WO2017088147A1 - Procédé et station de base pour réaliser une modulation et un codage adaptatifs - Google Patents

Procédé et station de base pour réaliser une modulation et un codage adaptatifs Download PDF

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Publication number
WO2017088147A1
WO2017088147A1 PCT/CN2015/095685 CN2015095685W WO2017088147A1 WO 2017088147 A1 WO2017088147 A1 WO 2017088147A1 CN 2015095685 W CN2015095685 W CN 2015095685W WO 2017088147 A1 WO2017088147 A1 WO 2017088147A1
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mcs
base station
bler
scheduling
determining
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PCT/CN2015/095685
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English (en)
Chinese (zh)
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严平
李英伦
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华为技术有限公司
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Priority to PCT/CN2015/095685 priority Critical patent/WO2017088147A1/fr
Publication of WO2017088147A1 publication Critical patent/WO2017088147A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a method and a base station for implementing adaptive modulation and coding.
  • the Adaptive Modulation and Coding (AMC) technology selects an appropriate modulation and coding scheme (MCS) according to the change of the radio channel, and the base station side according to the user's instantaneous channel quality indicator (Channel Quality Indicator, referred to as The CQI) and the current most suitable MCS are used to enable the user equipment (User Equipment, UE for short) to use the appropriate MCS to demodulate the data sent by the base station to the UE, and then send corresponding feedback information to the base station, and the feedback information may include affirmation.
  • the Acknowledgement (ACK) information or the Negative Acknowledgement (NACK) information the appropriate MCS selected by the base station, enables the UE to achieve the highest possible data throughput rate.
  • the base station side selects a high-order modulation and a high-rate channel coding mode, that is, the MCS takes a large value, thereby obtaining a higher data transmission rate. (Data transmission traffic is large); when the user is in an unfavorable communication location (such as at the cell edge or deep fading of the channel), the base station side selects a low-order modulation mode and a low-rate channel coding scheme, that is, the MCS takes a small value. Thereby ensuring the reliability of the communication link.
  • the method for implementing the AMC in the prior art still needs to measure or report the CQI of the UE periodically or aperiod, resulting in air interface resources. Waste.
  • the embodiments of the present invention provide a method and a base station for implementing adaptive modulation and coding, which are used to solve the problem that the UE needs to periodically or non-periodly measure and report CQI in the AMC, which causes waste of air interface resources.
  • an embodiment of the present invention provides a method for implementing adaptive modulation and coding AMC, including:
  • the base station indicates that the user equipment UE does not report the channel quality indicator CQI;
  • the base station Sending, by the base station, the data information that meets the first time window to the UE, where the data information includes a current first scheduling modulation and coding mode MCS of the base station;
  • the base station Determining, by the base station, the first block error rate BLER in the first time window corresponding to the first scheduling MCS according to the obtained feedback information corresponding to the data information, and according to the first BLER and the pre- The target BLER is determined, and the second scheduling MCS is determined.
  • the difference between the BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.
  • the base station indicates that the UE does not report the CQI
  • the base station may determine, by using feedback information of the UE, the first BLER in the first time window corresponding to the first scheduling MCS, and according to the first BLER and The preset target BLER determines the second scheduling MCS, so that the difference between the error block rate and the target BLER when the UE processes the data by using the second scheduling MCS is not greater than a preset threshold, so the method provided by the first aspect may
  • the actual scheduled MCS is determined by the feedback information sent by the UE, and the UE does not need to feed back the CQI, thereby reducing the power consumption of the UE and avoiding waste of air interface resources.
  • the determining, by the base station, the second scheduling MCS, according to the first BLER and the preset target BLER specifically includes:
  • the base station performs an update determining operation, and determines the second scheduling MCS.
  • the update determining operation includes:
  • the base station updates the current statistical MCS of the UE according to the preset adjustment policy, obtains an updated statistical MCS, and determines a new first scheduling MCS according to the updated statistical MCS;
  • the base station updates the current statistic MCS of the UE according to the preset adjustment policy, and obtains the updated statistic MCS, which specifically includes:
  • the determining, by the base station, the new first scheduling MCS according to the updated statistical MCS includes:
  • the base station performs a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, where the new first scheduling MCS satisfies the MCS range in the communication protocol.
  • the base station performs a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, specifically includes:
  • the base station rounds down the updated statistical MCS to obtain a third scheduling MCS, where the third scheduling MCS does not satisfy the MCS range in the communication protocol;
  • the base station Determining, by the base station, that the new first scheduling MCS is a minimum value in a maximum MCS of the third scheduling MCS and a communication protocol; or, the base station determining that the new first scheduling MCS is the third The maximum value in the minimum MCS in the MCS and communication protocol is scheduled.
  • the base station after determining the updated statistical MCS, performs a rounding operation on the statistical MCS to determine that the new first scheduling MCS is the third of the third scheduling MCS and the communication protocol. a minimum value in the MCS; or, determining that the new first scheduling MCS is the maximum of the third MCS and the minimum MCS in the communication protocol, that is, the base station performs a rounding operation to ensure that the base station can determine an accurate Scheduling the MCS, the determined scheduling MCS is within the MCS of the communication protocol, ensuring the reliability of data transmission between the base station and the UE; in addition, it does not require the UE to separately transmit the CQI, thereby reducing the power consumption of the UE and avoiding Waste of air interface resources.
  • the base station Before the UE sends the data information that satisfies the first time window, the method further includes:
  • the base station initializes statistical MCS information and scheduling MCS information maintained by the base station.
  • the base station determines a first error in the first time window corresponding to the first scheduling MCS
  • the block rate BLER includes:
  • the base station Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) And feedback information of the i-th data information sent by the UE.
  • the determining, by the base station, that the user equipment UE does not report the CQI includes:
  • the base station sends CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.
  • the base station initializes the statistical MCS information and the scheduled MCS information before transmitting the data information for the first time, thereby ensuring the reliability of the communication link.
  • an embodiment of the present invention provides a base station, including:
  • the indication module is configured to indicate that the user equipment UE does not report the channel quality indicator CQI;
  • a sending module configured to send, to the UE, a quantity of data that meets a first time window; where the data information includes a current first scheduling modulation and coding mode MCS of the base station;
  • a determining module configured to determine, according to the obtained feedback information corresponding to the data information, a first block error rate BLER in the first time window corresponding to the first scheduling MCS, and according to the first BLER And determining, by the preset target BLER, the second scheduling MCS, where the difference between the BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.
  • the determining module includes a first determining submodule
  • the first determining sub-module is configured to perform an update determining operation, and determine the second scheduling MCS, where the update determining operation includes:
  • the current statistical MCS of the UE is updated according to the preset adjustment policy, and the updated statistical MCS is obtained, and the new first scheduled MCS is determined according to the updated statistical MCS.
  • the first determining submodule includes a determining unit and a first determining unit
  • the first determining submodule further includes a second determining unit
  • the second determining unit is configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, where the new first scheduling MCS meets the MCS range in the communication protocol.
  • the second determining unit is specifically configured to round down the updated statistical MCS to obtain Third scheduling the MCS, and determining that the new first scheduling MCS is a minimum value of the third MCS and the maximum MCS in the communication protocol; or determining that the new first scheduling MCS is the third A maximum of the minimum MCS in the MCS and the communication protocol is scheduled, the third scheduled MCS not satisfying the MCS range in the communication protocol.
  • the base station further includes:
  • the initialization module is configured to initialize the statistical MCS information and the scheduled MCS information maintained by the base station before the sending module sends the data information that meets the first time window to the UE.
  • the determining module further includes a second determining submodule
  • the second determining submodule is configured according to a formula: Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) And feedback information of the i-th data information sent by the UE.
  • the indication module is specifically configured to send the CQI to the UE
  • the CQI configuration information is used to indicate that the UE does not report the CQI.
  • an embodiment of the present invention provides a base station, including:
  • a transmitter configured to indicate that the user equipment UE does not report the channel quality indication CQI, and send the data information that meets the first time window to the UE, where the data information includes the current first scheduling modulation and coding of the base station.
  • Mode MCS
  • a processor configured to determine, according to the obtained feedback information corresponding to the data information, a first block error rate BLER in the first time window corresponding to the first scheduling MCS, and according to the first BLER And determining, by the preset target BLER, the second scheduling MCS, where the difference between the BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.
  • the processor is configured to perform an update determining operation, and determine the second scheduling MCS, where the updating determining operation includes:
  • the current statistical MCS of the UE is updated according to the preset adjustment policy, and the updated statistical MCS is obtained, and the new first scheduled MCS is determined according to the updated statistical MCS.
  • the processor is configured to update a current statistic MCS of the UE according to a preset adjustment policy, Updated statistical MCS, including:
  • the processor is configured to determine, according to the updated statistical MCS, a new first scheduled MCS, Specifically include:
  • the processor is specifically configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, where the new first scheduling MCS meets the MCS range in the communication protocol.
  • the processor is configured to perform a rounding operation on the updated statistical MCS, and determine The new first scheduling MCS includes:
  • the processor is specifically configured to round down the updated statistical MCS to obtain a third scheduling MCS, and determine that the new first scheduling MCS is the third MCS and the largest MCS in the communication protocol. a minimum value; or determining that the new first scheduling MCS is a maximum value among the third MCS and a minimum MCS in a communication protocol, the third scheduling MCS not satisfying the MCS range in the communication protocol .
  • the processor is further And configured to initialize the statistical MCS information and the scheduled MCS information maintained by the base station before the transmitter sends the data information that meets the first time window to the UE.
  • the processor is configured to determine, in the first time window corresponding to the first scheduling MCS
  • the first block error rate BLER includes:
  • the processor is specifically configured according to a formula: Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) And feedback information of the i-th data information sent by the UE.
  • the transmitter is configured to indicate that the user equipment UE does not report the CQI Specifically, including:
  • the transmitter is specifically configured to send CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.
  • FIG. 1 is a schematic diagram of a network architecture of an LTE system according to an embodiment of the present disclosure
  • Embodiment 2 is a signaling flowchart of Embodiment 1 of a method for implementing AMC according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of Embodiment 2 of a method for implementing AMC according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of performing a rounding operation on a new first scheduling MCS according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of Embodiment 1 of a base station according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of Embodiment 2 of a base station according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of Embodiment 3 of a base station according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of Embodiment 4 of a base station according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of Embodiment 5 of a base station according to an embodiment of the present invention.
  • the method for implementing AMC in this application can be applied to a network architecture of a Long Term Evolution (LTE) system, and can also be applied to a network architecture of a next-generation (4.5G or 5G) communication system, and can also be applied to a network.
  • Non-wireless communication systems with ACK feedback and AMC schemes such as copper cables, fiber-optic communication systems, etc.
  • LTE system is used as an example, and the LTE system includes a user equipment, an Evolved Node B (eNodeB), and an Evolved Packet Core (EPC).
  • eNodeB Evolved Node B
  • EPC Evolved Packet Core
  • the EPC is responsible for the core network part
  • the signaling processing part is the Mobility Management Entity (MME)
  • the data processing part is the Serving Gateway (S-GW)
  • the eNode B is responsible for the access network part. It is called the evolved UMTS Terrestrial Radio Access Network (Evolved UTRAN, Evolved UTRAN).
  • the LTE system supports interoperability with other 3GPP systems. According to the duplex mode, the LTE system is divided into a Frequency Division Duplexing (LTE) system (Frequency Division Duplexing-LTE) and a Time Division Duplexing (LTE) system. Referred to as TDD-LTE).
  • LTE Frequency Division Duplexing
  • LTE Time Division Duplexing
  • the user equipment (User Equipment, UE for short) needs to report the CQI to the base station periodically or aperiodically, so that the base station can select a suitable MCS to schedule data transmission of the UE (the MCS is the scheduling MCS, ie, MCS Schedule ), the UE finally sends ACK information or NACK information to it; however, the AMC method of the prior art, for some static channel or slow channel communication scenario, undoubtedly causes the UE's power consumption and air interface resources. Waste.
  • the MCS is the scheduling MCS, ie, MCS Schedule
  • the method for implementing AMC provided by the embodiment of the present invention is to solve the problem that the UE is required in the prior art. Periodic or aperiodic measurement and reporting of CQI, resulting in a large technical problem of the UE's power consumption and the waste of air interface resources.
  • the base station involved in the embodiment of the present invention may refer to a device in the access network that communicates with the wireless terminal through one or more sectors on the air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, which is not limited in this application.
  • the UE involved in the embodiment of the present invention may be a wireless terminal.
  • the wireless terminal includes a device that provides voice and/or data services to the user.
  • the device can be a handheld device with wireless connectivity, or other processing device connected to the wireless modem.
  • the wireless terminal can also communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), for example, the wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" "Phone" and a computer having a mobile terminal, which may be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device that can interact with the core network for voice and/or data.
  • a radio access network eg, RAN, Radio Access Network
  • FIG. 2 is a signaling flowchart of Embodiment 1 of a method for implementing AMC according to an embodiment of the present invention.
  • the embodiment relates to a specific process in which the UE does not need to report the CQI to the base station, and the base station determines, by using the collected feedback information, the MCS of the data transmission of the final scheduling UE (ie, the second scheduling MCS in the following implementation).
  • the method includes:
  • the base station indicates that the user equipment UE does not report the CQI.
  • the base station may send, to the UE, an indication message that is used to indicate that the UE does not report the CQI
  • the indication message may be a CQI configuration message, and may also be a bit identifier carried in the downlink reference signal, and may also be other types of indication messages.
  • the method of the present invention does not limit how the base station indicates that the UE does not report the CQI.
  • the base station sends, to the UE, the data information that meets the first time window.
  • the data information includes a current first scheduling modulation and coding manner of the base station. MCS.
  • the first time window herein may be a time period, and the base station sends a certain amount of data information in the first time window, and the quantity of the data information may fill the entire first time window, that is, send the quantity of data.
  • the time occupied by the information is equal to the length of the first time window; optionally, the number of the data information may not be filled with the first time window, and the first time window is only used as a time range for counting feedback information of the UE.
  • the data information sent by the base station to the UE may include the current first scheduled MCS and the data packet of the base station, and after receiving the data information, the UE demodulates and decodes the data packet in the data information by using the first scheduling MCS. And so on, so that the feedback information of the data information can be sent to the base station.
  • the first scheduling MCS may be an MCS of any order specified by the communication protocol.
  • the UE sends the feedback information corresponding to the data information to the base station.
  • the feedback information sent by the UE to the base station is feedback information corresponding to all data information in the first time window.
  • the base station determines, according to the feedback information, a first block error rate (BLER) in the first time window corresponding to the first scheduling MCS, and according to the first BLER and the preset The target BLER determines the second scheduled MCS.
  • BLER block error rate
  • the base station performs statistics on the feedback information sent by the UE, that is, the base station collects the feedback information corresponding to the data information in the first time window, and determines the acknowledgement (ACK) information and the negative acknowledgement (NACK) information in the feedback information. And determining the first BLER in the first time window according to the quantity of the foregoing data information, where the first BLER corresponds to a block error rate of data processed by the UE by using the first scheduled MCS.
  • the base station After the base station obtains the first BLER, the base station adjusts the current first scheduling MCS according to the preset target BLER, and determines a suitable second scheduling MCS, where the second scheduling MCS can ensure that the UE adopts the first
  • the difference between the BLER and the target BLER that is demodulated and decoded by the second scheduling MCS is not greater than a preset threshold (or the BLER corresponding to the second scheduling MCS converges to the target BLER).
  • the target BLER may be 1%.
  • the second scheduling MCS may be the first scheduling MCS, that is, the first BLER obtained by the base station according to the feedback information sent by the UE after using the first scheduling MCS, and the difference between the target BLER and the target BLER is not greater than the foregoing
  • the threshold is set, and the base station can use the first scheduling MCS as the second scheduling MCS.
  • the base station determines that the first BLER is greater than the target BLER, and the difference between the two is greater than a preset threshold
  • the first scheduling MCS has a higher order, and the base station can appropriately reduce the order of the MCS, thereby obtaining a second MCS that can ensure that the difference between the error block rate and the target block error rate is not greater than a preset threshold;
  • the base station determines the first BLER If the difference between the two is greater than the preset threshold, the first scheduling MCS has a lower order, and the base station can appropriately increase the MCS order, thereby obtaining a block error rate and a target block rate.
  • the second MCS whose difference is not greater than a preset threshold.
  • the base station instructs the UE not to report the CQI, and the base station determines the first BLER in the first time window corresponding to the first scheduling MCS by using the feedback information of the UE, and further, according to the first BLER and the pre-
  • the target BLER is configured to determine the second scheduling MCS, so that the difference between the block error rate and the target BLER when the UE processes the data by using the second scheduling MCS is not greater than a preset threshold, so the method provided by the embodiment of the present invention may pass
  • the feedback information sent by the UE determines the MCS that is actually scheduled, and does not require the UE to feed back the CQI, thereby reducing the power consumption of the UE and avoiding waste of air interface resources.
  • FIG. 3 is a schematic flowchart of Embodiment 2 of a method for implementing AMC according to an embodiment of the present disclosure.
  • This embodiment relates to a specific process of determining, by the base station, the second scheduled MCS according to the first BLER and the target BLER.
  • the foregoing S104 specifically includes: the base station performs an update determining operation, and determines the second scheduling MCS.
  • the foregoing update judging operation is a process of continuously looping.
  • the flow diagram shown in FIG. 4 is taken as an example for description. Referring to FIG. 4, the update is performed.
  • the judgment operation specifically includes:
  • the base station determines whether a difference between the first BLER and the target BLER is greater than the preset threshold. If not, execute S204; if yes, execute S202.
  • the base station generally maintains a plurality of statistical MCSs (MCS Statistics ), and each of the statistical MCSs corresponds to one UE, that is, the base station internally maintains a statistical MCS corresponding to multiple UEs, and one statistical MCS (MCS Statistic ) corresponds to one scheduling MCS. (MCS Schedule ).
  • MCS Statistics statistical MCSs
  • MCS Statistic statistical MCS
  • MCS Schedule scheduling MCS.
  • the base station may initialize the internal MCS information and the scheduled MCS information, that is, after the initialization, the current MCS of the UE is MCS 0, and the first scheduled MCS is also MCS 0.
  • the base station may determine the first BLER according to the feedback information of the UE. Specifically, the base station may use the formula according to the formula. Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) The feedback information of the i-th data information sent by the UE, and when the UE can correctly parse the i-th data information, the value of ACK(i) is 1, when the UE cannot correctly parse the i-th data information. When ACK(i) has a value of 0.
  • the base station After the base station determines the first BLER, the base station determines whether the difference between the first BLER and the target BLER is greater than a preset threshold, and obtains a corresponding determination result.
  • the base station updates the current statistical MCS of the UE according to the preset adjustment policy, obtains an updated statistical MCS, and determines a new first scheduling MCS according to the updated statistical MCS.
  • the base station updates the current statistical MCS of the UE according to the preset adjustment policy, to obtain the updated statistical MCS. If this is the first judgment of the base station (that is, the update of the first statistical MCS is performed), that is, the current statistical MCS of the UE is MCS Statistic A, and the base station performs the current statistical MCS of the UE according to the adjustment policy (MCS Statistic).
  • MCS Statistic B Updated to MCS Statistic B
  • the base station performs a rounding operation on the updated statistical MCS to obtain a new first scheduling MCS (assumed to be MCS Schedule b).
  • the MCS Statistic B MCS Statistic A+ ⁇
  • MCS Statistic B MCS Statistic A- ⁇ .
  • the base station acquires, according to the new first scheduling MCS, the second BLER in the new first time window corresponding to the new first scheduling MCS, and returns the second BLER as the new first BLER, and returns to step S201. Until the difference between the new first BLER and the target BLER is not greater than the And ending the threshold, and determining the new first scheduling MCS as the second scheduling MCS.
  • the new first scheduling MCS (MCS Schedule b) is used to send a certain amount of data information to the UE again.
  • the base station may adopt the new first scheduling MCS (MCS schedule b) re-transmitting one or more data information to the UE, the UE transmits feedback information when the data information to the base station, the sliding window mechanisms can be employed, within a first time window corresponding to the The feedback information of the first data information or the feedback information of the first few data information is discarded.
  • the base station sends two pieces of data information to the UE again by using the new first scheduling MCS (MCS Schedule b), and the UE sends the data information to the base station.
  • the base station After feedback of two feedback information (P' and P respectively), the base station adopts a sliding window mechanism to discard the feedback information of the first two pieces of data information located in the first time window, and the above feedback information P' and P Adding to the first time window, the first time window may be referred to as a new first time window, and the base station may count the BLER in the new first time window, that is, counting the new first scheduling MCS (MCS Schedule) b) Corresponding second BLER
  • the base station may not adopt the sliding window mechanism, that is, the base station completely discards the feedback information in the first time window, and the time period in which the feedback information P′ and P′ are obtained is referred to as a new first time window. Then, the BLER in the new first time window is counted, and in fact, the second BLER corresponding
  • the base station After the second BLER is used as the new first BLER, the base station re-determines whether the difference between the new first BLER and the target BLER is greater than a preset threshold. If not, the base station determines the new scheduled MCS (MCS Schedule).
  • the base station updates the current statistical MCS of the UE again (the current statistical MCS of the UE is MCS Statistic B), and obtains the updated MCS (assumed to be MCS Statistic C), after which The base station performs a rounding operation on the updated statistical MCS (MCS Statistic C) again, and obtains a new first scheduling MCS (assumed to be MCS Schedule c) again, and according to the new first scheduling MCS (MCS Schedule) c) transmitting a certain amount of data information to the UE again, and counting the feedback information in the new first time window to obtain the second BLER corresponding to the new first scheduling MCS (MCS Schedule c), and again As the new first BLER, the second BLER continues to perform S201, and determines whether the difference between the new first BLER and the target BLER is greater than a preset threshold, until the difference between the new first BLER and the target BLER is not greater than a preset threshold.
  • the base station determines that the second scheduling MCS is the first scheduling MCS.
  • the base station uses the current first scheduling MCS as the second scheduling MCS.
  • the foregoing base station performs a rounding operation on the updated statistical MCS to obtain a new first scheduling MCS, where the new first scheduling MCS satisfies the MCS range in the communication protocol; however, when the base station updates the updated MCS After the rounding down, the obtained scheduling MCS exceeds the MCS range specified in the communication protocol, the scheduling MCS cannot be used as the new first scheduling MCS, and corresponding processing is needed to obtain a new first scheduling MCS.
  • the steps shown in Figure 5 including:
  • the base station rounds down the updated statistical MCS to obtain a third scheduling MCS, where the third scheduling MCS does not satisfy the MCS range in the communication protocol.
  • the base station determines that the new first scheduling MCS is a minimum value of the third MCS and the maximum MCS in the communication protocol. Alternatively, the base station determines that the new first scheduling MCS is the third. The maximum value in the minimum MCS in the MCS and communication protocol is scheduled.
  • the base station instructs the UE not to report the CQI, and the base station determines the first BLER in the first time window corresponding to the first scheduling MCS by using the feedback information of the UE, and further, according to the first BLER and the pre-
  • the target BLER is configured to determine the second scheduling MCS, so that the difference between the block error rate and the target BLER when the UE processes the data by using the second scheduling MCS is not greater than a preset threshold, so the method provided by the embodiment of the present invention may pass
  • the feedback information sent by the UE determines the MCS that is actually scheduled, and does not need the UE to feed back the CQI, thereby reducing the power consumption of the UE and avoiding waste of the air interface resources.
  • the base station compares the MCS information before sending the data information for the first time.
  • the MCS information is scheduled for initialization to ensure the reliability of the communication link.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
  • the following is an embodiment of the apparatus of the present invention that can be used to carry out the method embodiments of the present invention.
  • the modules involved in the following device embodiments may be implemented by software, may also be implemented by hardware, or may be implemented by a combination of software and hardware.
  • FIG. 6 is a schematic structural diagram of Embodiment 1 of a base station according to an embodiment of the present disclosure. As shown in Figure 6, The base station includes: an indication module 10, a sending module 11, a determining module 12, and a receiving module 13.
  • the indicating module 10 is configured to indicate that the user equipment UE does not report the channel quality indicator CQI;
  • the sending module 11 is configured to send, to the UE, a quantity of data information that satisfies a first time window, where the data information includes a current first scheduling modulation and coding mode MCS of the base station;
  • a determining module 12 configured to determine, according to the feedback information corresponding to the data information acquired by the receiving module 13, a first block error rate BLER in the first time window corresponding to the first scheduling MCS, and Determining, according to the first BLER and the preset target BLER, a second scheduling MCS, where a difference between a BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.
  • the foregoing indicator module 10 may be separately or separately set from the sending module 11 or may be integrated.
  • the indicating module 10 and the sending module 11 may be a transmitting and receiving antennas in the base station that cooperate with the radio frequency processing unit, and the determining module 12 may be a processor of the base station or a related hardware component in the processor.
  • the base station provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 7 is a schematic structural diagram of Embodiment 2 of a base station according to an embodiment of the present disclosure.
  • the above determining module 12 may include a first determining sub-module 121;
  • the first determining sub-module 121 is configured to perform an update determining operation, and determine the second scheduling MCS, where the update determining operation includes:
  • the current statistical MCS of the UE is updated according to the preset adjustment policy, and the updated statistical MCS is obtained, and the new first scheduled MCS is determined according to the updated statistical MCS.
  • the first determining sub-module 121 further includes a second determining unit 1213, configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS.
  • the new first scheduling MCS satisfies the MCS range in the communication protocol.
  • the second determining unit 1213 is specifically configured to round down the updated statistical MCS to obtain a third scheduling MCS, and determine that the new first scheduling MCS is the third scheduling MCS and a minimum value in the maximum MCS in the communication protocol; or determining that the new first scheduling MCS is the maximum value in the third MCS of the third scheduling MCS and the communication protocol, the third scheduling MCS not satisfying The MCS range in the communication protocol.
  • the base station provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the above base station may further include an initialization module 14;
  • the initialization module 4 is configured to initialize the statistical MCS information and the scheduled MCS information maintained by the base station before the sending module 11 sends the data information that satisfies the first time window to the UE.
  • the above determining module 12 may further include a second determining sub-module 122;
  • the second determining sub-module 122 is configured according to a formula: Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) And feedback information of the i-th data information sent by the UE.
  • the foregoing indication module 10 is specifically configured to send CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.
  • FIG. 9 the structural diagram of the base station shown in FIG. 9 is shown based on the structure of the embodiment shown in FIG. 8. Of course, it can be shown based on the structure of FIG. 7, which is just an example.
  • the base station provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the internal functional modules and structural diagrams of the base station are described above.
  • the following embodiments describe the physical structure of the base station.
  • FIG. 10 is a schematic structural diagram of Embodiment 5 of a base station according to an embodiment of the present invention.
  • the base station may include: the terminal includes a transmitter 20, a processor 21, and a receiver 22.
  • the transmitter 20 and the receiver 22 may be integrated in the transceiver of the base station, or may be an independent transceiver antenna on the base station.
  • the base station according to the embodiment of the present invention may further include a power source 23, a memory 24, a communication bus 25, and a communication port 26.
  • the communication bus 25 is used to implement a communication connection between components.
  • the memory 24 may include a high speed RAM memory and may also include a non-volatile memory NVM, such as at least one disk memory, in which various programs may be stored for performing various processing functions and implementing the method steps of the present embodiment.
  • the communication port 26 is used to implement connection communication between the base station and other peripheral devices.
  • the transmitter 20 is configured to indicate that the user equipment UE does not report the channel quality indication CQI, and send the data information that meets the first time window to the UE, where the data information includes the current first scheduling of the base station.
  • the processor 21 is configured to determine, according to the feedback information corresponding to the data information acquired by the receiver 22, the first block error rate BLER in the first time window corresponding to the first scheduling MCS, and according to the Determining, by the first BLER and the preset target BLER, the second scheduling MCS, where the difference between the BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.
  • the base station provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the processor 21 is specifically configured to perform an update determining operation, and determine the second scheduling MCS.
  • the update determining operation includes:
  • the current statistical MCS of the UE is updated according to the preset adjustment policy, and the updated statistical MCS is obtained, and the new first scheduled MCS is determined according to the updated statistical MCS.
  • the processor 21 is configured to: update the current statistic MCS of the UE according to the preset adjustment policy, and obtain the updated statistic MCS, specifically:
  • the processor 21 is specifically configured to determine a new first scheduling MCS according to the updated statistical MCS, and specifically includes: the processor 21, configured to perform a downward fetching on the updated statistical MCS. In the whole operation, a new first scheduling MCS is determined, and the new first scheduling MCS satisfies the MCS range in the communication protocol. Further, the processor 21 is specifically configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, which specifically includes:
  • the processor 21 is specifically configured to round down the updated statistical MCS to obtain a third scheduling MCS, and determine that the new first scheduling MCS is the largest of the third scheduling MCS and the communication protocol. a minimum value in the MCS; or determining that the new first scheduling MCS is the maximum of the third MCS and the minimum MCS in the communication protocol, the third scheduling MCS not satisfying the MCS in the communication protocol range.
  • the processor 21 is further configured to initialize the statistical MCS information and the scheduled MCS information maintained by the base station before the transmitter 20 sends the data information that meets the first time window to the UE.
  • the processor 21 is configured to determine a first block error rate BLER in the first time window corresponding to the first scheduling MCS, and specifically includes:
  • the processor 21 is specifically configured according to a formula: Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) And feedback information of the i-th data information sent by the UE.
  • the transmitter 20 is configured to indicate that the user equipment UE does not report the CQI, and specifically includes:
  • the transmitter 20 is configured to send CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.
  • the base station provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.

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

Abstract

La présente invention concerne un procédé et une station de base pour réaliser un AMC. Le procédé comprend les étapes suivantes : une station de base ordonne à un équipement utilisateur (UE) de ne pas transmettre un indicateur de qualité de canal (CQI), et envoie à l'UE des informations de données dont la quantité satisfait une première fenêtre de temps et qui contiennent un premier système de modulation et codage (MCS) de planification ; la station de base détermine, en fonction des informations de rétroaction correspondant aux informations de données, un premier taux d'erreur sur les blocs (BLER) dans la première fenêtre de temps à laquelle correspond le premier MCS de planification, et détermine, en fonction du premier BLER et d'un BLER cible, un second MCS de planification. La présente invention ne nécessite pas que l'UE renvoie le CQI, évitant ainsi le gaspillage de ressources d'interface radio.
PCT/CN2015/095685 2015-11-26 2015-11-26 Procédé et station de base pour réaliser une modulation et un codage adaptatifs WO2017088147A1 (fr)

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