WO2017162180A1 - 一种开环功率控制的方法及装置 - Google Patents

一种开环功率控制的方法及装置 Download PDF

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Publication number
WO2017162180A1
WO2017162180A1 PCT/CN2017/077763 CN2017077763W WO2017162180A1 WO 2017162180 A1 WO2017162180 A1 WO 2017162180A1 CN 2017077763 W CN2017077763 W CN 2017077763W WO 2017162180 A1 WO2017162180 A1 WO 2017162180A1
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Prior art keywords
signal
channel
wireless node
power
transmit power
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PCT/CN2017/077763
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English (en)
French (fr)
Inventor
李剑
郝鹏
张峻峰
薛妍
晏潇
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中兴通讯股份有限公司
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Priority to US16/087,238 priority Critical patent/US11191029B2/en
Publication of WO2017162180A1 publication Critical patent/WO2017162180A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/10Open loop power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • 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. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/245TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/247TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter sent by another terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/30TPC using constraints in the total amount of available transmission power
    • H04W52/36TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367Power values between minimum and maximum limits, e.g. dynamic range
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/50TPC being performed in particular situations at the moment of starting communication in a multiple access environment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access

Definitions

  • Embodiments of the present invention relate to the field of wireless communications, and in particular, to a method and apparatus for open loop power control.
  • the 3rd Generation Partnership Project (3GPP) proposes heterogeneous networks (Heterogeneous Networks) in the Advanced Long Term Evolution (LTE-A, Long-Term Evolution Advance) and introduces Small Cell (small cell) enhancement.
  • LTE-A Advanced Long Term Evolution
  • Small Cell Small Cell enhancement
  • the Ultra Dense Network In a UDN network, the transmission node (TP, Transmit Point) is very dense (a macro station includes tens to hundreds of small stations). The coverage of the TP is further narrowed (tens of meters, even ten meters), and each TP may only serve one or several users, and no user's TP enters a sleep or shutdown state. Therefore, the 5G system needs to consider the user-centric access mode, and responds when the user needs it, so as to achieve the purpose of achieving energy saving of the base station and reducing inter-cell interference.
  • TP Transmission node
  • TP Transmit Point
  • the coverage of the TP is further narrowed (tens of meters, even ten meters), and each TP may only serve one or several users, and no user's TP enters a sleep or shutdown state. Therefore, the 5G system needs to consider the user-centric access mode, and responds when the user needs it, so as to achieve the purpose of achieving energy saving of the base station and reducing inter-cell interference.
  • each cell needs to transmit a Primary Synchronization Signal (PSS) and a Secondary Synchronization Channel (SSS) in a 5 ms period.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Channel
  • the user equipment UE, User Equipment
  • each cell transmits a common reference signal (CRS, Cell-specific Reference Signal) on multiple symbols of each 1 ms subframe.
  • CRS Reference Signal received power
  • PBCH Physical Broadcast Channel
  • MIB Master Information Block
  • PDSCH Physical Downlink Shared Channel
  • SIB system information
  • a cell discovery signal (DRS, Discovery Reference Signal) and a small cell on/off mechanism are introduced to reduce power consumption and reduce inter-cell interference.
  • DRS Cell Discovery Signal
  • the small cell transmits the DRS signal using a period of 40ms or more, and turns off other signal transmission.
  • the terminal detects the DRS the small cell starts normal signal transmission and performs service transmission.
  • This mechanism can save power during non-business periods and reduce interference to neighbors.
  • this mechanism has two problems: The first is that the terminal needs to notify the macro station after detecting the DRS and wake up the small cell by the macro station. For a 5G system, assuming that the system is isolated, it cannot rely on the previous network. This wake-up mechanism is not available.
  • DRS itself is a combination of traditional CRS and PSS/SSS signals. Although the transmission frequency is limited, these signals are still periodic, and the power overhead is relatively large. In fact, there is no need to read CRS and PSS/ In SSS, these powers are wasted and further consideration needs to be made to reduce the emission ratio of the relevant signals.
  • the existing cell discovery and access mechanism is difficult to support the UDN super-dense network, and does not satisfy the 5G system overhead and user-centric requirements, and cannot achieve the effect of green energy conservation. Therefore, the 5G new Radio Access Technology (RAT) system needs to consider the terminal-centric access mode to achieve fast access of the terminal, reduce the type of common signal/channel, and reduce the transmission frequency of the common signal. The transmission power of the base station is greatly reduced to achieve the purpose of green energy saving of the base station.
  • RAT Radio Access Technology
  • cell discovery and synchronization can be implemented by using a new discovery reference signal (N-DRS, New Discovery Reference Signal), which is similar to the synchronization channel in the LTE system, and can be transmitted in a narrowband and low density, and the transmission period can be longer;
  • N-DRS New Discovery Reference Signal
  • the access configuration information may be obtained by using the payload of the DRS signal, or obtained by the base station of the LTE system, or obtained by using a broadcast signal/broadcast channel, and the terminal may obtain the access configuration information. Initiate an uplink random access request. Load payload is different from broadcast signal/wide
  • the broadcast channel can be understood as a part of the N-DRS signal, that is, the N-DRS signal includes a DRS sequence and a payload.
  • the embodiments of the present invention provide a method and an apparatus for controlling open loop power, which can ensure that an uplink random access request is sent by using a suitable transmit power in a user-centric access scenario, thereby resisting the impact of the path loss. Avoid interference between upstream users.
  • An embodiment of the present invention provides a method for controlling open loop power, which is applied to a first wireless node, including: sending a first signal/first channel to a second wireless node;
  • the transmit power is used by the second wireless node to calculate a downlink path loss and determine an uplink transmit power.
  • indicating that the transmit power of the first signal/first channel of the second wireless node includes at least one of the following:
  • Transmit power of the first signal/first channel is sent to the second wireless node in a second signal/second channel or a third signal/third channel;
  • the first signal/first channel indicates a manner of acquiring the transmit power of the first signal/first channel
  • the transmit power of the first signal/first channel is in a mapping relationship with the identifier ID of the first signal/first channel.
  • indicating that the transmit power of the fourth signal/fourth channel of the second wireless node includes the following At least one:
  • Transmit power of the fourth signal/channel is transmitted to the second wireless node in a second signal/second channel or a third signal/third channel;
  • the first signal/first channel indicates a manner of acquiring the transmit power of the fourth signal/fourth channel.
  • the second signal/second channel or the third signal/third channel includes: an open loop power control parameter.
  • the transmission period and/or frequency of the second signal/second channel is the same as the transmission period and/or frequency of the first signal/first channel, or the second signal/second channel
  • the transmission period and/or frequency has a multiple relationship with the transmission period and/or frequency of the first signal/first channel.
  • the time domain and/or the frequency domain resource position occupied when the second signal/second channel is sent is on a fixed physical resource, or the second signal/second channel is occupied.
  • the time domain and/or the frequency domain resource location has a corresponding positional relationship with the time domain and/or the frequency domain resource location occupied when the first signal/first channel is transmitted.
  • the third signal/channel includes one or more sets of access configuration messages, where the access configuration message carries the first wireless node that uses the access configuration message to send the The transmit power of a signal/channel or the transmit power of a fourth signal/channel.
  • the third signal and the first signal/first channel are sent by different first wireless nodes.
  • the different first wireless node is: the first wireless node in different systems;
  • the different system is one of a global mobile communication system GSM, a long term evolution LTE, a universal mobile communication system UMTS, and a new radio access type New RAT.
  • the obtaining, by the first signal/the first channel, the acquiring manner of the transmit power of the first signal/the first channel includes:
  • the acquiring, by the first signal/channel, the transmit power of the fourth signal/fourth channel includes:
  • the first signal/first channel is used for synchronization and/or cell discovery, and occupies part of downlink bandwidth transmission;
  • the fourth signal/fourth channel is transmitted discretely or continuously over the entire downlink bandwidth.
  • the open loop power control parameter includes at least one of: maximum transmit power information, target receive power information, deviation information of power requirements of different preamble types, access times information, step information of power increment, and compensation. Adjustment amount information.
  • the compensation adjustment amount information is used to compensate for path loss, or used to compensate for uplink transmission power.
  • the direction of the beam used for transmitting the fourth signal/fourth channel is the same as the direction of the beam used for transmitting the second signal/second channel.
  • the second signal/second channel or the third signal/third channel further includes: access compensation adjustment amount information and/or the first wireless node quantity information.
  • the embodiment of the invention further provides a method for open loop power control, which is applied to a second wireless node, and includes:
  • receiving, by the first wireless node, the transmit power and/or the open loop power control parameter of the first signal/the first channel or the fourth signal/fourth channel includes:
  • the transmit power of the first signal/first channel or the fourth signal/fourth channel sent by the first wireless node or Acquiring the first signal/first channel transmission sent by the first wireless node according to the mapping relationship between the transmit power of the first signal/first channel and the identifier ID of the first signal/first channel Power; and / or,
  • the open loop power control parameter is obtained in the second signal/second channel or the third signal/third channel.
  • the receiving period and/or frequency of the second signal/second channel is the same as the receiving period and/or frequency of the first signal/first channel, or the second signal/second channel
  • the reception period and/or frequency has a multiple relationship with the reception period and/or frequency of the first signal/first channel.
  • the time domain and/or the frequency domain resource location occupied when the second signal/second channel is received is on a fixed physical resource, or the second signal/second channel is received.
  • the time domain and/or the frequency domain resource location has a corresponding positional relationship with the time domain and/or the frequency domain resource location occupied when the first signal/first channel is received.
  • the open loop power control parameter includes at least one of: maximum transmit power information, target receive power information, deviation information of power requirements of different preamble types, access times information, step information of power increment, and compensation. Adjustment amount information.
  • the compensation adjustment amount information is used to compensate for path loss, or used to compensate for uplink transmission power.
  • the calculating the downlink path loss includes:
  • the loop power control parameter calculates the downlink path loss.
  • the downlink path loss PL is calculated according to the following formula:
  • PL represents a path loss
  • P1 Tx indicates that the second wireless node receives the transmit power used by the first wireless node to transmit the first signal/channel
  • P1 RX indicates that the second wireless node measures the obtained Receive power of a signal/PL channel
  • P2 Tx indicates that the second wireless node receives the transmit power used by the first wireless node to transmit the fourth signal/fourth channel
  • P2 RX indicates that the second wireless node measures The received power of the fourth signal/fourth channel is obtained
  • represents the compensation adjustment amount.
  • the uplink transmit power includes a transmit power of an uplink random access signal
  • Determining the transmit power of the uplink random access signal includes: determining, according to the downlink path loss and/or the open loop power control parameter, the transmit power of the uplink random access signal.
  • the transmit power P RACH of the uplink random access signal is calculated according to the following formula:
  • P max represents the maximum transmit power of the second wireless node
  • P 0 represents the target received power
  • represents the compensated adjustment amount
  • PL represents the path loss
  • P RACH represents the transmit power of the uplink random access signal
  • obtaining the received power of the first signal/the first channel includes:
  • the filtered received power is obtained.
  • obtaining the transmit power of the first signal/the first channel further includes: receiving access compensation adjustment amount information sent by the first wireless node; and using the access compensation adjustment amount information for the second The wireless node selects the first wireless node.
  • the selecting, by the second wireless node, the first wireless node includes:
  • the second wireless node estimates the broadband signal received power based on the received power of the first wireless node and the access compensation adjustment amount information, and selects the first wireless node.
  • the method before calculating the downlink path loss and determining the transmit power of the uplink random access signal, the method further includes:
  • the reference quantity information determines the transmit power of the uplink random access signal.
  • An embodiment of the present invention provides an apparatus for controlling open-loop power, which is disposed at a first wireless node, and includes:
  • a first sending module configured to send a first signal/first channel to the second wireless node
  • a first indication module configured to indicate a transmit power of the first signal/first channel of the second wireless node
  • a second sending module configured to send the first signal/the first channel and the fourth signal/fourth channel to the second wireless node
  • a second indication module configured to indicate a transmit power of the fourth signal/fourth channel of the second wireless node
  • the transmit power is used by the second wireless node to calculate a downlink path loss and determine an uplink transmit power.
  • the first indication module indicates that the transmit power of the first signal/first channel of the second wireless node includes at least one of the following:
  • Transmit power of the first signal/first channel is sent to the second wireless node in a second signal/second channel or a third signal/third channel;
  • the first signal/first channel indicates a manner of acquiring the transmit power of the first signal/first channel
  • the transmit power of the first signal/first channel is in a mapping relationship with the identifier ID of the first signal/first channel.
  • the second indication module indicates that the transmit power of the fourth signal/fourth channel of the second wireless node includes at least one of the following:
  • Transmitting power of the fourth signal/fourth channel is sent to the second wireless node in a second signal/second channel or a third signal/third channel;
  • the first signal/first channel indicates a manner of acquiring the transmit power of the fourth signal/fourth channel.
  • the first signal/first channel of the first indication module indicates the first signal / How to obtain the transmission power of the first channel includes:
  • the acquiring, by the first signal/the first channel of the second indication module, the acquisition manner of the transmit power of the fourth signal/fourth channel includes:
  • the first sending module is further configured to use the first signal/first channel for synchronization and or cell discovery to occupy part of downlink bandwidth transmission;
  • the second sending module is further configured to send the fourth signal/fourth channel discretely or continuously on all downlink bandwidths.
  • the second transmitting module sends the fourth signal/fourth channel to use the same beam direction as the second signal/second channel used.
  • the embodiment of the invention further provides an apparatus for controlling the open loop power, which is disposed on the second wireless node, and includes:
  • the first receiving module is configured to receive the first signal/first channel sent by the first wireless node and measure the received power of the first signal/first channel;
  • a first power module configured to obtain a transmit power and/or an open loop power control parameter of the first signal/first channel
  • a second receiving module configured to receive a fourth signal/fourth channel sent by the first wireless node, and measure the received power of the fourth signal/fourth channel
  • a second power module configured to obtain a transmit power and/or an open loop power control parameter of the fourth signal/fourth channel
  • the calculation module is configured to calculate the downlink path loss and determine the uplink transmit power.
  • the first power module obtains the first signal/first channel or the second power
  • the module obtains the transmit power and/or open loop power control parameters of the fourth signal/fourth channel, including:
  • the transmit power of the first signal/first channel or the fourth signal/fourth channel sent by the first wireless node or Acquiring the first signal/first channel transmission sent by the first wireless node according to the mapping relationship between the transmit power of the first signal/first channel and the identifier ID of the first signal/first channel Power; and / or,
  • the open loop power control parameter is obtained in the second signal/second channel or the third signal/third channel.
  • the calculating module calculates the downlink path loss, including:
  • the loop power control parameter calculates the downlink path loss.
  • the calculating module calculates the downlink path loss PL according to the following formula:
  • PL represents a path loss
  • P1 Tx indicates that the second wireless node receives the transmit power used by the first wireless node to transmit the first signal/channel
  • P1 RX indicates that the second wireless node measures the obtained Received power of a signal/channel
  • P2 Tx indicates that the second wireless node receives the transmit power used by the first wireless node to transmit the fourth signal/fourth channel
  • P2 RX indicates that the second wireless node measures and obtains The received power of the fourth signal/fourth channel
  • represents the compensation adjustment amount.
  • the uplink transmit power includes a transmit power of an uplink random access signal
  • the determining, by the calculating module, the transmit power comprises: determining, according to the downlink path loss and/or the open loop power control parameter calculation, the transmit power of the uplink random access signal.
  • the calculating module calculates a transmit power P RACH of the uplink random access signal according to the following formula:
  • P max represents the maximum transmit power of the second wireless node
  • P 0 represents the target received power
  • represents the compensated adjustment amount
  • PL represents the path loss
  • P RACH represents the transmit power of the uplink random access signal
  • the receiving, by the first power module, the received power of the first signal/the first channel includes:
  • the filtered received power is obtained.
  • the obtaining, by the first power module, the transmit power of the first signal/the first channel further includes: receiving the access compensation adjustment amount information sent by the first wireless node; and the access compensation adjustment amount information Used by the second wireless node to select the first wireless node.
  • the selecting, by the second wireless node of the first power module, the first wireless node includes:
  • the second wireless node estimates the broadband signal received power based on the received power of the first wireless node and the access compensation adjustment amount information, and selects the first wireless node.
  • it also includes:
  • a third receiving module configured to receive the quantity information of the first wireless node that is sent by the first wireless node
  • the determining module is configured to determine the transmitting power of the uplink random access signal by using the reference quantity information.
  • the embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions for performing the method of open loop power control according to any of the above.
  • the invention has the following beneficial effects:
  • FIG. 1 is a flow chart of a method for open loop power control in an embodiment of the present invention
  • FIG. 2 is a flow chart of another method for open loop power control in an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an apparatus for controlling open loop power according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of another apparatus for open loop power control in an embodiment of the present invention.
  • FIG. 5 is a flowchart of an open loop power control method according to Embodiment 1 of the present invention.
  • FIG. 6 is a flowchart of an open loop power control method according to Embodiment 2 of the present invention.
  • Embodiment 9 is a flowchart of an open loop power control method according to Embodiment 5 of the present invention.
  • FIG. 10 is a flowchart of an open loop power control method according to Embodiment 6 of the present invention.
  • FIG. 11 is a flowchart of an open loop power control method according to Embodiment 7 of the present invention.
  • FIG. 13 is a flowchart of an open loop power control method according to Embodiment 9 of the present invention.
  • FIG. 14 is a diagram showing transmission power information of a synchronization signal/channel ID and a synchronization signal/channel according to an embodiment of the present invention
  • 15 is a diagram showing transmission power information of a synchronization signal/channel ID and a discovery reference signal according to an embodiment of the present invention.
  • an open loop power control method is applied to a first wireless node, including:
  • the transmit power is used by the second wireless node to calculate a downlink path loss and determine a transmit power of the uplink random access signal.
  • the transmitting power indicating the first signal/first channel of the second wireless node includes at least one of the following:
  • Transmit power of the first signal/first channel is sent to the second wireless node in a second signal/second channel or a third signal/third channel;
  • the first signal/first channel indicates a manner of acquiring the transmit power of the first signal/first channel
  • the transmit power of the first signal/first channel is in a mapping relationship with the identifier ID of the first signal/first channel.
  • the transmitting power indicating the fourth signal/fourth channel of the second wireless node includes at least one of the following:
  • Transmitting power of the fourth signal/fourth channel is sent to the second wireless node in a second signal/second channel or a third signal/third channel;
  • the first signal/first channel indicates a manner of acquiring the transmit power of the fourth signal/fourth channel.
  • the first signal/first channel includes a synchronization signal or a synchronization channel.
  • the fourth signal/fourth channel includes: a common reference signal (CRS) or a channel state information reference signal (CSI-RS).
  • CRS common reference signal
  • CSI-RS channel state information reference signal
  • the second signal/second channel includes a physical broadcast channel (PBCH) or bearer payload information of the first signal.
  • PBCH physical broadcast channel
  • the third signal/third channel includes an access configuration set.
  • the first wireless node transmits a synchronization signal/synchronization channel, and the transmission power of the synchronization signal/synchronization channel is transmitted in the PBCH, or the transmission power bearer of the synchronization signal/synchronization channel is sent in the access configuration set.
  • the synchronization signal/synchronization channel indicates a manner of acquiring the transmission power of the synchronization signal/synchronization channel, or the transmission power of the synchronization signal/synchronization channel is mapped to the ID of the synchronization signal/synchronization channel.
  • the first wireless node transmits a synchronization signal/synchronization channel and a CRS, where the transmit power of the CRS is transmitted in the PBCH, or the transmit power bearer of the CRS is sent in the access configuration set, or
  • the synchronization signal/synchronization channel indicates a manner of acquiring the transmission power of the CRS;
  • the second signal/second channel or the third signal/third channel includes: an open loop power control parameter.
  • the open loop power control parameter is used to perform power adjustment on the uplink of the second wireless node (UE), and may include at least one of: maximum transmit power information, target receive power information, and deviation information of different preamble sequence types. , access times information, step size information of power increment, compensation adjustment amount information, and the like.
  • the transmission period and/or frequency of the second signal/second channel is the same as the transmission period and/or frequency of the first signal/first channel, or the transmission period of the second signal/second channel and / or frequency has a multiple relationship with the transmission period and / or frequency of the first signal / first channel.
  • the time domain and/or the frequency domain resource position occupied when the second signal/second channel is transmitted is on a fixed physical resource, or the time domain occupied when the second signal/second channel is transmitted and/or Or the frequency domain resource location has a corresponding positional relationship with the time domain and/or the frequency domain resource location occupied when the first signal/first channel is transmitted.
  • the third signal/third channel includes one or more sets of access configuration messages, and the access configuration message carries the first wireless node that uses the access configuration message to send the first signal. / transmit power of the first channel or transmit power of the fourth signal / fourth channel.
  • the third signal and the first signal/first channel are sent by different first wireless nodes, the different first wireless nodes may be under different systems, and the system may be global mobile Communication System (GSM, Global System for Mobile Communication), LTE, Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications System) Or New RAT.
  • GSM Global System for Mobile Communication
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • New RAT New RAT
  • the acquiring manner of the first signal/first channel indicating the transmit power of the first signal/first channel includes:
  • the manner in which the first signal/first channel indicates the transmission power of the fourth signal/fourth channel includes:
  • the first signal/first channel is used for synchronization and/or cell discovery, and occupies part of downlink bandwidth for transmission;
  • the fourth signal/fourth channel is transmitted discretely or continuously over the entire downlink bandwidth.
  • the open loop power control parameter includes at least one of the following: maximum transmit power information, target receive power information, deviation information of power requirements of different preamble types, access times information, step information of power increment, and compensation adjustment amount information.
  • the compensation adjustment amount information is used to compensate for the path loss, or is used to compensate the uplink transmission power.
  • the beam direction used to transmit the fourth signal/fourth channel is the same as the direction of the beam used to transmit the second signal/second channel.
  • the second signal/second channel or the third signal/third channel further includes: access compensation adjustment amount information and/or the first wireless node quantity information.
  • an embodiment of the present invention further provides an open loop power control method, which is applied to a second wireless node, and includes:
  • Receiving, by the first wireless node, the transmit power and/or the open loop power control parameter of the first signal/the first channel or the fourth signal/fourth channel includes:
  • the transmit power of the first signal/first channel or the fourth signal/fourth channel sent by the first wireless node or Acquiring the first signal/first channel transmission sent by the first wireless node according to the mapping relationship between the transmit power of the first signal/first channel and the identifier ID of the first signal/first channel Power; and / or,
  • the open loop power control parameter is obtained in the second signal/second channel or the third signal/third channel.
  • the reception period and/or frequency of the second signal/second channel is the same as the reception period and/or frequency of the first signal/first channel, or the reception period of the second signal/second channel and / or frequency has a multiple relationship with the reception period and / or frequency of the first signal / first channel.
  • the time domain and/or frequency domain resource location occupied when receiving the second signal/second channel is on a fixed physical resource, or the time domain occupied by receiving the second signal/second channel and/or Or the location relationship between the frequency domain resource location and the time domain and/or the frequency domain resource location occupied by the first signal/first channel transmission
  • the open loop power control parameter includes at least one of the following: maximum transmit power information, target receive power information, deviation information of power requirements of different preamble types, access times information, step information of power increment, and compensation adjustment amount information.
  • the compensation adjustment amount information is used to compensate for the path loss, or is used to compensate the uplink transmission power.
  • the calculating the downlink path loss includes:
  • the downlink loss is calculated by the transmit power and/or the open loop power control parameter of the first signal/first channel or the fourth signal/fourth channel.
  • PL indicates a path loss
  • P1 Tx indicates that the second wireless node receives the transmit power used by the first wireless node to transmit the first signal/first channel
  • P1 RX indicates that the second wireless node measures the obtained location The received power of the first signal/first channel
  • P2 Tx indicates that the second wireless node receives the transmit power used by the first wireless node to send the fourth signal/fourth channel
  • P2 RX represents the second The wireless node measures the received power of the fourth signal/fourth channel
  • represents the compensation adjustment amount.
  • Determining the transmit power of the uplink random access signal includes: determining, according to the downlink path loss and/or the open loop power control parameter calculation, the transmit power of the uplink random access signal.
  • P max represents the maximum transmit power of the second wireless node
  • P 0 represents the target received power
  • represents the compensated adjustment amount
  • PL represents the path loss
  • P RACH represents the transmit power of the uplink random access signal
  • Obtaining the received power of the first signal/first channel includes:
  • the filtered received power is obtained.
  • Obtaining the transmit power of the first signal/first channel further includes: receiving access compensation adjustment amount information sent by the first wireless node; and using the access compensation adjustment amount information for the second wireless section The point selects the first wireless node.
  • the selecting, by the second wireless node, the first wireless node includes:
  • the second wireless node estimates the broadband signal received power based on the received power of the first wireless node and the access compensation adjustment amount information, and selects the first wireless node.
  • the method further includes:
  • the reference quantity information determines the transmit power of the uplink random access signal.
  • the path loss is estimated by the narrowband signal N-DRS and the RSRP is measured, and the necessary open loop power parameter is added to determine the uplink transmit power.
  • the path loss estimation and measurement of RSRP are performed by the wideband signal CRS; the interference problem of the CRS has always been a serious problem in the LTE network. For this reason, the FeelIC issue is also discussed in the Rel-11 stage, and the narrowband signal is passed.
  • the N-DRS replaces the CRS for RSRP measurement, which can reduce the interference and improve the forward compatibility of the system design.
  • the path loss estimation needs to know the transmit power of the signal.
  • the transmit power information of the CRS is transmitted through the SIB message, and the SIB message bearer In the clerk channel, it is therefore necessary to schedule/allocate resources for the terminal for the transmission of the SIB message, which increases the time for acquiring the information.
  • the transmission power of the N-DRS can pass the load of the N-DRS signal. Obtained in the payload or acquired by the base station of the LTE system or obtained through the broadcast signal/channel, whether the transmission power information of the N-DRS is carried in the payload payload or the broadcast signal/channel, and is carried on the physical channel.
  • the used resources and the code rate are fixed, so that the terminal can quickly obtain the transmission power information of the N-DRS for opening. Power control, uplink access request initiated quickly.
  • an embodiment of the present invention further provides an apparatus for controlling open-loop power, which is disposed on a first wireless node, and includes:
  • a first sending module configured to send a first signal/first channel to the second wireless node
  • a first indication module configured to indicate a transmit power of the first signal/first channel of the second wireless node
  • a second sending module configured to send the first signal/the first channel and the fourth signal/fourth channel to the second wireless node
  • a second indication module configured to indicate a transmit power of the fourth signal/fourth channel of the second wireless node
  • the transmit power is used by the second wireless node to calculate a downlink path loss and determine a transmit power of the uplink random access signal.
  • the first indication module indicates that the transmit power of the first signal/first channel of the second wireless node includes at least one of the following:
  • Transmit power of the first signal/first channel is sent to the second wireless node in a second signal/second channel or a third signal/third channel;
  • the first signal/first channel indicates a manner of acquiring the transmit power of the first signal/first channel
  • the transmit power of the first signal/first channel is in a mapping relationship with the identifier ID of the first signal/first channel.
  • the second indication module indicates that the transmit power of the fourth signal/fourth channel of the second wireless node includes at least one of the following:
  • Transmitting power of the fourth signal/fourth channel is sent to the second wireless node in a second signal/second channel or a third signal/third channel;
  • the first signal/first channel indicates a manner of acquiring the transmit power of the fourth signal/fourth channel.
  • the manner in which the first signal/first channel of the first indication module indicates that the transmit power of the first signal/first channel is obtained includes:
  • the method for obtaining the transmit power of the fourth signal/fourth channel by the first signal/first channel of the second indication module includes:
  • the first sending module is further configured to use the first signal/first channel for synchronization and or cell discovery to occupy part of downlink bandwidth transmission;
  • the second sending module is further configured to send the fourth signal/fourth channel discretely or continuously on all downlink bandwidths.
  • the beam direction used by the second sending module to send the fourth signal/fourth channel is the same as the direction of using the second signal/second channel.
  • an embodiment of the present invention further provides an apparatus for controlling open-loop power, which is disposed on a second wireless node, and includes:
  • the first receiving module is configured to receive the first signal/first channel sent by the first wireless node and measure the received power of the first signal/first channel;
  • a first power module configured to obtain a transmit power and/or an open loop power control parameter of the first signal/first channel
  • a second receiving module configured to receive a fourth signal/fourth channel sent by the first wireless node, and measure the received power of the fourth signal/fourth channel
  • a second power module configured to obtain a transmit power and/or an open loop power control parameter of the fourth signal/fourth channel
  • the calculation module is configured to calculate a downlink path loss and determine a transmit power of the uplink random access signal.
  • Obtaining, by the first power module, the first signal/first channel or the second power module, the transmit power and/or the open loop power control parameter of the fourth signal/fourth channel includes:
  • the transmit power of the first signal/first channel or the fourth signal/fourth channel sent by the first wireless node or Acquiring the first signal/first channel transmission sent by the first wireless node according to the mapping relationship between the transmit power of the first signal/first channel and the identifier ID of the first signal/first channel Power; and / or,
  • the open loop power control parameter is obtained in the second signal/second channel or the third signal/third channel.
  • the calculating module calculates the downlink path loss includes:
  • the loop power control parameter calculates the downlink path loss.
  • the calculation module calculates the downlink path loss according to the following formula:
  • PL indicates a path loss
  • P1 Tx indicates that the second wireless node receives the transmit power used by the first wireless node to transmit the first signal/first channel
  • P1 RX indicates that the second wireless node measures the obtained location The received power of the first signal/first channel
  • P2 Tx indicates that the second wireless node receives the transmit power used by the first wireless node to send the fourth signal/fourth channel
  • P2 RX represents the second The wireless node measures the received power of the fourth signal/fourth channel
  • represents the compensation adjustment amount.
  • Determining, by the calculating module, the transmit power of the uplink random access signal includes: determining, according to the downlink path loss and/or the open loop power control parameter, the transmit power of the uplink random access signal.
  • the calculation module calculates the transmit power of the uplink random access signal according to the following formula:
  • P max represents the maximum transmit power of the second wireless node
  • P 0 represents the target received power
  • represents the compensated adjustment amount
  • PL represents the path loss
  • P RACH represents the transmit power of the uplink random access signal
  • Obtaining the received power of the first signal/first channel by the first power module includes:
  • the filtered received power is obtained.
  • the obtaining, by the first power module, the transmit power of the first signal/the first channel further includes: receiving the access compensation adjustment amount information sent by the first wireless node; the access compensation adjustment amount information is used by the The second wireless node selects the first wireless node.
  • the selecting, by the second wireless node of the first power module, the first wireless node includes:
  • the second wireless node estimates the broadband signal received power based on the received power of the first wireless node and the access compensation adjustment amount information, and selects the first wireless node.
  • the device further includes:
  • a third receiving module configured to receive the quantity information of the first wireless node that is sent by the first wireless node
  • the determining module is configured to determine the transmitting power of the uplink random access signal by using the reference quantity information.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a method for open loop power control is provided. As shown in FIG. 5, the process includes the following steps:
  • Step S101 the base station sends a synchronization signal/synchronization channel
  • the synchronization signal/synchronization channel is a narrowband signal/narrowband channel, and only part of the downlink bandwidth is used for transmission;
  • Step S102 the terminal measures the received power of the synchronization signal/synchronization channel
  • the terminal detects the synchronization signal/synchronization channel for establishing downlink synchronization with the base station, and acquiring the received power of the synchronization signal/synchronization channel;
  • the channel estimation can be performed simultaneously by using the synchronization signal/synchronization channel, and the result of the channel estimation can be used for demodulation of the synchronization signal payload;
  • Step S103 the base station sends a synchronization signal payload, and the synchronization signal payload carries the transmission power and the open loop power parameter of the synchronization signal/synchronization channel;
  • the synchronization signal payload can be understood as a part of the synchronization signal, that is, the synchronization signal is composed of a synchronization sequence plus a synchronization signal payload;
  • the synchronization signal payload can be transmitted along with the synchronization signal/channel, that is, the transmission period/frequency is consistent, and a synchronization signal/synchronization channel is sent along with a synchronization signal payload;
  • the time domain and or the frequency domain resource position occupied by the broadcast signal/broadcast channel are fixed;
  • Step S104 the terminal receives and obtains the transmission power of the synchronization signal/synchronization channel and the open loop power control Parameter, calculating downlink path loss, determining the transmit power of the uplink random access signal;
  • the open loop power control parameter includes maximum transmit power information, target received power information, and compensation adjustment amount information;
  • P max refers to the maximum transmit power of the terminal
  • P 0 refers to the target received power
  • refers to the compensated adjustment amount, which is one of the open loop power control parameters, used to compensate the uplink transmit power
  • PL refers to the path loss
  • RACH refers to the transmit power of the uplink random access signal
  • Step S105 the terminal sends an uplink random access signal.
  • the terminal transmits the uplink random access signal with P RACH .
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • a method for open loop power control is provided. As shown in FIG. 6, the process includes the following steps:
  • Step S201 the base station 1 transmits a synchronization signal/synchronization channel
  • base station 1 is a base station using a new RAT system
  • the synchronization signal/synchronization channel is a narrowband signal/channel, and only part of the downlink bandwidth is used for transmission;
  • Step S202 the terminal measures the received power of the synchronization signal/synchronization channel
  • the terminal detects the synchronization signal/synchronization channel for establishing downlink synchronization with the base station 1, and at the same time, acquiring the reception power of the synchronization signal/synchronization channel;
  • Step S203 the base station 2 sends an access configuration set, where the access configuration set carries the transmit power and the open loop power parameter of the synchronization signal/synchronization channel;
  • the access configuration set includes multiple sets of access configuration messages, and different synchronization signals/synchronization channel IDs correspond to different access configuration messages;
  • the base station 2 is a base station using an LTE system
  • Step S204 the terminal receives and obtains the transmit power and the open loop power control parameter of the synchronization signal/synchronization channel, calculates the downlink path loss, and determines the transmit power of the uplink random access signal;
  • the open loop power control parameter includes maximum transmit power information, target received power information, and compensation adjustment amount information;
  • the base station uses the channel dissimilarity to estimate the deviation of the synchronization signal/channel from the frequency domain position signal strength of the random access signal, and determines and transmits the compensation adjustment amount ⁇ for Compensation for road damage;
  • P max refers to the maximum transmit power of the terminal
  • P 0 refers to the target received power
  • PL refers to the path loss
  • P RACH refers to the transmit power of the uplink random access signal
  • Step S205 the terminal sends an uplink random access signal.
  • the terminal sends the uplink random access signal by using the P RACH ;
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • a method for open loop power control is provided. As shown in FIG. 7, the process includes the following steps:
  • Step S301 the base station 1 transmits a synchronization signal/synchronization channel
  • base station 1 is a base station using a new RAT system
  • the synchronization signal/channel is a narrowband signal/narrowband channel, and only part of the downlink bandwidth is used for transmission;
  • Step S302 the terminal measures the received power of the synchronization signal/synchronization channel, and receives the broadcast signal or the access configuration set according to the synchronization signal/synchronization channel indication;
  • the terminal detects the synchronization signal/synchronization channel for establishing downlink synchronization with the base station 1, and at the same time, acquiring the reception power of the synchronization signal/synchronization channel;
  • step S303a by indicating a bit in the synchronization signal/synchronization channel sequence, for example, the last bit of the synchronization signal/synchronization channel sequence, if the bit is 0, indicating that the terminal needs to receive the broadcast signal/channel of the base station 1, step S303a is performed. If it is 1 that the terminal is required to go to the base station 2 to obtain the access configuration set, step S303b is performed;
  • Step S303a the base station 1 transmits a broadcast signal/channel, and the broadcast signal/broadcast channel carries the transmit power and the open loop power parameter of the synchronization signal/synchronization channel;
  • the broadcast signal/broadcast channel has a multiple relationship with the transmission period/frequency of the synchronization signal/synchronization channel, and the plurality of synchronization signals/synchronization channels are transmitted correspondingly to transmit one broadcast signal/broadcast channel;
  • the time domain and or the frequency domain resource position occupied by the broadcast signal/broadcast channel are in a fixed positional relationship with the time domain and the frequency domain resource location occupied by the synchronization signal/synchronization channel, for example, a synchronization signal/
  • the synchronization channel is transmitted on the nth subframe, and the broadcast signal/broadcast channel is transmitted on the n+2 subframe;
  • Step S303b the base station 2 sends an access configuration set, and the access configuration set carries the transmit power and the open loop power parameter of the synchronization signal/synchronization channel;
  • the access configuration set includes multiple sets of access configuration messages, and different synchronization signals/synchronization channel IDs correspond to different access configuration messages;
  • base station 2 is a base station using a new RAT system
  • Step S304 the terminal receives and obtains the transmit power and the open loop power control parameter of the synchronization signal/synchronization channel, calculates the downlink path loss, and determines the transmit power of the uplink random access signal;
  • the open loop power control parameter includes maximum transmit power information, target received power information, and compensation adjustment amount information;
  • P max refers to the maximum transmit power of the terminal
  • P 0 refers to the target received power
  • PL refers to the path loss
  • P RACH refers to the transmit power of the uplink random access signal
  • Step S305 the terminal sends an uplink random access signal.
  • the terminal transmits the uplink random access signal with P RACH .
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • a method for open loop power control is provided. As shown in FIG. 8, the process includes the following steps:
  • Step S401 the base station sends a synchronization signal/synchronization channel
  • the synchronization signal/synchronization channel is a narrowband signal/narrowband channel, and only part of the downlink bandwidth is used for transmission;
  • Step S402 the terminal measures the received power of the synchronization signal/synchronization channel, obtains the transmission power of the synchronization signal/channel according to the synchronization signal/synchronization channel ID lookup table, and calculates the downlink path loss;
  • the terminal detects the synchronization signal/synchronization channel for establishing downlink synchronization with the base station, and at the same time, acquiring the reception power of the synchronization signal/synchronization channel;
  • the transmission power information of the synchronization signal/channel is obtained according to the synchronization signal/synchronization channel ID lookup table.
  • the synchronization signal ID1 corresponds to the transmission power. 30dBm
  • the synchronization signal ID2 corresponds to a transmission power of 27 dBm, and the synchronization signal ID3 corresponds to a transmission power of 24 dBm;
  • Step S403 the base station sends a broadcast signal/broadcast channel, and the broadcast signal/broadcast channel carries an open loop power parameter;
  • the broadcast signal/broadcast channel can be transmitted along with the synchronization signal/synchronization channel, that is, the transmission period/frequency is consistent, and transmitting a synchronization signal/synchronization channel is accompanied by transmitting a broadcast signal/broadcast channel;
  • the time domain and the frequency domain resource location occupied by the broadcast signal/broadcast channel are fixed. set;
  • the broadcast signal/broadcast channel may further include access compensation adjustment amount information
  • the base station may estimate the difference between the narrowband signal RSRP and the wideband signal RSRP by using the channel dissimilarity, calculate and send the access compensation adjustment amount information, and make up the narrowband signal.
  • RRM measurement is not accurate;
  • Step S404 the terminal receives and obtains an open loop power control parameter, and determines a transmit power of the uplink random access signal.
  • the open loop power control parameter includes maximum transmit power information, target receive power information, deviation information of different preamble type power requirements, access times information, power increment step information, and compensation adjustment amount information;
  • the terminal is used for base station selection based on the synchronization signal/synchronization channel reception power and the access compensation adjustment amount information;
  • Step S405 the terminal sends an uplink random access signal.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • a method for open loop power control is provided. As shown in FIG. 9, the process includes the following steps:
  • Step S501 the base station 1 transmits a new discovery reference signal N-DRS
  • base station 1 is a base station using a new RAT system
  • the newly discovered reference signal N-DRS is a narrowband signal/channel, and only part of the downlink bandwidth is used for transmission;
  • Step S502 the terminal measures the received power of the newly discovered reference signal N-DRS, and obtains the transmit power of the newly discovered reference signal N-DRS according to the newly discovered reference signal N-DRS ID lookup table;
  • the terminal detects the newly discovered reference signal N-DRS for establishing downlink synchronization with the base station 1 and acquiring the received power of the newly discovered reference signal N-DRS;
  • the transmit power information of the newly discovered reference signal N-DRS is obtained according to the newly discovered reference signal N-DRS ID lookup table.
  • different new discovery reference signals N-DRS ID correspond to different transmit power levels, for example,
  • the newly discovered reference signal N-DRS ID1 corresponds to a transmission power of 21 dBm
  • the newly discovered reference signal N-DRS ID2 corresponds to a transmission power of 21 dBm
  • the N-DRS ID3 corresponds to a transmit power of 24 dBm
  • the newly discovered reference signal N-DRS ID4 corresponds to a transmit power of 24 dBm
  • the newly discovered reference signal N-DRS ID5 corresponds to a transmit power of 27 dBm;
  • Step S503 the base station 2 sends an access configuration set, and the access configuration set carries the open loop power parameter.
  • the access configuration set includes multiple sets of access configuration messages, and different new discovery reference signals N-DRS IDs correspond to different access configuration messages;
  • the base station 2 is a base station using an LTE system
  • Step S504 the terminal receives and obtains an open loop power control parameter, calculates a downlink path loss, and determines a transmit power of the uplink random access signal;
  • the open loop power control parameter includes maximum transmit power information, target received power information, and compensation adjustment amount information;
  • Step S505 the terminal sends an uplink random access signal.
  • a method for open loop power control is provided. As shown in FIG. 10, the process includes the following steps:
  • Step S601 the base station 1 transmits a synchronization signal/synchronization channel
  • base station 1 is a base station using a new RAT system
  • the synchronization signal/synchronization channel is a narrowband signal/channel, and only part of the downlink bandwidth is used for transmission;
  • Step S602 the terminal measures the received power of the synchronization signal/synchronization channel, obtains the transmission power of the synchronization signal/channel according to the synchronization signal/synchronization channel ID lookup table, calculates the downlink path loss, and simultaneously receives the broadcast according to the synchronization signal/synchronization channel ID indication.
  • the signal is also a set of access configurations;
  • the terminal detects the synchronization signal/synchronization channel for establishing downlink synchronization with the base station, and simultaneously The received power of the synchronization signal/synchronization channel can be obtained;
  • the received power of the synchronization signal/synchronization channel is the received power of the signal after higher layer filtering
  • the transmit power information of the discovery reference signal is obtained according to the synchronization signal/synchronization channel ID lookup table.
  • different discovery reference signal IDs correspond to different transmit power levels, for example, the reference transmit signal ID1 corresponds to a transmit power of 21 dBm. It is found that the reference signal ID2 corresponds to the transmission power of 21 dBm, and the reference signal ID3 is found to correspond to the transmission power of 24 dBm, and the reference signal ID4 is found to correspond to the transmission power of 27 dBm;
  • the receiving broadcast signal or the access configuration set is indicated according to the synchronization signal/synchronization channel ID.
  • the different synchronization signal/synchronization channel ID may correspond to different indication identifier bits, for example, the synchronization signal/synchronization channel ID2 corresponding indication identifier. If the bit is 1, it indicates that the terminal needs to receive the broadcast signal/broadcast channel of the base station 1, and step S603a is performed.
  • the synchronization signal/synchronization channel ID1 corresponding indication flag is 0, indicating that the terminal needs to go to the base station 2 to obtain the access configuration set, and step S603b is performed. ;
  • Step S603a the base station 1 transmits a broadcast signal/channel, and the broadcast signal/broadcast channel carries the transmit power of the synchronization signal/channel and the open loop power parameter;
  • the broadcast signal/broadcast channel is consistent with the transmission period/frequency of the synchronization signal/synchronization channel, that is, transmitting a synchronization signal/synchronization channel corresponding to transmitting a broadcast signal/broadcast channel;
  • the time domain and or the frequency domain resource position occupied by the broadcast signal/broadcast channel are in a fixed positional relationship with the time domain and the frequency domain resource location occupied by the synchronization signal/synchronization channel, for example, a synchronization signal/
  • the synchronization channel is transmitted on the nth subframe, and the broadcast signal/broadcast channel is transmitted on the n+4 subframe;
  • Step S603b the base station 2 sends an access configuration set, and the access configuration set carries the open loop power parameter.
  • the access configuration set includes multiple sets of access configuration messages, and different synchronization signals/synchronization channel IDs correspond to different access configuration messages;
  • base station 2 is a base station using a new RAT system
  • Step S604 the terminal receives and obtains the transmit power of the synchronization signal/synchronization channel and the open loop power control parameter, and determines the transmit power of the uplink random access signal;
  • Step S605 the terminal sends an uplink random access signal.
  • a method for open loop power control is provided. As shown in FIG. 11, the process includes the following steps:
  • Step S701 the base station sends a synchronization signal/synchronization channel and CRS (Cell-specific Reference Signals);
  • the synchronization signal/synchronization channel is a narrowband signal narrowband/channel, and only part of the downlink bandwidth is used for transmission;
  • the CRS is a broadband signal, and the discrete or continuous distribution is performed on all downlink bandwidths;
  • Step S702 the terminal measures to obtain the received power of the CRS.
  • the terminal detects the synchronization signal/synchronization channel for establishing downlink synchronization with the base station;
  • the received power of the CRS is the received power of the signal after the higher layer filtering
  • Step S703 the base station sends a broadcast signal/broadcast channel, and the broadcast signal/broadcast channel carries the transmit power of the CRS and the open loop power parameter;
  • the broadcast signal/broadcast channel can be transmitted along with the synchronization signal/channel, that is, the transmission period/frequency is consistent, and transmitting a synchronization signal/synchronization channel is accompanied by transmitting a broadcast signal/broadcast channel;
  • the time domain and or the frequency domain resource position occupied by the broadcast signal/broadcast channel are fixed;
  • the base station sends the broadcast signal/channel to use the same beam direction as the transmitting CRS;
  • Step S704 the terminal receives and obtains the transmit power and the open loop power control parameter of the CRS, calculates the downlink path loss, and determines the transmit power of the uplink random access signal.
  • Step S705 the terminal sends an uplink random access signal.
  • a method for open loop power control is provided. As shown in FIG. 12, the process includes the following steps:
  • Step S801 the base station 1 transmits a new discovery reference signal N-DRS and a CSI-RS (Channel-state Information Reference Signals);
  • base station 1 is a base station using a new RAT system
  • the newly discovered reference signal N-DRS is a narrowband signal/narrowband channel, and only part of the downlink bandwidth is used for transmission;
  • the CSI-RS is a broadband signal, and the discrete distribution is transmitted on all downlink bandwidths;
  • Step S802 the terminal measures the received power of the CSI-RS.
  • the terminal detects a newly discovered reference signal N-DRS for establishing downlink synchronization with the base station 1;
  • the received power of the CSI-RS is a signal received power after being filtered by the upper layer
  • Step S803 the base station 2 sends an access configuration set, and the access configuration set carries the transmit power and the open loop power parameter of the CSI-RS.
  • the access configuration set includes multiple sets of access configuration messages, and different new discovery reference signals N-DRS IDs correspond to different access configuration messages;
  • the base station 2 is a base station using an LTE system
  • the access configuration set may further include the quantity information of the base station that can be used for terminal random access by using the new RAT system;
  • Step S804 the terminal receives and obtains the transmit power and the open loop power control parameter of the CSI-RS, calculates the downlink path loss, and determines the transmit power of the uplink random access signal.
  • the terminal may further control the transmit power of the uplink random access signal according to the quantity information of the base station that can be used for the terminal random access by using the new RAT system. For example, if the value is large, the terminal may appropriately reduce the random transmission of the power transmission.
  • Incoming signal
  • Step S805 the terminal sends an uplink random access signal.
  • a method for open loop power control is provided. As shown in FIG. 13, the process includes the following steps:
  • Step S901 the base station 1 transmits a synchronization signal/synchronization channel and a CRS;
  • base station 1 is a base station using a new RAT system
  • the synchronization signal/synchronization channel is a narrowband signal/narrowband channel, and only part of the downlink bandwidth is used for transmission;
  • the CRS is a broadband signal, and the discrete or continuous distribution is performed on all downlink bandwidths;
  • Step S902 the terminal measures to obtain the received power of the CRS, and receives the broadcast signal or the access configuration set according to the synchronization signal/synchronization channel indication;
  • the terminal detects the synchronization signal/synchronization channel for establishing downlink synchronization with the base station 1;
  • the received power of the CRS is the received power of the signal after the higher layer filtering
  • step S903a by indicating a bit in the synchronization signal/synchronization channel sequence, for example, the last bit of the synchronization signal/synchronization channel sequence, if the bit is 1 indicating that the terminal needs to receive the broadcast signal/broadcast channel of the base station 1, step S903a is performed. If it is 0, it indicates that the terminal needs to go to the base station 2 to obtain the access configuration set, and step S903b is performed;
  • Step S903a the base station 1 transmits a broadcast signal/broadcast channel, and the broadcast signal/broadcast channel carries the transmit power of the CRS and the open loop power parameter;
  • the broadcast signal/broadcast channel has a multiple relationship with the transmission period/frequency of the synchronization signal/synchronization channel, and one synchronization signal/synchronization channel is transmitted correspondingly to transmit a plurality of broadcast signals/broadcast channels;
  • the time domain and or the frequency domain resource position occupied by the broadcast signal/broadcast channel are in a fixed positional relationship with the time domain and the frequency domain resource location occupied by the synchronization signal/synchronization channel, for example, a synchronization signal/
  • the synchronization channel is transmitted on the nth subframe, and the broadcast signal/broadcast channel is transmitted on the n+3 subframe;
  • Step S903b the base station 2 sends an access configuration set, and the access configuration set carries the CRS transmit power and the open loop power parameter;
  • the access configuration set includes multiple sets of access configuration messages, and different synchronization signals/synchronization channel IDs correspond to different access configuration messages;
  • the base station 2 is a base station using an LTE system
  • Step S904 the terminal receives and obtains the transmit power of the CRS and the open loop power control parameter, and calculates Determining the transmit power of the uplink random access signal;
  • Step S905 the terminal sends an uplink random access signal.
  • the method and apparatus for the open loop power control relate to the field of wireless communications, including: transmitting a first signal/channel to a second wireless node; and indicating a transmit power of the first signal/channel of the second wireless node; Or transmitting a first signal/channel and a fourth signal/channel to the second wireless node; indicating a transmit power of the fourth signal/channel of the second wireless node; the transmit power is used by the second wireless node to calculate
  • the path loss and the transmit power of the uplink random access signal are determined. It can ensure that the uplink random access request is sent by using the appropriate transmit power in the user-centric access scenario, thereby resisting the influence of the path loss and avoiding the interference between the uplink users.

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Abstract

本文公布了一种本发明实施例提出的开环功率控制的方法和装置,涉及无线通信领域,包括:向第二无线节点发送第一信号/信道;指示第二无线节点所述第一信号/信道的发射功率;或者,向第二无线节点发送第一信号/信道和第四信号/信道;指示第二无线节点所述第四信号/信道的发射功率;所述发射功率用于所述第二无线节点计算下行路损和确定上行随机接入信号的发射功率。能够保证在以用户为中心的接入场景下使用合适的发射功率发送上行随机接入请求,从而抵抗路损影响及避免上行用户间干扰。

Description

一种开环功率控制的方法及装置 技术领域
本发明实施例涉及无线通信领域,具体涉及一种开环功率控制的方法和装置。
背景技术
目前,移动通信的主要需求来自移动互联网的发展,特别是智能终端的发展激发了移动通信数据业务量的猛增。面向2020年及未来,移动互联网和物联网业务将成为移动通信发展的主要驱动力。第三代合作伙伴项目(3GPP,3rd Generation Partnership Project)在高级长期演进系统(LTE-A,Long-Term Evolution Advance)提出异构网络(Heterogeneous Networks),并引入了Small cell(小小区)增强的功能。但一般都假设Small cell在一个宏基站同覆盖下不超过4个或10个,这个密度相对于未来10年的容量需求,是远远不够的。第五代移动通信技术(5G,5rd Generation)中提出了提升频谱效率、提高网络密度、增加系统带宽、智能业务分流、降低系统广播控制开销等需求。超密集网络(UDN,Ultra Dense Network)正是在这一背景下提出的。在UDN网络中,传输节点(TP,Transmit Point)密度非常大(一个宏站内包括几十到几百个小站)。TP的覆盖范围也进一步缩小(几十米,甚至十几米),每个TP可能只服务一个或几个用户,没有用户的TP进入休眠或关闭状态。因此,5G系统需要考虑以用户为中心的接入方式,在用户有需求时才响应,来达到实现基站节能和减少小区间干扰的目的。
对传统的长期演进系统(LTE,Long-Term Evolution)网络,小区发现和用户接入机制如下:每个小区都需要以5ms周期发射主同步信道(PSS,Primary Synchronization Signal)和辅同步信道(SSS,Secondary Synchronization Signal),用户设备(UE,User Equipment)检测同步信道获得同步和小区标识;每个小区在每个1ms子帧的多个符号上发射公共参考信号(CRS,Cell-specific Reference Signal),用户测量CRS得到参考信号接受功率(RSRP,Reference Signal Received Power)选择服务小区;每个小区以10ms周期通过物理广播信道(PBCH,Physical Broadcast Channel)向小区内 所有UE广播系统信息(MIB,Master Information Block),以及高频度发射带有系统信息(SIB,System Information Block)的下行数据信道(PDSCH,Physical Downlink Shared Channel);UE成功检测到这些系统信息后,获得上行接入信息,然后进行上行接入。可以看到,这些公共信道/信号的发射频度较高,占用资源开销很大并且会对邻区会产生较大的干扰。
在3GPP Release12small cell中,引入了小区发现信号(DRS,Discovery Reference Signal)和小小区开/关(small cell on/off)机制来减少功率开销和减少小区间干扰。如果没有业务需求,small cell使用40ms或以上的周期发射DRS信号,并关闭其他信号发送。当终端检测到DRS后,small cell才打开正常的信号发射、进行业务传输。通过这种机制可以节省非业务期间的功率,减少对邻区的干扰。但这种机制存在两个问题:第一是终端检测到DRS后需要通知宏站并由宏站唤醒small cell。对5G系统,假设系统孤立组网,则不能依赖于以前的网络,这种唤醒机制不可用。第二是DRS本身是传统CRS和PSS/SSS信号的结合,虽然发送频率受到了限制,但是这几种信号本身仍然是周期性的,功率开销比较大,实际上不需要读取CRS和PSS/SSS时,这些功率都浪费了,需要进一步考虑缩减相关信号的发射比例。
由此,现有的小区发现和接入机制难以支持UDN超密集网络,也不满足5G降低系统开销、以用户为中心的需求,无法达到绿色节能的效果。因此,5G新的无线接入技术(RAT,Radio Access Technology)系统需要考虑以终端为中心的接入方式,实现终端的快速接入,同时降低公共信号/信道的种类,减少公共信号的发送频率,大幅缩减基站的发射功率,达到基站绿色节能的目的。
为了解决上述问题,可以通过新发现参考信号(N-DRS,New Discovery Reference Signal)实现小区发现及同步,类似于LTE系统中的同步信道,可以窄带低密度发送,且发送周期可以更长;终端进一步获取一些必要的接入配置信息,接入配置信息可以通过DRS信号的载荷payload获取,或者通过LTE系统的基站辅助获取,或者通过广播信号/广播信道获取,终端获得接入配置信息后即可发起上行随机接入请求。载荷payload不同于广播信号/广 播信道,载荷payload可以理解为N-DRS信号的一部分,即N-DRS信号包括DRS序列及载荷payload两部分组成。
但是上述过程减少了CRS及SIB消息部分,那么,终端到底应该以多大的发射功率发射上行随机接入请求是不知道的?从而需要一种开环功率控制的方法用于抵抗路损,同时避免上行用户间的干扰。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
有鉴于此,本发明实施例提供一种开环功率控制的方法和装置,能够保证在以用户为中心的接入场景下使用合适的发射功率发送上行随机接入请求,从而抵抗路损影响及避免上行用户间干扰。
本发明实施例提供了一种开环功率控制的方法,应用于第一无线节点,包括:向第二无线节点发送第一信号/第一信道;
指示第二无线节点所述第一信号/第一信道的发射功率;或者,
向第二无线节点发送第一信号/第一信道和第四信号/第四信道;
指示第二无线节点所述第四信号/第四信道的发射功率;
所述发射功率用于所述第二无线节点计算下行路损和确定上行发射功率。
可选地,指示第二无线节点所述第一信号/第一信道的发射功率包括以下至少之一:
所述第一信号/第一信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式;
所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID存在映射关系。
可选地,指示第二无线节点所述第四信号/第四信道的发射功率包括以下 至少之一:
所述第四信号/信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
所述第一信号/第一信道指示所述第四信号/第四信道的发射功率的获取方式。
可选地,所述第二信号/第二信道或者所述第三信号/第三信道中包括:开环功率控制参数。
可选地,所述第二信号/第二信道的发送周期和/或频率与所述第一信号/第一信道的发送周期和/或频率相同,或者,所述第二信号/第二信道的发送周期和/或频率与所述第一信号/第一信道的发送周期和/或频率存在倍数关系。
可选地,发送所述第二信号/第二信道时所占的时域和/或频域资源位置在固定的物理资源上,或者,发送所述第二信号/第二信道时所占的时域和/或频域资源位置与发送所述第一信号/第一信道发送时所占的时域和/或频域资源位置存在对应的位置关系。
可选地,所述第三信号/信道中包括一套或者多套接入配置消息,所述接入配置消息中承载了使用所述接入配置消息的所述第一无线节点发送所述第一信号/信道的发射功率或者第四信号/信道的发射功率。
可选地,所述第三信号与所述第一信号/第一信道由不同的第一无线节点发送。
可选地,所述不同的所述第一无线节点为:不同系统下的所述第一无线节点;
所述不同系统为全球移动通信系统GSM、长期演进LTE、通用移动通信系统UMTS、新无线接入类型New RAT中的一种。
可选地,所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式包括:
由所述第一信号/第一信道指示所述第一无线节点发送所述第一信号/第一信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述 第三信号/第三信道中。
可选地,所述第一信号/信道指示所述第四信号/第四信道的发射功率的获取方式包括:
由所述第一信号/第一信道指示所述第一无线节点发送所述第四信号/第四信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
可选地,所述第一信号/第一信道用于同步和/或小区发现,且占用部分下行带宽发送;
所述第四信号/第四信道离散或者连续的在下行全部带宽上发送。
可选地,所述开环功率控制参数包括以下至少之一:最大发射功率信息、目标接收功率信息、不同前导序列类型功率需求的偏差信息、接入次数信息、功率递增的步长信息、补偿调整量信息。
可选地,所述补偿调整量信息用于对路损进行补偿,或者,用于对上行发射功率进行补偿。
可选地,发送所述第四信号/第四信道使用的波束方向与发送所述第二信号/第二信道使用的波束方向相同。
可选地,所述第二信号/第二信道或者所述第三信号/第三信道还包括:接入补偿调整量信息和/或所述第一无线节点数量信息。
本发明实施例还提供了一种开环功率控制的方法,应用于第二无线节点,包括:
接收第一无线节点发送的第一信号/第一信道并测量获得所述第一信号/第一信道的接收功率;
获得所述第一信号/第一信道的发射功率和/或开环功率控制参数;或者,
接收第一无线节点发送的第四信号/第四信道并测量获得所述第四信号/第四信道的接收功率;
获得所述第四信号/第四信道的发射功率和/或开环功率控制参数;
计算下行路损和确定上行发射功率。
可选地,接收所述第一无线节点发送的所述第一信号/第一信道或者所述第四信号/第四信道的发射功率和/或开环功率控制参数包括:
在第二信号/第二信道或者第三信号/第三信道中获取所述第一无线节点发送的所述第一信号/第一信道或者所述第四信号/第四信道的发射功率,或者,根据所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID的映射关系获取所述第一无线节点发送的所述第一信号/第一信道的发射功率;和/或,
在第二信号/第二信道或者第三信号/第三信道中获取开环功率控制参数。
可选地,所述第二信号/第二信道的接收周期和/或频率与所述第一信号/第一信道的接收周期和/或频率相同,或者,所述第二信号/第二信道的接收周期和/或频率与所述第一信号/第一信道的接收周期和/或频率存在倍数关系。
可选地,接收所述第二信号/第二信道时所占的时域和/或频域资源位置在固定的物理资源上,或者,接收所述第二信号/第二信道时所占的时域和/或频域资源位置与接收所述第一信号/第一信道发送时所占的时域和/或频域资源位置存在对应的位置关系。
可选地,所述开环功率控制参数包括以下至少之一:最大发射功率信息、目标接收功率信息、不同前导序列类型功率需求的偏差信息、接入次数信息、功率递增的步长信息、补偿调整量信息。
可选地,所述补偿调整量信息用于对路损进行补偿,或者,用于对上行发射功率进行补偿。
可选地,所述计算下行路损包括:
根据所述第一信号/第一信道或者所述第四信号/第四信道的接收功率与所述第一信号/第一信道或者所述第四信号/第四信道的发射功率和/或开环功率控制参数计算下行路损。
可选地,按照如下公式计算所述下行路损PL:
PL=P1Tx-P1RX或者,PL=P2Tx-P2RX
或者,PL=P1Tx-P1RX+Δβ或者,PL=P2Tx-P2RX+Δβ
其中,PL表示路径损耗,P1Tx表示所述第二无线节点接收所述第一无线节点发送所述第一信号/信道使用的发射功率;P1RX表示所述第二无线节点测量获得所述第一信号/PL信道的接收功率;P2Tx表示所述第二无线节点接收所述第一无线节点发送所述第四信号/第四信道使用的发射功率;P2RX表示所述第二无线节点测量获得所述第四信号/第四信道的接收功率;Δβ表示补偿调整量。
可选地,所述上行发射功率包括上行随机接入信号的发射功率;
确定所述上行随机接入信号的发射功率包括:根据下行路损和/或开环功率控制参数计算确定上行随机接入信号的发射功率。
可选地,按照如下公式计算所述上行随机接入信号的发射功率PRACH
PRACH=min(Pmax,P0+PL)
或者,PRACH=min(Pmax,P0+PL+Δβ)
其中,Pmax表示所述第二无线节点的最大发射功率,P0表示目标接收功率,Δβ表示补偿调整量,PL表示路径损耗;PRACH表示上行随机接入信号的发射功率。
可选地,获得所述第一信号/第一信道的接收功率包括:
对测量获得所述第一信号/第一信道的接收功率进行高层滤波;
获得滤波后的接收功率。
可选地,获得所述第一信号/第一信道的发射功率还包括:接收所述第一无线节点发送的接入补偿调整量信息;所述接入补偿调整量信息用于所述第二无线节点选择所述第一无线节点。
可选地,所述第二无线节点选择所述第一无线节点包括:
所述第二无线节点基于所述第一无线节点的接收功率和接入补偿调整量信息估计宽带信号接收功率,选择所述第一无线节点。
可选地,计算下行路损和确定上行随机接入信号的发射功率之前还包括:
接收所述第一无线节点发送的所述第一无线节点的数量信息;
参考数量信息确定上行随机接入信号的发射功率。
本发明实施例有提供了一种开环功率控制的装置,设置于第一无线节点,包括:
第一发送模块,设置为向第二无线节点发送第一信号/第一信道;
第一指示模块,设置为指示第二无线节点所述第一信号/第一信道的发射功率;或者,
第二发送模块,设置为向第二无线节点发送第一信号/第一信道和第四信号/第四信道;
第二指示模块,设置为指示第二无线节点所述第四信号/第四信道的发射功率;
所述发射功率用于所述第二无线节点计算下行路损和确定上行发射功率。
可选地,所述第一指示模块指示第二无线节点所述第一信号/第一信道的发射功率包括以下至少之一:
所述第一信号/第一信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式;
所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID存在映射关系。
可选地,所述第二指示模块指示第二无线节点所述第四信号/第四信道的发射功率包括以下至少之一:
所述第四信号/第四信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
所述第一信号/第一信道指示所述第四信号/第四信道的发射功率的获取方式。
可选地,所述第一指示模块的所述第一信号/第一信道指示所述第一信号 /第一信道的发射功率的获取方式包括:
由所述第一信号第一/信道指示所述第一无线节点发送所述第一信号/第一信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
可选地,所述第二指示模块的所述第一信号/第一信道指示所述第四信号/第四信道的发射功率的获取方式包括:
由所述第一信号/第一信道指示所述第一无线节点发送所述第四信号/第四信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
可选地,所述第一发送模块,还设置为所述第一信号/第一信道用于同步和或小区发现占用部分下行带宽发送;
所述第二发送模块,还设置为所述第四信号/第四信道离散或者连续的在下行全部带宽上发送。
可选地,所述第二发送模块发送所述第四信号/第四信道使用的波束方向与发送所述第二信号/第二信道使用的波束方向相同。
本发明实施例还提供了一种开环功率控制的装置,设置于第二无线节点,包括:
第一接收模块,设置为接收第一无线节点发送的第一信号/第一信道并测量获得所述第一信号/第一信道的接收功率;
第一功率模块,设置为获得所述第一信号/第一信道的发射功率和/或开环功率控制参数;或者,
第二接收模块,设置为接收第一无线节点发送的第四信号/第四信道并测量获得所述第四信号/第四信道的接收功率;
第二功率模块,设置为获得所述第四信号/第四信道的发射功率和/或开环功率控制参数;
计算模块,设置为计算下行路损和确定上行发射功率。
可选地,所述第一功率模块获得所述第一信号/第一信道或所述第二功率 模块获得所述第四信号/第四信道的发射功率和/或开环功率控制参数包括:
在第二信号/第二信道或者第三信号/第三信道中获取所述第一无线节点发送的所述第一信号/第一信道或者所述第四信号/第四信道的发射功率,或者,根据所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID的映射关系获取所述第一无线节点发送的所述第一信号/第一信道的发射功率;和/或,
在第二信号/第二信道或者第三信号/第三信道中获取开环功率控制参数。
可选地,所述计算模块计算下行路损包括:
根据所述第一信号/第一信道或者所述第四信号/第四信道的接收功率与所述第一信号/第一信道或者所述第四信号/第四信道的发射功率和/或开环功率控制参数计算下行路损。
可选地,所述计算模块按照如下公式计算所述下行路损PL:
PL=P1Tx-P1RX或者,PL=P2Tx-P2RX
或者,PL=P1Tx-P1RX+Δβ或者,PL=P2Tx-P2RX+Δβ
其中,PL表示路径损耗,P1Tx表示所述第二无线节点接收所述第一无线节点发送所述第一信号/信道使用的发射功率;P1RX表示所述第二无线节点测量获得所述第一信号/信道的接收功率;P2Tx表示所述第二无线节点接收所述第一无线节点发送所述第四信号/第四信道使用的发射功率;P2RX表示所述第二无线节点测量获得所述第四信号/第四信道的接收功率;Δβ表示补偿调整量。
可选地,所述上行发射功率包括上行随机接入信号的发射功率;
所述计算模块确定发射功率包括:根据下行路损和/或开环功率控制参数计算确定上行随机接入信号的发射功率。
可选地,所述计算模块按照如下公式计算所述上行随机接入信号的发射功率PRACH
PRACH=min(Pmax,P0+PL)
或者,PRACH=min(Pmax,P0+PL+Δβ)
其中,Pmax表示所述第二无线节点的最大发射功率,P0表示目标接收功率,Δβ表示补偿调整量,PL表示路径损耗;PRACH表示上行随机接入信号的发射功率。
可选地,所述第一功率模块获得所述第一信号/第一信道的接收功率包括:
对测量获得所述第一信号/第一信道的接收功率进行高层滤波;
获得滤波后的接收功率。
可选地,所述第一功率模块获得所述第一信号/第一信道的发射功率还包括:接收所述第一无线节点发送的接入补偿调整量信息;所述接入补偿调整量信息用于所述第二无线节点选择所述第一无线节点。
可选地,所述第一功率模块的所述第二无线节点选择所述第一无线节点包括:
所述第二无线节点基于所述第一无线节点的接收功率和接入补偿调整量信息估计宽带信号接收功率,选择所述第一无线节点。
可选地,还包括:
第三接收模块,设置为接收所述第一无线节点发送的所述第一无线节点的数量信息;
确定模块,设置为参考数量信息确定上行随机接入信号的发射功率。
本发明实施例又提供了一种计算机可读存储介质,存储有计算机可执行指令,所述计算机可执行指令用于执行上述任一项所述的开环功率控制的方法。
本发明和现有技术相比,具有如下有益效果:
能够保证在以用户为中心的接入场景下使用合适的发射功率发送上行随机接入请求,从而抵抗路损影响及避免上行用户间干扰。
在阅读并理解了附图和详细描述后,可以明白其他方面。
附图概述
此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:
图1是本发明实施例中一种开环功率控制的方法的流程图;
图2是本发明实施例中另一种开环功率控制的方法的流程图;
图3是本发明实施例中一种开环功率控制的装置的结构示意图;
图4是本发明实施例中另一种开环功率控制的装置的结构示意图;
图5是本发明实施例1的开环功率控制方法的流程图;
图6是本发明实施例2的开环功率控制方法的流程图;
图7是本发明实施例3的开环功率控制方法的流程图;
图8是本发明实施例4的开环功率控制方法的流程图;
图9是本发明实施例5的开环功率控制方法的流程图;
图10是本发明实施例6的开环功率控制方法的流程图;
图11是本发明实施例7的开环功率控制方法的流程图;
图12是本发明实施例8的开环功率控制方法的流程图;
图13是本发明实施例9的开环功率控制方法的流程图;
图14是本发明实施例同步信号/信道ID与同步信号/信道的发射功率信息图;
图15是本发明实施例同步信号/信道ID与发现参考信号的发射功率信息图。
本发明的较佳实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。
为使本发明的发明目的、技术方案和有益效果更加清楚明了,下面结合附图对本发明的实施例进行说明,需要说明的是,在不冲突的情况下,本申 请中的实施例和实施例中的特征可以相互任意组合。
如图1所示,一种开环功率控制的方法,应用于第一无线节点,包括:
向第二无线节点发送第一信号/第一信道;
指示第二无线节点所述第一信号/第一信道的发射功率;或者,
向第二无线节点发送第一信号/第一信道和第四信号/第四信道;
指示第二无线节点所述第四信号/第四信道的发射功率;
所述发射功率用于所述第二无线节点计算下行路损和确定上行随机接入信号的发射功率。
其中,指示第二无线节点所述第一信号/第一信道的发射功率包括以下至少之一:
所述第一信号/第一信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式;
所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID存在映射关系。
其中,指示第二无线节点所述第四信号/第四信道的发射功率包括以下至少之一:
所述第四信号/第四信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
所述第一信号/第一信道指示所述第四信号/第四信道的发射功率的获取方式。
所述第一信号/第一信道包括同步信号或同步信道。
所述第四信号/第四信道包括:公共参考信号(CRS)或者信道状态信息参考信号(CSI-RS)。
所述第二信号/第二信道包括物理广播信道(PBCH)或者所述第一信号的承载payload信息。
所述第三信号/第三信道包括接入配置集合。
第一无线节点(基站)发送同步信号/同步信道,所述同步信号/同步信道的发射功率承载在PBCH中发送,或者,所述同步信号/同步信道的发射功率承载在接入配置集合中发送,或者,所述同步信号/同步信道指示所述同步信号/同步信道的发射功率的获取方式,或者,所述同步信号/同步信道的发射功率与所述同步信号/同步信道的ID存在映射关系;
或者,第一无线节点(基站)发送同步信号/同步信道和CRS,所述CRS的发射功率承载在PBCH中发送,或者,所述CRS的发射功率承载在接入配置集合中发送,或者,所述同步信号/同步信道指示所述CRS的发射功率的获取方式;
所述第二信号/第二信道或者所述第三信号/第三信道中包括:开环功率控制参数。其中,开环功率控制参数用于对所述第二无线节点(UE)的上行进行功率调整,可以包括一下至少之一:最大发射功率信息、目标接收功率信息、不同前导序列类型需求的偏差信息、接入次数信息、功率递增的步长信息、补偿调整量信息等。
所述第二信号/第二信道的发送周期和/或频率与所述第一信号/第一信道的发送周期和/或频率相同,或者,所述第二信号/第二信道的发送周期和/或频率与所述第一信号/第一信道的发送周期和/或频率存在倍数关系。
发送所述第二信号/第二信道时所占的时域和/或频域资源位置在固定的物理资源上,或者,发送所述第二信号/第二信道时所占的时域和/或频域资源位置与发送所述第一信号/第一信道发送时所占的时域和/或频域资源位置存在对应的位置关系。
所述第三信号/第三信道中包括一套或者多套接入配置消息,所述接入配置消息中承载了使用所述接入配置消息的所述第一无线节点发送所述第一信号/第一信道的发射功率或者第四信号/第四信道的发射功率。
所述第三信号与所述第一信号/第一信道由不同的所述第一无线节点发送,所述不同的所述第一无线节点可以为不同系统下的,所述系统可以为全球移动通信系统(GSM,Global System for Mobile Communication)、LTE、通用移动通信系统(UMTS,Universal Mobile Telecommunications System) 或New RAT。
所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式包括:
由所述第一信号/第一信道指示所述第一无线节点发送所述第一信号/第一信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
所述第一信号/第一信道指示所述第四信号/第四信道的发射功率的获取方式包括:
由所述第一信号/第一信道指示所述第一无线节点发送所述第四信号/第四信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
所述第一信号/第一信道用于同步和/或小区发现,且占用部分下行带宽进行发送;
所述第四信号/第四信道离散或者连续的在下行全部带宽上发送。
所述开环功率控制参数包括以下至少之一:最大发射功率信息、目标接收功率信息、不同前导序列类型功率需求的偏差信息、接入次数信息、功率递增的步长信息、补偿调整量信息。
所述补偿调整量信息用于对路损进行补偿,或者,用于对上行发射功率进行补偿。
发送所述第四信号/第四信道使用的波束方向与发送所述第二信号/第二信道使用的波束方向相同。
所述第二信号/第二信道或者所述第三信号/第三信道还包括:接入补偿调整量信息和/或所述第一无线节点数量信息。
如图2所示,本发明实施例还提供一种开环功率控制的方法,应用于第二无线节点,包括:
接收第一无线节点发送的第一信号/第一信道并测量获得所述第一信号/第一信道的接收功率;
获得所述第一信号/第一信道的发射功率和/或开环功率控制参数;或者,
接收第一无线节点发送的第四信号/第四信道并测量获得所述第四信号/第四信道的接收功率;
获得所述第四信号第四/信道的发射功率和/或开环功率控制参数;
计算下行路损和确定上行随机接入信号的发射功率。
接收所述第一无线节点发送的所述第一信号/第一信道或者所述第四信号/第四信道的发射功率和/或开环功率控制参数包括:
在第二信号/第二信道或者第三信号/第三信道中获取所述第一无线节点发送的所述第一信号/第一信道或者所述第四信号/第四信道的发射功率,或者,根据所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID的映射关系获取所述第一无线节点发送的所述第一信号/第一信道的发射功率;和/或,
在第二信号/第二信道或者第三信号/第三信道中获取开环功率控制参数。
所述第二信号/第二信道的接收周期和/或频率与所述第一信号/第一信道的接收周期和/或频率相同,或者,所述第二信号/第二信道的接收周期和/或频率与所述第一信号/第一信道的接收周期和/或频率存在倍数关系。
接收所述第二信号/第二信道时所占的时域和/或频域资源位置在固定的物理资源上,或者,接收所述第二信号/第二信道时所占的时域和/或频域资源位置与接收所述第一信号/第一信道发送时所占的时域和/或频域资源位置存在对应的位置关系
所述开环功率控制参数包括以下至少之一:最大发射功率信息、目标接收功率信息、不同前导序列类型功率需求的偏差信息、接入次数信息、功率递增的步长信息、补偿调整量信息。
所述补偿调整量信息用于对路损进行补偿,或者,用于对上行发射功率进行补偿。
所述计算下行路损包括:
根据所述第一信号/第一信道或者所述第四信号/信道的接收功率与所述 第一信号/第一信道或者所述第四信号/第四信道的发射功率和/或开环功率控制参数计算下行路损。
按照如下公式计算下行路损:
PL=P1Tx-P1RX或者,PL=P2Tx-P2RX
或者,PL=P1Tx-P1RX+Δβ或者,PL=P2Tx-P2RX+Δβ
其中,PL表示路径损耗,P1Tx表示所述第二无线节点接收所述第一无线节点发送所述第一信号/第一信道使用的发射功率;P1RX表示所述第二无线节点测量获得所述第一信号/第一信道的接收功率;P2Tx表示所述第二无线节点接收所述第一无线节点发送所述第四信号/第四信道使用的发射功率;P2RX表示所述第二无线节点测量获得所述第四信号/第四信道的接收功率;Δβ表示补偿调整量。
确定上行随机接入信号的发射功率包括:根据下行路损和/或开环功率控制参数计算确定上行随机接入信号的发射功率。
按照如下公式计算上行随机接入信号的发射功率:
PRACH=min(Pmax,P0+PL)
或者,PRACH=min(Pmax,P0+PL+Δβ)
其中,Pmax表示所述第二无线节点的最大发射功率,P0表示目标接收功率,Δβ表示补偿调整量,PL表示路径损耗;PRACH表示上行随机接入信号的发射功率。
获得所述第一信号/第一信道的接收功率包括:
对测量获得所述第一信号/第一信道的接收功率进行高层滤波;
获得滤波后的接收功率。
所述高层滤波可以按照如下算法进行平滑,Fn=(1-a)·Fn-1+a·Mn,其中,Fn指本次平滑的结果,Fn-1指上一次平滑的结果,Mn指本次物理层上报的测量结果,a指平滑因子,第一次平滑时,F0=M1
获得所述第一信号/第一信道的发射功率还包括:接收所述第一无线节点发送的接入补偿调整量信息;所述接入补偿调整量信息用于所述第二无线节 点选择所述第一无线节点。
所述第二无线节点选择所述第一无线节点包括:
所述第二无线节点基于所述第一无线节点的接收功率和接入补偿调整量信息估计宽带信号接收功率,选择所述第一无线节点。
计算下行路损和确定上行随机接入信号的发射功率之前还包括:
接收所述第一无线节点发送的所述第一无线节点的数量信息;
参考数量信息确定上行随机接入信号的发射功率。
本发明实施例通过窄带信号N-DRS估计路损及测量RSRP,再加上一下必要的开环功率参数用于确定上行发射功率。LTE系统中是通过宽带信号CRS进行路损估计及测量RSRP的;CRS的干扰问题一直是LTE网络中比较严重的问题,为此在Rel-11阶段还专门在FeICIC议题进行讨论研究,通过窄带信号N-DRS代替CRS进行RSRP测量,可以降低干扰,提高系统设计前向兼容性;另外,路损估计需要获知信号的发射功率,LTE系统中是通过SIB消息传递CRS的发射功率信息,SIB消息承载在业务员信道中,因此需要为终端调度/分配资源用于SIB消息的传输,会增加了获取信息的时间,对于窄带信号估计路损,N-DRS的发射功率可以通过N-DRS信号的载荷payload中获取或者通过LTE系统的基站辅助获取或者通过广播信号/信道中获取,不管是N-DRS的发射功率信息承载在载荷payload还是广播信号/信道中,都是承载在物理信道上,相比于SIB消息,使用的资源及码率固定,可以使终端迅速获得N-DRS的发射功率信息,用于开环功控,快速地发起上行接入请求。
如图3所示,本发明实施例还提供一种开环功率控制的装置,设置于第一无线节点,包括:
第一发送模块,设置为向第二无线节点发送第一信号/第一信道;
第一指示模块,设置为指示第二无线节点所述第一信号/第一信道的发射功率;或者,
第二发送模块,设置为向第二无线节点发送第一信号/第一信道和第四信号/第四信道;
第二指示模块,设置为指示第二无线节点所述第四信号/第四信道的发射功率;
所述发射功率用于所述第二无线节点计算下行路损和确定上行随机接入信号的发射功率。
所述第一指示模块指示第二无线节点所述第一信号/第一信道的发射功率包括以下至少之一:
所述第一信号/第一信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式;
所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID存在映射关系。
所述第二指示模块指示第二无线节点所述第四信号/第四信道的发射功率包括以下至少之一:
所述第四信号/第四信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
所述第一信号/第一信道指示所述第四信号/第四信道的发射功率的获取方式。
所述第一指示模块的所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式包括:
由所述第一信号/第一信道指示所述第一无线节点发送所述第一信号/第一信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
所述第二指示模块的所述第一信号/第一信道指示所述第四信号/第四信道的发射功率的获取方式包括:
由所述第一信号/第一信道指示所述第一无线节点发送所述第四信号/第四信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
所述第一发送模块,还设置为所述第一信号/第一信道用于同步和或小区发现占用部分下行带宽发送;
所述第二发送模块,还设置为所述第四信号/第四信道离散或者连续的在下行全部带宽上发送。
所述第二发送模块发送所述第四信号/第四信道使用的波束方向与发送所述第二信号/第二信道使用的波束方向相同。
如图4所示,本发明实施例还提供一种开环功率控制的装置,设置于第二无线节点,包括:
第一接收模块,设置为接收第一无线节点发送的第一信号/第一信道并测量获得所述第一信号/第一信道的接收功率;
第一功率模块,设置为获得所述第一信号/第一信道的发射功率和/或开环功率控制参数;或者,
第二接收模块,设置为接收第一无线节点发送的第四信号/第四信道并测量获得所述第四信号/第四信道的接收功率;
第二功率模块,设置为获得所述第四信号/第四信道的发射功率和/或开环功率控制参数;
计算模块,设置为计算下行路损和确定上行随机接入信号的发射功率。
所述第一功率模块获得所述第一信号/第一信道或所述第二功率模块获得所述第四信号/第四信道的发射功率和/或开环功率控制参数包括:
在第二信号/第二信道或者第三信号/第三信道中获取所述第一无线节点发送的所述第一信号/第一信道或者所述第四信号/第四信道的发射功率,或者,根据所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID的映射关系获取所述第一无线节点发送的所述第一信号/第一信道的发射功率;和/或,
在第二信号/第二信道或者第三信号/第三信道中获取开环功率控制参数。
所述计算模块计算下行路损包括:
根据所述第一信号/第一信道或者所述第四信号/第四信道的接收功率与所述第一信号/第一信道或者所述第四信号/第四信道的发射功率和/或开环功率控制参数计算下行路损。
所述计算模块按照如下公式计算下行路损:
PL=P1Tx-P1RX或者,PL=P2Tx-P2RX
或者,PL=P1Tx-P1RX+Δβ或者,PL=P2Tx-P2RX+Δβ
其中,PL表示路径损耗,P1Tx表示所述第二无线节点接收所述第一无线节点发送所述第一信号/第一信道使用的发射功率;P1RX表示所述第二无线节点测量获得所述第一信号/第一信道的接收功率;P2Tx表示所述第二无线节点接收所述第一无线节点发送所述第四信号/第四信道使用的发射功率;P2RX表示所述第二无线节点测量获得所述第四信号/第四信道的接收功率;Δβ表示补偿调整量。
所述计算模块确定上行随机接入信号的发射功率包括:根据下行路损和/或开环功率控制参数计算确定上行随机接入信号的发射功率。
所述计算模块按照如下公式计算上行随机接入信号的发射功率:
PRACH=min(Pmax,P0+PL)
或者,PRACH=min(Pmax,P0+PL+Δβ)
其中,Pmax表示所述第二无线节点的最大发射功率,P0表示目标接收功率,Δβ表示补偿调整量,PL表示路径损耗;PRACH表示上行随机接入信号的发射功率。
所述第一功率模块获得所述第一信号/第一信道的接收功率包括:
对测量获得所述第一信号/第一信道的接收功率进行高层滤波;
获得滤波后的接收功率。
所述第一功率模块获得所述第一信号/第一信道的发射功率还包括:接收所述第一无线节点发送的接入补偿调整量信息;所述接入补偿调整量信息用于所述第二无线节点选择所述第一无线节点。
所述第一功率模块的所述第二无线节点选择所述第一无线节点包括:
所述第二无线节点基于所述第一无线节点的接收功率和接入补偿调整量信息估计宽带信号接收功率,选择所述第一无线节点。
所述的装置还包括:
第三接收模块,设置为接收所述第一无线节点发送的所述第一无线节点的数量信息;
确定模块,设置为参考数量信息确定上行随机接入信号的发射功率。
实施例一:
在本实施例中,提供一种开环功率控制的方法,如图5所示,该流程包括以下步骤:
步骤S101,基站发送同步信号/同步信道;
优选地,同步信号/同步信道为窄带信号/窄带信道,只占用部分下行带宽进行发送;
步骤S102,终端测量获取同步信号/同步信道的接收功率;
优选地,终端检测同步信号/同步信道用于与基站建立下行同步,获取同步信号/同步信道的接收功率;
优选地,同时可利用同步信号/同步信道进行信道估计,信道估计的结果可用于同步信号payload的解调;
步骤S103,基站发送同步信号payload,同步信号payload中携带了同步信号/同步信道的发射功率及开环功率参数;
优选地,同步信号payload可以理解为同步信号的一部分,即同步信号由同步序列加同步信号payload两部分组成;
优选地,同步信号payload可以伴随同步信号/信道进行发送,即发送周期/频率一致,发送一个同步信号/同步信道就伴随发送一个同步信号payload;
优选地,广播信号/广播信道发送时所占的时域和或频域资源位置固定;
步骤S104,终端接收并获得同步信号/同步信道的发射功率及开环功控 参数,计算下行路损,确定上行随机接入信号的发射功率;
优选地,开环功控参数包括最大发射功率信息、目标接收功率信息、补偿调整量信息;
优选地,根据公式PL=P1Tx-P1RX计算下行路损,其中P1Tx指基站发送同步信号/信道时使用的发射功率;P1RX指终端测量获得的同步信号/信道的接收功率;
优选地,根据公式PRACH=min(Pmax,P0+PL+Δβ)确定上行随机接入信号的发射功率,
其中,Pmax指终端的最大发射功率,P0指目标接收功率,Δβ指补偿调整量,是开环功率控制参数中的一种,用于对上行发射功率进行补偿;PL指路损;PRACH指上行随机接入信号的发射功率;
步骤S105,终端发送上行随机接入信号;
优选地,终端以PRACH发送上行随机接入信号。
实施例二:
在本实施例中,提供一种开环功率控制的方法,如图6所示,该流程包括以下步骤:
步骤S201,基站1发送同步信号/同步信道;
优选地,基站1为使用new RAT系统的基站;
优选地,同步信号/同步信道为窄带信号/信道,只占用部分下行带宽进行发送;
步骤S202,终端测量获取同步信号/同步信道的接收功率;
优选地,终端检测同步信号/同步信道用于与基站1建立下行同步,同时可获取同步信号/同步信道的接收功率;
步骤S203,基站2发送接入配置集合,接入配置集合中携带了同步信号/同步信道的发射功率及开环功率参数;
优选地,接入配置集合中包含多套接入配置消息,不同的同步信号/同步信道ID对应不同的接入配置消息;
优选地,基站2为使用LTE系统的基站;
步骤S204,终端接收并获得同步信号/同步信道的发射功率及开环功控参数,计算下行路损,确定上行随机接入信号的发射功率;
优选地,开环功控参数包括最大发射功率信息、目标接收功率信息、补偿调整量信息;
优选地,根据公式PL=P1Tx-P1RX+Δβ计算下行路损,其中P1Tx指基站发送同步信号/信道时使用的发射功率;P1RX指终端测量获得的同步信号/信道的接收功率;Δβ指补偿调整量,是开环功率控制参数中的一种,基站利用信道互异性估计同步信号/信道与随机接入信号频域位置信号强度的偏差,确定并发送补偿调整量Δβ,用于对路损进行补偿;
优选地,根据公式PRACH=min(Pmax,P0+PL)确定上行随机接入信号的发射功率,
其中,Pmax指终端的最大发射功率,P0指目标接收功率;PL指路损;PRACH指上行随机接入信号的发射功率;
步骤S205,终端发送上行随机接入信号;
优选地,终端以PRACH发送上行随机接入信号;
实施例三:
在本实施例中,提供一种开环功率控制的方法,如图7所示,该流程包括以下步骤:
步骤S301,基站1发送同步信号/同步信道;
优选地,基站1为使用new RAT系统的基站;
优选地,同步信号/信道为窄带信号/窄带信道,只占用部分下行带宽进行发送;
步骤S302,终端测量获取同步信号/同步信道的接收功率,根据同步信号/同步信道指示接收广播信号还是接入配置集合;
优选地,终端检测同步信号/同步信道用于与基站1建立下行同步,同时可获取同步信号/同步信道的接收功率;
优选地,通过同步信号/同步信道序列中某个bit位指示,例如同步信号/同步信道序列的最后一个bit,如果该bit为0表示需要终端接收基站1的广播信号/信道,执行步骤S303a,如果为1表示需要终端去基站2获得接入配置集合,执行步骤S303b;
步骤S303a,基站1发送广播信号/信道,广播信号/广播信道中携带了同步信号/同步信道的发射功率及开环功率参数;
优选地,广播信号/广播信道与同步信号/同步信道的发送周期/频率存在倍数关系,发送多个同步信号/同步信道对应发送一个广播信号/广播信道;
优选地,广播信号/广播信道发送时所占的时域和或频域资源位置与同步信号/同步信道发送时所占的时域和或频域资源位置存在固定的位置关系,例如同步信号/同步信道是在第n个子帧上发送,则广播信号/广播信道是在n+2子帧上进行发送;
步骤S303b,基站2发送接入配置集合,接入配置集合中携带了同步信号/同步信道的发射功率及开环功率参数;
优选地,接入配置集合中包含多套接入配置消息,不同的同步信号/同步信道ID对应不同的接入配置消息;
优选地,基站2为使用new RAT系统的基站;
步骤S304,终端接收并获得同步信号/同步信道的发射功率及开环功控参数,计算下行路损,确定上行随机接入信号的发射功率;
优选地,开环功控参数包括最大发射功率信息、目标接收功率信息、补偿调整量信息;
优选地,根据公式PL=P1Tx-P1RX+Δβ计算下行路损,其中P1Tx指基站发送同步信号/同步信道时使用的发射功率;P1RX指终端测量获得的同步信号/信道的接收功率;Δβ指补偿调整量,是开环功率控制参数中的一种,用于对路损进行补偿;
优选地,根据公式PRACH=min(Pmax,P0+PL)确定上行随机接入信号的发射功率,
其中,Pmax指终端的最大发射功率,P0指目标接收功率;PL指路损; PRACH指上行随机接入信号的发射功率;
步骤S305,终端发送上行随机接入信号;
优选地,终端以PRACH发送上行随机接入信号。
实施例四:
在本实施例中,提供一种开环功率控制的方法,如图8所示,该流程包括以下步骤:
步骤S401,基站发送同步信号/同步信道;
优选地,同步信号/同步信道为窄带信号/窄带信道,只占用部分下行带宽进行发送;
步骤S402,终端测量获取同步信号/同步信道的接收功率,根据同步信号/同步信道ID查表获得同步信号/信道的发射功率,计算下行路损;
优选地,终端检测同步信号/同步信道用于与基站建立下行同步,同时可获取同步信号/同步信道的接收功率;
优选地,根据同步信号/同步信道ID查表获得同步信号/信道的发射功率信息,如图14所示,不同的同步信号/同步信道ID对应不同发射功率等级,例如同步信号ID1对应发射功率为30dBm,
同步信号ID2对应发射功率27dBm,同步信号ID3对应发射功率24dBm;
优选地,根据公式PL=P1Tx-P1RX计算下行路损,其中P1Tx指基站发送同步信号/信道时使用的发射功率;P1RX指终端测量获得的同步信号/信道的接收功率;
步骤S403,基站发送广播信号/广播信道,广播信号/广播信道中携带了开环功率参数;
优选地,广播信号/广播信道可以伴随同步信号/同步信道进行发送,即发送周期/频率一致,发送一个同步信号/同步信道就伴随发送一个广播信号/广播信道;
优选地,广播信号/广播信道发送时所占的时域和或频域资源位置固 定;
优选地,广播信号/广播信道中还可以包括接入补偿调整量信息,基站可利用信道互异性估计窄带信号RSRP与宽带信号RSRP的差别,计算并发送接入补偿调整量信息,弥补窄带信号做RRM测量不准确的问题;
步骤S404,终端接收并获得开环功控参数,确定上行随机接入信号的发射功率;
优选地,开环功控参数包括最大发射功率信息、目标接收功率信息、不同preamble类型功率需求的偏差信息、接入次数信息、功率递增的步长信息、补偿调整量信息;
优选地,基于同步信号/同步信道接收功率及接入补偿调整量信息,终端可用于基站选择;
步骤S405,终端发送上行随机接入信号。
实施例五:
在本实施例中,提供一种开环功率控制的方法,如图9所示,该流程包括以下步骤:
步骤S501,基站1发送新发现参考信号N-DRS;
优选地,基站1为使用new RAT系统的基站;
优选地,新发现参考信号N-DRS为窄带信号/信道,只占用部分下行带宽进行发送;
步骤S502,终端测量获取新发现参考信号N-DRS的接收功率,根据新发现参考信号N-DRS ID查表获得新发现参考信号N-DRS的发射功率;
优选地,终端检测新发现参考信号N-DRS用于与基站1建立下行同步,同时可获取新发现参考信号N-DRS的接收功率;
优选地,根据新发现参考信号N-DRS ID查表获得新发现参考信号N-DRS的发射功率信息,如图14所示,不同的新发现参考信号N-DRS ID对应不同发射功率等级,例如新发现参考信号N-DRS ID1对应发射功率为21dBm,新发现参考信号N-DRS ID2对应发射功率21dBm,新发现参考信号 N-DRS ID3对应发射功率24dBm,新发现参考信号N-DRS ID4对应发射功率24dBm,新发现参考信号N-DRS ID5对应发射功率27dBm;
步骤S503,基站2发送接入配置集合,接入配置集合中携带了开环功率参数;
优选地,接入配置集合中包含多套接入配置消息,不同的新发现参考信号N-DRS ID对应不同的接入配置消息;
优选地,基站2为使用LTE系统的基站;
步骤S504,终端接收并获得开环功控参数,计算下行路损,确定上行随机接入信号的发射功率;
优选地,开环功控参数包括最大发射功率信息、目标接收功率信息、补偿调整量信息;
优选地,根据公式PL=P1Tx-P1RX+Δβ计算下行路损,其中P1Tx指基站发送新发现参考信号N-DRS时使用的发射功率;P1RX指终端测量获得的新发现参考信号N-DRS的接收功率;Δβ指补偿调整量,是开环功率控制参数中的一种,用于对路损进行补偿;
步骤S505,终端发送上行随机接入信号。
实施例六:
在本实施例中,提供一种开环功率控制的方法,如图10所示,该流程包括以下步骤:
步骤S601,基站1发送同步信号/同步信道;
优选地,基站1为使用new RAT系统的基站;
优选地,同步信号/同步信道为窄带信号/信道,只占用部分下行带宽进行发送;
步骤S602,终端测量获取同步信号/同步信道的接收功率,根据同步信号/同步信道ID查表获得同步信号/信道的发射功率,计算下行路损,同时可以根据同步信号/同步信道ID指示接收广播信号还是接入配置集合;
优选地,终端检测同步信号/同步信道用于与基站建立下行同步,同时 可获取同步信号/同步信道的接收功率;
优选地,同步信号/同步信道的接收功率是经过高层滤波后的信号接收功率;
优选地,根据同步信号/同步信道ID查表获得发现参考信号的发射功率信息,如图15所示,不同的发现参考信号ID对应不同发射功率等级,例如发现参考信号ID1对应发射功率为21dBm,发现参考信号ID2对应发射功率21dBm,发现参考信号ID3对应发射功率24dBm,发现参考信号ID4对应发射功率27dBm;
优选地,根据同步信号/同步信道ID指示接收广播信号还是接入配置集合,如图15所示,不同同步信号/同步信道ID可以对应不同指示标识位,例如同步信号/同步信道ID2对应指示标识位为1,表示需要终端接收基站1的广播信号/广播信道,执行步骤S603a,例如同步信号/同步信道ID1对应指示标识位为0,表示需要终端去基站2获得接入配置集合,执行步骤S603b;
步骤S603a,基站1发送广播信号/信道,广播信号/广播信道中携带了同步信号/信道的发射功率及开环功率参数;
优选地,广播信号/广播信道与同步信号/同步信道的发送周期/频率一致,即发送一个同步信号/同步信道对应伴随发送一个广播信号/广播信道;
优选地,广播信号/广播信道发送时所占的时域和或频域资源位置与同步信号/同步信道发送时所占的时域和或频域资源位置存在固定的位置关系,例如同步信号/同步信道是在第n个子帧上发送,则广播信号/广播信道是在n+4子帧上进行发送;
步骤S603b,基站2发送接入配置集合,接入配置集合中携带了开环功率参数;
优选地,接入配置集合中包含多套接入配置消息,不同的同步信号/同步信道ID对应不同的接入配置消息;
优选地,基站2为使用new RAT系统的基站;
步骤S604,终端接收并获得同步信号/同步信道的发射功率及开环功控参数,确实上行随机接入信号的发射功率;
步骤S605,终端发送上行随机接入信号。
实施例七:
在本实施例中,提供一种开环功率控制的方法,如图11所示,该流程包括以下步骤:
步骤S701,基站发送同步信号/同步信道和CRS(Cell-specific Reference Signals);
优选地,同步信号/同步信道为窄带信号窄带/信道,只占用部分下行带宽进行发送;
优选地,CRS为宽带信号,离散或者连续的分布在下行全部带宽上进行发送;
步骤S702,终端测量获取CRS的接收功率;
优选地,终端检测同步信号/同步信道用于与基站建立下行同步;
优选地,CRS的接收功率是经过高层滤波后的信号接收功率;
步骤S703,基站发送广播信号/广播信道,广播信号/广播信道中携带了CRS的发射功率及开环功率参数;
优选地,广播信号/广播信道可以伴随同步信号/信道进行发送,即发送周期/频率一致,发送一个同步信号/同步信道就伴随发送一个广播信号/广播信道;
优选地,广播信号/广播信道发送时所占的时域和或频域资源位置固定;
优选地,基站发送广播信号/信道与发射CRS使用相同的波束方向;
步骤S704,终端接收并获得CRS的发射功率及开环功控参数,计算下行路损,确定上行随机接入信号的发射功率;
步骤S705,终端发送上行随机接入信号。
实施例八:
在本实施例中,提供一种开环功率控制的方法,如图12所示,该流程包括以下步骤:
步骤S801,基站1发送新发现参考信号N-DRS和CSI-RS(Channel-state Information Reference Signals);
优选地,基站1为使用new RAT系统的基站;
优选地,新发现参考信号N-DRS为窄带信号/窄带信道,只占用部分下行带宽进行发送;
优选地,CSI-RS为宽带信号,离散的分布在下行全部带宽上进行发送;
步骤S802,终端测量获取CSI-RS的接收功率;
优选地,终端检测新发现参考信号N-DRS用于与基站1建立下行同步;
优选地,CSI-RS的接收功率是经过高层滤波后的信号接收功率;
步骤S803,基站2发送接入配置集合,接入配置集合中携带了CSI-RS的发射功率及开环功率参数;
优选地,接入配置集合中包含多套接入配置消息,不同的新发现参考信号N-DRS ID对应不同的接入配置消息;
优选地,基站2为使用LTE系统的基站;
优选地,接入配置集合中还可以包括使用new RAT系统的可用于终端随机接入的基站的数量信息;
步骤S804,终端接收并获得CSI-RS的发射功率及开环功控参数,计算下行路损,确定上行随机接入信号的发射功率;
优选地,终端可以根据使用new RAT系统的可用于终端随机接入的基站的数量信息进一步控制上行随机接入信号的发射功率,例如,如果该值较大,终端可适当降低功率发送上随机接入信号;
步骤S805,终端发送上行随机接入信号。
实施例九:
在本实施例中,提供一种开环功率控制的方法,如图13所示,该流程包括以下步骤:
步骤S901,基站1发送同步信号/同步信道和CRS;
优选地,基站1为使用new RAT系统的基站;
优选地,同步信号/同步信道为窄带信号/窄带信道,只占用部分下行带宽进行发送;
优选地,CRS为宽带信号,离散或者连续的分布在下行全部带宽上进行发送;
步骤S902,终端测量获取CRS的接收功率,根据同步信号/同步信道指示接收广播信号还是接入配置集合;
优选地,终端检测同步信号/同步信道用于与基站1建立下行同步;
优选地,CRS的接收功率是经过高层滤波后的信号接收功率;
优选地,通过同步信号/同步信道序列中某个bit位指示,例如同步信号/同步信道序列的最后一个bit,如果该bit为1表示需要终端接收基站1的广播信号/广播信道,执行步骤S903a,如果为0表示需要终端去基站2获得接入配置集合,执行步骤S903b;
步骤S903a,基站1发送广播信号/广播信道,广播信号/广播信道中携带了CRS的发射功率及开环功率参数;
优选地,广播信号/广播信道与同步信号/同步信道的发送周期/频率存在倍数关系,发送一个同步信号/同步信道对应发送多个广播信号/广播信道;
优选地,广播信号/广播信道发送时所占的时域和或频域资源位置与同步信号/同步信道发送时所占的时域和或频域资源位置存在固定的位置关系,例如同步信号/同步信道是在第n个子帧上发送,则广播信号/广播信道是在n+3子帧上进行发送;
步骤S903b,基站2发送接入配置集合,接入配置集合中携带了CRS的发射功率及开环功率参数;
优选地,接入配置集合中包含多套接入配置消息,不同的同步信号/同步信道ID对应不同的接入配置消息;
优选地,基站2为使用LTE系统的基站;
步骤S904,终端接收并获得CRS的发射功率及开环功控参数,计算下 行路损,确定上行随机接入信号的发射功率;
步骤S905,终端发送上行随机接入信号。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件(例如处理器)完成,所述程序可以存储于计算机可读存储介质中,如只读存储器、磁盘或光盘等。可选地,上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地,上述实施例中的每个模块/单元可以采用硬件的形式实现,例如通过集成电路来实现其相应功能,也可以采用软件功能模块的形式实现,例如通过处理器执行存储于存储器中的程序/指令来实现其相应功能。本发明不限制于任何特定形式的硬件和软件的结合。”。
虽然本发明所揭露的实施方式如上,但所述的内容仅为便于理解本发明而采用的实施方式,并非用以限定本发明。任何本发明所属领域内的技术人员,在不脱离本发明所揭露的精神和范围的前提下,可以在实施的形式及细节上进行任何的修改与变化,但本发明的专利保护范围,仍须以所附的权利要求书所界定的范围为准。
工业实用性
本发明实施例提出的开环功率控制的方法和装置,涉及无线通信领域,包括:向第二无线节点发送第一信号/信道;指示第二无线节点所述第一信号/信道的发射功率;或者,向第二无线节点发送第一信号/信道和第四信号/信道;指示第二无线节点所述第四信号/信道的发射功率;所述发射功率用于所述第二无线节点计算下行路损和确定上行随机接入信号的发射功率。能够保证在以用户为中心的接入场景下使用合适的发射功率发送上行随机接入请求,从而抵抗路损影响及避免上行用户间干扰。

Claims (48)

  1. 一种开环功率控制的方法,应用于第一无线节点,包括:
    向第二无线节点发送第一信号/第一信道;
    指示第二无线节点所述第一信号/第一信道的发射功率;或者,
    向第二无线节点发送第一信号/第一信道和第四信号/第四信道;
    指示第二无线节点所述第四信号/第四信道的发射功率;
    所述发射功率用于所述第二无线节点计算下行路损和确定上行发射功率。
  2. 如权利要求1所述的方法,其中:指示第二无线节点所述第一信号/第一信道的发射功率包括以下至少之一:
    所述第一信号/第一信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
    所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式;
    所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID存在映射关系。
  3. 如权利要求1所述的方法,其中:指示第二无线节点所述第四信号/第四信道的发射功率包括以下至少之一:
    所述第四信号/信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
    所述第一信号/第一信道指示所述第四信号/第四信道的发射功率的获取方式。
  4. 如权利要求2或3所述的方法,其中,所述第二信号/第二信道或者所述第三信号/第三信道中包括:开环功率控制参数。
  5. 如权利要求2或3所述的方法,其中,所述第二信号/第二信道的发送周期和/或频率与所述第一信号/第一信道的发送周期和/或频率相同,或者,所述第二信号/第二信道的发送周期和/或频率与所述第一信号/第一信道 的发送周期和/或频率存在倍数关系。
  6. 如权利要求2或3所述的方法,其中,发送所述第二信号/第二信道时所占的时域和/或频域资源位置在固定的物理资源上,或者,发送所述第二信号/第二信道时所占的时域和/或频域资源位置与发送所述第一信号/第一信道发送时所占的时域和/或频域资源位置存在对应的位置关系。
  7. 如权利要求2或3所述的方法,其中,所述第三信号/信道中包括一套或者多套接入配置消息,所述接入配置消息中承载了使用所述接入配置消息的所述第一无线节点发送所述第一信号/信道的发射功率或者第四信号/信道的发射功率。
  8. 如权利要求2或3所述的方法,其中,所述第三信号与所述第一信号/第一信道由不同的第一无线节点发送。
  9. 如权利要求8所述的方法,其中,所述不同的所述第一无线节点为:不同系统下的所述第一无线节点;
    所述不同系统为全球移动通信系统GSM、长期演进LTE、通用移动通信系统UMTS、新无线接入类型New RAT中的一种。
  10. 如权利要求2所述的方法,其中,所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式包括:
    由所述第一信号/第一信道指示所述第一无线节点发送所述第一信号/第一信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
  11. 如权利要求3所述的方法,其中,所述第一信号/信道指示所述第四信号/第四信道的发射功率的获取方式包括:
    由所述第一信号/第一信道指示所述第一无线节点发送所述第四信号/第四信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
  12. 如权利要求1所述的方法,其中:
    所述第一信号/第一信道用于同步和/或小区发现,且占用部分下行带宽发送;
    所述第四信号/第四信道离散或者连续的在下行全部带宽上发送。
  13. 如权利要求4所述的方法,其中:所述开环功率控制参数包括以下至少之一:最大发射功率信息、目标接收功率信息、不同前导序列类型功率需求的偏差信息、接入次数信息、功率递增的步长信息、补偿调整量信息。
  14. 如权利要求13所述的方法,其中:所述补偿调整量信息用于对路损进行补偿,或者,用于对上行发射功率进行补偿。
  15. 如权利要求3所述的方法,其中:发送所述第四信号/第四信道使用的波束方向与发送所述第二信号/第二信道使用的波束方向相同。
  16. 如权利要求2或3所述的方法,其中:所述第二信号/第二信道或者所述第三信号/第三信道还包括:接入补偿调整量信息和/或所述第一无线节点数量信息。
  17. 一种开环功率控制的方法,应用于第二无线节点,包括:
    接收第一无线节点发送的第一信号/第一信道并测量获得所述第一信号/第一信道的接收功率;
    获得所述第一信号/第一信道的发射功率和/或开环功率控制参数;或者,
    接收第一无线节点发送的第四信号/第四信道并测量获得所述第四信号/第四信道的接收功率;
    获得所述第四信号/第四信道的发射功率和/或开环功率控制参数;
    计算下行路损和确定上行发射功率。
  18. 如权利要求17所述的方法,其中:接收所述第一无线节点发送的所述第一信号/第一信道或者所述第四信号/第四信道的发射功率和/或开环功率控制参数包括:
    在第二信号/第二信道或者第三信号/第三信道中获取所述第一无线节点发送的所述第一信号/第一信道或者所述第四信号/第四信道的发射功率,或者,根据所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID的映射关系获取所述第一无线节点发送的所述第一信号/第一信道的发射功率;和/或,
    在第二信号/第二信道或者第三信号/第三信道中获取开环功率控制参数。
  19. 如权利要求18所述的方法,其中:所述第二信号/第二信道的接收周期和/或频率与所述第一信号/第一信道的接收周期和/或频率相同,或者,所述第二信号/第二信道的接收周期和/或频率与所述第一信号/第一信道的接收周期和/或频率存在倍数关系。
  20. 如权利要求18所述的方法,其中:接收所述第二信号/第二信道时所占的时域和/或频域资源位置在固定的物理资源上,或者,接收所述第二信号/第二信道时所占的时域和/或频域资源位置与接收所述第一信号/第一信道发送时所占的时域和/或频域资源位置存在对应的位置关系。
  21. 如权利要求18所述的方法,其中:所述开环功率控制参数包括以下至少之一:最大发射功率信息、目标接收功率信息、不同前导序列类型功率需求的偏差信息、接入次数信息、功率递增的步长信息、补偿调整量信息。
  22. 如权利要求21所述的方法,其中:所述补偿调整量信息用于对路损进行补偿,或者,用于对上行发射功率进行补偿。
  23. 如权利要求17所述的方法,其中:所述计算下行路损包括:
    根据所述第一信号/第一信道或者所述第四信号/第四信道的接收功率与所述第一信号/第一信道或者所述第四信号/第四信道的发射功率和/或开环功率控制参数计算下行路损。
  24. 如权利要求23所述的方法,其中:按照如下公式计算所述下行路损PL:
    PL=P1Tx-P1RX或者,PL=P2Tx-P2RX
    或者,PL=P1Tx-P1RX+Δβ或者,PL=P2Tx-P2RX+Δβ
    其中,PL表示路径损耗,P1Tx表示所述第二无线节点接收所述第一无线节点发送所述第一信号/信道使用的发射功率;P1RX表示所述第二无线节点测量获得所述第一信号/PL信道的接收功率;P2Tx表示所述第二无线节点接收所述第一无线节点发送所述第四信号/第四信道使用的发射功率;P2RX表 示所述第二无线节点测量获得所述第四信号/第四信道的接收功率;Δβ表示补偿调整量。
  25. 如权利要求17所述的方法,其中:所述上行发射功率包括上行随机接入信号的发射功率;
    确定所述上行随机接入信号的发射功率包括:根据下行路损和/或开环功率控制参数计算确定上行随机接入信号的发射功率。
  26. 如权利要求25所述的方法,其中:按照如下公式计算所述上行随机接入信号的发射功率PRACH
    PRACH=min(Pmax,P0+PL)
    或者,PRACH=min(Pmax,P0+PL+Δβ)
    其中,Pmax表示所述第二无线节点的最大发射功率,P0表示目标接收功率,Δβ表示补偿调整量,PL表示路径损耗;PRACH表示上行随机接入信号的发射功率。
  27. 如权利要求17所述的方法,其中:获得所述第一信号/第一信道的接收功率包括:
    对测量获得所述第一信号/第一信道的接收功率进行高层滤波;
    获得滤波后的接收功率。
  28. 根据权利要求17所述的方法,其中:获得所述第一信号/第一信道的发射功率还包括:接收所述第一无线节点发送的接入补偿调整量信息;所述接入补偿调整量信息用于所述第二无线节点选择所述第一无线节点。
  29. 根据权利要求28所述的方法,其中:所述第二无线节点选择所述第一无线节点包括:
    所述第二无线节点基于所述第一无线节点的接收功率和接入补偿调整量信息估计宽带信号接收功率,选择所述第一无线节点。
  30. 根据权利要求17所述的方法,其中:计算下行路损和确定上行随机接入信号的发射功率之前还包括:
    接收所述第一无线节点发送的所述第一无线节点的数量信息;
    参考数量信息确定上行随机接入信号的发射功率。
  31. 一种开环功率控制的装置,设置于第一无线节点,包括:
    第一发送模块,设置为向第二无线节点发送第一信号/第一信道;
    第一指示模块,设置为指示第二无线节点所述第一信号/第一信道的发射功率;或者,
    第二发送模块,设置为向第二无线节点发送第一信号/第一信道和第四信号/第四信道;
    第二指示模块,设置为指示第二无线节点所述第四信号/第四信道的发射功率;
    所述发射功率用于所述第二无线节点计算下行路损和确定上行发射功率。
  32. 如权利要求31所述的装置,其中:所述第一指示模块指示第二无线节点所述第一信号/第一信道的发射功率包括以下至少之一:
    所述第一信号/第一信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
    所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式;
    所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID存在映射关系。
  33. 如权利要求31所述的装置,其中:所述第二指示模块指示第二无线节点所述第四信号/第四信道的发射功率包括以下至少之一:
    所述第四信号/第四信道的发射功率承载在第二信号/第二信道或者第三信号/第三信道中发送至所述第二无线节点;
    所述第一信号/第一信道指示所述第四信号/第四信道的发射功率的获取方式。
  34. 如权利要求32所述的装置,其中,所述第一指示模块的所述第一信号/第一信道指示所述第一信号/第一信道的发射功率的获取方式包括:
    由所述第一信号第一/信道指示所述第一无线节点发送所述第一信号/第一信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
  35. 如权利要求33所述的装置,其中,所述第二指示模块的所述第一信号/第一信道指示所述第四信号/第四信道的发射功率的获取方式包括:
    由所述第一信号/第一信道指示所述第一无线节点发送所述第四信号/第四信道时使用的发射功率承载在所述第二信号/第二信道中或者承载在所述第三信号/第三信道中。
  36. 如权利要求31所述的装置,其中:
    所述第一发送模块,还设置为所述第一信号/第一信道用于同步和或小区发现占用部分下行带宽发送;
    所述第二发送模块,还设置为所述第四信号/第四信道离散或者连续的在下行全部带宽上发送。
  37. 如权利要求33所述的装置,其其中:所述第二发送模块发送所述第四信号/第四信道使用的波束方向与发送所述第二信号/第二信道使用的波束方向相同。
  38. 一种开环功率控制的装置,设置于第二无线节点,包括:
    第一接收模块,设置为接收第一无线节点发送的第一信号/第一信道并测量获得所述第一信号/第一信道的接收功率;
    第一功率模块,设置为获得所述第一信号/第一信道的发射功率和/或开环功率控制参数;或者,
    第二接收模块,设置为接收第一无线节点发送的第四信号/第四信道并测量获得所述第四信号/第四信道的接收功率;
    第二功率模块,设置为获得所述第四信号/第四信道的发射功率和/或开环功率控制参数;
    计算模块,设置为计算下行路损和确定上行发射功率。
  39. 如权利要求38所述的装置,其中:所述第一功率模块获得所述第 一信号/第一信道或所述第二功率模块获得所述第四信号/第四信道的发射功率和/或开环功率控制参数包括:
    在第二信号/第二信道或者第三信号/第三信道中获取所述第一无线节点发送的所述第一信号/第一信道或者所述第四信号/第四信道的发射功率,或者,根据所述第一信号/第一信道的发射功率与所述第一信号/第一信道的标识ID的映射关系获取所述第一无线节点发送的所述第一信号/第一信道的发射功率;和/或,
    在第二信号/第二信道或者第三信号/第三信道中获取开环功率控制参数。
  40. 如权利要求38所述的装置,其中:所述计算模块计算下行路损包括:
    根据所述第一信号/第一信道或者所述第四信号/第四信道的接收功率与所述第一信号/第一信道或者所述第四信号/第四信道的发射功率和/或开环功率控制参数计算下行路损。
  41. 如权利要求40所述的装置,其中:所述计算模块按照如下公式计算所述下行路损PL:
    PL=P1Tx-P1RX或者,PL=P2Tx-P2RX
    或者,PL=P1Tx-P1RX+Δβ或者,PL=P2Tx-P2RX+Δβ
    其中,PL表示路径损耗,P1Tx表示所述第二无线节点接收所述第一无线节点发送所述第一信号/信道使用的发射功率;P1RX表示所述第二无线节点测量获得所述第一信号/信道的接收功率;P2Tx表示所述第二无线节点接收所述第一无线节点发送所述第四信号/第四信道使用的发射功率;P2RX表示所述第二无线节点测量获得所述第四信号/第四信道的接收功率;Δβ表示补偿调整量。
  42. 如权利要求38所述的装置,其中:所述上行发射功率包括上行随机接入信号的发射功率;
    所述计算模块确定发射功率包括:根据下行路损和/或开环功率控制参数计算确定上行随机接入信号的发射功率。
  43. 如权利要求42所述的装置,其中:所述计算模块按照如下公式计算所述上行随机接入信号的发射功率PRACH
    PRACH=min(Pmax,P0+PL)
    或者,PRACH=min(Pmax,P0+PL+Δβ)
    其中,Pmax表示所述第二无线节点的最大发射功率,P0表示目标接收功率,Δβ表示补偿调整量,PL表示路径损耗;PRACH表示上行随机接入信号的发射功率。
  44. 如权利要求38所述的装置,其中:所述第一功率模块获得所述第一信号/第一信道的接收功率包括:
    对测量获得所述第一信号/第一信道的接收功率进行高层滤波;
    获得滤波后的接收功率。
  45. 根据权利要求38所述的装置,其中:所述第一功率模块获得所述第一信号/第一信道的发射功率还包括:接收所述第一无线节点发送的接入补偿调整量信息;所述接入补偿调整量信息用于所述第二无线节点选择所述第一无线节点。
  46. 根据权利要求45所述的装置,其中:所述第一功率模块的所述第二无线节点选择所述第一无线节点包括:
    所述第二无线节点基于所述第一无线节点的接收功率和接入补偿调整量信息估计宽带信号接收功率,选择所述第一无线节点。
  47. 根据权利要求38所述的装置,其中:还包括:
    第三接收模块,设置为接收所述第一无线节点发送的所述第一无线节点的数量信息;
    确定模块,设置为参考数量信息确定上行随机接入信号的发射功率。
  48. 一种计算机可读存储介质,存储有计算机可执行指令,所述计算机可执行指令用于执行权利要求1~权利要求16、和/或权利要求17~权利要求30任一项所述的开环功率控制的方法。
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