WO2008095378A1 - Dispositif et procédé de régulation de puissance d'une liaison montante - Google Patents

Dispositif et procédé de régulation de puissance d'une liaison montante Download PDF

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Publication number
WO2008095378A1
WO2008095378A1 PCT/CN2007/003868 CN2007003868W WO2008095378A1 WO 2008095378 A1 WO2008095378 A1 WO 2008095378A1 CN 2007003868 W CN2007003868 W CN 2007003868W WO 2008095378 A1 WO2008095378 A1 WO 2008095378A1
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WIPO (PCT)
Prior art keywords
transmit power
channel
dpcch
power control
uplink
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PCT/CN2007/003868
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English (en)
French (fr)
Inventor
Focai Peng
Cuihong Han
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ZTE Corp
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ZTE Corp
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Priority to EP07855869.9A priority Critical patent/EP2120361A4/en
Priority to US12/525,399 priority patent/US8233419B2/en
Publication of WO2008095378A1 publication Critical patent/WO2008095378A1/zh
Anticipated expiration legal-status Critical
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04Transmission power control [TPC]
    • H04W52/06TPC algorithms
    • H04W52/14Separate analysis of uplink or downlink
    • H04W52/146Uplink power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04Transmission power control [TPC]
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/28TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
    • H04W52/286TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission during data packet transmission, e.g. high speed packet access [HSPA]

Definitions

  • the present invention relates to a power control technology in a Wideband Code Division Multiple Access (WCDMA) mobile communication system, and more particularly to a High Speed Packet Access Evolution (HSPA+) system.
  • WCDMA Wideband Code Division Multiple Access
  • HSPA+ High Speed Packet Access Evolution
  • a power control device and method for enhancing a dedicated channel Enhanced Dedicated CHannel, hereinafter referred to as E-DCH). Background technique
  • RP-060844 “Proposed W1D for Higher Order Modulation in HSUPA”
  • Evolved High Speed Packet Access HSPA + data in the forthcoming E-DCH A new high-order modulation method of 16-order quadrature amplitude modulation (hereinafter referred to as 16QAM) is added to the channel.
  • 16QAM 16-order quadrature amplitude modulation
  • 16QAM will be modulated in 4-phase pulse amplitude in the same phase (ie, I channel) (4 Pulse-Amplitude Modulation, the following 4PAM) and quadrature phase (ie, Q-way) 4PAM paired multiplexing to achieve 16QAM equivalently.
  • the terminal (hereinafter referred to as the UE) needs to specify a dedicated pilot (Pilot) of the Dedicated Physical Control CHannel (hereinafter referred to as DPCCH), The number of bits in the Transport Format Combination Indicator (TFCI), the Send Back Information (FBI), and the Transmit Power Control (TPC).
  • DPCCH Dedicated Physical Control CHannel
  • TFCI Transport Format Combination Indicator
  • FBI Send Back Information
  • TPC Transmit Power Control
  • the UE is the E-DCH, and there is no concurrent dedicated physical data channel.
  • DPCCH Dedicated Physical Data CHannel, the lower one is called DPDCH
  • DPCCH will use the "8 Pilot bits + 2 TPC bits" transmission method (the following description refers to the use of "8 if not specified" Pilot bit + 2 TPC bit "transmit mode”.
  • the UE will perform power control on the transmit power of the uplink DPCCH, for example, a 1500 Hz power control method performed every time slot and a 300 Hz power control method combined with 5 time slots.
  • the UE performs power control on the transmit power of the Enhanced Dedicated Physical Data CHannel (hereinafter referred to as E-DPDCH) by setting E- The power difference of DPDCH relative to DPCCH.
  • E-DPDCH Enhanced Dedicated Physical Data CHannel
  • ⁇ I ⁇ is set in a 2ms Transmission Time Interval (TTI).
  • TTI Transmission Time Interval
  • the modulation method of E-DPDCH is Binary Phase Shift Keying (BPSK).
  • BPSK Binary Phase Shift Keying
  • the power of the E-DPDCH in the TTI can be different in each time slot, for example using 1500 Hz fast power control, and the control granularity of the ldB is used for each control.
  • the modulation mode of E-DPDCH in a certain 2ms TTI is 4PAM (I/Q multiplexing is equivalent to 16QAM).
  • the power of E-DPDCH is kept as much as possible within 2ms. constant.
  • the advantage of keeping the power of the E-DPDCH unchanged is that the channel estimation of the base station (hereinafter referred to as Node B) in the non-pilot time domain of the DPCCH can make full use of the channel estimation in the pilot time domain of the next time slot, as shown in FIG. Show.
  • FIG. 6 For example, a schematic diagram of a transmitted signal is shown in FIG. 6.
  • FIG. 7 A schematic diagram of a signal received under real channel conditions is shown in FIG. 7, wherein a schematic diagram of the received I-channel signal is shown in FIG.
  • FIG. 9 A schematic diagram of the Q signal is shown in FIG. It can be seen from Figures 7 to 9 that a symbol misjudgment will occur at the receiving end.
  • the technical problem to be solved by the present invention is to provide an uplink power control apparatus and method for reducing crosstalk between I and Q signals in a high speed packet access evolution HSPA+ system, so that the HSPA+ system can better support 4PAM (I /Q multiplexing is equivalent to 16QAM) or higher order (eg 8PAM) modulation techniques and is compatible with and enhances existing High Speed Uplink Packet Access (HSUP A) technology.
  • 4PAM I /Q multiplexing is equivalent to 16QAM
  • 8PAM higher order modulation techniques and is compatible with and enhances existing High Speed Uplink Packet Access (HSUP A) technology.
  • the present invention provides an uplink power control method, which is applied to a high speed packet access evolution HSPA+ system, and the method includes:
  • the terminal reads the transmission time interval, that is, the modulation mode of the enhanced dedicated physical data channel E-DPDCH in the TTI;
  • the terminal selects a power control method according to a modulation mode of the enhanced dedicated physical data channel E-DPDCH, and if it is a binary phase shift keying BPSK modulation mode, then proceeds to step (3); if it is a 4-level pulse amplitude modulation 4PAM modulation mode or 8PAM modulation mode or higher order modulation mode, then go to step (4);
  • the terminal selects a power control algorithm according to the version status supported by itself, and if it supports 3GPP Release 7 or higher, then goes to step (4); otherwise, according to 3GIT Release
  • the method specified in the TS25.214 protocol of 99/5/6 performs transmission power control, after which the entire process ends;
  • the terminal maintains the transmission power of all uplink channels constant or the transmission power of some uplink channels is constant throughout the transmission time interval ⁇ of the enhanced dedicated physical data channel E-DPDCH.
  • the terminal reads the transmit power control command TP from the base station in the most recent time slots: the current transmit power of the uplink channel.
  • the transmit power control command TPC includes a dedicated physical control channel DPCCH transmitted from the base station or a transmit power control command TPC from a portion of the dedicated physical channel F-DPCH transmitted by the base station.
  • the value range of the transmit power control command TPC is a set ⁇ 0, 1 ⁇ , and the TPC selects a value from the set.
  • the terminal according to the transmit power control command TPC received in the latest time slots, the current transmit power and the maximum transmit power of the uplink channel, the minimum transmit power requirement, and the power control adjustment step.
  • Long relative power difference factor of the DPCCH channel; It is applied to the transmission power of the uplink channel in the next transmission time interval TTI, and then the transmission power is kept constant or the transmission power of part of the uplink channel is constant.
  • step (4) specifically includes:
  • the terminal calculates a combined transmit power control command TPC ⁇ according to the transmit power control command TPC read from the base station in the most recent time slots;
  • the terminal calculates the uplink channel transmission according to the current transmit power of the uplink channel, the power control adjustment step size ⁇ , the combined transmit power control command TP ⁇ , and the power difference factor of the uplink channel relative to the DPCCH channel.
  • the terminal checks whether the transmit power of the uplink channel is within a range of transmit power allowed by the respective channel, satisfying the respective minimum transmit power requirements and not exceeding the respective maximum transmit power; if the transmission allowed by the respective channel is exceeded a power range, the terminal UE adjusts a transmit power of the uplink channel to a transmit power range allowed by the respective channel;
  • the terminal checks whether the total transmit power of the uplink channel exceeds the maximum transmit power of the terminal UE; if it exceeds, adjusts the transmit power of the uplink channel, so that the total transmit power of the uplink channel does not exceed The maximum transmit power of the terminal.
  • the calculated combined transmit power control command ZP ⁇ is performed according to the following expression:
  • TPC rm okay TPCI + TPC2 + TPC3 +... + TPCn (Formula A)
  • TPC AdJ 2.TPC Dec - ⁇ (Expression C) where: TPCI, TPC2, 7PC3, arranged ⁇ are the transmission power control commands of the most recent nth time slot, respectively.
  • the modulation mode of the enhanced dedicated physical data channel E-DPDCH in the next transmission time interval TTI is 4PAM or 8PAM modulation mode or higher order modulation mode
  • the calculation is performed.
  • the combined transmit power control commands are based on the following expression:
  • TPC Adi TPCI + TPCI + ?? + TPCn-1 (Formula D)
  • the 1PC1 and the TPC2 7 ⁇ are respectively the transmit power control commands of the latest nth time slot.
  • the calculating the transmit power of the uplink channel is performed according to the following expression:
  • AdjP DPCCH ⁇ 0 0A ' A ' TPC ⁇ ⁇ P DPCCH (Form E)
  • COT is the current transmit power of the uplink channel DPCCH
  • is the power control adjustment step
  • Ther is the transmit power of the uplink channel other than the uplink channel DPCCH
  • a and A TO are the power difference factor of the uplink channel DPCCH and other types of uplink channel relative to the DPCCH channel except the uplink channel DPCCH, respectively.
  • the terminal adjusts a transmit power of the uplink channel, including a proportional linear adjustment.
  • the present invention further provides an uplink power control apparatus, which is applied to a high speed packet access evolution HSPA+ system, and includes:
  • Transmit power control command reading module used to read the transmit power control command from the base station in the most recent time slots
  • Upstream channel current transmit power reading module used to read the current transmit power of the terminal uplink channel
  • Enhanced dedicated physical data channel E-DPDCH modulation mode reading module used to read the modulation mode of the enhanced dedicated physical data channel E-DPDCH;
  • the terminal supports the third generation mobile communication partner project 3GPP version reading module: 3GPP version of the third generation mobile communication partner project used to read the terminal support;
  • Maximum transmit power, minimum transmit power requirement, power control adjustment step size and power difference factor reading module used to read the maximum transmit power, minimum transmit power requirement, power control adjustment step size and power difference of the relative DPCCH channel of the uplink channel factor;
  • the uplink channel transmit power calculation module is configured to: according to the read transmit power control command, the current transmit power and the maximum transmit power of the uplink channel, the minimum transmit power requirement, the power control adjustment step size, and the power difference of the relative DPCCH channel.
  • the uplink channel transmit power setting module is configured to check the transmit power of each uplink channel, and adjust the transmit power exceeding the transmit power range allowed by the respective channel to the transmit power range allowed by the respective channel;
  • the total transmit power of the uplink channel if the maximum transmit power of the terminal UE is exceeded, linearly adjusts the transmit power of each uplink channel.
  • the transmit power control command read by the transmit power control command reading module includes a dedicated physical control channel DPCCH transmitted from the base station or a partial dedicated physical channel F-DPCH transmitted from the base station.
  • the uplink channel transmit power calculation module calculates a combined transmit power control command rPC according to the following expression:
  • TPC rnm TPC1 + TPC2 + TPC3 + ...... + TPCn (Formula A)
  • TPC AdJ 2 * TPC Dec - l (Expression C) where the 7PC1, TPC2, TPC3, . . . TPCn are the transmission power control commands of the most recent nth time slot, respectively.
  • the uplink channel transmission power calculation module is The combined expression of the transmit power control command rpc dj is calculated as follows:
  • TPC Adj TPCl + TPC2 + ...... + TPCn - 1 (Formula D) wherein the ⁇ PC!, TPC2 TPC are the transmission power control commands of the most recent nth time slot, respectively.
  • the uplink channel transmit power calculation module calculates the transmit power of the uplink channel according to the following expression:
  • AdjP DP cH 10 ⁇ ⁇ P DP CH (E) ⁇ ⁇ 1 ) 2 ⁇ ⁇ ? w (Formula F )
  • _P flrcOT in equation E is the current transmit power of the uplink channel DPCCH
  • is the power control adjustment step
  • P oihe in equation F is the uplink channel
  • the transmit powers of the uplink channels other than the DPCCH, A and P othe are the power difference factors of the uplink channel DPCCH and other types of uplink channels relative to the DPCCH channel except the uplink channel DPCCH, respectively.
  • the HSPA+ system well supports the uplink 4PAM (16QAM) high-order modulation technology, and is fully compatible and further enhanced with the existing system, effectively reducing the relationship between the I-channel and the Q-channel signal.
  • Crosstalk which allows the HSPA+ system to achieve higher system throughput than the original BPSK-only HSUPA system and smoothly upgrade existing systems.
  • Figure 1 is a schematic diagram of the equivalent of I/Q multiplexed 4PAM to 16QAM;
  • FIG. 2 is a schematic diagram of a frame structure of an uplink DPCCH channel
  • FIG. 3 is a schematic diagram showing a frame structure of an 8-bit pilot and a 2-bit TPC for an uplink DPCCH channel
  • FIG. 4 is a schematic diagram showing a constant power transmission using both an uplink DPCCH channel and an E-DPDCH channel in an E-DPDCH;
  • 5 is a schematic diagram showing that the uplink DPCCH channel and the E-DPDCH channel adopt variable power transmission in the TTI of the E-DPDCH;
  • Figure ⁇ is a 4PAM signal constellation diagram of the E-DPDCH channel in transmitting I/Q multiplexing
  • FIG. 7 is a schematic diagram of a signal constellation of an E-DPDCH channel received by a base station Node B after the signal of FIG. 6 is sent;
  • FIG. 8 is a schematic diagram of an I-channel signal of the E-DPDCH channel received by the Node B when the E-DPDCH channel transmits the I/Q multiplexed 4PAM signal (has Q-channel crosstalk);
  • FIG. 9 is a schematic diagram of a Q-channel signal of an E-DPDCH channel received by a Node B when an E-DPDCH channel transmits an I/Q multiplexed 4PAM signal (having I-channel crosstalk);
  • Figure 10 is a schematic structural view of an embodiment of the apparatus of the present invention.
  • FIG. 11 is a schematic flow chart of an embodiment of a method of the present invention.
  • FIG. 12 is a schematic diagram of a flow calculation and adjustment process of an uplink channel in an embodiment of the method of the present invention. Preferred embodiment of the invention
  • the uplink physical layer E-DPDCH channel based on 3GPP Release 7 version (and subsequent versions) will increase the use of 4PAM (16QAM) or 8PAM (64QAM) high-order modulation techniques to keep the original BPSK modulation mode available for backward compatibility.
  • 4PAM (16QAM) or 8PAM (64QAM) high-order modulation techniques to keep the original BPSK modulation mode available for backward compatibility.
  • 3GPP has not determined what changes in uplink power control after using 4PAM (16QAM) high-order modulation technology or higher-order modulation (such as 8PAM modulation), and its physical layer specification has not yet been formed.
  • the HSPA+ system can better support 4PAM (I/Q multiplexing equivalent to 16QAM) modulation technology or higher order modulation (such as 8PAM modulation).
  • 4PAM I/Q multiplexing equivalent to 16QAM
  • 8PAM modulation such as 8PAM modulation
  • HSUPA High Speed Uplink Packet Access
  • the present invention proposes a power control device for E-DCH and method.
  • An uplink power control device is provided on the high speed packet access evolution HSPA+ system. As shown in FIG. 10, the device includes:
  • Transmit Power Control (TPC) Command Read Module Used to read the transmit power control commands from the base station in the most recent time slots.
  • the transmit power control command may be from a DPCCH channel transmitted by the base station, or may be from a Fractional Dedicated Physical CHannel (F-DPCH) channel transmitted by the base station.
  • F-DPCH Fractional Dedicated Physical CHannel
  • Upstream channel current transmit power reading module used to read the current transmit power of each uplink channel of the terminal.
  • the uplink channel may include, for example, a DPCCH, an E-DPDCH Enhanced Dedicated Physical Control CHannel (hereinafter referred to as E-DPCCH), and a Dedicated Physical Control CHannel (uplink) for HS-DSCH. Referred to as HS-DPCCH).
  • E-DPDCH channel modulation mode reading module The modulation mode used to read the E-DPDCH channel.
  • the terminal supports the 3GPP version read module: It is used to read the 3GPP version supported by the terminal.
  • Maximum transmit power, minimum transmit power requirement, power control adjustment step size and power difference factor reading module used to read the maximum transmit power, minimum transmit power requirement, power control adjustment step size and relative DPCCH channel power of each uplink channel Difference factor ⁇
  • the uplink channel transmit power calculation module is configured to calculate according to the read transmit power control command, the current transmit power and maximum transmit power of the uplink channel, the minimum transmit power requirement, the power control adjustment step size, and the power difference factor of the relative DPCCH channel. The transmit power of each upstream channel.
  • the uplink channel transmit power calculation module calculates the combined transmit power control command 2PC according to the following expression:
  • TPC Com TPC1 + TPC2 + TPC3 + ...... + TPCn (Formula A)
  • the uplink channel transmission power calculation module is expressed according to the following expression Calculate the combined transmit power control command TPC Mj :
  • TPC AdJ TPC1 + TPC2 + ... + TPCn - 1 (Formula D) wherein the 7PC1, TPC2 T Cn are the transmission power control commands of the most recent nth time slot, respectively.
  • the uplink channel transmit power calculation module calculates the transmit power of the uplink channel according to the following expression:
  • AdjP DPCCH 10 ⁇ ⁇ P DPCCH (Form E) Wherein, in the formula E, the current transmit power of the uplink channel DPCCH, ⁇ is the power control adjustment step; in the formula F, the transmit power of the uplink channel other than the uplink channel DPCCH, A and the uplink channel DPCCH and respectively The power difference factor of the other types of uplink channels other than the uplink channel DPCCH relative to the DPCCH channel.
  • Uplink channel transmit power setting module used to set the transmit power of each uplink channel. Checking the transmit power of each uplink channel, adjusting the transmit power exceeding the transmit power range allowed by the respective channel to the transmit power range allowed by the respective channel; checking the total transmit power of each uplink channel, if the maximum transmit power of the terminal UE is exceeded The transmit power of each uplink channel is linearly adjusted proportionally.
  • the present invention further provides an uplink power control method, which is applied to a high speed packet access evolution HSPA+ system, as shown in FIG. 11, and includes the following steps:
  • Step 1 The terminal UE reads the transmit power control command TP from the base station Node B in the most recent time slots (:, the current transmit power of the uplink channel and the modulation mode of the E-DPDCH channel in the next transmission time interval TTI.
  • the transmit power control command TPC may be from a DPCCH channel transmitted by the base station Node B, or may be an F-DPCH channel transmitted from the base station Node B. It is assumed that the transmission power control command of the first time slot is PC1, and the transmission power control command of the second time slot is similar, and the transmission power control command of the latest Nth time slot is 7PC3 ⁇ 4, and N is greater than zero. A positive integer.
  • the range of values for TPC1 and TPC2 ⁇ is the set ⁇ 0, 1 ⁇ , that is, if it is not "0", it is "1".
  • the uplink channels include DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH channels, and their corresponding transmit powers are respectively ⁇ . ⁇ 3 ⁇ 4 , P E DmcH , P E CCH and P HS — DPCCH . These power values are linear and the unit is mW. Their values range from zero to the maximum transmit power of the terminal UE. The maximum transmit power of the UE is usually 125mW (ie 21dBm) or 250mW (ie 24dBm), the same below.
  • the uplink channel may include other kinds of channels in addition to the DPCCH, E-DPDCH, E-DPCCH, and HS-DPCCH channels.
  • Step 2 The terminal UE selects a power control method according to a modulation mode of the E-DPDCH channel in the next transmission time interval TTI. If it is BPSK modulation mode, go to step 3. If it is 4PAM modulation mode or 8PAM modulation mode, go to step 4.
  • Step 3 The terminal UE selects a power control algorithm according to the version status supported by the UE. If you are supporting 3GPP Release 7 or higher, go to step 4. Otherwise, the transmit power control is performed in accordance with the method specified in the TS25.214 protocol of 3GPP Release 99/5/6, after which the entire process ends.
  • Step 4 The terminal UE receives the transmit power control command TPC received in the latest time slots, the current transmit power and maximum transmit power of the uplink channel, the minimum transmit power requirement, the power control adjustment step size, and the power difference factor of the relative DPCCH channel. These parameters are used to calculate and adjust the transmit power applied to the upstream channel within the next transmission time interval TTI.
  • the transmit power control command TPC is from ZPC1 and TPC2 TPCn in step 1.
  • the current transmit power of the uplink channel is from P DPCCH , P E _ DPDCH , P E - H and P HS - D in step 1.
  • Their corresponding maximum transmit powers are MaxP DPCCH , MaxP E _ DPDCH , MaxP E — DPCCH and McaP HS DPCCH . These power values are linear and the unit is mW. Their range is from zero to the maximum emission of the terminal UE.
  • MinP DPCCH MinP E DPDCH
  • MinP E DPCCH MinP E DPCCH
  • MinP HS DPCCH MinP DPCCH
  • the power control adjustment step size is ⁇
  • is a decibel value (dB)
  • dB decibel value
  • the power difference factors of the uplink channel DPCCH, E-DPDCH. E-DPCCH, and HS-DPCCH relative to the DPCCH channel are A, P ed , ⁇ ⁇ , 15 , respectively.
  • the factors are linear values, non-negative real numbers.
  • the flow of calculation and adjustment of the transmit power applied to the uplink channel in the next transmission time interval ⁇ is as shown in FIG. 12, and includes the following four sub-steps:
  • Sub-step 41 The terminal UE calculates a combined transmit power control command based on the transmit power control command TPC read from the base station Node B in the most recent time slots: TPC ⁇ .
  • Sub-step 42 The terminal UE according to the current transmit powers p DPCQi , p E _ DPDCH , and PHS - H of the uplink channel, the power control adjustment step size ⁇ , the combined transmit power control command 2 C , and the uplink channel relative DPCCH channel Power difference factor, calculate the uplink of the above uplink channel Shooting power.
  • Sub-step 43 The terminal UE checks whether the transmission power of the uplink channel is within the transmission power range allowed by the respective channel, and satisfies the respective minimum transmission power requirements and does not exceed the respective maximum transmission power. If the transmit power range allowed by the respective channel is exceeded, the UE adjusts the transmit power of the uplink channel to the transmit power range allowed by the respective channel.
  • Sub-step 44 The terminal UE checks whether the total transmission power of the uplink channel exceeds the maximum transmission power of the UE. If it is exceeded, the transmit power of the uplink channel is linearly adjusted proportionally so that the total transmit power of the uplink channel does not exceed the maximum transmit power of the UE.
  • Step 5 The terminal UE keeps the transmission power of all the uplink channels constant or the transmission power of some uplink channels constant during the transmission time interval of the entire E-DPDCH channel, after which the entire process ends.
  • the UE does not have an uplink DPDCH channel, and does not have a Physical Random Access CHannel (hereinafter referred to as PRACH) channel.
  • PRACH Physical Random Access CHannel
  • the terminal UE has the following uplink channels: DPCCH. E-DPDCH, E-DPCCH and HS-DPCCH channels. It is also assumed that the terminal UE supports 3GPP Release 7 or higher.
  • Step 101 The terminal UE reads the transmit power control command from the base station Node B in the last 3 time slots, the current transmit power of the uplink channel, and the modulation mode of the E-DPDCH channel in the next transmission time interval TTI.
  • the above transmit power control command TPC may be from a DPCCH channel transmitted by the base station Node B, or may be an F-DPCH channel transmitted from the base station Node B. It is assumed that the transmission power control command of the most recent first time slot is the transmission power control command of the latest second time slot, and the transmission power control command of the last third time slot is 7 C 3 . However, the range of values of 7PC3 and 7PC3 is set ⁇ 0, 1 ⁇ , that is, not "0" is "1".
  • E-DPCCH and HS-DPCCH channels are respectively ⁇ eOT , P E DPDCH , E DPCCH P HS D .
  • the power values are linear and the unit is mW. Their values range from zero to the maximum transmit power of the UE. The largest transmission of the UE The shooting power is usually 125mW (ie 21dBm) or 250mW (ie 24dBm:), the same below.
  • the modulation mode of the E-DFDCH channel in the next TTI is BPSK, 4PAM or higher order modulation (such as 8PAM modulation).
  • Step 102 The terminal UE selects a power control method according to a modulation mode of the E-DPDCH channel in the next transmission time interval. If it is the BPSK modulation mode, go to step 103 to execute. Otherwise go to step 104 to execute.
  • Step 103 Since the terminal UE supports 3GPP Release 7 or higher, the flow proceeds to step 104.
  • Step 104 The terminal UE according to the transmit power control command received in the last 3 time slots, the current transmit power and maximum transmit power of the uplink channel, the minimum transmit power requirement, the power control adjustment step size, and the power difference factor of the relative DPCCH channel.
  • the transmit power applied to the uplink channel in the next transmission time interval TTI is calculated and adjusted.
  • the above transmit power control command TPC comes from JTC1, 7PC2 and TPC3 in step 101.
  • the current transmit powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH are from P DPCOT , P E — DPDCH , P E — DPCCH and P HS — DPCCH in step 101 .
  • the maximum transmit powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH, and HS-DPCCH are MaxP DPCCH , MaxP E — DPDCH , MaxP E DPCCH ⁇ MaxP HS DPCCH 0, respectively. These power values are linear, and the unit is mW. Their values range from zero to the maximum transmit power of the terminal UE.
  • the minimum transmit powers of the above uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH are ⁇ eai , MinP ED , MinP E - D and MinP HS - DPCCH, respectively . These power values are linear and the unit is mW. Their values range from zero to the maximum transmit power of the terminal UE.
  • the above power control adjustment step is ⁇ , ⁇ is decibel value (dB), logarithmic domain, the same below.
  • the power difference factors of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH relative to the DPCCH channel are respectively, ⁇ , ⁇ ⁇ , and these factors are linear values, non-negative real numbers.
  • Sub-step 1041 The terminal UE calculates the combined transmit power control command rPC ⁇ according to the TPC1. and: TPC3 read from the base station Node B in the last 3 slots. The method is as shown in the following Formula 1, Formula 2 and Formula 3.
  • TPC rm okay TPCI + TPC2 + TPC3 (Formula 1)
  • Sub-step 1042 The terminal UE calculates the transmission powers of the above-mentioned uplink channels DPCCH, E-DPDCH, E-DPCCH, and HS-DPCCH. The method is as shown in the following Formula 4, Formula 5, Formula 6, and Formula 7.
  • AdjP DPCCH (Formula 5)
  • Equation 7 DPCCH ⁇ ⁇ ⁇ .
  • Equation 7 AdjP DPCCH (Equation 7) where Equation 5, Equation 6, and Equation 7 can be summarized as follows:
  • P The, 'two ( " ⁇ n ⁇ ) ⁇ AdjP DpcCH (Equation 8) where P is the transmission power of each uplink channel except the DPCCH channel; A and ⁇ are the uplink channel DPCCH and other kinds of uplink channels, respectively.
  • the power difference factor of the relative DPCCH channel for example, the power difference factor of the uplink channel E-DPDCH relative to the DPCCH channel in Equation 5; the power difference factor of the uplink channel E-DPCCH relative to the DPCCH channel in Equation 6; ⁇ , ' in Equation 7 It is the power difference factor of the uplink channel HS-DPCCH relative to the DPCCH channel.
  • the current transmit powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH are from ⁇ caf , P E PDCH , P E - DPCCH and P HS - DPCCH in step 101.
  • Sub-step 1043 The terminal UE checks the uplink channels DPCCH, E-DPDCH, E-DPCCH And whether the transmit power of the HS-DPCCH is within the allowed transmit power range of the respective channel, satisfying the respective minimum transmit power requirements and not exceeding the respective maximum transmit power. If the transmit power range allowed by the respective channel is exceeded, the UE adjusts the transmit powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH, and HS-DPCCH to the transmit power range allowed for the respective channel.
  • Sub-step 1044 The terminal UE checks whether the total transmission power of the uplink channels DPCCH, E-DPDCH, E-DPCCH, and HS-OPCCH exceeds the maximum transmission power of the UE. If it is exceeded, the transmission powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH are linearly adjusted in proportion, so that the total transmission powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH are not The maximum transmit power of the UE is exceeded.
  • Step 105 The terminal UE keeps the transmission power of the uplink channels DPCCH, E-DPDCH, E-DPCCH, and HS-DPCCH constant throughout the transmission time interval of the E-DPDCH channel. Then the entire process ends.
  • This embodiment assumes that the UE does not have an uplink DPDCH channel and does not have a Physical Random Access Channel (PRACH) channel.
  • PRACH Physical Random Access Channel
  • the UE has the following uplink channels: DPCCH, E-DPDCH, E-DPCCH, and Dedicated Physical Control Channel (uplink) for HS-DSCH; HS-DPCCH.
  • the modulation mode of the E-DPDCH channel in the next transmission time interval TTI is 4PAM (I/Q multiplexing is equivalent to 16QAM).
  • Step 201 The terminal reads the transmit power control command from the base station: ode B in the last two time slots, the current transmit power of the uplink channel, and the modulation mode of the E-DPDCH channel in the next transmission time interval TTI.
  • the above transmit power control command TPC may be from a DPCCH channel transmitted by the base station Node B, or may be a partial dedicated physical F-DPCH channel transmitted from the base station Node B. It is assumed that the transmission power control command of the first time slot is JPC1, and the transmission power control command TPCI of the second time slot is the most recent. :
  • the range of values for TPC1 and ⁇ is the set ⁇ 0, 1 ⁇ , that is, not "0" or "1".
  • the current transmit powers of the above DPCCH, E-DPDCH, E-DPCCH, and HS-DPCCH channels are P OTCOT , P E DCH P E _ DPCCH , and P HS — respectively. These power values are linear and the unit is mW. Their values range from zero to the maximum transmit power of the UE.
  • the maximum transmit power of the UE is usually 125mW (ie 21dBm) or 250mW (ie 24dBm), the same below.
  • the modulation mode of the E-DPDCH channel in the next TTI is
  • 4PAM modulation mode or higher order modulation mode such as 8PAM modulation mode.
  • Step 202 The terminal selects a power control method according to a modulation mode of the E-DPDCH channel in the next transmission time interval. Since the modulation method is 4PAM or 8PAM modulation, go to step 204.
  • Step 203 Blank.
  • Step 204 The terminal calculates, according to the transmit power control command received in the last two time slots, the current transmit power and the maximum transmit power of the uplink channel, the minimum transmit power requirement, the power control adjustment step size, and the power difference factor of the relative DPCCH channel. And adjusting the transmit power applied to the uplink channel in the next TTI.
  • the above transmit power control command is from TPC1 and TPC2 in step 201.
  • the current transmit powers of the above uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH are from P D , P E DPDCH , DPCCH and DPCCH ° of step 201
  • the maximum transmit powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH are respectively MaxP ED MaxP E DPCCH and MaxP HS — DPCCH These power values are linear and the unit is mW. Their values range from zero to the maximum transmit power of the UE.
  • the minimum transmit powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH, and HS-DPCCH are MinP DPCCH , MinP E DFDCH , MinP E DPCCH, and MinP HS DPCCH , respectively , and the power values are linear, and the unit is mW. Their values range from zero to the maximum transmit power of the UE.
  • the above power control adjustment step is ⁇ , and the unit of ⁇ is decibel value (dB), logarithmic domain, the same below.
  • the power difference factors of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH with respect to the DPCCH channel are respectively A, P ed ⁇ ⁇ These factors are linear values, non-negative real numbers.
  • the above calculation and adjustment of the transmission power applied to the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH in the next TTI are as shown in the following four sub-steps.
  • Sub-step 2041 The terminal UE calculates the combined transmit power control command TPC ⁇ based on TPC1 and: T C2 read from the base station Node B in the last 2 slots.
  • the method is as shown in the following formula 9.
  • TPC Adj TPCl + TPC2 - 1 (Equation 9)
  • Sub-step 2042 The terminal UE calculates the transmission power of the above-mentioned uplink channels DPCCI ⁇ E-DPDCH E-DPCCH and HS-DPCCH. The method is as shown in Formula 4, Formula 5, Formula 6, and Formula 7 in the first embodiment above.
  • Sub-step 2043 The terminal UE checks whether the transmit powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH are within the allowed transmit power range of the respective channels, satisfying the respective minimum transmit power requirements, and not exceeding the respective Maximum transmit power. If the transmission power range allowed by the respective channels is exceeded, the UE adjusts the transmission powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH, and HS-DPCCH to the transmission power ranges allowed for the respective channels.
  • Sub-step 2044 The terminal UE checks whether the total transmission power of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH exceeds the maximum transmission power of the UE. If it is exceeded, the transmit powers of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH are linearly adjusted in proportion, so that the total transmit power of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH is not The maximum transmit power of the UE is exceeded.
  • Step 205 The terminal UE keeps the transmission power of the uplink channels DPCCH, E-DPDCH, E-DPCCH and HS-DPCCH constant throughout the transmission time interval of the E-DPDCH channel. Then the entire process ends.
  • WCDMA Power control techniques in mobile communication systems, especially power steering for enhanced dedicated channels (E-DCH) in High Speed Packet Access Evolution (HSPA+) systems.
  • the invention can reduce the crosstalk between the I channel and the Q channel signal, so that the HSPA+ system can better support the 4PAM (I/Q multiplexing or equivalent to 16QAM) modulation technology or a higher order modulation method (such as the 8PAM modulation method).
  • 4PAM I/Q multiplexing or equivalent to 16QAM
  • 8PAM modulation method such as the 8PAM modulation method
  • HSUPA High Speed Uplink Packet Access

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Description

一种上行功率控制装置与方法
技术领域
本发明涉及一种宽带码分多址 (Wideband Code Division Multiple Access, 简称 WCDMA )移动通信系统中的功率控制技术, 尤其涉及高速分 组接入演进 ( High Speed Packet Access Evolution, 以下筒称 HSPA+ ) 系统 中增强专用信道( Enhanced Dedicated CHannel , 以下筒称 E-DCH ) 的功率 控制装置及方法。 背景技术
根据第三代移动通信合作伙伴项目 ( 3rd Generation Partnership Project, 以下简称 3GPP )的 RP-060844 ( "Proposed W1D for Higher Order Modulation in HSUPA" )提案, 高速分组接入演进 HSPA+即将在 E-DCH数据信道上增 加 16阶的正交幅度调制 (以下简称 16QAM )这种新的高阶调制方式。
如图 1所示,根据 3GPP的 Rl-070590 ( "DRAFT Introduction of 16QAM for HSUPA" )提案, 16QAM将以同相 (即 I路)的 4电平脉冲幅度调制 ( 4 Pulse-Amplitude Modulation, 以下筒称 4PAM )和正交相 (即 Q路) 的 4PAM成对复用的方式来等效地实现 16QAM。
如图 2所示, 根据 3GPP TS 25.211 V7.0.0的 5.2.1.1节, 终端 (以下筒 称 UE )需要指定专用物理控制信道( Dedicated Physical Control CHannel, 以下简称 DPCCH )的专用导频( Pilot )、传输格式组合指示( Transport Format Combination Indicator, 以下简称 TFCI )、发射分集权值反馈信息( Feed Back Information, 以下简称 FBI ) 、 发射功率控制命令( Transmit Power Control, 以下简称 TPC ) 的比特数。
如图 3所示, UE即终端在使用 E-DCH、 没有并发的专用物理数据信道
( Dedicated Physical Data CHannel ,以下筒称 DPDCH )且没有 FBI时, DPCCH 将使用 "8个 Pilot比特 + 2个 TPC比特" 的发射方式 (下面的描述如果没 有特别注明, 都是指使用 "8个 Pilot比特 + 2个 TPC比特" 的发射模式)。 根据 3GPP TS 25.214 V7.3.0的 5.1.2节, UE将对上行 DPCCH的发射功 率进行功率控制, 例如每个时隙都执行的 1500Hz功率控制方法和 5个时隙 合并的 300Hz功率控制方法。 根据 3GPP TS 25.214 V73.0的 5.1.2.5B.2节, UE将对增强专用物理数据信道( Enhanced Dedicated Physical Data CHannel, 以下简称 E-DPDCH ) 的发射功率进行功率控制, 其方法是设置 E-DPDCH 相对 DPCCH的功率差。
■I叚设在某个 2ms的传输时间间隔( Transmission Time Interval,以下简称 TTI )内 E-DPDCH的调制方式是二进制相移键控( Binary Phase Shift Keying, 以下简称 BPSK ) , 那么, 在 2ms的 TTI内 E-DPDCH的功率可以在每个时 隙不同,例如使用 1500Hz的快速功率控制,每次控制使用 ldB的控制粒度。
假设在某个 2ms的 TTI内 E-DPDCH的调制方式是 4PAM ( I/Q复用即 等效为 16QAM ) , 为使接收数据可靠, 那么, 在 2ms的 ΤΉ内 E-DPDCH 的功率尽可能保持不变。 保持 E-DPDCH的功率不变的好处是, 基站 (以下 简称 Node B )在 DPCCH的非导频域时间内的信道估计可以充分利用下一时 隙导频域时间内的信道估计, 如图 4所示。
相反, 如果在 E-DPDCH发射 4PAM ( I/Q复用即等效为 16QAM )数据 时, 在 2ms的 TTI内各个时隙的发射功率是变化的 (上调或下调一个功控 阶) , 那么 TPC时间内的信道估计容易发生错误, 整个 ΤΉ内的信道估计 也不一致, 如图 5所示。
在真实的信道条件下, 由于多径、 多普勒频移、 其他无线发射设备的干 扰等原因, 原来在 UE发出的相互正交的 I路和 Q路信号在 Node B接收端 将不再相互正交而有一定串扰。
例如假定发射信号的示意图如图 6所示,则在真实的信道条件下接收到 的信号的示意图如图 7所示,其中,接收到的 I路信号的示意图如图 8所示, 接收到的 Q路信号的示意图如图 9所示。 由图 7至 9可看到, 接收端会出 现符号误判情况。 发明内容 本发明所要解决的技术问题是提供一种上行功率控制装置与方法,为高 速分组接入演进 HSPA+系统中减少 I路和 Q路信号之间的串扰, 使 HSPA+ 系统能更好地支持 4PAM( I/Q复用即等效为 16QAM )或更高阶(例如 8PAM ) 的调制技术并且兼容和增强现有的高速上行分组接入(High Speed Uplink Packet Access , 以下筒称 HSUP A )技术。
为了解决上述技术问题, 本发明提供一种上行功率控制方法,应用在高 速分组接入演进 HSPA+系统上, 所述方法包括:
( 1 )终端读取传输时间间隔即 TTI内增强专用物理数据信道 E-DPDCH 的调制方式;
( 2 ) 所述终端根据增强专用物理数据信道 E-DPDCH的调制方式选择 功率控制方法, 如果是二进制相移键控 BPSK调制方式, 则转到步骤(3 ) ; 如果是 4电平脉冲幅度调制 4PAM调制方式或 8PAM调制方式或更高阶调 制方式, 则转到步骤(4 ) ;
( 3 ) 所述终端根据自身支持的版本状况来选择功率控制算法, 如果是 支持 3GPP Release 7或更高版本, 则转到步骤(4 ) ; 否则按照 3GIT Release
99/5/6的 TS25.214协议规定的方法进行发射功率控制 , 之后整个流程结束;
( 4 ) 所述终端保持在整个增强专用物理数据信道 E-DPDCH的传输时 间间隔 ΤΉ 内所有上行信道的发射功率恒定不变或部分上行信道的发射功 率恒定不变。
进一步地, 所述步骤 (1 ) 中, 所述终端读取最近若干个时隙内来自基 站的发射功率控制命令 TP:、上行信道当前的发射功率。所述发射功率控制 命令 TPC, 包括来自所述基站发射的专用物理控制信道 DPCCH或来自所述 基站发射的部分专用物理信道 F-DPCH的发射功率控制命令 TPC。所述步骤 ( 1 ) 中, 所述发射功率控制命令 TPC的取值范围是集合 {0, 1} , 所述 TPC 从所述集合中择一取值。
进一步地, 所述步骤 (4 ) 中, 所述终端根据最近若干个时隙内收到的 发射功率控制命令 TPC、上行信道当前的发射功率和最大发射功率、最小发 射功率要求、 功率控制调整步长、 相对 DPCCH信道的功率差因子; 来计 算应用于下一个传输时间间隔 TTI内上行信道的发射功率,然后保持发射功 率恒定不变或部分上行信道的发射功率恒定不变。
进一步地, 所述步骤(4)具体包括:
( 41 )所述终端根据所述最近若干个时隙内从所述基站读取到的所述发 射功率控制命令 TPC来计算合并的发射功率控制命令 TPC^;
(42)所述终端根据所述上行信道当前的发射功率、 功率控制调整步长 Δ、合并的发射功率控制命令 TP ^,以及上行信道相对 DPCCH信道的功率 差因子 ?, 计算上述上行信道的发射功率;
( 43 )所述终端检查所述上行信道的发射功率是否在各自信道允许的发 射功率范围之内, 既满足各自最小发射功率要求, 又不超出各自的最大发射 功率; 如果超出各自信道允许的发射功率范围, 则所述终端 UE将所述上行 信道的发射功率调整到各自信道允许的发射功率范围内;
( 44 )所述终端检查所述述上行信道的总的发射功率是否超出所述终端 UE的最大发射功率; 如果超出则调整所述上行信道的发射功率, 使得上行 信道总的发射功率不超出所述终端的最大发射功率。
进一步地, 所述步骤(41) 中, 若所述终端支持 3GPP Release 7或其更 高版本, 则计算合并的发射功率控制命令 ZP ^根据如下表达式进行:
TPCrm„ = TPCI + TPC2 + TPC3 +…… + TPCn (式 A )
Γθ, if TPCCom <2 Jr- Ό
TPCDec = 11 Com (式 B)
TPCAdJ =2.TPCDec-\ (式 C) 其中, 所述: TPCI、 TPC2, 7PC3、 ..... ΓΡΟι分别为最近第 n个时隙的发 射功率控制命令。
进一步地, 所述步骤(41) 中, 若所述终端在下一个传输时间间隔 TTI 内所述增强专用物理数据信道 E-DPDCH的调制方式为 4PAM或 8PAM调制 方式或更高阶调制方式, 则计算合并的发射功率控制命令 根据如下表 达式进行:
TPC Adi = TPCI + TPCI + ...... + TPCn一 1 (式 D) 其中, 所述所述 1PC1、 TPC2 7ΡΟι分别为最近第 n个时隙的发射功 率控制命令。
进一步地, 所述步骤(42 )中, 所述计算上述上行信道的发射功率, 根 据如下表达式进行:
AdjPDPCCH = \00A'A'TPC ^ · PDPCCH (式 E )
P (式 F )
Figure imgf000007_0001
其中式 E中 ^COT为上行信道 DPCCH当前的发射功率, Δ为功率控制 调整步长; 式 F中的 P。ther为除上行信道 DPCCH之外的其他上行信道的发射 功率, A和 ATO分别为上行信道 DPCCH及除该上行信道 DPCCH之外的其 他种类上行信道相对 DPCCH信道的功率差因子。
进一步地,所述步骤(44 )中,所述终端调整所述上行信道的发射功率, 包括按比例线性调整。
本发明还提供一种上行功率控制装置, 应用在高速分组接入演进 HSPA+系统上, 包括:
发射功率控制命令读取模块:用来读取最近若干个时隙内来自基站的发 射功率控制命令;
上行信道当前发射功率读取模块:用来读取终端上行信道当前的发射功 率;
增强专用物理数据信道 E-DPDCH调制方式读取模块: 用来读取增强专 用物理数据信道 E-DPDCH的调制方式;
终端支持笫三代移动通信合作伙伴项目 3GPP版本读取模块: 用来读取 终端支持的第三代移动通信合作伙伴项目 3GPP版本;
最大发射功率、最小发射功率要求、功率控制调整步长和功率差因子读 取模块: 用来读取上行信道的最大发射功率、 最小发射功率要求、 功率控制 调整步长和相对 DPCCH信道的功率差因子 ; 上行信道发射功率计算模块: 用来根据读取到的发射功率控制命令、上 行信道当前的发射功率和最大发射功率、最小发射功率要求、功率控制调整 步长、 相对 DPCCH信道的功率差因予 来计算各个上行信道的发射功率; 上行信道发射功率设置模块: 用来检查各个上行信道的发射功率,对超 出各自信道允许的发射功率范围的发射功率调整到各自信道允许的发射功 率范围内; 检查各个上行信道的总的发射功率, 若超出终端 UE的最大发射 功率则按比例线性调整各个上行信道的发射功率。
进一步地,所述发射功率控制命令读取模块读取的所述发射功率控制命 令包括来自所述基站发射的专用物理控制信道 DPCCH或来自所述基站发射 的部分专用物理信道 F-DPCH。
进一步地, 若所述终端支持 3GPP Release 7或其更高版本, 所述上行信 道发射功率计算模块,根据如下表达式计算合并的发射功率控制命令 rPC :
TPCrnm = TPC1 + TPC2 + TPC3 + ...... + TPCn (式 A )
Γθ, if TPCCom < 2 , jt D、 PCDec = \ Co'" (式 B )
1. else
TPCAdJ = 2 * TPCDec - l (式 C ) 其中, 所述 7PC1、 TPC2、 TPC3、 . .... TPCn分别为最近第 n个时隙的发 射功率控制命令。
进一步地,若所迷终端在下一个传输时间间隔 TTI内所述增强专用物理 数据信道 E-DPDCH的调制方式为 4PAM或 8PAM调制方式或更高阶调制方 式, 所述上行信道发射功率计算模块,根据如下表达式计算合并的发射功率 控制命令 rpc dj :
TPCAdj = TPCl + TPC2 + ...... + TPCn - 1 (式 D ) 其中, 所述所述∑PC!、 TPC2 TPC分别为最近第 n个时隙的发射功 率控制命令。
进一步地,所述上行信道发射功率计算模块, 根据如下表达式计算上行 信道的发射功率:
AdjP DP cH = 10 Α · PDP CH (式 E ) Κ ^1)2 ·局? w (式 F ) 其中, 式 E中 _PflrcOT为上行信道 DPCCH当前的发射功率, Δ为功率控 制调整步长; 式 F中的 Poihe,.为除上行信道 DPCCH之外的其他上行信道的发 射功率, A和 Pothe,.分别为上行信道 DPCCH及除该上行信道 DPCCH之外的 其他种类上行信道相对 DPCCH信道的功率差因子。
采用本发明所述的装置和方法, HSPA+系统很好地支持上行 4PAM ( 16QAM ) 高阶调制技术, 并与现有系统完全兼容和进一步增强, 有效地 减少了 I路和 Q路信号之间的串扰, 从而使得 HSPA+系统获得比原来只有 BPSK的 HSUPA系统获得更高的系统吞吐率并可平滑地升级现有系统。 附图概述
图 1是将 I/Q复用的 4PAM等效成 16QAM的示意图;
图 2是上行 DPCCH信道的帧结构示意图;
图 3是上行 DPCCH信道使用 8比特导频和 2比特 TPC的帧结构示意图; 图 4是上行 DPCCH信道和 E-DPDCH信道在 E-DPDCH的 ΤΉ内都使 用恒定功率发射的示意图;
图 5是上行 DPCCH信道和 E-DPDCH信道在 E-DPDCH的 TTI内都采 用可变功率发射的示意图;
图 ό是 E-DPDCH信道在发射 I/Q复用的 4PAM信号星座图;
图 7是图 6信号发出后基站 Node B收到的 E-DPDCH信道的信号星座 示意图;
图 8是在 E-DPDCH信道在发射 I/Q复用的 4PAM信号时, Node B收到 的 E-DPDCH信道的 I路信号示意图 (有 Q路串扰) ;
图 9是在 E-DPDCH信道在发射 I/Q复用的 4PAM信号时, Node B收到 的 E-DPDCH信道的 Q路信号示意图 (有 I路串扰) ; 图 10是本发明装置实施例结构示意图;
图 11是本发明方法实施例流程示意图;
图 12 是本发明方法实施例中上行信道发射功率计算和调整流程示意 图。 本发明的较佳实施方式
基于 3GPP Release 7版本(及后续版本) 的上行物理层 E-DPDCH信道 将增加使用 4PAM ( 16QAM )或 8PAM ( 64QAM ) 高阶调制技术, 为保持 向下兼容而保持原有的 BPSK调制方式继续可用, 但目前 3GPP还没有确定 使用 4PAM ( 16QAM ) 高阶调制技术或更高阶的调制方式(如 8PAM调制 方式)后上行功率控制该故什么变化, 其物理层规范尚未最终形成。
为减少 I路和 Q路信号之间的串扰,使 HSPA+系统能更好地支持 4PAM ( I/Q复用即等效为 16QAM )调制技术或更高阶的调制方式(如 8PAM调 制方式)并且兼容和增强现有的高速上行分组接入( High Speed Uplink Packet Access, 以下简称 HSUPA )技术(即使用 E-DCH的增强上行技术) , 本发 明提出了一种针对 E-DCH的功率控制装置与方法。
下面结合附图和具体实施例对本发明作进一步的详细说明。
本发明提出的一种上行功率控制装置, 应用在高速分组接入演进 HSPA+系统上, 如图 10所示, 所述装置包括:
发射功率控制 ( TPC )命令读取模块: 用来读取最近若干个时隙内来自 基站的发射功率控制命令。 发射功率控制命令可以来自基站发射的 DPCCH 信道, 也可来自基站发射的部分专用物理信道 ( Fractional Dedicated Physical CHannel; F-DPCH )信道。
上行信道当前发射功率读取模块:用来读取终端各个上行信道当前的发 射功率。 其中的上行信道比如可以包括 DPCCH、 E-DPDCH 增强专用物理 控制信道 ( Enhanced Dedicated Physical Control CHannel, 以下简称 E-DPCCH )和高速专用控制物理信道 (Dedicated Physical Control CHannel (uplink) for HS-DSCH, 以下简称 HS-DPCCH )等。 E-DPDCH信道调制方式读取模块: 用来读取 E-DPDCH信道的调制方 式。
终端支持 3GPP版本读取模块: 用来读取终端支持的 3GPP版本。
最大发射功率、最小发射功率要求、功率控制调整步长和功率差因子读 取模块: 用来读取各个上行信道的最大发射功率、 最小发射功率要求、 功率 控制调整步长和相对 DPCCH信道的功率差因子^
上行信道发射功率计算模块: 用来根据读取到的发射功率控制命令、上 行信道当前的发射功率和最大发射功率、最小发射功率要求、功率控制调整 步长、 相对 DPCCH信道的功率差因子 来计算各个上行信道的发射功率。
若所迷终端支持 3GPP Release 7或其更高版本,所述上行信道发射功率 计算模块, 根据如下表达式计算合并的发射功率控制命令 2PC :
TPCCom = TPC1 + TPC2 + TPC3 + ...... + TPCn (式 A )
TPCD °; TPC-'<2 (式 B )
1, else
(式 c ) 其中, 所述 TPC1、 TJPC2、 TPC3 Γ Οι分别为最近第 n个时隙的发 射功率控制命令。 '
若所述终端在下一个传输时间间隔 TTI 内所述增强专用物理数据信道 E-DPDCH的调制方式为 4PAM或 8PAM调制方式或更高阶调制方式, 所述 上行信道发射功率计算模块,根据如下表达式计算合并的发射功率控制命令 TPCMj
TPCAdJ = TPC1 + TPC2 + ...... + TPCn - 1 (式 D ) 其中, 所述所迷 7PC1、 TPC2 T Cn分别为最近第 n个时隙的发射功 率控制命令。
所述上行信道发射功率计算模块, 根据如下表达式计算上行信道的发 射功率:
AdjP DPCCH = 10 } · P DPCCH (式 E ) 其中, 式 E中 为上行信道 DPCCH当前的发射功率, Δ为功率控 制调整步长; 式 F中的 为除上行信道 DPCCH之外的其他上行信道的发 射功率, A和 分别为上行信道 DPCCH及除该上行信道 DPCCH之外的 其他种类上行信道相对 DPCCH信道的功率差因子。
上行信道发射功率设置模块: 用来设置各个上行信道的发射功率。检查 各个上行信道的发射功率,对超出各自信道允许的发射功率范围的发射功率 调整到各自信道允许的发射功率范围内; 检查各个上行信道的总的发射功 率, 若超出终端 UE的最大发射功率则按比例线性调整各个上行信道的发射 功率。
本发明进而提出了一种上行功率控制方法, 应用在高速分组接入演进 HSPA+系统上, 如图 11所示, 包括如下步骤:
步骤 1:终端 UE读取最近若干个时隙内来自基站 Node B的发射功率控 制命令 TP (:、 上行信道当前的发射功率和下一个传输时间间隔 TTI 内 E-DPDCH信道的调制方式。
其中发射功率控制命令 TPC可以来自基站 Node B发射的 DPCCH信道, 也可以是来自基站 Node B发射的 F-DPCH信道。 假定最近第 1个时隙的发 射功率控制命令为 PC1 , 最近第 2个时隙的发射功率控制命令为 以 此类推, 最近第 N个时隙的发射功率控制命令为 7PC¾ , N为大于零的正整 数。 TPC1、 TPC2 ΤΡΟ的取值范围都是集合 {0, 1} , 即, 不是 "0" 就 是 "1" 。
其中的上行信道包括 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH信 道, 他们对应的发射功率分别为 Ρ。ρα¾、 PE DmcH、 PE CCH和 PHSDPCCH。 这些 功率值都是线性的, 单位是 mW。 他们的取值范围在零到终端 UE的最大发 射功率之间。 UE的最大发射功率通常是 125mW (即 21dBm )或者 250mW (即 24dBm ) , 下同。 当然, 其中的上行信道除了包括 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH信道之外, 还可以包括其他种类的信道。 步骤 2: 终端 UE根据下一个传输时间间隔 TTI内 E-DPDCH信道的调 制方式选择功率控制方法。 如果是 BPSK调制方式, 则转到步骤 3执行。 如 果是 4PAM调制方式或 8PAM调制方式, 则转到步驟 4执行。
步骤 3: 终端 UE根据自身支持的版本状况来选择功率控制算法。 如果 是支持 3GPP Release 7或更高版本, 则转到步骤 4。 否则按照 3 GPP Release 99/5/6的 TS25.214协议规定的方法进行发射功率控制, 之后整个流程结束。
步驟 4:终端 UE根据最近若干个时隙内收到的发射功率控制命令 TPC、 上行信道当前的发射功率和最大发射功率、最小发射功率要求、功率控制调 整步长、 相对 DPCCH信道的功率差因子 利用这些参数来计算和调整应 用于下一传输时间间隔 TTI内上行信道的发射功率。
其中,发射功率控制命令 TPC来自步骤 1中的 ZPC1、 TPC2 TPCn。 其中,上行信道当前的发射功率来自步驟 1中的 PDPCCH、 PE_DPDCH、 PE―建 H 和 PHSD讓。 他们对应的最大发射功率分别为 MaxPDPCCH、 MaxPE_DPDCH、 MaxPEDPCCH和 McaPHS DPCCH , 这些功率值都是线性的, 单位是 mW, 他们的取 值范围在零到终端 UE的最大发射功率之间; 他们对应的最小发射功率分别 为 MinPDPCCH、 MinPE DPDCH、 MinPE DPCCH和 MinPHS DPCCH, 这些功率值也都是线性 的, 单位是 mW, 他们的取值范围也在零到终端 UE的最大发射功率之间。
其中, 功率控制调整步长为 Δ, Δ为分贝值(dB ) , 对数域, 下同。 其中, 上行信道 DPCCH、 E-DPDCH. E-DPCCH和 HS-DPCCH相对 DPCCH信道的功率差因子 分别为 A、 Ped 、 β β,15 , 这些?因子都是线 性值, 非负的实数。
其中应用于下一传输时间间隔 ΤΤΙ 内上行信道的发射功率计算和调整 的流程如图 12所示, 包括下面的 4个子步骤:
子步骤 41: 终端 UE根据最近若干个时隙内从基站 Node B读取到的发 射功率控制命令 TPC来计算合并的发射功率控制命令: TPC^.。
子步骤 42:终端 UE根据上述上行信道当前的发射功率 pDPCQi、 pE_DPDCH、 和 PHS一 H , 功率控制调整步长 Δ , 合并的发射功率控制命令 2 C , 以及各上行信道相对 DPCCH信道的功率差因子 , 计算上述上行信道的发 射功率。
子步骤 43:终端 UE检查上述上行信道的发射功率是否在各自信道允许 的发射功率范围之内, 既满足各自最小发射功率要求, 又不超出各自的最大 发射功率。 如果超出各自信道允许的发射功率范围, 则 UE将上迷上行信道 的发射功率调整到各自信道允许的发射功率范围内。
子步驟 44: 终端 UE检查上述上行信道的总的发射功率是否超出 UE的 最大发射功率。 如果超出, 则按比例线性调整上述上行信道的发射功率, 使 得上行信道总的发射功率不超出 UE的最大发射功率。
步骤 5: 终端 UE保持在整个 E-DPDCH信道的传输时间间隔 ΤΉ内所 有上行信道的发射功率恒定不变或部分上行信道的发射功率恒定不变,之后 整个流程结束。
第一应用实施例
本实施例 定 UE没有上行 DPDCH信道, 也没有随机接入物理信道 ( Physical Random Access CHannel, 以下简称 PRACH )信道。 本实施例假 定终端 UE有下列上行信道: DPCCH. E-DPDCH, E-DPCCH和 HS-DPCCH 信道。 还假定终端 UE支持 3GPP Release 7或其更高版本。
步骤 101:终端 UE读取最近 3个时隙内来自基站 Node B的发射功率控 制命令、 上行信道当前的发射功率和下一个传输时间间隔 TTI内 E-DPDCH 信道的调制方式。
上述发射功率控制命令 TPC可以来自基站 Node B发射的 DPCCH信道, 也可以是来自基站 Node B发射的 F-DPCH信道。 假定最近第 1个时隙的发 射功率控制命令为 最近第 2个时隙的发射功率控制命令为 最 近第 3个时隙的发射功率控制命令为 7 C3。 而、 和 7PC3的取值范围 都是集合 {0, 1} , 即, 不是 "0" 就是 "1" 。
上述 DPCCH、 E-DPDCH. E-DPCCH和 HS-DPCCH信道当前的发射功 率分别为 ^eOT、 PE DPDCH、 E DPCCH PHS D 这些功率值都是线性的, 单 位是 mW。 他们的取值范围在零到 UE的最大发射功率之间。 UE的最大发 射功率通常是 125mW (即 21dBm )或者 250mW (即 24dBm:) , 下同。
上述下一个 TTI内 E-DFDCH信道的调制方式为 BPSK、 4PAM或更高 阶的调制方式(如 8PAM调制方式) 。
步骤 102: 终端 UE根据下一个传输时间间隔 ΤΉ内 E-DPDCH信道的 调制方式选择功率控制方法。如果是 BPSK调制方式,则转到步骤 103执行。 否则转到步驟 104执行。
步骤 103: 由于终端 UE支持 3GPP Release 7或其更高版本, 所以流程 就转到步 104。
步骤 104: 终端 UE根据最近 3个时隙内收到的发射功率控制命令、 上 行信道当前的发射功率和最大发射功率、最小发射功率要求、功率控制调整 步长、 相对 DPCCH信道的功率差因子 来计算和调整应用于下一传输时间 间隔 TTI内上行信道的发射功率。
上述发射功率控制命令 TPC来自步骤 101中的 JTC1、 7PC2和 TPC3。 上述上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH当前的发 射功率来自步骤 101中的 PDPCOT、 PEDPDCH、 PEDPCCH和 PHSDPCCH
上述上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH的最大发 射功率分别为 MaxPDPCCH、 MaxPEDPDCH、 MaxPE DPCCH ^ MaxPHS DPCCH 0 这些功率 值都是线性的, 单位是 mW。 他们的取值范围在零到终端 UE的最大发射功 率之间。
上述上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH的最小发 射功率分别为 ^eai、 MinPE D讓、 MinPED画和 MinPHSDPCCH。 这些功率值 都是线性的, 单位是 mW。 他们的取值范围在零到终端 UE的最大发射功率 之间。
上述功率控制调整步长为 Δ , Δ为分贝值(dB ) , 对数域, 下同。
上述上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH相对 DPCCH 信道的功率差因子 分别为 、 β 、 β β〗 这些 因子都是线性值, 非 负的实数。
上述应用于下一传输时间间隔 ΤΉ内上述上行信道 DPCCH、E-DPDCH、 E-DPCCH和 HS-DPCCH的发射功率计算和调整如下面的 4个子步骤所示。 子步骤 1041: 终端 UE根据最近 3个时隙内从基站 Node B读取到的 TPC1. 和: TPC3来计算合并的发射功率控制命令 rPC^。方法如下面的式 1、 式 2和式 3所示。
TPCrm„ = TPCI + TPC2 + TPC3 (式 1)
<2
TPCDec (式 2)
Figure imgf000016_0001
TPCAdj ^2*TPCDec-l (式 3) 子步骤 1042:终端 UE计算上述上行信道 DPCCH、E-DPDCH、 E-DPCCH 和 HS-DPCCH的发射功率。 方法如下面的式 4、 式 5、 式 6和式 7所示。
AdjP DPCCH ― 10 DPCCH (式 4 ) PE DPDCH :■■ ( ^ ) · AdjPDPCCH (式 5)
DPCCH ~ ("^- ) · AdjPDPCCH (式 6)
DPCCH ― {ί γ . AdjPDPCCH (式 7) 其中的式 5、 式 6和式 7可以归纳为如下表达式:
P。the,' 二 ( "~ n ~ ) · AdjPDpcCH (式 8) 其中, 式 8中的 P。 为除 DPCCH信道外各上行信道的发射功率; A和 Α 分别为上行信道 DPCCH及其他种类上行信道相对 DPCCH信道的功率 差因子, 比如式 5中 ^为上行信道 E-DPDCH相对 DPCCH信道的功率差因 子; 式 6中 为上行信道 E-DPCCH相对 DPCCH信道的功率差因子; 式 7 中 β,'为上行信道 HS-DPCCH相对 DPCCH信道的功率差因子。
上迷上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH当前的发 射功率来自步骤 101中的 ^caf 、 PE PDCH、 PEDPCCH和 PHSDPCCH
子步骤 1043:终端 UE检查上述上行信道 DPCCH、 E-DPDCH、 E-DPCCH 和 HS-DPCCH的发射功率是否在各自信道允许的发射功率范围之内, 既满 足各自最小发射功率要求, 又不超出各自的最大发射功率。如果超出各自信 道允许的发射功率范围, 则 UE 将上述上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH 的发射功率调整到各自信道允许的发射功率范围 内。
子步骤 1044:终端 UE检查上述上行信道 DPCCH、E-DPDCH、 E-DPCCH 和 HS-OPCCH的总的发射功率是否超出 UE的最大发射功率。 如果超出, 则按比例线性调整上述上行信道 DPCCH、 E-DPDCH , E-DPCCH 和 HS-DPCCH的发射功率, 使得上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH的总的发射功率不超出 UE的最大发射功率。
步驟 105: 终端 UE保持在整个 E-DPDCH信道的传输时间间隔内上述 上行信道 DPCCH、 E-DPDCH、 E-DPCCH和 HS-DPCCH的发射功率恒定不 变。 之后整个流程结束。
第二应用实施例
本实施例假定 UE没有上行 DPDCH信道, 也没有随机接入物理信道 ( Physical Random Access Channel; PRACH )信道。 本实施例假定 UE有下 列上行信道: DPCCH、 E-DPDCH, E-DPCCH 和高速专用控制物理信道 ( Dedicated Physical Control Channel (uplink) for HS-DSCH; HS-DPCCH ) 。 还假定在下一个传输时间间隔 TTI 内 E-DPDCH信道的调制方式为 4PAM ( I/Q复用即等效为 16QAM ) 。
步骤 201: 终端读取最近 2个时隙内来自基站: ode B的发射功率控制 命令、 上行信道当前的发射功率和下一个传输时间间隔 TTI内 E-DPDCH信 道的调制方式。
上述发射功率控制命令 TPC可以来自基站 Node B发射的 DPCCH信道, 也可以是来自基站 Node B发射的部分专用物理 F-DPCH信道。 假定最近第 1个时隙的发射功率控制命令为 JPC1 , 最近第 2个时隙的发射功率控制命令 TPCI。 : TPC1和 ΓΡ 的取值范围都是集合 {0, 1} , 即, 不是 "0"就是 "1" 。 上述 DPCCH、 E-DPDCH、 E-DPCCH和 HS-DPCCH信道当前的发射功 率分别为 POTCOT、 PE DCH PE_DPCCH和 PHS— 这些功率值都是线性的, 单 位是 mW。 他们的取值范围在零到 UE的最大发射功率之间。 UE的最大发 射功率通常是 125mW (即 21dBm )或者 250mW (即 24dBm ) , 下同。
才艮据本实施例的假定, 上述下一个 TTI内 E-DPDCH信道的调制方式为
4PAM调制方式或更高阶的调制方式(如 8PAM调制方式)。
步骤 202: 终端根据下一个传输时间间隔内 E-DPDCH信道的调制方式 选择功率控制方法。 因为调制方式是 4PAM或 8PAM调制方式, 所以转到 步驟 204。
步骤 203: 空白。
步骤 204: 终端根据最近 2个时隙内收到的发射功率控制命令、 上行信 道当前的发射功率和最大发射功率、最小发射功率要求、功率控制调整步长、 相对 DPCCH信道的功率差因子 来计算和调整应用于下一 TTI内上行信道 的发射功率。
上述发射功率控制命令来自步骤 201的 TPC1和 TPC2
上述上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH当前的发 射功率来自步骤 201的 PD 、 PE DPDCH、 DPCCH和 DPCCH °
上述上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH的最大发 射功率分别为
Figure imgf000018_0001
、 MaxPE D MaxPE DPCCH和 MaxPHSDPCCH 这些功率 值都是线性的, 单位是 mW。 他们的取值范围在零到 UE的最大发射功率之 间。
上述上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH的最小发 射功率分别为 MinPDPCCH、 MinPE DFDCH、 MinPE DPCCH和 MinPHS DPCCH 这些功率值 都是线性的,单位是 mW。他们的取值范围在零到 UE的最大发射功率之间。
上述功率控制调整步长为 Δ , Δ的单位为分贝值(dB ),对数域, 下同。 上述上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH相对 DPCCH 信道的功率差因子 分别为 A、 Ped β^ β^ 这些 因子都是线性值, 非 负的实数。 上述应用于下一 TTI 内上述上行信道 DPCCH、 E-DPDCH, E-DPCCH 和 HS-DPCCH的发射功率计算和调整如下面的 4个子步骤所示。
子步骤 2041:终端 UE根据最近 2个时隙内从基站 Node B读取到的 TPC1 和: T C2来计算合并的发射功率控制命令 TPC^。 方法如下面的式 9所示。
TPCAdj = TPCl + TPC2 - 1 (式 9 ) 子步骤 2042:终端 UE计算上述上行信道 DPCCI^E-DPDCH E-DPCCH 和 HS-DPCCH的发射功率。 方法如上面第一实施例中的式 4、 式 5、 式 6和 式 7所示。
子步骤 2043:终端 UE检查上述上行信道 DPCCH、 E-DPDCH, E-DPCCH 和 HS-DPCCH的发射功率是否在各自信道允许的发射功率范围之内, 既满 足各自最小发射功率要求, 又不超出各自的最大发射功率。如果超出各自信 道允许的发射功率范围, 则 UE将上述上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH的发射功率调整到各自信道允许的发射功率范围 内。
子步骤 2044:终端 UE检查上述上行信道 DPCCH、 E-DPDCH, E-DPCCH 和 HS-DPCCH的总的发射功率是否超出 UE的最大发射功率。 如果超出, 则按比例线性调整上述上行信道 DPCCH、 E-DPDCH , E-DPCCH 和 HS-DPCCH的发射功率, 使得上行信道 DPCCH、 E-DPDCH、 E-DPCCH和 HS-DPCCH的总的发射功率不超出 UE的最大发射功率。
步骤 205: 终端 UE保持在整个 E-DPDCH信道的传输时间间隔内上述 上行信道 DPCCH、 E-DPDCH, E-DPCCH和 HS-DPCCH的发射功率恒定不 变。 之后整个流程结束。
以上详细说明了本发明装置和方法的工作原理,但这只是为了便于理解 而举的形象化的实例, 不应被视为是对本发明范围的限制。 同样,根据本发 明的技术方案及其实施例的描述,可以做出各种可能的等同改变或替换, 而 所有这些改变或替换都应属于本发明的权利要求的保护范围。 工业实用性 本发明所公开的上行功率控制装置及方法, 适用于宽带码分多址
( WCDMA ) 移动通信系统中的功率控制技术, 尤其是高速分组接入演进 ( HSPA+ ) 系统中增强专用信道(E-DCH )的功率控制。 本发明可减少 I路 和 Q路信号之间的串扰,使 HSPA+系统能更好地支持 4PAM ( I/Q复用即等 效为 16QAM )调制技术或更高阶的调制方式(如 8PAM调制方式)并且兼 容和增强现有的高速上行分组接入(HSUPA )技术(即使用 E-DCH的增强 上行技术) 。

Claims

权 利 要 求 书
1、 一种上行功率控制方法, 应用在高速分组接入演进 HSPA+系统上, 其特征在于, 所述方法包括:
( 1 )终端读取传输时间间隔即 TTI内增强专用物理数据信道 E-DPDCH 的调制方式;
( 2 )所述终端根据增强专用物理数据信道 E-DPDCH的调制方式选择 功率控制方法, 如果是二进制相移键控 BPSK调制方式, 则转到步骤(3 ) ; 如果是 4电平脉冲幅度调制 4PAM调制方式或 8PAM调制方式或更高阶调 制方式, 则转到步骤(4 );
( 3 )所迷终端根据自身支持的版本状况来选择功率控制算法, 如果是 支持 3GPP Release 7或更高版本, 则转到步骤 ( 4 ); 否则按照 3GPP Release 99/5/6的 TS25.214协议规定的方法进行发射功率控制, 之后整个流程结束;
( 4 )所迷终端保持在整个增强专用物理数据信道 E-DPDCH的传输时 间间隔 TTI 内所有上行信道的发射功率恒定不变或部分上行信道的发射功 率恒定不变。
2、 如权利要求 1所述的方法, 其特征在于, 所述步骤(1 ) 中, 所述终 端读取最近若干个时隙内来自基站的发射功率控制命令 TPC、上行信道当前 的发射功率。
3、 如权利要求 2所述的方法, 其特征在于,
所述发射功率控制命令 TPC,包括来自所述基站发射的专用物理控制信 道 DPCCH或来自所述基站发射的部分专用物理信道 F-DPCH的发射功率控 制命令 TPC。
4、 如权利要求 2或 3所述的方法, 其特征在于, 所述步骤(1 ) 中, 所 述发射功率控制命令 TPC的取值范围是集合 {0, 1} , 所述 TPC从所述集合 中择一取值。
5、 如权利要求 2所述的方法, 其特征在于, 所述步驟(4 )中, 所述终 端根据最近若干个时隙内收到的发射功率控制命令 TPC、上行信道当前的发 射功率和最大发射功率、 最小发射功率要求、 功率控制调整步长、 相对 DPCCH信道的功率差因子;^ 来计算应用于下一个传输时间间隔 ΤΉ内上 行信道的发射功率,然后保持发射功率恒定不变或部分上行信道的发射功率 恒定不变。
6、 如权利要求 5所述的方法, 其特征在于, 所述步骤(4 )具体包括: ( 41 )所述终端才艮据所述最近若干个时隙内从所述基站读取到的所述发 射功率控制命令 TPC来计算合并的发射功率控制命令 rpc .;
( 42 )所述终端根据所述上行信道当前的发射功率、功率控制调整步长 Δ、合并的发射功率控制命令; T C^ ,以及上行信道相对 DPCCH信道的功率 差因子^ 计算上述上行信道的发射功率;
( 43 )所述终端检查所述上行信道的发射功率是否在各自信道允许的发 射功率范围之内, 既满足各自最小发射功率要求, 又不超出各自的最大发射 功率; 如果超出各自信道允许的发射功率范围, 则所迷终端 UE将所述上行 信道的发射功率调整到各自信道允许的发射功率范围内;
( 44 )所述终端检查所述述上行信道的总的发射功率是否超出所述终端 UE的最大发射功率; 如果超出则调整所述上行信道的发射功率, 使得上行 信道总的发射功率不超出所述终端的最大发射功率。
7、 如权利要求 6所述的方法, 其特征在于, 所述步骤(41 ) 中, 若所 述终端支持 3GPP Release 7或其更高版本,则计算合并的发射功率控制命令 rpc 根据如下表达式进行:
TPCCom = TPC\ + TPC2 + TPC3 + ...... + TPCn (式 A )
Figure imgf000022_0001
1 (式 C ) 其中, 所述 、 TPC2、 TPC3 TPCn分别为最近第 n个时隙的发 射功率控制命令。
8、 如权利要求 6所述的方法, 其特征在于, 所述步骤(41 ) 中, 若所 述终端在下一个传输时间间隔 TTI内所述增强专用物理数据信道 E-DPDCH 的调制方式为 4PAM或 8PAM调制方式或更高阶调制方式, 则计算合并的 发射功率控制命令 TPCAdj根据如下表达式进行:
TPCAdj = TPC\ + TPC2 + ...... + TPCn - 1 (式 D ) 其中, 所述所述 7PC1、 TPC2 ΓΡΟι分别为最近第 n个时隙的发射功 率控制命令。
9、 如权利要求 7或 8所述的方法, 其特征在于, 所述步骤(42 ) 中, 所迷计算上述上行信道的发射功率, 根据如下表达式进行:
AdjP DP (式 E )
PotUer = (式 F )
Figure imgf000023_0001
其中式 E中 ^为上行信道 DPCCH当前的发射功率, Δ为功率控制 调整步长; 式 F中的 Pol,wr为除上行信道 DPCCH之外的其他上行信道的发射 功率, A和 分别为上行信道 DPCCH及除该上行信道 DPCCH之外的其 他种类上行信道相对 DPCCH信道的功率差因子。
10、 如权利要求 6所述的方法, 其特征在于, 所述步驟(44 )中, 所述 终端调整所述上行信道的发射功率, 包括按比例线性调整。
11、 一种上行功率控制装置, 应用在高速分组接入演进 HSPA+系统上, 其特征在于, 包括:
发射功率控制命令读取模块:用来读取最近若干个时隙内来自基站的发 射功率控制命令;
上行信道当前发射功率读取模块:用来读取终端上行信道当前的发射功 率;
增强专用物理数据信道 E-DPDCH调制方式读取模块: 用来读取增强专 用物理数据信道 E-DPDCH的调制方式;
终端支持第三代移动通信合作伙伴项目 3GPP版本读取模块: 用来读取 终端支持的第三代移动通信合作伙伴项目 3GPP版本;
最大发射功率、最小发射功率要求、功率控制调整步长和功率差因子读 取模块: 用来读取上行信道的最大发射功率、 最小发射功率要求、 功率控制 调整步长和相对 DPCCH信道的功率差因子 ;
上行信道发射功率计算模块: 用来根据读取到的发射功率控制命令、上 行信道当前的发射功率和最大发射功率、最小发射功率要求、功率控制调整 步长、 相对 DPCCH信道的功率差因子 ?来计算各个上行信道的发射功率; 上行信道发射功率设置模块: 用来检查各个上行信道的发射功率,对超 出各自信道允许的发射功率范围的发射功率调整到各自信道允许的发射功 率范围内; 检查各个上行信道的总的发射功率, 若超出终端 UE的最大发射 功率则按比例线性调整各个上行信道的发射功率。
12、 如权利要求 11所示的上行功率控制装置, 其特征在于, 所述发射 功率控制命令读取模块读取的所述发射功率控制命令包括来自所述基站发 射的专用物理控制信道 DPCCH或来自所述基站发射的部分专用物理信道 F-DPCH。
13、 如权利要求 11所示的上行功率控制装置, 其特征在于, 若所述终 端支持 3GPP Release 7或其更高版本, 所述上行信道发射功率计算模块, 根 据如下表达式计算合并的发射功率控制命令 IPC :
TPCrnm = TPCI + TPC2 + TPC3 +…… + TPCn (式 A ) TPCCdm < 2
TPCDec (式 B )
Figure imgf000024_0001
TPCAdj = 2. TPCDec - l (式 C ) 其中, 所述 7PC1、 TPC2、 TPC3 ΓΡΟι分别为最近第 n个时隙的发 射功率控制命令。
14、 如权利要求 11所示的上行功率控制装置, 其特征在于, 若所述终 端在下一个传输时间间隔 TTI内所述增强专用物理数据信道 E-DPDCH的调 制方式为 4PAM或 8PAM调制方式或更高阶调制方式, 所述上行信道发射 功率计算模块,根据如下表达式计算合并的发射功率控制命令 IPC^.:
TPCAdj = TPCI + TPC2 + ...... + TPCn - 1 (式 D ) 其中, 所述所述 IPC1、 TPCI TPQi分别为最近第 n个时隙的发射功 率控制命令。 15、 如权利要求 13或 14所示的上行功率控制装置, 其特征在于, 所述 上行信道发射功率计算模块, 根据如下表达式计算上行信道的发射功率:
AdjP DPCCH = 10 ADJ · PDPCCH (式 E )
PotUer = - · AdjPD誰 (式 F ) 其中, 式 E中^^^为上行信道 DPCCH当前的发射功率, Δ为功率控 制调整步长; 式 F中的 Potker为除上行信道 DPCCH之外的其他上行信道的发 射功率, A和 分别为上行信道 DPCCH及除该上行信道 DPCCH之外的 其他种类上行信道相对 DPCCH信道的功率差因子。
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