CN109842948B - Enhanced control channel resource allocation method and device for 3D-MIMO base station - Google Patents
Enhanced control channel resource allocation method and device for 3D-MIMO base station Download PDFInfo
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Abstract
The invention provides an enhanced control channel resource allocation method and equipment for a 3D-MIMO base station. The method comprises the following steps: when the throughput of the 3D-MIMO base station changes, if the ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate are judged to meet a first preset condition, the ePDCCH resource allocation is newly added; if the ePDCCH resource utilization rate meets a second preset condition, reducing ePDCCH resource allocation; and if the ePDCCH resource utilization rate meets a third preset condition, maintaining the current ePDCCH resource configuration. According to the method and the device, the maximization of the throughput of the 3D-MIMO base station is taken as a target, the configuration of newly adding ePDCCH resources and reducing ePDCCH resources is carried out according to the utilization rate of the ePDCCH resources, the ePDCCH resources are dynamically configured, and the improvement of the utilization rate of the 3D-MIMO base station is facilitated.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to an enhanced control channel resource allocation method and device for a 3D-MIMO base station.
Background
According to the 3GPP protocol, each Downlink subframe of LTE is divided into a Control region and a data region, as shown in fig. 1, where the Control region occupies 1 to 4 OFDM symbols (4 OFDM symbols are occupied when the bandwidth is 1.4 MHz), and is composed of pdcch (physical Downlink Control channel), phich (physical Hybrid ARQ Indicator channel), pcfich (physical Control Indicator channel), and rs (reference signal). The PDCCH is used for transmitting common control information such as system messages and paging messages and user-specific information such as downlink resource allocation indication, random access response, uplink power control and uplink authorization; the PDCCH is transmitted over one or more CCEs (control channel elements), each CCE contains 9 REGs (resource element groups), and each REG contains 4 res (resource elements). It can be seen that the channel capacity of the PDCCH is fixed due to the limitation of time-frequency resources.
Considering factors such as possible limited capacity of a control channel, 3GPP defines an enhanced downlink control channel (enhanced PDCCH) that occupies a PDSCH as a control channel, and according to sections 36.300-5.1.3 of the 3GPP protocol, ePDCCH carries a user-specific signal (i.e. only a user-specific search space) and has the same function as the PDCCH, thereby expanding the control channel resources.
At present, a Massive antenna array Multiple-Input-Multiple-output (Massive MIMO) technology expands the existing MIMO technology through Massive Antennas, so as to significantly improve the capacity and reliability of a wireless system, which is one of 5G key technologies, and considers that the Massive Antennas expand the spatial resolution, and the Massive antenna technology is also referred to as 3D-MIMO in the industry.
The 3GPP protocol 36.213-7.1 specifies that there are 10 TM (transmission mode) supported by PDSCH, wherein TM9, TM10 support PDSCH transmission layer number up to 8, i.e. support parallel transmission of 8 UE data on the same RB, which presupposes channel orthogonalization among multiple UEs. Due to the fact that large-scale antennas are configured in the 3D-MIMO, the beam space resolution is improved, multi-layer data parallel transmission is better supported, and the throughput is improved.
According to the above, the design of the 3D-MIMO base station is intended to improve the throughput of a single station, and TM9 and TM10 supported by the protocol greatly improve the PDSCH capacity. However, for PDCCH, the 3GPP protocol lacks the functional definition of spatial multiplexing, and thus PDSCH resource redundancy and CCE limited scenarios will occur in some scenarios. For the ePDCCH, the protocol only proposes to configure ePDCCH resources (sections 36.213-9.1.1) by a high layer, and does not define the resource configuration method of the ePDCCH, so that the 3D-MIMO lacks a configuration method of control channel and service channel resources; especially, when the control channel and the traffic channel realize resource sharing, how to balance the resource requirement between the control channel and the traffic channel to realize the carrier benefit maximization (throughput maximization) becomes a problem to be solved urgently.
In summary, the prior art lacks an effective dynamic configuration method for controlling channel resources and traffic channel resources, and cannot achieve the maximization of the throughput of the 3D-MIMO base station.
Disclosure of Invention
Embodiments of the present invention provide an enhanced control channel resource method and apparatus for a 3D-MIMO base station that overcomes or at least partially solves the above-mentioned problems.
According to an aspect of the embodiments of the present invention, there is provided an enhanced control channel resource allocation method for a 3D-MIMO base station, including:
when the throughput of the 3D-MIMO base station changes, if the ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate are judged to meet a first preset condition, the ePDCCH resource allocation is newly added;
and if the ePDCCH resource utilization rate meets a second preset condition, reducing ePDCCH resource allocation.
According to another aspect of the embodiments of the present invention, there is also provided an apparatus for configuring enhanced control channel resources of a 3D-MIMO base station, including a resource increasing module and a resource decreasing module;
the resource increasing module is used for increasing ePDCCH resource configuration newly if the ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate are judged to meet a first preset condition when the throughput of the 3D-MIMO base station changes;
and the resource reducing module is used for reducing the ePDCCH resource configuration if the ePDCCH resource utilization rate meets a second preset condition.
According to another aspect of the embodiments of the present invention, there is also provided an enhanced control channel resource configuration device of a 3D-MIMO base station, including:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, and the processor calls the program instructions to perform the method for configuring enhanced control channel resources of a 3D-MIMO base station and the method of any optional embodiment of the present invention.
According to another aspect of the embodiments of the present invention, there is provided a non-transitory computer-readable storage medium, which stores computer instructions, the computer instructions causing the computer to execute the method for configuring enhanced control channel resources of a 3D-MIMO base station and the method of any optional embodiment thereof.
The embodiment of the invention provides an enhanced control channel resource allocation method of a 3D-MIMO base station, which takes the maximization of the throughput of the 3D-MIMO base station as a target, judges the newly added ePDCCH resource and reduces the allocation of the ePDCCH resource according to the utilization rate of the ePDCCH resource, realizes the dynamic allocation of the ePDCCH resource and is beneficial to the maximization of the utilization rate of the 3D-MIMO base station.
Drawings
Fig. 1 is a schematic diagram of a control region of a prior art LTE subframe;
FIG. 2 is a flowchart illustrating a method for enhanced control channel resources of a 3D-MIMO base station according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a framework of an enhanced control channel resource device of a 3D-MIMO base station according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As described above, 3GPP defines an enhanced downlink control channel ePDCCH, and according to section 36.211-6.8a.1 of 3GPP, the ePDCCH is aggregated and transmitted by one or more ecces (enhanced cces), each eCCE is composed of multiple eregs (enhanced regs) as detailed in table 1 and table 2, and an ePDCCH space searched by a UE is issued by a high-level instruction (section 36.213-9.1.3).
TABLE 1 eREG number contained per eCCE
Table 2 number of ecces aggregated by ePDCCH in different formats
As mentioned above, 3GPP protocol 36.213-7.1 table 7.1-5 specifies that there are 10 TM (transmission mode) supported by PDSCH, where TM9, TM10 support PDSCH transmission layer number up to 8, i.e. support parallel transmission of 8 UE data on the same RB, as shown in table 3.
Table 3 PDSCH supported transmission modes
According to the above information, the existing control channel configuration of 3D-MIMO (maximum 3 symbols are allocated as control channels under large bandwidth, and ePDCCH resource configuration is issued by higher layers) has two disadvantages. First, for a user-dense scenario, CCE or eCCE congestion is prone to occur, resulting in throughput degradation. Secondly, for a scenario with a high ratio of packet services, because ePDCCH occupies PDSCH resources, control channel resource redundancy and PDSCH resources are possibly insufficient, and user traffic cannot be effectively absorbed.
Aiming at the defects of the prior art, the embodiment of the invention provides an enhanced downlink control channel resource allocation method for realizing the maximization of 3D-MIMO throughput, which aims at the maximization of the throughput of a 3D-MIMO base station and provides parameters and a process for switching allocation between PDSCH and ePDCCH resources.
Fig. 2 is a schematic flow chart of a method for allocating resources of an enhanced control channel of a 3D-MIMO base station according to an embodiment of the present invention, and as shown in fig. 2, the method for allocating resources of an enhanced control channel of a 3D-MIMO base station includes:
s100, when the throughput of the 3D-MIMO base station changes, if the ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate are judged to meet a first preset condition, the ePDCCH resource allocation is newly added;
s200, if the ePDCCH resource utilization rate meets a second preset condition, reducing ePDCCH resource allocation.
The execution subject of the embodiment of the invention is the base station. In order to perform the above configuration, the embodiment of the present invention first needs to detect the throughput of the 3D-MIMO base station, and detect the current ePDCCH resource utilization rate, PDSCH resource utilization rate, and PDCCH resource utilization rate. And determining the change of the throughput of the 3D-MIMO base station, the current ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate according to the detection result.
On the basis, judgment is carried out according to the detection result, and ePDCCH resource allocation is newly added when a certain condition, namely a first preset condition, is met.
Only one judgment condition for reducing the ePDCCH resource configuration is needed, namely the utilization rate of the ePDCCH resources meets a second preset condition.
According to the actual situation of the base station configuration, the first preset condition is that the ePDCCH resource configuration actually needs to be increased, and the second preset condition is that the ePDCCH resource configuration actually needs to be decreased.
The embodiment of the invention provides an enhanced control channel resource allocation method of a 3D-MIMO base station, which takes the maximization of the throughput of the 3D-MIMO base station as a target, judges the newly added ePDCCH resource and reduces the allocation of the ePDCCH resource according to the utilization rate of the ePDCCH resource, realizes the dynamic allocation of the ePDCCH resource and is beneficial to the maximization of the utilization rate of the 3D-MIMO base station.
Based on the above embodiment, the method for enhancing control channel resources of a 3D-MIMO base station further includes:
s300, when the throughput of the 3D-MIMO base station changes, if the ePDCCH resource utilization rate meets a third preset condition, maintaining the current ePDCCH resource configuration.
The foregoing embodiment describes a situation of newly increasing ePDCCH resources and reducing ePDCCH resources, and the embodiment of the present invention describes a situation of maintaining current ePDCCH resource configuration, and according to an actual situation of base station configuration, the third preset condition is a situation that ePDCCH resource configuration can be actually maintained. The current ePDCCH resource configuration can be maintained on the existing basis regardless of the improvement or reduction of the throughput of the 3D-MIMO base station, and the configuration of increasing the ePDCCH resource and reducing the ePDCCH resource is not needed.
In the embodiment of the present invention, there is no chronological relationship among steps S100, S200, and S300, and S100, S200, and S300 only play a role of identification. In general, these three steps can be performed in any alternating manner.
In an optional embodiment, in step S100, when the throughput of the 3D-MIMO base station changes, if it is determined that the ePDCCH resource utilization rate, the PDSCH resource utilization rate, and the PDCCH resource utilization rate satisfy the first preset condition, newly adding the ePDCCH resource configuration specifically includes:
when the throughput of the 3D-MIMO base station is improved or reduced, judging whether the ePDCCH resource utilization rate reaches an ePDCCH threshold upper limit, whether the PDCCH resource utilization rate exceeds a PDCCH threshold and whether the PDSCH resource utilization rate exceeds a PDSCH threshold;
and if the judgment shows that the ePDCCH resource utilization rate reaches the ePDCCH threshold upper limit, the PDCCH resource utilization rate exceeds the PDCCH threshold and the PDSCH resource utilization rate does not exceed the PDSCH threshold, newly adding ePDCCH resources of a plurality of PRB pairs.
In the embodiment of the present invention, if the throughput of the 3D-MIMO base station is increased or decreased and the ePDCCH resource utilization reaches the ePDCCH threshold upper limit, the following two cases may be described:
if the throughput of the 3D-MIMO base station is improved and the utilization rate of ePDCCH resources reaches the ePDCCH threshold upper limit, the newly added eCCE resources effectively absorb users, the newly added ePDCCH resources are required, and the eCCE resources are limited.
And if the throughput of the 3D-MIMO base station is reduced and the utilization rate of ePDCCH resources reaches the ePDCCH threshold upper limit, indicating that eCCE resources are limited.
Based on the two situations, whether the PDCCH resource utilization rate exceeds the PDCCH threshold and whether the PDSCH resource utilization rate exceeds the PDSCH threshold needs to be further judged to determine whether the ePDCCh resource needs to be newly added. The conditions for adding the ePDCCH resource are as follows: the PDCCH resource utilization rate exceeds a PDCCH threshold, and the PDSCH resource utilization rate does not exceed the PDSCH threshold; when the condition is met, adding ePDCCH resources of a plurality of PRB pairs; preferably, the ePDCCH resources of the plurality of PRB pairs are ePDCCH resources of 1 PRB pair.
Specifically, the first preset condition is as follows: the ePDCCH resource utilization rate reaches the ePDCCH threshold upper limit, the PDCCH resource utilization rate exceeds the PDCCH threshold, and the PDSCH resource utilization rate does not exceed the PDSCH threshold.
Before the embodiment of the present invention performs the above determination, it is necessary: setting an ePDCCH threshold upper limit, an ePDCCH threshold lower limit, a PDCCH threshold and a PDSCH threshold.
The ePDCCH threshold upper limit is a maximum value that the ePDCCH resource utilization rate can reach, the ePDCCH threshold lower limit is a minimum value that the ePDCCH resource utilization rate must reach, and the specific ePDCCH threshold upper limit and the ePDCCH threshold lower limit may be configured according to actual conditions such as site services, devices, and the like, which is not limited in the embodiments of the present invention. The PDCCH threshold and PDSCH threshold may be configured according to actual conditions such as site service and device, which are not limited in the embodiments of the present invention
In an optional embodiment, the determining whether the ePDCCH resource utilization reaches an ePDCCH threshold upper limit, whether the PDCCH resource utilization exceeds a PDCCH threshold, and whether the PDSCH resource utilization exceeds a PDSCH threshold, before further includes:
if the number of users supporting the ePDCCH is 0, closing the ePDCCH; otherwise, the ePDCCH is started.
The embodiment of the invention can be described as closing the ePDCCH if no ePDCCH user exists, and only opening the ePDCCH if the ePDCCH user exists.
Based on the above embodiments, whether to newly add ePDCCH resource allocation in the embodiments of the present invention includes a first layer decision and a second layer decision.
The first layer decision comprises:
if the throughput is improved, the utilization rate of the ePDCCH reaches the upper limit of the threshold, which shows that the newly added eCCE resource effectively absorbs the user, and the eCCE resource is required and limited, the judgment of whether the newly added eCCE resource is added or not is obtained according to the judgment of the second layer.
And if the throughput is reduced, the utilization rate of the ePDCCH reaches the upper limit of the threshold, which shows that the eCCE resources are limited, judging whether to increase the ePDCCH resources or not according to the second layer.
The second layer decision comprises the steps of:
(1) if the number of the supported ePDCCH users is larger than 0, the ePDCCH is opened, and if the number of the supported ePDCCH users is not larger than 0, the ePDCCH is closed.
(2) And if the PDSCH utilization rate exceeds the threshold, no ePDCCH resource is newly configured.
(3) If the PDCCH utilization rate exceeds the threshold (indicating that CCE resources are insufficient), and when the PDSCH utilization rate does not exceed the threshold, newly configuring 1 PRB pair as ePDCCH resources.
In an optional embodiment, in step S200, if the ePDCCH resource utilization rate satisfies the second preset condition, reducing the ePDCCH resource configuration specifically includes:
and if the PDCCH utilization rate is lower than the threshold lower limit of the ePDCCH, reducing ePDCCH resources of a plurality of PRB pairs.
The embodiment of the invention reduces the judgment of ePDCCH resources, and the condition is that the PDCCH utilization rate is lower than the threshold lower limit of the ePDCCH; reducing ePDCCH resources of a plurality of PRB pairs each time; preferably, the ePDCCH resources of the plurality of PRB pairs are ePDCCH resources of 1 PRB pair.
Specifically, the second preset condition is as follows: the PDCCH utilization rate is lower than the threshold lower limit of the ePDCCH.
In an optional embodiment, in step S300, if the throughput of the 3D-MIMO base station changes and the ePDCCH resource utilization rate meets a third preset condition, maintaining the current ePDCCH resource configuration specifically includes:
if the throughput of the 3D-MIMO base station is improved and the ePDCCH resource utilization rate does not reach the upper limit of the threshold, maintaining the current ePDCCH resource configuration;
if the throughput of the 3D-MIMO base station is reduced and the ePDCCH resource utilization rate is not lower than the lower limit of the threshold, maintaining the current ePDCCH resource configuration;
and if the throughput of the 3D-MIMO base station is reduced and the ePDCCH resource utilization rate does not reach the upper limit of the threshold, maintaining the current ePDCCH resource configuration.
The embodiment of the invention maintains the current ePDCCH resource configuration, and can maintain the current ePDCCH resource configuration when the ePDCCH resource utilization rate is between the ePDCCH threshold upper limit and the ePDCCH threshold lower limit on the whole; if the throughput is reduced and the utilization rate of the ePDCCH resources does not reach the upper limit of the threshold, it is indicated that the reduction of the throughput is caused by the change of user data behaviors, but not caused by insufficient resources of the control channel, and the ePDCCH resource configuration is maintained unchanged.
Specifically, the third preset condition is as follows: and the ePDCCH resource utilization rate is between the ePDCCH threshold upper limit and the ePDCCH threshold lower limit.
In summary, the embodiments of the present invention provide a method for dynamically configuring enhanced control channel resources of a 3D-MIMO station, which is beneficial to maximize throughput of a base station, by detecting and determining a shared channel, a control channel utilization rate, an enhanced control channel utilization rate, and throughput, and compared with the prior art, the method has the following beneficial effects:
(1) the technical characteristics that the PDSCH of the 3D-MIMO base station has larger capacity and the PDCCH is easy to become a bottleneck of limited capacity are considered, the ePDCCH resource can be occupied by combining the characteristic that the ePDCCH can occupy PDSCH resources, the ePDCCH resources are dynamically configured by detecting a plurality of parameters, and the problem of mismatching of the PDSCH and the PDCCH resources is solved.
(2) And on the basis of improvement or reduction of throughput, resource allocation judgment is carried out according to whether the ePDCCH, the PDCCH and the PDSCH are higher than or lower than a threshold, so that the utilization rate of the 3D-MIMO base station is maximized.
The following illustrates beneficial effects by calculating specific data according to the enhanced control channel resource allocation method of the 3D-MIMO base station in the embodiment of the present invention.
Taking CFI equal to 3, that is, PDCCH occupies 3 symbols as an example, taking PHICH group number as 3, removing REs occupied by RS, PHICH, and PCFICH, the number of available CCEs for PDCCH in 1 ms is (3600-16-12-400)/36 equal to 88 (each symbol has 1200 REs), assuming that each user is scheduled to occupy CCE of 3 on average, and considering only downlink scheduling, the number of schedulable users per ms is 88/3 equal to 29.
Assuming that the average downlink throughput of a cell is 40Mbps, the downlink throughput per millisecond is 40Kbps, and assuming that the average number of scheduled users per millisecond is 15, the user rate per user per millisecond is about 40/15 ≈ 2.6 Kbps.
Suppose the average utilization of the PDSCH of the cell is 40%, the threshold of the PDSCH utilization is 50%, and the PDCCH reaches the threshold. Assuming that the cell is a user-intensive scene, according to the configuration method, 10% of PDSCH resources can be configured as ePDCCH, and if the number of REs occupied by RS is ignored, about 1200/36 ≈ 33 ecces (general CPs) can be configured, and if the average number of CCEs occupied by each user scheduling is 3, newly added ePDCCH resources can be obtained to increase the number of users scheduled by the cell by 33/3 ═ 11.
The downlink throughput of the cell per millisecond is increased to: 2.6Kbps 11 ═ 28.6Kbps, i.e., the downlink throughput per second increased by 28.6Mbps, i.e., the downlink throughput per second increased from 40Mbps to 68.6 Mbps.
Since the 3D-MIMO station does not have a large amount of current network statistics (such as average throughput, etc.), the above example calculation does not consider the following factors:
(1)3D-MIMO due to higher spatial resolution of the beams, the CCE or eCCE aggregation level of the medium and far point users may be reduced, thereby reducing the average CCE or eCCE aggregation level, and thus may accommodate more users.
(2)3D-MIMO may have higher traffic per user in high traffic scenarios, especially high traffic big packet traffic scenarios, due to the larger capacity of PDSCH.
If the two factors are further considered on the basis of the above example, it can be reasonably deduced that the actual effect of the enhanced control channel resource allocation method of the 3D-MIMO base station according to the embodiment of the present invention is better.
The embodiment of the invention also provides an enhanced control channel resource allocation device of the 3D-MIMO base station, which comprises a resource increasing module and a resource reducing module;
the resource increasing module is used for increasing ePDCCH resource configuration newly if the ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate are judged to meet a first preset condition when the throughput of the 3D-MIMO base station changes;
and the resource reducing module is used for reducing the ePDCCH resource configuration if the ePDCCH resource utilization rate meets a second preset condition.
The enhanced control channel resource allocation device of the 3D-MIMO base station also comprises a resource maintaining module;
and the resource maintaining module is used for judging and maintaining the ePDCCH resource configuration if the ePDCCH resource utilization rate is between the ePDCCH threshold upper limit and the ePDCCH threshold lower limit.
The apparatus of the embodiment of the present invention may be used to implement the technical solution of the enhanced control channel resource allocation method embodiment of the 3D-MIMO base station shown in fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 3 is a schematic diagram of a framework of an enhanced control channel resource configuration device of a 3D-MIMO base station according to an embodiment of the present invention. Referring to fig. 3, the apparatus includes: a processor (processor)601, a memory (memory)602, and a bus 603; wherein, the processor 601 and the memory 602 complete the communication with each other through the bus 603;
the processor 601 is configured to call program instructions in the memory 602 to perform the methods provided by the above-mentioned method embodiments, for example, including: when the throughput of the 3D-MIMO base station changes, if the ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate are judged to meet a first preset condition, the ePDCCH resource allocation is newly added; and if the ePDCCH resource utilization rate meets a second preset condition, reducing ePDCCH resource allocation.
Another embodiment of the present invention discloses a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-mentioned method embodiments, for example, including: when the throughput of the 3D-MIMO base station changes, if the ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate are judged to meet a first preset condition, the ePDCCH resource allocation is newly added; and if the ePDCCH resource utilization rate meets a second preset condition, reducing ePDCCH resource allocation.
Another embodiment of the invention provides a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform a method provided by the above method embodiments, for example, comprising: when the throughput of the 3D-MIMO base station changes, if the ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate are judged to meet a first preset condition, the ePDCCH resource allocation is newly added; and if the ePDCCH resource utilization rate meets a second preset condition, reducing ePDCCH resource allocation.
Those of ordinary skill in the art will understand that: the implementation of the above-described apparatus embodiments or method embodiments is merely illustrative, wherein the processor and the memory may or may not be physically separate components, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. An enhanced control channel resource allocation method for a 3D-MIMO base station, comprising:
when the throughput of the 3D-MIMO base station changes, if the ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate are judged to meet a first preset condition, the ePDCCH resource allocation is newly added;
if the ePDCCH resource utilization rate meets a second preset condition, reducing ePDCCH resource allocation;
when the throughput of the 3D-MIMO base station changes, if it is determined that the ePDCCH resource utilization rate, the PDSCH resource utilization rate, and the PDCCH resource utilization rate satisfy a first preset condition, newly adding ePDCCH resource allocation, specifically including:
when the throughput of the 3D-MIMO base station is improved or reduced, judging whether the ePDCCH resource utilization rate reaches an ePDCCH threshold upper limit, whether the PDCCH resource utilization rate exceeds a PDCCH threshold and whether the PDSCH resource utilization rate exceeds a PDSCH threshold;
and if the judgment shows that the ePDCCH resource utilization rate reaches the ePDCCH threshold upper limit, the PDCCH resource utilization rate exceeds the PDCCH threshold and the PDSCH resource utilization rate does not exceed the PDSCH threshold, newly adding ePDCCH resources of a plurality of PRB pairs.
2. The method of claim 1, further comprising:
and when the throughput of the 3D-MIMO base station is changed, if the ePDCCH resource utilization rate meets a third preset condition, maintaining the current ePDCCH resource configuration.
3. The method of claim 1, wherein the determining whether the ePDCCH resource utilization reaches an ePDCCH threshold upper limit, whether the PDCCH resource utilization exceeds a PDCCH threshold, and whether the PDSCH resource utilization exceeds a PDSCH threshold, further comprises:
if the number of users supporting the ePDCCH is 0, closing the ePDCCH; otherwise, the ePDCCH is started.
4. The method according to claim 1, wherein if the ePDCCH resource utilization satisfies a second preset condition, reducing ePDCCH resource allocation specifically includes:
and if the PDCCH utilization rate is lower than the threshold lower limit of the ePDCCH, reducing ePDCCH resources of a plurality of PRB pairs.
5. The method of claim 2, wherein if the throughput of the 3D-MIMO base station changes and the ePDCCH resource utilization satisfies a third preset condition, maintaining the current ePDCCH resource configuration specifically includes:
if the throughput of the 3D-MIMO base station is improved and the ePDCCH resource utilization rate does not reach the upper limit of the threshold, maintaining the current ePDCCH resource configuration;
if the throughput of the 3D-MIMO base station is reduced and the ePDCCH resource utilization rate is not lower than the lower limit of the threshold, maintaining the current ePDCCH resource configuration;
and if the throughput of the 3D-MIMO base station is reduced and the ePDCCH resource utilization rate does not reach the upper limit of the threshold, maintaining the current ePDCCH resource configuration.
6. The method according to claim 5, wherein the ePDCCH resources of the plurality of PRB pairs are specifically: ePDCCH resources of 1 PRB pair.
7. An enhanced control channel resource allocation device of a 3D-MIMO base station is characterized by comprising a resource increasing module and a resource reducing module;
the resource increasing module is used for increasing ePDCCH resource configuration newly if the ePDCCH resource utilization rate, the PDSCH resource utilization rate and the PDCCH resource utilization rate are judged to meet a first preset condition when the throughput of the 3D-MIMO base station changes;
the resource reducing module is used for reducing the ePDCCH resource configuration if the ePDCCH resource utilization rate meets a second preset condition;
wherein the resource increasing module is configured to:
when the throughput of the 3D-MIMO base station is improved or reduced, judging whether the ePDCCH resource utilization rate reaches an ePDCCH threshold upper limit, whether the PDCCH resource utilization rate exceeds a PDCCH threshold and whether the PDSCH resource utilization rate exceeds a PDSCH threshold;
and if the judgment shows that the ePDCCH resource utilization rate reaches the ePDCCH threshold upper limit, the PDCCH resource utilization rate exceeds the PDCCH threshold and the PDSCH resource utilization rate does not exceed the PDSCH threshold, newly adding ePDCCH resources of a plurality of PRB pairs.
8. An enhanced control channel resource allocation device of a 3D-MIMO base station, comprising:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 6.
9. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1 to 6.
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