WO2019241919A1 - 一种符号处理方法及相关设备 - Google Patents

一种符号处理方法及相关设备 Download PDF

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Publication number
WO2019241919A1
WO2019241919A1 PCT/CN2018/091917 CN2018091917W WO2019241919A1 WO 2019241919 A1 WO2019241919 A1 WO 2019241919A1 CN 2018091917 W CN2018091917 W CN 2018091917W WO 2019241919 A1 WO2019241919 A1 WO 2019241919A1
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WIPO (PCT)
Prior art keywords
symbol
subframe
target
target subframe
subframes
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PCT/CN2018/091917
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English (en)
French (fr)
Inventor
奥尔森马格纳斯
丁正虎
朱江
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112020025835-0A priority Critical patent/BR112020025835A2/pt
Priority to EP18923624.3A priority patent/EP3799484A4/en
Priority to CN201880093741.5A priority patent/CN112189362B/zh
Priority to PCT/CN2018/091917 priority patent/WO2019241919A1/zh
Publication of WO2019241919A1 publication Critical patent/WO2019241919A1/zh
Priority to US17/127,573 priority patent/US11800399B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0273—Traffic management, e.g. flow control or congestion control adapting protocols for flow control or congestion control to wireless environment, e.g. adapting transmission control protocol [TCP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • 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
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • 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 a symbol processing method and related equipment.
  • the power consumption of the base station is an important part of the power consumption of the entire mobile communication network.
  • the power consumption of the radio unit (RU) occupies the main part.
  • the power consumption of the power amplifier (PA) The proportion is very high in RU. Normally, the PA is always on. Even when no data is being sent, the PA will generate power.
  • the PA is turned off in the symbol period without actual content transmission, the power consumption of the entire RU can be effectively reduced.
  • PA shutdown is based on the transmission period of one symbol.
  • some symbol positions are pilot symbols (RS).
  • RS pilot symbols
  • PA cannot be turned off. If other symbols do not transmit other actual content, RU can Turn off the PA during this symbol period.
  • RS pilot symbols
  • these idle subframes can also be configured as Multimedia Broadcast Multicast Service (Single Frequency Network, MBSFN) subframes, where MBSFN subframes have symbols of different lengths. Since the MBSFN subframe contains fewer pilot symbols, more symbols can be turned off.
  • MBSFN Multimedia Broadcast Multicast Service
  • the RU can perform information interaction with the baseband processing unit (BBU) in advance, know the starting position and length of each symbol from the BBU, and then determine for itself which symbols have no data to send and Its off.
  • BBU baseband processing unit
  • the above method requires information interaction between the RU and the BBU, occupies more information resources, and the process is more complicated.
  • the technical problem to be solved in this application is to solve the problem of how to reduce the occupation of information resources to a certain extent and simplify the process of symbol shutdown.
  • the present application provides a symbol processing method that can be applied to a baseband processing unit.
  • the method may include: determining a target subframe that requires energy saving according to the current traffic of the cell, and formatting the target subframe. Modify the processing so that the symbol period of each symbol is the same, where the target subframe is a subframe in which the service is idle, that is, a subframe in which no service data is transmitted.
  • the radio frequency unit processes the power amplifier in units of symbols.
  • the baseband processing unit modifies the idle subframe format of the service, so that the length of each symbol is normalized, that is, the symbol period of each symbol is the same, thereby During the process of symbolic shutdown of the RF unit (turn off the PA during the symbol period of the symbol that needs to be switched off), the shutdown process can be performed according to the same symbol period, and no prior interaction between the RF unit and the base station processing unit is required , To a certain extent reduce the occupation of information resources, and simplify the process of symbol shutdown.
  • the baseband processing unit may further notify the terminal of the configuration information of the target subframe, so that the terminal avoids measuring the target subframe
  • the configuration information may include at least the number of target subframes and position information of the target subframes.
  • the baseband processing unit notifies the terminal of the configuration information of the target subframe, so that the terminal can avoid measuring the target subframe when performing a cell signal measurement. Can effectively avoid the above situation.
  • the target subframe may be an MBSFN subframe.
  • the baseband processing unit modifies the format of the target subframe, which may be to modify the symbols using the extended cyclic prefix in the target subframe to the symbol format of the regular cyclic prefix, so that the symbol period of each symbol and the symbol of the regular cyclic prefix The symbol periods are the same.
  • the total number of symbols of the target subframe is the same as the total number of symbols of the regular cyclic prefix subframe.
  • the radio frequency unit When the radio frequency unit performs symbol detection, if it detects that there is a second symbol transmitted by the service data, the PA is turned on according to the symbol period of the conventional CP. It can be seen that by implementing the foregoing feasible implementation mode, after the BBU modifies the target subframe, if the RU detects that the first symbol sent by the service data does not exist, the PA can also be turned off according to the symbol period of the conventional CP. , Reduce the transmission resource overhead between the BBU and RU, and simplify the process of symbol shutdown.
  • the baseband processing unit determines the target subframe that needs energy saving according to the current traffic of the cell, it can also determine whether the configuration function on the target subframe is on. If the configuration function is on, you can determine the target subframe that needs energy saving according to the current traffic of the cell.
  • the configuration function of the target subframe can be turned on by the user.
  • the user can use the base station-side configuration terminal to start the command.
  • the baseband processing unit receives the start command and can determine the configuration of the target subframe according to the start command.
  • the feature is turned on.
  • the baseband processing unit determines a target subframe that requires energy saving according to the current traffic volume of the cell.
  • the baseband processing unit may detect the current traffic volume of the cell according to a preset period, and determine the The energy-saving target subframe is required in the preset period.
  • the determined content includes at least the number of the target subframes and position information of the target subframes.
  • the baseband processing unit can periodically determine and adjust the target subframe according to the current traffic of the cell, so that the configured target subframe can better adapt to the current traffic. , Does not affect the normal transmission of business data.
  • the present application provides a symbol processing method that can be applied to a radio frequency unit.
  • the method may include: the radio frequency unit detects values of the first N sampling points of each symbol, and if the first N of the first symbol is detected The values of the sampling points are all 0, it can be determined that no service data is sent for the first symbol, and the radio frequency unit can turn off the power amplifier within the symbol period of the first symbol.
  • the symbol period of each symbol is the same.
  • the baseband processing unit modifies the format of the target subframe in which the service is idle, so that the symbol period of each symbol is the same.
  • the baseband processing unit modifies the idle subframe format of the service so that the length of each symbol is normalized, that is, the symbol period of each symbol is the same.
  • the switching off process can be performed according to the same symbol period, and no prior interaction between the radio frequency unit and the base station processing unit is required, which reduces the occupation of information resources to a certain extent and simplifies the symbol switching Process.
  • the radio frequency unit detects that the values of the first N sampling points of the second symbol are not all 0, it can be determined that the second symbol has service data sent, and arrives at the symbol period of the second symbol. Before the preset time point, the power amplifier is turned on.
  • a baseband processing unit has a function of implementing the behavior of the baseband processing unit in the first aspect or a possible implementation manner of the first aspect.
  • This function can be realized by hardware, and can also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the module may be software and / or hardware.
  • a radio frequency unit has a function of implementing the behavior of the radio frequency unit in the second aspect or a possible implementation manner of the second aspect.
  • This function can be realized by hardware, and can also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the module may be software and / or hardware.
  • a base station includes a radio frequency unit and a baseband processing unit.
  • the baseband processing unit can implement the solution in the method design of the first aspect, and an implementation manner and beneficial effects of the baseband processing unit to solve the problem.
  • the repetition will not be repeated;
  • the radio frequency unit can implement the solution in the method design of the second aspect, and the radio frequency unit solves the problem.
  • a base station including: a memory configured to store one or more programs; and a processor configured to call a program stored in the memory to implement the solution in the method design of the first aspect.
  • a base station including: a memory configured to store one or more programs; and a processor configured to call a program stored in the memory to implement the solution in the method design of the first aspect.
  • a computer-readable storage medium stores a computer program, where the computer program includes program instructions, and the program instructions, when executed by a processor, cause the processor to execute the first section.
  • FIG. 1 is a schematic structural diagram of a base station according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of an LTE radio frame according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an MBSFN subframe according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a scenario where multiple carriers share one PA according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a scenario where a single carrier uses one PA according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another scenario where multiple carriers share a PA according to an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a symbol processing process according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a target subframe according to an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a symbol processing method according to an embodiment of the present application.
  • FIG. 10 is a schematic flowchart of another symbol processing method according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a baseband processing unit according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a radio frequency unit according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of another base station according to an embodiment of the present application.
  • the structure of a base station involved in the present application is described below first. It should be noted that the base station can be applied to mobile communication systems that are not limited to Long Term Evolution (LTE), 5th generation mobile communication (5G) systems, new air interface (NR) systems, Machine-to-Machine (M2M) systems, etc.
  • LTE Long Term Evolution
  • 5G 5th generation mobile communication
  • NR new air interface
  • M2M Machine-to-Machine
  • the base station 101 may be a base transceiver station (BTS) in a Time Division Division Synchronous Code Division Multiple Access (TD-SCDMA) system, or an evolutionary base station (Evolutional base station in an LTE system).
  • BTS base transceiver station
  • TD-SCDMA Time Division Division Synchronous Code Division Multiple Access
  • Evolutional base station in an LTE system
  • NodeB, eNodeB and base stations in 5G systems and New Air Interface (NR) systems.
  • the base station may also be an access point (Access Point, AP), a transmission node (Trans TRP), a central unit (CU), or other network entities, and may include some or all of the functions of the above network entities .
  • AP access point
  • Trans TRP transmission node
  • CU central unit
  • the base station 101 may be composed of two basic functional modules: a baseband processing unit (Baseband Unit, BBU) and a radio frequency unit (Radio Unit, RU).
  • BBU baseband processing unit
  • Radio Unit Radio Unit
  • the BBU can complete the baseband processing functions (encoding, multiplexing, modulation, and spreading, etc.) of the Uu interface, signaling processing, local and remote operation and maintenance functions, as well as the working status monitoring and alarm information reporting functions of the base station.
  • the RU may include at least one power amplifier (PA).
  • PA power amplifier
  • the power consumption of the base station is an important part of the power consumption of the entire mobile network.
  • the power consumption of the RU occupies the main part, and the power consumption ratio of the PA is very high in the RU.
  • the PA is always on. Even when there is no data transmission, the PA will generate power.
  • the PA is turned off in the symbol period without actual content transmission, the power consumption of the RU can be effectively reduced.
  • FIG. 2 is a schematic structural diagram of an LTE radio frame according to an embodiment of the present application. It can be seen from FIG. 2 that a radio frame is 10 ms in length and can include 10 subframes, and each subframe includes 2 slots, each slot is 0.5 ms.
  • a radio frame is 10 ms in length and can include 10 subframes, and each subframe includes 2 slots, each slot is 0.5 ms.
  • CP Cyclic Prefix
  • one subframe can contain 14 symbols; for an extended CP, one subframe can contain 12 symbols.
  • each sub-frame there are some fixed symbol positions with pilot symbols.
  • the pilot symbols have some special data and must be transmitted. Therefore, during the symbol period of the pilot symbol, the PA cannot be turned off. If the other symbols other than the pilot symbol do not transmit actual service data, the RU can turn off the PA within the symbol period.
  • the load of the cell is lower (that is, the traffic volume of the cell is lower), there will be more idle symbols of this type that do not transmit actual content, and the symbol is turned off (that is, the PA is turned off during the symbol period of the symbol) The more triggers there are.
  • the service data can be concentrated in a few subframes for scheduling, and other subframes are vacated to become idle subframes. Further, these idle subframes may be configured into a format of a Multimedia Broadcast Multicast Single Frequency Network (Multimedia Broadcast Service Single Frequency Network MBSFN) subframe. Since MBSFN subframes contain fewer pilot symbols, configuring idle subframes as MBSFN subframes can increase the chances of symbols being turned off.
  • MBSFN Multimedia Broadcast Multicast Single Frequency Network
  • Non-MBSFN region is a non-MBSFN region
  • MBSFN region MBSFN region
  • Non-MBSFN Region can be configured with 1 or 2 symbols. Except Non-MBSFN regions, the remaining symbols are MBSFN regions.
  • the CP length of each symbol of the Non-MBSFN Region is the same as the CP length of the radio frame sub-frame 0 (generally a normal CP), and the MBSFN Region symbol can use extended CP. To ensure timing alignment, a part of the blank area is filled with zeros after the symbol of the last regular CP of the Non-MBSFN region. It should be noted that, in FIG. 3, Non-MBSFN Region contains two symbols of conventional CP as an example.
  • carrier 1 uses the conventional CP subframe format
  • carrier 2 is configured with MBSFN subframes.
  • the two types of subframes can only ensure the end-to-end alignment of the subframes.
  • some MBSFN subframes use The length of the subframe format of the extended CP is different from that of the conventional CP. Therefore, the boundary of the symbol in the MBSFN region in carrier 1 and the boundary of the conventional CP of carrier 2 (such as the boundary of symbol 5 and carrier of carrier 1) The boundary of the symbol 4 of 2) is misaligned.
  • this application also proposes a symbol processing method and related equipment, which can reduce the occupation of information resources to a certain extent and simplify the process of symbol shutdown.
  • a symbol processing method and related equipment which can reduce the occupation of information resources to a certain extent and simplify the process of symbol shutdown.
  • multi-carriers share the same PA
  • conventional CP subframes and MBSFN subframes coexist, and RUs with different symbol lengths cannot accurately divide symbol boundaries when performing symbol shutdown, and cannot effectively perform symbol shutdown. .
  • the symbol processing method shown in this application can be applied to the following two scenarios.
  • a single carrier is configured on a single PA.
  • the radio frame may include a regular CP subframe and an MBSFN subframe.
  • the problem of misaligned symbols between different carriers is not involved.
  • Scenario 2 Multiple carriers are configured on a single PA. For example, as shown in FIG. 6, two carriers are configured on a PA, namely carrier 1 and carrier 2.
  • the subframes on carrier 1 are all regular CP subframes, and the subframes on carrier 2 include regular CP subframes. Frame and MBSFN subframe format.
  • the radio frames in the above two scenarios may be configured with a maximum of 6 MBSFN subframes. It should be understood that the above two types of scenarios are merely examples, not exhaustive, and should not be used as a limitation on this application.
  • the BBU may determine the number of configuration of the target subframe and the specific position according to the current traffic of the cell, and configure the target subframe.
  • the BBU may determine the number of target subframes that can be configured and the specific position of the target subframe according to the current traffic of the cell (refer to the downlink physical resource block (PRB) utilization of the cell). And it can be restricted that services can only be scheduled in other subframes that are not configured as the target subframe format.
  • PRB physical resource block
  • the target subframe may be an MBSFN subframe.
  • the BBU can modify the format of the determined MBSFN subframe, and change the symbols of the extended CP in the MBSFN region to the symbols of the regular CP.
  • the total number of symbols in the entire subframe can be maintained at 14. Since no valid data is transmitted in such MBSFN subframes, modifying the subframe format does not affect the demodulation of the end user. For example, referring to FIG. 8, the length of all symbols in the target subframe is the same, and the length of each symbol can be the same as the length of the symbols of the conventional CP subframe.
  • the BBU may notify the terminal of the configuration information of the target subframes through a system message.
  • the position of the pilot symbol is an example of a dual antenna port scenario. It should be understood that, in other scenarios, the position of the pilot symbol may be another position.
  • the RU can make a decision to turn off the symbol and control the on state of the PA.
  • the RU determines whether the values of the first N sampling points of each symbol of the subframe are all zero to determine whether the symbol has service data sent. When it is determined that there is a first symbol transmitted without service data, the PA is turned off in the symbol period of the first symbol to save RU power consumption.
  • the BBU modifies the format of the target subframe on a single carrier so that the length of each symbol is the same as the symbol length of the conventional CP Even if the symbol period of each symbol is the same as that of the conventional CP, then the RU can determine the value of the first N sampling points of each symbol. When it is determined that there is a first symbol without traffic data transmission on the carrier , Turn off the PA during the symbol period of the first symbol to save RU power consumption.
  • the BBU may first modify the format of the target subframes on the multiple carriers so that the length of each symbol and the The symbol length of the conventional CP is the same, even if the symbol period of each symbol is the same as the symbol period of the conventional CP, then the RU can determine the values of the first N sampling points of the multiple carrier-aligned symbols at the same time.
  • the PA is turned off in the symbol period of the first symbol to save RU power consumption.
  • the length of each symbol is unified so that the symbol period of each symbol is the same, so the BBU is no longer required to send the subframe format to the RU, and the RU can use the symbol of the regular CP Length for symbol off operation. Since the BBU and RU no longer perform information interaction, it can reduce the occupation of information resources to a certain extent, and also simplify the process of symbol shutdown.
  • FIG. 9 is a schematic flowchart of a symbol processing method provided by the present application.
  • the method shown in FIG. 9 may include:
  • the BBU determines a target subframe that requires energy saving according to the current traffic of the cell.
  • the target subframe is a subframe in which the service is idle.
  • the BBU can determine the number of target subframes that need to save energy and the location information of the target subframe.
  • the current traffic volume of the cell can be measured according to the downlink PRB utilization rate of the cell. For example, if the downlink PRB utilization rate is 10%, the BBU can determine that there are 5 target subframes that need to save energy; if the downlink PRB utilization rate is 10% -30%, the BBU can determine that the target subframes that need to save energy are 4; if the downlink PRB utilization rate is 30% -50%, the BBU can determine that there are 2 target subframes that need to save energy.
  • the foregoing manners are merely examples, not exhaustive, and include but are not limited to the foregoing optional manners.
  • the BBU may determine that the format of the target subframe is the format of the MBSFN subframe. Since MBSFN subframes contain fewer pilot symbols, configuring idle subframes as MBSFN subframes can increase the chances of symbols being turned off. For example, the format of the MBSFN subframe can be shown in FIG. 3.
  • the BBU may determine whether the configuration function on the target subframe is turned on before determining the target subframe that needs energy saving according to the current traffic of the cell; if the configuration function on the target subframe is turned on, Then, according to the current traffic of the cell, determining a target subframe that requires energy saving.
  • the user can send a start instruction to the BBU through the configuration end of the base station.
  • the start instruction can be used to start the configuration function of the target subframe.
  • the BBU receives the start instruction, it can determine the configuration of the target subframe. The function is on.
  • the processes shown in 901 and 902 may not be performed.
  • the BBU determines that the configuration function on the target subframe is turned off, it may also not modify the format of the target subframe after determining the target subframe, that is, according to the original MBSFN subframe. There are formats for corresponding configuration of the target subframe. Further, the BBU can control the RU to turn off the PA, or the BBU communicates with the PA in advance to inform the RU of the configured symbol position and symbol length and other information. When the RU detects that there is no first When signing, the symbol period of the first symbol is determined according to the information notified in advance by the BBU, and the PA is turned off within the symbol period of the first symbol.
  • the BBU modifies the format of the target subframe so that the symbol period of each symbol is the same.
  • the target subframe is an MBSFN subframe.
  • Modifying the format of the target subframe may include: modifying the symbol using the extended CP in the target subframe to the symbol format of the conventional CP, so that The symbol period of each symbol in the target subframe is the same as the symbol period of the symbol of the conventional CP; wherein the total number of symbols of the target subframe is the same as the total number of symbols of the conventional CP subframe.
  • a carrier configured with an MBSFN subframe may include two types of subframes: an MBSFN subframe and a conventional CP subframe.
  • the MBSFN subframe may include two types of symbols: symbols of the extended CP and symbols of the conventional CP, and the symbol length of the extended CP is different from that of the conventional CP.
  • the symbols of the regular CP may be included in the regular CP subframe.
  • the BBU modifies the symbols of the extended CP in the MBSFN subframe to the symbol format of the conventional CP, so that the symbol length of each symbol is the same as the symbol length of the conventional CP subframe, that is, the symbol period of each symbol is the same as that of the conventional CP. the same.
  • the RU when the RU performs symbol detection, if it detects the presence of the second symbol sent by the service data, the PA is turned on according to the symbol period of the conventional CP. After the BBU changes the format of the target subframe, if the RU detects When the first symbol sent by the service data does not exist, the PA may also be turned off according to the symbol period of the conventional CP. When the symbol length of each symbol is unified, the BBU no longer needs to inform the RU of information such as the format and position of the subframe, thereby reducing the transmission resource overhead between the BBU and the RU, and simplifying the symbol shutdown process.
  • the BBU makes the total number of symbols of the MBSFN subframe equal to the total number of symbols of the conventional CP subframe.
  • the boundaries of the symbols can be aligned. For example, as shown in FIG. 8, the symbols of the conventional CP subframe are aligned. It can align with the boundary of the symbol of the modified target subframe.
  • the RU detects that there is a first symbol in the same position on different carriers that no service data is sent, the PA can be turned off according to the symbol period of the conventional CP. .
  • the method further includes: notifying the terminal of the configuration information of the target subframe, so that the terminal avoids measuring the target subframe; wherein the configuration information is at least It includes the number of the target subframes and the position information of the target subframes.
  • the number and location information of the modified target subframe can be notified to the terminal through a system message.
  • the terminal performs a cell signal measurement
  • the target subframe can be avoided from being measured.
  • the RS symbol may not be detected at the preset position of the target subframe, and the cell signal may be misjudged, resulting in a loss. Words, signal instability, etc. Therefore, informing the terminal through a system message in advance can effectively avoid the above situation.
  • the interaction process between the BBU and the terminal may refer to the notification process after the MBSFN subframe configuration is changed, which is not described in detail here.
  • determining the target subframe that requires energy saving according to the current traffic volume of the cell may include: detecting the current traffic volume of the cell according to a preset period; and determining within the preset period based on the detected current sales volume.
  • the energy-efficient target subframe is required, and the determined content includes at least the number of the target subframes and the position information of the target subframe.
  • the configuration of the target subframe by the BBU can be periodically determined and adjusted according to the traffic situation of the cell. The lower the load, the greater the number of target subframes that can be configured.
  • the preset period may be 100s.
  • the BBU measures the current traffic volume of the cell every 100s, and determines the number and location of target subframes that need to save energy in the current cycle based on the measured current traffic volume. After the end of this cycle, the BBU can re-measure the current traffic volume of the cell, and determine and adjust the number and location of target subframes.
  • the BBU can notify the terminal of the configuration information of the target subframe through a system message.
  • the BBU determines the target subframe that needs energy saving according to the current traffic of the cell, and modifies the format of the target subframe to make the symbol periods of the symbols in the carrier the same. Each symbol can be detected. When the first symbol sent without service data is detected, the PA can be turned off according to the same symbol period. The information interaction between the BBU and the RU is no longer required to inform the RU that the symbol is turned off. Content, such as the cycle and location, thereby reducing the information resource overhead between the BBU and RU, and simplifying the implementation process of symbol shutdown.
  • FIG. 10 is a schematic flowchart of another symbol processing method according to an embodiment of the present application.
  • the method shown in FIG. 10 may include:
  • the RU detects the values of the first N sampling points of each symbol, where N is a positive integer greater than 0.
  • the N value may be determined according to the bandwidth of the cell. For example, if the cell bandwidth is 20MHz, the RU can detect the first 32 sampling points of each symbol; if the cell bandwidth is 10M Hz, the RU can detect the first 16 sampling points of each symbol; if the cell bandwidth is 5M Hz, the RU Then the first 8 sample points of each symbol can be detected.
  • the length of a sampling point can be determined according to the sampling frequency.
  • the sampling frequency can be 30.72MHz, and the length of one sampling point can be 1 / 30.72ms; when the cell bandwidth is 10MHz, the sampling frequency can be 15.36MHz, and the length of one sampling point can be It is 1 / 15.36ms.
  • the foregoing manners are merely examples, not exhaustive, including but not limited to the foregoing optional manners.
  • the RU detects that the values of the first N sampling points of the first symbol are all 0, it determines that the first symbol has no service data to send.
  • the RU if the RU detects that the values of the first N sampling points of the first symbol are all 0, it can be considered that the first symbol has no service data to send, and the first symbol is a symbol of idle traffic.
  • the RU performs a shutdown process on the power amplifier within a symbol period of the first symbol.
  • the symbol period of each symbol is the same.
  • the BBU modifies the format of the target subframe so that the symbol period of each symbol is the same, and the target subframe is a subframe in which the service is idle.
  • the BBU can determine the target subframe that needs energy saving according to the current traffic of the cell, and modify the format of the target subframe to make the symbol periods of the symbols in the carrier the same.
  • the symbol period may be the same as the symbol period of a regular CP subframe.
  • the RU may turn off the power amplifier according to the symbol period of the conventional CP subframe.
  • the RU turns off the power amplifier, if it is detected that the values of the first N sampling points of the second symbol are not all 0, it is determined that the second symbol has service data to send; in the second symbol The power amplifier is turned on at a preset time point before the symbol period arrives.
  • the preset time point may be measured in microseconds. After the RU has turned off the PA in the symbol period of the first symbol, RU continues to measure the subsequent symbols. If the values of the first N sampling points of the second symbol are not all 0, it can be in the symbol period of the second symbol. For the first m microseconds, the power amplifier is turned on in advance so as not to affect the normal transmission of business data.
  • the RU detects the values of the first N sampling points of each symbol. If it is detected that the values of the first N sampling points of the first symbol are all 0, it can be determined that the first symbol has no service. Data is sent, and the PA is turned off during the symbol period of the first symbol.
  • the BBU no longer needs to inform the RU of the configuration information of the subframe, and the RU can turn off the PA according to a fixed symbol period.
  • the information resource overhead between the BBU and the RU is reduced, and the implementation process of symbol shutdown is simplified.
  • FIG. 11 is a schematic structural diagram of a baseband processing unit according to an embodiment of the present application.
  • the baseband processing unit shown in FIG. 11 may include:
  • a determining module 1101 is configured to determine a target subframe that requires energy saving according to a current traffic volume of a cell.
  • the target subframe is a subframe in which the service is idle.
  • the processing module 1102 is configured to modify a format of the target subframe so that a symbol period of each symbol is the same.
  • the baseband processing unit further includes a notification module 1103, configured to notify the terminal of the configuration information of the target subframe, so that the terminal avoids measuring the target subframe.
  • the configuration information includes at least the number of the target subframes and the position information of the target subframes.
  • the target subframe is a multimedia broadcast multicast single frequency network MBSFN subframe.
  • the processing module 1102 is specifically configured to modify the symbols in the target subframe using the extended cyclic prefix to the symbol format of the conventional cyclic prefix, so that the symbol period of each symbol is the same as that of the symbol of the conventional cyclic prefix;
  • the total number of symbols of the target subframe is the same as the total number of symbols of the regular cyclic prefix subframe.
  • the baseband processing unit further includes: a determination module 1104, configured to determine whether the configuration function on the target subframe is on; if the configuration function on the target subframe is on, the determination module passes Step 1101: Determine a target subframe that requires energy saving according to the current traffic of the cell.
  • the determining module 1101 is specifically configured to detect a current traffic volume of a cell according to a preset period, and determine a target subframe that needs to save energy within the preset period according to the detected current sales volume, where the determining The content includes at least the number of the target subframes and the position information of the target subframes.
  • FIG. 12 is a schematic structural diagram of a radio frequency unit according to an embodiment of the present application.
  • the radio frequency unit shown in FIG. 12 may include:
  • the detection module 1201 is configured to detect values of the first N sampling points of each symbol, where N is a positive integer greater than 0.
  • the determining module 1202 is configured to determine that if the values of the first N sampling points of the first symbol are all 0, it is determined that no service data is sent in the first symbol.
  • the processing module 1203 is configured to perform a shutdown process on the power amplifier within a symbol period of the first symbol, where a symbol period of each symbol is the same.
  • the baseband processing unit modifies the format of the target subframe so that the symbol period of each symbol is the same, and the target subframe is a subframe in which the service is idle.
  • the determining module 1202 is further configured to determine that if the values of the first N sampling points of the second symbol are not all 0, it is determined that the second symbol has service data sent.
  • the processing module 1203 is further configured to turn on the power amplifier at a preset time point before a symbol period of the second symbol arrives.
  • FIG. 13 is a schematic structural diagram of another base station according to an embodiment of the present application.
  • the base station as shown in FIG. 13 may include:
  • FIG. 13 uses the bus connection as an example. among them:
  • the communication interface 1303 may be used for a network device to communicate with other communication devices, such as a terminal device or other network devices.
  • the terminal device may be the terminal device shown in FIG. 9.
  • the communication interface 1303 and the communication interface 903 may be a Long Term Evolution (LTE) (4G) communication interface, or a communication interface of 5G or a new air interface in the future.
  • LTE Long Term Evolution
  • the network device may also be configured with a wired communication interface 1303 to support wired communication.
  • a backhaul link between a network device and other network devices may be a wired communication connection.
  • the transmitter 1305 may be configured to perform transmission processing on a signal output by the processor 1301, for example, signal modulation.
  • the receiver 1306 may be configured to perform receiving processing on a mobile communication signal received by the antenna 1308. For example, signal demodulation.
  • the transmitter 1305 and the receiver 1306 may be considered as a wireless modem.
  • the number of the transmitters 1305 and the receivers 1306 may be one or more.
  • the antenna 1308 may be used to convert electromagnetic energy in a transmission line into electromagnetic waves in a free space, or convert electromagnetic waves in a free space into electromagnetic energy in a transmission line.
  • the coupler 1307 can be used to divide the mobile communication signal into multiple channels and distribute the signals to multiple receivers 1306.
  • the memory 1302 is coupled to the processor 1301 and is configured to store various software programs and / or multiple sets of instructions.
  • the memory 1302 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices.
  • the memory 1302 may store an operating system (hereinafter referred to as a system), such as an embedded operating system such as uCOS, VxWorks, and RTLinux.
  • the memory 1302 may also store a network communication program, which may be used to communicate with one or more additional devices, one or more terminal devices, and one or more network devices.
  • the processor 1301 may be used to perform wireless channel management, implement call and communication link establishment and removal, and provide cell switching control for users in the control area.
  • the processor 1301 may include: an Administration Module / Communication Module (AM / CM) (a center for voice channel exchange and information exchange), a Basic Module (BM) (for completing a call Processing, signaling processing, wireless resource management, wireless link management and circuit maintenance functions), code conversion and sub-multiplexing unit (Transcoder and SubMultiplexer (TCSM) (for complete multiplexing demultiplexing and code conversion functions) Wait.
  • AM / CM Administration Module / Communication Module
  • BM Basic Module
  • TCSM Transcoder and SubMultiplexer
  • the processor 1301 may be configured to read and execute computer-readable instructions. In one embodiment, the processor 1301 may call a program in the memory 1302 to perform the following steps:
  • the power amplifier is turned off during the symbol period of the first symbol, where the symbol period of each symbol is the same.
  • the processor 1301 may be used to call a program stored in the memory 1302, for example, a program for implementing a power adjustment method provided by one or more embodiments of the present application on a network device side, and execute instructions included in the program I will not repeat them here.
  • the network device may be the base station 101 shown in FIG. 1 and may be implemented as a base transceiver station, a wireless transceiver, a basic service set (BSS), an extended service set (ESS), NodeB, eNodeB, and access point. Or TRP and so on.
  • BSS basic service set
  • ESS extended service set
  • NodeB NodeB
  • eNodeB Access point
  • TRP TRP and so on.
  • the network device shown in FIG. 13 is only an implementation manner of the embodiment of the present application. In actual applications, the network device may further include more or fewer components, which is not limited herein.
  • a computer-readable storage medium stores a program.
  • the program is executed by a processor, the method shown in the terminal device in the present application may be implemented, or Network device as shown.
  • the computer-readable storage medium may be an internal storage unit of the terminal according to any of the foregoing embodiments, such as a hard disk or a memory of the terminal.
  • the computer-readable storage medium may also be an external storage device of the computer, such as a plug-in hard disk, a smart memory card (SMC), and a secure digital (SD) card provided on the computer. , Flash card (Flash card) and so on.
  • the computer-readable storage medium may further include both an internal storage unit of the terminal and an external storage device.
  • the computer-readable storage medium is used to store the program and other programs and data required by the terminal.
  • the computer-readable storage medium may also be used to temporarily store data that has been or will be output.
  • the principle of the computer to solve the problem provided in the embodiment of the present invention is similar to that of the method embodiment of the present invention, so the implementation of the computer can refer to the method implementation. For brevity description, it will not be repeated here.
  • the above program can be stored in a computer-readable storage medium, and the program is being executed. In this case, the processes of the embodiments of the methods described above may be included.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM).

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Abstract

一种符号处理方法，其中，基带处理单元将业务空闲的子帧格式进行修改，使得每个符号的长度实现了归一化，也即，使每个符号的符号周期都相同，从而在射频单元进行符号关断的处理过程中，可以按照相同的符号周期进行关断处理，不需要射频单元和基站处理单元进行事先交互，在一定程度上减少占用信息资源，并简化了符号关断的流程。

Description

一种符号处理方法及相关设备 技术领域
本发明涉及通信技术领域，尤其涉及一种符号处理方法及相关设备。
背景技术
基站的功耗是整个移动通信网络功耗的重要组成部分，而在基站中，射频单元(Radio Unit，RU)的功耗占据了主要部分，其中，功率放大器(Power Amplifier，PA)的功耗占比在RU中又很高。通常情况下，PA一直处于开启状态，即使没有数据发送的时候，PA也会产生功耗。对于基站而言，如果在无实际内容发送的符号周期内将PA关断，则可有效降低整个RU的功耗。
PA关断是以一个符号的传输周期为单位，在每个子帧中，有些符号位置为导频符号(Reference Signal，RS)，不能关断PA，其他符号如果没有传输其他实际内容，则RU可以在该符号周期内将PA关断。为了增加符号关断机会，在负载较低时，可以将业务集中在某些子帧进行调度，而将其他子帧空出来，成为空闲的子帧。同时，还可以在集中调度后将这些空闲子帧配置成多媒体广播多播单频网(Multimedia Broadcast Multicast Service Single Frequency Network，MBSFN)子帧，其中，MBSFN子帧存在不同长度的符号。由于MBSFN子帧含有的导频符号更少，因此可以关断的符号会更多。
对于符号关断的具体实现，可以是RU事先和基带处理单元(Baseband Unit，BBU)进行信息交互，从BBU处知道每个符号的起始位置和长度，然后自身判定哪些符号没有数据发送并将其关断。然而，上述方法需要RU和BBU之间进行信息交互，占用了较多的信息资源，同时过程也较为繁琐。
发明内容
本申请所要解决的技术问题在于，解决如何在一定程度上减少占用信息资源，并简化符号关断的流程的问题。
第一方面，本申请提供了一种符号处理方法，可应用于基带处理单元，该方法可包括：根据小区的当前业务量，确定需要节能的目标子帧，并将该目标子帧的格式进行修改处理，以使各个符号的符号周期相同，其中，该目标子帧为业务空闲的子帧，也即，不传输业务数据的子帧。
由于一个无线帧可包括多个子帧，一个子帧内可包括多个符号，射频单元在将功率放大器进行关断处理时，是以符号为单位进行处理。通过实施上述第一方面所示的方法，基带处理单元将业务空闲的子帧格式进行修改，使得每个符号的长度实现了归一化，也即，使每个符号的符号周期都相同，从而在射频单元进行符号关断(在需要关断的符号的符号周期内将PA关断)的处理过程中，可以按照相同的符号周期进行关断处理，不需要射频单元和基站处理单元进行事先交互，在一定程度上减少占用信息资源，并简化了符号关断的流程。
作为一种可行的实施方式，该基带处理单元将该目标子帧的格式进行修改处理之后， 还可以将该目标子帧的配置信息通知给终端，以使该终端避开测量该目标子帧，其中，该配置信息至少可以包括目标子帧的数量以及目标子帧的位置信息。
由于目标子帧的格式进行了修改，如果终端对目标子帧进行了测量，在目标子帧的预设位置可能不会测到RS符号，则可能会误判小区信号较差，从而出现掉话，信号不稳定等情况，因此，通过实施上述可行的实施方式，基带处理单元将目标子帧的配置信息通知给终端，这样，终端在进行小区信号的测量时，就可以避免测量该目标子帧，可以有效避免出现上述情况。
作为一种可行的实施方式，该目标子帧可以为MBSFN子帧。基带处理单元将该目标子帧的格式进行修改处理，可以是将该目标子帧中使用扩展循环前缀的符号修改为常规循环前缀的符号格式，以使各个符号的符号周期与常规循环前缀的符号的符号周期相同。其中，该目标子帧的符号总数与常规循环前缀子帧的符号总数相同。
射频单元在进行符号检测时，如果检测到存在业务数据发送的第二符号，则按照常规CP的符号周期将PA处于开启状态。可见，通过实施上述可行的实施方式，当BBU对目标子帧进行格式修改后，如果RU检测到不存在业务数据发送的第一符号，则也可以按照常规CP的符号周期将PA进行关断处理，减少了BBU和RU之间的传输资源开销，简化了符号关断的流程。
作为一种可行的实施方式，该基带处理单元根据小区的当前业务量，确定需要节能的目标子帧之前，还可以判断关于目标子帧的配置功能是否处于开启状态，如果关于该目标子帧的配置功能处于开启状态，则可以执行根据小区的当前业务量，确定需要节能的目标子帧。
作为一种可行的实施方式，该目标子帧的配置功能可以由用户开启，用户可通过基站侧配置端开启指令，基带处理单元接收到该开启指令，可根据该开启指令确定目标子帧的配置功能已开启。
作为一种可行的实施方式，该基带处理单元根据小区的当前业务量，确定需要节能的目标子帧，可以是按照预设周期检测小区的当前业务量，并根据检测到的当前业务量确定在该预设周期内需要节能的目标子帧。其中，确定内容至少包括该目标子帧的数量以及该目标子帧的位置信息。
可见，通过实施上述可选的实施方式，该基带处理单元可以根据小区的当前业务量对目标子帧进行周期性的判定和调整，使配置的目标子帧能够更好的适配于当前业务量，不影响业务数据的正常传输。
第二方面，本申请提供了一种符号处理方法，可应用于射频单元，该方法可包括：射频单元检测各个符号的前N个采样点的数值，如果检测到存在第一符号的前N个采样点的数值全为0，则可以确定该第一符号没有业务数据发送，该射频单元便可在该第一符号的符号周期内将功率放大器进行关断处理。
其中，每个符号的符号周期均相同，基带处理单元通过将业务空闲的目标子帧的格式进行修改处理，使得每个符号的符号周期相同。
通过实施上述第二方面所示的方法，基带处理单元将业务空闲的子帧格式进行修改，使得每个符号的长度实现了归一化，也即，使每个符号的符号周期都相同，在射频单元进 行符号关断的处理过程中，可以按照相同的符号周期进行关断处理，不需要射频单元和基站处理单元进行事先交互，在一定程度上减少占用信息资源，并简化了符号关断的流程。
作为一种可行的实施方式，该射频单元如果检测到存在第二符号的前N个采样点的数值不全为0，则可以确定第二符号有业务数据发送，并在第二符号的符号周期到来前的预设时间点，将功率放大器进行开启处理。
由于开启功率放大器需要一定的时间，通过实施上述可行的实施方式，射频单元当检测到存在有业务数据发送的第二符号时，提前一段时间将功率放大器开启，可以不影响业务数据的正常传输。
第三方面，提供了一种基带处理单元，该基带处理单元具有实现上述第一方面或第一方面可能的实现方式中基带处理单元行为的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。该模块可以是软件和/或硬件。基于同一发明构思，由于该基带处理单元解决问题的原理以及有益效果可以参见上述第一方面和第一方面的各可能的方法实施方式以及所带来的有益效果，因此该基带处理单元的实施可以参见上述第一方面和第一方面的各可能的方法实施方式，重复之处不再赘述。
第四方面，提供了一种射频单元，该射频单元具有实现上述第二方面或第二方面可能的实现方式中射频单元行为的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。该模块可以是软件和/或硬件。基于同一发明构思，由于该射频单元解决问题的原理以及有益效果可以参见上述第二方面和第二方面的各可能的方法实施方式以及所带来的有益效果，因此该射频单元的实施可以参见上述第二方面和第二方面的各可能的方法实施方式，重复之处不再赘述。
第五方面，提供了一种基站，该基站包括射频单元以及基带处理单元，该基带处理单元可实现如上述第一方面的方法设计中的方案，该基带处理单元解决问题的实施方式以及有益效果可以参见上述第一方面和第一方面的各可能的方法的实施方式以及有益效果，重复之处不再赘述；该射频单元可实现如上述第二方面的方法设计中的方案，该射频单元解决问题的实施方式以及有益效果可以参见上述第二方面和第二方面的各可能的方法的实施方式以及有益效果，重复之处不再赘述。
第六方面，提供了一种基站，包括：存储器，用于存储一个或多个程序；处理器，用于调用存储在该存储器中的程序以实现上述第一方面的方法设计中的方案，该基站解决问题的实施方式以及有益效果可以参见上述第一方面和第一方面的各可能的方法的实施方式以及有益效果，重复之处不再赘述。
第七方面，提供了一种计算机可读存储介质，所述计算机存储介质存储有计算机程序，所述计算机程序包括程序指令，所述程序指令当被处理器执行时使所述处理器执行上述第一方面的方法和第一方面的各可能的方法的实施方式以及有益效果，和/或第二方面的方法和第二方面的各可能的方法的实施方式以及有益效果，重复之处不再赘述。
附图说明
图1为本申请实施例提供的一种基站的结构示意图；
图2为本申请实施例提供的一种LTE无线帧的结构示意图；
图3为本申请实施例提供的一种MBSFN子帧的结构示意图；
图4为本申请实施例提供的一种多载波共用一个PA的场景示意图；
图5为本申请实施例提供的一种单载波使用一个PA的场景示意图；
图6为本申请实施例提供的另一种多载波共用一个PA的场景示意图；
图7为本申请实施例提供的一种符号处理的流程示意图；
图8为本申请实施例提供的一种目标子帧的结构示意图；
图9为本申请实施例提供的一种符号处理方法的流程示意图；
图10为本申请实施例提供的另一种符号处理方法的流程示意图；
图11为本申请实施例提供的一种基带处理单元的结构示意图；
图12为本申请实施例提供的一种射频单元的结构示意图；
图13为本申请实施例提供的另一种基站的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行相应地描述。
为了更好理解本发明实施例提供的一种符号处理方法及相关设备，下面先描述本申请所涉及的一种基站的结构。需要说明的是，该基站可以应用于不限于长期演进(Long Term Evolution，LTE)的移动通信系统、未来演进的第五代移动通信(the 5th Generation，5G)系统、新空口(NR)系统、机器与机器通信(Machine to Machine，M2M)系统等。
请参阅图1，是本申请实施例提供的一种基站的结构示意图。该基站101可以是时分同步码分多址(Time Division Synchronous Code Division Multiple Access，TD-SCDMA)系统中的基站收发台(Base Transceiver Station，BTS)，也可以是LTE系统中的演进型基站(Evolutional Node B，eNodeB)，以及5G系统、新空口(NR)系统中的基站。另外，基站也可以为接入点(Access Point，AP)、传输节点(Trans TRP)、中心单元(Central Unit，CU)或其他网络实体，并且可以包括以上网络实体的功能中的一些或所有功能。
具体的，该基站101可由基带处理单元(Baseband Unit，BBU)和射频单元(Radio Unit，RU)这两个基本功能模块组成。其中，BBU可完成Uu接口的基带处理功能(编码、复用、调制和扩频等)、信令处理、本地和远程操作维护等功能，以及该基站的工作状态监控和告警信息上报功能。RU中可以包括至少一个功率放大器(Power Amplifier，PA)。
基站的功耗是整个移动网络功耗的重要组成部分。而在基站中，RU的功耗占据了主要部分，其中，PA的功耗占比在RU中又很高。PA通常情况下，一直处于开启状态，即使没有数据发送的时刻，PA也会产生功耗。对于基站而言，如果在无实际内容发送的符号周期内将PA关断，则可以有效地降低RU的功耗。
以长期演进(Long Term Evolution，LTE)为例，请参阅图2，为本申请实施例提供的一种LTE无线帧的结构示意图。从图2可以看出，一个无线帧的长度为10ms，可以包含10个子帧，每个子帧中又包含2个时隙(slot)，每个时隙是0.5ms。对于常规循环前缀(Cyclic Prefix，CP)来说，一个子帧可以包含14个符号；对于扩展CP，一个子帧可以包含12个符号。
在每一个子帧中，存在一些固定的符号位置有导频符号，该导频符号存在一些特殊数 据，必须进行发送，因此在该导频符号的符号周期内，不能够关断PA，但是除导频符号外的其他符号如果没有传输实际的业务数据，则RU可以在该符号周期内将PA关断。同时，如果小区的负载越低(即小区业务量越低)，这类没有传输实际内容的空闲符号也就越多，符号关断(也即在该符号的符号周期内将PA关断)的触发机会也就越多。
为了增加符号关断的机会，在小区负载(即小区业务量)较低时，可以将业务数据集中在某几个子帧内进行调度，而将其他子帧空出来，成为空闲子帧。进一步的，可以将这些空闲子帧配置成多媒体广播多播单频网(Multimedia Broadcast Multicast Service Single Frequency Network，MBSFN)子帧的格式。由于MBSFN子帧含有的导频符号更少，将空闲子帧配置成MBSFN子帧可以使符号关断的机会更多。
下面请参阅图3，为本申请实施例提供的一种MBSFN子帧的结构示意图。从图3可以看出，MBSFN子帧中的符号，可以划分为非MBSFN区域(Non-MBSFN Region)和MBSFN区域(MBSFN Region)两个部分。其中，Non-MBSFN Region可配置1～2个符号。除去Non-MBSFN Region外，剩下的符号均为MBSFN Region。Non-MBSFN Region的每个符号的CP长度与其所在无线帧子帧0的CP长度(一般为常规CP)相同，而MBSFN Region符号可以采用扩展CP。为保证时序对齐，在Non-MBSFN Region的最后一个常规CP的符号后面用0填充一部分空白区域。需要说明的是，图3中是以Non-MBSFN Region含两个常规CP的符号为例。
可以看出，当配置了MBSFN子帧时，会存在不同长度的符号，当RU进行符号关断时就需要针对两种不同长度的符号进行处理。对于符号关断的具体实现，通常有两种方式，一种是BBU控制RU进行符号关断；另一种是RU事先和基带处理单元(Baseband Unit，BBU)进行信息交互，从BBU处知道每个符号的起始位置和长度，然后自身判定哪些符号没有数据发送并将其关断。上述两种方式均需要RU与BBU进行交互，占用了较多的信息资源，过程也较为繁琐。
同时，对于多个LTE载波共用同一个PA的场景中，如果在某一个时刻，不同载波上的子帧格式不同。例如，如图4所示，载波1采用常规CP的子帧格式，载波2配置了MBSFN子帧，则这两类子帧只能保证子帧的首尾对齐，但由于MBSFN子帧中有的采用扩展CP的子帧格式，其长度与常规CP的子帧不同，因此，载波1里面的MBSFN区域中符号的边界与对应的载波2的常规CP的边界(例如载波1的符号5的边界与载波2的符号4的边界)是错位的。这时，由于多载波共用同一个PA的场景中，常规CP子帧与MBSFN子帧同一时间共存时的部分符号边界未对齐(也即符号的符号周期不同)的问题，在进行符号关断的时候，上述两种方式均会导致在载波1和载波2不能够有效地进行符号关断。
为此，本申请还提出了一种符号处理方法及相关设备，可以在一定程度上减少占用信息资源，并简化符号关断的流程。同时，还可解决在多载波共用同一个PA时，常规CP子帧和MBSFN子帧共存，符号长度不同导致的RU在进行符号关断时无法准确划分符号边界，不能有效进行符号关断的问题。
举例来说，本申请所示的符号处理方法可应用于以下两种场景。
场景一：单个PA上配置了单个载波。例如，如图5所示，在单个PA上，只对应配置了一个无线帧，该无线帧中可包括常规CP子帧以及MBSFN子帧。在此场景下，不涉及多 载波共用一个PA时，不同载波间符号不对齐的问题。
场景二：单个PA上配置了多个载波。举例来说，如图6所示，一个PA上配置了两个载波，分别为载波1以及载波2，载波1上的子帧均为常规CP子帧，载波2上的子帧包括常规CP子帧以及MBSFN子帧两种格式。
在一个实施例中，上述两种场景的无线帧可以最多配置有6个MBSFN子帧。应知，上述两类场景只是举例，而非穷举，不应作为对本申请的限定。
请继续参阅图7，为本申请提供的一种符号处理的流程示意图。在701中，BBU可以根据小区当前业务量确定目标子帧的配置数目和具体位置，并对目标子帧进行配置。
在一个实施例中，BBU可以根据小区当前业务量(可参考小区的下行物理资源块(physical resource block，PRB)利用率)决定可以配置的目标子帧数目，以及该目标子帧的具体位置，并可以限制只可在没有配置为目标子帧格式的其他子帧中调度业务。
在一个实施例中，该目标子帧可以为MBSFN子帧。BBU可以对确定的MBSFN子帧的格式进行修改，将MBSFN Region中用扩展CP的符号修改为常规CP的符号，整个子帧的符号总数可以维持在14个。由于在这类MBSFN子帧中并不传输有效数据，因此，修改子帧格式并不影响终端用户的解调。举例来说，请参阅图8，目标子帧中的所有符号的长度均相同，每个符号的长度可与常规CP子帧的符号的长度一样。
在一个实施例中，对该目标子帧配置完后，BBU可以通过系统消息将这些目标子帧的配置信息告知终端。
需要说明的是，如图8中导频符号的位置是以双天线端口场景为例，应知，在其他场景中，该导频符号的位置可以为其他位置。
在702中，BBU配置完目标子帧之后，RU可以进行符号关断的判决，并控制PA的开启状态。
在一个实施例中，RU对子帧的每个符号的前N个采样点的数值是否全为零来判定该符号是否有业务数据发送。当判定存在无业务数据发送的第一符号时，在该第一符号的符号周期内将PA关断以节省RU功耗。
举例来说，如果在上述场景一的情况下，单个PA上只配置了单个载波，那么，BBU对单个载波上的目标子帧的格式进行修改，使各个符号的长度与常规CP的符号长度相同，也即使各个符号的符号周期与常规CP的符号周期相同，然后RU可对每一个符号的前N个采样点的数值进行判定，当判定在该载波上存在无业务数据发送的第一符号时，在该第一符号的符号周期内将PA关断以节省RU功耗。
又举例来说，如果在上述场景二的情况下，单个PA上配置了多个载波，那么，BBU可以首先对该多个载波上的目标子帧的格式进行修改，以使各个符号的长度与常规CP的符号长度相同，也即使各个符号的符号周期与常规CP的符号周期相同，然后RU可同时对该多个载波对齐的符号的前N个采样点的数值进行判定，当判定在该多个载波上对齐的符号位置处，均存在无业务数据发送的第一符号时，则在该第一符号的符号周期内将PA关断以节省RU功耗。
可见，由于通过修改目标子帧的格式，将每个符号的长度进行了统一，使每个符号的符号周期相同，因此不再需要BBU将子帧格式发送给RU，RU可以根据常规CP的符号长度 进行符号关断操作。由于BBU和RU之间不再进行信息交互，可以在一定程度上减少占用信息资源，同时也简化了符号关断的流程。
为更清楚的描述本申请，下面介绍本申请的方法实施例。
请参阅图9，为本申请提供的一种符号处理方法的流程示意图。如图9所示的方法可包括：
901、BBU根据小区的当前业务量，确定需要节能的目标子帧。
其中，该目标子帧为业务空闲的子帧。BBU可以确定需要节能的目标子帧的数量以及该目标子帧的位置信息。
在一个实施例中，小区的当前业务量可以根据小区的下行PRB利用率来衡量。举例来说，如果该下行PRB利用率为10％，BBU可以确定需要节能的目标子帧为5个；如果该下行PRB利用率为10％-30％，BBU可以确定需要节能的目标子帧为4个；如果该下行PRB利用率为30％-50％，BBU可以确定需要节能的目标子帧为2个。当然，上述方式只是举例，而非穷举，包含但不限于上述可选方式。
在一个实施例中，BBU可以确定该目标子帧的格式为MBSFN子帧的格式。由于MBSFN子帧含有的导频符号更少，将空闲子帧配置成MBSFN子帧可以使符号关断的机会更多。举例来说，该MBSFN子帧的格式可以如图3所示。
在一个实施例中，BBU根据小区的当前业务量，确定需要节能的目标子帧之前，还可以判断关于目标子帧的配置功能是否处于开启状态；若关于目标子帧的配置功能处于开启状态，则执行根据小区的当前业务量，确定需要节能的目标子帧。
举例来说，用户可以通过基站侧配置端发送开启指令给BBU，该开启指令可用于开启该目标子帧的配置功能，BBU在接收到该开启指令时，便可确定关于该目标子帧的配置功能处于开启状态。
在一个实施例中，如果BBU确定关于该目标子帧的配置功能处于关闭状态，则可以不执行如901以及902所示的流程。
在一个实施例中，如果BBU确定关于该目标子帧的配置功能处于关闭状态，也可以在确定出目标子帧之后，不对目标子帧的格式进行修改处理，也即，按照MBSFN子帧的原有格式进行目标子帧的相应配置。进一步的，可以由BBU控制RU进行PA关断，或者，BBU事先与PA进行信息交互，将配置的符号的位置及符号长度等信息告知给RU，当RU检测到不存在业务数据发送的第一符号时，按照BBU事先告知的信息确定该第一符号的符号周期，并在该第一符号的符号周期内将PA进行关断。
902、BBU将目标子帧的格式进行修改处理，以使各个符号的符号周期相同。
在一个实施例中，该目标子帧为MBSFN子帧，将该目标子帧的格式进行修改处理，可以包括：将该目标子帧中使用扩展CP的符号修改为常规CP的符号格式，以使该目标子帧中的各个符号的符号周期与常规CP的符号的符号周期相同；其中，该目标子帧的符号总数与常规CP子帧的符号总数相同。
举例来说，配置了MBSFN子帧的载波中，可以包括两类子帧：MBSFN子帧以及常规CP子帧。其中，MBSFN子帧可以包括两类符号：扩展CP的符号以及常规CP的符号，扩 展CP的符号长度与常规CP的符号长度不同。常规CP子帧中可包括常规CP的符号。BBU将MBSFN子帧中使用扩展CP的符号修改为常规CP的符号格式，使各个符号的符号长度均与常规CP子帧的符号长度相同，也即，各个符号的符号周期与常规CP的符号周期相同。
一般情况下，RU在进行符号检测时，如果检测到存在业务数据发送的第二符号，则按照常规CP的符号周期将PA处于开启状态，当BBU对目标子帧进行格式修改后，如果RU检测到不存在业务数据发送的第一符号，则也可以按照常规CP的符号周期将PA进行关断处理。当各个符号的符号长度统一后，BBU不再需要将子帧的格式及位置等信息告知RU，从而减少了BBU和RU之间的传输资源开销，简化了符号关断的流程。
同时，BBU使该MBSFN子帧的符号总数与常规CP子帧的符号总数相同，可以在多载波共用一个PA时，使各个符号的边界能够对齐，例如图8所示，常规CP子帧的符号与修改后的目标子帧的符号的边界能够对齐，当RU检测到不同载波上的相同位置上均存在没有业务数据发送的第一符号，则可以按照常规CP的符号周期将PA进行关断处理。
在一个实施例中，将目标子帧的格式进行修改处理之后，还包括：将该目标子帧的配置信息通知给终端，以使该终端避开测量该目标子帧；其中，该配置信息至少包括该目标子帧的数量以及该目标子帧的位置信息。
BBU在对目标子帧的格式修改完成之后，可以将修改后的目标子帧的数量以及位置信息等通过系统消息告知给终端，终端在进行小区信号的测量时，就可以避免测量该目标子帧。由于目标子帧的格式进行了修改，如果终端对目标子帧进行了小区测量，在目标子帧的预设位置可能不会测到RS符号，则可能会误判小区信号较差，从而出现掉话，信号不稳定等情况，因此，提前通过系统消息告知给终端，可以有效避免上述情况。
在一个实施例中，BBU和终端的交互流程可参考对MBSFN子帧配置变更后的通知流程，在此不作详细阐述。
在一个实施例中，根据小区的当前业务量，确定需要节能的目标子帧，可以包括：按照预设周期检测小区的当前业务量；根据检测到的当前业务员量确定在该预设周期内需要节能的目标子帧，其中，确定内容至少包括该目标子帧的数量以及该目标子帧的位置信息。
BBU对该目标子帧的配置可以根据小区的业务量情况进行周期性的判定和调整，负载越低，可以配置的目标子帧数目就越多。
举例来说，预设周期可以为100s。BBU每100s测量一次小区的当前业务量，并根据测量得到的当前业务量确定在本次周期内需要节能的目标子帧的数量以及位置。在本次周期结束后，BBU可以重新测量小区的当前业务量，并对目标子帧的数量以及位置进行判定和调整。
在一个实施例中，每次配置发生变更后，BBU都可以通过系统消息将目标子帧的配置信息告知给终端。
可见，通过实施本申请实施例，BBU根据小区的当前业务量，确定需要节能的目标子帧，并将目标子帧的格式进行修改，使载波中的各个符号的符号周期相同，这样，射频单元可以对每个符号进行检测，当检测到存在无业务数据发送的第一符号时，可以按照相同的符号周期对PA进行关断处理，不再需要BBU与RU进行信息交互，告知RU符号关断的周期以及位置等内容，从而减少了BBU和RU之间的信息资源开销，简化了符号关断的 实现流程。
下面请参阅图10，图10为本申请实施例提供的另一种符号处理方法的流程示意图，如图10所示的方法可包括：
1001、RU检测各个符号的前N个采样点的数值，其中，N为大于0的正整数。
在一个实施例中，N值可以根据小区的带宽确定。例如，小区带宽为20MHz，RU则可以检测每个符号的前32个采样点；如果小区带宽是10M Hz，RU则可以检测每个符号的前16个采样点；如果小区带宽是5M Hz，RU则可以检测每个符号的前8个采样点。
其中，一个采样点的长度可以根据采样频率来确定。举例来说，当小区带宽为20MHz时，采样频率可以为30.72MHz，一个采样点的长度可以为1/30.72ms；当小区带宽为10MHz时，采样频率可以为15.36MHz，一个采样点的长度可以为1/15.36ms。当然，上述方式只是举例，而非穷举，包括但不限于上述可选方式。
1002、RU若检测到存在第一符号的前N个采样点的数值全为0，则确定第一符号无业务数据发送。
在一个实施例中，如果RU检测到第一符号的前N个采样点的数值全为0，则可以认为该第一符号没有业务数据发送，该第一符号为业务空闲的符号。
1003、RU在第一符号的符号周期内将功率放大器进行关断处理，其中，各个符号的符号周期相同。
在一个实施例中，BBU通过将目标子帧的格式进行修改处理，使各个符号的符号周期相同，目标子帧为业务空闲的子帧。
BBU可根据小区的当前业务量，确定需要节能的目标子帧，并将目标子帧的格式进行修改，使载波中的各个符号的符号周期相同。
在一个实施例中，该符号周期可以与常规CP子帧的符号周期相同。RU在检测到存在第一符号的前N个采样点的数值全为0的时候，可以按照常规CP子帧的符号周期将功率放大器进行关断处理。
在一个实施例中，RU在将功率放大器关断之后，如果检测到存在第二符号的前N个采样点的数值不全为0，则确定该第二符号有业务数据发送；在该第二符号的符号周期到来前的预设时间点，将该功率放大器进行开启处理。
举例来说，该预设时间点可以以微秒计。RU在第一符号的符号周期内将PA进行关断处理之后，继续测量后续的符号，如果测量到第二符号的前N个采样点的数值不全为0，则可以在第二符号的符号周期到来的前m个微秒，提前将功率放大器开启，以不影响业务数据的正常传输。
可见，通过实施本申请实施例，RU检测各个符号的前N个采样点的数值，如果检测到存在第一符号的前N个采样点的数值全为0，则可以确定该第一符号无业务数据发送，并在该第一符号的符号周期内将PA进行关断处理，BBU不再需要将子帧的配置信息告知给RU，RU便可按照固定的符号周期对PA进行关断处理，从而减少了BBU和RU之间的信息资源开销，简化了符号关断的实现流程。
下面请参阅图11，为本申请实施例提供的一种基带处理单元的结构示意图。如图11所示的基带处理单元可包括：
确定模块1101，用于根据小区的当前业务量，确定需要节能的目标子帧。
该目标子帧为业务空闲的子帧。
处理模块1102，用于将该目标子帧的格式进行修改处理，以使各个符号的符号周期相同。
在一个实施例中，该基带处理单元还包括：通知模块1103，用于将该目标子帧的配置信息通知给终端，以使该终端避开测量该目标子帧。
其中，该配置信息至少包括该目标子帧的数量以及该目标子帧的位置信息。
在一个实施例中，该目标子帧为多媒体广播多播单频网MBSFN子帧。
该处理模块1102，具体用于将该目标子帧中使用扩展循环前缀的符号修改为常规循环前缀的符号格式，以使各个符号的符号周期与常规循环前缀的符号的符号周期相同；其中，该目标子帧的符号总数与常规循环前缀子帧的符号总数相同。
在一个实施例中，该基带处理单元还包括：判断模块1104，用于判断关于目标子帧的配置功能是否处于开启状态；若该关于目标子帧的配置功能处于开启状态，则通过该确定模块1101执行根据小区的当前业务量，确定需要节能的目标子帧。
在一个实施例中，该确定模块1101，具体用于按照预设周期检测小区的当前业务量，根据检测到的当前业务员量确定在该预设周期内需要节能的目标子帧，其中，确定内容至少包括该目标子帧的数量以及该目标子帧的位置信息。
下面请参阅图12，为本申请实施例提供的一种射频单元的结构示意图。如图12的射频单元可包括：
检测模块1201，用于检测各个符号的前N个采样点的数值，其中，N为大于0的正整数。
确定模块1202，用于若检测到存在第一符号的前N个采样点的数值全为0，则确定该第一符号无业务数据发送。
处理模块1203，用于在该第一符号的符号周期内将功率放大器进行关断处理，其中，各个符号的符号周期相同。
其中，基带处理单元通过将目标子帧的格式进行修改处理，使各个符号的符号周期相同，该目标子帧为业务空闲的子帧。
在一个实施例中，该确定模块1202，还用于若检测到存在第二符号的前N个采样点的数值不全为0，则确定该第二符号有业务数据发送。
该处理模块1203，还用于在该第二符号的符号周期到来前的预设时间点，将该功率放大器进行开启处理。
下面请参阅图13，为本申请实施例提供的另一种基站的结构示意图。如图13的基站可包括：
一个或多个处理器1301、存储器1302、通信接口1303、发射器1305、接收器1306、 耦合器1307和天线1308。这些部件可通过总线1304或者其他式连接，图13以通过总线连接为例。其中：
通信接口1303可用于网络设备与其他通信设备，例如终端设备或其他网络设备，进行通信。具体的，所述终端设备可以是图9所示的终端设备。具体的，通信接口1303通信接口903可以是长期演进(LTE)(4G)通信接口，也可以是5G或者未来新空口的通信接口。不限于无线通信接口，网络设备还可以配置有有线的通信接口1303来支持有线通信，例如一个网络设备与其他网络设备之间的回程链接可以是有线通信连接。
发射器1305可用于对处理器1301输出的信号进行发射处理，例如信号调制。接收器1306可用于对天线1308接收的移动通信信号进行接收处理。例如信号解调。在本申请的一些实施例中，发射器1305和接收器1306可看作一个无线调制解调器。在网络设备中，发射器1305和接收器1306的数量均可以是一个或者多个。天线1308可用于将传输线中的电磁能转换成自由空间中的电磁波，或者将自由空间中的电磁波转换成传输线中的电磁能。耦合器1307可用于将移动通信号分成多路，分配给多个的接收器1306。
存储器1302与处理器1301耦合，用于存储各种软件程序和/或多组指令。具体的，存储器1302可包括高速随机存取的存储器，并且也可包括非易失性存储器，例如一个或多个磁盘存储设备、闪存设备或其他非易失性固态存储设备。存储器1302可以存储操作系统(下述简称系统)，例如uCOS、VxWorks、RTLinux等嵌入式操作系统。存储器1302还可以存储网络通信程序，该网络通信程序可用于与一个或多个附加设备，一个或多个终端设备，一个或多个网络设备进行通信。
处理器1301可用于进行无线信道管理、实施呼叫和通信链路的建立和拆除，并为本控制区内的用户提供小区切换控制等。具体的，处理器1301可包括：管理/通信模块(Administration Module/Communication Module，AM/CM)(用于话路交换和信息交换的中心)、基本模块(Basic Module，BM)(用于完成呼叫处理、信令处理、无线资源管理、无线链路的管理和电路维护功能)、码变换及子复用单元(Transcoder and SubMultiplexer，TCSM)(用于完成复用解复用及码变换功能)等等。
本申请实施例中，处理器1301可用于读取和执行计算机可读指令。在一个实施例中，处理器1301可调用存储器1302中的程序执行以下步骤：
根据小区的当前业务量，确定需要节能的目标子帧，所述目标子帧为业务空闲的子帧；
将所述目标子帧的格式进行修改处理，以使各个符号的符号周期相同；
检测各个符号的前N个采样点的数值，其中，N为大于0的正整数；
若检测到存在第一符号的前N个采样点的数值全为0，则确定所述第一符号无业务数据发送；
在所述第一符号的符号周期内将功率放大器进行关断处理，其中，各个符号的符号周期相同。
还需要说明的是，处理器1301可用于调用存储于存储器1302中的程序，例如本申请的一个或多个实施例提供的功率调整方法在网络设备侧的实现程序，并执行该程序包含的指令，在此不作赘述。
可以理解的，网络设备可以是图1示出的基站101，可实施为基站收发台，无线收发 器，一个基本服务集(BSS)，一个扩展服务集(ESS)，NodeB，eNodeB，接入点或TRP等等。
需要说明的，图13所示的网络设备仅仅是本申请实施例的一种实现方式，实际应用中，网络设备还可以包括更多或更少的部件，这里不作限制。
应理解，本发明实施例是对应方法实施例的实体装置实施例，对方法实施例的描述，也适用于本发明实施例。
在本申请的另一实施例中提供一种计算机可读存储介质，该计算机可读存储介质存储有程序，该程序被处理器执行时，可以实现本申请中终端设备所示的方法，或实现网络设备所示的方法。
需要说明的是，该计算机可读存储介质被处理器执行的具体过程可参见上述方法实施例中所描述的方法，在此不再赘述。
在本发明的又一实施例还提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述方法实施例所述的方法。
所述计算机可读存储介质可以是前述任一实施例所述的终端的内部存储单元，例如终端的硬盘或内存。所述计算机可读存储介质也可以是所述计算机的外部存储设备，例如所述计算机上配备的插接式硬盘，智能存储卡(Smart Media Card,SMC)，安全数字(Secure Digital,SD)卡，闪存卡(Flash Card)等。进一步地，所述计算机可读存储介质还可以既包括所述终端的内部存储单元也包括外部存储设备。所述计算机可读存储介质用于存储所述程序以及所述终端所需的其他程序和数据。所述计算机可读存储介质还可以用于暂时地存储已经输出或者将要输出的数据。
基于同一发明构思，本发明实施例中提供的计算机解决问题的原理与本发明方法实施例相似，因此该计算机的实施可以参见方法的实施，为简洁描述，在这里不再赘述。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过程序来指令相关的硬件来完成，上述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，上述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。
以上对本发明实施例所提供的一种符号处理方法及相关设备进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的结构、方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。

Claims (17)

  1. 一种符号处理方法，其特征在于，应用于基带处理单元，所述方法包括：
    根据小区的当前业务量，确定需要节能的目标子帧，所述目标子帧为业务空闲的子帧；
    将所述目标子帧的格式进行修改处理，以使各个符号的符号周期相同。
  2. 如权利要求1所述的方法，其特征在于，所述将所述目标子帧的格式进行修改处理之后，还包括：
    将所述目标子帧的配置信息通知给终端，以使所述终端避开测量所述目标子帧；
    其中，所述配置信息至少包括所述目标子帧的数量以及所述目标子帧的位置信息。
  3. 如权利要求1或2所述的方法，其特征在于，所述目标子帧为多媒体广播多播单频网MBSFN子帧，所述将所述目标子帧的格式进行修改处理，包括：
    将所述目标子帧中使用扩展循环前缀的符号修改为常规循环前缀的符号格式，以使各个符号的符号周期与常规循环前缀的符号的符号周期相同；
    其中，所述目标子帧的符号总数与常规循环前缀子帧的符号总数相同。
  4. 如权利要1所述的方法，其特征在于，所述根据小区的当前业务量，确定需要节能的目标子帧之前，所述方法还包括：
    判断关于目标子帧的配置功能是否处于开启状态；
    若所述关于目标子帧的配置功能处于开启状态，则执行根据小区的当前业务量，确定需要节能的目标子帧。
  5. 如权利要求1所述的方法，其特征在于，所述根据小区的当前业务量，确定需要节能的目标子帧，包括：
    按照预设周期检测小区的当前业务量；
    根据检测到的当前业务员量确定在所述预设周期内需要节能的目标子帧，其中，确定内容至少包括所述目标子帧的数量以及所述目标子帧的位置信息。
  6. 一种符号处理方法，其特征在于，应用于射频单元，所述方法包括：
    检测各个符号的前N个采样点的数值，其中，N为大于0的正整数；
    若检测到存在第一符号的前N个采样点的数值全为0，则确定所述第一符号无业务数据发送；
    在所述第一符号的符号周期内将功率放大器进行关断处理，其中，各个符号的符号周期相同；
    其中，基带处理单元通过将目标子帧的格式进行修改处理，使各个符号的符号周期相同，所述目标子帧为业务空闲的子帧。
  7. 如权利要求6所述的方法，其特征在于，所述方法还包括：
    若检测到存在第二符号的前N个采样点的数值不全为0，则确定所述第二符号有业务数据发送；
    在所述第二符号的符号周期到来前的预设时间点，将所述功率放大器进行开启处理。
  8. 一种基带处理单元，其特征在于，包括：
    确定模块，用于根据小区的当前业务量，确定需要节能的目标子帧，所述目标子帧为业务空闲的子帧；
    处理模块，用于将所述目标子帧的格式进行修改处理，以使各个符号的符号周期相同。
  9. 如权利要求8所述的基带处理单元，其特征在于，还包括：
    通知模块，用于将所述目标子帧的配置信息通知给终端，以使所述终端避开测量所述目标子帧；
    其中，所述配置信息至少包括所述目标子帧的数量以及所述目标子帧的位置信息。
  10. 如权利要求8或9所述的基带处理单元，其特征在于，所述目标子帧为多媒体广播多播单频网MBSFN子帧；
    所述处理模块，具体用于将所述目标子帧中使用扩展循环前缀的符号修改为常规循环前缀的符号格式，以使各个符号的符号周期与常规循环前缀的符号的符号周期相同；其中，所述目标子帧的符号总数与常规循环前缀子帧的符号总数相同。
  11. 如权利要8所述的基带处理单元，其特征在于，还包括：
    判断模块，用于判断关于目标子帧的配置功能是否处于开启状态；
    若所述关于目标子帧的配置功能处于开启状态，则通过所述确定模块执行根据小区的当前业务量，确定需要节能的目标子帧。
  12. 如权利要求8所述的基带处理单元，其特征在于，所述确定模块，具体用于按照预设周期检测小区的当前业务量，根据检测到的当前业务员量确定在所述预设周期内需要节能的目标子帧，其中，确定内容至少包括所述目标子帧的数量以及所述目标子帧的位置信息。
  13. 一种射频单元，其特征在于，包括：
    检测模块，用于检测各个符号的前N个采样点的数值，其中，N为大于0的正整数；
    确定模块，用于若检测到存在第一符号的前N个采样点的数值全为0，则确定所述第一符号无业务数据发送；
    处理模块，用于在所述第一符号的符号周期内将功率放大器进行关断处理，其中，各个符号的符号周期相同；
    其中，基带处理单元通过将目标子帧的格式进行修改处理，使各个符号的符号周期相 同，所述目标子帧为业务空闲的子帧。
  14. 如权利要求13所述的射频单元，其特征在于，
    所述确定模块，还用于若检测到存在第二符号的前N个采样点的数值不全为0，则确定所述第二符号有业务数据发送；
    所述处理模块，还用于在所述第二符号的符号周期到来前的预设时间点，将所述功率放大器进行开启处理。
  15. 一种基站，其特征在于，包括：
    如权利要求1-7任一项所述的基带处理单元；
    如权利要求8和/或9所述的射频单元。
  16. 一种基站，其特征在于，包括：
    存储器，用于存储程序；
    处理器，用于执行所述存储器中的程序，以执行如权利要求1-7任一项所述的方法。
  17. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有程序，所述程序被处理器执行时使所述计算机执行如权利要求1-7任一项所述的方法。
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