Resource scheduling apparatus, resource scheduling method, communication system, and storage medium

Abstract

The application provides a resource scheduling device, a resource scheduling method, a communication system and a storage medium. The resource scheduling device comprises: an interference judging unit, which judges whether the downlink channel of a first terminal under a first base station is interfered by the downlink channel of a second base station in a neighboring area according to the first CQI of the first terminal reported to the first base station for a first bandwidth and the second CQI of the first terminal reported to the first base station for a variable bandwidth allocated to the first terminal in a second bandwidth; and a mapping and scheduling unit, which maps out a first MCS according to the first CQI and a second MCS according to the second CQI when it is judged that there is interference, schedules the resources of the first bandwidth based on the first MCS and schedules the resources of the variable bandwidth based on the second MCS; and maps out an MCS according to the average of the first CQI and the second CQI or the smaller one of the first CQI and the second CQI when it is judged that there is no interference, and uniformly schedules the resources of the first bandwidth and the variable bandwidth based on the MCS.

Description

Technical Field

[0001] The present invention relates to resource scheduling in mobile communications, and in particular to a resource scheduling device, a resource scheduling method, a communication system and a storage medium. Background Art

[0002] DSS (Dynamic Spectrum Sharing) technology enables 4G / 5G dynamic spectrum sharing, meeting the data traffic needs of 4G / 5G users within limited spectrum resources. It utilizes instantaneous dynamic spectrum allocation to provide optimal performance for 4G and 5G devices.

[0003] As the existing 4G / 5G dynamic spectrum sharing technology, 40M bandwidth dynamic spectrum sharing technology is adopted. Figure 1 As shown in the figure, in the 40M bandwidth dynamic spectrum sharing, the upper 20M of the 40M is the NR (New Radio, New Air Interface) exclusive bandwidth part, and the lower 20M is the NR / LTE (Long Term Evolution, Long Term Evolution) shared bandwidth part. Alternatively, the configuration of the NR exclusive bandwidth part and the NR / LTE shared bandwidth part can also be the same Figure 1 The situation is the opposite, that is, the upper 20M of the 40M bandwidth can be the NR / LTE shared bandwidth part, and the lower 20M is the NR exclusive bandwidth part, which is omitted in the figure. When allocating bandwidth to the NR terminal, the NR terminal is allocated (20+x)M of the 40M bandwidth, of which 20M is the NR exclusive bandwidth part, and xM(0 <x≤20)带宽是NR / LTE共享带宽部分中的一部分带宽,是动态可变的。

[0004] Based on the existing 4G / 5G dynamic spectrum sharing technology, the existing resource scheduling method adopts a unified scheduling method, that is, scheduling resources according to a set of MCS (Modulation and Coding Scheme). As a specific scheduling method, for example, the NR terminal performs downlink channel quality measurement on the (20+x)M bandwidth allocated to itself, that is, CQI (Channel Quality Indication) measurement, and reports it to the DSS base station. The DSS base station maps the corresponding MCS based on the CQI, and schedules the (20+x)M bandwidth resources allocated to the NR terminal based on the MCS. Alternatively, the NR terminal evenly divides the (20+x)M bandwidth into multiple sub-bands, for example, 4 sub-bands, and measures the CQI for each of the 4 sub-bands, and reports the obtained 4 CQIs to the DSS base station. The DSS base station, for example, performs weighted addition or linear averaging on the 4 CQIs to obtain a CQI, maps the corresponding MCS based on the CQI, and performs resource scheduling based on the MCS. Summary of the Invention

[0005] Figure 2 This is a schematic diagram of the NR terminal being interfered with by the CRS of the neighboring LTE base station in the existing communication system. In the existing communication system, the way in which the DSS base station allocates bandwidth to the NR terminal and the LTE terminal is as follows: Figure 1 As shown in the figure, the bandwidth allocated by the neighboring LTE base station to the LTE terminal is Figure 1 Therefore, in the existing 4G / 5G dynamic spectrum sharing, in the NR / LTE shared bandwidth part, the downlink channel of the NR terminal under the DSS base station is interfered with by the CRS (Cell Reference Signal) from the LTE base station in the neighboring cell. In particular, when the NR terminal is located in a place far away from the DSS base station, the CRS from the nearby LTE base station will cause strong interference to the downlink channel of the NR terminal. In the NR / LTE shared bandwidth part, the downlink rate of the NR terminal drops sharply due to the CRS interference from the neighboring LTE base station, seriously affecting the NR performance and capacity in the DSS.

[0006] The above is a situation where the downlink channel of the NR terminal under the DSS base station is interfered with by the CRS from the neighboring LTE base station.

[0007] The inventors of the present invention have found that as long as there is an overlap between the bandwidth used for NR terminals and the bandwidth used for LTE terminals, the downlink channel of the NR terminal will be interfered with by the CRS from the neighboring LTE base station. Figure 2In the illustrated communication system, the DSS base station is replaced by an NR base station, and when the NR base station schedules resources of 40M bandwidth for an NR terminal, if the bandwidth allocated by a neighboring LTE base station for an LTE terminal partially overlaps with the 40M for the NR terminal, the downlink channel of the NR terminal under the NR base station will be interfered by the CRS from the neighboring LTE base station. However, based on the existing resource scheduling method, the NR base station can only uniformly schedule the NR terminal based on a set of MCS parameters, resulting in a sharp drop in the downlink rate of the NR terminal, and seriously affecting the performance, capacity and user experience of the NR.

[0008] Therefore, the purpose of the present application is to provide a resource scheduling device, a resource scheduling method, a communication system and a storage medium capable of improving the downlink rate of an NR terminal.

[0009] According to one aspect of the present application, a resource scheduling device is provided for a first base station to schedule resources of a predetermined bandwidth for a first terminal, the predetermined bandwidth including a first bandwidth and a second bandwidth, wherein the first bandwidth can be used only for the first terminal, and the second bandwidth can be used for the first terminal and a second terminal different from the first terminal, the resource scheduling device comprising:

[0010] an interference decision unit configured to determine whether the downlink channel of the first terminal under the first base station is interfered by the downlink channel of a neighboring second base station according to a first channel quality indicator (CQI) reported by the first terminal to the first base station for the first bandwidth and a second CQI reported by the first terminal to the first base station for a variable bandwidth in the second bandwidth allocated to the first terminal; and

[0011] a mapping and scheduling unit configured to map a first MCS according to the first CQI and a second MCS according to the second CQI, schedule resources of the first bandwidth based on the first MCS and schedule resources of the variable bandwidth based on the second MCS when the interference decision unit determines that the downlink channel of the first terminal under the first base station is interfered by the downlink channel of the neighboring second base station, and map an MCS according to an average of the first CQI and the second CQI or a smaller one of the first CQI and the second CQI, and uniformly schedule resources of the first bandwidth and the variable bandwidth based on the MCS when the interference decision unit determines that the downlink channel of the first terminal under the first base station is not interfered by the downlink channel of the neighboring second base station.

[0012] Preferably, the interference decision unit determines that the downlink channel of the first terminal under the first base station is interfered by the downlink channel of the neighboring second base station when the absolute value of the difference between the first CQI and the second CQI is greater than a predetermined threshold.

[0013] Preferably, the first base station is a new air interface base station, the first terminal is a new air interface terminal, the second base station is a long term evolution base station, the second terminal is a long term evolution terminal, the first bandwidth and the second bandwidth can be allocated to the first terminal by the first base station, and the second bandwidth can also be allocated to the second terminal by the second base station.

[0014] Preferably, the first base station is a dynamic spectrum sharing base station, the first terminal is a new air interface terminal, the second base station is a long term evolution base station, the second terminal is a long term evolution terminal, the first bandwidth can be allocated to the first terminal by the first base station, the second bandwidth can be dynamically allocated to the first terminal and the second terminal by the first base station, and the second bandwidth can also be allocated to the second terminal by the second base station.

[0015] Preferably, the interference from the downlink channel of the second base station in the neighboring cell is interference from the cell reference signal of the second base station in the neighboring cell.

[0016] Preferably, the second bandwidth is a continuous portion of the predetermined bandwidth, and the first bandwidth is a portion of the predetermined bandwidth excluding the second bandwidth.

[0017] Preferably, the predetermined bandwidth is 40M, the first bandwidth is 20M, the second bandwidth is 20M, and the variable bandwidth is xM, wherein 0 <x≤20。

[0018] According to another aspect of the present invention, a resource scheduling method is provided, in which a first base station schedules resources of a predetermined bandwidth for a first terminal, where the predetermined bandwidth includes a first bandwidth and a second bandwidth, wherein the first bandwidth can be used only for the first terminal, and the second bandwidth can be used for the first terminal and a second terminal different from the first terminal. The resource scheduling method includes:

[0019] determining, based on a first channel quality indicator (first CQI) for the first bandwidth and a second channel quality indicator (second CQI) for the variable bandwidth allocated to the first terminal in the second bandwidth reported by the first terminal to the first base station, whether a downlink channel of the first terminal under the first base station is interfered with by a downlink channel of a second base station in a neighboring cell;

[0020] When it is determined that the downlink channel of the first terminal under the first base station is interfered with by the downlink channel of the second base station in the neighboring cell, a first MCS is mapped according to the first CQI, a second MCS is mapped according to the second CQI, resources of the first bandwidth are scheduled based on the first MCS, and resources of the variable bandwidth are scheduled based on the second MCS;

[0021] When it is determined that the downlink channel of the first terminal under the first base station is not interfered with by the downlink channel of the second base station in the neighboring area, the MCS is mapped according to the average value of the first CQI and the second CQI or the CQI of the smaller one of the first CQI and the second CQI, and the resources of the first bandwidth and the variable bandwidth are uniformly scheduled based on the MCS.

[0022] Preferably, when the absolute value of the difference between the first CQI and the second CQI is greater than a predetermined threshold, it is determined that the downlink channel of the first terminal under the first base station is interfered with by the downlink channel of a second base station in a neighboring cell.

[0023] Preferably, when the physical resource block of the first terminal occupies a portion of the second bandwidth in addition to the first bandwidth, it is determined based on the first CQI and the second CQI whether the downlink channel of the first terminal under the first base station is interfered with by the downlink channel of the second base station in the neighboring area.

[0024] When the occupation of the physical resource block of the first terminal does not exceed the first bandwidth, an MCS is mapped according to the first CQI, and resources of the first bandwidth are uniformly scheduled based on the MCS.

[0025] According to another aspect of the present invention, a communication system is provided, comprising a first terminal and a first base station, wherein the first base station comprises the resource scheduling device according to claim 1, wherein:

[0026] The first terminal reports, to the first base station, a first CQI measured for the first bandwidth and a second CQI measured for the variable bandwidth allocated to the first terminal in the second bandwidth,

[0027] The resource scheduling device receives a first CQI and a second CQI reported by the first terminal to the first base station.

[0028] According to another aspect of the present invention, a storage medium is provided, which stores a program, and when the program is executed by a processor, the method described in the above resource scheduling method is implemented.

[0029] The adaptive scheduler of the present invention determines whether the downlink channel of the NR terminal is interfered with by the downlink channel of the neighboring LTE base station based on CQI1 and CQI2, specifically determines whether it is interfered with by the CRS from the neighboring LTE base station. When it is determined that the downlink channel of the NR terminal is interfered with by the downlink channel of the neighboring LTE base station, the adaptive scheduler performs segmented scheduling of resources of the NR exclusive bandwidth part and the NR / LTE overlapping bandwidth part. When the interference judgment unit determines that the downlink channel of the NR terminal is not interfered with by the downlink channel of the neighboring LTE base station, the adaptive scheduler performs unified scheduling of resources of the NR exclusive bandwidth part and the NR / LTE overlapping bandwidth part. According to the adaptive scheduler of the present invention, it is possible to reduce the impact of the CRS from the neighboring LTE base station on the downlink channel scheduling of the NR terminal, improve the downlink rate of the NR terminal, improve the NR user experience, improve the performance and capacity of the DSS / NR base station, improve the utilization rate of DSS / NR resources, reduce the operation and maintenance and optimization costs of DSS / NR, and facilitate the implementation and promotion of the DSS / NR technical solution.

[0030] The adaptive scheduling method of the present invention effectively solves the problem of a sharp drop in the downlink rate of 40M NR terminals in the 40M bandwidth DSS (NR40M / LTE20M) or 40MNR technical solutions. It is highly targeted at the current implementation and construction of 40M DSS / NR networks. It greatly improves the reliability and completeness of the 40M DSS / NR technical solution, shortens the network construction cycle, and reduces network construction and operation and maintenance costs. Since there are few changes to existing DSS / NR base stations, the implementation complexity is low, making it easy to implement the system and promote the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the existing 4G / 5G dynamic spectrum sharing.

[0032] Figure 2 This is a schematic diagram of an NR terminal being interfered with by the CRS of a neighboring LTE base station in an existing communication system.

[0033] Figure 3 It is a structural diagram of an adaptive scheduler according to an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of adaptive scheduling performed by an adaptive scheduler according to an embodiment of the present invention.

[0035] Figure 5 This is the workflow in the DSS base station system according to the embodiment of the present invention.

[0036] Figure 6 A diagram showing an exemplary configuration of a computing device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] The inventors of the present invention have found that, for example, Figure 2 In the existing communication system shown, when the downlink rate of the NR terminal in the NR / LTE shared bandwidth part drops sharply, it is found through testing that the CQI (represented by CQI2) of the NR / LTE shared bandwidth part is significantly lower than the CQI (represented by CQI1) in the NR exclusive bandwidth part. For example, CQI1 is 12 and CQI2 drops to less than 6.

[0039] In the existing unified resource scheduling method, since the NR terminal reports a CQI measured for the entire bandwidth of (20+x)M, the CQI cannot correctly reflect the channel quality, resulting in inaccurate mapped MSC, followed by deterioration of BLER (block error rat, block error rate), and MCS reduction, which causes the NR terminal downlink rate to drop sharply. In the case where the NR terminal reports multiple CQIs measured for multiple subbands of the (20+x)M bandwidth, since the variable bandwidth xM bandwidth is not fixed and can be changed instantaneously, the weighted or linearly averaged CQI is also inaccurate, resulting in inaccurate mapped MSC, followed by deterioration of BLER, and MCS reduction, which causes the NR terminal downlink rate to drop sharply.

[0040] The xM bandwidth allocated to NR terminals in the NR / LTE shared bandwidth is interfered with by the CRS from the neighboring LTE base station, resulting in inaccurate full-band CQI or sub-band CQI, whether calculated individually or after weighted or linear averaging. The mapping of CQI to MCS also makes the MCS inaccurate. The DSS or NR base station can only uniformly schedule NR terminals based on a set of MCS parameters, causing a sharp drop in the downlink rate of NR terminals, seriously affecting the performance, capacity and user experience of NR in the DSS.

[0041] In an embodiment of the present invention, a resource scheduling apparatus and resource scheduling method are provided for a first base station to schedule resources of a predetermined bandwidth for an NR terminal. The predetermined bandwidth includes a first bandwidth and a second bandwidth, wherein the first bandwidth can be used only for NR terminals, and the second bandwidth can be used overlappingly for NR terminals and LTE terminals.

[0042] In the embodiments of the present invention, for example, the scheduled bandwidth is 40 Mbps, the first bandwidth is the upper 20 Mbps of the scheduled bandwidth, and the second bandwidth is the lower 20 Mbps of the scheduled bandwidth. However, in the embodiments of the present invention, the distribution of the first and second bandwidths is not limited to this. As other distributions of the first and second bandwidths, for example, when the scheduled bandwidth is 40 Mbps, the first bandwidth may be the lower 20 Mbps of the scheduled bandwidth, and the second bandwidth may be the upper 20 Mbps of the scheduled bandwidth. Alternatively, the second bandwidth may be the middle 20 Mbps of the scheduled bandwidth, and the first bandwidth may be the portion of the scheduled bandwidth excluding the second bandwidth. Furthermore, the distribution of the first and second bandwidths does not necessarily have to be the same. For example, when the scheduled bandwidth is 40 Mbps, the first bandwidth may be 25 Mbps and the second bandwidth may be 15 Mbps, or the first bandwidth may be 30 Mbps and the second bandwidth may be 10 Mbps. Furthermore, the scheduled bandwidth is not limited to 40 Mbps and may be greater than or less than 40 Mbps. In the embodiment of the present invention, the second bandwidth is a continuous portion of the predetermined bandwidth (the second bandwidth is less than or equal to 20M). In this case, the first bandwidth is the portion of the predetermined bandwidth excluding the second bandwidth.

[0043] In the embodiments of the present invention, the first base station may be a DSS base station or a NR base station. The DSS base station described in the embodiments of the present invention is a 4G / 5G hybrid base station that is created by implementing a software upgrade on an existing 4G LTE base station or a newly created NR base station is a 5G base station newly created for 5G.

[0044] When the first base station is a DSS base station, the first bandwidth is the NR-exclusive bandwidth allocated by the DSS base station only to NR terminals. The second bandwidth is the NR / LTE shared bandwidth dynamically allocated by the DSS base station to NR terminals and LTE terminals. Furthermore, the second bandwidth is also the bandwidth allocated to LTE terminals by neighboring LTE base stations. In other words, the second bandwidth is the bandwidth used for both NR and LTE terminals in an overlapping manner.

[0045] In addition, when the first base station is an NR base station, the predetermined bandwidth, i.e., the first bandwidth and the second bandwidth, are both bandwidths allocated by the NR base station to the NR terminal. Moreover, the second bandwidth can also be bandwidth allocated by a neighboring LTE base station to the LTE terminal. In other words, the second bandwidth is a bandwidth that is used for both NR terminals and LTE terminals in an overlapping manner.

[0046] As described above, the first bandwidth is used only for NR terminals. In this embodiment of the present invention, the first bandwidth is referred to as the NR-exclusive bandwidth portion. Furthermore, the second bandwidth is used for both NR terminals and LTE terminals. In this embodiment of the present invention, the second bandwidth is referred to as the NR / LTE overlap bandwidth portion. Furthermore, the portion of the second bandwidth allocated to NR terminals is referred to as the variable bandwidth, which is greater than zero and less than or equal to the second bandwidth.

[0047] In an embodiment of the present invention, adaptive scheduling is performed based on the interference of the CRS from the neighboring LTE base station in the variable bandwidth portion allocated to the NR terminal in the NR / LTE overlapping bandwidth portion, and unified scheduling and segmented scheduling are dynamically switched, thereby reducing the impact of the CRS from the neighboring LTE base station on the downlink channel of the NR terminal and improving the downlink rate of the NR terminal. That is, the resource scheduling device of the embodiment of the present invention is an adaptive scheduler. When the downlink channel of the NR terminal is interfered with by the CRS from the neighboring LTE base station, the adaptive scheduler of the embodiment of the present invention performs segmented scheduling on the resources of the NR exclusive bandwidth portion and the NR / LTE overlapping bandwidth portion. When the downlink channel of the NR terminal is not interfered with by the CRS from the neighboring LTE base station, the adaptive scheduler of the embodiment of the present invention performs unified scheduling on the resources of the NR exclusive bandwidth portion and the NR / LTE overlapping bandwidth portion.

[0048] The adaptive scheduler of an embodiment of the present invention can be set in a DSS base station or an NR base station to perform resource scheduling for the NR terminal.

[0049] like Figure 3 As shown, the adaptive scheduler according to the embodiment of the present invention includes a CRS interference determination unit 301 , a CQI and MCS mapping unit 302 and a scheduling unit 303 .

[0050] The CRS interference decision unit 301 determines whether the downlink channel of the NR terminal is interfered with by the CRS from the neighboring LTE base station based on CQI1 and CQI2. Among them, CQI1 is the CQI reported by the NR terminal measured for the NR exclusive bandwidth part, and CQI2 is the CQI reported by the NR terminal measured for the variable bandwidth part allocated to itself in the NR / LTE overlapping bandwidth part. Among them, the variable bandwidth is the bandwidth instantaneously occupied by the NR terminal, and the variable bandwidth is greater than zero and less than or equal to the NR / LTE overlapping bandwidth.

[0051] As a method for determining whether interference is occurring, for example, determining whether the absolute value of the difference between CQI1 and CQI2 is greater than a predetermined threshold value can be used to determine whether interference is occurring from the CRS of a neighboring LTE base station. Specifically, when the absolute value of the difference between CQI1 and CQI2 is greater than the predetermined threshold value, it is determined that interference is occurring from the CRS of a neighboring LTE base station. When the absolute value of the difference between CQI1 and CQI2 is less than or equal to the predetermined threshold value, it is determined that no interference is occurring from the CRS of a neighboring LTE base station. Here, the predetermined threshold value can be preset.

[0052] When the CRS interference judgment unit 301 determines that the downlink channel of the NR terminal is interfered with by the CRS from the neighboring LTE base station, the adaptive scheduler performs segmented scheduling of the resources of the NR exclusive bandwidth part and the variable bandwidth part, that is, the CQI and MCS mapping unit 302 maps MCS1 based on CQI1 and maps MCS2 based on CQI2, and the scheduling unit 303 schedules the resources of the NR exclusive bandwidth part based on MCS1, and schedules the variable bandwidth resources in the NR / LTE overlapping bandwidth part based on MCS2.

[0053] When the CRS interference judgment unit 301 determines that the downlink channel of the NR terminal is not interfered with by the CRS from the neighboring LTE base station, the adaptive scheduler uniformly schedules the resources of the NR exclusive bandwidth part and the variable bandwidth part, that is, the CQI and MCS mapping unit 302 maps the corresponding MCS according to the smaller CQI of CQI1 and CQI2, or the CQI and MCS mapping unit 302 maps the corresponding MCS according to the average CQI of CQI1 and CQI2, and the scheduling unit 303 uniformly schedules the resources of the NR exclusive bandwidth part and the variable bandwidth part based on the MCS.

[0054] In the embodiments of the present invention, resources can be scheduled on a single carrier during segmented scheduling and unified scheduling. Downlink resource scheduling in the embodiments of the present invention refers to downlink PRB (physical resource block) allocation and MCS selection for NR terminals.

[0055] In the embodiment of the present invention, when CQI1 and CQI2 are the same, it can be regarded that the downlink channel of the NR terminal is interfered with by the CRS from the neighboring LTE base station to zero. At this time, the corresponding MCS is mapped based on CQI1 or CQI2, and unified scheduling is performed based on the MCS.

[0056] When CQI1 is different from CQI2, and the absolute value of the difference between CQI1 and CQI2 is less than a predetermined threshold, it can also be regarded that the downlink channel of the NR terminal is not interfered with by the CRS from the neighboring LTE base station. This situation is actually a situation where the interference is small, or the interference can be ignored. In this case, the corresponding MCS is mapped according to the CQI of the smaller one of CQI1 and CQI2 or the average CQI of CQI1 and CQI2, and unified scheduling can be performed according to the MCS. In this case, while simplifying the complexity of adaptive scheduling, it can reduce the impact of the CRS from the neighboring LTE base station on the downlink channel of the NR terminal and improve the downlink rate of the NR terminal.

[0057] Figure 4 A schematic diagram showing scheduling by an adaptive scheduler according to an embodiment of the present invention is shown. Figure 4In the example, an example is given in which the scheduled bandwidth is 40M, the first bandwidth, i.e., the NR exclusive bandwidth, is the upper half of the 20M in the scheduled bandwidth, and the second bandwidth, i.e., the NR / LTE overlapping bandwidth, is the lower half of the 20M in the scheduled bandwidth.

[0058] When the NR terminal is near the first base station, the downlink channel of the NR terminal under the first base station is not easily interfered with by the CRS from the neighboring LTE base station. However, when the NR terminal is in a place medium or far away from the first base station, the downlink channel of the NR terminal under the first base station is easily interfered with by the CRS from the neighboring LTE base station.

[0059] Since the first bandwidth part, i.e., the NR exclusive bandwidth part, is a bandwidth used only for NR terminals, in the NR exclusive bandwidth part, the downlink resources from the first base station to the NR terminal will not be interfered with by the CRS from the neighboring LTE base station. Figure 4 Indicated by the horizontal line part.

[0060] In contrast, since the second bandwidth portion, i.e., the NR / LTE overlapping bandwidth portion, is the overlapping portion for NR terminals and LTE terminals, in the NR / LTE overlapping bandwidth portion, the downlink channel resources of the NR terminal under the first base station are easily interfered with by the CRS from the neighboring LTE base station. Figure 4 In the NR / LTE overlapping bandwidth part, the horizontal and diagonal parts are the variable bandwidth xM(0 <x≤20),该可变带宽xM是NR终端瞬时占用的带宽。其中,NR / LTE重叠带宽部分中的横线部分表示第一基站下NR终端的下行信道未受到来自邻区LTE基站的CRS的干扰,或者受到的干扰小,可忽略,NR / LTE重叠带宽部分中的斜线部分表示第一基站下NR终端的下行信道受到来自邻区LTE基站的CRS的干扰,或者受到的干扰严重。另外,当所述第一基站是DSS基站的情况下,NR / LTE重叠带宽部分中的灰色部分是由DSS基站动态地分配给LTE终端的带宽,当所述第一基站是NR基站的情况下,NR / LTE重叠带宽部分中的灰色部分是NR基站瞬时未调度给NR终端的带宽,即NR终端瞬时未占满的带宽。

[0061] The following shows the results of resource scheduling performed by the adaptive scheduler based on the embodiment of the present invention. Figure 4As shown, it is assumed that in time slots T01, T02, T06, T07, T10, and T11, in the variable bandwidth xM part of the NR / LTE overlapping bandwidth part, the downlink channel of the NR terminal under the first base station is not interfered with by the CRS from the neighboring LTE base station, and in time slots T03, T04, T05, T08, and T09, in the variable bandwidth xM part of the NR / LTE overlapping bandwidth part, the downlink channel of the NR terminal under the first base station is interfered with by the CRS from the neighboring LTE base station. In this case, based on the result of adaptive scheduling performed by the adaptive scheduler according to the embodiment of the present invention, in time slots T01, T02, T06, T07, T10, and T11, the (20+x)M bandwidth is uniformly scheduled, and in time slots T03, T04, T05, T08, and T09, the 20M bandwidth and the xM bandwidth are segmented.

[0062] As described above, in the embodiment of the present invention, unified scheduling and segmented scheduling are switched according to the interference of the downlink channel of the NR terminal by the CRS of the neighboring LTE base station, thereby reducing the impact of the CRS interference from the neighboring LTE base station on the scheduling of the downlink channel of the NR terminal, improving the downlink rate of the NR terminal, improving the NR user experience, improving the performance and capacity of the DSS base station and the NR base station, improving the DSS resource utilization, reducing the DSS operation and maintenance and optimization costs, and facilitating the implementation and promotion of the DSS technical solution.

[0063] Figure 5 This is the workflow in the DSS base station system according to the embodiment of the present invention, specifically illustrating a method for performing resource scheduling in the DSS base station.

[0064] In step 501, the DSS base station is powered on and initialized.

[0065] In step 502, the DSS base station determines whether the switch of the adaptive scheduler of the embodiment of the present invention is turned on. If the switch of the adaptive scheduler is turned off (step 502: no), the process proceeds to step S503; if the switch of the adaptive scheduler is turned on (step 502: yes), the process proceeds to step S504.

[0066] In step 503, the DSS base station executes the existing unified scheduling process, that is, it schedules the resources of the NR terminal in a unified manner according to the existing unified scheduling method. The description of the existing unified scheduling method is omitted here.

[0067] In step 504, the DSS base station determines whether the NR terminal's physical resource block occupancy exceeds the NR exclusive bandwidth portion (20M). That is, it determines whether the NR terminal's physical resource block occupies a portion of the NR / LTE overlapping bandwidth (variable bandwidth xM) in addition to the NR exclusive bandwidth portion (20M). If it is determined that the NR terminal's physical resource block occupancy does not exceed the NR exclusive bandwidth portion (step 504: No), the process proceeds to step 505. If it is determined that the NR terminal's physical resource block occupancy exceeds the NR exclusive bandwidth portion (step 504: Yes), the process proceeds to step 506.

[0068] In step 505, the adaptive scheduler uniformly schedules the resources of the NR terminal. Here, since the physical resource block occupied by the NR terminal does not exceed the NR exclusive bandwidth portion, the adaptive scheduler can map the corresponding MCS based on the CQI measured for the NR exclusive bandwidth portion reported by the NR terminal and uniformly schedule the resources of the NR exclusive bandwidth portion based on the MCS.

[0069] In step 506, the adaptive scheduler obtains CQI1 and CQI2 respectively, where CQI1 is the CQI reported by the NR terminal measured for the NR exclusive bandwidth part (20M), and CQI2 is the CQI reported by the NR terminal measured for the variable bandwidth (xM) of the NR / LTE overlapping bandwidth part.

[0070] In step 507, the adaptive scheduler determines whether the downlink channel of the NR terminal is interfered with by the CRS from the neighboring LTE base station based on CQI1 and CQI2.

[0071] As a method for determining whether interference is present, when there is a large step change between CQI1 and CQI2, it is considered that there is interference from the neighboring LTE CRS. For example, the absolute value of the difference between CQI1 and CQI2 is determined to be greater than a predetermined threshold to determine whether there is interference from the CRS of the neighboring LTE base station. Specifically, when |CQI1-CQI2|>Threshold_CRS, it is determined that there is interference from the CRS of the neighboring LTE base station; otherwise, it is determined that there is no interference from the CRS of the neighboring LTE base station. Among them, Threshold_CRS is a judgment threshold and can be preset.

[0072] When it is determined in step 507 that the downlink channel of the NR terminal is interfered with by the CRS from the neighboring LTE base station, step 508 is executed.

[0073] At step 508, the adaptive scheduler performs segmented scheduling on the resources of the NR exclusive bandwidth part (20M) and the variable bandwidth (xM) of the NR / LTE overlapping bandwidth part. Specifically, at step 5081, MCS1 and MCS2 are mapped according to CQI1 and CQI2 respectively, at step 5082, the resources of the NR exclusive bandwidth part (20M) are scheduled based on MCS1, and the resources of the variable bandwidth (xM) of the NR / LTE overlapping bandwidth part are scheduled based on MCS2.

[0074] When it is determined at step 507 that the downlink channel of the NR terminal is not interfered by the CRS from the neighboring LTE base station, step 509 is performed.

[0075] At step 509, the adaptive scheduler performs unified scheduling on the resources of the NR exclusive bandwidth part (20M) and the variable bandwidth (xM) of the NR / LTE overlapping bandwidth part. Specifically, at step 5091, the corresponding MCS is mapped according to the smaller one of CQI1 and CQI2, for example, when CQI2 < CQI1, the corresponding MCS is mapped according to CQI2. Alternatively, at step 5091, the corresponding MCS can also be mapped according to the average CQI of CQI1 and CQI2. Then, at step 5092, the resources of the NR exclusive bandwidth part (20M) and the variable bandwidth (xM) of the NR / LTE overlapping bandwidth part, i.e., the (20+x)M resources, are unified scheduled based on the MCS mapped at step 5091.

[0076] The above embodiment of the present application takes the bandwidth allocation mode in which the NR exclusive bandwidth part is 20M and the NR / LTE overlapping bandwidth part is 20M as an example for description, but the working process of the DSS base station system of the above embodiment of the present application can also be applied to different bandwidth allocation modes, which will not be described in detail herein.

[0077] In addition, the working process of the DSS base station system of the above embodiment of the present application can also be applied to the 5G base station, i.e., the NR base station system, which will not be described in detail herein.

[0078] The working process of the DSS / NR base station system according to the embodiment of the present application has strong pertinence for the implementation and construction of the current 40M DSS / NR network, greatly improves the reliability and completeness of the 40M DSS / NR technical solution, shortens the network construction period, and reduces the network construction and operation and maintenance costs. Since there are few changes to the existing DSS / NR base station, the implementation complexity is low, and the system implementation and solution promotion are easy.

[0079] In the embodiment of the present invention, the case where the downlink channel of the NR terminal is interfered with by the CRS from the neighboring LTE base station is taken as an example for explanation. However, the adaptive scheduler of the embodiment of the present invention can be applied in the case where the downlink channel of the NR terminal is interfered with by any signal from the downlink channel of the neighboring LTE base station.

[0080] Therefore, in the adaptive scheduler of the embodiment of the present invention, the CRS interference determination unit 301 can be replaced by an interference determination unit, which can determine whether the downlink channel of the NR terminal is interfered with by the downlink channel of the neighboring LTE base station based on CQI1 and CQI2. When the interference determination unit determines that the downlink channel of the NR terminal is interfered with by the downlink channel of the neighboring LTE base station, the adaptive scheduler performs segmented scheduling of the resources of the NR exclusive bandwidth part and the NR / LTE overlapping bandwidth part. When the interference determination unit determines that the downlink channel of the NR terminal is not interfered with by the downlink channel of the neighboring LTE base station, the adaptive scheduler performs unified scheduling of the resources of the NR exclusive bandwidth part and the NR / LTE overlapping bandwidth part.

[0081] The resource scheduling method of the embodiment of the present invention can be implemented by the adaptive scheduler of the embodiment of the present invention, and the adaptive scheduler can be implemented by Figure 6 The computing device 600 shown implements.

[0082] Computing device 600 is an example of a hardware device to which the resource scheduling method according to an embodiment of the present invention can be applied. Computing device 600 can be any machine configured to perform processing and / or computing. Computing device 600 can be, but is not limited to, a workstation, a server, a desktop computer, a laptop computer, a tablet computer, a personal data assistant (PDA), a smartphone, an in-vehicle computer, or a combination thereof.

[0083] like Figure 6As shown, the computing device 600 may include one or more components that can be connected or communicated with the bus 602 via one or more interfaces. The bus 602 may include, but is not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MCA) bus, an Enhanced ISA (EISA) bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus. The computing device 600 may include, for example, one or more processors 604, one or more input devices 606, and one or more output devices 608. The one or more processors 604 may be any type of processor and may include, but is not limited to, one or more general-purpose processors or special-purpose processors (such as a dedicated processing chip). The processor 604 may, for example, execute Figure 5 Steps 506-509 in are configured to implement Figure 3 The functions of the various units of the adaptive scheduler in the embodiment of the present invention are as follows. Input device 606 can be any type of input device capable of inputting information to the computing device, and can include but is not limited to a mouse, keyboard, touch screen, microphone, and / or remote control. Output device 608 can be any type of device capable of presenting information, and can include but is not limited to a display, speaker, video / audio output terminal, vibrator, and / or printer.

[0084] The computing device 600 may also include or be connected to a non-transitory storage device 614, which may be any non-transitory storage device that can implement data storage and may include, but is not limited to, a disk drive, an optical storage device, a solid-state memory, a floppy disk, a flexible disk, a hard disk, a magnetic tape or any other magnetic medium, a compact disk or any other optical medium, a cache memory and / or any other storage chip or module, and / or any other medium from which a computer can read data, instructions and / or code. The computing device 600 may also include a random access memory (RAM) 610 and a read-only memory (ROM) 612. The ROM 612 may store programs, utilities or processes to be executed in a non-volatile manner. The RAM 610 may provide volatile data storage and store instructions related to the operation of the computing device 600. The computing device 600 may also include a network / bus interface 616 coupled to a data link 618. The network / bus interface 616 can be any type of device or system capable of enabling communication with external devices and / or networks, and can include but is not limited to a modem, a network card, an infrared communication device, a wireless communication device and / or a chipset (such as a Bluetooth™ device, an 802.11 device, a WiFi device, a WiMax device, a cellular communication facility, etc.).

[0085] The present application can be implemented as any combination of an apparatus, a system, an integrated circuit, and a computer program on a non-transitory computer readable medium. One or more processors can be implemented as an integrated circuit (IC), an application specific integrated circuit (ASIC), or a large scale integrated circuit (LSI), a system LSI, a super LSI, or a ultra LSI component that performs part or all of the functions described in the present disclosure.

[0086] The present application includes the use of software, applications, computer programs, or algorithms. The software, applications, computer programs, or algorithms can be stored on a non-transitory computer readable medium to cause a computer, such as one or more processors, to perform the steps described above and in the accompanying drawings. For example, one or more memories store software or algorithms in executable instructions, and one or more processors can execute a set of instructions associated with the software or algorithms to provide various functionality in accordance with embodiments described in the present application.

[0087] Software and computer programs (which can also be referred to as programs, software applications, applications, components, or code) include machine instructions for a programmable processor and can be implemented in a high-level procedural, object-oriented programming, functional, logical, or assembly language or machine language. The term "computer readable medium" refers to any computer program product, apparatus, or device, such as a magnetic disk, optical disk, solid state storage device, memory, and programmable logic device (PLD), used to provide machine instructions or data to a programmable data processing apparatus, including a computer readable medium that receives machine instructions as a computer readable signal.

[0088] By way of example, computer readable media can include dynamic random access memory (DRAM), read only memory (ROM), erasable programmable read only memory (EPROM), compact disk read only memory (CD-ROM) or other optical disk storage, magnetic disk storage, or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired computer readable program code in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer, or a general purpose or special purpose processor. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray® disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer readable media.

[0089] The subject matter of the present invention is provided as an example of an apparatus, system, method, and program for performing the features described in this disclosure. However, in addition to the features described above, other features or variations are also contemplated. It is contemplated that any emerging technology may be used to implement the components and functionality of the present invention, which may replace any of the above-described implementation technologies.

[0090] While various embodiments of the present invention have been described above, the above descriptions are intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or technical improvements to marketed technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A resource scheduling device, configured for a first base station to schedule resources of a predetermined bandwidth to a first terminal, wherein the predetermined bandwidth includes a first bandwidth and a second bandwidth, wherein: The first bandwidth can be used only for the first terminal, the second bandwidth can be used for the first terminal and a second terminal different from the first terminal, and the resource scheduling device includes: an interference determination unit, configured to determine, based on a first channel quality indicator (i.e., a first CQI) for the first bandwidth and a second channel quality indicator (i.e., a second CQI) for the variable bandwidth allocated to the first terminal in the second bandwidth reported by the first terminal to the first base station, whether a downlink channel of the first terminal under the first base station is interfered with by a downlink channel of a second base station in a neighboring cell; and A mapping and scheduling unit, when the interference judgment unit determines that the downlink channel of the first terminal under the first base station is interfered with by the downlink channel of the second base station in the neighboring area, maps a first MCS according to the first CQI, maps a second MCS according to the second CQI, schedules the resources of the first bandwidth based on the first MCS, and schedules the resources of the variable bandwidth based on the second MCS; when the interference judgment unit determines that the downlink channel of the first terminal under the first base station is not interfered with by the downlink channel of the second base station in the neighboring area, maps an MCS according to the average value of the first CQI and the second CQI or the CQI of the smaller one of the first CQI and the second CQI, and uniformly schedules the resources of the first bandwidth and the variable bandwidth based on the MCS.

2. The resource scheduling device according to claim 1, wherein: The interference determination unit determines that the downlink channel of the first terminal under the first base station is interfered with by the downlink channel of a second base station in a neighboring cell when the absolute value of the difference between the first CQI and the second CQI is greater than a predetermined threshold.

3. The resource scheduling device according to claim 1, wherein: The first base station is a new air interface base station, and the first terminal is a new air interface terminal. The second base station is a long term evolution base station, and the second terminal is a long term evolution terminal. The first bandwidth and the second bandwidth can be allocated to the first terminal by the first base station, and the second bandwidth can also be allocated to the second terminal by the second base station.

4. The resource scheduling device according to claim 1, wherein: The first base station is a dynamic spectrum sharing base station, and the first terminal is a new air interface terminal. The second base station is a long term evolution base station, and the second terminal is a long term evolution terminal. The first bandwidth can be allocated to the first terminal by the first base station, the second bandwidth can be dynamically allocated to the first terminal and the second terminal by the first base station, and the second bandwidth can also be allocated to the second terminal by the second base station.

5. The resource scheduling device according to claim 1, wherein: The interference of the downlink channel from the second base station in the neighboring cell is the interference of the cell reference signal from the second base station in the neighboring cell. The resource scheduling device according to claim 1 , wherein: The second bandwidth is a continuous portion of the predetermined bandwidth, and the first bandwidth is a portion of the predetermined bandwidth excluding the second bandwidth.

7. A resource scheduling method, wherein a first base station schedules resources of a predetermined bandwidth to a first terminal, wherein the predetermined bandwidth includes a first bandwidth and a second bandwidth, wherein: The first bandwidth is usable only for the first terminal, the second bandwidth is usable for the first terminal and a second terminal different from the first terminal, and the resource scheduling method includes: determining, based on a first channel quality indicator (first CQI) for the first bandwidth and a second channel quality indicator (second CQI) for the variable bandwidth allocated to the first terminal in the second bandwidth reported by the first terminal to the first base station, whether a downlink channel of the first terminal under the first base station is interfered with by a downlink channel of a second base station in a neighboring cell; When it is determined that the downlink channel of the first terminal under the first base station is interfered with by the downlink channel of the second base station in the neighboring cell, a first MCS is mapped according to the first CQI, a second MCS is mapped according to the second CQI, resources of the first bandwidth are scheduled based on the first MCS, and resources of the variable bandwidth are scheduled based on the second MCS; When it is determined that the downlink channel of the first terminal under the first base station is not interfered with by the downlink channel of the second base station in the neighboring area, the MCS is mapped according to the average value of the first CQI and the second CQI or the CQI of the smaller one of the first CQI and the second CQI, and the resources of the first bandwidth and the variable bandwidth are uniformly scheduled based on the MCS.

8. The resource scheduling method according to claim 7, wherein: When the absolute value of the difference between the first CQI and the second CQI is greater than a predetermined threshold, it is determined that the downlink channel of the first terminal under the first base station is interfered with by the downlink channel of a second base station in a neighboring cell.

9. The resource scheduling method according to claim 7, wherein: When the physical resource block of the first terminal occupies a portion of the second bandwidth in addition to the first bandwidth, determining, based on the first CQI and the second CQI, whether a downlink channel of the first terminal under the first base station is interfered with by a downlink channel of a second base station in a neighboring cell, When the occupation of the physical resource block of the first terminal does not exceed the first bandwidth, an MCS is mapped according to the first CQI, and resources of the first bandwidth are uniformly scheduled based on the MCS.

10. A communication system comprising a first terminal and a first base station, wherein the first base station comprises the resource scheduling device according to claim 1, wherein: The first terminal reports, to the first base station, a first CQI measured for the first bandwidth and a second CQI measured for the variable bandwidth allocated to the first terminal in the second bandwidth, The resource scheduling device receives a first CQI and a second CQI reported by the first terminal to the first base station.

11. A storage medium storing a program, wherein when the program is executed by a processor, the method according to any one of claims 7 to 9 is implemented.

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