。 在本发明中， 根据用户设备功率管理影响来触发用户设备功率余量报告， 解决了 现有技术中功率余量报告不准确的问题， 使得基站侧能够根据上报的功率余量作出正 确的功率调整， 进而达到了节省功率调整开销的效果。 附图说明 此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部分， 本发 明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的不当限定。 在附图 中： 图 1是根据本发明实施例一的功率余量报告触发方法流程图； 图 2是根据本发明实施例二的功率余量报告触发方法流程图； 图 3是根据本发明实施例三的功率余量报告触发方法流程图； 图 4是根据本发明实施例四的功率余量报告触发装置结构框图； 图 5是根据本发明实施例五的功率余量报告触发装置结构框图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是， 在不冲突的 情况下， 本申请中的实施例及实施例中的特征可以相互组合。 实施例一 图 1是根据本发明实施例一的功率余量报告触发方法流程图， 如图 1所示， 包括 以下步骤： 步骤 S102， 判断功率余量报告定时器超时是否超时。 步骤 S104， 在功率余量报告定时器超时后， 用户设备根据用户设备功率管理影响 触发用户设备上报功率余量报告； 其中， 用户设备功率管理影响为用户设备功率管理 所造成的功率变化值； 在实施例一中， 根据用户设备功率管理影响来触发用户设备功率余量报告， 解决 了现有技术中功率余量报告不准确的问题， 使得基站侧能够根据上报的功率余量作出 正确的功率调整， 进而达到了节省功率调整开销的效果。 其中，步骤 S102中的功率余量报告定时器可以是现有技术中的定时器，例如 PHR 禁止定时器（prohibitPHR-Timer), 也可以是和现有技术不同的定时器， 定时器设置的 超时时间小于等于 prohibitPHR-Timer超时时间。 其中， 在步骤 S104中， 可以对瞬间的用户设备功率管理影响加上滤波， 过滤掉频 繁变化的用户设备功率影响。 用户设备功率管理影响为用户设备功率管理造成的功率 变化量， 例如， 受限于 P-MPR的功率回退量， 或者就是 P-MPR的变化量。 其中， 步骤 S104 中的预定门限值为不同于现有下行路损变化门限值 dlPathlossChange的门限值。该门限值可以独立于下行路损变化门限值设置， 也可以和 下行路损变化门限值相关， 例如， 该门限为 dlPathlossChange减去或加上一个偏移值。 其中， 触发用户设备功率余量报告完成后， 重新启动功率余量报告定时器。 实施例二 图 2是根据本发明实施例二的功率余量报告触发方法流程图， 如图 2所示， 包括 以下步骤： 步骤 S202, 启动功率余量报告定时器。 步骤 S204, 判断功率余量定时器是否超时。 步骤 S206, 如果功率余量报告的定时器超时， 进一步判断用户设备功率管理影响 是否大于预定门限值。 步骤 S208, 如果是， 则触发用户设备功率余量报告并且重新启动功率余量报告定 时器。 其中， 用户设备功率管理影响为用户设备功率管理造成的功率变化量， 例如， 受 限于 P-MPR的功率回退量， 或者就是 P-MPR的变化量。 其中， 功率余量报告的定时器可以是现有技术中的 PHR 禁止定时器 (prohibitPHR-Timer)。在本发明的另一实施例中，定时器是与现有技术不同的定时器， 定时器的超时时间小于同时期的 PHR禁止定时器。 其中， 预定门限值不同于现有技术中的下行路损变化门限值 （例如 dl-PathlossChange)。 在本实施例中， 可以设定该预定门限值为现有技术中的预定门限 的相对值。 例如， 现有下行路损变化门限值加上一个预定负值或正值参数值或者现有 下行路损变化门限值乘以一个小于或大于 1的参数或者直接设定一个比现有下行路损 变化门限值小或大的独立的门限值。 实施例三 图 3是根据本发明实施例三的功率余量报告触发方法流程图， 如图 3所示， 实施 例三与实施例二的步骤基本相同， 区别仅在于： 在触发功率余量上报前增加了对于功 率变化量的滤波步骤， 即步骤 S306, 以过滤掉频繁变化的用户设备功率影响。 其中， 滤波的方法可以是采用现有的技术， 例如 L3 滤波方式， 按一定周期采样 瞬间的用户设备功率管理值功率变化量， 如 20ms。 计算公式为： P-MPR_L=a*P-MPR_L_old+( 1 -a) *P-MPR_new , 其中 a<l， P-MPR_new为新采样瞬间 的用户设备功率管理值， P-MPR——L 为滤波后的用户设备功率管理值， P-MPR_L_old 为本次采样前用户设备功率管理值。 或者是用触发时刻（time to trigger, TTT)的方法 进行滤波， 即在原有的触发机制上再加一个指定的时段 ΤΤΤ， 功率变化量变化超过预 定门限时， ΤΤΤ开始启动。 如果所述条件持续了一个 ΤΤΤ周期， 用户设备进行 PHR。 特别的对于功率变化量上升超过预定门限时， 可以不使用上述滤波。 实施例四 图 4是根据本发明实施例四的功率余量报告触发装置结构框图。 如图 4所示， 该 装置包括： 功率余量报告定时器 20和触发模块 30。 功率余量报告定时器 20和触发模 块 30相连接。 其中， 触发模块 30， 设置为在功率余量报告定时器超时后， 根据用户设备功率管 理影响触发用户设备上报功率余量报告。 在实施例四中， 通过在触发用户设备功率余量报告时考虑用户设备功率管理影响 的门限， 从而解决了现有技术中功率余量报告不准确的问题， 使得基站侧能够根据上 报的功率余量作出正确的功率调整， 进而达到了节省功率调整开销的效果。 其中， 上述功率余量报告触发装置还可包括： 滤波模块 40， 设置为对用户设备功 率管理影响进行滤波处理。功率余量报告定时器 20也可采用现有的功率余量报告禁止 定时器 prohibitPHR-Timer。 实施例五 图 5是根据本发明实施例五的功率余量报告触发装置结构框图。 如图 5所示， 该 装置除包括实施例四中的各功能模块外， 触发模块 30 进一步包括： 判断子模块 301 和触发子模块 302。 其中， 判断子模块 301， 设置为判断用户设备功率管理影响是否大于预定门限值， 其中， 所述预定门限值大于或小于下行路损变化门限值。 触发子模块 302， 设置为在 用户设备功率管理影响大于预定门限值的情况下， 触发用户设备的功率余量报告。 实施例六 本实施的处理流程与实施例一相同， 即： 在功率余量报告定时器超时后， 用户设 备根据功率管理影响触发用户设备上报功率余量报告； 其中， 用户设备功率管理影响 为用户设备功率管理造成的功率变化值。 其中， 预定门限值为不同于现有下行路损变化门限值 dlPathlossChange 的新门限 值。 新门限值可以独立于所述下行路损变化门限值设置， 也可以和所述下行路损变化 门限值相关， 如新门限为 dlPathlossChange减去或加上一个偏移值。 其中， 触发用户设备功率余量报告完成后， 重新启动功率余量报告定时器。 在上述实施例中， 用户设备功率管理影响为当前时刻相对于之前上报虚拟功率余 量时刻， 实际发生的由于功率管理导致的功率变化值。 即当在载波聚合场景时， 在 n 时刻上报的功率余量是虚拟时， P-MPR被人为设定为 0， 在 n'时刻， 仍然使用实际的 n时刻实际发生的 P-MPR判断 n到 n'的变化。或者用户设备功率管理影响为当前时刻 相对于之前上报非虚拟功率余量时刻（有 P-MPR并且不被人为设定为 0时）实际发生 的由于功率管理导致的功率变化值。 在本发明的上述各实施例中， 为了满足用户设备功率管理带来的功率控制要求， 根据用户设备功率管理影响来触发用户设备功率余量报告， 解决了现有技术中功率余 量报告不准确的问题， 使得基站侧能够根据上报的功率余量作出正确的功率调整， 进 而达到了节省功率调整开销的效果。 显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布在多个计算装置所 组成的网络上， 可选地， 它们可以用计算装置可执行的程序代码来实现， 从而， 可以 将它们存储在存储装置中由计算装置来执行， 并且在某些情况下， 可以以不同于此处 的顺序执行所示出或描述的步骤， 或者将它们分别制作成各个集成电路模块， 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样， 本发明不限制于任 何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本领域的技 术人员来说， 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内， 所作的 任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种功率余量报告触发方法， 包括：
在功率余量报告定时器超时后， 用户设备根据用户设备功率管理影响触发 所述用户设备的功率余量报告；
其中， 所述用户设备功率管理影响为所述用户设备功率管理造成的功率变 化量。
2. 根据权利要求 1所述的方法， 其中， 所述用户设备功率管理造成的功率变化量 为：
当前时刻相对于上一次上报虚拟功率余量报告时刻， 所发生的由于功率管 理导致的功率变化量。
3. 根据权利要求 1所述的方法， 其中， 所述用户设备功率管理造成的功率变化量 为：
当前时刻相对于上一次上报非虚拟功率余量报告时刻， 所发生的由于功率 管理导致的功率变化量。
4. 根据权利要求 1所述的方法， 其中， 根据用户设备功率管理影响触发所述用户 设备的功率余量报告之前， 还包括：
对所述用户设备功率管理影响进行滤波处理。
5. 根据权利要求 4所述的方法， 其中， 所述滤波处理为层三滤波处理或者用触发 时刻 TTT的方法进行滤波处理。
6. 根据权利要求 1至 5任一项所述的方法， 其中， 用户设备根据用户设备功率管 理影响触发所述用户设备的功率余量报告， 包括：
判断所述用户设备功率管理影响是否大于预定门限值；
如果是， 则触发所述用户设备的功率余量报告。
7. 根据权利要求 6所述的方法，其中，所述预定门限值等于下行路损变化门限值。
8. 根据权利要求 6所述的方法， 其中， 所述预定门限值大于或小于下行路损变化 门限值。
9. 根据权利要求 6所述的方法， 其中， 所述功率余量报告定时器的超时时间不等 于功率余量报告禁止定时器 prohibitPHR-Timer的超时时间。
10. 根据权利要求 6所述的方法， 其中， 所述功率余量报告定时器为功率余量报告 禁止定时器 prohibitPHR-Timer。
11. 一种功率余量报告触发装置， 包括：
功率余量报告定时器；
触发模块， 设置为在所述功率余量报告定时器超时后， 根据用户设备功率 管理影响和路损影响触发用户设备上报功率余量报告。
12. 根据权利要求 11所述的装置， 其中， 还包括：
滤波模块， 设置为对用户设备功率管理影响进行滤波处理。
13. 根据权利要求 11或 12所述的装置， 其中， 所述触发模块包括： 判断子模块，设置为判断所述用户设备功率管理影响是否大于预定门限值; 触发子模块， 设置为在所述用户设备功率管理影响大于所述预定门限值的 情况下， 触发所述用户设备的功率余量报告。
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