WO2018068220A1

WO2018068220A1 - Terminal scheduling method and base station

Info

Publication number: WO2018068220A1
Application number: PCT/CN2016/101858
Authority: WO
Inventors: 杨召青
Original assignee: 华为技术有限公司
Priority date: 2016-10-12
Filing date: 2016-10-12
Publication date: 2018-04-19
Also published as: CN109804696A

Abstract

Disclosed are a terminal scheduling method and a base station. The method comprises: when a first cell has an edge terminal to be scheduled, a base station of the first cell determining a scheduling resource of the edge terminal, wherein the scheduling resource of the edge terminal is staggered from a scheduling resource of an edge terminal of a second cell in a time domain, and the first cell is adjacent to the second cell; and the base station scheduling the edge terminal on the scheduling resource. In the technical solution of the present invention, scheduling resources of edge terminals of a first cell and a second cell are staggered in a time domain, thereby effectively reducing inter-cell interference.

Description

Method for scheduling terminal and base station

Technical field

The present invention relates to the field of communications, and in particular, to a method for scheduling a terminal and a base station.

Background technique

At present, the Orthogonal Frequency Division Multiplexing (OFDM) technology is adopted in the Long Term Evolution (LTE) system of the universal mobile communication technology, and the frequency reuse factor of the LTE system is 1, that is, all cells simultaneously The entire system frequency band is used, so that inter-cell interference becomes negligible, especially the cell edge user (CEU) at the cell edge, which is more seriously interfered by neighboring cells.

In the prior art, the LTE system adopts Inter Cell Interference Coordination (ICIC) technology to divide the system bandwidth into three frequency bands, so that adjacent cells use different edge bands to carry CEU, and try to schedule CEU in the edge band. So as to reduce interference between adjacent cells.

For narrowband LTE systems such as LTE 1.4M and LTE 3M, the bandwidth is small and the number of resource blocks (RBs) is small. It is impossible to effectively divide the bandwidth into three frequency bands. If the bandwidth is forcibly divided into three frequency bands, It will affect the single-user throughput rate in LTE systems, and network interference has no optimization effect.

Summary of the invention

The embodiment of the invention provides a method for scheduling a terminal and a base station, which can enable the base station to shift the scheduling resources of the edge terminals of the first cell and the second cell in the time domain, thereby effectively reducing inter-cell interference.

In view of this, the first aspect of the present invention provides a method for scheduling a terminal, including:

When there is an edge terminal to be scheduled in the first cell, the base station of the first cell determines the scheduling resource of the edge terminal, and the scheduling resource of the edge terminal is staggered in the time domain with the scheduling resource of the edge terminal of the second cell, where The first cell is adjacent to the second cell;

The base station schedules the edge terminal on the scheduling resource.

In the embodiment of the present invention, when there is an edge terminal to be scheduled in the first cell, the base station of the first cell determines the scheduling resource of the edge terminal, and the scheduling resource of the edge terminal is in the time domain and the edge terminal of the second cell. The scheduling resources are staggered, wherein the first cell is adjacent to the second cell, so that the base station An edge terminal is scheduled on the scheduling resource. It can be seen that the base station effectively reduces the inter-cell interference by shifting the scheduling resources of the edge terminals of the first cell and the second cell in the time domain.

Optionally, the base station of the first cell determines the scheduling resource of the edge terminal, including:

The base station determines the scheduling resource of the edge terminal according to the physical cell identifier PCI of the first cell, where the PCI of the first cell and the PCI of the second cell have different operation results after the same modulo operation.

In the embodiment of the present invention, the PCI between the cells is different according to the PCI planning in the LTE system, and the results of the PCI between the adjacent cells after the same modulo operation are different, for example, the modulo of the MOD 3 is performed. In the calculation, the obtained value is one of 0, 1, and 2, wherein the values obtained by the neighboring cells are different, and the base station can effectively distinguish the scheduling occasions of different cells between adjacent cells by the modulo operation.

Optionally, the determining, by the base station, the scheduling resources of the edge terminal according to the PCI of the first cell, including:

When the first scheduling resource and the PCI of the first cell are the same in the same modulo operation, the first scheduling resource is determined to be a scheduling resource of the edge terminal, where the first scheduling resource is a subframe resource.

In the embodiment of the present invention, the base station can calculate a cell that needs to be scheduled by the base station in a certain subframe by using a calculation formula, such as: (frame number *10 + subframe number) MOD N=PCI MOD N, and The inter-cell PCI has different results under the same modulo operation, so the base station can realize the timing of staggering the scheduling of neighboring cells on the subframe.

Optionally, the method further includes:

The base station determines scheduling resources of the non-edge terminal;

On the scheduling resource of the non-edge terminal, the base station schedules the non-edge terminal of the first cell.

In the embodiment of the present invention, the base station may further determine a scheduling resource of the non-edge terminal in the same cell as the edge terminal, where the scheduling resource other than the scheduling resource used by the edge terminal may be determined as the scheduling resource used by the non-edge terminal. Thereby reducing interference between edge terminals and non-edge terminals between the same cell.

Optionally, the base station determines scheduling resources of the non-edge terminal, including:

When the second scheduling resource and the PCI of the first cell are different in the operation result of the same modulo operation, determining that the second scheduling resource is a scheduling resource of the non-edge terminal.

In the embodiment of the present invention, the base station determines that the scheduling resource of the edge terminal is calculated and the cell The same subframe obtained by the PCI in the same modulo operation is used as the scheduling resource. Similarly, the base station can use the subframe that is different from the result obtained by the PCI in the same modulo operation as the scheduling resource of the non-edge terminal. The second scheduling resource. Here, the second scheduling resource may also be a subframe.

Optionally, the scheduling resource of the edge terminal of the first cell occupies the same bandwidth in the frequency domain as the scheduling resource of the edge terminal of the second cell in the frequency domain.

In the embodiment of the present invention, the base station can schedule the neighboring inter-cell edge terminal by using the scheduling resource occupying the same bandwidth in the frequency domain, and the base station can ensure that the edge terminal of the first cell is not received when the edge terminal of the first cell is scheduled. Interference of edge terminals of adjacent second cells. And the scheduled bandwidth can be the entire bandwidth of the base station.

A second aspect of the present invention provides a base station, including:

a first determining module, configured to determine, when the edge terminal to be scheduled in the first cell, the scheduling resource of the edge terminal, where the scheduling resource of the edge terminal is staggered in the time domain and the scheduling resource of the edge terminal of the second cell, Wherein the first cell is adjacent to the second cell;

The first scheduling module is configured to schedule the edge terminal on the scheduling resource.

Optionally, the first determining module is specifically configured to determine, according to the physical cell identifier PCI of the first cell, the scheduling resource of the edge terminal, where the PCI of the first cell and the PCI of the second cell are after the same modulo operation The result of the operation is different.

Optionally, the first determining module is specifically configured to: when the first scheduling resource and the PCI of the first cell have the same operation result of the same modulo operation, determine that the first scheduling resource is a scheduling resource of the edge terminal, where The first scheduling resource is a subframe resource.

Optionally, the base station further includes:

a second determining module, configured to determine a scheduling resource of the non-edge terminal;

The second scheduling module is configured to schedule the non-edge terminal of the first cell on the scheduling resource of the non-edge terminal.

Optionally, the second determining module is configured to determine that the second scheduling resource is a scheduling resource of the non-edge terminal when the second scheduling resource and the PCI of the first cell are different in the operation result of the same modulo operation.

A third aspect of the present invention provides a base station, including:

a processor, a memory, and a communication interface;

Wherein, the memory is used to store the program, and the processor calls the memory stored program to perform any of the above methods, for example, for:

When there is an edge terminal to be scheduled in the first cell, the scheduling resource of the edge terminal is determined, and the scheduling resource of the edge terminal is staggered in the time domain with the scheduling resource of the edge terminal of the second cell, where the first cell and the second cell Adjacent

The edge terminal is scheduled on the scheduling resource.

Optionally, the processor is further configured to determine scheduling resources of the non-edge terminal;

The non-edge terminal of the first cell is scheduled on the scheduling resource of the non-edge terminal.

Optionally, the processor is further configured to determine, according to the physical cell identifier of the first cell, the scheduling resource of the edge terminal, where the PCI of the first cell and the PCI of the second cell have different operation results after the same modulo operation.

Optionally, the processor is further configured to: when the first scheduling resource and the PCI of the first cell are the same in the same modulo operation, determine that the first scheduling resource is a scheduling resource of the edge terminal, where the first The scheduling resource is a subframe resource.

Optionally, the processor is further configured to: when the second scheduling resource and the PCI of the first cell are different in the operation result of the same modulo operation, determine that the second scheduling resource is a scheduling resource of the non-edge terminal.

A fourth aspect of the present invention provides a storage medium for storing a program. In particular, the program can include program code, the program code including computer operating instructions. The storage medium may be a random access memory (RAM) or a non-volatile memory.

In the technical solution provided by the embodiment of the present invention, when there is an edge terminal to be scheduled in the first cell, the base station of the first cell determines the scheduling resource of the edge terminal, and the scheduling resource of the edge terminal is in the time domain and the second The scheduling resources of the edge terminals of the cell are staggered, wherein the first cell is adjacent to the second cell, so that the base station schedules the edge terminal on the scheduling resource. Therefore, the base station effectively reduces the inter-cell dryness by staggering the scheduling resources of the edge terminals of the first cell and the second cell in the time domain. Disturb.

DRAWINGS

FIG. 1 is a schematic diagram of an application scenario in an embodiment of the present invention;

2 is a schematic diagram of distribution of edge terminals and central terminals in a cell according to an embodiment of the present invention;

3 is a schematic diagram of scheduling resources used by edge terminals in a soft frequency reuse SFR according to an embodiment of the present invention;

4 is a schematic diagram of scheduling resources used by an edge terminal in a partial frequency reuse FFR according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of scheduling resources used by an edge terminal in a method for scheduling a terminal according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an embodiment of a method for scheduling a terminal according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of PCI taking MOD 3 in PCI planning according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of a scheduling timing table of a base station when a PCI takes MOD 3 according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of a scheduling timing table of a base station when a PCI takes MOD 6 according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic diagram of PCI taking MOD 12 according to an embodiment of the present invention; FIG.

11 is a schematic diagram of an embodiment of a base station according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of another embodiment of a base station according to an embodiment of the present disclosure;

FIG. 13 is a schematic diagram of another embodiment of a base station according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly described with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The terms "first", "second", "third", "fourth", etc. (if present) in the specification and claims of the present invention and the above figures are used to distinguish similar objects without having to use To describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, surgery The terms "including" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps that are clearly listed. Or units, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

Hereinafter, some of the terms in the present application will be explained to be understood by those skilled in the art.

1) A terminal, also called a User Equipment (UE), is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, an in-vehicle device, and the like. Common terminals include, for example, mobile phones, tablets, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, and the like.

2), a base station, also known as a radio access network (RAN) device, is a device that accesses a terminal to a wireless network, including but not limited to: an evolved Node B (eNB), Radio network controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), home base station (for example, Home evolved) NodeB, or Home Node B, HNB), BaseBand Unit (BBU). In addition, a Wifi Access Point (AP) or the like may also be included.

3) "Multiple" means two or more. "and/or", describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. The character "/" generally indicates that the contextual object is an "or" relationship.

It should be understood that although the foregoing background technology section is described by taking the LTE system as an example, those skilled in the art should know that the present invention is applicable not only to the LTE system but also to other wireless communication systems, such as the global mobile communication system ( Global System for Mobile Communication (GSM), Universal Mobile Telecommunications System (UMTS), Code Division Multiple Access (CDMA) system, Cellular-based Narrow Band Internet of Things (Narrow Band Internet of Things, NB-IoT) and new network systems. The following describes an embodiment of the LTE system as an example.

In the LTE system, due to the adoption of OFDM technology, the frequency reuse factor is 1, in the cell The edge terminals of the edge are disturbed by the neighbors. As shown in FIG. 1, the terminal 1 is an edge terminal covering the coverage of the base station 1, and the terminal 2 is an edge terminal covering the coverage of the base station 2. In the uplink direction, the uplink signal sent by the terminal 1 interferes with the uplink transmission of the terminal 2; in the downlink direction, the downlink signal transmitted by the base station 1 received by the terminal 1 is interfered by the downlink transmission of the terminal 2 to the terminal 2.

In the prior art, in order to solve the interference of the edge terminals between the adjacent cells, the LTE system uses ICIC technology to reduce interference between adjacent cells, wherein the ICIC can be further divided into Soft Frequency Reuse (SFR) and Partial Frequency Reuse (FFR).

The cell center user (CCU), that is, the central terminal, is distributed in the cell center; and the CEU, that is, the edge terminal, is distributed at the cell edge, as shown in FIG. 2 .

When the ICIC adopts the SFR, in the adjacent three cells, the bandwidth can be divided into three, the edge terminal of each cell uses one copy, and the central terminal uses the remaining two copies. As shown in FIG. 3, the scheduling resource of the 20M bandwidth is taken as an example, and is divided into three parts, wherein the edge terminals of the cell 1, the cell 2, and the cell 3 respectively use one of the bandwidths as scheduling resources, and the cells 1 to 3 The central terminal uses two other bandwidths than one used by the edge terminal of the cell as scheduling resources.

When the ICIC adopts the FFR, in the adjacent three cells, the bandwidth can be divided into four, the edge terminal of each cell uses one copy, and the central terminals of the three cells use one copy each. As shown in FIG. 4, the scheduling resource of the 20M bandwidth is taken as an example, and is divided into four parts, wherein the edge terminals of the cell 1, the cell 2, and the cell 3 respectively use one of the bandwidths as the scheduling resource, and the cell 1 to The central terminal of 3 uses one of the bandwidths separately as a scheduling resource.

In the embodiment of the present invention, as shown in FIG. 5, the cell 1, the cell 2, and the cell 3 are respectively adjacent to each other, and the 20M bandwidth is taken as an example, and the scheduling of the edge terminals of the cell 1, the cell 2, and the cell 3 is staggered in the time domain. Resources. For example, in the time domain, the cell 1 first uses the 20M bandwidth as a scheduling resource, and then the cell 2 uses the 20M bandwidth as a scheduling resource, and then the cell 3 uses the 20M bandwidth as a scheduling resource. Cell 1, cell 2, and cell 3 sequentially use the 20M bandwidth as scheduling resources and cycle to reduce inter-cell interference. When the 20M bandwidth is used as the scheduling resource in a certain cell, the other cells do not use the 20M bandwidth as the scheduling resource.

It should be noted that the present invention is also applicable to a narrowband LTE system such as LTE 1.4M or LTE 3M. The above-mentioned 20M non-narrowband LTE system does not constitute a limitation of the system bandwidth in the embodiment of the present invention.

For the sake of understanding, the specific process in the embodiment of the present invention is described below. Referring to FIG. 6, an embodiment of the method for scheduling a terminal in the embodiment of the present invention includes:

601. The base station determines whether each cell controlled by the base station has an edge terminal to be scheduled.

602. When the base station determines that there is an edge terminal to be scheduled in the first cell, the base station determines a scheduling resource of the edge terminal of the first cell, and the scheduling resource is in the neighboring cell of the first cell, for example, the edge terminal of the second cell. Scheduling resources are staggered in the time domain;

603. The base station schedules an edge terminal of the first cell on the determined scheduling resource.

In this embodiment, the number of cells controlled by the base station is not limited. For example, the base station can control three cells, that is, three cells can exist in the base station; for example, the base station can control six cells, that is, the base station can There are 6 cells and the like.

In the above step 601, the base station may determine, by using the following manner, whether each cell in the base station has an edge terminal to be scheduled, including but not limited to:

The base station can determine whether the terminal is an edge terminal at the cell edge by using the A2 or A3 event. The A2 event is when the serving cell quality is lower than a preset threshold, and the terminal is an edge terminal. When the A3 event is that the quality of service in the neighboring cell is higher than the quality of service of the serving cell in which the terminal is located, the terminal is at the edge of the two cells and is an edge terminal.

Alternatively, the base station may further obtain a signal to interference plus noise ratio (SINR) of the terminal of the cell, and if the SINR is less than or equal to the SINR threshold, determine that the terminal is an edge terminal; otherwise, determine that the terminal is not Edge terminal. It can be understood that if the SINR is low, it indicates that the terminal receives less useful signals and the performance is poor, the terminal is an edge terminal; if the SINR is high, the terminal receives many useful signals and has good performance, and the terminal is not an edge terminal. The base station of the cell may measure the SINR of the terminal, and may directly obtain the SINR of the pre-measured terminal. The size of the SINR threshold may be determined by the situation of each cell, and the present invention is not limited.

Alternatively, the base station may further receive a Reference Signal Received Power (RSRP) of the local cell reported by the terminal and an RSRP of the neighboring cell; if the difference between the RSRP of the local cell and the RSRP of the neighboring cell is less than or equal to The RSRP threshold value determines that the terminal is an edge terminal; otherwise, it determines that the terminal is not an edge terminal. It can be understood that the edge terminal is smaller than the central terminal. The base station of the area is far from the neighboring cell, so the difference between the RSRP of the local cell and the RSRP of the neighboring cell received by the edge terminal is relatively small, so that the difference between the RSRP of the local cell and the RSRP of the neighboring cell received by the edge terminal is The value is small. The size of the RSRP threshold may be determined by the situation of each cell. The RSRP may also be a Reference Signal Receiving Quality (RSRQ), which is not limited in the present invention.

Alternatively, the base station may obtain the pairing probability or the pairing gain of the terminal in the current cell. If the pairing probability or the pairing gain of the terminal is less than the pairing threshold, determine that the terminal is an edge terminal; otherwise, determine that the terminal is not an edge terminal. It can be understood that if the performance of the terminal is good, the probability that the terminal participates in VMIMO (Virtual Multiple-Input Multiple-Output) pairing is higher, and accordingly, the terminal participates in VMIMO pairing so that the system obtains the gain. The pairing probability or the pairing gain of the base station can be periodically calculated, and the periodic time period can be determined by the load condition of each cell; the pairing threshold corresponding to the pairing probability or the pairing threshold corresponding to the pairing gain The size of the value can be determined by the own situation of each cell, and the present invention is not limited.

The pairing probability is a ratio of resource blocks (RBs) obtained by the terminal in the second scheduling layer (which has been paired with other users and paired with another user) in the periodic time period. The terminal is at the sum of the first scheduling layer (first participating in user pairing) and the number of RBs obtained in the second scheduling layer. The pairing gain is the sum of the gain obtained by the system in the second scheduling layer in the periodic time period, and the gain obtained by the system in the first scheduling layer and the second scheduling layer in the system.

It should be noted that the base station where the second cell is located may be different from the base station where the first cell is located, and in this embodiment, the scheduling resources of the edge terminals of the neighboring cells may occupy the same bandwidth, that is, the first cell. The scheduling resources of the edge terminal and the scheduling resources of the edge terminals of the second cell may occupy the same bandwidth, for example, a bandwidth of 20M.

In the above step 602, the base station determines that the scheduling resource of the edge terminal of the first cell may be determined based on a Physical Cell Identifier (PCI) of the first cell.

Currently, the physical layer Cell ID of a cell can be divided into two parts: a cell group ID (Group ID) and an intra-group ID (Sector ID). The physical layer cell group may have 168, and each cell group may be composed of three IDs, so a total of 168*3=504 independent Cell IDs may be used, and the division formula may be as follows:

among them,

Represents the Cell ID;

The value of the cell group ID, which can be in the range of 0 to 167.

The ID of the group is in the range of 0 to 2; that is, PCI=3*Group ID+Sector ID.

The Cell ID, which is the PCI of the cell, can be used to distinguish different cells. In order to avoid PCI conflicts, the PCI may be planned in advance so that the PCIs of cells in a region range are different from each other. At the same time, it is possible to plan that the PCI of the neighboring cell has different operation results after the same modulo operation. In this embodiment, the scheduling resources of the neighboring cells may be staggered in the time domain based on the PCI planning.

For example, when the first scheduling resource and the PCI of the first cell have the same operation result of the same modulo operation, the first scheduling resource is determined to be a scheduling resource of the edge terminal of the first cell, where the first scheduling resource is a subframe. Resources. That is, the base station can stagger the scheduling resources in the time domain by using the following formula:

(frame number * 10 + subframe number) MOD N = PCI MOD N;

The frame number may be a sequence number of a radio frame in the scheduling resource, where the subframe number may be a sequence number of a subframe of the radio frame corresponding to the frame number, where the PCI is a PCI of the cell, and the MOD refers to a modulo operation, that is, The remainder of the modulo N operation.

According to the above formula, if the PCI is the PCI of the first cell, when the (frame number *10+subframe number) MOD N is equal to the operation result of the PCI modulo N of the first cell, the base station may determine the sub-frame number of the first cell. The subframe resource corresponding to the frame number is the first scheduling resource, and the base station may determine that the first scheduling resource is the scheduling resource of the edge terminal of the first cell.

Similarly, if the PCI is the PCI of the second cell, when the (frame number *10+subframe number) MOD N is equal to the operation result of the PCI modulo N of the second cell, the base station of the second cell can determine The subframe resource corresponding to the subframe number of the frame number is a scheduling resource of the edge terminal of the second cell. It can be understood that, because the PCI of the first cell in the PCI planning is different from the PCI of the second cell, and the operation result of the PCI modulo N of the first cell and the second cell is different, that is, the base station can implement the staggered first cell. A scheduling resource with an edge terminal of the second cell. It can be understood that, in an actual application, the second cell may be in the same base station as the first cell, or may be in a different base station than the base station of the first cell, which is not limited herein.

In the above step 603, if the base station determines the scheduling resource of the edge terminal of the first cell, that is, the first scheduling resource, the base station may schedule the edge terminal of the first cell on the first scheduling resource to implement the first cell and the first cell. The staggered resources of the edge terminals of the neighboring cells of a cell are staggered.

In the following, the above embodiments are described with MOD3 and MOD6 as examples, respectively, regarding other modulo transport It is similar to this and will not be described here. PCI planning can reduce interference such as MOD 3 and MOD 6. The MOD 3 interference is the downlink interference caused by the same result of the PCI modulo 3 of the neighboring cell. The group ID of the PCI is obtained according to a Secondary Synchronization Signal (SSS), and the ID of the group is obtained according to a Primary Synchronization Signal (PSS). The PSS can be used for time alignment and frequency synchronization. If the operation results of the PCI modulo 3 of the neighboring cells are the same, that is, the PSSs of the neighboring cells are the same, the mutual interference of the PSS will be caused.

MOD 6 interference, that is, when the time domain location is fixed, the downlink cell-specific reference signal (Reference Signal, RS) may have 6 freq shifts in the frequency domain, and the RS may be used to identify the terminal. If the values of the modulo operations obtained by the PCI MOD 6 of the neighboring cells are the same, the downlink cell-specific reference signals overlap in the frequency domain, causing mutual interference of the downlink RSs.

It should be understood that in order to reduce the above MOD 3 interference or MOD 6 interference, in PCI planning, the calculation results obtained by PCI MOD 3 or PCI MOD 6 of each cell in an area may be as shown in Table 1 and Table 2, respectively:

PCI规划结果 PCI planning results	00	11	22	33	44	55	66	77	88	…...
PCI MOD 3 PCI MOD 3	00	11	22	00	11	22	00	11	22	…...

Table 1

PCI规划结果 PCI planning results	00	11	22	33	44	55	66	77	88	99	1010	1111	…...
PCI MOD 6 PCI MOD 6	00	11	22	33	44	55	00	11	22	33	44	55	…...

Table 2

In the PCI planning, taking PCI to take MOD 3 as an example, as shown in FIG. 7, it can be ensured that the operation result of PCI MOD 3 of each cell and the neighboring cell is different.

In this embodiment, if the PCI of the first cell takes MOD 3, the base station may also take the MOD 3 of the scheduling resource, that is, the base station may set (frame number *10+subframe number) MOD 3, as shown in Table 3. :

table 3

Wherein, if the MOD 3 in Table 3 (frame number *10 + subframe number) is the same as the PCI MOD 3 in Table 1, ie (frame number * 10 + subframe number) MOD 3 = PCI MOD 3, the base station can determine In the first scheduling resource of the first cell corresponding to the value of the PCI MOD3 in the table, the base station may allocate the scheduling resource of the edge terminal of the first cell in the subframe corresponding to the subframe number in the first scheduling resource.

Then, the scheduling timing table of the edge terminal of the base station scheduling each cell may be specifically as shown in FIG. 8 , assuming that the CELL INDEX (cell index) is 0 for the first cell, the cell index is 1 for the second cell, and the cell index is 2 Representing a third cell, where the first cell to the third cell are adjacent cells. According to the schedule shown in FIG. 8, the base station may schedule the edge terminal of the first cell in the 0th subframe of the 0th frame, that is, determine the 0th subframe of the 0th frame as the first scheduling resource; The third subframe of the frame schedules the edge terminal of the first cell, that is, the third subframe of the 0th frame is determined as the first scheduling resource; and the edge terminal of the first cell is scheduled in the sixth subframe of the 0th frame, That is, the sixth subframe of the 0th frame is determined as the first scheduling resource; the edge terminal of the first cell is scheduled in the ninth subframe of the 0th frame, that is, the ninth subframe of the 0th frame is determined as the first scheduling The resource is configured to schedule the edge terminal of the first cell in the second subframe of the first frame, that is, to determine the second subframe of the first frame as the first scheduling resource or the like. That is, the scheduling resource of the edge terminal of the first cell whose cell index is 0 in FIG. 8 is the subframe represented by the black frame of the row in which the cell is located; the scheduling resource of the edge terminal of the second cell whose cell index is 1 is the row of the row of the cell The subframe represented by the black frame; the scheduling resource of the edge terminal of the third cell with the cell index of 2 is the subframe represented by the black frame of the row in which it is located. The edge terminals of the first cell to the third cell are periodically scheduled, and the scheduling resources of the edge terminals of the first cell and the second cell and the third cell are shifted in the time domain.

In this embodiment, if the PCI of the first cell is MOD 6, the base station may also take the MOD 6 of the scheduling resource, that is, the base station may set (frame number *10+subframe number) MOD 6, as shown in Table 4. :

Table 4

Wherein, if the MOD 6 in Table 4 (frame number *10 + subframe number) is the same as the PCI MOD 6 in Table 2, that is, (frame number * 10 + subframe number) MOD 6 = PCI MOD 6, the base station can determine The first scheduling resource of the first cell corresponding to the value of the PCI MOD6 in Table 2, the base station may be in the first scheduling resource. The subframe corresponding to the frame number allocates scheduling resources of the edge terminal of the first cell.

Then, the scheduling timing table of the edge terminal of the base station scheduling each cell may be specifically as shown in FIG. 9 , assuming that the CELL INDEX (cell index) is 0 for the first cell, the cell index is 1 for the second cell, and so on. According to the schedule shown in FIG. 9, the base station may schedule the edge terminal of the first cell in the 0th subframe of the 0th frame, and schedule the edge terminal of the first cell in the 6th subframe of the 0th frame. The second subframe of one frame schedules the edge terminal of the first cell, and the edge terminal of the first cell and the like are scheduled in the eighth subframe of the first frame. The scheduling of the edge terminal of the second cell is similar, so that the edge terminals of the first cell and the second cell are periodically scheduled, and the scheduling resources of the edge terminals of the first cell and the second cell are staggered in the time domain.

It should be noted that the foregoing steps may be implemented by the base station by using control software, and when the base station is scheduling the edge terminal of the cell, the 0th frame may be a radio frame when the base station starts the control software for scheduling, or the 0th frame. It is also possible that the base station selects a radio frame at any time as the 0th frame, which is not limited herein.

Optionally, in this embodiment, the non-edge terminal may be scheduled at a time other than the scheduling edge terminal. That is, the above method may further include the following steps:

The base station determines scheduling resources of the non-edge terminal;

On the scheduling resources of the non-edge terminal, the base station schedules the non-edge terminal of the first cell.

If the second scheduling resource and the PCI of the first cell have different operation results of the same modulo operation, the base station may determine that the second scheduling resource is a scheduling resource of the non-edge terminal of the first cell, that is, the first scheduling resource The second scheduling resource is a scheduling resource of the central terminal of the first cell, and the base station may schedule the central terminal of the first cell on the second scheduling resource. For example, if the PCI of the first cell takes MOD3, it is assumed that the value of the PCI MOD 3 of the first cell is 0, that is, the CELL INDEX (cell index) of the first cell is assumed to be 0, as shown in FIG. The first subframe and the second subframe of the 0th frame schedule the non-edge terminal of the first cell, and the non-edge terminal of the first cell is scheduled in the 4th subframe and the 5th subframe of the 0th frame, at 0th The seventh subframe and the eighth subframe of the frame schedule the non-edge terminal of the first cell, and the non-edge terminal of the first cell is scheduled in the 0th subframe and the 1st subframe of the first frame, etc., thereby The non-edge terminal of the first cell is periodically scheduled.

Optionally, in this embodiment, the scheduling resource of the first cell scheduled by the base station may also be a frame resource. For example, if the PCI of the first cell is MOD 3, the base station may set the frame number *MOD 3, as shown in Table 5:

帧号 Frame number	00	11	22	33	44	55	66	77	88	…...
帧号MOD 3Frame number MOD 3	00	11	22	00	11	22	00	11	22	…...

table 5

Wherein, if the frame number *MOD 3 in Table 5 is the same as the PCI MOD 3 in Table 1, that is, the frame number *MOD3 = PCI MOD 3, the base station can determine the first cell corresponding to the value of the PCI MOD 3 in Table 1. The frame number of the scheduling resource, the base station may allocate the scheduling resource of the edge terminal of the first cell in the frame corresponding to the frame number.

Optionally, if in the communication system, the neighboring base stations use frequency multiplexing, that is, the neighboring base stations use different frequencies to cover different cells, and if the N cells use unified frequency coverage, in the N cells. The PCI of each cell can take MOD N. For example, the N cells may be 12 neighboring cells. As shown in FIG. 10, the cell 0 to the cell 11 share the same frequency for communication. To avoid interference between the cell 0 and the cell 11, the PCI of the cell may be MOD. 12. It can be understood that the base station can also allocate the scheduling resources of the edge terminals of the 12 cells in sequence according to the operation result of the PCI MOD 12, and the scheduling resource can be a frame resource or a subframe resource, which is not limited herein. .

In this embodiment, when there is an edge terminal to be scheduled in the first cell, the base station of the first cell determines the scheduling resource of the edge terminal, and the scheduling resource of the edge terminal is in the time domain and the edge terminal of the second cell. The scheduling resource is staggered, wherein the first cell is adjacent to the second cell, so that the base station schedules an edge terminal on the scheduling resource. It can be seen that the base station can effectively reduce the inter-cell interference by shifting the scheduling resources of the edge terminals of the first cell and the second cell in the time domain.

The embodiment of the method for scheduling a terminal in the embodiment of the present invention is described. The following describes the base station in the embodiment of the present invention. Referring to FIG. 11, an embodiment of the base station in the embodiment of the present invention includes:

The first determining module 1101 is configured to determine, when the edge terminal to be scheduled in the first cell, the scheduling resource of the edge terminal, where the scheduling resource of the edge terminal is staggered with the scheduling resource of the edge terminal of the second cell in the time domain, Wherein the first cell is adjacent to the second cell;

The first scheduling module 1102 is configured to schedule the edge terminal on the scheduling resource.

Optionally, in some embodiments of the present invention, the first determining module 1101 is specifically configured to determine, according to the physical cell identifier PCI of the first cell, a scheduling resource of the edge terminal, where the PCI of the first cell The operation result after the same modulo operation is different from the PCI of the second cell.

Optionally, in some embodiments of the present invention, the first determining module 1101 is specifically configured to determine, when the first scheduling resource and the PCI of the first cell have the same operation result of the same modulo operation, determine the first scheduling. The resource is a scheduling resource of the edge terminal, where the first scheduling resource is a subframe resource.

Optionally, in some embodiments of the present invention, as shown in FIG. 12, the base station further includes:

a second determining module 1201, configured to determine scheduling resources of the non-edge terminal;

The second scheduling module 1202 is configured to schedule the non-edge terminal of the first cell on the scheduling resource of the non-edge terminal.

Optionally, in some embodiments of the present invention, the second determining module 1201 is specifically configured to determine, when the second scheduling resource and the PCI of the first cell are different in operation results of the same modulo operation, determine the second scheduling. The resource is a scheduling resource of the non-edge terminal.

Optionally, in some embodiments of the present invention, the scheduling resource of the edge terminal of the first cell occupies the same bandwidth in the frequency domain as the scheduling resource of the edge terminal of the second cell in the frequency domain.

In this embodiment, when there is an edge terminal to be scheduled in the first cell, the first determining module 1101 determines a scheduling resource of the edge terminal, and the scheduling resource of the edge terminal is in the time domain and the edge terminal of the second cell. The scheduling resource is staggered, wherein the first cell is adjacent to the second cell, so that the first scheduling module 1102 schedules the edge terminal on the scheduling resource. It can be seen that the base station can effectively reduce the inter-cell interference by shifting the scheduling resources of the edge terminals of the first cell and the second cell in the time domain.

The following describes the physical device of the base station in the embodiment of the present invention. Referring to FIG. 13, FIG. 13 is another embodiment of a base station according to an embodiment of the present invention.

The base station 13 includes a processor 1301, a memory 1302, and a communication interface 1303. The number of the processors 1301 may be one or more. One processor 1301 is exemplified in FIG.

The memory 1302 is used to store programs. In particular, the program can include program code, the program code including computer operating instructions. The memory 1302 may be a random access memory (RAM) or a non-volatile memory such as at least one disk storage. Only one memory is shown in the figure, of course, the memory can also be set to a plurality as needed. Memory 1302 can also be a memory in processor 1301.

In some embodiments of the invention, the processor 1301, the memory 1302, and the communication interface 1303 It can be connected by bus or other means, wherein the connection by bus is taken as an example in FIG. Communication interface 1303 may include an interface to communicate with the terminal, such as an interface that satisfies an air interface protocol; and may also include an interface to communicate with other network devices, such as an interface to communicate with other base stations.

The processor 1301 is configured to determine, when the edge terminal to be scheduled in the first cell, the scheduling resource of the edge terminal, where the scheduling resource of the edge terminal is offset from the scheduling resource of the edge terminal of the second cell in the time domain, where The first cell is adjacent to the second cell;

The processor 1301 schedules the edge terminal on the scheduling resource.

Optionally, in some embodiments of the present invention, the processor 1301 is further configured to determine, according to the physical cell identifier PCI of the first cell, a scheduling resource of the edge terminal, where the PCI of the first cell and the PCI of the second cell are the same. The result of the operation after the modulo operation is different.

Optionally, in some embodiments of the present invention, the processor 1301 is further configured to: when the first scheduling resource and the PCI of the first cell have the same operation result of the same modulo operation, determine that the first scheduling resource is the A scheduling resource of the edge terminal, where the first scheduling resource is a subframe resource.

Optionally, in some embodiments of the present invention, the processor 1301 is further configured to determine scheduling resources of the non-edge terminal;

The processor 1301 schedules the non-edge terminal of the first cell on the scheduling resource of the non-edge terminal.

Optionally, in some embodiments of the present invention, the processor 1301 is further configured to: when the second scheduling resource and the PCI of the first cell are different in the operation result of the same modulo operation, determine that the second scheduling resource is the Scheduling resources for non-edge terminals.

In this embodiment, when there is an edge terminal to be scheduled in the first cell, the processor 1301 determines the scheduling resource of the edge terminal, and the scheduling resource of the edge terminal in the time domain and the scheduling resource of the edge terminal of the second cell Staggered, wherein the first cell is adjacent to the second cell, such that the processor 1301 schedules an edge terminal on the scheduling resource. It can be seen that the processor 1301 in the base station 13 effectively reduces the inter-cell interference by shifting the scheduling resources of the edge terminals of the first cell and the second cell in the time domain.

It will be apparent to those skilled in the art that the above description is convenient and concise for the description. For the specific working process of the system, the device and the unit, reference may be made to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.

The above embodiments are only used to explain the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still The technical solutions described in the embodiments are modified, or the equivalents of the technical features are replaced by the equivalents. The modifications and substitutions of the embodiments do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A method for scheduling a terminal, comprising:

When the first cell has an edge terminal to be scheduled, the base station of the first cell determines the scheduling resource of the edge terminal, and the scheduling resource of the edge terminal in the time domain and the scheduling resource of the edge terminal of the second cell Staggered, wherein the first cell is adjacent to the second cell;

The base station schedules the edge terminal on the scheduling resource.
The method according to claim 1, wherein the base station of the first cell determines the scheduling resource of the edge terminal, including:

Determining, by the base station, the scheduling resource of the edge terminal according to the physical cell identifier PCI of the first cell, where the PCI of the first cell and the PCI of the second cell have different operation results after the same modulo operation .
The method according to claim 2, wherein the determining, by the base station, the scheduling resources of the edge terminal according to the PCI of the first cell, including:

When the first scheduling resource and the PCI of the first cell are in the same operation result of the same modulo operation, determining that the first scheduling resource is a scheduling resource of the edge terminal, where the first scheduling resource is a child Frame resource.
The method according to any one of claims 1 to 3, further comprising:

Determining, by the base station, scheduling resources of the non-edge terminal;

The base station schedules a non-edge terminal of the first cell on a scheduling resource of the non-edge terminal.
The method according to claim 4, wherein the determining, by the base station, scheduling resources of the non-edge terminal comprises:

When the second scheduling resource and the PCI of the first cell are different in the operation result of the same modulo operation, determining that the second scheduling resource is the scheduling resource of the non-edge terminal.
The method according to any one of claims 1 to 5, wherein the scheduling resource of the edge terminal of the first cell is occupied in the frequency domain and the scheduling resource of the edge terminal of the second cell is occupied in the frequency domain. The same bandwidth.
A base station comprising:

a first determining module, configured to determine the edge when there is an edge terminal to be scheduled in the first cell a scheduling resource of the edge terminal, where the scheduling resource of the edge terminal is offset from the scheduling resource of the edge terminal of the second cell in the time domain, where the first cell is adjacent to the second cell;

The first scheduling module is configured to schedule the edge terminal on the scheduling resource.
The base station according to claim 7, wherein the first determining module is specifically configured to determine, according to the physical cell identifier PCI of the first cell, a scheduling resource of the edge terminal, where the PCI of the first cell The operation result after the same modulo operation is different from the PCI of the second cell.
The base station according to claim 8, wherein the first determining module is specifically configured to: when the first scheduling resource and the PCI of the first cell have the same operation result of the same modulo operation, determine the The first scheduling resource is a scheduling resource of the edge terminal, where the first scheduling resource is a subframe resource.
The base station according to any one of claims 7 to 9, wherein the base station further comprises:

a second determining module, configured to determine a scheduling resource of the non-edge terminal;

The second scheduling module is configured to schedule the non-edge terminal of the first cell on the scheduling resource of the non-edge terminal.
The base station according to claim 10, wherein the second determining module is configured to determine, when the second scheduling resource and the PCI of the first cell are different in operation results of the same modulo operation The second scheduling resource is a scheduling resource of the non-edge terminal.
The base station according to any one of claims 7 to 11, wherein the scheduling resource of the edge terminal of the first cell is occupied in the frequency domain and the scheduling resource of the edge terminal of the second cell is occupied in the frequency domain. The same bandwidth.