WO2013023337A1 - 一种上行功率控制方法和装置 - Google Patents
一种上行功率控制方法和装置 Download PDFInfo
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- WO2013023337A1 WO2013023337A1 PCT/CN2011/078330 CN2011078330W WO2013023337A1 WO 2013023337 A1 WO2013023337 A1 WO 2013023337A1 CN 2011078330 W CN2011078330 W CN 2011078330W WO 2013023337 A1 WO2013023337 A1 WO 2013023337A1
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- path loss
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0073—Allocation arrangements that take into account other cell interferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/38—TPC being performed in particular situations
- H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
- H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
- H04W52/325—Power control of control or pilot channels
Definitions
- the present invention relates to the field of communications, and in particular, to a method and apparatus for uplink power control in a heterogeneous network scenario. Background technique
- the application scenario of Coordinated Multi-point (CoMP) transmission shown in Figure 1 has received extensive attention.
- the scenario is a heterogeneous network scenario.
- Multiple low-power RRHs (Remote Radio Heads) and a B eNB (Evolved Node Bs) share a cell in a cell. ID.
- the RRH is connected to the eNB through an optical fiber, and the eNB has a centralized controller function.
- the uplink power control is mainly used to compensate the path loss and shadow of the channel, and is used to suppress interference between cells.
- uplink power control is directed to a homogeneous network, that is, a cell scenario covered by one eNB.
- PUSCH Physical Uplink Shared Channel
- ⁇ PUSCH min(P max , 10 log 10 M + P O PUSCH + a - PL + A TP + f ( )) [dBm] ( 1 )
- ⁇ ⁇ User Equipment, user equipment
- M the number of RBs (Resource Blocks) allocated to the UE
- P Q - PUSeH consists of two parts: one is the cell-specific parameter provided by the upper layer ⁇ ⁇ MH ⁇ ⁇ , and the other part is the user-specific parameter ⁇ .
- Signal Receiving Power indicating the signal power received by the UE from the CRS.
- the original LTE uplink power control method based on CRS estimation path loss cannot effectively control the transmission power of the UE.
- the reason is that multiple low-power RRHs and eNBs coexist in one cell in this scenario.
- PDCCH Physical Downlink Control Channel
- all transmission points including RRHs and eNBs
- the power expression of a CRS signal received by a UE is:
- Tx is the i-th RRH transmission.
- the linear value of the power of the CRS, P1 represents the linear value of the path loss between the UE and the eNB, and ⁇ represents the linear value of the path loss between the UE and the i-th RRH.
- the setting of the reference signal power is based on whether the power of the CRS transmitted by the eNB or the power of the CRS transmitted by the RRH is determined.
- the downlink receives the signal power of the CRS transmitted from all the transmission points of the cell, and the uplink single point receives, so the uplink and downlink are asymmetric models.
- the path loss value based on the downlink CRS estimation is not the path loss of the real uplink single link, and the estimated path loss has an error.
- An object of the present invention is to provide an uplink power control method and apparatus in a heterogeneous network scenario to solve the problems indicated in the prior art.
- an uplink power control method includes: the user equipment sends a sounding reference signal SRS to the network side according to the received trigger signal; and the user equipment receives the network side according to the The path loss compensation value calculated and transmitted by the SRS; the user equipment estimates the path loss value according to the received cell-specific reference signal CRS; and the user equipment performs power compensation according to the path loss compensation value and the path loss value.
- an uplink power control method is further provided, where the method includes: a triggering step, the network side sends a trigger signal to the user equipment aperiodically to trigger the user equipment to send a detection reference signal SRS; a processing step, the network side receives the SRS sent by the user equipment, and calculates a path loss compensation value according to the SRS; in the sending step, the network side sends the path loss compensation value to the user equipment, so that the user equipment is configured according to the The road loss compensation value and the estimated path loss value are power compensated.
- a user equipment includes: a sending unit, which sends a sounding reference signal SRS to a network side according to the received trigger signal; and a receiving unit that receives the a path loss compensation value calculated and transmitted by the network side according to the SRS; an estimation unit that estimates a path loss value according to the received cell-specific reference signal CRS; and a calculation unit according to the path loss compensation value and the path loss value Perform power compensation.
- a base station includes: a triggering unit, which controls an RRH non-period triggering user equipment that is accessed by the user equipment to send a sounding reference signal SRS; Receiving the power of the SRS to calculate a path loss compensation value; and sending, by the sending unit, the path loss compensation value to the user equipment, so that the user equipment performs power compensation according to the path loss compensation value and the estimated path loss value.
- the network side estimates the path loss compensation value of the UE by triggering the RRH UE to send the aperiodic SRS signal, and the semi-static mode The UE is told to compensate for the inaccuracy of the path loss estimate, ensuring the effectiveness of the power control.
- FIG. 1 is a schematic diagram of an RRHs and an eNB sharing a cell ID in a heterogeneous network scenario
- FIG. 2 is a schematic diagram of uplink and downlink signals
- FIG. 3 is a flowchart of a power control method according to an embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
- FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description
- a path loss value PL Pulth Loss
- the uplink power control method can follow the power control in the homogeneous network scenario in the LTE; and the uplink access to the RRH user, that is, the RRH UE, is sent based on all the downlinks.
- the path loss value PL obtained by the CRS estimation has an error with the real value.
- the conventional uplink power control method cannot effectively control the transmission power of the RRH UE, and thus cannot effectively suppress interference between cells.
- An embodiment of the present invention provides an uplink power rate control method for an RRH UE in a heterogeneous network scenario for coordinated multi-point transmission, as described in Embodiment 1 and Embodiment 2 below.
- FIG. 3 is a flowchart of an uplink power control method according to an embodiment of the present invention.
- the method is applied to a UE that accesses an RRH in an uplink manner in a heterogeneous network scenario of coordinated multi-point transmission.
- the method is used.
- Step 301 The user equipment sends the sounding reference signal SRS to the network side according to the received trigger signal.
- Step 302 The user equipment receives the path loss compensation value calculated and sent by the network side according to the SRS.
- Step 303 The user equipment receives according to the The cell-specific reference signal CRS is used to estimate the path loss value.
- Step 304 The user equipment performs power compensation according to the path loss compensation value and the path loss value.
- the network side triggers the UE of the embodiment to send the SRS aperiodically.
- the eNB has a centralized control function, which configures the user to send the SRS related information, and controls the RRH non-period sending trigger signal accessed by the UE. After receiving the trigger signal, the UE sends the non-period Upstream SRS.
- the trigger signal here may be carried by RRC signaling, but this embodiment is not limited thereto.
- step 302 after receiving the SRS, the network side calculates a path loss compensation value / ⁇ according to the SRS, and sends the calculated path loss compensation value to the UE in this embodiment.
- all the transmission points on the network side receive the SRS, where the RRHs in the transmission point inform the eNB in the transmission point of the power of receiving the SRS through the backhaul (backhaul line), and the eNB calculates the path.
- the loss compensation value APL is further controlled by the eNB to control the RRH accessed by the UE to send the APL to the UE in a semi-static manner.
- steps 301 and 302 the specific processing involving the network side will be described in detail in the following embodiments.
- the user equipment first receives the CRS sent by all the transmission points (including RRHs, eNBs) on the network side, and then estimates the reference signal received power (RSRP) and the system message (referenceSignalPower, reference signal power) according to the CRS.
- Road loss value PL the reference signal received power
- the system message (referenceSignalPower, reference signal power) is determined as the power of the eNB to transmit the CRS, that is, in the embodiment, the setting of the system message (referenceSignalPower) characterizing the CRS transmission power.
- the power of the CRS transmitted by the eNB is taken as the standard.
- an error APL is required to transmit a CRS estimated path loss value PL and an actual path loss value based on all downlink downlinks. Make compensation.
- the user equipment may perform power compensation on the physical uplink control channel PUCCH according to the path loss compensation value and the path loss value, or perform physical physics according to the path loss compensation value and the path loss value. Power compensation of the uplink shared channel PUSCH.
- the UE compensates the path compensation value APL based on the CRS estimation path loss PL, and uses / ⁇ + / ⁇ as the power control formula, thereby compensating for coordinated multipoint transmission.
- the path loss estimation is inaccurate, thus ensuring the effectiveness of power control.
- ⁇ PUSCH min(P max , 10 log 10 M + P O PUSCH +a-(PL + APL dB ) + ⁇ ⁇ + /()) (3)
- P 0 P is the sum of the cell-specific parameter P ⁇ PraeH provided by the upper layer and the user-specific parameter P UE — PUSeH ; “the path loss compensation factor of 31 ⁇ ; PL is the estimated step 303 The path loss value; APL dB is the path loss compensation value received in step 302;
- a TF is a parameter related to the user uplink transmission format, allowing the transmission power per resource block to be adaptive to the user's transmission data rate; The closed-loop power control factor in the control fine-tunes the user's uplink power to achieve faster adaptive channel conditions.
- MA X represents the maximum transmit power of the UE
- a FPUeeH (F) is a message notified by the upper layer
- PUCCH format related if the user is configured by the upper layer to send PUCCH on two antenna ports, ⁇ ⁇ 3 ( ⁇ ') is informed by the upper layer, where F' represents the PUCCH format;
- PUCCH ⁇ is similar to ⁇ ⁇ - PUSCH, consisting of two parts ⁇ PUCCH _ ⁇ ) - NOMINAL - PUCCH ⁇ 0_UE_PUCCH where P MINH eH is a cell-specific parameter, P - UE - PUeCT is a user-specific parameter; , similar to /( ) in the PUSCH power control; PL is the path loss value estimated in step 303; APL dB is the path loss compensation value received in step 302.
- the UE sends the SRS signal to the network side aperiodically according to the non-periodic trigger signal of the network side, and then receives the path loss compensation value estimated by the network side, and estimates the path loss based on the downlink CRS. Based on the uplink power control, combined with the path loss compensation value, power compensation is performed to compensate for the inaccuracy of the path loss estimation, thereby ensuring the effectiveness of the power control.
- the embodiment of the present invention further provides an uplink power control method, as described in Embodiment 2 below.
- Example 2
- FIG. 4 is a flowchart of an uplink power control method according to an embodiment of the present disclosure. The method is applied to a network side of a heterogeneous network scenario for coordinated multi-point transmission. Referring to FIG. 4, the method includes:
- step 401 the network side sends a trigger signal to the user equipment in a non-period manner to trigger the user equipment to send the sounding reference signal SRS.
- step 402 the network side receives the SRS sent by the user equipment, and calculates a path loss compensation value according to the SRS.
- step 403 the network side sends the path loss compensation value to the user equipment, so that the user equipment compensates according to the path loss.
- the value and the estimated path loss value are used for power compensation.
- the base station eNB on the network side has a centralized control function, which configures the UE to transmit the related information of the aperiodic SRS, and controls the RRH accessed by the UE to send a corresponding trigger signal, thereby triggering the UE to send the aperiodic SRS signal.
- the trigger signal may be carried by an RRC (Radio Resource Control) message, where the RRC message carries related configuration information, such as a bandwidth, a subframe, and the like, for the UE to send the aperiodic SRS.
- RRC Radio Resource Control
- the base station eNB on the network side may control at least one RRH having the same cell ID as the eNB to receive the SRS sent by the user equipment, and then receive the power of the SRS sent by the at least one RRH, and then according to all points.
- the power loss calculation path loss compensation value is received (including the eNB itself and the at least one RRH) receiving the SRS.
- the at least one RRH may be all RRHs having the same cell ID as the base station eNB, or may be a part of the RRH having the same cell ID as the base station eNB, which is predetermined according to a predetermined policy (for example, a distance). limit.
- a predetermined policy for example, a distance). limit.
- the eNB is connected to all the RRHs. Through the backhaul, the eNB can notify all RRHs to receive the SRS signal sent by the UE. Through the backhaul, all RRHs can inform the eNB. Each receives the power of the SRS. The eNB may calculate the path loss compensation value APL according to the power of each RRH receiving the SRS and the power of the eNB receiving the SRS.
- the UE uplinks to the RRH1 as an example, that is, the RRH1 receives the uplink signal of the UE, and the eNB may calculate the path loss compensation value APL of the UE according to the following formula:
- the base station eNB on the network side can control the RRH accessed by the user equipment to send the path loss compensation value APL to the UE.
- the path loss compensation value can inform the user equipment in a semi-static manner.
- the UE is also notified by means of RRC signaling bearer.
- this embodiment is not limited thereto, and may be carried by other signaling, for example, or by using current resources.
- the base station triggers the RRH UE to send the aperiodic SRS signal, thereby estimating the path loss compensation value of the UE, and telling the UE in a semi-static manner, so that the UE is estimated based on the downlink CRS.
- the inaccuracy of the path loss estimation is compensated to ensure the effectiveness of the power control.
- the embodiment of the present invention further provides a user equipment, as described in the following Embodiment 3.
- the principle of the user equipment is similar to the downlink power control method of Embodiment 1. Therefore, the implementation of the user equipment can refer to the method. Implementation, repetition will not be repeated.
- FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
- the user equipment includes:
- the sending unit 51 sends the sounding reference signal SRS to the network side according to the received trigger signal
- the receiving unit 52 receives the path loss compensation value calculated and sent by the network side according to the SRS; the estimating unit 53 estimates the path loss value according to the received cell-specific reference signal CRS;
- the calculating unit 54 performs power compensation according to the path loss compensation value and the path loss value.
- the estimating unit 53 comprises:
- the receiving module 531 receives the CRS sent by all the sending points on the network side;
- An estimation module 532 which estimates the path loss value according to the reference signal received power RSRP of the CRS and the system message;
- the system message represents the power of the base station on the network side to send the CRS.
- the calculating unit 54 is specifically configured to advance according to the path loss compensation value and the path loss value.
- computing unit 54 includes:
- a first calculation module 541 which is performed according to the path loss compensation value and the path loss value by using the following formula
- ⁇ PUSCH min(P max , 10 log 10 M + P O PUSCH + a - (PL + APL) + A TP + f ( ));
- MINAL PUSa User-specific parameter P. – UE – the sum of PUSeH ; ⁇ is a 3 bit path loss compensation factor; PL is the path loss value; APL is the path loss compensation value;
- ⁇ ⁇ is a parameter related to the uplink transmission format of the user, allowing the transmission power of each resource block to be adaptive to the transmission data rate of the user; is a closed-loop power control factor in the uplink power control, fine-tuning the uplink power of the user, achieving faster Adaptive channel conditions.
- computing unit 54 includes:
- the second calculating module 542 performs power compensation of the PUCCH according to the path loss compensation value and the path loss value by using the following formula: ;
- P eMAX is the maximum transmit power of the UE
- h (n CQ! , n H 2 n Sii ) is a parameter related to the PUCCH format
- – PueeH is a cell specific parameter
- P. ⁇ NOMINAL PUeeH and user-specific parameter P.
- ⁇ UE the sum of PUeCT ; is the closed-loop control factor; PL is the path loss value; APL is the path loss compensation value.
- the UE sends the SRS signal to the network side aperiodically according to the non-periodic trigger signal of the network side, and then receives the path loss compensation value estimated by the network side, and performs uplink path estimation based on the downlink CRS estimation path loss. Based on the power control, combined with the path loss compensation value, power compensation is performed to compensate for the inaccuracy of the path loss estimation, thereby ensuring the effectiveness of the power control.
- the embodiment of the present invention further provides a base station.
- the principle of the base station solving the problem is similar to the downlink power control method of Embodiment 2. Therefore, the implementation of the base station can be implemented by referring to the method. It will not be repeated here.
- FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
- the base station includes: The triggering unit 61, which controls the RRH accessed by the UE to trigger the user equipment to send the sounding reference signal SRS;
- the processing unit 62 calculates a path loss compensation value according to the power of receiving the SRS;
- the sending unit 63 which controls the RRH accessed by the UE, sends the path loss compensation value to the user equipment, so that the user equipment performs power compensation according to the path loss compensation value and the estimated path loss value.
- the trigger unit 61 is specifically configured to control the remote radio head RRH that is accessed by the user equipment to send a trigger signal to the user equipment in a non-period manner, and trigger the user equipment to send the sounding reference signal SRS in a non-periodic manner.
- processing unit 62 includes:
- Control module 621 which controls at least one RRH having the same cell ID as the base station to receive an SRS sent by the user equipment;
- the receiving module 622 receives the SRS sent by the user equipment and the power of the SRS sent by the at least one RRH to receive the SRS.
- the calculation module 623 calculates a path loss compensation value according to the power of receiving the SRS and the power of the SRS sent by each RRH.
- the UE in the uplink accesses the RRH1, that is, the user is an RRH1 UE, and the calculation module 623 is specifically configured to calculate the path loss compensation value according to the following formula:
- the sending unit 63 is specifically configured to control the remote radio head RRH accessed by the user equipment to notify the user equipment of the path loss compensation value in a semi-static manner.
- the base station triggers the RRH UE to send the aperiodic SRS signal by controlling the RRH accessed by the UE, thereby estimating the path loss compensation value of the UE, and controlling the RRH to semi-statically notify the UE.
- the UE compensates the inaccuracy of the path loss estimation based on the original uplink power control based on the downlink CRS estimation path loss, and ensures the effectiveness of the power control.
- the embodiment of the invention further provides a computer readable program, wherein the program is executed in a user equipment
- the program causes the computer to perform the uplink power control method described in Embodiment 1 in the user equipment.
- the embodiment of the invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the uplink power control method described in Embodiment 1 in the user equipment.
- the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes the computer to execute the uplink power control method described in Embodiment 2 in the base station.
- the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the uplink power control method described in Embodiment 2 in a base station.
- the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
- the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
- Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
- the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
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Abstract
本发明实施例提供一种上行功率控制的方法和装置,所述方法包括:用户设备根据接收到的触发信号向网络侧发送探测参考信号SRS;用户设备接收所述网络侧根据所述SRS计算并发送的路损补偿值;用户设备根据接收到的小区专用参考信号CRS估计路损值;用户设备根据所述路损补偿值以及所述路损值进行功率补偿。本发明在原有基于下行CRS估计路径损耗进行上行功率控制的基础上,通过触发RRH UE发送非周期SRS信号,网络端估计出该UE的路损补偿值,半静态方式告诉UE,从而补偿路径损耗估计的不准确性,确保了功率控制的有效性。
Description
一种上行功率控制方法和装置 技术领域
本发明涉及通信领域,特别涉及一种异构网络场景下的上行功率控制的方法和装 置。 背景技术
在 LTE- Advanced ( LTE-A, Long Term Evolution- Advanced, 增强型长期演进) 系统中, 图 1所示的协作多点 (Coordinated Multi-point, CoMP)传输的应用场景受 到广泛关注。 如图 1 所示, 该场景是一种异构网络场景, 一个小区中的多个低功率 RRH ( Remote Radio Head, 远端无线头) 禾 B eNB ( evolved Node B, 演进型基站) 共 享一个小区 ID。 RRH与 eNB之间通过光纤连接, eNB端具有集中控制器功能。
在众多针对以上场景的研究点中, 其中一个是上行功率控制的问题。
上行功率控制主要用于补偿信道的路径损耗和阴影, 并用于抑制小区间的干扰。 在 LTE Rel-8/lO标准中, 上行功率控制针对的是同构网络, 即一个 eNB覆盖的小区 场景。 以 PUSCH ( Physical Uplink Shared Channel, 物理上行共享信道) 为例, 上行 功率控制表达式为:
^PUSCH = min(Pmax , 10 log10 M + PO PUSCH + a - PL + ATP + f ( )) [dBm] ( 1 ) 其中, Ρ υΕ ( User Equipment, 用户设备) 配置的最大发送功率; M是分 配给 UE的 RB ( Resource Block, 资源块) 数量; PQ— PUSeH包含两部分: 一部分是高 层提供的小区特定参数 ^ ^M H^^, 另外一部分是用户专用参数 Ρ。υΕ Ρ∞αι, 也就 是说, ^PUSCH = ^0_NOMINAL_PUSCH + PUSCH; "是 3bit的路径损耗补偿因子, 由高层 告知 UE; PL是 UE基于下行 CRS ( Cell-specific Reference Signal, 小区专用参考信 号 ) 信 号 估 计 的 路 径 损 耗 值 , 其 dB 值 表 达 式 为 PL(dB) = refer enceSignalPowerdB - higherlayerfilterdRSRPdB , 其中 WRP ( Reference
Signal Receiving Power, 参考信号接收功率) 表示 UE接收 CRS的信号功率。
然而, 在图 1所示的异构网络场景下, 原有 LTE基于 CRS估计路损进行上行功 率控制的方法不能有效控制 UE 的发送功率。 原因在于, 在该场景下多个低功率的 RRH和 eNB共存于一个小区。基于目前 LTE-A标准化的进展和各家公司的共同理解,
为了正确解调小区内所有 UE的 PDCCH (Physical Downlink Control Channel, 物理下 行控制信道), 小区中所有发送点 (包括 RRHs和 eNB ) 同时发送 CRS信号, 如图 2 所示。 在异构网络场景下, 某个 UE接收 CRS信号功率表达式为:
其中 表示 eNB发送 CRS的功率线性值, Tx 表示第 i个 RRH发送
CRS的功率线性值, Pl 表示 UE与 eNB之间的路径损耗线性值, Ρί 表示 UE 与第 i个 RRH之间的路径损耗线性值。
发明人在实现本发明的过程中发现, 一方面, 由于 RRH和 eNB具有不同的发送 功率等级, 以 10MHz系统带宽为例, eNB的发送功率为 46dBm, RRH的发送功率 为 30dBm; 表征 CRS发送功率的系统消息 (reference Signal Power, 参考信号功率) 的设定是以 eNB发送 CRS的功率为准还是以 RRH发送 CRS的功率为准, 目前并没 有确定。 另一方面, 对于某个上行单点接收 (某个 RRH或 eNB ) 的用户来说, 下行 收到来自小区所有发送点发送 CRS的信号功率, 而上行单点接收, 因此上下行是非 对称模型, 按照原有 LTE标准基于下行 CRS估计的路径损耗值并非真实的上行单链 路的路径损耗, 估计的路损存在误差。
应该注意, 上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、 完整的说明, 并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发 明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。 发明内容
本发明实施例的目的在于提供一种异构网络场景下的上行功率控制方法和装置, 以解决上述现有技术中所指出的问题。
根据本发明实施例的一个方面, 提供了一种上行功率控制方法, 所述方法包括: 用户设备根据接收到的触发信号向网络侧发送探测参考信号 SRS;用户设备接收所述 网络侧根据所述 SRS计算并发送的路损补偿值; 用户设备根据接收到的小区专用参 考信号 CRS估计路损值; 用户设备根据所述路损补偿值以及所述路损值进行功率补 偿。
根据本发明实施例的另一个方面,还提供了一种上行功率控制方法,所述方法包 括: 触发步骤, 网络侧非周期的向用户设备发送触发信号, 以触发所述用户设备发送
探测参考信号 SRS; 处理步骤, 网络侧接收用户设备发送的 SRS, 根据所述 SRS计 算路损补偿值; 发送步骤, 网络侧将所述路损补偿值发送给用户设备, 以便用户设备 根据所述路损补偿值以及估计的路损值进行功率补偿。
根据本发明实施例的又一个方面, 还提供了一种用户设备, 所述用户设备包括: 发送单元, 其根据接收到的触发信号向网络侧发送探测参考信号 SRS; 接收单元, 其 接收所述网络侧根据所述 SRS计算并发送的路损补偿值; 估计单元, 其根据接收到 的小区专用参考信号 CRS估计路损值; 计算单元, 其根据所述路损补偿值以及所述 路损值进行功率补偿。
根据本发明实施例的再一个方面,还提供了一种基站,所述基站包括:触发单元, 其控制用户设备所接入的 RRH非周期的触发用户设备发送探测参考信号 SRS; 处理 单元, 根据接收所述 SRS 的功率计算路损补偿值; 发送单元, 其将所述路损补偿值 发送给用户设备, 以便用户设备根据所述路损补偿值以及估计的路损值进行功率补 偿。
本发明实施例的有益效果在于: 在原有基于下行 CRS估计路径损耗进行上行功 率控制的基础上, 通过触发 RRH UE发送非周期 SRS信号, 网络端估计出该 UE的 路损补偿值, 半静态方式告诉 UE, 从而补偿路径损耗估计的不准确性, 确保了功率 控制的有效性。
参照后文的说明和附图,详细公开了本发明的特定实施方式, 指明了本发明的原 理可以被采用的方式。应该理解, 本发明的实施方式在范围上并不因而受到限制。在 所附权利要求的精神和条款的范围内,本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和 /或示出的特征可以以相同或类似的方式在一个或更多 个其它实施方式中使用, 与其它实施方式中的特征相组合, 或替代其它实施方式中的 特征。
应该强调, 术语"包括 /包含"在本文使用时指特征、 整件、 步骤或组件的存在, 但并不排除一个或更多个其它特征、 整件、 步骤或组件的存在或附加。 附图说明
参照以下的附图可以更好地理解本发明的很多方面。附图中的部件不是成比例绘 制的, 而只是为了示出本发明的原理。 为了便于示出和描述本发明的一些部分, 附图
中对应部分可能被放大或縮小。在本发明的一个附图或一种实施方式中描述的元素和 特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外,在 附图中,类似的标号表示几个附图中对应的部件, 并可用于指示多于一种实施方式中 使用的对应部件。 在附图中:
图 1是在异构网络场景中 RRHs和 eNB共享一个小区 ID的示意图;
图 2是上下行信号示意图;
图 3是本发明实施例提供的一种功率控制方法流程图;
图 4是本发明实施例提供的另一功率控制方法流程图;
图 5是本发明实施例提供的一种用户设备的组成示意图;
图 6是本发明实施例提供的一种基站的组成示意图。 具体实施方式
参照附图, 通过下面的说明书, 本发明实施例的前述以及其它特征将变得明显。 这些实施方式只是示例性的, 不是对本发明的限制。为了使本领域的技术人员能够容 易地理解本发明的原理和实施方式, 本发明的实施方式以 LTE-A系统中的协作多点 传输的异构网络场景下的上行功率控制方法为例进行说明,但可以理解,本发明实施 例并不限于上述系统, 对于涉及其他不同功率等级的传输点共享小区 ID的异构网络 系统均适用。
在图 1 所示的异构网络场景中, 对于上行接入到 eNB 的 UE, 也即宏小区 UE (macro UE), 基于小区内所有发送点发送的 CRS估计的路径损耗值 PL (Path Loss) 与真实值误差较小, 因此, 其上行功率控制方法可以沿用 LTE中同构网络场景下的 功率控制; 而对于上行接入到某个 RRH的用户, 也即 RRH UE, 基于下行所有点发 送的 CRS估计得到的路径损耗值 PL与真实值存在误差,传统的上行功率控制方法不 能有效控制 RRH UE的发送功率, 从而不能有效抑制小区间的干扰。
本发明实施例针对协作多点传输的异构网络场景中的 RRH UE,提出一种上行功 率控制方法, 如下面的实施例 1和实施例 2所述。
实施例 1
图 3为本发明实施例提供的一种上行功率控制方法的流程图,该方法应用于协作 多点传输的异构网络场景中上行接入到某个 RRH的 UE, 请参照图 3, 该方法包括:
步骤 301 : 用户设备根据接收到的触发信号向网络侧发送探测参考信号 SRS; 步骤 302: 用户设备接收所述网络侧根据所述 SRS计算并发送的路损补偿值; 步骤 303: 用户设备根据接收到的小区专用参考信号 CRS估计路损值; 步骤 304: 用户设备根据所述路损补偿值以及所述路损值进行功率补偿。
在步骤 301中, 网络侧会非周期的触发本实施例的 UE发送 SRS。在一个实施例 中, eNB具有集中控制功能, 它配置用户发送 SRS的相关信息, 并控制该 UE所接 入的上述 RRH非周期的发送触发信号, 该 UE接收到该触发信号后, 非周期发送上 行 SRS。 这里的触发信号可由 RRC信令承载, 但本实施例并不以此作为限制。
在步骤 302中, 网络侧接收到该 SRS后, 会根据该 SRS计算路损补偿值 /^, 并将计算出的路损补偿值 发送给本实施例的 UE。 在一个实施例中, 网络侧的所 有传输点都去接收该 SRS, 其中传输点中的 RRHs把接收 SRS的功率通过 backhaul (回程线路) 的方式告知传输点中的 eNB, 由该 eNB计算上述路损补偿值 APL, 再 由 eNB控制该 UE所接入的上述 RRH通过半静态的方式将该 APL发送给该 UE。
在步骤 301和步骤 302中,涉及网络侧的具体处理将在以下的实施例中进行详细 说明。
在步骤 303中, 用户设备首先接收所述网络侧的所有发送点(包括 RRHs, eNB) 发送的 CRS, 然后根据该 CRS 的参考信号接收功率 (RSRP ) 和系统消息 (referenceSignalPower, 参考信号功率) 估计路损值 PL。
在本实施例中, 为兼容 LTE版本, 该系统消息(referenceSignalPower, 参考信号 功率) 定为 eNB发送 CRS的功率, 也即在本实施例中, 表征 CRS发送功率的系统 消息 (referenceSignalPower) 的设定是以 eNB发送 CRS的功率为准。
在本实施例中, 如前所述, 对于上行接入到某个 RRH的用户, 也即 RRH UE, 基于下行所有点发送 CRS估计得到的路损值 PL与真实路损值存在误差 APL, 需要 进行补偿。
在步骤 304中, 用户设备可以根据所述路损补偿值和所述路损值, 进行物理上行 控制信道 PUCCH的功率补偿, 也可以根据所述路损补偿值和所述路损值, 进行物理 上行共享信道 PUSCH的功率补偿。
根据本实施例的方法, UE在基于 CRS估计路径损耗 PL的基础上, 补偿路径补 偿值 APL, 以/^ + /^^作为功率控制公式中 由此可以补偿协作多点传输的
异构网络场景下, 路径损耗估计的不准确性, 从而确保功率控制的有效性。
其中, 对于进行 PUSCH的功率补偿, 可以利用以下公式进行:
^PUSCH = min(Pmax , 10 log10 M + PO PUSCH +a-(PL + APLdB ) + ΔΤΡ + /()) (3) 其中, 是用户设备 UE配置的最大发送功率; M是分配给 UE的资源块 RB 数量; P0 P 是高层提供的小区特定参数 P ― PraeH与用户专用参数 P UE— PUSeH 之和; 《是31^的路径损耗补偿因子; PL是步骤 303估计的所述路损值; APLdB是 步骤 302接收的所述路损补偿值; ATF是与用户上行传输格式相关的参数, 允许每资 源块的传输功率自适应于用户的传输数据速率; 是上行功率控制中的闭环功控 因子, 对用户上行功率进行微调, 达到更快的自适应信道条件。
在该公式 (3) 中, 是以 PL + APZ^替换了公式 (1) 中的 PL
其中, 对于进行 PUCCH的功率补偿, 可以利用以下公式进行:
、 . I I
(PL + PLdB ) + h(nCQI, n Q, nSR) + A
其中, MAX表示 UE 的最大发送功率, AFPUeeH(F)是由高层告知的消息, 与
PUCCH格式有关; 如果用户由高层配置成在两个天线端口发送 PUCCH, 则 Δ Ζ3(^') 由高层告知, 其中 F'表示 PUCCH格式;
参数; PUCCH ^似于 Ρθ—PUSCH, 由两部 组成 Ρ PUCCH _ ^ί)— NOMINAL— PUCCH ^0_UE_PUCCH 其中, P MINHeH是小区特定参数, P― UE— PUeCT是用户专用参数; 是闭环控制 因子, 类似于 PUSCH功控中的 /( ); PL是步骤 303估计的所述路损值; APLdB是歩 骤 302接收的所述路损补偿值。
通过本发明实施例的上行功率控制方法, UE根据网络侧非周期的触发信号, 非 周期的向网络侧发送 SRS信号, 之后接收网络侧估计的路损补偿值, 在原有基于下 行 CRS估计路径损耗进行上行功率控制的基础上, 结合该路损补偿值, 进行功率补 偿, 从而补偿路径损耗估计的不准确性, 确保了功率控制的有效性。
对应实施例 1的 UE端的处理, 本发明实施例还提供了一种上行功率控制方法, 如下面的实施例 2所述。
实施例 2
图 4为本发明实施例提供的一种上行功率控制方法的流程图,该方法应用于协作 多点传输的异构网络场景的网络侧, 请参照图 4, 该方法包括:
触发步骤 401, 网络侧非周期的向用户设备发送触发信号, 以触发所述用户设备 发送探测参考信号 SRS;
处理步骤 402,网络侧接收用户设备发送的 SRS,根据所述 SRS计算路损补偿值; 发送步骤 403, 网络侧将所述路损补偿值发送给用户设备, 以便用户设备根据所 述路损补偿值以及估计的路损值进行功率补偿。
在步骤 401中, 网络侧的基站 eNB具有集中控制功能, 其配置该 UE发送非周 期 SRS 的相关信息, 并控制该 UE所接入的 RRH发送相应的触发信号, 从而触发 UE发送非周期 SRS信号。 这里的触发信号可以通过 RRC (Radio Resource Control, 无线资源控制) 消息承载, 其中, 该 RRC消息承载了 UE发送非周期 SRS的相关配 置信息, 例如带宽、 子帧等。
在步骤 402中, 网络侧的基站 eNB可以控制与所述 eNB具有相同小区 ID的至 少一个 RRH接收用户设备发送的 SRS, 然后接收该至少一个 RRH发送的接收所述 SRS的功率, 再根据所有点 (包括 eNB本身和所述至少一个 RRH)接收所述 SRS的 功率计算路损补偿值。
其中, 至少一个 RRH可以是与基站 eNB具有相同小区 ID的所有 RRH, 也可以 根据预定策略 (例如距离)所预先确定的与基站 eNB具有相同小区 ID的一部分 RRH, 本实施例并不以此作为限制。
其中, 在该异构网络场景下, eNB与所有 RRH之间是光纤连接, 通过回程线路 ( backhaul ), eNB端可以通知所有 RRHs接收此 UE发送的 SRS信号,通过该 backhaul, 所有 RRHs可以告诉 eNB各自接收 SRS的功率。 根据各 RRH接收 SRS的功率以及 eNB接收该 SRS的功率, eNB可以计算路损补偿值 APL。
在一个实施例中,以 UE上行接入到 RRH1为例,即 RRH1接收 UE的上行信号, eNB可以根据以下公式计算该 UE的路损补偿值 APL:
APL = P£: = -^ +— +— ^^- ( 6)
P
其中, Λ¾表示 eNB接收 UE发送的 SRS信号的功率值, (/ = 1, 2, ..JV) 表
示第 i个 RRH接收 UE发送的 SRS信号的功率, ΔΓ. (i = 1, 2, ...N)表示 eNB
和第 i个 RRH发送 CRS的功率比值。在 eNB和所有 RRH没有做 CRS功率增强的情 况下, 以 10MHz系统带宽为例, eNB的总发送功率为 46dBm, 每个 RRH的总发送 功率均为 30dBm, eNB 与每个 RRH 发送 CRS 的功率均相差 16dB, 即 Δη = 40 ( = 1,2,···,Λ 。
在步骤 403中,网络侧的基站 eNB可以控制所述用户设备所接入的 RRH将所述 路损补偿值 APL发送给 UE。 在一个实施例中, 该路损补偿值可以通过半静态方式告 知用户设备。例如, 同样通过 RRC信令承载的方式告知 UE。但本实施例并不以此作 为限制, 例如也可以通过其他信令承载, 或者沿用目前的资源。
通过本发明实施例提供的上行功率控制方法, 基站通过触发 RRH UE发送非周 期 SRS信号, 从而估计出该 UE的路损补偿值, 并半静态方式告诉该 UE, 使得 UE 在原有基于下行 CRS估计路径损耗进行上行功率控制的基础上, 补偿路径损耗估计 的不准确性, 确保了功率控制的有效性。
本发明实施例还提供了一种用户设备, 如下面的实施例 3所述, 由于该用户设备 解决问题的原理与实施例 1的下行功率控制方法相似,因此该用户设备的实施可以参 见方法的实施, 重复之处不再赘述。
实施例 3
图 5为本发明实施例提供的一种用户设备的组成示意图, 请参照图 5, 该用户设 备包括:
发送单元 51, 其根据接收到的触发信号向网络侧发送探测参考信号 SRS ;
接收单元 52, 其接收所述网络侧根据所述 SRS计算并发送的路损补偿值; 估计单元 53, 其根据接收到的小区专用参考信号 CRS估计路损值;
计算单元 54, 其根据所述路损补偿值以及所述路损值进行功率补偿。
在一个实施例中, 该估计单元 53包括:
接收模块 531, 其接收所述网络侧的所有发送点发送的 CRS ;
估计模块 532,其根据所述 CRS的参考信号接收功率 RSRP和系统消息估计所述 路损值;
其中, 所述系统消息代表了所述网络侧的基站发送所述 CRS的功率。
在一个实施例中, 计算单元 54具体用于根据所述路损补偿值和所述路损值, 进
行物理上行控制信道 PUCCH的功率补偿, 或者进行物理上行共享信道 PUSCH的功 率补偿。
在一个实施例中, 计算单元 54包括:
第一计算模块 541, 其根据所述路损补偿值和所述路损值, 利用以下公式进行
PUSCH的功率补偿:
^PUSCH = min(Pmax , 10 log10 M + PO PUSCH + a - (PL + APL) + ATP + f ( ));
其中, 是用户设备 UE配置的最大发送功率; M是分配给 UE的资源块 RB 数量; ^PUSCH是高层提供的小区特定参数 P。— N。MINAL PUSa^用户专用参数 P。— UE— PUSeH 之和; α是 3bit的路径损耗补偿因子; PL是所述路损值; APL是所述路损补偿值;
ΔΤΡ是与用户上行传输格式相关的参数, 允许每资源块的传输功率自适应于用户的传 输数据速率; 是上行功率控制中的闭环功控因子, 对用户上行功率进行微调, 达到更快的自适应信道条件。
在另外一个实施例中, 计算单元 54包括:
其中, PeMAX是 UE的最大发送功率; AF PUeeH (F)和 是由高层告知的消 息; h (nCQ! , nH 2 nSii )是与 PUCCH 格式相关的参数; Ρ。— PueeH是小区特定参数
P。― NOMINAL— PUeeH和用户专用参数 P。― UE— PUeCT之和; 是闭环控制因子; PL是所述路 损值; APL是所述路损补偿值。
通过本发明实施例的用户设备, UE根据网络侧非周期的触发信号, 非周期的向 网络侧发送 SRS信号, 之后接收网络侧估计的路损补偿值, 在原有基于下行 CRS估 计路径损耗进行上行功率控制的基础上, 结合该路损补偿值, 进行功率补偿, 从而补 偿路径损耗估计的不准确性, 确保了功率控制的有效性。
本发明实施例还提供了一种基站, 如下面的实施例 4所述, 由于该基站解决问题 的原理与实施例 2 的下行功率控制方法相似, 因此该基站的实施可以参见方法的实 施, 重复之处不再赘述。
实施例 4
图 6为本发明实施例提供的一种基站的组成示意图, 请参照图 6, 该基站包括:
触发单元 61, 其控制 UE所接入的 RRH来非周期的触发用户设备发送探测参考 信号 SRS ;
处理单元 62, 其根据接收所述 SRS的功率计算路损补偿值;
发送单元 63, 其控制 UE所接入的 RRH将所述路损补偿值发送给用户设备, 以 便用户设备根据所述路损补偿值以及估计的路损值进行功率补偿。
在一个实施例中, 触发单元 61具体用于控制所述用户设备所接入的远端无线头 RRH 非周期的向所述用户设备发送触发信号, 以非周期的触发用户设备发送探测参 考信号 SRS。
在一个实施例中, 处理单元 62包括:
控制模块 621,其控制与所述基站具有相同小区 ID的至少一个 RRH接收所述用 户设备发送的 SRS ;
接收模块 622, 其接收用户设备发送的 SRS以及所述至少一个 RRH发送的接收 所述 SRS的功率;
计算模块 623,其根据接收所述 SRS的功率和各个 RRH发送的接收所述 SRS的 功率计算路损补偿值。
在一个实施例中, 上行链路中 UE接入到 RRH1 , 即该用户为 RRH1 UE, 计算模 块 623具体用于根据以下公式计算所述路损补偿值:
L = P^near = Κχο I i I i Rx i .
PLestimate RXRRHI A^! i=2 RxRRH1
其中, 。为所述基站接收所述 UE发送的 SRS信号的功率值, RxRRHi (i = \, 2, ...N) 为第 i个 RRH接收所述 UE发送的 SRS信号的功率, ΔΓ = "° lmmr表示所述基站
T
和第 i个 RRH发送 CRS的功率比值。
在一个实施例中, 发送单元 63具体用于控制所述用户设备所接入的远端无线头 RRH以半静态方式, 将所述路损补偿值告知所述用户设备。
通过本发明实施例提供的基站,基站通过控制 UE所接入的 RRH来触发 RRH UE 发送非周期 SRS信号, 从而估计出该 UE的路损补偿值, 并控制该 RRH半静态方式 告诉该 UE,使得 UE在原有基于下行 CRS估计路径损耗进行上行功率控制的基础上, 补偿路径损耗估计的不准确性, 确保了功率控制的有效性。
本发明实施例还提供了一种计算机可读程序, 其中当在用户设备中执行该程序
时, 该程序使得计算机在所述用户设备中执行实施例 1所述的上行功率控制方法。 本发明实施例还提供了一种存储有计算机可读程序的存储介质,其中该计算机可 读程序使得计算机在用户设备中执行实施例 1所述的上行功率控制方法。
本发明实施例还提供了一种计算机可读程序,其中当在基站中执行该程序时, 该 程序使得计算机在所述基站中执行实施例 2所述的上行功率控制方法。
本发明实施例还提供了一种存储有计算机可读程序的存储介质, 其中该计算机可 读程序使得计算机在基站中执行实施例 2所述的上行功率控制方法。
本发明以上的装置和方法可以由硬件实现, 也可以由硬件结合软件实现。本发明 涉及这样的计算机可读程序, 当该程序被逻辑部件所执行时, 能够使该逻辑部件实现 上文所述的装置或构成部件, 或使该逻辑部件实现上文所述的各种方法或步骤。逻辑 部件例如现场可编程逻辑部件、微处理器、计算机中使用的处理器等。本发明还涉及 用于存储以上程序的存储介质, 如硬盘、 磁盘、 光盘、 DVD、 flash存储器等。
以上结合具体的实施方式对本发明进行了描述,但本领域技术人员应该清楚, 这 些描述都是示例性的, 并不是对本发明保护范围的限制。本领域技术人员可以根据本 发明的精神和原理对本发明做出各种变型和修改,这些变型和修改也在本发明的范围 内。
Claims
1、 一种上行功率控制方法, 其中, 所述方法包括:
用户设备根据接收到的触发信号向网络侧发送探测参考信号 SRS;
用户设备接收所述网络侧根据所述 SRS计算并发送的路损补偿值;
用户设备根据接收到的小区专用参考信号 CRS估计路损值;
用户设备根据所述路损补偿值以及所述路损值进行功率补偿。
2、 根据权利要求 1所述的方法, 其中, 所述用户设备根据接收到的小区专用参 考信号 CRS估计路损值, 包括:
用户设备接收所述网络侧的所有发送点发送的 CRS;
用户设备根据所述 CRS的参考信号接收功率 RSRP和系统消息估计所述路损值; 其中, 所述系统消息为所述网络侧的基站发送所述 CRS的功率。
3、 根据权利要求 1所述的方法, 其中, 所述用户设备根据所述路损补偿值以及 所述路损值进行功率补偿, 包括:
用户设备根据所述路损补偿值和所述路损值, 进行物理上行控制信道 PUCCH的 功率补偿, 或者进行物理上行共享信道 PUSCH的功率补偿。
4、 根据权利要求 3所述的方法, 其中, 所述用户设备根据所述路损补偿值和所 述路损值, 利用以下公式进行 PUSCH的功率补偿:
^PUSCH = min(Pmax , 10 log10 M + PO PUSCH + a - (PL + APL) + ATP + f ( ));
其中, 是用户设备 UE ffi置的最大发送功率; M是分配给 UE的资源块 RB 数量; ^PUSCH是高层提供的小区特定参数 P。— N。MINAL PUSQ^用户专用参数 P。— UE— PUSCT 之和; α是 3比特的路径损耗补偿因子; PL是所述路损值; APL是所述路损补偿值; ΔΤΡ是与用户上行传输格式相关的参数; f ( ) 是上行功率控制中的闭环功控因子。
其中, MAX是 UE 的最大发送功率; AF PUeeH ( 和 Δ Ζ3( ')是由高层告知的消 息; , , )是与 PUCCH 格式相关的参数; ^^^^是小区特定参数
P。― NOMINAL— PUeeH和用户专用参数 P。― UE— PUeeH之和; ^')是闭环控制因子; PL是所述路 损值; APL是所述路损补偿值。
6、 一种上行功率控制方法, 其中, 所述方法包括:
触发步骤, 网络侧非周期的向用户设备发送触发信号, 以触发所述用户设备发送 探测参考信号 SRS ;
处理步骤, 网络侧接收用户设备发送的 SRS, 根据所述 SRS计算路损补偿值; 发送步骤, 网络侧将所述路损补偿值发送给用户设备, 以便用户设备根据所述路 损补偿值以及估计的路损值进行功率补偿。
7、 根据权利要求 6所述的方法, 其中, 所述触发步骤包括:
所述网络侧的基站 eNB控制所述用户设备所接入的远端无线头 RRH非周期的向 所述用户设备发送所述触发信号。
8、 根据权利要求 6所述的方法, 其中, 所述处理步骤包括:
所述网络侧的基站 eNB接收所述 SRS ,并控制与所述 eNB具有相同小区 ID的至 少一个 RRH接收所述 SRS ;
所述网络侧的所述至少一个 RRH将接收所述 SRS的功率发送给所述网络侧的基 站 eNB ;
所述网络侧的基站 eNB根据接收所述 SRS的功率以及各个 RRH接收所述 SRS 的功率计算路损补偿值。
9、根据权利要求 8所述的方法,其中,所述网络侧的基站 eNB根据接收所述 SRS 的功率以及各个 RRH接收所述 SRS的功率计算路损补偿值, 包括:
所述网络侧的基站 eNB根据以下公式计算所述路损补偿值:
= P^near = Rx I 1 I i Rx
PLestimate RXRRHI Α^ί ;=2 RxRRH1
其中, RRHl为所述用户设备接入的 RRH, R c。为所述基站 eNB接收所述 UE发 送的 SRS信号的功率值, Rx (i = 1, 2, ...N) 为第 i个 RRH接收所述 UE发送的 SRS 信号的功率, ΔΓ = 0 Unear表示所述基站 eNB和第 i个 RRH发送 CRS的功率比值。
10、 根据权利要求 6所述的方法, 其中, 所述发送步骤包括:
所述网络侧的基站 eNB控制所述用户设备所接入的远端无线头 RRH以半静态方 式, 将所述路损补偿值告知所述用户设备。
11、 一种用户设备, 其中, 所述用户设备包括: 发送单元, 其根据接收到的触发信号向网络侧发送探测参考信号 SRS ;
接收单元, 其接收所述网络侧根据所述 SRS计算并发送的路损补偿值; 估计单元, 其根据接收到的小区专用参考信号 CRS估计路损值;
计算单元, 其根据所述路损补偿值以及所述路损值进行功率补偿。
12、 根据权利要求 11所述的用户设备, 其中, 所述估计单元包括:
接收模块, 其接收所述网络侧的所有发送点发送的 CRS ;
估计模块,其根据所述 CRS的参考信号接收功率 RSRP和系统消息估计所述路损 值;
其中, 所述系统消息为所述网络侧的基站发送所述 CRS的功率。
13、 根据权利要求 11 所述的用户设备, 其中, 所述计算单元具体用于根据所述 路损补偿值和所述路损值, 进行物理上行控制信道 PUCCH的功率补偿, 或者进行物 理上行共享信道 PUSCH的功率补偿。
14、 根据权利要求 13所述的用户设备, 其中, 所述计算单元包括:
第一计算模块,其根据所述路损补偿值和所述路损值,利用以下公式进行 PUSCH 的功率补偿:
^PUSCH = min(Pmax , 10 log10 M + PO PUSCH + a (PL + APL) + ATP + f ( ));
其中, 是用户设备 UE配置的最大发送功率; M是分配给 UE的资源块 RB 数量; ^PUSCH是高层提供的小区特定参数 P。— N。MINAL PUSa^用户专用参数 P。— UE— PUSeH 之和; α是 3bit的路径损耗补偿因子; PL是所述路损值; APL是所述路损补偿值; Atf是与用户上行传输格式相关的参数; 是上行功率控制中的闭环功控因子。
15、 根据权利要求 13所述的用户设备, 其中, 所述计算单元包括:
第二计算模块,其根据所述路损补偿值和所述路损值,利用以下公式进行 PUCCH 的功率补偿:
,
― rnin / \ . , /、卜, 尸。— (PL + APL) h [nc
其 "中, 1^^是― UE 的最大发送功率; AF PUeeH (F)和 Δ Ζ3 ( ')是由高层告知的消 息; h (nCQ! , nH 2 n ^是与 PUCCH 格式相关的参数; Ρ。 PueeH是小区特定参数
P。― 皿― PueeH和用户专用参数 P。― UE PU ^之和; 是闭环控制因子; PL是所述路 损值; 是所述路损补偿值。
16、 一种基站, 其中, 所述基站包括: 触发单元, 其控制用户设备所接入的 RRH非周期的触发用户设备发送探测参考 信号 SRS ;
处理单元, 其根据接收所述 SRS的功率计算路损补偿值;
发送单元, 其将所述路损补偿值发送给用户设备, 以便用户设备根据所述路损补 偿值以及估计的路损值进行功率补偿。
17、 根据权利要求 16所述的基站, 其中, 所述触发单元具体用于控制所述用户 设备所接入的远端无线头 RRH非周期的向所述用户设备发送触发信号, 以非周期的 触发用户设备发送探测参考信号 SRS。
18、 根据权利要求 16所述的基站, 其中, 所述处理单元包括:
控制模块, 其控制与所述基站具有相同小区 ID的至少一个 RRH接收所述 SRS ; 接收模块,其接收所述 SRS以及所述至少一个 RRH发送的接收所述 SRS的功率; 计算模块,其根据接收所述 SRS的功率以及各个 RRH接收所述 SRS的功率计算 路损补偿值。
其中, RRH1为所述用户设备接入的 RRH, R;c。为所述基站 eNB接收所述 UE 发送的 SRS信号的功率值, Rx (i = l, 2, ...N) 为第 i个 RRH接收所述 UE发送的
SRS信号的功率, Δ7 = 0 Unear表示所述基站 eNB和第 i个 RRH发送 CRS的功率
R^XRRHI
比值。
20、 根据权利要求 16所述的基站, 其中, 所述发送单元具体用于控制所述用户 设备所接入的远端无线头 RRH以半静态方式,将所述路损补偿值告知所述用户设备。
21、一种计算机可读程序, 其中当在用户设备中执行该程序时, 该程序使得计算 机在所述用户设备中执行如权利要求 1-5任意一项所述的上行功率控制方法。
22、一种存储有计算机可读程序的存储介质,其中该计算机可读程序使得计算机 在用户设备中执行如权利要求 1-5任意一项所述的上行功率控制方法。
23、一种计算机可读程序, 其中当在基站中执行该程序时, 该程序使得计算机在 所述基站中执行如权利要求 6- 10任意一项所述的上行功率控制方法。
24、 一种存储有计算机可读程序的存储介质, 其中该计算机可读程序使得计算机 在基站中执行如权利要求 6-10任意一项所述的上行功率控制方法。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114007257A (zh) * | 2020-07-28 | 2022-02-01 | 华为技术有限公司 | 确定传输功率的方法及装置 |
CN114128168A (zh) * | 2019-05-14 | 2022-03-01 | 株式会社Ntt都科摩 | 用户终端以及无线通信方法 |
CN114375029A (zh) * | 2021-12-27 | 2022-04-19 | 天翼物联科技有限公司 | NB-IoT水表功率控制优化方法、系统、装置及存储介质 |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013062359A1 (en) * | 2011-10-26 | 2013-05-02 | Lg Electronics Inc. | Method for determining transmission power information of downlink subframe and apparatus therefor |
AU2015385199B2 (en) * | 2015-03-02 | 2019-02-21 | Telefonaktiebolaget Lm Ericsson (Publ) | A network node and a method therein for determining a mobility criterion |
WO2016182320A1 (en) * | 2015-05-10 | 2016-11-17 | Lg Electronics Inc. | Method and apparatus for adapting repetition level for uplink transmission in wireless communication system |
US10397024B2 (en) * | 2016-03-04 | 2019-08-27 | Intel IP Corporation | Signaling for uplink sounding |
CN107231680B (zh) | 2016-03-23 | 2021-04-30 | 中兴通讯股份有限公司 | 一种开环功率控制的方法和装置 |
AU2016406586B2 (en) * | 2016-05-13 | 2020-02-13 | Huawei Technologies Co.,Ltd. | Power control method and apparatus |
CN107623648B (zh) * | 2016-07-14 | 2020-07-10 | 诸暨市元畅信息技术咨询服务部 | 一种业务数据发送方法及第一物理小区 |
EP3282776B1 (en) * | 2016-08-10 | 2020-04-29 | ASUSTek Computer Inc. | Method and apparatus for pathloss derivation for beam operation in a wireless communication system |
CN106793028B (zh) * | 2016-11-29 | 2020-08-28 | 海能达通信股份有限公司 | 传输功率的控制方法及用户设备 |
KR102317121B1 (ko) * | 2017-06-29 | 2021-10-25 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | 신호를 전송하는 방법, 단말 장치와 네트워크 장치 |
CN109842929B (zh) * | 2017-11-24 | 2022-07-05 | 大唐移动通信设备有限公司 | 一种功率控制偏移量的获取方法及装置 |
CN110087296B (zh) * | 2018-01-25 | 2021-12-10 | 成都华为技术有限公司 | 一种功率控制方法及装置 |
KR20230082688A (ko) * | 2018-04-05 | 2023-06-08 | 텔레폰악티에볼라겟엘엠에릭슨(펍) | 공중 ue에 대한 공수 상태 종속 업링크 전력 제어 관련 작업 |
CN114451022B (zh) * | 2019-09-30 | 2024-06-11 | 华为技术有限公司 | 功率调整方法及装置 |
CN111491319B (zh) * | 2020-04-17 | 2023-01-17 | 展讯通信(上海)有限公司 | 路损确定方法及装置、存储介质、终端 |
US12058532B2 (en) * | 2020-05-04 | 2024-08-06 | Qualcomm Incorporated | Estimating features of a radio frequency band based on an inter-band reference signal |
WO2022094848A1 (zh) * | 2020-11-05 | 2022-05-12 | 海能达通信股份有限公司 | 一种通信网络抗干扰的方法、装置及系统 |
CN115734265A (zh) * | 2021-08-31 | 2023-03-03 | 北京紫光展锐通信技术有限公司 | 通信方法及装置、计算机可读存储介质 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101662824A (zh) * | 2009-09-11 | 2010-03-03 | 北京邮电大学 | 协作多点系统、用户设备和上行功率控制方法 |
CN101883415A (zh) * | 2009-05-05 | 2010-11-10 | 大唐移动通信设备有限公司 | 探测参考信号发送功率配置方法、网络侧设备及ue |
CN101902750A (zh) * | 2009-05-26 | 2010-12-01 | 大唐移动通信设备有限公司 | 一种调整功率参数值的方法和设备 |
CN102056178A (zh) * | 2011-01-17 | 2011-05-11 | 新邮通信设备有限公司 | 一种小区间的干扰协调方法和一种基站 |
CN102056218A (zh) * | 2009-10-28 | 2011-05-11 | 中兴通讯股份有限公司 | 上行链路功率控制的方法及装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
UA96181C2 (ru) * | 2007-02-14 | 2011-10-10 | Квелкомм Инкорпорейтед | Управление мощностью на основе прембулы в восходящей линии связи для lte |
KR101674940B1 (ko) * | 2009-01-29 | 2016-11-10 | 엘지전자 주식회사 | 전송 전력을 제어하는 방법 및 이를 위한 장치 |
JP5985828B2 (ja) * | 2009-02-09 | 2016-09-06 | インターデイジタル パテント ホールディングス インコーポレイテッド | 複数キャリアを使用する無線送受信機ユニットのアップリンク電力制御のための装置および方法 |
WO2011145890A2 (ko) * | 2010-05-20 | 2011-11-24 | 엘지전자 주식회사 | 상향링크 전력제어 방법 및 사용자기기 |
US20130114562A1 (en) * | 2010-07-16 | 2013-05-09 | Lg Electronics Inc. | Method and apparatus for controlling uplink transmission power in wireless communication system |
JP4852166B1 (ja) * | 2010-08-04 | 2012-01-11 | シャープ株式会社 | 移動局装置、通信システム、通信方法および集積回路 |
US9036584B2 (en) * | 2010-08-09 | 2015-05-19 | Panasonic Intellectual Property Corporation Of America | Base station, mobile station, method for transmitting calculation parameters for power headroom, and method for transmitting power headroom |
US9131457B2 (en) * | 2010-08-12 | 2015-09-08 | Samsung Electronics Co., Ltd. | Apparatus and method for transmission of uplink sounding reference signals in a wireless network |
EP2695450A4 (en) * | 2011-04-01 | 2014-09-10 | Intel Corp | UPLINK POWER CONTROL METHOD FOR RRH SYSTEMS DISTRIBUTED WITH THE SAME CELL ID |
US9491717B2 (en) * | 2011-05-06 | 2016-11-08 | Lg Electronics Inc. | Method for determining uplink transmission power in a network including a plurality of cells, and apparatus therefor |
CN103621155B (zh) * | 2011-06-21 | 2018-09-28 | 瑞典爱立信有限公司 | 用于上行链路发送的发送功率控制的用户设备及其方法 |
BR112014002188A2 (pt) * | 2011-08-03 | 2017-03-01 | Huawei Tech Co Ltd | método de controle de energia de transmissão de dados ascendentes, estação de base e equipamento do usuário |
-
2011
- 2011-08-12 KR KR1020147004317A patent/KR20140038557A/ko not_active Ceased
- 2011-08-12 CN CN2011800694568A patent/CN103444237A/zh active Pending
- 2011-08-12 WO PCT/CN2011/078330 patent/WO2013023337A1/zh unknown
- 2011-08-12 JP JP2014524246A patent/JP2014523219A/ja not_active Withdrawn
- 2011-08-12 EP EP11871052.4A patent/EP2744277A4/en not_active Withdrawn
-
2014
- 2014-01-23 US US14/162,025 patent/US20140133448A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101883415A (zh) * | 2009-05-05 | 2010-11-10 | 大唐移动通信设备有限公司 | 探测参考信号发送功率配置方法、网络侧设备及ue |
CN101902750A (zh) * | 2009-05-26 | 2010-12-01 | 大唐移动通信设备有限公司 | 一种调整功率参数值的方法和设备 |
CN101662824A (zh) * | 2009-09-11 | 2010-03-03 | 北京邮电大学 | 协作多点系统、用户设备和上行功率控制方法 |
CN102056218A (zh) * | 2009-10-28 | 2011-05-11 | 中兴通讯股份有限公司 | 上行链路功率控制的方法及装置 |
CN102056178A (zh) * | 2011-01-17 | 2011-05-11 | 新邮通信设备有限公司 | 一种小区间的干扰协调方法和一种基站 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114128168A (zh) * | 2019-05-14 | 2022-03-01 | 株式会社Ntt都科摩 | 用户终端以及无线通信方法 |
CN114128168B (zh) * | 2019-05-14 | 2024-01-23 | 株式会社Ntt都科摩 | 用户终端以及无线通信方法 |
CN114007257A (zh) * | 2020-07-28 | 2022-02-01 | 华为技术有限公司 | 确定传输功率的方法及装置 |
WO2022022517A1 (zh) * | 2020-07-28 | 2022-02-03 | 华为技术有限公司 | 确定传输功率的方法及装置 |
CN114375029A (zh) * | 2021-12-27 | 2022-04-19 | 天翼物联科技有限公司 | NB-IoT水表功率控制优化方法、系统、装置及存储介质 |
CN114375029B (zh) * | 2021-12-27 | 2023-06-27 | 天翼物联科技有限公司 | NB-IoT水表功率控制优化方法、系统、装置及存储介质 |
Also Published As
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US20140133448A1 (en) | 2014-05-15 |
JP2014523219A (ja) | 2014-09-08 |
CN103444237A (zh) | 2013-12-11 |
KR20140038557A (ko) | 2014-03-28 |
EP2744277A4 (en) | 2014-12-24 |
EP2744277A1 (en) | 2014-06-18 |
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