CN108934072B - Control channel resource allocation method and device - Google Patents

Control channel resource allocation method and device Download PDF

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CN108934072B
CN108934072B CN201710381196.7A CN201710381196A CN108934072B CN 108934072 B CN108934072 B CN 108934072B CN 201710381196 A CN201710381196 A CN 201710381196A CN 108934072 B CN108934072 B CN 108934072B
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current
terminal
resource
epdcch
allowance
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CN108934072A (en
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孙宇
姚春峰
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference

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  • Mobile Radio Communication Systems (AREA)

Abstract

The invention relates to a control channel resource allocation method, which comprises the following steps: detecting whether a first terminal which is not configured with an Enhanced Physical Downlink Control Channel (EPDCCH) resource exists in a first type terminal, wherein the first type terminal is a terminal with interference intensity exceeding a preset interference threshold; when detecting that a first terminal which is not configured with the EPDCCH resources exists in the first type of terminal, acquiring the current EPDCCH resource allowance, and detecting whether the current EPDCCH resource allowance is larger than a preset EPDCCH resource allowance threshold value or not; if yes, the EPDCCH resource is configured for the first terminal, and the current EPDCCH resource allowance and the current PDCCH resource allowance are updated. According to the terminal type and the EPDCCH resource allowance, the downlink control channel resource is reasonably configured under the condition that the EPDCCH resource allowance is sufficient, the EPDCCH resource is configured for the first type terminal as much as possible, the anti-interference capability of the terminal is improved, and the utilization rate and the throughput of the system resource are improved. A control channel resource allocation apparatus is also provided.

Description

Control channel resource allocation method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for configuring control channel resources.
Background
With the development of mobile communication technology, in order to realize the full coverage of LTE (Long Term Evolution ) network, macro-micro heterogeneous networks formed by macro-micro base stations are adopted to complete the coverage of each base station cell. In the conventional technology, a base station configures PDCCH (Physical Downlink Control Channel ) resources for UEs (User Equipment) in a cell to send a downlink control signal, but in a macro-micro heterogeneous network scenario, although full coverage to an LTE network is achieved, UEs (User Equipment) located at the edge of a micro base station are easily interfered, and the performance of the physical downlink control channel is low. And the EPDCCH (Enhanced Physical Downlink Control Channel ) uses the DMRS (Demodulation Reference Signal, demodulation reference signal) for demodulation, supports transmission technologies based on the DMRS such as beam forming and the like, can improve the demodulation performance of the control channel, and can reduce the adjacent cell interference through certain interference avoidance technologies.
However, since EPDCCH resources are limited, if the cell corresponding to the base station configures EPDCCH for all UEs supporting EPDCCH, EPDCCH resources and PDCCH resources are unevenly distributed, which results in a decrease in system resource utilization rate and a decrease in throughput.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a control channel resource allocation method and apparatus, which can flexibly allocate control channel resources used by a UE according to control channel conditions and system resource scheduling conditions, so as to improve system resource utilization and throughput.
A method of control channel resource allocation, the method comprising:
detecting whether a first terminal which is not configured with an Enhanced Physical Downlink Control Channel (EPDCCH) resource exists in a first type of terminal, wherein the first type of terminal is a terminal with interference intensity exceeding a preset interference threshold;
when detecting that a first terminal which is not configured with the EPDCCH resources exists in the first type of terminal, acquiring the current EPDCCH resource allowance, and detecting whether the current EPDCCH resource allowance is larger than a preset EPDCCH resource allowance threshold;
and if the current EPDCCH resource allowance is larger than the preset EPDCCH resource allowance threshold, configuring the EPDCCH resource for the first terminal, and updating the current EPDCCH resource allowance and the current PDCCH resource allowance.
A control channel resource allocation apparatus, the apparatus comprising:
the first detection module is used for detecting whether a first terminal which is not configured with an Enhanced Physical Downlink Control Channel (EPDCCH) resource exists in a first type of terminal, wherein the first type of terminal is a terminal with interference intensity exceeding a preset interference threshold;
The second detection module is used for acquiring the current EPDCCH resource allowance when detecting that the first terminal which is not configured with the EPDCCH resource exists in the first type terminal, and detecting whether the current EPDCCH resource allowance is larger than a preset EPDCCH resource allowance threshold value or not;
and the first resource allocation module is used for allocating the EPDCCH resources for the first terminal and updating the current EPDCCH resource allowance and the current PDCCH resource allowance if the current EPDCCH resource allowance is larger than the preset EPDCCH resource allowance threshold value.
According to the control channel resource configuration method and device, the terminals with the interference intensity exceeding the preset interference threshold value are determined to be the terminals with the first type, the EPDCCH resources are configured preferentially for the terminals with the first type when the downlink channel resource configuration is carried out, the EPDCCH resources are configured for one of the terminals with the first type, which are not configured with the EPDCCH resources, under the condition that the terminals with the first type are not configured with the EPDCCH resources and the EPDCCH resources are larger than the preset EPDCCH resource threshold value, and the current EPDCCH resource allowance and the current PDCCH resource allowance are updated after the EPDCCH resources are configured. According to the terminal type and the EPDCCH resource allowance, the downlink control channel resource is reasonably configured under the condition that the EPDCCH resource allowance is sufficient, the EPDCCH resource is configured for the first type terminal as much as possible, the anti-interference capability of the terminal is improved, and the utilization rate and the throughput of the system resource are improved.
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FIG. 1 is a flow chart of a method of controlling channel resource allocation in one embodiment;
FIG. 2 is a flow chart of a method for configuring control channel resources in another embodiment;
FIG. 3 is a flow chart of a method for exchanging control channel resources for a first type of terminal and a second type of terminal in one embodiment;
FIG. 4 is a flow chart of a method of controlling channel resource allocation in one embodiment;
FIG. 5 is a flow chart of a method of controlling channel resource allocation in another embodiment;
FIG. 6 is a flow chart of a method of controlling channel resource allocation in one embodiment;
FIG. 7 is a flow chart of a method for configuring control channel resources in one embodiment;
FIG. 8 is a flow chart of a method for configuring control channel resources in another embodiment;
fig. 9 is a block diagram of a control channel resource allocation apparatus in one embodiment;
fig. 10 is a block diagram of a control channel resource allocation apparatus in another embodiment;
FIG. 11 is a block diagram of a second resource allocation module in one embodiment;
fig. 12 is a block diagram of a control channel resource allocation apparatus in one embodiment;
fig. 13 is a block diagram of a control channel resource allocation apparatus in another embodiment;
fig. 14 is a block diagram of a control channel resource allocation apparatus in one embodiment;
Fig. 15 is a block diagram of a control channel resource allocation apparatus in another embodiment;
fig. 16 is a block diagram of a control channel resource allocation apparatus according to still another embodiment.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In one embodiment, as shown in fig. 1, there is provided a control channel resource allocation method, including the following:
in step S101, it is detected whether a first terminal without configuring EPDCCH resources of an enhanced physical downlink control channel exists in a first type of terminal, where the first type of terminal is a terminal with interference strength exceeding a preset interference threshold.
In this embodiment, the base station records and stores recording information reported by the terminal, where the recording information includes RSRP (Reference Signal Receiving Power, reference signal received power), which is a key parameter representing wireless signal strength in the LTE network, and represents an average value of signal powers received on all REs (resource elements) carrying reference signals in a certain symbol; RSRQ (Reference Signal Receiving Quality, reference signal received quality), mainly ranks different LTE candidate cells according to signal quality, and can report the combined effect of signal strength and interference. The base station detects the interference of the terminal according to the stored terminal record information, marks the terminal with the interference intensity exceeding the preset interference threshold as a first type terminal (UEType 1), marks the terminal with the interference intensity lower than the preset interference threshold as a second type terminal (UEType 2), and respectively forms the first type terminal and the second type terminal into corresponding sets for storage. Specifically, the base station may determine the cell type according to the A3 event, define UE as UE type1 when initially accessing, define two sub-events A3-1 and A3-2 in the A3 event, enable the UE triggering the A3-1 event to be UE type2, and enable the UE triggering the A3-2 event to be UE type1, where the A3 event is a UE measurement event defined in the LTE protocol.
When configuring control channel resources of a terminal, since the enhanced physical downlink control channel EPDCCH has a strong anti-interference capability, in order to enhance the anti-interference capability of the terminal, EPDCCH resources should be configured for as many as possible first type terminals existing in a base station cell, so when configuring control channel resources of the terminal in the base station cell, firstly, the control channel resources configured by the first type terminals in the cell are detected, and whether terminals without EPDCCH resources are in a set formed by the first type terminals is determined.
In step S102, when detecting that there is a first terminal without EPDCCH resources in the first type of terminals, the current EPDCCH resource margin is obtained, and whether the current EPDCCH resource margin is greater than a preset EPDCCH resource margin threshold is detected.
The current EPDCCH resource margin refers to the number of unused ECCEs (Enhanced Control Channel Element, enhanced control channel elements). The pre-allocated ECCE number characterizes EPDCCH resources, i.e. the allocation of used ECCEs, and the unused ECCE number represents EPDCCH resource margin.
If it is currently detected that there is a first terminal with no EPDCCH resources configured in the first type of terminal, a current EPDCCH resource allowance is obtained according to historical scheduling information, specifically, the historical scheduling information refers to the total number of ECCE resources or the total number of CCE (Control Channel Element ) resources, where the total number of ECCE resources represents an EPDCCH resource capacity, and the total number of CCE resources represents a PDCCH resource capacity.
Further, the historical scheduling information can be counted by adopting a TTI level filtering method, and the algorithm is as follows: current filtered value = (1- α) × historical filtered value + α× current instantaneous value, in particular, when there is no historical filtered value, current filtered value = current instantaneous value, where α is a filter factor, is an internal parameter, and can be configured as needed. The history-free filter value refers to that the corresponding terminal has not been invoked before. The EPDCCH resource margin is equal to a difference between the total number of ECCE resources and the number of used ECCE resources, where the number of used ECCE resources may be determined based on the current TTI adaptation result.
The EPDCCH resource allowance threshold is preset, for example, the EPDCCH resource allowance threshold is set to be N times of the EPDCCH total resource, and the value of N is 0.4 to 1. And comparing the acquired current EPDCCH resource allowance with an EPDCCH resource allowance threshold, if the current EPDCCH resource allowance is larger than or equal to the EPDCCH resource allowance threshold, the current EPDCCH resource allowance is sufficient, and if the current EPDCCH resource allowance is smaller than the EPDCCH resource allowance threshold, the current EPDCCH resource allowance is insufficient.
Step S103, if the current EPDCCH resource margin is greater than the preset EPDCCH resource margin threshold, configuring EPDCCH resources for the first terminal, and updating the current EPDCCH resource margin and the current PDCCH resource margin.
If the current EPDCCH resource allowance is detected to be larger than the preset EPDCCH resource allowance threshold, the current EPDCCH resource allowance is sufficient, the EPDCCH resources can be allocated again, the first terminal which is not configured with the EPDCCH in the set formed by the terminals of the first type is obtained, the EPDCCH resources are configured for the first terminal, and when the EPDCCH resources are configured for the first terminal, the PDCCH resources configured for the first terminal are released, and the current EPDCCH resource allowance and the current PDCCH resource allowance are updated. In particular, when performing EPDCCH resource configuration on a first terminal, it needs to detect whether the first terminal can support EPDCCH, if not, the first terminal cannot be configured, and it needs to reacquire a terminal from a first type terminal that does not configure EPDCCH for configuration.
Further, the process of configuring the control channel resources for the terminal is a periodic process, and multiple control channel resource configurations are possible in one configuration period, where the EPDCCH resource margin after the current update is the EPDCCH resource margin m_epdcch after the last update i Difference Δecce from the number of changes in ECCE caused upon updating, i.e. m_epdcch i+1 ＝M_epdcch i Δecce. Likewise, the currently updated PDCCH resource margin m_pdcch i+1 ＝M_pdcch i Δcce, where i refers to the number of times the determination of whether there are unconfigured EPDCCH resources in the first type of terminal is performed in one configuration period, Δecce and Δcce refer to the number of ECCE and CCE changes caused by reconfiguring control channel resources.
Specifically, in the current configuration process, after the EPDCCH resource is configured for the first terminal, the updated current EPDCCH resource allowance is obtained by subtracting the EPDCCH resource Δecce occupied by the first terminal from the EPDCCH resource allowance before updating, where Δecce may be obtained by a filtering method. In particular, if the first terminal has not been invoked before, that is, the first terminal does not occupy the control channel resource information before, the PDCCH resource margin is unchanged, if the first terminal has previously configured the PDCCH resource, the current PDCCH resource margin is updated by adding the PDCCH resource margin before updating to the resource Δcce released by the first terminal by removing the configured PDCCH, where Δcce may be obtained by converting EPDCCH resource occupied by the first terminal, Δcce is N times of Δecce, where N may be 0.7, 0.8 or 0.9 according to simulation result and test data conversion.
In this embodiment, by detecting control channel resources configured by the first type of terminal, when detecting that there is a terminal with no EPDCCH resource configured in the first type of terminal, a preset EPDCCH resource margin threshold is used to determine whether the current EPDCCH resource margin is sufficient, and when the EPDCCH resource margin is sufficient, EPDCCH resources are configured for the first terminal in the first type of terminal with no EPDCCH resource configured. And configuring the EPDCCH resources according to the channel conditions corresponding to the first type terminals and the scheduling conditions of the system EPDCCH resources, so that the EPDCCH resources are configured for the first type terminals as much as possible under the condition that the EPDCCH resources are sufficient, the control channel performance of the terminals with higher interference is improved, and the system performance is further improved.
In one embodiment, as shown in fig. 2, after step S102, the method further includes:
in step S104, if the current EPDCCH resource margin resource is smaller than the preset EPDCCH resource margin threshold, detecting whether there is a second terminal configured with the EPDCCH resource in the second type terminal, where the second type terminal is a terminal with interference strength lower than the preset interference threshold.
In the case that the presence of the terminal with the first type of terminal without the EPDCCH resource is detected and the shortage of the EPDCCH resource allowance is detected, if the EPDCCH resource configuration is directly performed for the terminal with the first type without the EPDCCH resource, the EPDCCH resource is limited, so that the situation that the EPDCCH resource cannot be used by the terminal with the first type with the EPDCCH resource is caused. At this time, the base station detects the control channel resource of the second type terminal by acquiring the configuration information, and determines whether the terminal configured with the EPDCCH resource exists in the second type terminal. The second type terminal refers to a terminal with interference strength lower than a preset interference threshold, and the second type terminal configures PDCCH resources to ensure normal operation of the terminal, so that when detecting that a first type terminal without EPDCCH resources is present and EPDCCH resources, the second type terminal is considered to configure PDCCH resources, and EPDCCH resources are configured in the first type terminal as much as possible.
Step S105, if there is, exchanging the configuration of the control channel resources of the first terminal and the second terminal, and updating the current EPDCCH resource margin and the current PDCCH resource margin.
Specifically, when the base station detects that the terminal with the EPDCCH resource is located in the second type terminal according to the configuration information, it indicates that the second type terminal occupies a part of the EPDCCH resource at this time, and the EPDCCH resource is not reasonably used, the base station needs to remove the EPDCCH resource configured in the second type terminal by changing the configuration parameter, but in order to ensure that the EPDCCH resource is used as much as possible and to maintain the balance of the control channel EPDCCH resource and the PDCCH resource, the EPDCCH resource configuration in the second type terminal cannot be removed all at once, the terminal in the second type terminal is configured to remove the EPDCCH resource one by one, and once the EPDCCH resource configuration of each second type terminal is removed, and when the EPDCCH resource configuration of each second type terminal is removed, the current EPDCCH resource allowance is determined once, until the current EPDCCH resource allowance is larger than the current EPDCCH resource allowance, and when the EPDCCH resource allowance is limited, the EPDCCH resource configuration of the second type terminal with the EPDCCH resource configuration removed is stopped, and one of the terminals without the EPDCCH resource configuration in the first type terminal is obtained, and the EPDCCH resource configuration is updated.
Further, in the control channel resource configuration process of this embodiment, the ECCE change number Δecce is the ECCE number obtained by removing the configured EPDCCH resource by the second type terminal minus the ECCE number occupied by the terminal newly configured EPDCCH resource in the first type terminal, where the second type terminal removes the ECCE number corresponding to each terminal of the EPDCCH resource, and the ECCE number occupied by the first terminal is obtained according to the filtering method respectively according to the corresponding history call information. And obtaining updated current EPDCCH resource allowance according to the delta ECCE. The updated current PDCCH resource allowance is obtained according to delta CCE, delta CCE can be obtained according to delta ECCE, and delta CCE is N times of delta ECCE.
Step S106, if not, detecting whether the residual difference value between the current EPDCCH resource residual and the current PDCCH resource residual is within the preset residual difference value range.
Specifically, if there is a terminal with no EPDCCH resource configured in the first type of terminal, but the EPDCCH resource allowance is insufficient, and there is no second type of terminal with EPDCCH resource configured, then it is detected whether the EPDCCH resource allowance and the PDCCH resource allowance are relatively balanced, that is, whether excessive EPDCCH resources are allocated in the system, and more PDCCH resources are empty, which results in system performance degradation.
In this embodiment, when detecting that there is a terminal with no EPDCCH resource configured in the first type terminal and the EPDCCH resource margin is smaller than a preset EPDCCH resource margin threshold, by detecting whether the EPDCCH resource is configured in the second type terminal, a corresponding operation is performed according to the detection result, so as to ensure that as many EPDCCH resources as possible are allocated to the first type terminal, and simultaneously, ensure that EPDCCH resources and PDCCH resources are allocated in balance, thereby improving system performance and throughput.
In one embodiment, as shown in fig. 3, the number of enhanced control channel elements ECCE represents EPDCCH resource capacity, step S105 includes:
step S105A, a first set of terminals with EPDCCH resources configured in the second type of terminals is obtained, a second terminal is obtained from the first set, and the second terminal is used as a current terminal.
Step S105B, obtaining the first ECCE number occupied by the current terminal according to the historical scheduling information of the current terminal, adding the first ECCE number and the current ECCE number to obtain the updated ECCE number, and taking the updated ECCE number as the current ECCE number.
Specifically, a first ECCE number corresponding to EPDCCH resources occupied by a current terminal is obtained by a filtering method according to historical scheduling information, a current ECCE number corresponding to a current EPDCCH resource allowance is obtained, an updated ECCE number obtained by adding the first ECCE number and the current ECCE number is calculated, the updated ECCE number refers to the current EPDCCH resource allowance after the EPDCCH resources configured by the current terminal are removed, and the updated ECCE number is compared with a preset ECCE number threshold corresponding to a preset EPDCCH resource allowance threshold.
Step S105C, determining whether the current ECCE number is less than a preset ECCE number threshold.
Step 105D, if yes, the next terminal corresponding to the current terminal is obtained from the first set, and the next terminal is taken as the current terminal, and the process proceeds to step 105B.
Specifically, if the current ECCE number is smaller than the preset ECCE number threshold, the second type terminal configured with the EPDCCH resource is continuously acquired, and step S105B is repeated to obtain a current EPDCCH resource margin after the EPDCCH resource configured by the current terminal is removed, and the current EPDCCH resource margin is compared with the preset EPDCCH resource margin threshold.
Step S105E, if not, configuring PDCCH resources from the second type terminal acquired from the first set, configuring EPDCCH resources for the first terminal, and updating the current ECCE number and the current CCE number.
Specifically, a first ECCE number corresponding to a current terminal is obtained, the first ECCE number is added to the current ECCE number to obtain an updated ECCE number, then the updated ECCE number is used as the current ECCE number, another terminal with EPDCCH resources configured in the second type terminal is obtained as the current terminal, the estimation process is repeated until the updated current ECCE number is greater than a preset ECCE number threshold value after being accumulated to the number of ECCEs corresponding to one of the terminals, then the traversed second type terminals with EPDCCH resources configured are obtained, PDCCHs are configured for the second type terminals through parameter configuration, then one terminal without EPDCCH configured in the first type terminals is obtained, and configuration is changed to EPDCCH resources configured. After exchanging the configuration resources of the second type terminal and the first type terminal, the current ECCE number and the current CCE number are updated.
In one embodiment, after step S103 or step S105, further includes:
and judging whether the current updated resource allowance number reaches a preset updated resource allowance number threshold, if not, entering a step S101, and if so, ending the control channel resource allocation of the terminal.
In this embodiment, when the configuration is performed on the control channel resources of the terminal, in a configuration period, when it is detected that there is a first type terminal without EPDCCH resources configured and the EPDCCH resources are sufficient, or when it is detected that there is a first type terminal without EPDCCH resources configured and the EPDCCH resources are insufficient, and it is detected that there is a second type terminal with EPDCCH resources configured, one of the first type terminals without EPDCCH resources is acquired, and the EPDCCH resources are configured for the one of the first type terminals, so as to avoid the problem of unbalanced resource configuration caused by configuring the EPDCCH resources for all the first type terminals, but multiple detection and multiple configuration are required, but since the reconfiguration of the control channel resources corresponding to the first type terminal or the second type terminal increases the system load, the update of the resources margin number threshold is set in advance according to the system network performance KPI (Key Performance Indicators, key performance index), if the detection is repeated in step S101 in the preset threshold, and if the detection result is greater than the preset threshold, the configuration period is ended according to different detection results.
In this embodiment, a preset threshold value for updating the resource allowance is set according to the network KPI in one resource configuration period, so that the risk of temporary degradation of terminal performance caused by too large fluctuation of the cell KPI due to too many times of updating the resource allowance is reduced.
In one embodiment, a control channel resource allocation method is provided, including:
and if the EPDCCH resources are configured by the first type terminal, detecting whether the residual difference value of the current EPDCCH resource residual and the current PDCCH resource residual is within a preset residual difference value range.
In this embodiment, when detecting that the first type of terminal is configured with EPDCCH resources, it is indicated that the terminals that have larger interference and support EPDCCH are configured with EPDCCH resources, and at this time, it needs to detect whether the EPDCCH resources and PDCCH resources are configured in balance, so as to facilitate subsequent operations, avoid the defect that the EPDCCH resources are configured too much to be used normally, and further improve system performance.
In one embodiment, as shown in fig. 4, step S106 includes:
step S106A, obtaining the current EPDCCH resource allowance and the current PDCCH resource allowance according to the historical scheduling information, and comparing the difference obtained by subtracting the current EPDCCH resource allowance from the current PDCCH resource allowance with a preset allowance difference range.
In this embodiment, a margin difference range between the EPDCCH resource and the PDCCH resource is set in advance according to the total number of the EPDCCH resource and the total number of the PDCCH resource, so as to detect whether the EPDCCH resource and the PDCCH resource are allocated equally. Specifically, a lower limit t_low=a of the preset margin difference range is set to the total number of EPDCCH resources, and an upper limit t_high=b of the preset margin difference range is set to the total number of EPDCCH resources, where A, B may be set according to a specific situation.
Step S106B, if the difference is larger than the upper limit value of the preset margin difference range, the current PDCCH resource margin is larger than the current EPDCCH resource margin, whether a second terminal with EPDCCH resources configured in the second type terminal exists or not is judged, if yes, step S106C is executed, and if not, step S106D is executed.
If the difference of the current PDCCH resource margin minus the current EPDCCH resource margin is greater than the upper limit t_high of the preset margin difference range, which indicates that the current PDCCH resource margin and the EPDCCH resource margin are unbalanced, the current PDCCH resource margin is greater than the current EPDCCH resource margin, that is, more terminals configuring the EPDCCH resource, and it is determined whether a second type terminal having lower interference configures the EPDCCH resource, if so, step S106C is executed, and if not, step S106D is executed.
Step S106C, configuring PDCCH resources for the second terminal, updating the current EPDCCH resource margin and the current PDCCH resource margin, and then executing step S106G.
Specifically, if the EPDCCH resource is configured in the second type of terminal, in order to avoid that the first type of terminal cannot normally use the EPDCCH resource due to the excessive EPDCCH resource occupied by the second type of terminal, one of the second type of terminals configured with the EPDCCH resource is obtained, a configuration parameter corresponding to the terminal is changed, a PDCCH resource is configured for the terminal, so that the terminal releases the configured EPDCCH resource, and updates a current EPDCCH resource allowance and a current PDCCH resource allowance, the configuration is completed, the updated EPDCCH resource allowance is an EPDCCH resource allowance before update plus an EPDCCH resource occupied before the second terminal, the updated PDCCH resource allowance is a PDCCH resource allowance before update minus a PDCCH resource occupied after the second terminal is configured, and then step S106G is executed.
Step S106D, calculating the current EPDCCH resource limit, detecting whether the current EPDCCH resource limit is larger than a preset EPDCCH resource limit threshold, if not, executing step S106E, if so, executing step S106F.
Specifically, the preset EPDCCH resource limitation threshold refers to a preset terminal configured with EPDCCH resources, and an upper limit number of terminals which have a request for EPDCCH resources to be scheduled but are not scheduled is determined according to the cell capacity. Specifically, the preset EPDCCH resource limitation threshold tr_epdcch is m×the current TTI scheduling terminal number, where the value of M is 0.1 to 0.4, and TTI (transmission time-interval) is a transmission time interval, and the scheduled user data is sent in each TTI.
And judging whether the number of terminals which are configured with the EPDCCH resources and transmit the EPDCCH scheduling request but are not scheduled is greater than the preset upper limit number of the terminals by counting the number of terminals which are configured with the EPDCCH resources and are not scheduled every TTI in the current configuration period, if not, executing the step S106E, and if so, executing the step S106F.
Step S106E, the control channel resource allocation to the terminal is ended.
Specifically, if the current EPDCCH resource limitation is detected to be less than or equal to the preset EPDCCH resource limitation threshold, it is indicated that the EPDCCH resource is not limited at this time, and the configuration of the control channel resource in the current configuration period is completed.
Step S106F, a third terminal with EPDCCH resources configured in the first type terminal is obtained, PDCCH resources are configured for the third terminal, and the current EPDCCH resource allowance and the current PDCCH resource allowance are updated.
Specifically, if it is detected that the current EPDCCH resource limitation is greater than the preset EPDCCH resource limitation threshold, it is indicated that there may be a plurality of terminals configured with EPDCCH resources but incapable of invoking EPDCCH resources at this time, one of the terminals configured with EPDCCH resources in the first type of terminal is obtained, configuration parameters of the terminal are changed, PDCCH resources are configured for the terminal, and the current EPDCCH resource allowance and the current PDCCH resource allowance are updated. Further, the current EPDCCH resource margin is an EPDCCH resource margin before updating plus an EPDCCH resource occupied by a first type of terminal of the new configuration PDCCH resource, and the current PDCCH resource margin is a PDCCH resource margin before updating minus a PDCCH resource occupied by the first type of terminal of the new configuration PDCCH resource.
Step S106G, judging whether the number of times of updating the resource allowance reaches a preset updated resource allowance number threshold, if not, executing step S106A, and if so, ending the control channel resource allocation of the terminal.
Specifically, if the EPDCCH resource configuration is removed from the second type terminal or the EPDCCH resource configuration is removed from the first type terminal multiple times in the process of adjusting the EPDCCH resource margin and the PDCCH resource margin balance, judging whether the number of times of removal reaches the preset updated resource margin number threshold, if yes, completing the current configuration period, if not, executing step S106A, comparing the updated current EPDCCH resource margin with the updated current PDCCH resource margin, and executing corresponding operations according to the comparison result until the current configuration period is ended.
In this embodiment, by setting the preset margin difference threshold, in the case that the current PDCCH resource margin is larger, EPDCCH resources are removed for the second type terminal or PDCCH resources are configured for the first type terminal, so as to adjust balance between EPDCCH resource margin and PDCCH resource margin, and improve system performance.
In one embodiment, as shown in fig. 5, after step S106A, the method further includes:
Step S108, if the difference value is smaller than or equal to the lower limit value of the preset margin difference value range, the current EPDCCH resource margin is larger than the current PDCCH resource margin, and the current PDCCH resource margin is obtained according to the historical scheduling information.
Step S108A, judging whether the current PDCCH resource allowance is larger than a preset PDCCH resource allowance threshold, if yes, ending the configuration of the terminal control channel resources, and if not, executing step S108B.
Specifically, the EPDCCH resource balance is ensured, and meanwhile, the configured resources are required to be ensured to be able to be invoked, so when the current EPDCCH resource allowance is detected to be larger, the corresponding PDCCH resource allowance is acquired, compared with a preset PDCCH allowance threshold value, if the corresponding PDCCH resource allowance is larger than the preset PDCCH allowance threshold value, the EPDCCH resource and the PDCCH resource can be normally invoked at the moment, and the configuration of the terminal control channel resource in the current configuration period is ended. If the current PDCCH resource is smaller than the preset PDCCH margin threshold, it is indicated that the current PDCCH resource may not be scheduled normally, and step S108B is performed.
Step S108B, a fourth terminal with PDCCH resources configured in the second type terminal is obtained, EPDCCH resources are configured for the fourth terminal, and the current EPDCCH resource allowance and the current PDCCH resource allowance are updated.
Specifically, when EPDCCH resources are sufficient and PDCCH resource margins are insufficient, one of terminals with PDCCH resources configured in the second type of terminal is obtained, EPDCCH resources are configured for the terminal, PDCCH resources configured by the terminal are released, the current EPDCCH resource margin is obtained by subtracting the EPDCCH resources configured by the second type of terminal from the EPDCCH resource margin before updating, and the current PDCCH resource margin is obtained by adding PDCCH resources released by the second type of terminal to the PDCCH resource margin before updating.
Step S108C, judging whether the number of times of updating the resource allowance reaches the preset number of times of updating the resource allowance threshold, if not, executing step S106A, if so, ending the control channel resource allocation of the terminal.
Specifically, the control channel resources corresponding to the first type terminal or the second type terminal are reconfigured according to the current EPDCCH resource allowance and the current PDCCH resource allowance, but in order to maintain the KPI stability of the system, a frequency threshold of reconfiguration resources is preset, that is, an updated resource allowance frequency threshold is preset, if the frequency of the current updated control channel resource allowance reaches the preset updated resource allowance frequency threshold, the control channel resource configuration of the terminal in the current configuration period is ended, and if the frequency of the current updated control channel allowance does not reach the preset updated resource allowance frequency threshold, step S106A is repeatedly executed, and the updated current EPDCCH resource allowance and the current PDCCH allowance are detected.
In one embodiment, after step S106A, further includes:
if the difference is greater than the lower limit value of the preset margin difference range and less than or equal to the upper limit value of the preset margin difference range, the current EPDCCH resource margin and the current PDCCH resource margin are balanced, and the control channel resource allocation of the terminal is ended.
In this embodiment, if the balance between the current EPDCCH resource margin and the current PDCCH resource margin is detected after all the first type terminals are detected to be configured with EPDCCH resources, the configuration of the terminal control channel resource in the current configuration period is ended.
In one embodiment, as shown in fig. 6, there is provided a control channel resource allocation method, including the following:
step S210, detecting whether there is a first terminal without configuring the EPDCCH resource of the enhanced physical downlink control channel in the first type of terminal, if yes, executing step S220, and if not, executing step S240.
Step S220, obtaining the current EPDCCH resource allowance, detecting whether the current EPDCCH resource allowance is greater than a preset EPDCCH resource allowance threshold, if yes, executing step S220A, and if not, executing step S220B.
Step S220A, the EPDCCH resource is configured for the first terminal, and the current EPDCCH resource margin and the current PDCCH resource margin are updated, and then step S230 is performed.
Step S220B, detecting whether there is a second terminal configured with EPDCCH resources in the second type of terminal, if so, executing step S220C, and if not, executing step S240.
Step S220C, exchanging the configuration of the control channel resources of the first terminal and the second terminal, and updating the current EPDCCH resource margin and the current PDCCH resource margin, and then performing step S230.
Step S230, judging whether the current updated resource allowance number reaches the preset updated resource allowance number threshold, if not, executing step S210, and if so, executing step S290.
Step S240, obtaining the current EPDCCH resource allowance and the current PDCCH resource allowance according to the historical scheduling information, and comparing the difference obtained by subtracting the current EPDCCH resource allowance from the current PDCCH resource allowance with a preset allowance difference range.
Step S250, if the difference is greater than the upper limit value of the preset margin difference range, judging whether the second type terminal has the second terminal configured with the EPDCCH resource, if so, executing step S250A, and if not, executing step S250B.
Step S250A, configuring PDCCH resources for the second terminal, and updating the current EPDCCH resource margin and the current PDCCH resource margin, and then executing step S280.
Step S250B, calculating the current EPDCCH resource limitation, detecting whether the current EPDCCH resource limitation is greater than the preset EPDCCH resource limitation, if so, executing step S290, and if not, executing step S250C.
Step S250C, a third terminal with EPDCCH resources configured in the first type terminal is obtained, PDCCH resources are configured for the third terminal, the current EPDCCH resource allowance and the current PDCCH resource allowance are updated, and then step S280 is performed.
Step S260, if the difference is smaller than or equal to the lower limit value of the preset margin difference range, the current PDCCH resource margin is obtained according to the historical scheduling information, whether the current PDCCH resource margin is larger than the preset PDCCH resource margin threshold value is judged, if yes, step S290 is executed, and if not, step S206A is executed.
Step S206A, a fourth terminal with PDCCH resources configured in the second type terminal is obtained, EPDCCH resources are configured for the fourth terminal, the current EPDCCH resource allowance and the current PDCCH resource allowance are updated, and step S280 is executed.
Step S270, if the difference is greater than the lower limit value of the preset margin difference range and less than or equal to the upper limit value of the preset margin difference range, the current EPDCCH resource margin and the current PDCCH resource margin are balanced, and step S290 is performed.
Step S280, judging whether the current updated resource allowance number reaches the preset updated resource allowance number threshold, if not, executing step S240, and if so, executing step S290.
Step S290, the control channel resource configuration of the terminal in the current configuration period is ended.
In this embodiment, the control channel resource information allocated to the first terminal type is detected, the control channel resource of the first type terminal or the second type terminal is reconfigured according to the detection result, and whether the system control channel resource is balanced or not is determined according to the current EPDCCH resource allowance and the current PDCCH resource allowance, so as to configure the configuration information of the first type terminal and/or the second type terminal. And reconfiguring control channel resources according to the terminal type and the system resource configuration condition so as to improve the system performance and throughput.
In a specific embodiment, as shown in fig. 7, in a configuration period, a control channel resource configuration method is provided, which includes the following steps:
in step S310, it is detected whether there is a terminal not configured with EPDCCH resources among the first type of terminals.
Specifically, in the macro-micro heterogeneous network scenario, the micro base station edge UE improves the control channel performance of the terminal with larger interference by configuring the EPDCCH resource because the macro base station signal affects the interference more. Detecting the current terminal according to an A3 event triggering condition Mn+ofn+Ocn-Hys (3) > Ms+Ofs+off, wherein Mn is a neighbor cell measurement result, ofn is a neighbor cell frequency specific deviation, ocn is a neighbor cell personality deviation, hys (3) is an A3 event hysteresis parameter, ms is a current cell RSRP measurement result, ofs is a current cell frequency specific deviation, and Off is an A3 event deviation. Judging whether the current terminal is a high-interference terminal according to the A3 event triggering condition, if so, marking the current terminal as a first Type terminal (UEType 1), if not, marking the current terminal as a second Type terminal (UEType 2), forming one terminal set by all the UE Types 1, and forming another terminal set by all the UETypes 2.
In step S320, when it is detected that there is a first type of terminal in which EPDCCH resources are not configured, a current EPDCCH resource margin and a current PDCCH resource margin are detected.
Specifically, the current EPDCCH resource allowance is calculated by a filtering method according to the historical scheduling information to obtain the current EPDCCH resource allowance as mucce, the current PDCCH resource allowance as nCCE, and nCCE is converted into ECCE as n 1 ECCE. The mcce is compared to a preset EPDCCH resource margin threshold t_epdcch.
Step S330, when it is determined that the current EPDCCH resource margin is greater than the preset EPDCCH resource margin threshold, a first terminal without EPDCCH resources configured in the first type of terminal is obtained, and EPDCCH resources are configured for the first terminal, and the current EPDCCH resource margin and the current PDCCH resource margin are updated.
Specifically, when the current EPDCCH resource margin is detected to be sufficient, one of the terminals in the first type of terminals, which is not configured with EPDCCH resources, is configured with EPDCCH resources, and in particular, if the current terminal is not previously invoked, the current EPDCCH resource is updatedThe residual is mECCE-16ECCE, and the current PDCCH resource residual is unchanged and still is n 1 ECCE。
Step S340, judging whether the number of times of the control channel resources corresponding to the current reconfiguration terminal is larger than a preset reconfiguration number threshold, if not, executing step S310.
In step S350, when detecting that the first type terminals are configured with EPDCCH resources, the difference M obtained by subtracting the current EPDCCH resource margin from the current PDCCH resource margin is compared with a preset margin difference range.
Specifically, if EPDCCH resources are configured for one of the terminals of the first type in the same configuration period, after step S310 is performed, it is detected that EPDCCH resources are configured for the current terminal of the first type, and whether the current EPDCCH resource margin is balanced with the current PDCCH resource margin is determined.
In step S360, when the difference M is detected to be greater than the upper limit value of the preset margin difference range, it is detected whether there is a second type terminal configured with EPDCCH resources.
Specifically, when the difference M is detected to be greater than the upper limit value of the preset margin difference range, the EPDCCH resource and the PDCCH resource are unbalanced, the PDCCH resource margin is more, that is, the EPDCCH resource is too much occupied, and whether a terminal configured with the EPDCCH resource exists in the second type of terminal is detected.
And step S370, when detecting that the second terminal with the EPDCCH resource is arranged in the second type terminal, removing the EPDCCH resource allocation for the second terminal, and updating the current EPDCCH resource allowance and the current PDCCH resource allowance.
Specifically, assuming that ECCE occupied by the second type terminal currently configured with EPDCCH resources is L, the current EPDCCH resource margin is updated to (m-16+l) ECCE, and the current PDCCH resource margin is updated to (n) 1 -K)ECCE。
Step S380, judging whether the number of times of the control channel resources corresponding to the current reconfiguration terminal is larger than a preset reconfiguration number threshold, if not, executing step S350.
Step S390, if the M is detected to be greater than the lower limit value of the preset margin difference range and less than the upper limit value of the preset margin difference range when step S350 is executed again, ending the current configuration period.
Specifically, after the EPDCCH resource configured by one of the second type terminals is removed, the current EPDCCH resource margin and the current PDCCH resource margin are updated, and step S350 is executed back, where the current EPDCCH resource margin and the current PDCCH resource margin are detected to be balanced by comparing the updated current EPDCCH resource margin and the current PDCCH resource margin, so as to end the current terminal control channel resource configuration period.
In a specific embodiment, as shown in fig. 8, in a configuration period, a control channel resource configuration method is provided, which includes the following steps:
in step S410, it is detected whether there is a terminal not configured with EPDCCH resources among the first type of terminals.
In step S420, when it is detected that there is a first type of terminal in which EPDCCH resources are not configured, a current EPDCCH resource margin and a current PDCCH resource margin are detected.
Specifically, the current EPDCCH resource margin is detected as mucece, and the current PDCCH resource margin is n 1 ECCE。
In step S430, when it is determined that the current EPDCCH resource margin is less than the preset EPDCCH resource margin threshold, it is detected whether a terminal configured with EPDCCH resources exists in the second type of terminal.
In step S440, if there is a terminal with EPDCCH resources configured in the second type terminal, the EPDCCH resources occupied by the current terminal in the second type terminal set are obtained, and after the EPDCCH resource configuration is removed for the current terminal, whether the current EPDCCH resource margin is greater than a preset EPDCCH resource margin threshold is calculated.
Specifically, according to the historical scheduling information, the EPDCCH resource occupied by the current terminal in the second type terminal set is obtained as kECCE, and after the current terminal is calculated to be removed from configuration, the EPDCCH resource allowance is M_epdcch new ＝M_epdcch old +k. An EPDCCH resource headroom threshold t_epdcch is preset and whether m_epdcchnew is greater than t_epdcch is detected.
In step S450, if the current EPDCCH resource margin is greater than the preset EPDCCH resource margin threshold, the EPDCCH resource configuration is removed for the current terminal, and EPDCCH resources are configured for the first type terminal.
Specifically, when M_epdcch is detected new >And when T_epdcch is detected, removing the EPDCCH resource configuration of the current terminal and configuring the EPDCCH resource for one of the terminals of the first type, updating the current EPDCCH resource allowance to be (m+k-16) ECCE, at the moment, assuming that the terminal of the first type for currently configuring the EPDCCH is not invoked before, configuring the EPDCCH resource occupied after configuration to be 16ECCE, and updating the current PDCCH resource allowance to be (n 1 -k)ECCE。
Step S460, judging whether the number of times of the control channel resources corresponding to the current reconfiguration terminal is larger than a preset reconfiguration number threshold, if not, executing step S410.
In step S470, when detecting that the EPDCCH resources are configured by the current first type terminal, comparing the current PDCCH resource margin with the current EPDCCH resource margin difference M with a preset margin difference range.
In step S480, when the difference M is detected to be greater than the upper limit value of the preset margin difference range, it is detected whether there is a second type terminal configured with EPDCCH resources.
In step S490, when it is detected that there is no second type terminal configured with EPDCCH resources, EPDCCH resources occupied by a third terminal configured with EPDCCH resources in the first type terminal are removed, and a current EPDCCH resource margin and a current PDCCH resource margin are updated.
Specifically, in the case of an EPDCCH resource margin deficiency, when detecting that the first type of terminal configures EPDCCH resources and there is no second type of terminal configuring EPDCCH resources currently, the reason for the EPDCCH resource deficiency may be that the first type of terminal allocates more EPDCCH resources, where the current EPDCCH resource is limited to R-EPDCCH is calculated, and the R-EPDCCH is compared with a preset EPDCCH resource limitation threshold tr_epdcch, and when R-EPDCCH is greater than tr_epdcch, EPDCCH resource configuration of one of the first type of terminals is removed. Assuming that EPDCCH resources occupied by the terminal with the configuration removed currently is qECCE, updating the current EPDCCH resource allowance to be m+k-16+qECCE, and updating the current PDCCH resource allowance to be n 1 -k-qECCE。
Step S4A0, judging whether the number of times of the control channel resources corresponding to the current reconfiguration terminal is larger than a preset reconfiguration number threshold, if not, executing step S470.
And step S4B0, if the step S470 is executed again, judging that the difference M is larger than the lower limit value of the preset margin difference range and smaller than the upper limit value of the preset margin difference range, and ending the current configuration period.
Specifically, when the EPDCCH resource allocation is removed for the first type terminal, it is detected that the difference M is greater than the lower limit value of the preset margin difference range and less than the upper limit value of the preset margin difference range, that is, the current EPDCCH resource margin and the PDCCH resource margin reach balance, and the current allocation period is ended.
As shown in fig. 9, in one embodiment, there is provided a control channel resource allocation apparatus, including:
the first detection module 910 is configured to detect whether a first terminal without configuring an enhanced physical downlink control channel EPDCCH resource exists in a first type of terminal, where the first type of terminal is a terminal with interference strength exceeding a preset interference threshold.
The second detecting module 920 is configured to, when detecting that there is a first terminal with no EPDCCH resource configured in the first type of terminal, obtain a current EPDCCH resource margin, and detect whether the current EPDCCH resource margin is greater than a preset EPDCCH resource margin threshold.
The first resource configuration module 930 is configured to configure EPDCCH resources for the first terminal if the current EPDCCH resource margin is greater than a preset EPDCCH resource margin threshold, and update the current EPDCCH resource margin and the current PDCCH resource margin.
As shown in fig. 10, in one embodiment, there is provided a control channel resource allocation apparatus, further including:
and a third detecting module 940, configured to detect whether a second terminal configured with the EPDCCH resource exists in the second type of terminals if the current EPDCCH resource margin resource is less than the preset EPDCCH resource margin threshold, where the second type of terminals is a terminal with interference strength less than the preset interference threshold.
A second resource configuration module 950, configured to exchange configurations of control channel resources of the first terminal and the second terminal, and update a current EPDCCH resource margin and a current PDCCH resource margin, if any.
A fourth detecting module 960 is configured to detect whether a margin difference between the current EPDCCH resource margin and the current PDCCH resource margin is within a preset margin difference range if the current EPDCCH resource margin is not present.
As shown in fig. 11, in one embodiment, the number of enhanced control channel elements ECCE represents EPDCCH resource capacity; the second resource configuration module 950 includes:
and the acquiring module 950A is configured to acquire a first set of terminals configured with EPDCCH resources in the second type of terminals, acquire the second terminal from the first set, and use the second terminal as a current terminal.
The updating module 950B is configured to obtain a first ECCE number occupied by the current terminal according to the historical scheduling information of the current terminal, add the first ECCE number to the current ECCE number to obtain an updated ECCE number, and use the updated ECCE number as the current ECCE number.
The detecting module 950C is configured to determine whether the current ECCE number is less than a preset ECCE number threshold.
And the cyclic update module 950D is configured to obtain a next terminal corresponding to the current terminal from the first set if yes, and take the next terminal as the current terminal to enter the update module 950B.
And a resource reconfiguration module 950E, configured to configure PDCCH resources for the second type of terminal acquired from the first set, configure the EPDCCH resources for the first terminal, and update the current ECCE number and the current CCE number if not.
As shown in fig. 12, in one embodiment, the control channel resource allocation apparatus further includes:
a first loop judgment module 970, configured to judge whether the current updated resource allowance number reaches a preset updated resource allowance number threshold; if not, the method proceeds to the first detection module 910, and if yes, the control channel resource allocation for the terminal is ended.
As shown in fig. 13, in one embodiment, the control channel resource allocation apparatus further includes:
a fifth detecting module 980, configured to detect whether the margin difference between the current EPDCCH resource margin and the current PDCCH resource margin is within a preset margin difference range if it is detected that the first type terminals are configured with EPDCCH resources.
As shown in fig. 14, in one embodiment, the control channel resource allocation apparatus further includes:
the difference comparing module 1010 is configured to obtain a current EPDCCH resource margin and a current PDCCH resource margin according to the historical scheduling information, and compare a difference obtained by subtracting the current EPDCCH resource margin from the current PDCCH resource margin with a preset margin difference range.
And a sixth detection module 1020, configured to determine whether a second terminal configured with EPDCCH resources exists in the second type of terminal if the difference is greater than the upper limit of the preset margin difference range, and if the current PDCCH resource margin is greater than the current EPDCCH resource margin.
And a third resource configuration module 1030, configured to configure PDCCH resources for the second terminal if the PDCCH resources exist, and update the current EPDCCH resource margin and the current PDCCH resource margin.
A seventh detecting module 1040 is configured to calculate a current EPDCCH resource limitation if the current EPDCCH resource limitation does not exist, and detect whether the current EPDCCH resource limitation is greater than a preset EPDCCH resource limitation.
The first ending module 1050 is configured to end the control channel resource configuration for the terminal if the current EPDCCH resource limitation is greater than the preset EPDCCH resource limitation.
And a fourth resource configuration module 1060, configured to obtain a third terminal configured with EPDCCH resources in the first type of terminal if the current EPDCCH resource limitation is less than or equal to the preset EPDCCH resource limitation, configure PDCCH resources for the third terminal, and update the current EPDCCH resource allowance and the current PDCCH resource allowance.
The second loop determining module 1070 is configured to determine whether the number of times of updating the resource margin reaches the preset updated resource margin number threshold, if not, enter the difference comparing module 1010, and if yes, end the control channel resource allocation for the terminal.
As shown in fig. 15, in one embodiment, the control channel resource allocation apparatus further includes:
and an eighth detection module 1080, configured to, if the difference is less than or equal to the lower limit value of the preset margin difference range, obtain the current PDCCH resource margin according to the historical scheduling information, and determine whether the current PDCCH resource margin is greater than the preset PDCCH resource margin threshold.
And a second ending module 1090, configured to end the control channel resource allocation for the terminal if yes.
And a fifth resource allocation module 10A0, configured to obtain a fourth terminal with PDCCH resources allocated in the second type terminal if not, allocate EPDCCH resources for the fourth terminal, update the current EPDCCH resource margin and the current PDCCH resource margin, and enter a second cycle determination module 1070.
As shown in fig. 16, in one embodiment, the control channel resource allocation apparatus further includes:
the third ending module 10B0 is configured to, if the difference is greater than the lower limit value of the preset margin difference range and less than or equal to the upper limit value of the preset margin difference range, balance the current EPDCCH resource margin and the current PDCCH resource margin, and end the control channel resource configuration for the terminal.
Those skilled in the art will appreciate that implementing all or part of the processes of the methods of the embodiments described above may be accomplished by computer programs stored on a computer readable storage medium, such as a computer system, and executed by at least one processor in the computer system to implement processes including embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random-access Memory (Random Access Memory, RAM), or the like.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (14)

1. A method of control channel resource allocation, the method comprising:
detecting whether a first terminal which is not configured with an Enhanced Physical Downlink Control Channel (EPDCCH) resource exists in a first type of terminal, wherein the first type of terminal is a terminal with interference intensity exceeding a preset interference threshold;
when detecting that a first terminal which is not configured with the EPDCCH resources exists in the first type of terminal, acquiring the current EPDCCH resource allowance, and detecting whether the current EPDCCH resource allowance is larger than a preset EPDCCH resource allowance threshold;
if the current EPDCCH resource allowance is larger than the preset EPDCCH resource allowance threshold, configuring the EPDCCH resource for the first terminal, and updating the current EPDCCH resource allowance and the current PDCCH resource allowance;
if the current EPDCCH resource allowance is smaller than the preset EPDCCH resource allowance threshold, detecting whether a second terminal with EPDCCH resources configured exists in a second type of terminal, wherein the second type of terminal is a terminal with interference intensity lower than the preset interference threshold;
if so, exchanging the configuration of the control channel resources of the first terminal and the second terminal, and updating the current EPDCCH resource allowance and the current PDCCH resource allowance;
If not, detecting whether the residual difference value between the current EPDCCH resource residual and the current PDCCH resource residual is within a preset residual difference value range.
2. The method of claim 1, wherein a number of enhanced control channel elements ECCEs represents the EPDCCH resource capacity; and if the control channel resource exists, exchanging the configuration of the control channel resources of the first terminal and the second terminal, and updating the EPDCCH resource allowance and the PDCCH resource allowance, wherein the method comprises the following steps of:
acquiring a first set of terminals with EPDCCH resources configured in the second type of terminals, acquiring a second terminal from the first set, and taking the second terminal as a current terminal;
obtaining a first ECCE number occupied by the current terminal according to the historical scheduling information of the current terminal, obtaining a current ECCE number corresponding to the current EPDCCH resource allowance, adding the first ECCE number and the current ECCE number to obtain an updated ECCE number representing the current EPDCCH resource allowance after the EPDCCH resource configured by the current terminal is removed, and taking the updated ECCE number as the current ECCE number;
judging whether the current ECCE number is smaller than a preset ECCE number threshold;
if yes, acquiring a next terminal corresponding to the current terminal from the first set, taking the next terminal as the current terminal, and entering the step of obtaining a first ECCE number occupied by the current terminal according to the historical scheduling information of the current terminal;
If not, configuring PDCCH resources from the second type terminal acquired from the first set, configuring the EPDCCH resources for the first terminal, and updating the current ECCE number and the current CCE number.
3. The method of claim 1, further comprising, after the step of updating the current EPDCCH resource headroom and the current PDCCH resource headroom:
judging whether the current updated resource allowance number reaches a preset updated resource allowance number threshold value or not;
if not, the step of detecting whether the first terminal which is not configured with the Enhanced Physical Downlink Control Channel (EPDCCH) resource exists in the first type terminal is entered, and if so, the control channel resource configuration of the terminal is ended.
4. The method according to claim 1, wherein the method further comprises:
and if the first type terminal is detected to be configured with the EPDCCH resources, detecting whether the residual difference value of the current EPDCCH resource residual and the PDCCH resource residual is within a preset residual difference value range.
5. The method of any of claims 1 or 4, wherein the step of detecting whether the margin difference between EPDCCH resource capacity and PDCCH resource capacity is within a preset margin difference range comprises:
Obtaining a current EPDCCH resource allowance and a current PDCCH resource allowance according to the historical scheduling information, and comparing the difference obtained by subtracting the current EPDCCH resource allowance from the current PDCCH resource allowance with the preset allowance difference range;
if the difference is larger than the upper limit value of the preset margin difference range, the current PDCCH resource margin is larger than the current EPDCCH resource margin, and whether a second terminal configured with EPDCCH resources exists in the second type terminal is judged;
if yes, configuring PDCCH resources for the second terminal, and updating the current EPDCCH resource allowance and the current PDCCH resource allowance;
if not, calculating the limitation of the current EPDCCH resources, and detecting whether the limitation of the current EPDCCH resources is larger than a preset EPDCCH resource limitation threshold;
ending the control channel resource allocation of the terminal if the current EPDCCH resource limitation is larger than a preset EPDCCH resource limitation threshold;
if the current EPDCCH resource limitation is smaller than or equal to a preset EPDCCH resource limitation threshold, acquiring a third terminal with the EPDCCH resource configured in the first type terminal, configuring PDCCH resource for the third terminal, and updating the current EPDCCH resource allowance and the current PDCCH resource allowance;
Judging whether the number of times of updating the resource allowance at present reaches a preset threshold value of times of updating the resource allowance;
if not, the step of obtaining the current EPDCCH resource allowance and the current PDCCH resource allowance according to the historical scheduling information is entered;
if yes, ending the control channel resource allocation to the terminal.
6. The method of claim 5, wherein the method further comprises:
if the difference value is smaller than or equal to the lower limit value of the preset margin difference value range, the current EPDCCH resource margin is larger than the current PDCCH resource margin, and the current PDCCH resource margin is obtained according to historical scheduling information;
judging whether the current PDCCH resource allowance is larger than a preset PDCCH resource allowance threshold value or not;
if yes, ending the control channel resource allocation of the terminal;
if not, a fourth terminal with PDCCH resources allocated in the second type terminal is obtained, EPDCCH resources are allocated for the fourth terminal, the current EPDCCH resource allowance and the current PDCCH resource allowance are updated, and the step of judging whether the number of times of the current updated resource allowance reaches a preset updated resource allowance number threshold is performed.
7. The method of claim 5, wherein the method further comprises:
And if the difference is greater than the lower limit value of the preset margin difference range and less than or equal to the upper limit value of the preset margin difference range, balancing the current EPDCCH resource margin and the current PDCCH resource margin, and ending the control channel resource configuration of the terminal.
8. A control channel resource allocation apparatus, the apparatus comprising:
the first detection module is used for detecting whether a first terminal which is not configured with an Enhanced Physical Downlink Control Channel (EPDCCH) resource exists in a first type of terminal, wherein the first type of terminal is a terminal with interference intensity exceeding a preset interference threshold;
the second detection module is used for acquiring the current EPDCCH resource allowance when detecting that the first terminal which is not configured with the EPDCCH resource exists in the first type terminal, and detecting whether the current EPDCCH resource allowance is larger than a preset EPDCCH resource allowance threshold value or not;
a first resource allocation module, configured to, if the current EPDCCH resource margin is greater than the preset EPDCCH resource margin threshold, allocate the EPDCCH resource for the first terminal, and update the current EPDCCH resource margin and the current PDCCH resource margin;
a third detection module, configured to detect whether a second terminal configured with EPDCCH resources exists in a second type of terminal if the current EPDCCH resource margin is smaller than the preset EPDCCH resource margin threshold, where the second type of terminal is a terminal with interference strength lower than the preset interference threshold;
A second resource allocation module, configured to exchange configurations of control channel resources of the first terminal and the second terminal, and update a current EPDCCH resource allowance and a current PDCCH resource allowance if the first resource allocation module exists;
and the fourth detection module is used for detecting whether the residual difference value between the current EPDCCH resource residual and the current PDCCH resource residual is within a preset residual difference value range or not if the residual difference value does not exist.
9. The apparatus of claim 8, wherein a number of enhanced control channel elements ECCEs represents the EPDCCH resource capacity; the second resource configuration module includes:
the acquisition module is used for acquiring a first set formed by terminals with EPDCCH resources configured in the second type terminals, acquiring a second terminal from the first set, and taking the second terminal as a current terminal;
the updating module is used for obtaining a first ECCE number occupied by the current terminal according to the historical scheduling information of the current terminal, obtaining a current ECCE number corresponding to the current EPDCCH resource allowance, adding the first ECCE number and the current ECCE number to obtain an updated ECCE number representing the current EPDCCH resource allowance after the EPDCCH resource configured by the current terminal is removed, and taking the updated ECCE number as the current ECCE number;
The detection module is used for judging whether the current ECCE number is smaller than a preset ECCE number threshold value or not;
the cyclic updating module is used for acquiring a next terminal corresponding to the current terminal from the first set if the cyclic updating module is used, taking the next terminal as the current terminal and entering the updating module;
and the resource reconfiguration module is used for configuring PDCCH resources from the second type terminal acquired from the first set, configuring the EPDCCH resources for the first terminal and updating the current ECCE number and the current CCE number if not.
10. The apparatus of claim 8, wherein the apparatus further comprises:
the first circulation judging module is used for judging whether the current updated resource allowance number reaches a preset updated resource allowance number threshold value or not; if not, entering the first detection module, and if so, ending the control channel resource allocation of the terminal.
11. The apparatus of claim 8, wherein the apparatus further comprises:
and a fifth detection module, configured to detect whether a margin difference value between the current EPDCCH resource margin and the current PDCCH resource margin is within a preset margin difference value range if it is detected that the first type terminals are configured with EPDCCH resources.
12. The apparatus according to any one of claims 8 or 11, further comprising:
the difference comparison module is used for obtaining the current EPDCCH resource allowance and the current PDCCH resource allowance according to the historical scheduling information, and comparing the difference obtained by subtracting the current EPDCCH resource allowance from the current PDCCH resource allowance with the preset allowance difference range;
a sixth detection module, configured to determine whether a second terminal configured with EPDCCH resources exists in the second type terminal if the difference is greater than an upper limit value of the preset margin difference range, and if the current PDCCH resource margin is greater than the current EPDCCH resource margin;
a third resource allocation module, configured to allocate PDCCH resources for the second terminal if the second terminal exists, and update a current EPDCCH resource allowance and a current PDCCH resource allowance;
a seventh detection module, configured to calculate a current EPDCCH resource limitation if the current EPDCCH resource limitation does not exist, and detect whether the current EPDCCH resource limitation is greater than a preset EPDCCH resource limitation threshold;
a first ending module, configured to end control channel resource allocation for the terminal if the current EPDCCH resource limitation is greater than a preset EPDCCH resource limitation threshold;
A fourth resource configuration module, configured to obtain a third terminal configured with EPDCCH resources in the first type terminal if the current EPDCCH resource limitation is less than or equal to a preset EPDCCH resource limitation threshold, configure PDCCH resources for the third terminal, and update a current EPDCCH resource allowance and a current PDCCH resource allowance;
and the second circulation judging module is used for judging whether the number of times of the current updated resource allowance reaches a preset updated resource allowance number threshold, if not, entering a difference comparison module, and if so, ending the control channel resource allocation of the terminal.
13. The apparatus of claim 12, wherein the apparatus further comprises:
an eighth detection module, configured to, if the difference value is less than or equal to a lower limit value of the preset margin difference range, obtain the current PDCCH resource margin according to historical scheduling information, and determine whether the current PDCCH resource margin is greater than a preset PDCCH resource margin threshold;
the second ending module is used for ending the control channel resource allocation to the terminal if yes;
and a fifth resource allocation module, configured to obtain a fourth terminal configured with PDCCH resources in the second type terminal if not, configure EPDCCH resources for the fourth terminal, update a current EPDCCH resource allowance and a current PDCCH resource allowance, and enter a second cycle determination module.
14. The apparatus of claim 12, wherein the apparatus further comprises:
and a third ending module, configured to, if the difference is greater than the lower limit value of the preset margin difference range and less than or equal to the upper limit value of the preset margin difference range, balance the current EPDCCH resource margin with the current PDCCH resource margin, and end control channel resource allocation for the terminal.
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