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WO2019205046A1 - Procédé de réglage de puissance et dispositif associé - Google Patents

Procédé de réglage de puissance et dispositif associé Download PDF

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Publication number
WO2019205046A1
WO2019205046A1 PCT/CN2018/084575 CN2018084575W WO2019205046A1 WO 2019205046 A1 WO2019205046 A1 WO 2019205046A1 CN 2018084575 W CN2018084575 W CN 2018084575W WO 2019205046 A1 WO2019205046 A1 WO 2019205046A1
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WIPO (PCT)
Prior art keywords
terminal device
coverage level
determining
network
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/084575
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English (en)
Chinese (zh)
Inventor
何朗
陈冬明
曾龙基
宁磊
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2018/084575 priority Critical patent/WO2019205046A1/fr
Priority to CN201880092564.9A priority patent/CN111989955B/zh
Publication of WO2019205046A1 publication Critical patent/WO2019205046A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a power adjustment method and related equipment.
  • the signal transmission power of one user not only affects the strength of message transmission, but also may interfere with other users and affect the communication quality of other users. Therefore, in mobile communication, The power control technology is very important.
  • the 3rd Generation Partnership Project (3GPP) R13 protocol stipulates that the terminal equipment can adjust the physical random access channel (PRACH) transmission power according to the access coverage level and the number of access attempts.
  • Physical Uplink Shared Channel (PUSCH) transmit power.
  • Different access coverage levels may be used to combat different degrees of channel attenuation, and the corresponding number of PUSCH repetitions may be selected between the network device and the terminal device according to the access coverage level.
  • PRACH physical random access channel
  • PUSCH Physical Uplink Shared Channel
  • FIG. 1 is a schematic diagram of a random access process of a terminal device.
  • the terminal device first initiates a random access request to the network device at the current access coverage level.
  • the terminal device determines whether the response information of the network device is received. If the response information from the network device is not received within a certain period of time, it is determined in 103 whether the current access attempt times reach the current access coverage. The maximum number of access attempts for the level. If the maximum number of access attempts corresponding to the current access coverage level is not reached, step 101 may be performed again, and the random access request is initiated by the current PUSCH repetition number on the current access coverage level; if the current access coverage level is reached.
  • step 104 it may be determined in 104 whether the current access coverage level is a preset maximum access coverage level. If the terminal device determines that the current access coverage level is not the preset maximum access coverage level, step 105 may be performed to upgrade an access coverage level based on the current access coverage level, so as to upgrade the access coverage level again. Step 101 is performed; if the maximum number of access attempts of the preset maximum access coverage level is reached, and the response of the network device is not received, the random access fails.
  • the protocol stipulates that when the access coverage level of the terminal device is greater than 0, the terminal device uses the maximum PRACH transmission power and does not perform power adjustment; when the PUSCH repetition number is greater than or equal to 2, the terminal device uses the maximum PUSCH transmission power. . Then, if there are too many terminal devices in the current network access, the insufficient channel resources in the network will easily lead to the increase of the access coverage level of the terminal equipment and the increase of the number of PUSCH repetitions.
  • the terminal equipment needs to adopt the maximum PRACH transmission power and the maximum PUSCH.
  • the transmit power sends a signal, which in turn causes interference to other users to increase, and the power consumption of the terminal device increases accordingly.
  • the technical problem to be solved by the present application is how to avoid interference to other users to a certain extent and reduce the power consumption of the terminal device.
  • the present application provides a power adjustment method, which is applicable to a terminal device.
  • the method may include: determining whether a current network where the terminal device is located is in a congested state, and measuring the terminal device when the current network is in a congested state.
  • the current reference signal receiving power (RSRP) determines the PRACH transmission power and the PUSCH transmission power according to the RSRP measured by the terminal device.
  • the terminal device may If the current network is in a congested state, the PRACH transmit power and the PUSCH transmit power are adjusted according to the actual measured RSRP value, instead of directly using the maximum transmit power, which reduces the terminal device to use the maximum transmit power to some extent.
  • the opportunity of the signal also reduces the interference to other users and reduces the power consumption of the terminal device itself.
  • the terminal device determines the PRACH transmission power according to the measured RSRP, or determines the current access coverage level according to the RSRP measured by the terminal device, and then determines according to the current access coverage level and the RSRP.
  • PRACH transmit power As a feasible implementation manner, the terminal device determines the PRACH transmission power according to the measured RSRP, or determines the current access coverage level according to the RSRP measured by the terminal device, and then determines according to the current access coverage level and the RSRP. PRACH transmit power.
  • the access coverage level determined by the terminal device by using the RSRP is independent of the number of access attempts, and does not rise as the number of access attempts increases, thereby improving access coverage.
  • the stability of the level, at the same time, the access coverage level does not rise can also reduce the opportunity for the terminal device to transmit signals with the maximum transmit power.
  • the terminal device determines the current access coverage level according to the reference signal received power measured by the terminal device, where: the reference signal received power measured by the terminal device is less than the first preset power threshold. Determining the current access coverage level as the first coverage level; determining the current access coverage when the reference signal received power measured by the terminal device is greater than or equal to the first preset power threshold and less than the second preset power threshold. The level is the second coverage level. When the reference signal received by the terminal device is greater than or equal to the second preset power threshold, the current access coverage level is determined to be the third coverage level. The first coverage level is smaller than the second coverage level, and the second coverage level is smaller than the third coverage level.
  • the terminal device uses the preset two reference signal to receive the power threshold, and divides the access coverage level into three coverage levels, and the terminal device receives and receives the power according to the reference signal.
  • the corresponding relationship of the coverage levels can accurately determine the current access level of the terminal device, and improve the efficiency of the terminal device to determine the current access level.
  • the terminal device determines the PRACH transmit power according to the current access coverage level and the reference signal received power measured by the terminal device, where the current access coverage level is the first coverage level or the second When the level is covered, the PRACH transmission power is determined according to the reference signal received power measured by the terminal device.
  • the PRACH transmit power determined by the reference signal received by the terminal device may be less than or equal to the maximum PRACH transmit power, and may be represented if the current access coverage level of the terminal device is the first coverage level or the second coverage level.
  • the signal coverage capability of the terminal device is strong. Even if the PRACH transmission power is smaller than the maximum PRACH transmission power, the coverage of the signal can be ensured, and the power consumption overhead of the terminal device can also be reduced.
  • the terminal device may determine that the PRACH transmission power is the preset maximum PRACH transmission power.
  • the terminal device may adopt the preset The maximum PRACH transmit power is transmitted to ensure efficient transmission of the signal.
  • the network device may determine the number of PUSCH repetitions by detecting the intensity value of the PRACH channel.
  • the terminal device may receive the number of repetitions of the PUSCH that is sent by the network device, and determine the PUSCH transmit power according to the reference signal received power measured by the terminal device, which may be: according to the number of repetitions of the PUSCH and the reference signal received by the terminal device.
  • the PUSCH transmit power is determined.
  • the number of repetitions of the PUSCH is determined according to the strength value of the PRACH channel, and is independent of the access coverage level. Therefore, by implementing the above feasible implementation manner, when the network is in a congested state, the number of repetitions of the PUSCH does not follow the access.
  • the rise of the coverage level changes to a certain extent, reducing the opportunity for the terminal device to transmit signals with the maximum transmit power, and also reduces the interference to other users, thereby reducing the power consumption overhead of the terminal device itself.
  • the terminal device determines that the current network is in a congested state, and includes: receiving a congestion indication parameter sent by the network device; determining, according to the congestion indication parameter sent by the network device, whether the current network is in a congested state.
  • the network device can communicate with each terminal in the cell, and can better determine the current network congestion. Therefore, by implementing the foregoing feasible implementation manner, the terminal device determines whether the current network is in the current network through the congestion indication parameter sent by the network device. Congestion status can improve the accuracy of judging network status.
  • the congestion indication parameter may include a backoff index in the random access response, where the backoff index is used to indicate a waiting time for the terminal device to perform random access. Determining whether the current network is in a congested state according to the congestion indication parameter sent by the network device, if the backoff index in the random access response sent by the network device is not zero, determining that the current network state is in a congested state If the backoff index in the random access response delivered by the network device is zero, it is determined that the current network state is not in a congested state.
  • the congestion indication parameter includes an access prohibition function parameter in the system message, and determining, according to the congestion indication parameter of the network device, that the current network is in a congestion state, including: if the system message is accessed. If the function parameter is disabled, the current network is in a congested state.
  • the terminal device may determine the current number of access attempts and the current access coverage level.
  • a terminal device which has the function of implementing the behavior of the terminal device in the above-mentioned first aspect or the possible implementation manner of the first aspect.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • This module can be software and/or hardware.
  • a terminal device comprising: a memory for storing one or more programs; and a processor for calling a program stored in the memory to implement the method design of the first aspect above
  • a processor for calling a program stored in the memory to implement the method design of the first aspect above
  • a communication device comprising a processing element and a storage element, wherein the storage element is for storing a program, and when the program is called by the processing element, implementing the first aspect as described above
  • the solution in the method design, the implementation manner and the beneficial effects of the terminal device for solving the problem can be referred to the implementation manners and the beneficial effects of the first aspect and the possible methods of the first aspect, and the repeated description is not repeated.
  • a computer readable storage medium storing a computer program, the computer program comprising program instructions, the program instructions, when executed by a processor, causing the processor to perform the above.
  • FIG. 1 is a schematic flowchart of a random access process of a terminal device according to an embodiment of the present application
  • FIG. 2 is a system architecture diagram for power adjustment provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of an uplink channel mapping provided by the present application.
  • FIG. 4 is a schematic diagram of a scenario of a radio interface protocol layer provided by the present application.
  • FIG. 5 is a schematic flow chart of a power adjustment method provided by the present application.
  • FIG. 6 is a schematic flow chart of another power adjustment method provided by the present application.
  • FIG. 7 is a schematic flow chart of still another power adjustment method provided by the present application.
  • FIG. 8 is a schematic structural diagram of a power adjustment provided by the present application.
  • FIG. 9 is a schematic structural diagram of a terminal device provided by the present application.
  • FIG. 10 is a schematic structural diagram of a network device provided by the present application.
  • FIG. 2 is a system architecture diagram for power adjustment provided by an embodiment of the present application.
  • the system may be not limited to a 3G mobile communication system, a Long Term Evolution (LTE) mobile communication system, a future evolution of the 5th Generation (5G) system, a new air interface (NR) system, a honeycomb The Cellular Interner of Things (CIOT) system, and the subsequent evolution system, etc., wherein the CIOT system includes but is not limited to the Narrowband Internet of Things (NB-IoT) and the Machine Type Communication (MTC) system.
  • the system can include: one or more terminal devices 201, and network devices 202. among them:
  • the terminal device 201 can be a terminal residing in the cell 203. In one embodiment, the terminal devices 201 can be distributed throughout the system. In some embodiments of the present application, the terminal device 201 may be, for example, a mobile device, a mobile station, a mobile unit, an M2M terminal, a wireless unit, a remote unit, a user agent, a mobile client, a cellular Internet of Things (Ceoular Internet of Things, CIoT) terminals.
  • CIoT cellular Internet of Things
  • terminal device 201 can be used to communicate with network device 202 over wireless interface 204.
  • the network device 202 can be a base station, which can be used for communication with one or more terminal devices, and can also be used for communication with one or more base stations having partial terminal functions (such as a macro base station and a micro base station, such as access). Point, communication between).
  • the base station may be a Base Transceiver Station (BTS) in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, or may be an evolved base station in an LTE system (Evolutional Node B). , eNodeB), and base stations in 5G systems, new air interface (NR) systems.
  • BTS Base Transceiver Station
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • LTE Long Term Evolutional Node B
  • eNodeB evolved base station in 5G systems, new air interface (NR) systems.
  • the base station may also be an Access Point (AP), a Transmission Point (TRP), a Central Unit (CU), or other network entity, and may include some of the functions of
  • network device 202 can be used to communicate with terminal 203 over wireless interface 204 under the control of a network device controller (not shown).
  • the network device controller may be part of the core network or may be integrated into the network device 201.
  • FIG. 3 shows an upstream channel map corresponding to the wireless interface 204 of FIG. 2 (ie, the wireless interface between the terminal device 202 and the network device 201).
  • FIG. 4 shows a radio interface protocol layer, and the interface between the radio interface protocol layers can be expressed as a channel, and specifically includes: a logical channel, a transport channel, and a physical channel. among them:
  • Logical channel The logical channel describes the type of information, that is, what information is transmitted.
  • the interface between the Media Access Control (MAC) layer and the Radio Link Control (RLC) layer is a logical channel.
  • the MAC layer provides services to the RLC layer through logical channels.
  • logical channels are divided into two categories: logical control channels and logical traffic channels.
  • the uplink logical control channel is used for transmitting control plane information, and may include: a CCCH (Common Control Channel) and a DCCH (Dedicated Control Channel).
  • the uplink logical service channel is used to transmit user plane information, and may include: DTCH (Dedicated Traffic Channel) and the like.
  • Transport channel The transport channel describes the way information is transmitted, that is, how information is transmitted.
  • the interface between the Physical Layer (PHY) and the Medium Access Control (MAC) layer is a transport channel.
  • the PHY layer provides services to the MAC layer through the transport channel.
  • the transport channel can typically be classified according to the manner in which the signal is transmitted over the radio interface, such as channel coding strategy, modulation method, and antenna mapping.
  • the uplink transport channel may include: an UL-SCH (Uplink Shared Channel) and a RACH (Random Access Channel).
  • UL-SCH Uplink Shared Channel
  • RACH Random Access Channel
  • the physical channel corresponds to a set of Resource Elements (REs) that carry high-level information.
  • the basic entities that make up the physical channel are Resource Factor (RE) and Resource Block (RB).
  • the uplink physical channel may include a PUSCH (Physical Uplink Shared Channel) and a PRACH (Physical Random Access Channel).
  • PUSCH Physical Uplink Shared Channel
  • PRACH Physical Random Access Channel
  • the PRACH channel is an access channel that the terminal device 201 initially initiates a random access request. After receiving the response information of the network device 202, the terminal device 201 sends an RRC request connection message (RRC Connection) on the PUSCH channel according to the information indicated by the network device 202. Request) message.
  • RRC Connection RRC request connection message
  • the PUSCH channel can be used by multiple users in a time-sharing manner, or the channel has a short duration.
  • the uplink power control of the terminal device 201 may include two parts: power control of the PUSCH and power control of the PRACH.
  • the power control of the PRACH and the power control of the PUSCH are aimed at ensuring that the terminal device transmits the random access signal with less power as much as possible, thereby reducing interference to other users and making the terminal device power-saving. , reduce power consumption.
  • FIG. 2 is only for better explaining the technical solution of the present application, and does not constitute a limitation of the present application.
  • Those skilled in the art may know that with the evolution of the network architecture and the emergence of new business scenarios, The technical solutions provided by the present application are equally applicable to similar technical problems.
  • the main inventive principle of the present application may include: the terminal device and the network device need to establish a communication link by performing a random access procedure, where the random access procedure may refer to sending a random access signal (random access request) from the terminal device to
  • the process of establishing a basic signaling connection with a network device is usually the last step in establishing a connection between the terminal device and the network device.
  • the R13 protocol stipulates that when the terminal device performs the random access procedure, if the access coverage level of the terminal device is greater than 0, the terminal device uses the maximum PRACH transmit power and does not perform power adjustment; when the PUSCH repetition number is greater than or equal to 2, The terminal device uses the maximum PUSCH transmit power fixedly.
  • the terminal equipment needs to adopt the maximum PRACH transmission power and the maximum PUSCH.
  • the transmit power sends a signal, which in turn causes interference to other users to increase, and the power consumption of the terminal device increases accordingly.
  • the terminal device may first determine whether the current network is in a congested state, and if in a congested state, calculate the PRACH transmit power and the PUSCH transmit power by using the actually measured Reference Signal Receiving Power (RSRP).
  • RSRP Reference Signal Receiving Power
  • the RSRP actually measured by the terminal device can be used not only to indicate the signal coverage strength of the network device and the terminal device, but also to measure the path loss condition, so that the terminal device can select the transmission power according to the actual coverage, and the selected transmission power can be less than or Equal to the maximum transmit power, which reduces the chance of transmitting signals by using the maximum PRACH transmit power and the maximum PUSCH transmit power due to congestion, and also saves air interface resources and reduces interference to other devices.
  • the power control of the PRACH transmit power is taken as an example. If the terminal device determines that the network is in a congested state, it may indicate that the current terminal device has a high probability of random access failure, and the terminal device has a high number of access attempts. When the terminal device reaches a certain number of times, the terminal device is likely to adopt a preset The maximum PRACH transmit power and the maximum PUSCH transmit power transmit signal. At this time, the terminal device measures the RSRP value when the network is in a congested state. If the measured RSRP value is less than the preset threshold value RSRP1, the terminal device sets the access coverage level of the network device to 0, and then calculates according to the RSRP.
  • RSRP preset threshold value
  • the downlink path loss value (the difference between the CRS signal power sent by the network device and the CRS signal power received by the terminal device), and the PRACH transmit power can be calculated according to the downlink path loss value, and the calculated PRACH transmit power is less than or equal to Maximum PRACH transmit power.
  • the RSRP value may be related to the signal coverage strength.
  • the relative positions of the terminal device and the network device are unchanged, and the RSRP value is It can be unchanged. The access coverage level will not increase, and the PRACH transmit power will not increase.
  • the power control of the PUSCH transmit power of the terminal device can also reduce the chance of transmitting signals by using the maximum PUSCH transmit power due to congestion, save air interface resources, and reduce interference to other devices, and details are not described herein.
  • the terminal device involved in the present application may be a near-end terminal device, where the near-point terminal device refers to: a terminal device whose distance value from the network device is less than or equal to a preset distance threshold, where the preset distance threshold may be According to the agreement, it can also be specified by the network device and/or the terminal device.
  • the network device can determine whether to send the congestion indication parameter to the corresponding terminal device by the near-end terminal device identification.
  • FIG. 5 is a flow chart showing the implementation of the power adjustment method provided by the present application on the network device side and the terminal device side.
  • FIG. 6 and FIG. 7 show a specific implementation process of the power adjustment method provided by the present application on the terminal device side.
  • the power adjustment method provided by the present application may include:
  • the network device performs identification of the near-end terminal device and determines the near-point terminal device.
  • the network device may perform PRACH signal strength detection and distinguish the near-far terminal device according to the detected PRACH strength value. For example, if the PRACH signal strength value of the terminal device is greater than the first preset strength threshold, it may be determined that the terminal device is a near-point terminal device; if the PRACH signal strength value of the terminal device is greater than a second preset intensity threshold and less than or equal to The first preset strength threshold may determine that the terminal device is a medium-to-nearpoint terminal device; if the PRACH signal strength value of the terminal device is less than or equal to the second preset parameter threshold, determining that the terminal device is a far-end terminal device.
  • the network device may acquire a channel quality parameter (CQI) of the terminal device, and determine a location relationship between the terminal device and the network device according to the CQI. If the CQI of the terminal device is greater than the first preset parameter threshold, it may be determined that the distance between the terminal device and the network device is less than a first preset distance threshold, that is, the terminal device is a near-point terminal device.
  • CQI channel quality parameter
  • the distance between the terminal device and the network device is greater than or equal to the first preset.
  • the distance threshold is less than or equal to the second preset distance threshold, that is, the terminal device is a medium-to-nearpoint terminal device; if the channel quality parameter of the terminal device is less than or equal to the second preset parameter threshold, determining the terminal device.
  • the distance value between the network device and the network device is greater than or equal to the second preset distance threshold, that is, the terminal device is a remote terminal device.
  • the network device may also determine the near-point terminal device according to the positioning. For example, the network device may measure the uplink pilot signals of the respective terminal devices to obtain a Time of Arrival (TOA) or a Time Difference of Arrival (TDOA) of the uplink pilot signals of different terminal devices, according to the measurement. As a result, the location of each terminal device is calculated according to the location coordinates of the network device itself, thereby estimating the distance between each terminal device and the network device, and determining that the terminal device whose distance value is smaller than the first preset distance threshold is a near-point terminal. device.
  • TOA Time of Arrival
  • TDOA Time Difference of Arrival
  • the network device may determine that the terminal device with the distance between the network device is greater than or equal to the first preset distance threshold, and is less than or equal to the second preset distance threshold, and is a medium-to-nearpoint terminal device;
  • the terminal device whose distance value between the devices is greater than or equal to the second preset distance threshold is a remote terminal device.
  • the manner in which the network device recognizes the near-point terminal device may be other methods, including but not limited to the LTE protocol, the 5G protocol, and the like, and the embodiment of the present invention does not impose any limitation.
  • the network device sends a congestion indication parameter to the determined near-point terminal device.
  • the terminal device determines whether the current network is in a congested state.
  • the terminal device may determine whether the current network is in a congested state according to the congestion indication parameter delivered by the network device.
  • the terminal device determines whether the current network is in a congested state according to the congestion indication parameter sent by the network device.
  • the congestion indication parameter may be a backoff index in a random access response (RAR), and the backoff index may be used to indicate a waiting time for the terminal device to perform random access, that is, , the length of time to wait for the random access signal to be sent. If the backoff index of the random access response sent by the network device is 0, it may indicate that the terminal device may send a random access signal without waiting in line, that is, the current network is not in a congested state; if the network device delivers a random connection If the back-off index of the incoming response is not 0, it may indicate that the terminal device needs to wait in line to send a random access signal, that is, the current network is in a congested state.
  • RAR random access response
  • the congestion indication parameter may also be an Access Barring (AB) function parameter in the system message, and the access barring function parameter may be used to indicate whether the network device allows the terminal device to perform random access.
  • AB Access Barring
  • the congestion indication parameter may also be a parameter directly used in the system message to indicate whether the network is congested. For example, if the network is in a congested state, the network device can put the congestion indication parameter in the system message into the startup state; if the network is not in the congestion state, the network device can put the congestion indication parameter in the system message into the inactive state.
  • the terminal device measures the RSRP of the terminal device.
  • the signal power of the received cell reference signal (Cell-specific reference signal) (CRS) may be measured, and the received signal is received.
  • the power of the CRS signal is RSRP, which can be defined as the average of the linear power at the resource location carrying the CRS signal within the measurement bandwidth.
  • the RSRP value can be used for wireless signal strength, that is, the actual coverage of the downlink signal. In some feasible implementation manners, the closer the location of the terminal device to the network device is, the larger the RSRP value is. When the terminal device is located farther from the network device, the RSRP value is smaller.
  • the manner of measuring the RSRP in the present application includes, but is not limited to, the manner of measuring the RSRP involved in the LTE system, the CIOT system, and the 5G system, and is not limited herein.
  • the network device can calculate the PRACH transmit power and the PUSCH transmit power through RSRP.
  • the network device may determine a current access coverage level by using RSRP, and determine a PRACH transmission power according to the current access coverage level.
  • the terminal device may further receive the number of repetitions of the PUSCH sent by the network device, where the number of repetitions of the PUSCH is determined by the network device according to the strength value of the PRACH channel, and the terminal device may determine the PUSCH transmission by using the number of repetitions of the PUSCH and the RSRP. power.
  • the terminal device determines a sum of PUSCH transmit power and PRACH transmit power, and may transmit a random access signal at a determined power.
  • the random access signal may include a random access preamble
  • the terminal device may select the random access preamble, or may also specify a random access preamble by the network device, and the embodiment of the present invention does not do any limit.
  • the network device sends a congestion indication parameter according to the current network condition, and the terminal device determines, according to the congestion indication parameter, whether the current network is in a congested state, and if yes, selects a PRACH transmission power according to the actually measured RSRP.
  • the PUSCH transmit power avoids the problem that the number of access attempts of the terminal device reaches a certain level, and the coverage level and the number of repetitions are increased, thereby using the maximum PRACH transmit power and the maximum PUSCH transmit power to transmit signals, which reduces the use of the terminal device to a certain extent.
  • the opportunity for power to transmit signals reduces interference to other terminal devices and also saves power consumption of the terminal devices themselves.
  • FIG. 6 is a schematic flowchart of the power adjustment method provided by the present application on the terminal device side. Specifically, FIG. 6 shows an implementation manner of determining, by the terminal device, the PUSCH transmit power and the PRACH transmit power according to the RSRP, which may include:
  • the terminal device determines a current access coverage level according to the RSRP measured by the terminal device.
  • the access coverage level may be a differentiated identifier for different coverage areas of the cell, and different access coverage levels may be used to combat different degrees of channel attenuation, and the network device and the terminal device may be covered according to access.
  • the level is selected to correspond to the number of PUSCH repetitions and to configure different PRACH channel resources.
  • the determining, by the terminal device, the current access coverage level according to the RSRP measured by the terminal device may include: when the reference signal received by the terminal device is less than the first preset power threshold, determining the current connection The coverage level is the first coverage level; when the reference signal received by the terminal device is greater than or equal to the first preset power threshold and less than the second preset power threshold, determining that the current access coverage level is the second coverage a level: when the reference signal received by the terminal device is greater than or equal to a second preset power threshold, determining that the current access coverage level is a third coverage level; wherein the first coverage level is less than the second coverage level The second coverage level is less than the third coverage level.
  • the terminal device may preset two RSRP thresholds: RSRP1 (ie, a first preset power threshold) and RSRP2 (ie, a second preset power threshold).
  • RSRP1 ie, a first preset power threshold
  • RSRP2 ie, a second preset power threshold
  • the UE selects the coverage level 0 (ie, the first coverage level)
  • the UE selects the coverage level 1 (ie, the second coverage level)
  • measures RSRP> RSRP2.
  • the UE selects coverage level 2 (ie, the third coverage level).
  • the terminal device determines a PRACH transmit power according to the current access coverage level and the RSRP measured by the terminal device.
  • the terminal device determines the PRACH transmit power according to the current access coverage level and the RSRP measured by the terminal device, including: when the current access coverage level is the first coverage level or the second coverage level, The PRACH transmission power is determined according to the RSRP measured by the terminal device.
  • the terminal device may estimate the downlink path loss value according to the RSRP, and further determine the PRACH transmit power, and determine the PRACH transmit power by referring to the following calculation.
  • P CMAX is the maximum transmit power preset by the terminal device.
  • the NarrowBand_Preamble_Received_Target_Power is the target power level preset by the network device when the preamble detection performance is satisfied;
  • the PL is the estimated downlink path loss value of the terminal device, obtained by the RSRP measurement value and the transmit power of the CRS signal.
  • the terminal device may be These two parameter values are obtained through system messages.
  • determining that the PRACH transmission power is a preset maximum PRACH transmission power.
  • the terminal device can use P CMAX (that is, the preset maximum PRACH transmission power) as the transmission power on the PRACH channel in order to ensure the signal coverage capability to a certain extent. No adjustments are made.
  • P CMAX that is, the preset maximum PRACH transmission power
  • the terminal device determines the PUSCH transmit power according to the number of repetitions of the PUSCH and the RSRP measured by the terminal device.
  • the number of repetitions of the PUSCH may refer to the number of copies that are copied in one data transmission when the same data is transmitted through the PUSCH channel. For example, if the data is copied twice in one PUSCH transmission, the number of repetitions of the PUSCH is 2.
  • the network device may detect the strength value of the PRACH channel in real time, determine the number of repetitions of the PUSCH according to the strength value of the PRACH channel, and send the number of repetitions to the terminal device by using signaling or system messages.
  • the network device may determine that the number of repetitions of the PUSCH is 2, if the strength value of the PRACH channel If the third strength threshold is greater than or equal to the fourth strength threshold, the number of repetitions of the PUSCH may be determined to be 1. If the strength of the PRACH channel is greater than the fourth strength threshold, the number of repetitions of the PUSCH may be determined as 0.
  • the terminal device may estimate the downlink path loss value according to the RSRP, and may determine the PUSCH transmit power according to the following formula, in units of (dBm):
  • i is the current time slot
  • c is the current serving cell of the terminal device
  • PCMAX is the maximum PUSCH transmit power of the UE.
  • M PUSCH,c is the number of subcarriers, the value is 1/4 for single-tone 3.75K, 1 for single carrier 15K, and the number of subcarriers for multi-tone (multi-tone).
  • the range is ⁇ 3, 6, 12 ⁇ ;
  • PL is the estimated downlink path loss value of the UE, obtained by RSRP (RS Received Power) measurement value and Cell specific Reference Signal transmission power.
  • the UE acquires these two parameters by using a system message. value.
  • P O_PUSCH,c is the expected receiving power level of the network device, which is determined by the network device, and reflects the expected received power spectrum level of the network device when the PUSCH demodulation performance requirement is met; ⁇ is the path loss compensation factor.
  • the terminal device may use the preset maximum PUSCH transmit power as the current PUSCH transmit power.
  • the terminal device after determining that the network is in a congested state, determines a current access coverage level according to the actually measured RSRP value, and further determines a current PRACH transmission power according to the current access coverage level and the RSRP. And, the terminal device can determine the PUSCH transmission power by the number of PUSCH repetitions determined by the signal strength of the PRACH and the RSRP.
  • the terminal device can select the transmit power and the access coverage level according to the actual coverage of the signal, and reduce the chance that the terminal device uses the maximum PRACH transmit power and the maximum PUSCH transmit power to transmit signals, and at the same time, even if the random access fails, the access attempts If the RSRP value does not change, the access coverage level will not increase, and the PRACH transmit power will not increase, which saves the power consumption overhead of the terminal device.
  • FIG. 7 is a schematic flowchart of the power adjustment method provided by the present application on the terminal device side.
  • FIG. 7 illustrates another implementation manner in which the terminal device determines the PUSCH transmit power and the PRACH transmit power according to the RSRP, and may include:
  • the terminal device determines the number of PUSCH repetitions and the current number of access attempts.
  • the terminal device may try to access again and record the current number of access attempts.
  • the terminal device may determine the number of PUSCH repetitions according to the intensity value of the PRACH channel.
  • the terminal device may also measure the RSRP, determine the current access coverage level according to the RSRP, and determine the PUSCH repetition number according to the current access coverage level.
  • the terminal device calculates the PRACH transmit power according to the RSRP measured by the terminal device, the number of repetitions of the PUSCH, and the current number of access attempts.
  • the terminal device can use Equation 1 for power control:
  • P CMAX is the maximum transmit power preset by the terminal device.
  • NarrowBand_Preamble_Received_Target_Power is the target power level expected by the network device when the preamble detection performance is satisfied;
  • PL is the estimated downlink path loss value of the terminal device, obtained by the RSRP measurement value and the transmit power of the CRS signal, and in one embodiment, the terminal device can These two parameter values are obtained through system messages.
  • the terminal device calculates a PUSCH transmit power according to the RSRP measured by the terminal device.
  • the terminal device when determining the PUSCH transmit power, may perform power control using Equation 2 regardless of the number of repetitions:
  • i is the current time slot
  • c is the current serving cell of the terminal device
  • PCMAX is the maximum PUSCH transmit power of the UE.
  • M PUSCH,c is the number of subcarriers, the value is 1/4 for single-tone 3.75K, 1 for single carrier 15K, and the number of subcarriers for multi-tone (multi-tone).
  • the range is ⁇ 3, 6, 12 ⁇ ;
  • PL is the estimated downlink path loss value of the UE, obtained by RSRP (RS Received Power) measurement value and Cell specific Reference Signal transmission power.
  • the UE acquires these two parameters by using a system message. value.
  • P O_PUSCH,c is the expected receiving power level of the network device, which is determined by the network device, and reflects the expected received power spectrum level of the network device when the PUSCH demodulation performance requirement is met; and is adjusted to the path loss compensation factor.
  • the terminal device can comprehensively consider the RSRP, the number of access attempts, and the number of repetitions of the PUSCH to determine the PRACH transmit power.
  • the PRACH transmit power is independent of the access coverage level, and can enrich the power control of the terminal device for the PRACH transmit power and the PUSCH transmit power to some extent.
  • the transmit power determined by the power control method shown in the embodiment of the present invention is less than or equal to the maximum transmit power.
  • the opportunity to transmit signals by using the maximum transmit power may be reduced to some extent. To save power consumption of the terminal device.
  • FIG. 8 is a schematic structural diagram of a terminal device provided by the present application.
  • the terminal device shown in FIG. 8 may include:
  • the first determining module 801 is configured to determine whether the current network is in a congested state.
  • the measuring module 802 is configured to measure a reference signal received power of the terminal device when the current network is in a congested state.
  • the second determining module 803 is configured to determine a PRACH transmit power and a PUSCH transmit power according to the reference signal received power measured by the terminal device.
  • the second determining module 803 is specifically configured to determine a current access coverage level according to the reference signal received power measured by the terminal device, and according to the current access coverage level and the reference measured by the terminal device.
  • the signal received power determines the PRACH transmit power.
  • the second determining module 803 is specifically configured to: when the received power of the reference signal measured by the terminal device is less than the first preset power threshold, determine that the current access coverage level is the first coverage level; When the received power of the reference signal measured by the terminal device is greater than or equal to the first preset power threshold and less than the second preset power threshold, determining that the current access coverage level is the second coverage level; when the terminal device measures the reference When the signal receiving power is greater than or equal to the second preset power threshold, determining that the current access coverage level is the third coverage level; wherein the first coverage level is less than the second coverage level, and the second coverage level is less than the third Coverage level.
  • the second determining module 803 is specifically configured to: when the current access coverage level is the first coverage level or the second coverage level, determine the PRACH transmission power according to the reference signal received power measured by the terminal device. .
  • the second determining module 803 is specifically configured to determine that the PRACH transmit power is a preset maximum PRACH transmit power if the current access coverage level is a third coverage level.
  • the terminal device further includes: a receiving module, configured to receive a repetition quantity of the PUSCH delivered by the network device, where the number of repetitions of the PUSCH is determined by the network device according to an intensity value of the PRACH channel.
  • the second determining module 803 is specifically configured to determine a PUSCH transmit power according to the number of repetitions of the PUSCH and the reference signal received power measured by the terminal device.
  • the first determining module 801 is configured to receive a congestion indication parameter that is sent by the network device, and determine, according to the congestion indication parameter sent by the network device, whether the current network is in a congested state.
  • the congestion indication parameter includes a backoff index in the random access response, the backoff index is used to indicate a waiting time for the terminal device to perform random access, and the second determining module 803 is specifically configured to: If the backoff index in the random access response sent by the network device is not zero, it is determined that the current network state is in a congested state; if the backoff index in the random access response delivered by the network device is zero, it is determined that the current network state is not In a state of congestion.
  • the congestion indication parameter includes an access prohibition function parameter in the system message
  • the second determining module 803 is specifically configured to: if the access prohibition function parameter in the system message is in an activated state, determine the current The network is in a congested state; if the access prohibition function parameter in the system message is in an inactive state, it is determined that the current network is not in a congested state.
  • FIG. 9 illustrates a terminal device provided by some embodiments of the present application.
  • the terminal device may include: one or more terminal processors 901, a memory 902, a communication interface 903, a receiver 905, a transmitter 906, a coupler 907, an antenna 908, a user interface 902, and an input and output module. (including audio input and output module 910, key input module 911, display 912, etc.). These components may be connected by bus 904 or other means, and FIG. 9 is exemplified by a bus connection. among them:
  • the communication interface 903 can be used for communication between the terminal device and other communication devices, such as network devices.
  • the network device may be the network device shown in FIG.
  • the communication interface 903 may be a Long Term Evolution (LTE) (4G) communication interface, or may be a communication interface of 5G, future new air interface, and CIOT.
  • the terminal device may also be configured with a wired communication interface 903, such as a Local Access Network (LAN) interface.
  • LAN Local Access Network
  • Transmitter 906 can be used to perform transmission processing, such as signal modulation, on signals output by terminal processor 901.
  • Receiver 905 can be used to perform reception processing, such as signal demodulation, on the mobile communication signals received by antenna 908.
  • transmitter 906 and receiver 905 can be viewed as a wireless modem.
  • the number of the transmitter 906 and the receiver 905 may each be one or more.
  • the antenna 908 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line.
  • the coupler 907 is for dividing the mobile communication signal received by the antenna 908 into multiple channels and distributing it to a plurality of receivers 905.
  • the terminal device may further include other communication components such as a GPS module, a Bluetooth module, a Wireless Fidelity (Wi-Fi) module, and the like.
  • the terminal device can also support other wireless communication signals, such as satellite signals, short-wave signals, and the like, without being limited to the wireless communication signals described above.
  • the terminal device can also be configured with a wired network interface (such as a LAN interface) to support wired communication.
  • the input and output module can be used to implement interaction between the terminal device and the user/external environment, and can mainly include an audio input and output module 910, a key input module 911, a display 912, and the like. Specifically, the input and output module may further include: a camera, a touch screen, a sensor, and the like. The input and output modules communicate with the terminal processor 901 through the user interface 909.
  • Memory 902 is coupled to terminal processor 901 for storing various software programs and/or sets of instructions.
  • memory 902 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the memory 902 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as ANDROID, IOS, WINDOWS, or LINUX.
  • the memory 902 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.
  • the memory 902 can also store a user interface program, which can realistically display the content image of the application through a graphical operation interface, and receive user control operations on the application through input controls such as menus, dialog boxes, and keys. .
  • the memory 902 can be used to store an implementation program of the resource allocation method provided by one or more embodiments of the present application on the terminal device side.
  • Terminal processor 901 can be used to read and execute computer readable instructions. Specifically, the terminal processor 901 can be configured to invoke a program stored in the memory 912 to execute:
  • the terminal device can be the terminal 201 in the system shown in FIG. 2, and can be implemented as a mobile device, a mobile station, a mobile unit, a wireless unit, a remote unit, a user agent, and a mobile client. And so on.
  • the terminal device shown in FIG. 9 is only one implementation manner of the embodiment of the present application. In actual applications, the terminal device may further include more or fewer components, which are not limited herein.
  • the network device may include one or more network device processors 1001, a memory 1002, a communication interface 1003, a transmitter 1005, a receiver 1006, a coupler 1007, and an antenna 1008. These components can be connected by bus 1004 or other types, and FIG. 10 is exemplified by a bus connection. among them:
  • Communication interface 1003 can be used to communicate with network devices and other communication devices, such as terminal devices or other network devices.
  • the terminal device may be the terminal device shown in FIG. 9.
  • the communication interface 1003 communication interface 903 may be a Long Term Evolution (LTE) (4G) communication interface, or may be a 5G or a future communication interface of a new air interface.
  • LTE Long Term Evolution
  • the network device may also be configured with a wired communication interface 1003 to support wired communication.
  • the backhaul link between one network device and other network devices may be a wired communication connection.
  • Transmitter 1005 can be used to perform transmission processing, such as signal modulation, on signals output by network device processor 1001.
  • Receiver 1006 can be used to perform reception processing on the mobile communication signals received by antenna 1008. For example, signal demodulation.
  • transmitter 1005 and receiver 1006 can be viewed as a wireless modem. In the network device, the number of the transmitter 1005 and the receiver 1006 may each be one or more.
  • the antenna 1008 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line.
  • the coupler 1007 can be used to divide the mobile pass signal into multiple channels and distribute it to a plurality of receivers 1006.
  • Memory 1002 is coupled to network device processor 1001 for storing various software programs and/or sets of instructions.
  • memory 1002 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the memory 1002 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as uCOS, VxWorks, or RTLinux.
  • the memory 1002 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.
  • the network device processor 1001 can be used to perform wireless channel management, implement call and communication link establishment and teardown, and provide cell handover control and the like for users in the control area.
  • the network device processor 1001 may include: an Administration Module/Communication Module (AM/CM) (a center for voice exchange and information exchange), and a Basic Module (BM) (for Complete call processing, signaling processing, radio resource management, radio link management and circuit maintenance functions), code conversion and sub-multiplexer (TCSM) (for multiplexing demultiplexing and code conversion functions) )and many more.
  • AM/CM Administration Module/Communication Module
  • BM Basic Module
  • TCSM code conversion and sub-multiplexer
  • the network device processor 1001 can be used to read and execute computer readable instructions.
  • network device processor 1001 may invoke a program in memory 1002 to perform the following steps:
  • the network device processor 1001 can be used to invoke a program stored in the memory 1002, such as a power adjustment method provided by one or more embodiments of the present application, on a network device side, and execute the program.
  • a program stored in the memory 1002 such as a power adjustment method provided by one or more embodiments of the present application, on a network device side, and execute the program.
  • the instructions are not described here.
  • the network device can be the network device 202 in the system shown in FIG. 2, and can be implemented as a base transceiver station, a wireless transceiver, a basic service set (BSS), an extended service set (ESS), a NodeB, an eNodeB. , access point or TRP and more.
  • BSS basic service set
  • ESS extended service set
  • NodeB NodeB
  • eNodeB access point or TRP and more.
  • the network device shown in FIG. 10 is only one implementation manner of the embodiment of the present application. In actual applications, the network device may further include more or fewer components, which are not limited herein.
  • a communication device which can include a processing element and a storage element, wherein the storage element can be used to store a program, and when the program is called by the processing element, the application can be implemented.
  • the communication device can be a communication chip.
  • a computer readable storage medium stores a program, and when the program is executed by a processor, the method shown in the terminal device in the present application may be implemented or implemented. The method shown on the network device.
  • Yet another embodiment of the present invention also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method described in the above method embodiments.
  • the computer readable storage medium may be an internal storage unit of the terminal described in any of the foregoing embodiments, such as a hard disk or a memory of the terminal.
  • the computer readable storage medium may also be an external storage device of the computer, such as a plug-in hard disk equipped on the computer, a smart memory card (SMC), and a Secure Digital (SD) card. , Flash Card, etc.
  • the computer readable storage medium may also include both an internal storage unit of the terminal and an external storage device.
  • the computer readable storage medium is for storing the program and other programs and data required by the terminal.
  • the computer readable storage medium can also be used to temporarily store data that has been output or is about to be output.
  • the principle of the computer to solve the problem in the embodiment of the present invention is similar to the method embodiment of the present invention. Therefore, the implementation of the computer can refer to the implementation of the method, and is not described here.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

La présente invention concerne un procédé de réglage de puissance et un dispositif associé, le procédé consistant : à déterminer si le réseau actuel est dans un état encombré ; si le réseau actuel est dans l'état encombré, à mesurer une puissance de réception de signal de référence du dispositif terminal ; à déterminer une puissance de transmission PRACH et une puissance de transmission PUSCH en fonction de la puissance de réception de signal de référence mesurée par le dispositif terminal. La présente invention met en œuvre ledit procédé, et lorsqu'un réseau est dans un état encombré, permet d'éviter un brouillage avec d'autres utilisateurs dans une certaine mesure et de réduire la consommation d'énergie d'un dispositif terminal.
PCT/CN2018/084575 2018-04-26 2018-04-26 Procédé de réglage de puissance et dispositif associé Ceased WO2019205046A1 (fr)

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CN116684951A (zh) * 2023-07-18 2023-09-01 中国联合网络通信集团有限公司 发射功率调整方法、装置及存储介质

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