WO2014067359A1 - 一种载波聚合系统中的功率上报方法及装置 - Google Patents

一种载波聚合系统中的功率上报方法及装置 Download PDF

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Publication number
WO2014067359A1
WO2014067359A1 PCT/CN2013/083723 CN2013083723W WO2014067359A1 WO 2014067359 A1 WO2014067359 A1 WO 2014067359A1 CN 2013083723 W CN2013083723 W CN 2013083723W WO 2014067359 A1 WO2014067359 A1 WO 2014067359A1
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Prior art keywords
information
srs
phr
serving cell
uplink data
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PCT/CN2013/083723
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English (en)
French (fr)
Inventor
万璐
刘扬
陈中明
黄亚达
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中兴通讯股份有限公司
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Publication of WO2014067359A1 publication Critical patent/WO2014067359A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/30TPC using constraints in the total amount of available transmission power
    • H04W52/36TPC 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
    • H04W52/365Power headroom reporting

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a power reporting method and apparatus in a carrier aggregation system. Background technique
  • wireless communication systems use electromagnetic waves to communicate with fixed or mobile wireless communication user equipment (wireless telephones or devices such as notebooks and computers with wireless communication cards can be referred to as user equipment).
  • user equipment wireless telephones or devices such as notebooks and computers with wireless communication cards
  • UE User Equipment
  • UE User Equipment
  • the control network element of the wireless communication system can control other devices according to the communication protocol or 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 (Node B or eNode B, including a macro base station, a micro base station, a home base station, etc.), a relay station (RS), and a user equipment.
  • Node B or eNode B including a macro base station, a micro base station, a home base station, etc.
  • RS relay station
  • the device may be selected as a temporary control station in the user equipment according to a predetermined rule.
  • Communication protocols or 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) 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).
  • the main processes of LTE uplink power control are:
  • the UE receives a TPC (transmission power control); (2) The UE performs measurement of the received power of the downlink radio channel pilot, calculates the path loss (Pathloss), and 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 the PHR ( The ower headroom report, and the transmission condition is met, then the UE also needs to send the PHR on the uplink shared channel.
  • TPC transmission power control
  • the physical downlink control channel of DCI Format 0/3/3A sends a TPC to the UE; and returns to 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 UE is related to resource allocation and coding modulation, so The power control mode is not sufficient to complete the power control task of the UE in the LTE.
  • the PHR sent by the UE to the eNodeB is used as the resource budget information of the PUSCH (Physical Uplink Shared Channel), and provides a basis for the eNodeB to perform uplink resource allocation. If the PHR reflects that the UE has a large power headroom, 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.
  • PUSCH Physical Uplink Shared Channel
  • the transmission frequency of the UE to the PHR of the eNodeB is lower than the transmission frequency of the eNodeB to the TPC of the UE.
  • the UE triggers the PHR report when the periodic PHR timer expires or the path loss changes greatly or the PHR is configured or reconfigured. After the UE obtains sufficient PUSCH resources for the PHR, the UE reports the PHR to the eNodeB.
  • PcMAX_H is the highest value of the maximum transmit power
  • the eNodeB controls the maximum transmit power of the UE to reduce the interference of the UE to the neighboring cell;
  • the UE can be complicated in design. Filter to reduce Out-of-band radiation, or 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. Since the method of reducing the transmit power (also called ower reduce, PR) is simple and effective, a large number of UEs will use this method to achieve the requirement of out-of-band radiation. However, in order to ensure the uplink transmission capability of the UE, the UE is not allowed to reduce the power unrestricted, so that the basic uplink service cannot be performed.
  • SEM Specific emission mask
  • ACLR Adjacent Channel Leakage Ratio
  • the maximum MPR (Maximum Power Reduction) allowed in the protocol, due to the out-of-band radiation.
  • the size is related to the modulation and demodulation configuration of the transmitted data, and the occupied bandwidth.
  • different MPRs are set according to different transmission bandwidths and modem modes, and each UE can set the actual implementation according to its own implementation.
  • the PR value can be as long as the PR ⁇ MPR is satisfied.
  • the UE is at the rated transmit power P p .
  • the actual power backoff value is subtracted, and after considering the maximum transmit power allowed by the above network, the minimum value of the two is the actual P CMAX .
  • P ue , tc is the uplink theoretical transmit power of the UE.
  • MCS Modulation and Coding Scheme
  • PUSCH (0 is the open loop power control adjustment value, "(0 is part of the way)
  • the damage compensation value t is a semi-static variable, is the path loss
  • ⁇ ( ) is the transmission format compensation value
  • / ( ) is the closed-loop power control adjustment value, that is, the transmission power of the PUSCH and the bandwidth of the occupied resources of the PUSCH, between the UE and the base station
  • the path loss is related to the configuration of the open loop power control and the closed loop power control. If the power backoff due to ower management (ie, the P-MPR limit) is not considered, the PHR calculation formula is PH ( ).
  • the triggers reported by the PHR mainly have the following three cases:
  • Carrier aggregation technology includes multiple methods, one of which is Carrier Aggregation (CA).
  • CA Carrier Aggregation
  • the so-called carrier aggregation means that multiple component carriers (CCs) can be aggregated to provide greater bandwidth.
  • the first carrier is generally a primary carrier, and can carry signaling and data.
  • the second carrier is mainly used for carrying data, and can also carry part of signaling.
  • the carrier can be divided into an uplink carrier (for user equipment to control station communication) and a downlink carrier (for control station to user equipment communication).
  • the wireless service area corresponding to the first carrier is the first service area
  • the wireless service area corresponding to the second carrier is the second service area.
  • the concept and name of the first carrier, the first service area and the second carrier, and the second service area will have corresponding definitions.
  • a user equipment configured with carrier aggregation has only one Radio Resource Control (RRC) connection in the network.
  • RRC Radio Resource Control
  • a radio resource management connection is established or re-established or a handover occurs
  • a service area that provides NAI (Network Access Identifier) mobile information and security input
  • PCell Primary Cell
  • SCells secondary service areas
  • the carrier corresponding to the primary service area is the first carrier, that is, the primary carrier, and includes a downlink primary component carrier (DL PCC) for controlling station-to-user equipment data transmission, and is used for user equipment to control.
  • DL PCC downlink primary component carrier
  • UPC Uplink Primary Component Carrier
  • the carrier corresponding to the secondary service area is the second carrier, that is, the secondary carrier, where the downlink secondary component carrier (DL SCC) for controlling the data transmission of the station to the user equipment is used, and is used for the user equipment to Uplink Secondary Component Carrier (UL SCC) for control station data communication.
  • DL SCC downlink secondary component carrier
  • UL SCC Uplink Secondary Component Carrier
  • the condition that the PHR is triggered also includes the activation of the SCell.
  • the base station In order to implement and maintain uplink synchronization between a user equipment and a base station, the base station According to the transmission delay (Timing Advance, abbreviated as TA) between the base station and each user equipment, each user equipment, the user equipment advances or delays the timing of each uplink transmission according to the time advancement sent by the base station, thereby making up for the user.
  • the transmission delay of the terminal to the base station is such that the uplink signals of different user equipments arrive at the base station within the receiving window of the base station.
  • the user equipment can work on multiple component carriers at the same time.
  • the component carriers can be continuous or discontinuous in the frequency band. They can be in the same frequency band or from different frequency bands. .
  • the timing advances on the component carriers may be different from each other; even if each component carrier belongs to the same frequency band and Continuous in the frequency band, if each component carrier originates from a different remote radio unit (RRU), or in order to increase cell coverage, each component carrier is processed by a different repeater, then each component The timing advances on the carrier may also differ from each other.
  • RRU remote radio unit
  • the UE works only on one carrier (one carrier for the time division duplex mode, and one pair of uplink and downlink carriers for the frequency division duplex mode, which is referred to as a carrier for convenience of description), and only needs to be in one carrier.
  • the uplink transmits an SRS (sounding reference signal), and in carrier aggregation, the UE can work on multiple component carriers simultaneously, and the SRS can be transmitted on these component carriers.
  • SRS sounding reference signal
  • the SRS and the uplink data (data transmitted on the PUSCH (Physical uplink share channel) on the different serving cells of the UE are not supported for parallel transmission, and the UE is not supported.
  • SRS and uplink control information (data transmitted on the PUCCH (Physical Uplink Control Channel)) are transmitted in parallel on the different serving cells.
  • the UE supports SRS and uplink data on different serving cells. Parallel transmission and SRS and uplink control information are transmitted in parallel on different serving cells.
  • the uplink transmission power of the UE may be limited due to the parallel transmission of the SRS and the uplink data or the uplink control information, so that the quality of the uplink data transmission and the signaling transmission of the UE cannot be guaranteed. So far, no effective solution has been proposed for this problem. Here, an appropriate power reporting method needs to be considered to solve the above problem. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a power reporting method in a carrier aggregation system and
  • the device can be used to ensure that the SRS and the uplink data are separately transmitted on different serving cells when the UE supports, or the UE supports the transmission of the SRS and the uplink control information on different serving cells at the same time, and ensures the transmission of data and signaling on the serving cell.
  • the present invention provides a power reporting method in a carrier aggregation system, including:
  • the user equipment supports the simultaneous transmission of the sounding reference signal (SRS) and the uplink data on different serving cells, or the UE supports the simultaneous transmission of the SRS and the uplink control information on different serving cells.
  • SRS sounding reference signal
  • PH power headroom
  • the PH information maximum transmit power of the UE in the serving cell that sends the SRS - the estimated uplink data transmission channel transmit power of the UE on the serving cell;
  • the PH information the maximum transmission power of the UE in the serving cell that transmits the SRS - the uplink data transmission channel transmission power estimated by the UE on the serving cell - the transmission power of the SRS;
  • the UE reports the power headroom report (PHR) information, and carries the PH information in the PHR information.
  • PHR power headroom report
  • the UE reports the PHR information, including:
  • the UE reports the PHR information of the UE to the control station when transmitting the SRS and the uplink data on the different serving cells at the same time; or the UE reports to the control station before sending the SRS and the uplink data on different serving cells at the same time. PHR information of the UE.
  • the UE reports the PHR information, including:
  • the UE When the UE simultaneously transmits the SRS and the uplink control information on different serving cells, the UE reports the PHR information of the UE to the control station; or, before the UE simultaneously sends the SRS and the uplink control information on different serving cells, the UE controls the PRS.
  • the station reports the PHR information of the UE.
  • the different serving cell comprises a primary serving cell and an activated secondary serving cell, or any two activated serving cells.
  • the different serving cells belong to the same carrier group or belong to different carrier groups.
  • the method further includes: carrying, in the PHR information, an indication identifier of the serving cell corresponding to the PH information, where only the SRS is sent in the cell that sends the SRS, where the serving cell
  • the indication identifier is used to identify that no uplink data or uplink control information is sent on the current serving cell.
  • the present invention further provides a power reporting apparatus in a carrier aggregation system, located in a user equipment (UE), including a power headroom (PH) information calculation module and a power headroom report (PHR) information reporting module. , among them:
  • the PH information calculation module is configured to: separately transmit a sounding reference signal (SRS) and uplink data on different serving cells while the current UE supports, or the current UE supports simultaneously transmitting SRS and uplink control information on different serving cells.
  • SRS sounding reference signal
  • the PH information maximum transmit power of the UE in the serving cell that sends the SRS - the estimated uplink data transmission channel transmit power of the UE on the serving cell;
  • the PH information the maximum transmission power of the UE in the serving cell that transmits the SRS - the uplink data transmission channel transmission power estimated by the UE on the serving cell - the transmission power of the SRS;
  • the PHR information reporting module is configured to: report the PHR information, and carry the PH information calculated by the PH information calculation module in the PHR information.
  • the PHR information reporting module is configured to: report PHR information when the current UE supports simultaneous transmission of SRS and uplink data on different service cells, including:
  • the PHR information reporting module reports the PHR information of the UE to the control station when the current UE simultaneously transmits the SRS and the uplink data on different serving cells; or, the current UE simultaneously sends the SRS and the uplink data on different serving cells simultaneously. Previously, the PHR information of the UE was reported to the control station.
  • the PHR information reporting module is configured to: when the current UE supports the SRS and the uplink control information on different service cells, report the PHR information, including:
  • the PHR information reporting module reports the PHR information of the UE to the control station when the current UE simultaneously sends the SRS and the uplink control information on different serving cells; or, in the current UE The PHR information of the UE is reported to the control station before the SRS and the uplink control information are respectively sent on different serving cells.
  • the different serving cell comprises a primary serving cell and an activated secondary serving cell, or any two activated serving cells.
  • the different serving cells belong to the same carrier group or belong to different carrier groups.
  • the PHR information reporting module is further configured to: carry the indication identifier of the serving cell corresponding to the PH information in the PHR information, and when only the SRS is sent in the cell that sends the SRS, The indication identifier of the serving cell is used to identify that no uplink data or uplink control information is sent on the current serving cell.
  • the present application actively sends the instantaneous power information of the UE to the base station by using the UE on the serving cell, and solves the problem that when the UE can simultaneously send the SRS and the uplink data on different cells, or simultaneously send the SRS and the uplink control information on different cells,
  • the problem of ensuring the transmission of data and signaling on the serving cell enables the base station side to adjust the power of the user equipment to transmit data and/or signaling on the serving cell, and correctly demodulate the relevant data and/or signaling, thereby achieving an improvement The effect of transmission efficiency.
  • Embodiment 1 is a flowchart of Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural diagram of a reporting apparatus according to an embodiment of the present invention.
  • Fig. 5 is a flow chart showing an application example 3 of the present invention. Preferred embodiment of the invention
  • Example 1 This embodiment describes a method for reporting power in a carrier aggregation system. As shown in FIG. 1 , the method includes: Step 10: The UE supports sending SRS and uplink data on different serving cells at the same time, or the UE supports sending separately on different serving cells. When the SRS and the uplink control information are used, the UE calculates the PH information of the serving cell that sends the SRS by using one of the following formulas:
  • PH information maximum transmission power of the serving cell in which the UE transmits the SRS - the uplink data transmission channel transmission power estimated by the UE on the serving cell; Equation (1)
  • PH information maximum transmission power of the serving cell in which the UE transmits the SRS - the uplink data transmission channel transmission power estimated by the UE on the serving cell - the transmission power of the SRS; (2) the UE supports simultaneous transmission on different serving cells simultaneously
  • the SRS and the uplink data are: The UE supports sending the SRS in one serving cell, and transmitting the uplink data in another serving cell (transmitting the uplink data on the PUSCH); the UE supports simultaneously transmitting the SRS and the uplink control information on different serving cells. The UE supports the SRS in one serving cell and the uplink control information in the other serving cell (that is, the uplink control information is sent on the PUCCH).
  • the UE calculates the PH of the formula (1), and does not consider the power of the SRS.
  • the UE does not consider the power of the SRS when reporting the PH of the serving cell that transmits the SRS, which can reduce the complexity of the UE, and the power consumed by the SRS is less. Therefore, the power of the SRS may not be calculated for the sake of simplicity in calculating the power headroom.
  • the UE calculates the PH calculated by the equation (2), and considers the power of the SRS.
  • the UE reports the PH value of the serving cell, considering the power of the SRS, the calculation of the PH value of the serving cell can be made more accurate.
  • the base station After the UE reports the PHR to the base station, the base station According to the PH information of the serving cell in the PHR, the UE can perform power adjustment, and the UE can implement more accurate uplink power control.
  • Step 11 The UE reports PHR information, where the PHR information carries the calculated PH information.
  • the triggering condition for the UE to report the PHR information includes: when the UE simultaneously sends the SRS and the uplink data on different serving cells, or the UE simultaneously separately on different serving cells Before sending SRS and upstream data. That is, when the UE simultaneously transmits the SRS and the uplink data on different serving cells, the UE reports the PHR information of the UE to the control station; or, before the UE simultaneously sends the SRS and the uplink data on different serving cells, the UE sends the SRS and the uplink data to the control station. PHR information of the UE.
  • the triggering condition for the UE to report the PHR information includes: when the UE simultaneously sends the SRS and the uplink control information on different serving cells, or the UE is in different serving cells at the same time.
  • the UE Before sending SRS and uplink control information respectively. That is, when the UE separately transmits the SRS and the uplink control information on different serving cells, the UE reports the PHR information of the UE to the control station; or, before the UE simultaneously sends the SRS and the uplink control information on different serving cells, the UE reports the message to the control station. PHR information of the UE.
  • the UE After reporting the PHR, the UE adjusts or does not adjust the uplink data transmission power and/or the uplink signaling transmission power on the serving cell according to the power control information fed back by the control station.
  • the control stations described herein include: a macro base station, a micro base station, a pico base station, or a relay station.
  • the different serving cells mentioned above include a primary serving cell and an activated secondary serving cell, or any two activated serving cells.
  • Different serving cells may belong to the same carrier group or may belong to different carrier groups.
  • the indication information of the serving cell may be carried in the PHR information, where the indication identifier is corresponding to the PH information, and the PH information of each serving cell corresponds to an indication identifier, and is sent in different cells simultaneously with the UE support.
  • the uplink data transmission channel transmission power for calculating the PH value will be the actual transmission power, not the estimated value.
  • the power device of the method of the foregoing embodiment 1 is located at the UE. As shown in FIG. 2, the device includes a PH information calculation module 21 and a PHR information reporting module 22, where:
  • PH information maximum transmission power of the UE in the serving cell in which the SRS is transmitted - the uplink data transmission channel transmission power estimated by the UE on the service cell - the transmission power of the SRS;
  • the PHR information reporting module 22 is configured to report PHR information, and carry the PH information calculated by the PH information calculation module 21 in the PHR information.
  • the PHR information reporting module 22 may report the PHR information of the UE to the control station when the current UE simultaneously sends the SRS and the uplink data on different serving cells; or, the current UE simultaneously sends the SRS and the uplink on different serving cells. Before the data, the PHR information of the UE is reported to the control station; or, when the current UE simultaneously transmits the SRS and the uplink control information on different serving cells, the PHR information of the UE is reported to the control station; or, the current UE is simultaneously Before transmitting the SRS and the uplink control information on the different serving cells, the PHR information of the UE is reported to the control station.
  • the PHR information reporting module 22 is further configured to: in the PHR information, carry the indication identifier of the serving cell that sends the SRS corresponding to the PH information, where the SRS is sent in the cell that sends the SRS, the indication of the serving cell
  • the identifier is used to identify that no uplink data or uplink control information is sent on the current serving cell.
  • the power control method after the above power reporting method is described by taking the control station as a base station as an example.
  • This example describes a scenario in which a UE sends an SRS on a SCelll (secondary serving cell 1) and a PUSCH on a SCell2 (secondary serving cell 2). As shown in FIG. 3, the following steps are included:
  • Step 101 When the UE determines that the PHR reporting trigger condition is met, the UE simultaneously carries the PHR information in the uplink data of the SCell2.
  • the trigger condition for the PHR includes any of the following: 1) 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 can be sent when the uplink resource is allocated. That is, the PHR trigger is not necessarily in the same time unit as the PHR. Because the priority of the PHR is higher than the normal data, the uplink resource can be preferentially occupied.
  • the calculation can also be calculated using the above formula (2).
  • Step 102 The base station receives the uplink data information sent by the UE, and obtains power information carried by the PHR.
  • Step 103 The UE receives the power control information fed back by the base station, and adjusts or does not adjust the uplink data transmission power and/or the uplink signaling transmission power on the serving cell.
  • the power control information indicates that the user equipment adjusts the uplink data transmission power and/or the uplink signaling transmission power on the serving cell, the user equipment adjusts the uplink data transmission power and/or the uplink signaling transmission power on the serving cell; if the power control information The user equipment does not need to adjust the uplink data transmission power and/or the uplink signaling transmission power on the serving cell or the related power adjustment information, and the user equipment does not need to adjust the uplink data transmission power and/or uplink signaling existing on the serving cell. Transmission power.
  • the UE has one primary serving cell PCelll, and two secondary serving cells SCelll and SCell2, as shown in FIG. 4, including the following steps: Step 201: When the UE determines that the PHR reporting trigger condition is met, the UE carries the PHR information in the uplink data of the PCel11.
  • the conditions for triggering PHR are:
  • SCelll and SCell2 send SRS and uplink data (transmit data on the PUSCH channel) to the base station before the same subframe, or SCelll and SCell2 send SRS and uplink control information (send information on PUCCH) to the base station respectively in the same subframe. .
  • the UE determines that the SRS and the uplink control information (or the uplink data) are respectively sent in the two SCells in the subsequent one or several frames, so the UE carries the PHR information in the uplink data on the PCell. For example, the UE will send SRS and uplink data to the base station side in SCelll and SCelll respectively in subframe N, and in subframe N-2, the UE carries PHR information in the uplink data sent by PCelll to the base station.
  • the PH value corresponding to the SCelll that transmits the SRS separately transmitted may be calculated by using the above formula (1), or may be calculated by using the above formula (2). If ⁇ is calculated using equation (2), the SRS transmission power is an estimated value.
  • Step 202 and step 203 are the same as the example 1.
  • This example describes a scenario in which a UE sends an SRS on SCelll and sends uplink data on SCell2. As shown in FIG. 5, the following steps are included:
  • Step 301 When the UE determines that the PHR reporting trigger condition is met, the UE simultaneously carries the PHR information in the uplink data.
  • the trigger condition for PHR is:
  • the calculation can also be calculated using the above formula (2).
  • Step 302 and step 303 are the same as the example 1.
  • the present application actively sends the instantaneous power information of the UE to the base station by using the UE on the serving cell, and solves the problem that when the UE can simultaneously send the SRS and the uplink data on different cells, or simultaneously send the SRS and the uplink control information on different cells,
  • the problem of ensuring the transmission of data and signaling on the serving cell enables the base station side to adjust the power of the user equipment to transmit data and/or signaling on the serving cell, and correctly demodulate the relevant data and/or signaling, thereby achieving an improvement The effect of transmission efficiency.

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Abstract

一种载波聚合系统中的功率上报方法,包括:用户设备(UE)支持同时在不同服务小区上分别发送侦听参考信号(SRS)和上行数据,或UE支持同时在不同服务小区上分别发送SRS和上行控制信息时,所述UE采用下式之一计算发送SRS的服务小区的功率余量(PH)信息:所述PH信息=UE在所述发送SRS的服务小区的最大发送功率-UE在所述服务小区上估计的上行数据传输信道发送功率;所述PH信息=UE在所述发送SRS的服务小区的最大发送功率-UE在所述服务小区上估计的上行数据传输信道发送功率-SRS的发送功率;UE上报功率余量报告(PHR)信息,在所述PHR信息中携带所述PH信息。

Description

一种载波聚合系统中的功率上报方法及装置
技术领域
本发明涉及移动通讯技术领域, 具体涉及一种载波聚合系统中的功率上 报方法及装置。 背景技术
目前, 无线通信系统使用电磁波与固定的或者移动的无线通信用户设备 (无线电话或附有无线通信卡的笔记本和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 )位于系统的无线覆盖范围之内, 并通过无线通信信道中的载波与系 统进行通信。
无线通信系统的控制网元可以根据系统约定的通信协议或技术控制其他 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( Node B , 或 者 eNode B, 包括宏基站, 微基站, 家庭基站等) 、 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。 通信协议或技术包括但不限 于 GSM ( Global System for Mobile Communications, 全球移动通信系统 ) 、 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) 。
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 进行下行无线信道导频接收功率的测量, 计算路径损耗 ( Pathloss ) , 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 ( ower 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 )。
系统中 UE釆用动态的资源分配方式, 并且釆用自适应的信道编码调制 方式(adaptive modulation and coding, AMC ) , 在 LTE中, UE的上行发射 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中 UE的功率控制任务,通过 UE向 eNodeB发送的 PHR作为 PUSCH (物理上行共享信道) 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系统中 UE向 eNodeB的 PHR的发送频率低于 eNodeB向 UE的 TPC 的发送频率。 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配置或重配置时触发 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 ) = Pcu^ -Pue,tx , PH为功率余量值( Power headroom ) , ^CMAX为 UE西己置最大发射功率 ( configured maximum output power ) , PCMAX_L
< PCMAX < PCMAX_H' PcMAX_L 为最大发射功率最氐值, PcMAX_H 为最大发射功 率最高值, PCMAX的取值范围主要有两种受限因素:
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 ( Spectrum emission mask, 频语发射展蔽) 和 ACLR ( Adjacent Channel Leakage Ratio, 邻带泄露比)等要求, UE可以设计复杂的滤波器, 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, ower reduce , PR ) 的方法简单有效, 大量 UE在实现时会釆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,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。
所以考虑到功率回退后, UE在额定的发射功率 Ppwerciass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
Pue,tc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
Figure imgf000005_0001
Pue , , ^在 LTE中为 PUSCH的发射功率, 定 义为 Pue ,pusch = 101og1()(MpUSCH(/》+尸。 PUSCH (t) +a(t PL+^(i) +f(i) , 其中的 PUSCH(/)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, P。 PUSCH(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、 Δ ( )为传输格式补偿值, /( )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。 如果不考虑由于功率管理 ( ower management ) 带来的功率回退(即 P-MPR的限制) , PHR计算公 式为 PH ( )
Figure imgf000005_0002
} ,其中 PHR以 dB为单位, 公式中功率以 dBm为单位。
在 LTE中, 如果不考虑由于功率管理( power management )带来的功率 回退(即 P-MPR的限制 ) , 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 eNB。
随着通信系统和技术的发展, 为提高系统性能, 载波聚合通信系统开始 出现。 载波聚合技术包括多种方式, 其中之一就是载波聚合 ( Carrier Aggregation, CA ) 。 例如, 在 LTE-A系统中, 所谓载波聚合, 就是多个分 量载波(Component Carrier, CC ) 可以聚合在一起用来提供更大的带宽。
在载波聚合系统中, 对于某一个用户来说, 可以有一个第一载波和一个 或多个第二载波。 第一载波一般为主要的载波, 可以承载信令和数据, 第二 载波主要用于承载数据, 也可以承载部分信令。 载波可以分为上行载波(用 于用户设备到控制站通信)和下行载波(用于控制站到用户设备通信) 。 对 应第一载波的无线服务区为第一服务区, 对应第二载波的无线服务区为第二 服务区。 在不同的系统中, 第一载波, 第一服务区和第二载波, 第二服务区 的概念和名称都会有相应的细节定义。
例如在 LTE-A系统中,配置了载波聚合的用户设备在网内只有一个无线 资源管理(Radio Resource Control, RRC )连接。 无线资源管理连接建立或 重新建立或切换发生时, 提供 NAI ( Network Access Identifier, 网络访问标 识符)移动信息和安全输入的服务区( Serving Cell )被称为主服务区( Primary Cell, PCell ) , 即第一服务区, 而根据用户设备能力配置可以配置一个或者 多个辅服务区 ( Secondary Cell, SCell ) , 即第二服务区。 进一步的, 主服务 区对应的载波就是第一载波, 即主载波, 其中包括用于控制站到用户设备数 据传输的下行主分量载波( Downlink Primary Component Carrier, DL PCC ) 和用于用户设备到控制站数通信的上行主分量载波 (Uplink Primary Component Carrier, UL PCC )。类似的,辅服务区对应的载波就是第二载波, 即辅载波, 其中, 包括用于控制站到用户设备数据传输的下行辅分量载波 ( Downlink Secondary Component Carrier, DL SCC )和用于用户设备到控制 站数据通信的上行辅分量载波 ( Uplink Secondary Component Carrier , UL SCC ) 。
载波聚合系统中, PHR被触发的条件还包括了 SCell的激活。
在 LTE系统中, 为了实现并保持用户设备与基站之间的上行同步,基站 根据基站与各用户设备之间的传输时延发送时间提前量(Timing Advance, 简称为 TA )给各用户设备, 用户设备根据基站发送的时间提前量提前或推 迟各自上行传输的时机, 从而弥补用户终端至基站的传输时延, 使得不同用 户设备的上行信号都在基站的接收窗口之内到达基站。
引入载波聚合技术后, 用户设备可以同时工作在多个分量载波上, 这些 分量载波在频带上可以是连续的,也可以是不连续的;可以是同一频带内的, 还可以是来自于不同频带。 对于分量载波不连续的情况, 或者分量载波来自 于不同频带的情况, 由于各分量载波具有不同的传输特性, 各分量载波上的 时间提前量可能互不相同; 即使各分量载波属于同一频带且在频带上连续, 如果各分量载波源自不同的射频拉远单元( remote radio units,简称为 RRU ), 或者为了增加小区覆盖 ,各分量载波分别经由不同的中继器( repeater )处理, 则各分量载波上的时间提前量也可能互不相同。 LTE 系统中, UE只工作在 一个载波上(对于时分双工模式是一个载波, 对于频分双工模式包括上行、 下行一对载波, 为描述方便, 这里简称一个载波) , 仅需要在一个载波的上 行发送 SRS (侦听参考信号, sounding reference signal ) , 而在载波聚合中, UE可以同时工作在多个分量载波上,并且可以在这些分量载波上发送 SRS。
在 Rel-10载波聚合系统中,不支持 UE的不同服务小区上的 SRS与上行 数据 (在 PUSCH (物理层上行共享信道, Physical uplink share channel )上传 输的数据 )并行传输, 也不支持 UE的不同服务小区上的 SRS与上行控制信 息 (在 PUCCH (物理层上行控制信道, Physical uplink control channel )上传 输的数据)并行传输, 在 Rel-11中, UE支持了不同服务小区上 SRS和上行 数据并行传输以及不同服务小区上 SRS和上行控制信息并行传输,此时由于 SRS与上行数据或上行控制信息并发可能导致的 UE上行发送功率受限从而 无法保证 UE上行数据传输和信令传输的质量。 目前为止, 针对这一问题尚 未提出有效的解决办法, 这里就需要考虑一种适当的功率上报方法以解决上 述问题。 发明内容
本发明要解决的技术问题是提供一种载波聚合系统中的功率上报方法及 装置,能够解决当 UE支持同时在不同服务小区上分别发送 SRS和上行数据, 或 UE支持同时在不同服务小区上分别发送 SRS和上行控制信息时, 保证服 务小区上数据和信令的传输。
为解决上述技术问题, 本发明提供了一种载波聚合系统中的功率上报方 法, 包括:
用户设备( UE )支持同时在不同服务小区上分别发送侦听参考信号( SRS ) 和上行数据, 或 UE支持同时在不同服务小区上分别发送 SRS和上行控制信 息时, 所述 UE釆用下式之一计算发送 SRS的服务小区的功率余量(PH )信 息:
所述 PH信息 =UE在所述发送 SRS的服务小区的最大发送功率 - UE在所 述服务小区上估计的上行数据传输信道发送功率;
所述 PH信息 =UE在所述发送 SRS的服务小区的最大发送功率 -UE在所 述服务小区上估计的上行数据传输信道发送功率- SRS的发送功率;
UE上报功率余量报告 ( PHR )信息, 在所述 PHR信息中携带所述 PH 信息。
优选地,当 UE支持同时在不同服务小区上分别发送 SRS和上行数据时, 所述 UE上报 PHR信息, 包括:
所述 UE同时在不同服务小区上分别发送 SRS和上行数据时, 向控制站 上报本 UE的 PHR信息;或者,所述 UE同时在不同服务小区上分别发送 SRS 和上行数据之前, 向控制站上报本 UE的 PHR信息。
优选地, 当 UE支持同时在不同服务小区上分别发送 SRS和上行控制信 息时, 所述 UE上报 PHR信息, 包括:
所述 UE同时在不同服务小区上分别发送 SRS和上行控制信息时, 向控 制站上报本 UE的 PHR信息; 或者, 所述 UE同时在不同服务小区上分别发 送 SRS和上行控制信息之前, 向控制站上报本 UE的 PHR信息。
优选地, 所述不同服务小区, 包括主服务小区和已激活的辅服务小区, 或任意两个已激活的服务小区。
优选地, 所述不同的服务小区属于同一载波组或属于不同载波组。 优选地, 所述方法还包括, 在所述 PHR信息中携带与所述 PH信息对应 的所述服务小区的指示标识, 当所述发送 SRS的小区中仅有 SRS发送时, 所述服务小区的指示标识用于标识当前服务小区上无上行数据或上行控制信 息发送。
为解决上述技术问题, 本发明还提供了一种载波聚合系统中的功率上报 装置, 位于用户设备(UE ) , 包括功率余量(PH )信息计算模块和功率余 量报告 ( PHR )信息上报模块, 其中:
所述 PH信息计算模块, 设置为: 在当前 UE支持同时在不同服务小区 上分别发送侦听参考信号 (SRS )和上行数据, 或当前 UE支持同时在不同 服务小区上分别发送 SRS 和上行控制信息时, 釆用下式之一计算发送 SRS 的服务小区的 PH信息:
所述 PH信息 =UE在所述发送 SRS的服务小区的最大发送功率 - UE在所 述服务小区上估计的上行数据传输信道发送功率;
所述 PH信息 =UE在所述发送 SRS的服务小区的最大发送功率 -UE在所 述服务小区上估计的上行数据传输信道发送功率- SRS的发送功率;
所述 PHR信息上报模块, 设置为: 上报 PHR信息, 在所述 PHR信息中 携带所述 PH信息计算模块计算的 PH信息。
优选地, 所述 PHR信息上报模块设置为: 在当前 UE支持同时在不同服 务小区上分别发送 SRS和上行数据时, 上报 PHR信息, 包括:
所述 PHR信息上报模块在当前 UE同时在不同服务小区上分别发送 SRS 和上行数据时, 向控制站上报本 UE的 PHR信息; 或者, 在当前 UE同时在 不同服务小区上分别发送 SRS和上行数据之前,向控制站上报本 UE的 PHR 信息。
优选地, 所述 PHR信息上报模块设置为: 在当前 UE支持同时在不同服 务小区上分别发送 SRS和上行控制信息时, 上报 PHR信息, 包括:
所述 PHR信息上报模块在当前 UE同时在不同服务小区上分别发送 SRS 和上行控制信息时, 向控制站上报本 UE的 PHR信息; 或者, 在当前 UE同 时在不同服务小区上分别发送 SRS 和上行控制信息之前, 向控制站上报本 UE的 PHR信息。
优选地, 所述不同服务小区, 包括主服务小区和已激活的辅服务小区, 或任意两个已激活的服务小区。
优选地, 所述不同的服务小区属于同一载波组或属于不同载波组。
优选地, 所述 PHR信息上报模块还设置为: 在所述 PHR信息中携带与 所述 PH信息对应的所述服务小区的指示标识, 当所述发送 SRS的小区中仅 有 SRS发送时,所述服务小区的指示标识用于标识当前服务小区上无上行数 据或上行控制信息发送。
本申请通过 UE在服务小区上向基站主动发送 UE的即时功率信息, 解 决了当 UE可以同时在不同小区上分别发送 SRS和上行数据, 或同时在不同 小区上分别发送 SRS和上行控制信息时,保证服务小区上数据和信令的传输 的问题,使得基站侧能调整用户设备在服务小区上传输数据和 /或信令的功率, 并正确解调相关数据和 /或信令, 进而达到了提高传输效率的效果。 附图概述
图 1为本发明实施例 1的流程图;
图 2为本发明实施例上报装置结构示意图;
图 3为本发明应用示例 1的流程图;
图 4为本发明应用示例 2的流程图;
图 5为本发明应用示例 3的流程图。 本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 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任意组合。
实施例 1 本实施例介绍载波聚合系统中的功率上报方法, 如图 1所示, 包括: 步骤 10, UE支持同时在不同服务小区上分别发送 SRS和上行数据, 或 UE支持同时在不同服务小区上分别发送 SRS和上行控制信息时, 该 UE釆 用下式之一计算发送 SRS的服务小区的 PH信息:
PH信息 =UE在发送 SRS的服务小区的最大发送功率 - UE在该服务小区 上估计的上行数据传输信道发送功率; 式( 1 )
PH信息 =UE在发送 SRS的服务小区的最大发送功率 -UE在该服务小区 上估计的上行数据传输信道发送功率- SRS的发送功率; 式( 2 ) 上述 UE支持同时在不同服务小区上分别发送 SRS和上行数据, 是指: UE支持在一个服务小区发送 SRS,同时在另一个服务小区发送上行数据(在 PUSCH上发送上行数据 ); UE支持同时在不同服务小区上分别发送 SRS和 上行控制信息, 是指: UE支持在一个服务小区发送 SRS, 同时在另一个服 务小区发送上行控制信息 (即在 PUCCH上发送上行控制信息) 。
UE釆用式( 1 )计算的 PH, 未考虑 SRS的功率, UE在上报发送 SRS 的服务小区的 PH时不考虑 SRS的功率可以减少 UE实现的复杂度,由于 SRS 发送时占用的功率较少, 因此在计算功率余量时出于实现简单的考虑可以不 计算 SRS的功率。
UE釆用式(2 )计算的 PH, 考虑了 SRS的功率, UE在上报服务小区的 PH值时考虑 SRS的功率可以使该服务小区 PH值的计算更加精确, UE向基 站上报 PHR后,基站根据 PHR中该服务小区的 PH信息对 UE进行功率调整, UE可以实现更精确地上行功率控制。
步骤 11 , UE上报 PHR信息, 在该 PHR信息中携带计算的 PH信息。 当 UE支持同时在不同服务小区上分别发送 SRS和上行数据时, UE上 报 PHR信息的触发条件包括: UE同时在不同服务小区上分别发送 SRS和上 行数据时, 或 UE同时在不同服务小区上分别发送 SRS和上行数据之前。 即 UE同时在不同服务小区上分别发送 SRS和上行数据时,向控制站上报本 UE 的 PHR信息; 或者, UE同时在不同服务小区上分别发送 SRS和上行数据之 前, 向控制站上 ^艮本 UE的 PHR信息。 当 UE支持同时在不同服务小区上分别发送 SRS和上行控制信息时, UE 上报 PHR信息的触发条件包括: UE同时在不同服务小区上分别发送 SRS和 上行控制信息时, 或 UE同时在不同服务小区上分别发送 SRS和上行控制信 息之前。 即 UE同时在不同服务小区上分别发送 SRS和上行控制信息时, 向 控制站上报本 UE的 PHR信息; 或者, UE同时在不同服务小区上分别发送 SRS和上行控制信息之前, 向控制站上报本 UE的 PHR信息。
UE在上报 PHR之后, 根据控制站反馈的功率控制信息调整或者不调整 服务小区上的上行数据传输功率和 /或上行信令传输功率。本文所述控制站包 括: 宏基站、 微基站, 微微基站或中继站。
上述不同服务小区, 包括主服务小区和已激活的辅服务小区, 或任意两 个已激活的服务小区。 不同服务小区可属于同一载波组或也可以属于不同载 波组。
在一个优选实施例中,还可以在该 PHR信息中携带该服务小区的指示标 识, 该指示标识与 PH信息对应, 每个服务小区的 PH信息对应一个指示标 识, 在 UE支持同时在不同小区发送 SRS和上行数据(或上行控制信息) 的 场景下, 当发送 SRS的小区中仅有 SRS发送时, 该服务小区的指示标识用 于标识当前服务小区上无上行数据或上行控制信息发送。 例如: 在某服务小 区如果仅有 SRS发送, 则将指示标识设置为有效(例如 V=l ) , 如果该服务 小区既有 SRS发送又有上行数据或上行控制信息发送,则将指示标识设置为 无效(例如 V=0 )。 当该服务小区既有 SRS发送又有上行数据或上行控制信 息发送时, 计算该 PH值的上行数据传输信道发送功率将为实际发送功率, 而非估计值。
实施例 2
实现上述实施例 1方法的功率上 "^装置位于 UE, 如图 2所示, 包括 PH 信息计算模块 21和 PHR信息上报模块 22, 其中:
该 PH信息计算模块 21 , 用于在当前 UE支持同时在不同服务小区上分 别发送 SRS 和上行数据, 或当前 UE 支持同时在不同服务小区上分别发送 SRS和上行控制信息时,釆用下式之一计算发送 SRS的服务小区的 PH信息: PH信息 =UE在该发送 SRS的服务小区的最大发送功率- UE在该服务小 区上估计的上行数据传输信道发送功率;
PH信息 =UE在该发送 SRS的服务小区的最大发送功率 -UE在该服务小 区上估计的上行数据传输信道发送功率- SRS的发送功率;
该 PHR信息上报模块 22, 用于上报 PHR信息, 在所述 PHR信息中携 带该 PH信息计算模块 21计算的 PH信息。
该 PHR信息上报模块 22可以在当前 UE同时在不同服务小区上分别发 送 SRS和上行数据时, 向控制站上报本 UE的 PHR信息; 或者, 在当前 UE 同时在不同服务小区上分别发送 SRS和上行数据之前, 向控制站上报本 UE 的 PHR信息; 或者, 在当前 UE同时在不同服务小区上分别发送 SRS和上 行控制信息时, 向控制站上报本 UE的 PHR信息; 或者, 在当前 UE同时在 不同服务小区上分别发送 SRS和上行控制信息之前, 向控制站上报本 UE的 PHR信息。
该 PHR信息上报模块 22还用于在所述 PHR信息中携带与 PH信息对应 的该发送 SRS的服务小区的指示标识, 当所述发送 SRS的小区中仅有 SRS 发送时, 该服务小区的指示标识用于标识当前服务小区上无上行数据或上行 控制信息发送。
下文通过应用示例对上述实施例方法进行举例说明 ,在不冲突的情况下, 本应用示例中的特征可以相互组合。
在以下示例中以控制站为基站为例说明釆用上述功率上报方法后的功率 控制方法。
应用示例 1
本示例描述 UE在 SCelll (辅服务小区 1 )上发送 SRS, 在 SCell2 (辅 服务小区 2 )上发送 PUSCH的场景, 如图 3所示, 包括以下步骤:
步骤 101 : 当 UE判断符合 PHR上报触发条件时, UE同时在 SCell2的 上行数据中携带 PHR信息;
在本示例中, PHR的触发条件包括以下任意之一: 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;
4 ) 某一个 SCell被激活。
UE触发了 PHR后, 可以等到有上行资源分配时再发送 PHR, 即 PHR 的触发不一定和 PHR的发送在同一个时间单位, 因为 PHR的优先级比普通 数据高, 可以优先占用上行资源。
在本示例中 UE的 PHR信息中包括 SCelll对应的 PH信息以及 SCell2 对应的 PH信息以及小区的指示标识。 由于 SCelll上无 PUSCH发送, 因此 SCelll的 PH值对应的指示标志位 V=l ;由于 SCell2上发送 PUSCH,则 SCell2 的 PH值对应的指示标志位 V=0。 计算, 也可以釆用上述公式(2 )计算。
步骤 102: 基站接收到 UE发送的上行数据信息, 获得 PHR携带的功率 信息;
步骤 103: UE接收基站反馈的功率控制信息, 调整或者不调整服务小区 上的上行数据传输功率和 /或上行信令传输功率。
如果功率控制信息指示用户设备调整服务小区上的上行数据传输功率和 /或上行信令传输功率, 则用户设备调整服务小区上的上行数据传输功率和 / 或上行信令传输功率; 如果功率控制信息指示用户设备无需调整服务小区上 的上行数据传输功率和 /或上行信令传输功率或者不包含相关功率调整信息, 则用户设备无需调整服务小区上已有的上行数据传输功率和 /或上行信令传 输功率。
应用示例 2
本示例中, UE有一个主服务小区 PCelll , 和两个辅服务小区 SCelll和 SCell2, 如图 4所示, 包括以下步骤: 步骤 201 : 当 UE判断符合 PHR上报触发条件时, UE在 PCelll的上行 数据中携带 PHR信息;
本示例中, 触发 PHR的条件为:
SCelll和 SCell2在同一子帧向基站分别发送 SRS和上行数据(在 PUSCH 信道上发送数据 )之前, 或者 SCelll和 SCell2 在同一子帧向基站分别发送 SRS和上行控制信息 (在 PUCCH上发送信息)之前。
UE判断在随后的一帧或者若干帧中将同时在两个 SCell分别发送 SRS 和上行控制信息(或上行数据), 因此 UE在 PCell上的上行数据中携带 PHR 信息。 例如, UE将在子帧 N在 SCelll和 SCelll分别向基站侧发送 SRS和 上行数据,而在子帧 N-2, UE在 PCelll向基站发送的上行数据中就携带 PHR 信息。
UE的 PHR信息中携带了 SCelll和 SCell2的 PH信息; 由于当前 SCelll 上无上行数据或上行控制信息发送,则 SCelll的 PH值对应的指示标志位 V=l ; 由于当前 SCell2上无上行数据或上行控制信息发送,则 SCell2的 PH值对应 的指示标志位 V=l。
本示例中, UE上报的 PHR中, 将发送单独发送 SRS的 SCelll对应的 PH值可釆用上述公式(1 )计算, 也可以釆用上述公式(2 )计算。 如果釆 用公式(2 )计算, 其中的 SRS发送功率为估计值。
步骤 202、 步骤 203与示例 1相同。
应用示例 3
本示例描述 UE在 SCelll上发送 SRS,在 SCell2上发送上行数据的场景, 如图 5所示, 包括以下步骤:
步骤 301 : 当 UE判断符合 PHR上报触发条件时, UE同时在上行数据 中携带 PHR信息;
在本示例中, PHR的触发条件为:
SCelll和 SCell2同时向基站分别发送 SRS和上行数据,或同时向基站分 别发送 SRS和上行控制信息时; UE的 PHR信息中包括了 SCelll和 SCell2对应的 PH信息以及对应小区 的指示标识, 由于 SCelll上无上行数据发送, 则 SCelll的 PH值对应的指示 标志位 V=l ; 由于 SCell2上发送上行数据, 则 SCell2的 PH值对应的标志位 v=o。 计算, 也可以釆用上述公式(2 )计算。
步骤 302、 步骤 303与示例 1相同。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
当然, 本发明还可有其他多种实施例, 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
本申请通过 UE在服务小区上向基站主动发送 UE的即时功率信息, 解 决了当 UE可以同时在不同小区上分别发送 SRS和上行数据, 或同时在不同 小区上分别发送 SRS和上行控制信息时,保证服务小区上数据和信令的传输 的问题,使得基站侧能调整用户设备在服务小区上传输数据和 /或信令的功率, 并正确解调相关数据和 /或信令, 进而达到了提高传输效率的效果。

Claims

权 利 要 求 书
1、 一种载波聚合系统中的功率上报方法, 包括:
用户设备( UE )支持同时在不同服务小区上分别发送侦听参考信号( SRS ) 和上行数据, 或 UE支持同时在不同服务小区上分别发送 SRS和上行控制信 息时, 所述 UE釆用下式之一计算发送 SRS的服务小区的功率余量(PH )信 息:
所述 PH信息 =UE在所述发送 SRS的服务小区的最大发送功率 - UE在所 述服务小区上估计的上行数据传输信道发送功率;
所述 PH信息 =UE在所述发送 SRS的服务小区的最大发送功率 -UE在所 述服务小区上估计的上行数据传输信道发送功率- SRS的发送功率;
UE上报功率余量报告 ( PHR )信息, 在所述 PHR信息中携带所述 PH 信息。
2、 如权利要求 1所述的方法, 其中,
当 UE 支持同时在不同服务小区上分别发送 SRS 和上行数据时, 所述 UE上报 PHR信息, 包括:
所述 UE同时在不同服务小区上分别发送 SRS和上行数据时, 向控制站 上报本 UE的 PHR信息;或者,所述 UE同时在不同服务小区上分别发送 SRS 和上行数据之前, 向控制站上 ^艮本 UE的 PHR信息。
3、 如权利要求 1所述的方法, 其中,
当 UE支持同时在不同服务小区上分别发送 SRS和上行控制信息时, 所 述 UE上报 PHR信息, 包括:
所述 UE同时在不同服务小区上分别发送 SRS和上行控制信息时, 向控 制站上报本 UE的 PHR信息; 或者, 所述 UE同时在不同服务小区上分别发 送 SRS和上行控制信息之前, 向控制站上报本 UE的 PHR信息。
4、 如权利要求 1或 2或 3所述的方法, 其中,
所述不同服务小区, 包括主服务小区和已激活的辅服务小区, 或任意两 个已激活的服务小区。
5、 如权利要求 4所述的方法, 其中,
所述不同的服务小区属于同一载波组或属于不同载波组。
6、 如权利要求 1所述的方法, 其中,
所述方法还包括,在所述 PHR信息中携带与所述 PH信息对应的所述服 务小区的指示标识, 当所述发送 SRS的小区中仅有 SRS发送时, 所述服务 小区的指示标识用于标识当前服务小区上无上行数据或上行控制信息发送。
7、 一种载波聚合系统中的功率上报装置, 位于用户设备(UE ) , 包括 功率余量( PH )信息计算模块和功率余量报告 ( PHR )信息上报模块,其中: 所述 PH信息计算模块, 设置为: 在当前 UE支持同时在不同服务小区 上分别发送侦听参考信号 (SRS )和上行数据, 或当前 UE支持同时在不同 服务小区上分别发送 SRS 和上行控制信息时, 釆用下式之一计算发送 SRS 的服务小区的 PH信息:
所述 PH信息 =UE在所述发送 SRS的服务小区的最大发送功率 - UE在所 述服务小区上估计的上行数据传输信道发送功率;
所述 PH信息 =UE在所述发送 SRS的服务小区的最大发送功率 -UE在所 述服务小区上估计的上行数据传输信道发送功率- SRS的发送功率;
所述 PHR信息上报模块, 设置为: 上报 PHR信息, 在所述 PHR信息中 携带所述 PH信息计算模块计算的 PH信息。
8、 如权利要求 7所述的装置, 其中,
所述 PHR信息上报模块设置为:在当前 UE支持同时在不同服务小区上 分别发送 SRS和上行数据时, 上报 PHR信息, 包括:
所述 PHR信息上报模块在当前 UE同时在不同服务小区上分别发送 SRS 和上行数据时, 向控制站上报本 UE的 PHR信息; 或者, 在当前 UE同时在 不同服务小区上分别发送 SRS和上行数据之前,向控制站上报本 UE的 PHR 信息。
9、 如权利要求 7所述的装置, 其中,
所述 PHR信息上报模块设置为:在当前 UE支持同时在不同服务小区上 分别发送 SRS和上行控制信息时, 上报 PHR信息, 包括:
所述 PHR信息上报模块在当前 UE同时在不同服务小区上分别发送 SRS 和上行控制信息时, 向控制站上报本 UE的 PHR信息; 或者, 在当前 UE同 时在不同服务小区上分别发送 SRS 和上行控制信息之前, 向控制站上报本 UE的 PHR信息。
10、 如权利要求 7或 8或 9所述的装置, 其中,
所述不同服务小区, 包括主服务小区和已激活的辅服务小区, 或任意两 个已激活的服务小区。
11、 如权利要求 10所述的装置, 其中,
所述不同的服务小区属于同一载波组或属于不同载波组。
12、 如权利要求 7所述的装置, 其中,
所述 PHR信息上报模块还设置为: 在所述 PHR信息中携带与所述 PH 信息对应的所述服务小区的指示标识, 当所述发送 SRS 的小区中仅有 SRS 发送时, 所述服务小区的指示标识用于标识当前服务小区上无上行数据或上 行控制信息发送。
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