CN111083790B - Scheduling control method and device - Google Patents
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application discloses a scheduling control method and a device, wherein the method comprises the steps that when an enhanced machine communication (eMTC) cell arrives at each preset control cycle, whether an eMTC mode B user can be scheduled in the control cycle is determined according to an overload indication OI of an adjacent cell; and controlling the scheduling of the eMTC mode B user in the control period according to the determined result. By adopting the method and the device, the problems of coverage and capacity reduction caused by the interference of the eMTC terminal to the LTE broadband cluster can be solved.
Description
Technical Field
The present invention relates to mobile communication technologies, and in particular, to a scheduling control method and apparatus.
Background
In a private network broadband cluster network, enhanced machine communication (eMTC) characteristics need to be deployed to carry services with characteristics of the internet of things in various private networks.
The maximum bandwidth supported by the eMTC customer premise equipment (UE) is 1.4MHz, that is, the bandwidth corresponding to the maximum 6RB, the maximum uplink/downlink TBS are 1000, the number of antennas is 1, and the maximum uplink transmit power is 20dBm (optional).
Because the baseband and radio frequency bandwidth of the eMTC UE are 1.4MHz, 3GPP defines non-overlapping continuous 6 PRBs as a narrow band (narrow band, NB for short), the system bandwidth is divided into a plurality of NBs, and the scheduling of the eMTC UE is limited by the NB and cannot be scheduled across the NB.
In order to take the Coverage depth and capacity performance of eMTC UEs into account, the 3GPP protocol introduces a Coverage Enhancement class (CE for short). 4 different coverage levels (CE Level 0-3) are divided in an idle state, and different coverage levels can be selected by the eMTC UE in the idle state according to actually measured RSRP. For the connected state, two coverage modes of CE Mode A and CE Mode B are divided, a corresponding mapping relation exists between the coverage level of the idle state and the coverage Mode of the connected state, and the overhead can be greatly saved through differential management of different coverage levels.
eMTC features are currently generally deployed on private network LTE broadband clusters. In order to ensure deep coverage, the eMTC protocol specifies that, for eMTC UEs in CE Mode B, maximum transmission power is used for transmission, which may generate large interference to the private network LTE, resulting in reduced capacity and coverage.
Disclosure of Invention
In view of this, the present invention mainly aims to provide a scheduling control method and apparatus, which can solve the problems of coverage and capacity reduction caused by the interference of an eMTC terminal to an LTE broadband cluster.
In order to achieve the above purpose, the embodiment of the present invention provides a technical solution:
a scheduling control method, comprising:
when each preset control cycle arrives, the enhanced machine type communication (eMTC) cell determines whether the control cycle can schedule an eMTC mode B user or not according to the overload indication OI of the adjacent cell;
and controlling the dispatching of the eMTC mode B user in the control period according to the determined result.
Preferably, the control period is determined whether the eMTC mode B user can be scheduled according to the overload indication OI of the adjacent cell;
x1, judging whether an adjacent area meets a first condition or not, wherein the first condition is that the grade of the overload indication exceeds a preset threshold; if yes, executing step x2, otherwise executing step x 6;
x2, the eMTC cell judges whether the resource block utilization rate of the eMTC mode B user of the cell is larger than a preset high resource utilization rate threshold, if so, the step x3 is executed, otherwise, the step x6 is executed;
x3, acquiring load information of each adjacent cell meeting the first condition, and judging whether the adjacent cell meets a preset low-load condition or not according to the load information;
x4, if at least one neighbor cell in the neighbor cells meeting the first condition meets the low load condition, executing a step x5, otherwise, executing a step x 6;
x5, judging that the control period can not schedule eMTC mode B users;
x6, it is determined that the control period can schedule eMTC mode B users.
Preferably, the low load condition is that the number of users in the cell is less than a preset low user number threshold and/or the resource block utilization rate of the cell is less than a preset low resource utilization threshold.
Preferably, the controlling, according to the determined result, the scheduling of the eMTC mode B user in the control period includes:
and if determining that the eMTC mode B user can be scheduled, allowing the eMTC mode B user to be scheduled in the control period, otherwise, not scheduling the eMTC mode B user in the control period.
A scheduling control device is arranged in a base station where an enhanced machine communication (eMTC) cell is located, and comprises:
the judging unit is used for determining whether the control cycle can schedule the eMTC mode B user or not according to the overload indication OI of the adjacent cell when each preset control cycle arrives;
and the control unit is used for controlling the scheduling of the eMTC mode B user in the control period according to the determined result.
Preferably, the determining unit, configured to determine whether the control period can schedule the eMTC mode B user, includes:
x1, judging whether an adjacent area meets a first condition or not, wherein the first condition is that the grade of the overload indication exceeds a preset threshold; if yes, executing step x2, otherwise executing step x 6;
x2, the eMTC cell judges whether the resource block utilization rate of the eMTC mode B user of the cell is larger than a preset high resource utilization rate threshold, if so, the step x3 is executed, otherwise, the step x6 is executed;
x3, acquiring load information of each adjacent cell meeting the first condition, and judging whether the adjacent cell meets a preset low-load condition or not according to the load information;
x4, if at least one neighbor cell in the neighbor cells meeting the first condition meets the low load condition, executing a step x5, otherwise, executing a step x 6;
x5, judging that the control period can not schedule eMTC mode B users;
x6, it is determined that the control period can schedule eMTC mode B users.
Preferably, the low load condition is that the number of users in the cell is less than a preset low user number threshold and/or the resource block utilization rate of the cell is less than a preset low resource utilization threshold.
Preferably, the control unit is configured to allow the eMTC mode B user to be scheduled in the present control period if it is determined that the eMTC mode B user can be scheduled, and otherwise, not schedule the eMTC mode B user in the present control period.
A scheduling apparatus, comprising:
a memory; and a processor coupled to the memory, the processor configured to perform the method embodiments as described above based on instructions stored in the memory.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the above-mentioned method embodiments.
In summary, according to the scheduling control method and apparatus provided by the present invention, when each preset control period arrives, based on the overload indication OI in the neighboring cell, the timing at which interference needs to be reduced is determined, and system interference is reduced by limiting scheduling of the eMTC mode B user, so that the problems of coverage and capacity reduction caused by interference of the eMTC terminal to the LTE broadband cluster can be solved.
Drawings
FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a specific implementation flow of step 101 in FIG. 1;
fig. 3 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The core idea of the invention is as follows: and controlling the scheduling of eMTC users according to the interference and load degree of the adjacent LTE cell so as to reduce the interference of the eMTC terminal to the LTE broadband cluster.
Fig. 1 is a schematic flowchart of a method according to an embodiment of the present invention, and as shown in fig. 1, a scheduling control method implemented by the embodiment mainly includes:
The step is used for determining whether the control period can schedule the eMTC mode B user according to the Overload Indication (OI) of the adjacent cell so as to reduce the influence of the eMTC mode B user on the network performance.
The control period may be set by those skilled in the art according to actual needs, and in order to reduce control overhead, the control period may be set to be longer than the scheduling period, for example, may be set to be 2 seconds, but is not limited thereto.
Preferably, as shown in fig. 2, in this step, the following method may be adopted to determine whether the control period may schedule the eMTC mode B user according to the OI of the neighboring cell:
Here, if no neighboring cell satisfies the first condition, it means that the network performance is better at this time, and a normal scheduling process is performed, and when there is a neighboring cell satisfying the first condition, it needs to consider whether it is possible to improve the communication quality of the neighboring cell user by controlling the scheduling of the cell eMTC mode B user, and at this time, it needs to go to step 1012.
In this step, if it is determined that the resource block utilization rate of the eMTC mode B user of the cell is greater, that is, higher than the high resource utilization threshold, it indicates that the eMTC mode B user of the cell may interfere with the neighboring cell, and further verification needs to be performed on this according to the load condition of the neighboring cell, that is, step 1013 is performed, otherwise, it indicates that the level of the neighboring cell OI is higher than that of the eMTC mode B user of the cell, and step 1016 is performed at this time, the scheduling of the eMTC mode B user is not controlled.
The high resource utilization threshold is used to determine whether the resource utilization is too high, and may be specifically set by a person skilled in the art according to actual needs.
And 1013, for each adjacent cell meeting the first condition, obtaining load information of the adjacent cell, and judging whether the adjacent cell meets a preset low-load condition according to the load information.
In this step, it needs to further determine whether the neighboring cell with high OI level is low-load, if yes, it indicates that the high OI level is caused by the interference of its neighboring cell, and at this time, the eMTC cell needs to reduce the interference to the neighboring cell by limiting the scheduling of the eMTC mode B user; otherwise, the above restriction is not required.
Preferably, the low load condition may be that the number of users in a cell is smaller than a preset low user number threshold, and/or the resource block utilization rate of the cell is smaller than a preset low resource utilization rate threshold.
The threshold of low resource utilization and the threshold of low user number are used to measure whether the cell load is low, and may be specifically set by a person skilled in the art according to actual needs.
And step 102, controlling the dispatching of the eMTC mode B user in the control period according to the determined result.
Preferably, the following method may be adopted in this step to control scheduling of the eMTC mode B user in this control period according to the result of the determination:
and if determining that the eMTC mode B user can be scheduled, allowing the eMTC mode B user to be scheduled in the control period, otherwise, not scheduling the eMTC mode B user in the control period.
According to the method and the device, when each preset control period arrives, the timing of interference reduction is determined based on the overload indication OI of the adjacent cell, and the system interference is reduced by limiting the scheduling of the eMTC mode B user, so that the problems of coverage and capacity reduction caused by the interference of the eMTC terminal to an LTE broadband cluster can be solved.
Fig. 3 is a schematic structural diagram of a scheduling control apparatus corresponding to the foregoing method, the apparatus is disposed in a base station where an enhanced machine-type communication eMTC cell is located, and as shown in fig. 3, the apparatus includes:
the judging unit is used for determining whether the control cycle can schedule the eMTC mode B user or not according to the overload indication OI of the adjacent cell when each preset control cycle arrives;
and the control unit is used for controlling the dispatching of the eMTC mode B user in the control period according to the determined result.
Preferably, the determining unit is configured to determine whether the eMTC mode B user can be scheduled in the control period, and the specific process includes:
Preferably, the low load condition is that the number of users in the cell is less than a preset low user number threshold and/or the resource block utilization rate of the cell is less than a preset low resource utilization threshold.
Preferably, the control unit is configured to allow the eMTC mode B user to be scheduled in the present control period if it is determined that the eMTC mode B user can be scheduled, and otherwise, not schedule the eMTC mode B user in the present control period.
A scheduling apparatus, comprising:
a memory; and a processor coupled to the memory, the processor configured to perform the method embodiments as described above based on instructions stored in the memory.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the above-mentioned method embodiments.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A scheduling control method, comprising:
when each preset control cycle arrives, the enhanced machine type communication (eMTC) cell determines whether the control cycle can schedule an eMTC mode B user or not according to the overload indication OI of the adjacent cell;
controlling the dispatching of the eMTC mode B user in the control period according to the determined result;
wherein, the determining whether the control period can schedule the eMTC mode B user according to the overload indication OI of the neighboring cell includes:
x1, judging whether a neighboring cell meets a first condition at present, wherein the first condition is that the grade of the overload indication exceeds a preset threshold; if yes, executing step x2, otherwise executing step x 6;
x2, the eMTC cell judges whether the resource block utilization rate of the eMTC mode B user of the cell is larger than a preset high resource utilization rate threshold, if so, the step x3 is executed, otherwise, the step x6 is executed;
x3, acquiring load information of each adjacent cell meeting the first condition, and judging whether the adjacent cell meets a preset low-load condition or not according to the load information;
x4, if at least one neighbor cell in the neighbor cells meeting the first condition meets the low load condition, executing a step x5, otherwise, executing a step x 6;
x5, judging that the control period can not schedule eMTC mode B users;
x6, it is determined that the control period can schedule eMTC mode B users.
2. The method of claim 1, wherein the low load condition is that a number of users in a cell is less than a preset low user number threshold and/or a resource block utilization rate of the cell is less than a preset low resource utilization threshold.
3. The method of claim 1, wherein the controlling scheduling of eMTC mode B users in the control period according to the determination comprises:
and if determining that the eMTC mode B user can be scheduled, allowing the eMTC mode B user to be scheduled in the control period, otherwise, not scheduling the eMTC mode B user in the control period.
4. A scheduling control device provided in a base station in which an enhanced machine communication (eMTC) cell is located, includes:
a determining unit, configured to determine whether the control period can schedule the eMTC mode B user according to the overload indication OI of the neighboring cell when each preset control period arrives, where the determining unit includes: x1, judging whether an adjacent area meets a first condition or not, wherein the first condition is that the grade of the overload indication exceeds a preset threshold; if yes, executing step x2, otherwise executing step x 6; x2, the eMTC cell judges whether the resource block utilization rate of the eMTC mode B user of the cell is larger than a preset high resource utilization rate threshold, if so, the step x3 is executed, otherwise, the step x6 is executed; x3, acquiring load information of each adjacent cell meeting the first condition, and judging whether the adjacent cell meets a preset low-load condition or not according to the load information; x4, if at least one neighbor cell in the neighbor cells meeting the first condition meets the low load condition, executing a step x5, otherwise, executing a step x 6; x5, judging that the control period can not schedule eMTC mode B users; x6, judging that the control period can schedule eMTC mode B users;
and the control unit is used for controlling the dispatching of the eMTC mode B user in the control period according to the determined result.
5. The apparatus of claim 4, wherein the low load condition is that a number of users of the cell is smaller than a preset low user number threshold and/or a resource block utilization of the cell is smaller than a preset low resource utilization threshold.
6. The apparatus of claim 4, wherein the control unit is configured to allow eMTC mode B users to be scheduled in the control period if it is determined that eMTC mode B users can be scheduled, and to not schedule eMTC mode B users in the control period otherwise.
7. A scheduling apparatus, comprising:
a memory; and a processor coupled to the memory, the processor configured to perform the method of any of claims 1-3 based on instructions stored in the memory.
8. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the method of any one of claims 1-3.
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