WO2017133443A1 - Procédé de régulation de puissance en liaison montante dans une bande de fréquences sans licence et dispositif correspondant - Google Patents

Procédé de régulation de puissance en liaison montante dans une bande de fréquences sans licence et dispositif correspondant Download PDF

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Publication number
WO2017133443A1
WO2017133443A1 PCT/CN2017/071426 CN2017071426W WO2017133443A1 WO 2017133443 A1 WO2017133443 A1 WO 2017133443A1 CN 2017071426 W CN2017071426 W CN 2017071426W WO 2017133443 A1 WO2017133443 A1 WO 2017133443A1
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WIPO (PCT)
Prior art keywords
terminal
base station
interference
power
communication node
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PCT/CN2017/071426
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English (en)
Chinese (zh)
Inventor
王加庆
潘学明
司倩倩
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电信科学技术研究院
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Publication of WO2017133443A1 publication Critical patent/WO2017133443A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/143—Downlink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an unlicensed frequency band uplink power control method and related equipment.
  • LTE Long Term Evolution
  • U-LTE or LTE-U Unlicensed LTE
  • Unlicensed spectrum can be shared by multiple wireless communication systems, such as Bluetooth, WiFi, etc., and unlicensed spectrum resources are used by multiple systems to preempt resources. Therefore, the coexistence between LTE-U deployed by different operators and wireless communication systems such as LTE-U and WiFi is the research focus and difficulty.
  • the 3GPP requires that the wireless communication systems such as LTE-U and WiFi be coexisted equitably, and the unlicensed frequency band is used as a secondary carrier to be assisted by the primary carrier of the licensed frequency band.
  • Listening before Talk LBT is the basic means of LTE-U competing access.
  • the channel access mechanism adopted by the 802.11 system is called the carrier sense/collision avoidance (CSMA/CA) mechanism.
  • the way in which the WiFi preempts resources on the unlicensed spectrum is as shown in Figure 1.
  • the specific process is as follows: first, the channel is monitored, when the channel is The idle time reaches the DCF Inter-Frame Space (DIFS; distributed channel access), and the current channel is determined to be an idle channel; then each station waiting for the access channel enters a random backoff phase. Used to avoid collisions between multiple sites on the same resource. In order to ensure fairness, it is stipulated that each site cannot occupy unlicensed spectrum resources for a long period of time. When the occupied time reaches a certain time or the data transmission reaches the upper limit, the occupied unlicensed spectrum resources need to be released for other systems to seize resources.
  • DIFS DCF Inter-Frame Space
  • LBT Clear Channel Assessment
  • FBE Frame Based Equipment
  • LBE load-based devices
  • Figure 2a is a schematic diagram of the ETSI FBE channel access mechanism.
  • Figure 2b shows the channel access mechanism of the ETSI LBE option B.
  • CCA detection is performed at a fixed position of the frame structure. As long as the channel has a CCA period judged to be empty, the channel is immediately accessed, and a data transmission process is initiated.
  • a CCA period is not less than 20 us, and the channel transmission occupation time is relatively fixed. The minimum 1ms is 10ms maximum, and the idle period is at least 5% of the channel occupation time.
  • the device performs new CCA detection and accesses the channel again during the CCA time at the end of the idle period.
  • the channel occupation time plus the idle period is a fixed value called frame period.
  • the LBE access mechanism is similar to the CSMA/CA mechanism of WiFi.
  • the time and starting point of each transmission channel are variable, and extended CCA detection is performed before the channel is acquired.
  • CW contention window
  • N a random factor N is generated until the channel idle time reaches N times of the CCA time, and the channel is idle, and the access channel initiates a data transmission process, and the largest channel is occupied.
  • the time is 13ms.
  • ETSI LBE is divided into two options: rotation A (option A) and option B (option B).
  • the ETSI option B competition window is fixed and is the most basic LBE form.
  • LBT category 1 does not require LBT
  • LBT category 2 has a fixed backoff value, does not need to be randomly rolled back before transmission initiation (burst), and only performs a single CCA detection.
  • Channel FBE is a special case of LBT category 2
  • LBT category 3 and LBT category 4 both use a random backoff value similar to CSMA/CA
  • LBT category 3 uses a fixed contention window
  • ETSI LBE option B belongs to LBT category 3
  • the LBT category 4 is based on the ETSI LBE option B correction, using a load-based LBT, and the contention window is exponentially increasing or semi-statically configured. Since WiFi uses the CSMA/CA access mechanism, the competition window exponentially expands.
  • LBT type 4 In order to achieve fair coexistence of LTE-U and WiFi, 3GPP requires that LBT type 4 should be adopted at least in the downlink transmission of LTE-U.
  • the uplink LBT scheme of LTE-U may adopt any of the four categories, and there is no conclusion yet.
  • the LTE-U uses the energy detection method to identify the WiFi node, but the method is incapable of interfering with the interference between the WiFi and the LTE-U caused by the following scenarios.
  • the base station eNB
  • the base station schedules the uplink transmission of the UE1
  • the STA1 that is farther from the UE1 on the other side of the base station does not detect the presence of the UE1, so that the access channel sends a signal to the AP, causing the signal of the STA1 to be
  • the uplink signal of UE1 causes interference
  • STA1 is a hidden node of UE1.
  • the terminal can only perform uplink channel access by the base station, and the uplink channel access opportunity is much less than that of the WiFi that does not need to be scheduled.
  • the LTE system adopts uplink power control to ensure that the transmission power of the terminal satisfies the requirements of good reception of the base station without causing interference to other cells.
  • the uplink power control of LTE consists of three parts. The first part is the basic open-loop operating point, the second part is the dynamic offset, and the third part is the bandwidth-related power offset.
  • the basic open loop operating point is the decisive factor for uplink power control, can be expressed as: P 0 + ⁇ ⁇ PL, where P 0, the terminal signal reaches the reference power at a base station, PL represents path loss, [alpha] indicates a path loss compensation factor , ⁇ takes 1 to represent the full compensation of the path loss.
  • the power level of the terminal after the signal arrives at the base station is similar to the reference power P 0 .
  • the reference power value is only greater than the base station receiving sensitivity, and the reference power value is semi-static by the upper layer through Radio Resource Control (RRC) signaling. Configured for each terminal. However, in the unlicensed frequency band, there is no coordination between different systems.
  • RRC Radio Resource Control
  • WiFi believes that the channel is considered idle as long as the energy detection result is less than -62 dBm (decibel milliwatts), which is much higher than the receiving sensitivity of LTE. If the transmission power of the terminal is small, the WiFi node in the vicinity of the UE accesses the channel, and a transmission collision occurs. The higher transmission power of the WiFi may seriously affect the uplink performance of the LTE-U; if the terminal always uses full power to transmit In turn, the terminal power consumption is too high, power consumption is wasted, and battery life is affected.
  • -62 dBm decibel milliwatts
  • the embodiments of the present invention provide an unlicensed frequency band uplink power control method and related equipment, which are used to provide an uplink power control scheme applicable to an unlicensed frequency band LTE system.
  • an embodiment of the present invention provides an unlicensed frequency band uplink power control method, including:
  • the base station acquires interference intensity information of the interference communication node itself and/or the terminal;
  • the base station configures the terminal to perform uplink signal transmission according to the uplink transmit power in an unlicensed frequency band.
  • the interfering communication node is a non-long-term evolution LTE node or a long-term evolution LTE-U node that is deployed by another carrier on an unlicensed frequency band.
  • the uplink transmit power meets:
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the base station is greater than the power of any one of the interfering communication nodes to reach the base station;
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the interference communication node and/or the base station is greater than a first preset threshold.
  • the base station configures the terminal to perform uplink signal transmission according to the uplink transmit power in an unlicensed frequency band, including:
  • the base station configures, by semi-static signaling or dynamic signaling, a reference power value of the uplink transmit power of the terminal in an unlicensed frequency band.
  • the determining, by the base station, the uplink transmit power of the terminal according to the interference strength information including:
  • the determining, by the base station, the power target value of the terminal according to the interference strength information including:
  • the base station determines, according to the interference strength information, that the interference communication node in the vicinity of the base station has a strong interference communication node whose interference strength is greater than a second preset threshold, determining that the power target value of the terminal meets:
  • the power target value is greater than the power of the interference signal of the strong interfering communication node to reach the base station;
  • the power of the uplink signal of the terminal when the uplink signal arrives at the base station is not less than the power target value, and the power of the uplink signal of the terminal reaches the power of the strong interference communication node is greater than a first preset threshold; or
  • the power target value is the power of the uplink signal sent by the terminal at the maximum transmit power to the base station.
  • the determining, by the base station, the power target value of the terminal according to the interference strength information including:
  • the base station determines, according to the interference strength information, that the interference communication node in the vicinity of the base station does not have a strong interference communication node whose interference strength is greater than a second preset threshold, and the interference communication node in the periphery of the terminal.
  • the strong interference communication node having the interference strength greater than the second preset threshold determines that the power target value of the terminal is satisfied: the power target value is greater than the first preset threshold.
  • the determining, by the base station, the power target value of the terminal according to the interference strength information including:
  • the base station determines, according to the interference strength information, that the neighboring interference communication node does not have a communication node whose interference strength is greater than a second preset threshold, and determines that the power target value of the terminal is not lower than a third preset threshold.
  • the power target value is obtained by adjusting a reference power value when an uplink signal of the terminal reaches the base station.
  • the base station acquires interference strength information of an interference communication node in itself and/or the terminal, including:
  • the base station performs channel measurement in an idle time period of the unlicensed band channel, and obtains interference intensity information of the interfering communication node around itself according to the measurement result; and/or,
  • the base station performs pre-call monitoring on the unlicensed band channel, and obtains interference intensity information of the interfering communication node in its vicinity according to the result of the pre-call monitoring; and/or,
  • the base station detects an interference communication node of a non-LTE system in its vicinity, and obtains interference strength information of the interference communication node of the non-LTE system; and/or,
  • the base station detects a type of an interference communication node of a non-LTE system in its vicinity, and determines interference strength information of the interference communication node; and/or,
  • the base station detects a long-term evolution LTE-U node that is deployed by other carriers in the vicinity of the unlicensed frequency band, and obtains interference strength information of the LTE-U node of other operators; and/or,
  • the base station receives the interference strength information of the interference communication node that is reported by the terminal, and the interference strength information reported by the terminal is obtained by the terminal after performing channel measurement on the unlicensed frequency band channel, according to the measurement result. Or the interference strength information reported by the terminal is obtained by the terminal detecting an interference communication node of a non-LTE system in the vicinity of the terminal, or the interference strength information reported by the terminal is detected by the terminal. The type of interfering communication node of the LTE system is determined later.
  • the first preset threshold is not less than a threshold value of whether the interference communication node detects whether the channel is idle.
  • the embodiment of the present invention further provides an unlicensed frequency band uplink power control apparatus, including:
  • An acquiring module configured to acquire interference intensity information of an interference communication node between the base station and/or the terminal;
  • a processing module configured to determine, according to the interference strength information acquired by the acquiring module, an uplink transmit power of the terminal
  • a configuration module configured to configure, by the terminal, to perform uplink signal transmission according to the uplink transmit power in an unlicensed frequency band.
  • the interfering communication node is a non-long-term evolution LTE node or a long-term evolution LTE-U node that is deployed by another carrier on an unlicensed frequency band.
  • the uplink transmit power meets:
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the base station is greater than the power of any one of the interfering communication nodes to reach the base station;
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the interference communication node and/or the base station is greater than a first preset threshold.
  • the configuration module is specifically configured to:
  • the reference power value of the uplink transmit power of the terminal in the unlicensed frequency band is configured by semi-static signaling or dynamic signaling.
  • the processing module is specifically configured to:
  • Determining a power target value of the terminal according to the interference intensity information, and determining the end according to the power target value The uplink transmit power of the terminal, wherein the power target value characterizes a minimum power value when the uplink signal of the terminal arrives at the base station.
  • the processing module is specifically configured to:
  • the power target value is greater than the power of the interference signal of the strong interfering communication node to reach the base station;
  • the power of the uplink signal of the terminal when the uplink signal arrives at the base station is not less than the power target value, and the power of the uplink signal of the terminal reaches the power of the strong interference communication node is greater than a first preset threshold; or
  • the power target value is the power of the uplink signal sent by the terminal at the maximum transmit power to the base station.
  • the processing module is specifically configured to:
  • the interference strength information Determining, according to the interference strength information, that the interfering communication node in the vicinity of the base station does not have a strong interfering communication node whose interference strength is greater than a second preset threshold, and the interference strength exists in the interfering communication node around the terminal
  • the strong interference communication node that is greater than the second preset threshold determines that the power target value of the terminal is satisfied: the power target value is greater than the first preset threshold.
  • the processing module is specifically configured to:
  • the power target value is obtained by adjusting a reference power value when an uplink signal of the terminal reaches the base station.
  • the acquiring module is specifically configured to:
  • the interference strength information is obtained by the terminal after performing channel measurement on the unlicensed frequency band channel according to the measurement result, or the interference strength information reported by the terminal is detected by the terminal by the interference communication node of the non-LTE system surrounding the terminal. Obtaining, or the interference strength information reported by the terminal is determined by the terminal detecting a type of an interference communication node of a non-LTE system in its vicinity.
  • an embodiment of the present invention further provides a base station, where the base station includes a processor, a memory, and a transceiver, where the transceiver is configured to receive and transmit data under the control of the processor, where the preset is stored in the memory.
  • the interfering communication node is a non-long-term evolution LTE node or a long-term evolution LTE-U node that is deployed by another carrier on an unlicensed frequency band.
  • the uplink transmit power meets:
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the base station is greater than the power of any one of the interfering communication nodes to reach the base station;
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the interference communication node and/or the base station is greater than a first preset threshold.
  • the processor instructs the transceiver to configure, by semi-static signaling or dynamic signaling, a reference power value of the uplink transmit power of the terminal in an unlicensed frequency band.
  • the processor determines a power target value of the terminal according to the interference strength information, and determines an uplink transmit power of the terminal according to the power target value, where the power target value represents the terminal The minimum power value when the uplink signal arrives at the base station, determining that the uplink transmit power of the terminal is: the power when the uplink signal sent by the terminal according to the uplink transmit power reaches the base station, not less than the power target value.
  • the processor determines, according to the interference strength information, that the interference communication node in the vicinity of the base station has a strong interference communication node whose interference strength is greater than a second preset threshold, and determines a power target value of the terminal. Satisfy:
  • the power target value is greater than the power of the interference signal of the strong interfering communication node to reach the base station;
  • the power of the uplink signal of the terminal when the uplink signal arrives at the base station is not less than the power target value, and the power of the uplink signal of the terminal reaches the power of the strong interference communication node is greater than a first preset threshold; or
  • the power target value is the power of the uplink signal sent by the terminal at the maximum transmit power to the base station.
  • the processor determines, according to the interference strength information, the interference channel around the base station.
  • a strong interfering communication node having an interference strength greater than a second preset threshold is not present in the information node, and a strong interfering communication node having an interference strength greater than a second preset threshold is present in the interfering communication node around the terminal, and the terminal is determined.
  • the power target value is satisfied: the power target value is greater than the first preset threshold.
  • the processor determines, according to the interference strength information, that the neighboring interfering communication node does not have a communication node whose interference strength is greater than a second preset threshold, and determines that the power target value of the terminal is not lower than the first Three preset thresholds.
  • the power target value is obtained by adjusting a reference power value when an uplink signal of the terminal reaches the base station.
  • the processor performs channel measurement by using a transceiver in an idle time period of the unlicensed band channel, and obtains interference intensity information of the interfering communication node around the base station according to the measurement result; and/or,
  • the processor performs pre-call monitoring on the unlicensed band channel by the transceiver, and obtains interference intensity information of the interfering communication node around the base station according to the result of the pre-call monitoring; and/or,
  • the processor detects, by the transceiver, an interference communication node of the non-LTE system in the vicinity of the base station, and obtains interference strength information of the interference communication node of the non-LTE system; and/or,
  • the processor detects, by the transceiver, a type of the interference communication node of the non-LTE system surrounding the base station, and determines interference intensity information of the interference communication node; and/or,
  • the processor detects, by the transceiver, a long-term evolution LTE-U node that is deployed by other carriers in the vicinity of the base station on the unlicensed frequency band, and obtains interference strength information of the LTE-U node of the other carrier; and/or,
  • the transceiver Receiving, by the transceiver, the interference strength information of the interfering communication node in the periphery of the terminal that is reported by the terminal, where the interference strength information reported by the terminal is subjected to channel measurement by the terminal to the unlicensed frequency band channel, according to the measurement result Obtaining, or the interference strength information reported by the terminal is obtained by the terminal detecting an interference communication node of a non-LTE system in the vicinity of the terminal, or the interference strength information reported by the terminal is detected by the terminal The type of interfering communication node of the non-LTE system is determined later.
  • the base station determines the uplink transmit power of the terminal according to the interference strength information of the interference communication node in the vicinity of the terminal and/or the terminal, so as to avoid the power of the interference communication node being large.
  • the base station cannot detect the terminal accessing the channel and causing the terminal to collide with the interfering communication node, the problem that the terminal's uplink transmit power is unrestricted and the power consumption is too large affects the battery life is avoided.
  • the uplink power control of the LTE system provides a solution.
  • FIG. 1 is a schematic diagram of a process of preempting resources of WiFi on an unlicensed spectrum
  • FIG. 2a is a schematic diagram of an ETSI FBE channel access mechanism
  • 2b is a schematic diagram of a channel access mechanism of the ETSI LBE option B;
  • 3 is a schematic diagram of a hidden node
  • FIG. 4 is a schematic flowchart of a method for controlling, by an eNB, an uplink power of a terminal in an unlicensed frequency band according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of a scenario of a communication node with strong interference around a base station according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a scenario of a communication node with strong interference around a terminal according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a scenario of a communication node where there is no strong interference between the base station and the terminal in the embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an unlicensed frequency band uplink power control apparatus according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the detailed method for controlling the uplink power of the terminal in the unlicensed frequency band by the base station is as follows:
  • Step 401 The base station acquires interference intensity information of the interference communication node itself and/or the terminal.
  • the base station acquires interference strength information of a non-LTE node or an LTE-U node of another carrier. And/or, the base station acquires interference strength information of a non-LTE node around the terminal or an LTE-U node of another operator.
  • the base station acquires interference intensity information of the interference communication node in itself and/or the terminal, including but not limited to the following implementation manners:
  • the base station performs channel measurement in an idle time period of the unlicensed band channel, and obtains interference intensity information of the interfering communication node around itself according to the measurement result;
  • the base station performs pre-call monitoring on the unlicensed band channel, and obtains interference intensity information of the interfering communication node around itself according to the result of pre-call monitoring;
  • the base station detects the interfering communication node of the non-LTE system in its vicinity, and obtains the interference strength information of the interfering communication node of the non-LTE system in its own periphery;
  • the base station detects the type of the interference communication node of the non-LTE system in its vicinity, and determines the interference communication node.
  • Interference intensity information
  • the base station determines whether there is a WiFi site in the vicinity of the base station by detecting a beacon frame of the WiFi site.
  • the Beacon frame is a broadcast frame sent by the WiFi site, and the Beacon frame carries configuration information of the WiFi site.
  • the base station can also decode the preamble signal sent by the WiFi station to identify whether there is a WiFi station around itself.
  • the base station detects the LTE-U nodes of other operators in its vicinity, and obtains the interference strength information of the LTE-U nodes of other operators;
  • the base station identifies whether there are other operators' LTE-U sites in the vicinity of the carrier by detecting the carrier identifier carried in the received signal.
  • the base station receives the interference strength information of the communication node around the terminal reported by the terminal, and the interference strength information of the communication node around the terminal is obtained by the terminal performing channel measurement on the unlicensed band channel according to the measurement result; or the communication node around the terminal
  • the interference strength information is obtained by the terminal detecting the communication node of the non-LTE system in its vicinity; or the interference strength information reported by the terminal is determined by the terminal detecting the type of the interference communication node of the non-LTE system in its vicinity.
  • the terminal determines whether there is a WiFi site in the vicinity of the terminal by detecting a beacon frame of the WiFi site.
  • the Beacon frame is a broadcast frame sent by the WiFi site, and the Beacon frame carries configuration information of the WiFi site.
  • the terminal identifies the LTE-U site of other operators by detecting the carrier identifier carried in the received signal.
  • Step 402 The base station determines the uplink transmit power of the terminal according to the interference strength information of the interference communication node in the vicinity of the terminal and/or the terminal.
  • the uplink transmit power of the terminal determined by the base station satisfies any one of the following three conditions, or simultaneously meets the following three conditions:
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the base station is greater than the power of the base station and/or any one of the interference communication nodes around the terminal that arrives at the base station in step 401.
  • Condition 2 The uplink signal sent by the terminal according to the uplink transmit power reaches the power of any one of the interfering communication nodes in the base station and/or the terminal in step 401, which is greater than the first preset threshold.
  • the first preset threshold is not less than a threshold value that interferes with whether the communication node detects whether the channel is idle.
  • Condition 3 The power of the uplink signal sent by the terminal according to the uplink transmit power to the base station is greater than the first preset threshold.
  • the first preset threshold is not less than a threshold value that interferes with whether the communication node detects whether the channel is idle.
  • the base station determines the power target value of the terminal according to the interference strength information of the interference communication node in the vicinity of the terminal and/or the terminal, and determines the uplink transmit power of the terminal according to the power target value, where the power target value is characterized.
  • the minimum power value of the uplink signal of the terminal when the uplink signal arrives at the base station is determined, and the uplink transmit power of the terminal is determined to be: the power of the uplink signal sent by the terminal according to the uplink transmit power to the base station is not less than the power target value.
  • the base station determines the power target value of the terminal in different manners according to different application scenarios, as follows:
  • the base station determines that there is a strong interfering communication node whose interference strength is greater than a second preset threshold in the interfering communication node in the vicinity of the terminal. In this scenario, whether there is a strong interfering communication node whose interference intensity is greater than a second preset threshold, the base station Determining that the power target value of the terminal meets one of the following conditions:
  • the power target value is greater than the power of the interference signal of the strong interfering communication node to reach the base station
  • the uplink signal of the terminal arrives at the base station, the power is not less than the power target value, and the uplink signal of the terminal reaches the power of the strong interference communication node is greater than the first preset threshold;
  • the power target value is the power of the uplink signal sent by the terminal to the base station with the maximum transmit power.
  • the first preset threshold is not less than a threshold value that interferes with whether the communication node detects whether the channel is idle.
  • the base station improves the uplink transmit power of the terminal in the case that it is determined that there is a strong interfering communication node in the vicinity thereof, so that the uplink signal of the terminal reaches the power of the base station, that is, the power target value exceeds the power of the strong interfering communication node to reach the base station; or
  • the power of the uplink signal of the terminal to reach the strong interference communication node exceeds a first preset threshold, for example, exceeds -62 dBm, where the -62 dBm is a threshold value for detecting whether the channel is idle by the WiFi station; or, due to the uplink transmit power of the terminal If the above two conditions are not met, that is, when the base station determines that the uplink transmit power of the terminal has been raised to the maximum value, the base station directly determines the power target value according to the maximum uplink transmit power of the terminal.
  • the base station determines that there is no strong interfering communication node whose interference strength is greater than the second preset threshold in the interfering communication node in the vicinity of the terminal, and determines that there is strong interference in the interfering communication node around the terminal that the interference strength is greater than the second preset threshold
  • the communication node determines that the power target value of the terminal is satisfied: the power target value is greater than the first preset threshold.
  • the first preset threshold is not less than a threshold value that interferes with whether the communication node detects whether the channel is idle.
  • the base station improves the uplink transmit power of the terminal when determining that there is no strong interfering communication node in the vicinity of the terminal, and determines that there is a strong interfering communication node around the terminal, so that the power of the uplink signal of the terminal reaches the base station is greater than the first pre-
  • the threshold value may be set. For example, the power of the uplink signal of the terminal when reaching the base station is greater than -62 dBm, and the -62 dBm is a threshold value for detecting whether the channel is idle by the WiFi station.
  • the base station determines that there is no communication node whose interference strength is greater than the second preset threshold in the interference communication node around the terminal, the base station determines that the power target value of the terminal is not lower than the third preset threshold.
  • the third preset threshold is smaller than the first preset threshold.
  • the base station determines that the uplink transmit power of the terminal only needs to be able to overcome the weak interference between the cells when the base station determines that there is no strong interfering communication node in the vicinity of the terminal, that is, the terminal can adopt a smaller uplink transmission.
  • the third preset threshold depends on the receiving sensitivity of the base station and the weak interference between the cells. This situation can be compatible with the uplink power control of the LTE system in the licensed band.
  • the power target value is mainly obtained by adjusting a reference power value when the uplink signal of the terminal reaches the base station.
  • the power target value is expressed as follows:
  • P PUSCH (i) min ⁇ P CMAX, 10log 10 (M PUSCH (i)) +
  • i denotes a subframe index
  • 10log 10 (M PUSCH (i)) denotes a bandwidth-dependent power offset, which is a fixed value in the case of bandwidth determination
  • P O_PUSCH (j) denotes a reference power value
  • ⁇ (j) PL represents a path loss, where ⁇ (j) is less than or equal to 1, indicating a compensation factor, and if ⁇ (j) is equal to 1 is expressed as full compensation
  • ⁇ TF (i) + f(i) represents a dynamic offset value.
  • the bandwidth-related power offset is a fixed value
  • the path loss is determined by the measurement, and the dynamic offset value is relatively small. Therefore, the reference power value is greatly affected by the power target value.
  • the reference power value may achieve the purpose of adjusting the power target value, and the sum of the reference power value and the bandwidth-related power offset value is approximately equal to the power target value.
  • Step 403 The base station configures the terminal to perform uplink signal transmission according to the uplink transmit power determined in step 402 in the unlicensed frequency band.
  • the base station determines the uplink transmit power of the terminal, which is mainly for determining the reference power value of the terminal. After determining the reference power value of the terminal, the base station configures the uplink transmit power of the terminal in the unlicensed band through semi-static signaling or dynamic signaling. Baseline power value.
  • the semi-static signaling is a high communication command
  • the dynamic signaling may be a physical uplink control channel (Physical Uplink Control Channel, PUCCH) signaling.
  • PUCCH Physical Uplink Control Channel
  • the first preset threshold, the second preset threshold, and the third preset threshold may be preset experience values or thresholds agreed by the protocol.
  • the following describes the process of the base station performing uplink power control on the terminal in the unlicensed frequency band by using three specific embodiments.
  • step a the base station acquires interference strength information of the non-LTE system and/or the communication node of other operators in the vicinity of the terminal or the terminal.
  • the base station measures the non-LTE system and/or other carrier's communication nodes in its vicinity to obtain interference strength information.
  • the specific measurement and detection methods include but are not limited to the following two types:
  • the base station can perform channel measurement and detection by using a time period in which the unlicensed frequency band does not schedule uplink or downlink transmission.
  • the base station determines the interference strength of the non-LTE communication node or the LTE-U communication node of other operators according to the measurement result of the unlicensed frequency band.
  • the base station determines whether there is a strong interference source around the base station according to the measured size of the Received Signal Strength Indicator (RSSI) of the LTE-U communication node of the non-LTE or other carrier.
  • RSSI Received Signal Strength Indicator
  • the base station can perform a Listen Before Talk (LBT) operation in the unlicensed frequency band, and determine the strength of the channel interference according to the result of the energy detection performed by the LBT.
  • LBT Listen Before Talk
  • the base station can detect the presence of the WiFi communication node.
  • the base station detects a beacon frame of WiFi or detects a WiFi signal, so that it can be confirmed whether there is WiFi in the periphery of the base station.
  • the terminal can measure and detect the non-LTE system and/or the communication node of the other operators in the manner of the base station, and report the interference strength information of the interference communication node that is obtained by the measurement to the base station.
  • the base station determines, according to the interference strength information of the interference communication node in the vicinity of the terminal, the interference strength information of the interference communication node around the terminal reported by the terminal, whether the base station and the terminal periphery have strong interference sources having a great influence on the reception performance, for example, The base station determines whether there is a WiFi station around the base station or the terminal according to its own measurement and detection result and the measurement and detection result of the terminal.
  • Step b The base station determines, according to the interference strength information of the non-LTE system and/or the communication node of the other carrier in the vicinity of the terminal or the terminal, the LTE-U communication node of the non-LTE or other carrier that affects its own receiving performance,
  • the uplink transmit power of the terminal is determined according to the interference strength information of the LTE-U communication node of the non-LTE or other operator.
  • STA1 is a hidden node of UE1, which will seriously affect the reception quality of the uplink signal of UE1.
  • the base station may determine, according to the interference strength caused by the STA1, a suitable power target value, where the power target value represents the power of the terminal after the uplink signal arrives at the base station.
  • the power target value is the reference power value.
  • the power target value is not limited to the reference power value.
  • the base station only needs to set the power target value of the uplink signal of the terminal to the base station to be set to be much higher than the power of the interference node signal to the base station, so that the interference source similar to the hidden node does not
  • the uplink signal has a significant impact.
  • the base station sets the uplink signal of the terminal to reach the power target value of the base station, so that the power value of the uplink signal of the terminal in the range that has a great influence on the receiving performance of the base station is greater than a set threshold, for example, Threshold
  • Threshold The value is -62dBm, which is only an example here. It is not excluded to set the threshold to other values, so that when the scheduled terminal performs uplink transmission, the interfering node near the base station cannot access the channel to avoid the occurrence of transmission collision.
  • the method provided by the specific embodiment can alleviate the interference of the hidden node, and can prevent the channel that the terminal is transmitting from being accessed by other systems.
  • the base station sets various parameters of the power control according to the determined power target value, thereby determining an uplink transmit power of the terminal.
  • the base station configures the uplink transmit power for the terminal through semi-static or dynamic signaling.
  • the base station can semi-statically configure the reference power according to the original LTE protocol, and can also configure the value of the reference power through dynamic signaling.
  • Step a is the same as the description of step a of the first embodiment, and details are not described herein again.
  • Step b The base station determines, according to the interference strength information of the non-LTE system and/or the communication node of the other carrier in the vicinity of the terminal or the terminal, that there is no LTE-U communication node of the non-LTE or other carrier that affects its own receiving performance. And determining that there is an LTE-U communication node of the non-LTE or other carrier that affects the receiving performance around the terminal, and determining the uplink transmit power of the terminal according to the interference strength information of the LTE-U communication node of the non-LTE or other carrier.
  • the base station may determine, according to the interference strength information of the interfering communication node around the terminal, a suitable power target value, where the power target value represents the power of the terminal after the uplink signal arrives at the base station.
  • the power target value is a reference power value.
  • the power target value in the implementation is not limited to the reference power value.
  • the base station may set the power target value to be greater than a preset threshold.
  • the preset threshold is near -62 dBm. This is only an example. In practice, the preset threshold is set to other values. Therefore, when the scheduled terminal performs uplink signal transmission, the interfering communication node around the terminal cannot access the channel, and the interfering communication node capable of accessing the channel when the terminal transmits cannot cause serious interference to the base station.
  • the method provided by the specific embodiment not only can effectively ensure the uplink transmission performance, but also does not need to use excessive power transmission by the terminal, which is beneficial to the terminal to save power.
  • the base station sets various parameters of the power control according to the determined power target value, thereby determining an uplink transmit power of the terminal.
  • the base station configures the uplink transmit power for the terminal through semi-static or dynamic signaling.
  • the base station can semi-statically configure the reference power according to the original LTE protocol, and can also be configured by dynamic signaling. Set the value of the reference power.
  • Step a is the same as the description of step a of the first embodiment, and details are not described herein again.
  • Step b The base station determines, according to the interference strength information of the non-LTE system and/or the communication node of the other carrier in the vicinity of the terminal or the terminal, that there is no LTE-U communication node of the non-LTE or other carrier that affects its own receiving performance. And determining that there is no LTE-U communication node of the non-LTE or other carrier that affects the receiving performance around the terminal, and determining that the uplink transmit power of the terminal is greater than a third preset threshold.
  • the base station sets the power target value of the terminal to a smaller value. For example, if the receiving performance is allowed, the difference between the power target value and the receiving sensitivity is set as much as possible.
  • the advantages of the uplink power control of the LTE system in the licensed band can be inherited.
  • an unlicensed frequency band uplink power control apparatus is also provided in the embodiment of the present invention.
  • the device mainly includes:
  • the obtaining module 801 is configured to acquire interference strength information of the interference communication node between the base station and/or the terminal;
  • the processing module 802 is configured to determine, according to the interference strength information acquired by the acquiring module, an uplink transmit power of the terminal;
  • the configuration module 803 is configured to configure the terminal to perform uplink signal transmission according to the uplink transmit power in an unlicensed frequency band.
  • the interfering communication node is a non-long-term evolution LTE node or a long-term evolution LTE-U node that is deployed by another carrier on an unlicensed frequency band.
  • the uplink transmit power meets:
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the base station is greater than the power of any one of the interfering communication nodes to reach the base station;
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the interference communication node and/or the base station is greater than a first preset threshold.
  • the configuration module is specifically configured to:
  • the reference power value of the uplink transmit power of the terminal in the unlicensed frequency band is configured by semi-static signaling or dynamic signaling.
  • the processing module is specifically configured to:
  • the processing module is specifically configured to:
  • the power target value is greater than the power of the interference signal of the strong interfering communication node to reach the base station;
  • the power of the uplink signal of the terminal when the uplink signal arrives at the base station is not less than the power target value, and the power of the uplink signal of the terminal reaches the power of the strong interference communication node is greater than a first preset threshold; or
  • the power target value is the power of the uplink signal sent by the terminal at the maximum transmit power to the base station.
  • the processing module is specifically configured to:
  • the interference strength information Determining, according to the interference strength information, that the interfering communication node in the vicinity of the base station does not have a strong interfering communication node whose interference strength is greater than a second preset threshold, and the interference strength exists in the interfering communication node around the terminal
  • the strong interference communication node that is greater than the second preset threshold determines that the power target value of the terminal is satisfied: the power target value is greater than the first preset threshold.
  • the processing module is specifically configured to:
  • the power target value is obtained by adjusting a reference power value when an uplink signal of the terminal reaches the base station.
  • the acquiring module is specifically configured to:
  • the interference strength information of the interference communication node that is reported by the terminal is obtained by the terminal after performing channel measurement on the unlicensed frequency band channel, according to the measurement result, or
  • the interference strength information reported by the terminal is obtained by the terminal detecting the interference communication node of the non-LTE system in the vicinity of the terminal, or the interference strength information reported by the terminal is detected by the terminal by the non-LTE system in the vicinity of the terminal. Determined after interfering with the type of communication node.
  • the device is disposed in a base station.
  • a base station is further provided in the embodiment of the present invention.
  • the base station mainly includes processing.
  • the device 901 is configured to receive and transmit data under the control of the processor 901.
  • the memory 902 stores a preset program, and the processor 901 is configured to read the memory 902.
  • the program according to the program, performs the following process:
  • the interfering communication node is a non-long-term evolution LTE node or a long-term evolution LTE-U node that is deployed by another carrier on an unlicensed frequency band.
  • the uplink transmit power meets:
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the base station is greater than the power of any one of the interfering communication nodes to reach the base station;
  • the power of the uplink signal sent by the terminal according to the uplink transmit power to the interference communication node and/or the base station is greater than a first preset threshold.
  • the processor 901 instructs the transceiver 903 to configure, by semi-static signaling or dynamic signaling, a reference power value of the uplink transmit power of the terminal in an unlicensed frequency band.
  • the processor 901 determines a power target value of the terminal according to the interference intensity information, and determines an uplink transmit power of the terminal according to the power target value, where the power target value represents the terminal The minimum power value when the uplink signal arrives at the base station, determining that the uplink transmit power of the terminal is: the power when the uplink signal sent by the terminal according to the uplink transmit power reaches the base station, not less than the power target value.
  • the processor 901 determines, according to the interference strength information, that the interference communication node in the vicinity of the base station has a strong interference communication node whose interference strength is greater than a second preset threshold, and determines a power target of the terminal. Value is satisfied:
  • the power target value is greater than the power of the interference signal of the strong interfering communication node to reach the base station;
  • the power of the uplink signal of the terminal when the uplink signal arrives at the base station is not less than the power target value, and the power of the uplink signal of the terminal reaches the power of the strong interference communication node is greater than a first preset threshold; or
  • the power target value is the power of the uplink signal sent by the terminal at the maximum transmit power to the base station.
  • the processor 901 determines, according to the interference strength information, that the interfering communication node in the vicinity of the base station does not have a strong interfering communication node whose interference strength is greater than a second preset threshold, and the periphery of the terminal The interfering communication node has a strong interfering communication node whose interference strength is greater than a second preset threshold, and determines that the power target value of the terminal satisfies: the power target value is greater than a first preset threshold.
  • the processor 901 determines, according to the interference strength information, that the neighboring interference communication node does not have a communication node whose interference strength is greater than a second preset threshold, determining that the power target value of the terminal is not lower than The third preset threshold.
  • the power target value is obtained by adjusting a reference power value when an uplink signal of the terminal reaches the base station.
  • the processor 901 performs channel measurement by using the transceiver 903 during an idle time period of the unlicensed band channel, and obtains interference intensity information of the interfering communication node around the base station according to the measurement result; and/or,
  • the processor 901 performs pre-call monitoring on the unlicensed band channel through the transceiver 903, and obtains interference intensity information of the interfering communication node around the base station according to the result of the pre-call monitoring; and/or,
  • the processor 901 detects, by the transceiver 903, an interfering communication node of the non-LTE system in the vicinity of the base station, and obtains interference strength information of the interfering communication node of the non-LTE system; and/or,
  • the processor 901 detects, by the transceiver 903, the type of the interference communication node of the non-LTE system surrounding the base station, and determines the interference strength information of the interference communication node; and/or,
  • the processor 901 detects, by the transceiver 903, the long-term evolution LTE-U node deployed by other carriers in the vicinity of the base station on the unlicensed frequency band, and obtains the interference strength information of the LTE-U node of the other carrier; and/or ,
  • the processor 901 receives, by the transceiver 903, the interference strength information of the interference communication node that is reported by the terminal, and the interference strength information reported by the terminal is subjected to channel measurement by the terminal to the unlicensed frequency band channel.
  • the measurement result is obtained, or the interference strength information reported by the terminal is obtained by the terminal detecting the interference communication node of the non-LTE system in the vicinity of the terminal, or the interference strength information reported by the terminal is detected by the terminal.
  • the type of interfering communication node of the non-LTE system around itself is determined.
  • the processor, the memory and the transceiver are connected by a bus, and the bus architecture may comprise any number of interconnected buses and bridges, specifically linked by one or more processors represented by the processor and various circuits of the memory represented by the memory .
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • Bus interface Provide an interface.
  • the transceiver can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor is responsible for managing the bus architecture and the usual processing, and the memory can store the data that the processor uses when performing operations.
  • the base station determines the uplink transmit power of the terminal according to the interference strength information of the interference communication node in the vicinity of the terminal and/or the terminal, so as to avoid the power of the interference communication node being large.
  • the base station cannot detect the terminal accessing the channel and causing the terminal to collide with the interfering communication node, the problem that the terminal's uplink transmit power is unrestricted and the power consumption is too large affects the battery life is avoided.
  • the uplink power control of the LTE system provides a solution.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de régulation de puissance en liaison montante dans une bande de fréquences sans licence et un dispositif correspondant, qui sont utilisés pour apporter une solution de régulation de puissance en liaison montante applicable à un système LTE dans une bande de fréquences sans licence. Le procédé comporte les étapes suivantes: une station de base acquiert des informations d'intensité de brouillage d'un nœud de communication brouilleur de celle-ci et/ou sur la périphérie d'un terminal; la station de base détermine, d'après les informations d'intensité de brouillage, une puissance d'émission en liaison montante du terminal; et la station de base configure le terminal pour émettre, à la puissance d'émission en liaison montante, un signal de liaison montante dans la bande de fréquences sans licence.
PCT/CN2017/071426 2016-02-04 2017-01-17 Procédé de régulation de puissance en liaison montante dans une bande de fréquences sans licence et dispositif correspondant WO2017133443A1 (fr)

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WO2020124499A1 (fr) * 2018-12-20 2020-06-25 北京小米移动软件有限公司 Procédé de transmission d'informations de liaison montante, appareil, station de base et terminal
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CN114666742B (zh) * 2020-12-22 2023-04-18 Oppo广东移动通信有限公司 蓝牙数据包的广播方法、装置、终端及存储介质
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WO2020124499A1 (fr) * 2018-12-20 2020-06-25 北京小米移动软件有限公司 Procédé de transmission d'informations de liaison montante, appareil, station de base et terminal
CN110868757A (zh) * 2019-11-21 2020-03-06 维沃移动通信有限公司 一种信息的传输方法、装置及电子设备
CN110868757B (zh) * 2019-11-21 2024-04-09 维沃移动通信有限公司 一种信息的传输方法、装置及电子设备
CN112398548A (zh) * 2020-11-17 2021-02-23 上海旷通科技有限公司 发射信号检测信息处理方法、装置、存储介质及通信终端
CN113038432A (zh) * 2021-02-26 2021-06-25 广东以诺通讯有限公司 一种基于5g d2d技术非授权频段的协商策略选择方法
CN117499989A (zh) * 2024-01-03 2024-02-02 青岛创新奇智科技集团股份有限公司 一种基于大模型的智能化生产管理方法及系统
CN117499989B (zh) * 2024-01-03 2024-03-22 青岛创新奇智科技集团股份有限公司 一种基于大模型的智能化生产管理方法及系统

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