WO2018188369A1 - 一种资源调度方法及装置 - Google Patents

一种资源调度方法及装置 Download PDF

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Publication number
WO2018188369A1
WO2018188369A1 PCT/CN2017/117272 CN2017117272W WO2018188369A1 WO 2018188369 A1 WO2018188369 A1 WO 2018188369A1 CN 2017117272 W CN2017117272 W CN 2017117272W WO 2018188369 A1 WO2018188369 A1 WO 2018188369A1
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radio frame
subframe
cces
pdcch
cfi
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PCT/CN2017/117272
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English (en)
French (fr)
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WO2018188369A8 (zh
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刘建青
丁宝国
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京信通信系统（中国）有限公司
京信通信系统（广州）有限公司
京信通信技术(广州)有限公司
天津京信通信系统有限公司
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Publication of WO2018188369A1 publication Critical patent/WO2018188369A1/zh
Publication of WO2018188369A8 publication Critical patent/WO2018188369A8/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a resource scheduling method and apparatus.
  • the downlink control channel (PDCCH) carries Downlink Control Information (DCI), and the PDCCH includes one or more user terminals (User Equipment). , UE) resource allocation information.
  • the UE needs to first solve the DCI carried by the PDCCH, so as to correctly solve the physical downlink shared channel (PDSCH) data corresponding to the DCI.
  • DCI Downlink Control Information
  • UE User Equipment
  • one PDCCH is composed of n (n represents an aggregation level) consecutive Control Channel Elements (CCEs), wherein each CCE is composed of 9 Resource Element Groups (REGs), 1
  • the REGs are composed of four consecutive Resource Elements (REs) located on the same Orthogonal Frequency Division Multiplexing (OFDM) symbol.
  • the number of OFDM symbols occupied by the PDCCH in one subframe is determined by The CFI generally has a value range of ⁇ 1, 2, 3 ⁇ as indicated by the Control Format Indicator (CFI).
  • the number of symbols occupied by the PDCCH determines the number of CCEs that the subframe can be allocated for, and the number of CCEs that the subframe can use for allocation corresponds to the number of UEs that the subframe can schedule.
  • the method for determining the number of symbols occupied by the PDCCH in the prior art is: acquiring information such as the number of UEs to be scheduled in the current cell, the bandwidth usage of the carrier, and the satisfaction of the user, and then determining the number of symbols occupied by the current subframe PDCCH according to the foregoing information.
  • This method requires complex processes such as updating the number of real-time UEs, calculating Key Performance Indication (KPI), and acquiring UE information of other carriers across carriers, resulting in high system operating pressure, low signal processing efficiency, and frequent PDCCH-occupied symbols.
  • KPI Key Performance Indication
  • the number distribution is unreasonable and inaccurate, which in turn leads to degraded performance of the LTE system.
  • the embodiments of the present invention provide a resource scheduling method and device, which are used to solve the technical problem that the symbol allocation of the PDCCH occupied in the prior art is unreasonable and inaccurate, and thus the performance of the LTE system is degraded.
  • a first aspect of the embodiments of the present invention provides a resource scheduling method, including:
  • the CFI is increased, and the CFI satisfies 1 ⁇ CFI ⁇ 3, and the CFI is an integer.
  • the foregoing solution determines the current number according to the CCE usage record of the second radio frame before the current first radio frame and the number of CCEs allocated by the PDCCH for transmitting the common control information in the first subframe of the first radio frame.
  • the total number of CCEs required for transmitting the PDCCH in the first subframe of a radio frame and then according to the determined total number of CCEs required for transmitting the PDCCH in the first subframe of the first radio frame and the first
  • the CFI is dynamically adjusted according to the size relationship of the number of CCEs that can be allocated by the PDCCH of the first subframe of the radio frame, so that the number of CCEs of the first subframe of the first radio frame can satisfy the user's demand and not excessive, and the PDCCH is improved.
  • the above solution is different from the prior art method for determining the number of symbols occupied by the PDCCH.
  • the algorithm of the above method is simpler and the operation process is faster, thereby effectively reducing the operating pressure of the system and improving the efficiency of signal processing.
  • the method further includes: determining that the PDCCH assignable CCE number of the first subframe of the first radio frame corresponding to the reduced CFI value is not less than the The total number of CCEs required to transmit the PDCCH in the first subframe of the first radio frame.
  • the CCE usage record includes: a number of unsuccessfully scheduled users in a first subframe of each radio frame in the at least one second radio frame; before the increasing CFI, the method further The method includes: determining that there is at least one second radio frame that satisfies a constraint condition, where the constraint is that the number of unsuccessfully scheduled users in the first subframe of the second radio frame is greater than a preset threshold.
  • the resource utilization rate of the PDCCH can be further improved, and the operating pressure of the system can be reduced, and the efficiency of signal processing can be improved.
  • the method further includes: if the total number of the CCEs is smaller than the The number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame decreases the CFI, and the CFI satisfies 1 ⁇ CFI ⁇ 3, and CFI is an integer.
  • the resource scheduling method can be further improved, and the resource utilization rate of the PDCCH is further improved, and the operating pressure of the system is reduced, and the efficiency of signal processing is improved.
  • the method before the reducing the current CFI value, further includes: determining that the total number of CCEs is less than a number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, and a scaling factor The product of the scale factor is less than one.
  • the resource scheduling method can be further improved, and the resource utilization rate of the PDCCH is further improved, and the operating pressure of the system is reduced, and the efficiency of signal processing is improved.
  • the CCE usage record includes: a number of unscheduled users in a first subframe of each radio frame in the at least one second radio frame; before the reducing CFI, the method further The method includes: determining that the number of unsuccessfully scheduled users in the first subframe of each of the at least one second radio frame is not greater than a preset threshold.
  • the resource scheduling method can be further improved, and the resource utilization rate of the PDCCH is further improved, and the operating pressure of the system is reduced, and the efficiency of signal processing is improved.
  • the CCE usage record includes: a number of unsuccessfully scheduled users in a first subframe of each of the at least one second radio frame; comparing the total number of the CCEs with the first After the number of CCEs that can be allocated by the PDCCH of the first subframe of the radio frame, the method further includes: if the total number of the CCEs is smaller than the PDCCH assignable CCEs of the first subframe of the first radio frame And determining, by the method, whether the number of unsuccessfully scheduled users in the first subframe of the at least one second radio frame that is at least one radio frame is greater than a preset threshold; if yes, increasing CFI, and the CFI is satisfied 1 ⁇ CFI ⁇ 3, and CFI is an integer.
  • the resource scheduling method can be further improved to ensure that the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame can meet the requirements of all UEs.
  • the at least one second radio frame includes: a previous radio frame of the first radio frame; or a user that is not successfully scheduled in the first subframe of the at least two radio frames before the first radio frame
  • the radio frame with the largest number of CCEs required; or the first subframe of at least two radio frames before the first radio frame schedules the radio frames with the largest number of CCEs that are not available to all users to be scheduled.
  • the resource scheduling method can be further improved, and the resource utilization rate of the PDCCH is further improved, and the operating pressure of the system is reduced, and the efficiency of signal processing is improved.
  • the CCE usage record includes: scheduling, in a first subframe of the second radio frame, a number of CCEs used by the successfully scheduled user, and scheduling all to-be-scheduled in the first subframe of the second radio frame.
  • the number of CCEs used by the successfully scheduled users, the number of CCEs in the first subframe of the second radio frame that are not available to all scheduled users, and the first subframe of the first radio frame are used.
  • the sum of the number of CCEs allocated by the PDCCH for transmitting the common control information is used as the total number of CCEs required for transmitting the PDCCH in the first subframe of the first radio frame.
  • the resource scheduling method can be further improved, and the resource utilization rate of the PDCCH is further improved, and the operating pressure of the system is reduced, and the efficiency of signal processing is improved.
  • the method further includes: recording a CFS usage of the control channel unit PDCCH of the physical downlink control channel PDCCH used for transmitting the user-specific information in the first subframe of the first radio frame. And save it.
  • the resource scheduling method can be further improved, and the resource utilization rate of the PDCCH is further improved, and the operating pressure of the system is reduced, and the efficiency of signal processing is improved.
  • the method also includes initializing a CFI value.
  • the resource scheduling method can be further improved, and the resource utilization rate of the PDCCH is further improved, and the operating pressure of the system is reduced, and the efficiency of signal processing is improved.
  • a second aspect of the embodiments of the present invention provides a resource scheduling apparatus, including: an obtaining unit, configured to obtain a physics for transmitting user-specific information in a first subframe of at least one second radio frame before a current first radio frame
  • the control channel unit CCE of the downlink control channel PDCCH uses a record; the first subframe of the second radio frame is any one of the second radio frames; and the determining unit is configured to use the record according to the CCE Determining, in the first subframe of the first radio frame, the number of CCEs allocated for the PDCCH for transmitting the common control information, determining the total number of CCEs required for transmitting the PDCCH in the first subframe of the first radio frame a judging unit, configured to compare the total number of the CCEs with the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame determined according to the control format indication CFI; When the total number of CCEs is greater than the number of CCEs that can be allocated by the P
  • the CCE usage record includes: a number of unsuccessfully scheduled users in a first subframe of each of the at least one second radio frame; the determining unit is further configured to: Before the large CFI, it is determined that there is at least one second radio frame that satisfies the constraint condition that the number of unsuccessfully scheduled users in the first subframe of the second radio frame is greater than a preset threshold.
  • the adjusting unit is further configured to: after comparing the total number of the CCEs with the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, the total number of the CCEs is less than When the number of CCEs that the PDCCH of the first subframe of the first radio frame can be allocated, the CFI is decreased, and the CFI satisfies 1 ⁇ CFI ⁇ 3, and the CFI is an integer.
  • the determining unit is further configured to: before the reducing the CFI value, determining that the total number of CCEs is smaller than a number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame. The product of the factors, which are less than one.
  • the CCE usage record includes: a number of unsuccessfully scheduled users in a first subframe of each of the at least one second radio frame; the determining unit is further configured to: Before the small CFI, determining that the number of unsuccessfully scheduled users in the first subframe of each of the at least one second radio frame is not greater than a preset threshold.
  • the CCE usage record includes: a number of unscheduled users in a first subframe of each of the at least one second radio frame; the adjusting unit is further configured to: compare the After the total number of CCEs and the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, the total number of CCEs is smaller than the PDCCH of the first subframe of the first radio frame. If the number of CCEs is not greater than the preset threshold in the first subframe of the at least one second radio frame, the CFI is increased, and the CFI satisfies 1 ⁇ CFI ⁇ 3 , CFI is an integer.
  • the at least one second radio frame includes: a previous radio frame of the first radio frame; or a user that is not successfully scheduled in the first subframe of the at least two radio frames before the first radio frame
  • the radio frame with the largest number of CCEs required; or the first subframe of at least two radio frames before the first radio frame schedules the radio frames with the largest number of CCEs that are not available to all users to be scheduled.
  • the CCE usage record includes: scheduling, in a first subframe of the second radio frame, a number of CCEs used by the successfully scheduled user, and scheduling all to-be-scheduled in the first subframe of the second radio frame.
  • the number of CCEs that are not available to the user; the determining unit is specifically configured to: determine a number of CCEs used by the successfully scheduled user in the first subframe of the second radio frame, and a first sub-frame of the second radio frame.
  • the number of CCEs that are not available to all the users to be scheduled are scheduled in the frame, and the sum of the number of CCEs allocated for the PDCCH for transmitting the common control information in the first subframe of the first radio frame, the determined
  • the sum value is the total number of CCEs required to transmit the PDCCH in the first subframe of the first radio frame.
  • the device further includes: a recording unit, configured to record, and save the control channel unit CCE usage of the physical downlink control channel PDCCH for transmitting the user-specific information in the first subframe of the first radio frame.
  • a recording unit configured to record, and save the control channel unit CCE usage of the physical downlink control channel PDCCH for transmitting the user-specific information in the first subframe of the first radio frame.
  • a third aspect of the embodiments of the present invention provides a resource scheduling device, including: a memory for storing an instruction, a communication interface, configured to send a PDCCH to the UE, and a processor connected to the memory and the communication interface, respectively, for executing in the memory.
  • the instruction in the process of executing the instruction, executes the resource scheduling method corresponding to the first aspect of the embodiment of the present invention.
  • the CCE usage record of the second radio frame before the current first radio frame and the CCE allocated by the PDCCH for transmitting the common control information in the first subframe of the first radio frame are used. And determining a total number of CCEs required for transmitting the PDCCH in the first subframe of the current first radio frame, and then determining, according to the determined CCE, the CCE required for transmitting the PDCCH in the first subframe of the first radio frame.
  • the CFI is dynamically adjusted according to the size relationship between the total number of CCEs and the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, so that the number of CCEs of the first subframe of the first radio frame can meet the user's requirements without As for the excess, the resource utilization of the PDCCH is improved.
  • the algorithm used in the method for determining the number of symbols occupied by the PDCCH in the embodiment of the present invention is simpler, and the operation process is faster, which can effectively reduce the operating pressure of the system and improve the signal.
  • the problem that the symbol allocation of the PDCCH occupied by the PDCCH in the prior art is unreasonable and inaccurate is solved, and the performance of the LTE system is improved.
  • the embodiment of the present invention determines the number of CCEs allocated by the PDCCH for transmitting common control information according to the periodicity of scheduling of a part of the common channel and information by the system, according to the number of the current common channel and the aggregation level of the common channel PDCCH.
  • the algorithm is simplified, the operating pressure of the system is reduced, the accuracy of the symbol allocation of the PDCCH is further improved, and the performance of the LTE system is improved.
  • FIG. 1 is a schematic flowchart of a resource scheduling method according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a first radio frame and a second radio frame according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a resource scheduling apparatus according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a resource scheduling device according to an embodiment of the present invention.
  • the first embodiment of the present invention provides a resource scheduling method, which is applied to an LTE system.
  • the main body of the resource scheduling method is a base station. Referring to FIG. 1, the method specifically includes the following steps:
  • Step 110 Obtain a control channel unit CCE usage record of a physical downlink control channel PDCCH for transmitting user-specific information in a first subframe of at least one second radio frame before the current first radio frame.
  • the second radio frame time is earlier than the first radio frame time, and the first subframe of the second radio frame may be any one of the 0 to 9 subframes included in the second radio frame.
  • the number of the first subframe of the first radio frame and the number of the first subframe of the second radio frame correspond to each other.
  • the location number of the first subframe of the current first radio frame is 1, the location number of the first subframe of the second radio frame in the second radio frame also corresponds to 1; if the current The location number of the first subframe of a radio frame is 2, and the location number of the first subframe of the second radio frame also corresponds to 2, and so on. This part is well known to those skilled in the art and will not be described in detail herein.
  • the number of the second radio frames may be one or multiple, and the number of the second radio frames is not specifically limited in the embodiment of the present invention.
  • the case where the number of the second radio frames is one includes: at least one second radio frame is a previous radio frame of the first radio frame, and at least one second radio frame is at least two radio frames before the first radio frame.
  • the radio frame with the largest number of CCEs required by the user is not successfully scheduled in the first subframe, and at least one second radio frame is scheduled for all users to be scheduled in the first subframe of at least two radio frames before the first radio frame.
  • the control channel unit CCE usage record of the physical downlink control channel PDCCH for transmitting user-specific information in the first subframe of the at least one second radio frame includes: in the first subframe of each radio frame in the at least one second radio frame The number of CCEs used by the user to be successfully scheduled, the number of CCEs required by the user in the first subframe of each radio frame in at least one second radio frame, and the number of CCEs in at least one second radio frame In the first subframe, the number of CCEs that are not available to the user to be scheduled is scheduled, and the number of users that are not successfully scheduled in the first subframe of each radio frame in the at least one second radio frame, and the like, No specific restrictions are imposed.
  • Step 120 Determine, according to the CCE usage record and the number of CCEs allocated in the first subframe of the first radio frame, which are PDCCHs for transmitting common control information, to determine the first radio frame. The total number of CCEs required to transmit the PDCCH in the first subframe.
  • the step 120 may include: step 121, step 122, and step 123.
  • Step 121 Determine the number of CCEs required for the PDCCH for transmitting user-specific information in the first subframe of the current first radio frame.
  • Determining, in the first subframe of the current first radio frame, that the first subframe of the current first radio frame is used for sending, according to a control channel unit CCE usage record of a physical downlink control channel PDCCH for transmitting user-specific information in the first subframe of the second radio frame The number of CCEs required for the PDCCH of user-specific information.
  • the method for determining the number of CCEs required for transmitting the PDCCH of the user-specific information in the first subframe of the current first radio frame is different.
  • the number of CCEs required for transmitting the PDCCH of the user-specific information in the first subframe of the first radio frame is:
  • NCCE est NCCE fail + NCCE spec ;
  • the NCCE spec is the number of CCEs used by the successfully scheduled user in the first subframe of the second radio frame; the NCCE fail is the number of CCEs required for the user to be unsuccessfully scheduled in the first subframe of the second radio frame or The number of CCEs that are not available to all users to be scheduled is scheduled in the first subframe of the second radio frame, and the number of CCEs required by the user and the first of the second radio frame are not successfully scheduled in the first subframe of the second radio frame.
  • the number of CCEs that are not available to all scheduled users in the subframe may be the same or different.
  • determining the current first wireless according to the number of CCEs required for unsuccessful scheduling of users in the first subframe of the second radio frame and the number of CCEs required for unsuccessful scheduling of users in the first subframe of the second radio frame.
  • determining the current first according to the number of CCEs that are not available to all the users to be scheduled in the first subframe of the second radio frame and the number of CCEs that are not successfully scheduled in the first subframe of the second radio frame.
  • the number of CCEs required for transmitting the PDCCH of the user-specific information in the first subframe of the radio frame the number of CCEs that are not required to be scheduled for all users to be scheduled in the first subframe of the second radio frame is 8,
  • the number of CCEs used by the successfully scheduled user in the first subframe of the second radio frame is 36
  • the first subframe of the first radio frame is the CCE required for transmitting the PDCCH of the user-specific information.
  • the number of CCEs required for transmitting the PDCCH of the user-specific information in the first subframe of the first radio frame is:
  • the average value of the number of CCEs required by the user in the first subframe of the second radio frame that is not successfully scheduled (or the number of CCEs that are not required to be scheduled in the first subframe of the second radio frame)
  • the average of the number of CCEs used by the user in the first subframe of the second radio frame (
  • the at least one second radio frame includes a third radio frame and a fourth radio frame before the first radio frame, where the number of CCEs required by the user in the first subframe of the third radio frame is 12, The number of CCEs required for the unscheduled user in the first subframe of the fourth radio frame is 20, and the number of CCEs used by the successfully scheduled user in the first subframe of the third radio frame is 32, and the fourth radio frame is used.
  • Step 122 Determine the number of CCEs allocated to the PDCCH for transmitting common control information in the first subframe of the current first radio frame.
  • the number of CCEs allocated for the PDCCH for transmitting the common control information in the first subframe of the first radio frame is the aggregation level of the PDCCH for transmitting the common control information in the first subframe of the first radio frame and the first The first subframe of a radio frame is determined by the number of PDCCHs used to transmit common control information. For example, the number of PDCCHs for transmitting common control information in the first subframe of the first radio frame is 2, and the aggregation level of the PDCCH for transmitting common control information in the first subframe of the first radio frame is 8.
  • the method for determining the number of CCEs allocated by the PDCCH for transmitting the common control information may be: according to the current common channel, in order to enable all the subframes to meet the requirement of the PDCCH for transmitting the common control information.
  • Step 123 Determine the total number of CCEs required for transmitting the PDCCH in the first subframe of the first radio frame.
  • the total number of CCEs required for transmitting the PDCCH in the first subframe of the first radio frame is equal to the number of CCEs required for the PDCCH for transmitting user-specific information in the first subframe of the first radio frame.
  • step 121 may be performed before the step 122, or may be performed after the step 122, and may be performed at the same time.
  • the order of the step 121 and the step 122 is not specifically limited in the embodiment of the present invention.
  • the PDCCH is located on the first 1-3 OFDM symbols of the subframe, and the number of symbols occupied by the PDCCH in one scheduling subframe is indicated by CFI.
  • the larger the CFI the larger the number of symbols occupied by the PDCCH, and the subframe can be used for the allocated CCE.
  • the more resources, that is, the CFI determines the number of CCEs that the PDCCH of the first subframe of the first radio frame can be allocated. Therefore, the adjustment of the number of CCEs that can be allocated to the PDCCH of the first subframe of the first radio frame can be achieved by adjusting the size of the CFI.
  • Step 130 Compare the total number of CCEs required for transmitting the PDCCH in the first subframe of the first radio frame with the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame.
  • the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame is determined according to the value of the CFI, and then the total number of CCEs required for transmitting the PDCCH in the first subframe of the first radio frame is compared with The size relationship of the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame. If the total number of CCEs is greater than the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, step 140 is performed; if the total number of CCEs is smaller than the first number of the first radio frame.
  • the CFI is not adjusted.
  • Step 140 Increase CFI, and CFI satisfies 1 ⁇ CFI ⁇ 3, and CFI is an integer.
  • Step 150 Decrease CFI, and CFI satisfies 1 ⁇ CFI ⁇ 3, and CFI is an integer.
  • step 150 is not a necessary step for implementing the embodiment of the present invention.
  • Step 150 is only an optional solution of the embodiment of the present invention, and is further improved by the embodiment of the present invention.
  • the foregoing solution determines the current number according to the CCE usage record of the second radio frame before the current first radio frame and the number of CCEs allocated by the PDCCH for transmitting the common control information in the first subframe of the first radio frame.
  • the total number of CCEs required for transmitting the PDCCH in the first subframe of a radio frame and then according to the determined total number of CCEs required for transmitting the PDCCH in the first subframe of the first radio frame and the first
  • the CFI is dynamically adjusted according to the size relationship of the number of CCEs that can be allocated by the PDCCH of the first subframe of the radio frame, so that the number of CCEs of the first subframe of the first radio frame can satisfy the user's demand and not excessive, and the PDCCH is improved.
  • the above solution is different from the prior art method for determining the number of symbols occupied by the PDCCH.
  • the algorithm of the above method is simpler and the operation process is faster, thereby effectively reducing the operating pressure of the system and improving the efficiency of signal processing.
  • the problem that the symbol allocation of the PDCCH occupied by the PDCCH in the prior art is unreasonable and inaccurate is solved, and the performance of the LTE system is improved.
  • the method further includes: determining that the PDCCH assignable CCE number of the first subframe of the first radio frame corresponding to the reduced CFI value is not less than the first wireless The total number of CCEs required to transmit the PDCCH in the first subframe of the frame.
  • the K-th reduction CFI value (assumed to be q) corresponds to the number of assignable CCEs greater than the total number of CCEs required to transmit the PDCCH in the first subframe of the first radio frame
  • the number of assignable CCEs corresponding to the k+1th reduced CFI value (assumed to be q-1) is smaller than the total number of CCEs required for transmitting the PDCCH in the first subframe of the first radio frame.
  • the k+1th adjustment is not performed, and the KFI value (q) after the kth adjustment is taken as the final CFI value.
  • the CFI adjustment can be prevented from entering an infinite loop, and the method for determining the number of symbols occupied by the PDCCH is further improved, the accuracy of dynamically adjusting the CFI is improved, the resource utilization of the PDCCH is further improved, and the efficiency of signal processing is improved.
  • the method further includes:
  • Step 160 Determine that there is at least one second radio frame that satisfies the constraint condition, where the constraint condition is that the number of unsuccessfully scheduled users in the first subframe of the second radio frame is greater than a preset threshold.
  • step 140 is performed to increase the CFI only when the number of unsuccessfully scheduled users in the first subframe of the at least one second radio frame is greater than a preset threshold, and vice versa, if all the second wireless If the number of unsuccessfully scheduled users in the first subframe of the frame is not greater than the preset threshold, the CFI may not be adjusted, so as to avoid the CFI adjustment caused by the failure of a very small number of UEs to receive the PDCCH due to accidental factors. The risk of demand.
  • step 140 is not performed.
  • the method further includes:
  • Step 170 Determine that the number of unsuccessfully scheduled users in the first subframe of each of the at least one second radio frame is not greater than a preset threshold.
  • step 150 Performing step 150 if the number of unsuccessfully scheduled users in the first subframe of each of the at least one second radio frame is not greater than a preset threshold; if the at least one second If the number of unsuccessfully scheduled users in the first subframe of any radio frame in the radio frame is greater than a preset threshold, step 150 cannot be performed. In this way, the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame can be guaranteed to meet the requirements of all UEs.
  • the preset threshold 2 if the number of unsuccessfully scheduled users in the first subframe of at least one of the at least one second radio frame is greater than 2, step 150 is not performed.
  • the method for determining the number of symbols occupied by the PDCCH can be further improved, and the accuracy of dynamically adjusting the CFI is improved, so that the number of CCEs in the first subframe of the first radio frame can satisfy the user's needs without excessive, and further improve the PDCCH.
  • Resource utilization improve the efficiency of signal processing.
  • the method further includes:
  • the total number of CCEs is smaller than the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, further determining whether there is at least one first subframe of the radio frame in the at least one second radio frame The number of unsuccessfully scheduled users in the frame is greater than a preset threshold;
  • the preset threshold 3, if the total number of CCEs is smaller than the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, but there is one wireless in the at least one second radio frame. If the number of unsuccessfully scheduled users in the first subframe of the frame is greater than the preset threshold 3, the CFI is increased, and the CFI is satisfied: 1 ⁇ CFI ⁇ 3, and CFI is an integer.
  • the resource scheduling method can be further improved to ensure that the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame can meet the requirements of all UEs.
  • the method further includes:
  • Step 180 Determine that the total number of CCEs is less than a product of a number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame and a scale factor.
  • the scale factor is less than 1. If the total number of CCEs required for transmitting the PDCCH in the first subframe of the first radio frame is greater than or equal to the product of the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame and the scale factor, then Step 150 is not performed. Step 150 is performed only when the total number of CCEs is less than the product of the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame and the scale factor.
  • the number of CCEs that can be allocated is the product of the scale factor, so the operation of reducing the CFI is not performed.
  • steps 160, 170, and 180 are only three alternatives of the embodiments of the present invention, which are further improvements of the embodiments of the present invention, but are not essential steps for implementing the embodiments of the present invention, and the foregoing steps 160
  • the step 170 and the step 180 may be performed separately or in combination with each other, and the embodiment of the present invention is not specifically limited.
  • step 160 For example, one implementation manner in which step 160, step 170, and step 180 are combined with each other is:
  • step 130 After performing step 130, if the total number of CCEs is greater than the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, execute
  • Step 131 Increase CFI and satisfy: 1 ⁇ CFI ⁇ 3, and CFI is an integer.
  • step 132 is further performed: determining whether there is any unscheduled user in the at least one included first subframe The number of second radio frames that are greater than the preset threshold.
  • the CFI is increased and satisfies: 1 ⁇ CFI ⁇ 3, and CFI is an integer.
  • step 133 determines whether the total number of CCEs is smaller than the product of the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame and the scale factor.
  • the CFI is increased and satisfies: 1 ⁇ CFI ⁇ 3, and CFI is an integer.
  • the CFI adjustment can be prevented from entering an infinite loop, and the method for determining the number of symbols occupied by the PDCCH is further improved, and the accuracy of dynamically adjusting the CFI is improved, so that the number of CCEs of the first subframe of the first radio frame can satisfy the user's requirements. Not excessive, further improving the resource utilization of the PDCCH and improving the efficiency of signal processing.
  • the method further includes:
  • Step 190 Record the usage of the control channel unit CCE of the physical downlink control channel PDCCH for transmitting the user-specific information in the first subframe of the first radio frame, and save and save.
  • the usage case includes: the number of CCEs used by the user in the first subframe of the first radio frame, and the number of CCEs required by the user in the first subframe of the first radio frame, the first In the first subframe of the radio frame, the number of CCEs that are not available to the user to be scheduled is scheduled, the number of users that are not successfully scheduled in the first subframe of the first radio frame, and the like are not specifically limited in this embodiment of the present invention.
  • the base station records the control channel unit CCE usage of the physical downlink control channel PDCCH for transmitting the user-specific information in the subframe of each radio frame, so as to determine that the subframe for the next radio frame is used for transmitting the PDCCH.
  • the total number of required CCEs further improves the resource utilization and signal processing efficiency of the PDCCH.
  • the method before performing step 110, the method further includes: initializing a CFI value.
  • the values of the CFI and the related parameters are respectively set to an initial value.
  • the initial value of the CFI may be 1, or 2, or 3.
  • the number of CCEs used by the successfully scheduled users in the first subframe of the at least one second radio frame before the first radio frame is W1
  • the at least The number of CCEs required for the unscheduled user in the first subframe of the second radio frame is W2
  • the number of CCEs that are still missing in the first subframe of the first radio frame is W3.
  • the number of unscheduled users in the first subframe of the radio frame is W4
  • the number of CCEs allocated for the PDCCH for transmitting common control information in the first subframe of the first radio frame is W5.
  • W1, W2, W3, W4, and W5 are integers not less than 0. Since this part is well known to those skilled in the art, it will not be described here.
  • the foregoing resource scheduling method can be further improved, and the operation flow for determining the number of symbols occupied by the PDCCH in the resource scheduling process is simplified, thereby further reducing the operating pressure of the system and improving the efficiency of signal processing.
  • a second embodiment of the present invention provides a resource scheduling apparatus.
  • the apparatus includes:
  • the obtaining unit 210 is configured to obtain a control channel unit CCE usage record of a physical downlink control channel PDCCH for transmitting user-specific information in the first subframe of the at least one second radio frame before the current first radio frame;
  • the determining unit 220 is configured to determine, according to the CCE usage record and the number of CCEs allocated in the first subframe of the first radio frame that is a PDCCH for transmitting common control information, the first radio frame The total number of CCEs required for transmitting a PDCCH in one subframe;
  • the determining unit 230 is configured to compare the total number of the CCEs with the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame determined according to the control format indication CFI;
  • the adjusting unit 240 is configured to increase the CFI when the total number of CCEs is greater than the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, and the CFI satisfies 1 ⁇ CFI ⁇ 3, and the CFI is Integer.
  • the CCE usage record includes: the number of unsuccessfully scheduled users in the first subframe of each radio frame in the at least one second radio frame;
  • the determining unit 230 is further configured to: before the increasing the CFI, determining that there is at least one second radio frame that satisfies a constraint condition that is not successfully scheduled in the first subframe of the second radio frame The number of users is greater than a preset threshold.
  • the adjusting unit 240 is further configured to: after comparing the total number of the CCEs with the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, the total number of the CCEs When the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame is smaller, the CFI is decreased, and CFI satisfies 1 ⁇ CFI ⁇ 3, and CFI is an integer.
  • the determining unit 230 is further configured to: before the reducing the CFI value, determining that the total number of CCEs is less than a number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame.
  • the product of the scale factor which is less than one.
  • the CCE usage record includes: the number of unsuccessfully scheduled users in the first subframe of each radio frame in the at least one second radio frame;
  • the determining unit 230 is further configured to: before the reducing the CFI, determining that the number of unsuccessfully scheduled users in the first subframe of each radio frame in the at least one second radio frame is not greater than a preset threshold .
  • the CCE usage record includes: the number of unsuccessfully scheduled users in the first subframe of each radio frame in the at least one second radio frame;
  • the adjusting unit is further configured to: after comparing the total number of the CCEs with the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, the total number of the CCEs is smaller than the first number
  • the number of CCEs that can be allocated by the PDCCH of the first subframe of the radio frame, and the number of unsuccessfully scheduled users in the first subframe of at least one radio frame in the at least one second radio frame is greater than a preset threshold.
  • Increasing CFI, and CFI satisfies 1 ⁇ CFI ⁇ 3, and CFI is an integer.
  • the at least one second radio frame includes: a previous radio frame of the first radio frame; or
  • the first subframe of the at least two radio frames preceding the first radio frame is not successfully scheduled for the radio frame with the largest number of CCEs required by the user;
  • the first subframe of the at least two radio frames preceding the first radio frame schedules the radio frames with the largest number of CCEs that are still missing from all users to be scheduled.
  • the CCE usage record includes: scheduling, in a first subframe of the second radio frame, a number of CCEs used by the successfully scheduled user, and scheduling all to-be-scheduled in the first subframe of the second radio frame. The number of CCEs that the user still lacks;
  • the determining unit 220 is specifically configured to: schedule the number of CCEs used by the successfully scheduled users in the first subframe of the second radio frame, and schedule all users to be scheduled in the first subframe of the second radio frame. And a sum of the number of CCEs that are not available and the number of CCEs allocated by the PDCCH for transmitting common control information in the first subframe of the first radio frame, and determining the first subframe of the first radio frame The total number of CCEs required to transmit the PDCCH.
  • the device further includes: a recording unit, configured to record, and save the control channel unit CCE usage of the physical downlink control channel PDCCH for transmitting the user-specific information in the first subframe of the first radio frame.
  • a recording unit configured to record, and save the control channel unit CCE usage of the physical downlink control channel PDCCH for transmitting the user-specific information in the first subframe of the first radio frame.
  • a third embodiment of the present invention provides a resource scheduling device.
  • the device includes:
  • a memory 310 configured to store an instruction
  • a communication interface 320 configured to send a PDCCH to the UE
  • the processor 330 is connected to the memory 310 and the communication interface 320 for executing instructions in the memory 310 to execute the resource scheduling methods corresponding to the steps 110 to 190 in the process of executing the instructions.
  • the CCE usage record of the second radio frame before the current first radio frame and the CCE allocated by the PDCCH for transmitting the common control information in the first subframe of the first radio frame are used. And determining a total number of CCEs required for transmitting the PDCCH in the first subframe of the current first radio frame, and then determining, according to the determined CCE, the CCE required for transmitting the PDCCH in the first subframe of the first radio frame.
  • the CFI is dynamically adjusted according to the size relationship between the total number of CCEs and the number of CCEs that can be allocated by the PDCCH of the first subframe of the first radio frame, so that the number of CCEs of the first subframe of the first radio frame can meet the user's requirements without As for the excess, the resource utilization of the PDCCH is improved.
  • the algorithm used in the method for determining the number of symbols occupied by the PDCCH in the embodiment of the present invention is simpler, and the operation process is faster, which can effectively reduce the operating pressure of the system and improve the signal.
  • the problem that the symbol allocation of the PDCCH occupied by the PDCCH in the prior art is unreasonable and inaccurate is solved, and the performance of the LTE system is improved.
  • the embodiment of the present invention determines the number of CCEs allocated by the PDCCH for transmitting common control information according to the periodicity of scheduling of a part of the common channel and information by the system, according to the number of the current common channel and the aggregation level of the common channel PDCCH.
  • the algorithm is simplified, the operating pressure of the system is reduced, the accuracy of the symbol allocation of the PDCCH is further improved, and the performance of the LTE system is improved.
  • embodiments of the embodiments of the invention may be provided as a method, system, or computer program product.
  • embodiments of the invention may be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • embodiments of the invention may take the form of a computer program product embodied on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • Embodiments of the invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.

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Abstract

本发明实施例提供一种资源调度方法及装置，所述方法包括：获得当前的第一无线帧之前的至少一个第二无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用记录；根据该CCE使用记录以及该第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定该第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数；比较该CCE总个数与根据控制格式指示CFI所确定的该第一无线帧的第一子帧的PDCCH可分配的CCE个数；若该CCE总个数大于该第一无线帧的第一子帧的PDCCH可分配的CCE个数，则增大CFI，且CFI满足1≤CFI≤3，CFI为整数。

Description

一种资源调度方法及装置
本申请要求于2017年04月11日提交中国专利局、申请号为201710233951.7、发明名称为“一种资源调度方法及装置”的CN专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及移动通信领域，特别涉及一种资源调度方法及装置。
背景技术
在长期演进(Long Term Evolution，LTE)系统中，下行控制信道(Physical Downlink Control Channel，PDCCH)承载了下行控制信息(Downlink Control Information，DCI)，PDCCH中包含了一个或多个用户终端(User Equipment，UE)的资源分配信息。UE需要先解出PDCCH承载的DCI，才能正确解出与DCI对应的属于自己的物理下行共享信道(Physical Downlink Shared Channel，PDSCH)数据。
在资源结构上，一个PDCCH由n(n代表聚合等级)个连续的控制信道单元(Control Channel Element，CCE)构成，其中每个CCE由9个资源粒子组(Resource Element Group，REG)构成，1个REG由位于同一个正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号上的4个连续的资源粒子(Resource Element，RE)组成，PDCCH在一个子帧内占用的OFDM符号数是由控制格式指示(Control Format Indicator，CFI)指示的，CFI一般取值范围为{1，2，3}。PDCCH占用的符号数决定了子帧可用于分配的CCE的个数，而子帧可用于分配的CCE的个数对应着子帧能够调度的UE数量。
现有技术确定PDCCH占用的符号数的方式为：实时获取当前小区待调度的UE数量、载波带宽利用率、用户满意度等信息，然后根据上述信息确定当前子帧PDCCH占用的符号数。该方式需要进行更新实时UE数、计算关键业绩指标(Key Performance Indication，KPI)、跨载波获取其它载波的UE信息 等复杂过程，导致系统运行压力大、信号处理效率低，时常出现PDCCH占用的符号数分配不合理、不准确的情况，进而导致LTE系统性能降低。
发明内容
本发明实施例提供一种资源调度方法及装置，用于解决现有技术中PDCCH占用的符号数分配不合理、不准确，进而导致LTE系统性能降低的技术问题。
本发明实施例第一方面提供一种资源调度方法，包括：
获得当前的第一无线帧之前的至少一个第二无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用记录；所述第二无线帧的第一子帧为所述第二无线帧中的任一子帧；
根据所述CCE使用记录以及所述第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数；
比较所述CCE总个数与根据控制格式指示CFI所确定的所述第一无线帧的第一子帧的PDCCH可分配的CCE个数；
若所述CCE总个数大于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
上述方案根据当前的第一无线帧之前的第二无线帧的CCE使用记录以及第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定当前的第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数，然后根据确定出的第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数和第一无线帧的第一子帧的PDCCH可分配的CCE个数的大小关系对CFI进行动态调整，使得第一无线帧的第一子帧的CCE数量既能够满足用户需求又不至于过量，提高了PDCCH的资源利用率；同时，上述方案不同于现有技术确定PDCCH占用的符号数的方式，上述方法的算法更加简单，操作过程更加快捷，因而能够有效降低系统的运行压力、提高信号处理的效率。
可选的，在所述减小当前CFI值之前，所述方法还包括：确定减小后的CFI值对应的第一无线帧的第一子帧的PDCCH可分配的CCE个数不小于所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数。
可选的，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；在所述增大CFI之前，所述方法还包括：确定存在至少一个满足约束条件的第二无线帧，所述约束条件为所述第二无线帧的第一子帧中未成功调度用户的个数大于预设阈值。通过本方式，能够进一步提高PDCCH的资源利用率，同时降低系统的运行压力、提高信号处理的效率。
可选的，在比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，所述方法还包括：若所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则减小CFI，且CFI满足1≤CFI≤3，CFI为整数。通过本方式，能够进一步完善上述资源调度方法，进一步提高PDCCH的资源利用率，同时降低系统的运行压力、提高信号处理的效率。
可选的，在所述减小当前CFI值之前，所述方法还包括：确定所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数与比例因子的乘积，所述比例因子小于1。通过本方式，能够进一步完善上述资源调度方法，进一步提高PDCCH的资源利用率，同时降低系统的运行压力、提高信号处理的效率。
可选的，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；在所述减小CFI之前，所述方法还包括：确定所述至少一个第二无线帧中的每个无线帧的第一子帧中未成功调度用户的个数不大于预设阈值。通过本方式，能够进一步完善上述资源调度方法，进一步提高PDCCH的资源利用率，同时降低系统的运行压力、提高信号处理的效率。
可选的，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；在比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，所述方法还包括：若所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则进一步判断所述至少一个第二无线帧中是否至少存在一个无线帧的第一子帧中未成功调度用户的个数大于预设阈值；若为是，则增大CFI，且CFI满足1≤CFI≤3，CFI为整数。通过本方式，能够进一步完善资源调度方法，保证第一无线帧的第一子帧的PDCCH可分配的CCE个数能够满足所有UE的需求。
可选的，所述至少一个第二无线帧包括：所述第一无线帧的上一个无线帧；或所述第一无线帧之前的至少两个无线帧的第一子帧中未成功调度用户所需的CCE个数最多的无线帧；或所述第一无线帧之前的至少两个无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数最多的无线帧。通过本方式，能够进一步完善上述资源调度方法，进一步提高PDCCH的资源利用率，同时降低系统的运行压力、提高信号处理的效率。
可选的，所述CCE使用记录包括：所述第二无线帧的第一子帧中被成功调度用户所使用的CCE个数和所述第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数；所述确定所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数，具体为：确定所述第二无线帧的第一子帧中被成功调度用户所使用的CCE个数、所述第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数以及所述第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数的和值，将确定的所述和值作为所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数。通过本方式，能够进一步完善上述资源调度方法，进一步提高PDCCH的资源利用率，同时降低系统的运行压力、提高信号处理的效率。
可选的，在增大CFI或者减小CFI之后，所述方法还包括：记录第一无 线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用情况，并进行保存。通过本方式，能够进一步完善上述资源调度方法，进一步提高PDCCH的资源利用率，同时降低系统的运行压力、提高信号处理的效率。
可选的，在所述的获得当前的第一无线帧之前的至少一个第二无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用记录之前，所述方法还包括：初始化CFI值。通过本方式，能够进一步完善上述资源调度方法，进一步提高PDCCH的资源利用率，同时降低系统的运行压力、提高信号处理的效率。
本发明实施例第二方面提供一种资源调度装置，包括：获得单元，用于获得当前的第一无线帧之前的至少一个第二无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用记录；所述第二无线帧的第一子帧为所述第二无线帧中的任一子帧；确定单元，用于根据所述CCE使用记录以及所述第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数；判断单元，用于比较所述CCE总个数与根据控制格式指示CFI所确定的所述第一无线帧的第一子帧的PDCCH可分配的CCE个数；调整单元，用于在所述CCE总个数大于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数时，增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
可选的，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；所述判断单元还用于：在所述增大CFI之前，确定存在至少一个满足约束条件的第二无线帧，所述约束条件为所述第二无线帧的第一子帧中未成功调度用户的个数大于预设阈值。
可选的，所述调整单元还用于：在比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，在所述CCE总个数小于所 述第一无线帧的第一子帧的PDCCH可分配的CCE个数时，减小CFI，且CFI满足1≤CFI≤3，CFI为整数。
可选的，所述判断单元还用于：在所述减小CFI值之前，确定所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数与比例因子的乘积，所述比例因子小于1。
可选的，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；所述判断单元还用于：在所述减小CFI之前，确定所述至少一个第二无线帧中的每个无线帧的第一子帧中未成功调度用户的个数不大于预设阈值。
可选的，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；所述调整单元还用于：在比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，在所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，且所述至少一个第二无线帧中存在至少一个无线帧的第一子帧中未成功调度用户的个数大于预设阈值时，增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
可选的，所述至少一个第二无线帧包括：所述第一无线帧的上一个无线帧；或所述第一无线帧之前的至少两个无线帧的第一子帧中未成功调度用户所需的CCE个数最多的无线帧；或所述第一无线帧之前的至少两个无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数最多的无线帧。
可选的，所述CCE使用记录包括：所述第二无线帧的第一子帧中被成功调度用户所使用的CCE个数和所述第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数；所述确定单元具体用于：确定所述第二无线帧的第一子帧中被成功调度用户所使用的CCE个数、所述第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数以及所述第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数的和值，将确定的所述和值 作为所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数。
可选的，所述装置还包括：记录单元，用于记录第一无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用情况，并进行保存。
本发明实施例第三方面提供一种资源调度设备，包括：存储器，用于存储指令；通信接口，用于向UE发送PDCCH；处理器，分别与存储器与通信接口连接，用于执行存储器中的指令，以在执行指令的过程中，执行本发明实施例第一方面对应的资源调度方法。
本发明实施例中提供的一个或多个技术方案，至少具有如下技术效果或优点：
1、本发明实施例中，根据当前的第一无线帧之前的第二无线帧的CCE使用记录以及第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定当前的第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数，然后根据确定出的第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数和第一无线帧的第一子帧的PDCCH可分配的CCE个数的大小关系对CFI进行动态调整，使得第一无线帧的第一子帧的CCE数量既能够满足用户需求又不至于过量，提高了PDCCH的资源利用率。而且，不同于现有技术确定PDCCH占用的符号数的方式，本发明实施例确定PDCCH占用的符号数的方法所采用的算法更加简单，操作过程更加快捷，能够有效降低系统的运行压力、提高信号处理的效率。解决了现有技术中PDCCH占用的符号数分配不合理、不准确的问题，改善了LTE系统性能。
2、本发明实施例利用系统对一部分公共信道和信息的调度的周期性，根据当前公共信道的个数以及公共信道PDCCH的聚合等级确定用于发送公共控制信息的PDCCH所分配的CCE个数，简化了算法、降低了系统的运行压力，进一步提高了PDCCH占用的符号数分配的准确性，改善了LTE系统性能。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，显而易见地，下面描述中的附图仅仅是本发明实施例的一些实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例中资源调度方法的流程示意图；
图2为本发明实施例中第一无线帧与第二无线帧的结构示意图；
图3为本发明实施例中资源调度装置的结构示意图；
图4为本发明实施例中资源调度设备的结构示意图。
具体实施方式
下面通过附图以及具体实施例对本发明实施例技术方案做详细的说明，应当理解本发明实施例以及实施例中的具体特征是对本发明实施例技术方案的详细的说明，而不是对本发明实施例技术方案的限定，在不冲突的情况下，本发明实施例以及实施例中的技术特征可以相互组合。
实施例一
本发明实施例一提供一种资源调度方法，应用于LTE系统。在本发明实施例中，执行资源调度方法的主体为基站，参照图1，所述方法具体包括以下步骤：
步骤110：获得当前的第一无线帧之前的至少一个第二无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用记录。
所述第二无线帧时刻早于所述第一无线帧时刻，所述第二无线帧的所述第一子帧可以为所述第二无线帧所包含的0～9号子帧中的任一子帧，第一无线帧的第一子帧的编号与第二无线帧的第一子帧的编号相互对应。
根据当前的第一无线帧的第一子帧的编号查询并获得第二无线帧的第一子帧。参照图2，如果当前的第一无线帧的第一子帧的位置编号为1，则第二 无线帧的第一子帧在第二无线帧中的位置编号也对应为1；如果当前的第一无线帧的第一子帧的位置编号为2，则第二无线帧的第一子帧的位置编号也对应为2，以此类推。本部分为本领域技术人员所熟知的内容，所以在此不再详述。
第二无线帧的个数可以为一个，也可以为多个，本发明实施例对第二无线帧的数量不做具体限制。其中第二无线帧的个数为一个时的情况包括：至少一个第二无线帧为第一无线帧的上一个无线帧，至少一个第二无线帧为第一无线帧之前的至少两个无线帧的第一子帧中未成功调度用户所需的CCE个数最多的无线帧，至少一个第二无线帧为第一无线帧之前的至少两个无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数最多的无线帧，等等。
至少一个第二无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用记录包括：至少一个第二无线帧中每一个无线帧的第一子帧中被成功调度用户所使用的CCE个数，至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户所需的CCE个数，至少一个第二无线帧中每一个无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数，至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数，等等，本发明实施例不做具体限制。
步骤120：根据所述CCE使用记录以及所述第一无线帧的所述第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定所述第一无线帧的所述第一子帧中用于发送PDCCH所需的CCE总个数。
其中，步骤120可以包括：步骤121、步骤122以及步骤123。
步骤121：确定当前的第一无线帧的所述第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数。
根据第二无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用记录，确定当前的第一无线帧的所述第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数。其中，第二无线帧的数量不同，确定当前的第一无线帧的第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数的方法不同。
当第二无线帧的数量为一个时，第一无线帧的第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数为：
NCCE est＝NCCE fail+NCCE spec；
其中，NCCE spec为第二无线帧的第一子帧中被成功调度用户所使用的CCE个数；NCCE fail为第二无线帧的第一子帧中未成功调度用户所需的CCE个数或第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数，第二无线帧的第一子帧中未成功调度用户所需的CCE个数与第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数可以相同，也可以不同。
例如，根据第二无线帧的第一子帧中未成功调度用户所需的CCE个数和第二无线帧的第一子帧中未成功调度用户所需的CCE个数确定当前的第一无线帧的所述第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数：第二无线帧的第一子帧中未成功调度用户所需的CCE个数为12，第二无线帧的第一子帧中被成功调度用户所使用的CCE个数为36，则第一无线帧的所述第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数为12+36＝48。
例如，根据第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数和第二无线帧的第一子帧中未成功调度用户所需的CCE个数确定当前的第一无线帧的所述第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数：第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数为8，第二无线帧的第一子帧中被成功调度用户所使用的CCE个数为36，则第一无线帧的所述第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数为8+36＝44。
当第二无线帧的数量大于一个时，第一无线帧的第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数为：
Figure PCTCN2017117272-appb-000001
其中，
Figure PCTCN2017117272-appb-000002
为第二无线帧的第一子帧中未成功调度用户所需的CCE个数(或第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数)的平均值，
Figure PCTCN2017117272-appb-000003
为第二无线帧的第一子帧中被成功调度用户所使用的CCE个数的平均值。
例如，所述至少一个第二无线帧包括第一无线帧之前第三无线帧和第四无线帧，其中第三无线帧的第一子帧中未成功调度用户所需的CCE个数为12，第四无线帧的第一子帧中未成功调度用户所需的CCE个数为20，第三无线帧的第一子帧中被成功调度用户所使用的CCE个数为32，第四无线帧的第一子帧中被成功调度用户所使用的CCE个数为24，则第一无线帧的所述第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数为：[(12+20)/2]+[(32+24)/2]＝44。
步骤122：确定当前的第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数。
第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数由第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH的聚合等级以及第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH的个数所确定。例如，第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH的个数为2，第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH的聚合等级为8，则可确定第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数为2*8＝16。
由于系统对一部分公共信道和信息的调度具有周期性，因此在某些子帧 内需要发送用于发送公共控制信息的PDCCH，在某些子帧内则不需要发送用于发送公共控制信息的PDCCH。为了使得所有子帧都能够满足发送公共控制信息的PDCCH的需求，在本发明实施例中，确定用于发送公共控制信息的PDCCH所分配的CCE个数的方法，还可以为：根据当前公共信道的个数以及公共信道PDCCH的聚合等级确定用于发送公共控制信息的PDCCH所分配的CCE个数。例如，当前公共信道的个数为1，公共信道上的PDCCH的聚合等级8，则可确定用于发送公共控制信息的PDCCH所分配的CCE个数为1*8＝8。
步骤123：确定第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数。
第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数等于第一无线帧的所述第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数与当前所述第一无线帧的所述第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数的和。例如，第一无线帧的第一子帧中为用于发送用户专属信息的PDCCH所需要的CCE个数为44，第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数为8，则可确定第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数为44+8＝52。
需要说明的是，步骤121可以在步骤122之前执行，也可以在步骤122之后执行，还可以同时执行，本发明实施例对步骤121和步骤122的顺序不做具体限制。
PDCCH位于子帧的前1～3个OFDM符号上，PDCCH在一个调度子帧内占用的符号个数由CFI指示，CFI越大，PDCCH占用的符号数越多，子帧可用于分配的CCE的资源就越多，即CFI决定了所述第一无线帧的第一子帧的PDCCH可分配的CCE个数。因此可以通过调整CFI的大小以实现对第一无线帧的第一子帧的PDCCH可分配的CCE个数的调整。
步骤130：比较第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数与第一无线帧的第一子帧的PDCCH可分配的CCE个数。
具体的，根据CFI的值确定第一无线帧的第一子帧的PDCCH可分配的CCE个数，然后比较第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数与第一无线帧的第一子帧的PDCCH可分配的CCE个数的大小关系。若所述CCE总个数大于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则执行步骤140；若所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则执行步骤150；若所述CCE总个数等于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则不调整CFI。
步骤140：增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
例如，第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数为30，当前CFI＝1，对应的第一无线帧的第一子帧的PDCCH可分配的CCE个数为N1，且30>N1，因此需要增大CFI，直到满足CCE总个数不大于第一无线帧的第一子帧的PDCCH可分配的CCE个数为止，且满足：1≤CFI≤3，CFI为整数。
步骤150：减小CFI，且CFI满足1≤CFI≤3，CFI为整数。
例如，第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数为60，当前CFI＝3，对应的第一无线帧的第一子帧的PDCCH可分配的CCE个数为N2，且60<N2，因此需要减小CFI，直到满足CCE总个数不小于第一无线帧的第一子帧的PDCCH可分配的CCE个数为止，且CFI满足：1≤CFI≤3，CFI为整数。
需要说明的是上述步骤150不是实现本发明实施例的必须步骤，步骤150只是作为本发明实施例一种可选的方案，是对本发明实施例的进一步完善。
上述方案根据当前的第一无线帧之前的第二无线帧的CCE使用记录以及第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定当前的第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数，然后根据确定出的第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数和第一无线帧的第一子帧的PDCCH可分配的CCE个数的大小关 系对CFI进行动态调整，使得第一无线帧的第一子帧的CCE数量既能够满足用户需求又不至于过量，提高了PDCCH的资源利用率；同时，上述方案不同于现有技术确定PDCCH占用的符号数的方式，上述方法的算法更加简单，操作过程更加快捷，因而能够有效降低系统的运行压力、提高信号处理的效率。解决了现有技术中PDCCH占用的符号数分配不合理、不准确的问题，改善了LTE系统性能。
可选的，在执行上述步骤150之前，所述方法还包括：确定减小后的CFI值对应的第一无线帧的第一子帧的PDCCH可分配的CCE个数不小于所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数。
例如，第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数为30，当前CFI＝3，对应的第一无线帧的第一子帧的PDCCH可分配的CCE个数为N4，且30<N4，因此需要减小CFI。但如果第k次减小后的CFI值(假设为q)所对应的可分配的CCE数量大于所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数，而第k+1次减小后的CFI值(假设为q-1)所对应的可分配的CCE数量却小于所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数，则不做第k+1次调整，将第k次调整后的CFI值(q)作为最终的CFI值。
通过本方式，能够避免CFI调整进入死循环，进一步完善确定PDCCH占用的符号数的方法，提高动态调整CFI的精准度，进一步提高PDCCH的资源利用率，提高信号处理的效率。
可选的，在执行步骤130之后、步骤140之前，所述方法还包括：
步骤160：确定存在至少一个满足约束条件的第二无线帧，所述约束条件为所述第二无线帧的第一子帧中未成功调度用户的个数大于预设阈值。
所述预设阈值为较小整数，例如为1，2，3等，本发明实施例不做具体限制。上述技术方案中，只有在存在至少一个所述第二无线帧的第一子帧中未成功调度用户的个数大于预设阈值时才执行步骤140，增大CFI；反之，如果所有第二无线帧的第一子帧中未成功调度用户的个数均不大于预设阈值， 则可以不调整CFI，以此规避因为偶然因素导致的极少数UE接收PDCCH失败进而导致的CFI调整不符合UE实际需求的风险。
例如，预设阈值＝1，如果第二无线帧的第一子帧中未成功调度用户的个数为1或者0，则不执行步骤140。
可选的，在执行步骤130之后、步骤150之前，所述方法还包括：
步骤170：确定所述至少一个第二无线帧中的每个无线帧的第一子帧中未成功调度用户的个数不大于预设阈值。
只有在所述至少一个第二无线帧中的每个无线帧的第一子帧中未成功调度用户的个数不大于预设阈值的情况下，才执行步骤150；如果所述至少一个第二无线帧中存在任一无线帧的第一子帧中未成功调度用户的个数大于预设阈值，则无法执行步骤150。以此保证第一无线帧的第一子帧的PDCCH可分配的CCE个数能够满足所有UE的需求。
例如，预设阈值＝2，如果至少一个第二无线帧中的至少一个无线帧的第一子帧中未成功调度用户的个数大于2，则不执行步骤150。
通过本方式，能够进一步完善确定PDCCH占用的符号数的方法，提高动态调整CFI的精准度，使得第一无线帧的第一子帧的CCE数量既能够满足用户需求又不至于过量，进一步提高PDCCH的资源利用率，提高信号处理的效率。
可选的，在执行步骤130所述的比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，所述方法还包括：
若所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则进一步判断所述至少一个第二无线帧中是否至少存在一个无线帧的第一子帧中未成功调度用户的个数大于预设阈值；
若为是，则增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
例如，预设阈值＝3，如果所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，但是所述至少一个第二无线帧中存在1个 无线帧的第一子帧中未成功调度用户的个数大于预设阈值3，则增大CFI，且CFI满足：1≤CFI≤3，CFI为整数。
通过本方式，能够进一步完善上述资源调度方法，保证第一无线帧的第一子帧的PDCCH可分配的CCE个数能够满足所有UE的需求。
可选的，在执行步骤150之前，所述方法还包括：
步骤180：确定所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数与比例因子的乘积。
其中，比例因子小于1。如果第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数大于或者等于第一无线帧的第一子帧的PDCCH可分配的CCE个数与比例因子的乘积时，则不执行步骤150。只有在CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数与比例因子的乘积时才执行步骤150。以此保证第一无线帧的第一子帧的PDCCH可分配的CCE个数能够较为宽裕，避免由于偶然接入UE导致第一无线帧的第一子帧的PDCCH可分配的CCE个数不足的风险，以及避免CFI调整进入死循环。
例如，确定出的第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数为100，第一无线帧的第一子帧的PDCCH可分配的CCE个数为N3＝88，比例因子为0.9，由于100>N3*0.9＝79.2，不满足第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数小于第一无线帧的第一子帧的PDCCH可分配的CCE个数与比例因子的乘积，因此不执行减小CFI的操作。
需要说明的是，步骤160、步骤170和步骤180只是本发明实施例可选的三种方案，是对本发明实施例的进一步完善，但并不是实现本发明实施例的必须步骤，并且上述步骤160、步骤170和步骤180可分别单独执行，也可以相互结合执行，本发明实施例不做具体限制。
例如，步骤160、步骤170和步骤180相互结合的一种可实现方式为：
在执行步骤130之后，若所述CCE总个数大于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则执行
步骤131：增大CFI，且满足：1≤CFI≤3，CFI为整数。
若所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则进一步执行步骤132：判断是否存在至少一个包括的第一子帧中未成功调度用户的个数大于所述预设阈值的第二无线帧。
若为是，则增大CFI，且满足：1≤CFI≤3，CFI为整数。
若为否，则进一步执行步骤133：判断所述CCE总个数是否小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数与比例因子的乘积
若为是，则增大CFI，且满足：1≤CFI≤3，CFI为整数。
通过本方式，能够避免CFI调整进入死循环，进一步完善确定PDCCH占用的符号数的方法，提高动态调整CFI的精准度，使得第一无线帧的第一子帧的CCE数量既能够满足用户需求又不至于过量，进一步提高PDCCH的资源利用率，提高信号处理的效率。
可选的，在上述步骤140或步骤150对CFI进行调整之后，所述方法还包括：
步骤190：记录第一无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用情况，并进行保存。
所述使用情况包括：第一无线帧的第一子帧中被成功调度用户所使用的CCE个数，第一无线帧的第一子帧中未成功调度用户所需的CCE个数，第一无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数，第一无线帧的第一子帧中未成功调度用户的个数，等等，本发明实施例不做具体限制。
在本方式中，基站记录每一无线帧的子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用情况，以便于确定下一无线帧的子帧中用于发送PDCCH所需的CCE总个数，进一步提高PDCCH的资源利用率和信号处理效率。
可选的，在执行步骤110之前，所述方法还包括：初始化CFI值。
具体的，如果当前的第一无线帧之前没有用于传输用户专属信息的物理 下行控制信道PDCCH的控制信道单元CCE使用记录，则将CFI以及相关参数的值分别设定一个初始值。
例如，CFI的初始值可以为1，或2，或3，第一无线帧之前的至少一个第二无线帧的第一子帧中被成功调度用户所使用的CCE个数为W1，所述至少一个第二无线帧的第一子帧中未成功调度用户所需的CCE个数为W2，第一无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数为W3，第一无线帧的第一子帧中未成功调度用户的个数为W4，第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数为W5。其中，W1、W2、W3、W4、W5均为不小于0的整数。由于该部分为本领域技术人员所熟知的内容，所以此处不再进行赘述。
通过本方式，能够进一步完善上述资源调度方法，简化资源调度过程中确定PDCCH占用的符号数的操作流程，进一步降低系统的运行压力、提高信号处理的效率。
实施例二
本发明实施例二提供一种资源调度装置，参照图3，所述装置包括：
获得单元210，用于获得当前的第一无线帧之前的至少一个第二无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用记录；
确定单元220，用于根据所述CCE使用记录以及所述第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数；
判断单元230，用于比较所述CCE总个数与根据控制格式指示CFI所确定的所述第一无线帧的第一子帧的PDCCH可分配的CCE个数；
调整单元240，用于在所述CCE总个数大于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数时，增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
可选的，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；
所述判断单元230还用于：在所述增大CFI之前，确定存在至少一个满足约束条件的第二无线帧，所述约束条件为所述第二无线帧的第一子帧中未成功调度用户的个数大于预设阈值。
可选的，所述调整单元240还用于：在比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，在所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数时，减小CFI，且CFI满足1≤CFI≤3，CFI为整数。
可选的，所述判断单元230还用于：在所述减小CFI值之前，确定所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数与比例因子的乘积，所述比例因子小于1。
可选的，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；
所述判断单元230还用于：在所述减小CFI之前，确定所述至少一个第二无线帧中的每个无线帧的第一子帧中未成功调度用户的个数不大于预设阈值。
可选的，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；
所述调整单元还用于：在比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，在所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，且所述至少一个第二无线帧中至少存在一个无线帧的第一子帧中未成功调度用户的个数大于预设阈值时，增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
可选的，所述至少一个第二无线帧包括：所述第一无线帧的上一个无线帧；或
所述第一无线帧之前的至少两个无线帧的第一子帧中未成功调度用户所需的CCE个数最多的无线帧；或
所述第一无线帧之前的至少两个无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数最多的无线帧。
可选的，所述CCE使用记录包括：所述第二无线帧的第一子帧中被成功调度用户所使用的CCE个数和所述第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数；
所述确定单元220具体用于：将所述第二无线帧的第一子帧中被成功调度用户所使用的CCE个数、所述第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数以及所述第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数的和，确定为所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数。
可选的，所述装置还包括：记录单元，用于记录第一无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用情况，并进行保存。
本发明实施例二包含的各个单元所执行操作的具体实现方式可以参照本发明实施例一中由基站执行的对应步骤，本发明实施例不再赘述。
实施例三
本发明实施例三提供一种资源调度设备，参照图4，所述设备包括：
存储器310，用于存储指令；
通信接口320，用于向UE发送PDCCH；
处理器330，分别与存储器310与通信接口320连接，用于执行存储器310中的指令，以在执行指令的过程中，执行步骤110至190对应的资源调度方法。
本发明实施例中提供的一个或多个技术方案，至少具有如下技术效果或优点：
1、本发明实施例中，根据当前的第一无线帧之前的第二无线帧的CCE 使用记录以及第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定当前的第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数，然后根据确定出的第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数和第一无线帧的第一子帧的PDCCH可分配的CCE个数的大小关系对CFI进行动态调整，使得第一无线帧的第一子帧的CCE数量既能够满足用户需求又不至于过量，提高了PDCCH的资源利用率。而且，不同于现有技术确定PDCCH占用的符号数的方式，本发明实施例确定PDCCH占用的符号数的方法所采用的算法更加简单，操作过程更加快捷，能够有效降低系统的运行压力、提高信号处理的效率。解决了现有技术中PDCCH占用的符号数分配不合理、不准确的问题，改善了LTE系统性能。
2、本发明实施例利用系统对一部分公共信道和信息的调度的周期性，根据当前公共信道的个数以及公共信道PDCCH的聚合等级确定用于发送公共控制信息的PDCCH所分配的CCE个数，简化了算法、降低了系统的运行压力，进一步提高了PDCCH占用的符号数分配的准确性，改善了LTE系统性能。
本领域内的技术人员应明白，本发明实施例的实施例可提供为方法、系统、或计算机程序产品。因此，本发明实施例可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明实施例可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明实施例是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实 现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明实施例权利要求及其等同技术的范围之内，则本发明实施例也意图包含这些改动和变型在内。

Claims (16)

  1. 一种资源调度方法，其特征在于，包括：
    获得当前的第一无线帧之前的至少一个第二无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用记录；所述第二无线帧的第一子帧为所述第二无线帧中的任一子帧；
    根据所述CCE使用记录以及所述第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数；
    比较所述CCE总个数与根据控制格式指示CFI所确定的所述第一无线帧的第一子帧的PDCCH可分配的CCE个数；
    若所述CCE总个数大于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
  2. 如权利要求1所述的方法，其特征在于，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；
    在所述增大CFI之前，所述方法还包括：
    确定存在至少一个满足约束条件的第二无线帧，所述约束条件为所述第二无线帧的第一子帧中未成功调度用户的个数大于预设阈值。
  3. 如权利要求1所述的方法，其特征在于，在比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，所述方法还包括：
    若所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则减小CFI，且CFI满足1≤CFI≤3，CFI为整数。
  4. 如权利要求3所述的方法，其特征在于，在所述减小当前CFI值之前，所述方法还包括：
    确定所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配 的CCE个数与比例因子的乘积，所述比例因子小于1。
  5. 如权利要求3所述的方法，其特征在于，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；
    在所述减小CFI之前，所述方法还包括：
    确定所述至少一个第二无线帧中的每个无线帧的第一子帧中未成功调度用户的个数不大于预设阈值。
  6. 如权利要求1所述的方法，其特征在于，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；
    在比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，所述方法还包括：
    若所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，则进一步判断所述至少一个第二无线帧中是否至少存在一个无线帧的第一子帧中未成功调度用户的个数大于预设阈值；
    若为是，则增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
  7. 如权利要求1-6任一项所述的方法，其特征在于，所述至少一个第二无线帧包括：
    所述第一无线帧的上一个无线帧；或
    所述第一无线帧之前的至少两个无线帧的第一子帧中未成功调度用户所需的CCE个数最多的无线帧；或
    所述第一无线帧之前的至少两个无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数最多的无线帧。
  8. 如权利要求7所述的方法，其特征在于，所述CCE使用记录包括：所述第二无线帧的第一子帧中被成功调度用户所使用的CCE个数和所述第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数；
    所述确定所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数，具体为：
    确定所述第二无线帧的第一子帧中被成功调度用户所使用的CCE个数、所述第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数以及所述第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数的和值，将确定的所述和值作为所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数。
  9. 一种资源调度装置，其特征在于，包括：
    获得单元，用于获得当前的第一无线帧之前的至少一个第二无线帧的第一子帧中用于传输用户专属信息的物理下行控制信道PDCCH的控制信道单元CCE使用记录；所述第二无线帧的第一子帧为所述第二无线帧中的任一子帧；
    确定单元，用于根据所述CCE使用记录以及所述第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数，确定所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数；
    判断单元，用于比较所述CCE总个数与根据控制格式指示CFI所确定的所述第一无线帧的第一子帧的PDCCH可分配的CCE个数；
    调整单元，用于在所述CCE总个数大于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数时，增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
  10. 如权利要求9所述的装置，其特征在于，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；
    所述判断单元还用于：在所述增大CFI之前，确定存在至少一个满足约束条件的第二无线帧，所述约束条件为所述第二无线帧的第一子帧中未成功调度用户的个数大于预设阈值。
  11. 如权利要求9所述的装置，其特征在于，所述调整单元还用于：在比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，在所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数时，减小CFI，且CFI满足1≤CFI≤3，CFI为整数。
  12. 如权利要求11所述的装置，其特征在于，所述判断单元还用于：在所述减小CFI值之前，确定所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数与比例因子的乘积，所述比例因子小于1。
  13. 如权利要求11所述的装置，其特征在于，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；
    所述判断单元还用于：在所述减小CFI之前，确定所述至少一个第二无线帧中的每个无线帧的第一子帧中未成功调度用户的个数不大于预设阈值。
  14. 如权利要求9所述的装置，其特征在于，所述CCE使用记录包括：所述至少一个第二无线帧中每一个无线帧的第一子帧中未成功调度用户的个数；
    所述调整单元还用于：在比较所述CCE总个数与所述第一无线帧的第一子帧的PDCCH可分配的CCE个数之后，在所述CCE总个数小于所述第一无线帧的第一子帧的PDCCH可分配的CCE个数，且所述至少一个第二无线帧中至少存在一个无线帧的第一子帧中未成功调度用户的个数大于预设阈值时，增大CFI，且CFI满足1≤CFI≤3，CFI为整数。
  15. 如权利要求9-14任一项所述的装置，其特征在于，所述至少一个第二无线帧包括：
    所述第一无线帧的上一个无线帧；或
    所述第一无线帧之前的至少两个无线帧的第一子帧中未成功调度用户所需的CCE个数最多的无线帧；或
    所述第一无线帧之前的至少两个无线帧的第一子帧中调度所有待调度用 户尚缺的CCE个数最多的无线帧。
  16. 如权利要求15所述的装置，其特征在于，所述CCE使用记录包括：所述第二无线帧的第一子帧中被成功调度用户所使用的CCE个数和所述第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数；
    所述确定单元具体用于：确定所述第二无线帧的第一子帧中被成功调度用户所使用的CCE个数、所述第二无线帧的第一子帧中调度所有待调度用户尚缺的CCE个数以及所述第一无线帧的第一子帧中为用于发送公共控制信息的PDCCH所分配的CCE个数的和值，将确定的所述和值作为所述第一无线帧的第一子帧中用于发送PDCCH所需的CCE总个数。
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