WO2018072686A1

WO2018072686A1 - Method and device for satellite communication system data scheduling and base station

Info

Publication number: WO2018072686A1
Application number: PCT/CN2017/106546
Authority: WO
Inventors: 段敏; 张豪杰
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-10-21
Filing date: 2017-10-17
Publication date: 2018-04-26
Also published as: CN107979874A; CN107979874B

Abstract

Disclosed are a method and device for satellite communication system data scheduling and a base station. The method comprises: determining, on the basis of the forward signal-to-noise ratio of a channel in which data of an accessing terminal is found and of a preset criterion, scheduling levels of the data; determining a scheduling priority of the data on the basis of a QoS attribute of the data in each of the scheduling levels; selecting the scheduling level of which the frame scheduling fill efficiency is greatest among the scheduling levels to serve as a current scheduling level, making a frame of the current scheduling level as a current frame, and scheduling, on the basis of the highness/lowness of the level number of the scheduling level and of the highness/lowness of the scheduling priority, data of the current scheduling level and of the scheduling level of a level number greater than the current scheduling level. The present application not only ensures the QoS attribute of different application data, but also effectively increases system spectrum utilization rate, thus satisfying system demands with respect to spectrum utilization rate and to bandwidth resource application maximization.

Description

Satellite communication system data adjustment method, device and base station

Technical field

The present application relates to the field of satellite communication and wireless communication technologies, for example, to a satellite communication system data scheduling method, apparatus, and base station.

Background technique

In the DVB-RCS2 standard protocol, the satellite communication system forward adopts TDM (Time Division Multiplexed) transmission, with the frame as the minimum transmission unit, the number of symbols per frame is fixed, and can only correspond to one modulation coding mode MCS. (Modulation Codes Schema, modulation coding mode), wherein MCS includes QPSK, 8PSK, 16APSK, 32APSK four modulation methods and a variety of CR (Code Rates, code rate) combined modulation coding mode, each modulation coding mode has a corresponding letter Noise ratio demodulation threshold.

At present, the satellite communication system supports two scheduling modes: ACM (Adaptive Coding and Modulation) and CCM (Constant Coding and Modulation). However, in the CCM scheduling mode, the spectrum utilization rate is low, which is a serious problem for satellite communication systems where bandwidth resources are scarce. In the ACM scheduling mode, the scheduling frame hole problem often affects the utilization of bandwidth resources and indirectly reduces the spectrum efficiency. Moreover, when the same access terminal has multiple QoS (Quality of Service) attributes to be scheduled, the current scheduling frame has problems in scheduling scheduling of data to be scheduled for different QoS attributes, if all QoS of the access terminal is selected. The scheduling of the attribute to be scheduled in the same frame will inevitably affect the user's QoS requirements.

Summary of the invention

The present disclosure is intended to address at least the problems of low spectrum utilization and QoS requirements affecting users existing in the related art. To this end, the present disclosure proposes a satellite communication system data scheduling method, apparatus, and base station.

A data communication method for a satellite communication system according to an embodiment of the present disclosure includes:

Determining a scheduling level of the data according to a forward signal to noise ratio and a preset condition of a channel where the data of the access terminal is located;

Determining a scheduling priority of the data according to a QoS attribute of the data in each of the scheduling levels;

Selecting a scheduling class layer with the highest scheduling filling efficiency of the frame in the scheduling class layer as the current scheduling class layer, and using the frame of the current scheduling class layer as the current frame, according to the level of the scheduling class layer The scheduling priority level is scheduled for the current scheduling class layer and the data of the scheduling class layer whose level is higher than the current scheduling class layer.

The above method, wherein the preset condition is:

The forward signal-to-noise ratio of the channel where the data of the access terminal is located satisfies the relationship: the signal-to-noise ratio demodulation threshold of the scheduling class layer of the x+1 level > the scheduling class layer of the forward signal to noise ratio ≥ x level The signal-to-noise ratio demodulation threshold value, the scheduling level corresponding to the data is x level;

When the forward signal to noise ratio is greater than or equal to the signal to noise ratio demodulation threshold of the scheduling level of the highest level, the scheduling class layer corresponding to the data is the scheduling level of the highest level.

The above method, wherein the level of the level of the scheduling class layer and the level of the scheduling priority are higher for the current scheduling class layer and the scheduling level of the current scheduling class layer The steps for scheduling data include:

Arranging data of the current scheduling class layer and the higher scheduling class layer of the current scheduling class layer in descending order of the number of stages, the data of the scheduling class layer of each level is in accordance with the scheduling The priority is scheduled from high to low.

The above method, wherein the step of scheduling data of the current scheduling class layer and the higher-order scheduling layer according to the level of the scheduling class layer and the scheduling priority includes:

And scheduling, according to the scheduling priority, the current scheduling class layer and the data of the scheduling class layer having a higher level than the current scheduling class layer, and the data of each scheduling priority level according to the scheduling The number of levels of the scheduling class is scheduled from low to high.

The above method, wherein the scheduling fill efficiency is proportional to a ratio of a data volume to be scheduled in the scheduling class layer to a scheduling data block of a frame of the scheduling class layer.

In the above method, the voice service data, the interactive data, and the FTP data are sequentially lowered according to respective QoS attributes.

The above method, wherein the level of the hierarchy of the scheduling class layer is positively correlated with the signal to noise ratio demodulation threshold of the scheduling class layer, and is also positively correlated with the spectral efficiency of the scheduling class layer.

The embodiment of the present disclosure further provides a satellite communication system data scheduling device, where the device includes:

a scheduling class layer dividing unit configured to determine a scheduling level of the data according to a forward signal to noise ratio of the channel where the data of the access terminal is located and a preset condition;

a scheduling priority dividing unit configured to determine a scheduling priority of the data according to a QoS attribute of the data in each of the scheduling levels;

a data scheduling unit configured to select a scheduling class layer having a maximum scheduling filling efficiency of a frame in the scheduling class layer as a current scheduling class layer, and a frame of the current scheduling class layer as a current frame, according to the scheduling class layer The level of the series and the level of the scheduling priority are scheduled for the current scheduling class layer and the data of the scheduling class layer having a higher level than the current scheduling class.

The above device, wherein the preset condition is:

The above apparatus, wherein the data scheduling unit may be configured to: schedule the data of the current scheduling class layer and the higher scheduling class layer of the current scheduling class layer in order from the lowest to the highest, respectively The data of the scheduling class layer of the level is scheduled from high to low according to the scheduling priority.

The above apparatus, wherein the data scheduling unit may be configured to sequentially perform data of the current scheduling class layer and the higher scheduling class layer of the current scheduling class layer from high to low according to the scheduling priority Scheduling, each of the scheduling priority data is scheduled in descending order of the number of levels of the scheduling class layer.

The above apparatus, wherein the apparatus further includes a scheduling filling efficiency calculating unit configured to calculate a ratio of a data volume to be scheduled in the scheduling class layer to a scheduling data block of a frame of the scheduling class layer, and according to the ratio Confirm the scheduling fill efficiency.

The embodiment of the present disclosure further provides a base station, including the foregoing satellite communication system data scheduling device.

Embodiments of the present disclosure also provide a computer readable storage medium storing computer executable instructions arranged to perform the above method.

An embodiment of the present disclosure further provides an electronic device, including:

At least one processor;

a memory communicatively coupled to the at least one processor; wherein

The memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to cause the at least one processor to perform the method described above.

The present disclosure divides data into different scheduling class layers by forward-receiving the signal-to-noise ratio of the channel where the data of the access terminal is located, and each scheduling class layer further divides different scheduling priorities according to the QoS attributes of the data, and then according to the frame. The size of the scheduling fill efficiency selects the current frame and the current scheduling class, and schedules data for the scheduling priorities of the current scheduling class and higher scheduling classes. The method realizes dynamic selection of scheduling data, which can not only ensure the QoS attributes of different application data, but also effectively improve the system spectrum utilization. The method is applicable to satellite communication systems with large coverage and diversity of coverage, which meets the requirements of the system for maximizing spectrum utilization and bandwidth resource application.

BRIEF abstract

FIG. 1 is a flowchart of a data communication method for a satellite communication system according to an embodiment of the present disclosure;

2 is a flowchart of a data communication method of a satellite communication system in Embodiment 1 of the present disclosure;

3 is a flowchart of a data communication method of a satellite communication system in Embodiment 2 of the present disclosure;

4 is a structural block diagram of a data communication apparatus for a satellite communication system according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.

detailed description

The embodiments of the present disclosure are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative only, and are not to be construed as limiting.

Please refer to FIG. 1 , which is a flowchart of a data communication method for a satellite communication system according to an embodiment of the present disclosure, including steps S101 to S103 .

Step S101: Determine a scheduling level of data of the access terminal according to a forward signal to noise ratio of a channel where the data of the access terminal is located and a preset condition. In this step, the conditions are as follows:

Since the scheduling class layer is provided in plurality, each scheduling class layer corresponds to a modulation coding mode, a code rate, a spectrum efficiency, a frame, and a signal to noise ratio demodulation threshold. The level x of the scheduling class layer is positively correlated with the signal to noise ratio demodulation threshold of the scheduling class layer, and is also positively correlated with the spectral efficiency of the scheduling class layer. The larger the signal-to-noise ratio demodulation threshold of the scheduling class, the higher the number of stages and the greater the spectral efficiency. The data of the accessed terminal is divided into different scheduling class layers according to preset conditions.

Step S102: Determine a scheduling priority of the data according to a QoS attribute of the data in each of the scheduling levels. In this step, the scheduling priority is set according to the QoS attribute.

QoS attributes include attributes such as reliability, throughput, latency, delay variation, and loss. To meet the requirements of users for different service quality of different applications, the network side allocates and schedules resources according to user requirements, and provides different service quality for different data streams, for example, prioritizing data packets with strong real-time and important importance; Common data packets with low real-time performance provide lower processing priority. In general, the priority of voice service data, interactive data, and FTP data is sequentially reduced.

Step S103, selecting a scheduling class layer with the highest scheduling filling efficiency of the frame in the scheduling class layer as the current scheduling class layer, and using the frame of the current scheduling class layer as the current frame, according to the level of the scheduling class layer. The level of the high and low and the scheduling priority is higher than the current scheduling class level and the number of stages The data of the scheduling class layer of the higher order number of the current scheduling class layer is scheduled.

In the above steps, the scheduling filling efficiency of the frame is proportional to the ratio of the amount of data to be scheduled in the scheduling class layer to the scheduling data block of the frame corresponding to the scheduling class layer, and the scheduling filling efficiency of the frame is determined by the ratio, and the ratio is larger, corresponding to The scheduling fill efficiency of the frames of the scheduling class layer is greater.

In the implementation process, if there is two or more equal maximum values of the ratio of the data volume to be scheduled in the scheduling class layer to the scheduling data block of the corresponding frame of the scheduling class layer, then one of the scheduling class layers is selected as the current scheduling. Class level.

In the embodiment of the present disclosure, the satellite communication system is provided with a plurality of scheduling class layers, and each scheduling class layer is further provided with a plurality of scheduling priorities. Each scheduling class layer corresponds to a forward signal to noise ratio interval, and the network side divides the data into data in different scheduling class layers in different scheduling class layers according to the forward signal to noise ratio of the channel where the data of the access terminal is located. Then, according to the QoS attribute, different scheduling priorities are divided, and the current frame and the current scheduling class are selected according to the scheduling filling efficiency of the frame, and the scheduling priority selection scheme of the current scheduling class and the higher scheduling class is scheduled. For the scheduling of the next frame, the method is performed according to the scheduling method of the current frame. This not only has the flexible characteristics of ACM, but also achieves the effect of high CCM filling efficiency, and improves the system bandwidth utilization on the basis of ensuring the data QoS attributes.

These and other aspects of the embodiments of the present disclosure will be apparent from the description and drawings. In the description and drawings, some specific embodiments of the embodiments of the present disclosure are disclosed to illustrate some embodiments of the embodiments of the present disclosure, but the scope of the embodiments of the present disclosure is not limited thereto. Rather, the embodiment of the present disclosure includes all variations, modifications, and equivalents falling within the scope of the appended claims.

Example 1

In this embodiment, the network side divides three scheduling class layers according to information such as a signal to noise ratio condition and a modulation and coding mode, and each scheduling level includes a corresponding modulation and coding mode, a code rate, a spectrum efficiency, a frame, and a signal to noise ratio demodulation. Threshold.

For example, the three scheduling class layers are in descending order of order from low to high:

SchdLevel-1 is a level 1 scheduling class, and its corresponding modulation and coding mode is QPSK modulation, 1/4 code rate, spectral efficiency 0.47, SNR demodulation threshold -2dB, and the size of the scheduling data block of the frame is 1991. Bytes;

SchdLevel-2 is a 2-level scheduling class layer, and its corresponding modulation and coding mode is 8PSK modulation, 3/5 code rate, spectrum efficiency 1.71, signal-to-noise ratio demodulation threshold 5.5dB, and the size of the scheduling data block of the frame is 4826. Bytes;

SchdLevel-3 is a 3-level scheduling class layer, and its corresponding modulation and coding mode is 16APSK modulation, 2/3 code rate, spectrum efficiency 2.57, signal-to-noise ratio demodulation threshold 9dB, and the frame scheduling data block size is 5370. byte.

The network side access terminals A, B, and C have forward signal-to-noise ratios of 3dB, 6dB, and 11dB, respectively. Among them, A has voice service data 200Byte and FTP service 400Byte data, and B has interactive service 200Byte and FTP service. 200 bytes of data, C has 200 bytes of voice service and 200Bvte of interactive service.

The ForwordSINR of A is between SchdLevel-1 and SchdLevel-2, and A is divided into SchdLevel-1 scheduling class layer; B's ForwordSINR is between SchdLevel-2 and SchdLevel-3, and B is divided into SchdLevel-2 scheduling class layer; The ForwordSINR of C is greater than the demodulation threshold of the SchdLevel-3 scheduling class layer, which is divided into the SchdLevel-3 scheduling class layer.

The network side divides the scheduling priority in each scheduling level according to the application data QoS attribute. For example, voice service data requires small delay and high reliability. This type of data is divided into scheduling priority 1 (DataPriBuffer-1), which has the highest priority. For interactive application data, it is divided into scheduling priority 2 (DataPriBuffer-2). ), its priority is slightly lower, and the ordinary FTP data service is divided into scheduling priority 3 (DataPriBuffer-3), which has the lowest priority.

Then, the access terminal A to be scheduled data is divided into DataPriBuffer-1 and DataPriBuffer-3 under the SchdLevel-1 scheduling class layer, and the access terminal B to be scheduled data is divided into DataPriBuffer-2 and DataPriBuffer-3 under the SchdLevel-2 scheduling class layer. The access terminal C to be scheduled data is divided into the DataPriBuffer-1 and DataPriBuffer-2 queues under the SchdLevel-3 scheduling class layer.

The network side selects a scheduling class layer of the current frame according to a scheduling priority scheme, and determines a scheduling attribute of the current frame. In this embodiment, the scheduling class layer with the highest scheduling filling efficiency of the selected frame is the current scheduling class layer, and the corresponding frame is the current frame.

The scheduling filling efficiency of the frame is determined by the ratio N of the data to be scheduled in each scheduling class layer to the scheduling data block of the corresponding frame of the scheduling class layer. The larger the ratio N is, the larger the scheduling filling efficiency is. That is, N = the scheduling data block of the data volume to be scheduled/scheduled class layer corresponding frame in the scheduling class layer.

For example, the amount of data to be scheduled of the access terminals A, B, and C of the above access terminals is 200 Bytes of DataPriBuffer-1 to be scheduled under SchdLevel-1, and the amount of data to be scheduled under DataPriBuffer-3 is 400 Bytes, that is, a total of SchdLevel-1 600Byte to be scheduled data, N=600/1991=0.3; DataPriBuffer-2 under SchdLevel-2 has a data volume of 200 Bytes, and DataPriBuffer-3 has a data volume of 200 Bytes to be scheduled, that is, there are a total of 400 bytes of data to be scheduled under SchdLevel-2. N=400/4826=0.08; DataPriBuffer-1 under SchdLevel-3 has a data volume of 200 Bytes, DataPriBuffer-2 has a data volume of 200 Bytes to be scheduled, that is, there are a total of 400 bytes of data to be scheduled under SchdLevel-3, N=400/5370 =0.07; then the system will select SchdLevel-1 as the current scheduling frame MCS selection.

After the current scheduling class layer and the current frame are selected, the data scheduling of the DataPriBuffer priority under the current scheduling class layer is performed from high to low. When the current scheduling class layer has insufficient data to be scheduled, the current frame can sequentially schedule a higher level of scheduling class. The data of the layer until the current frame has no remaining scheduling resources or there is no data to be scheduled in the system. For example, if the current frame selects SchdLevel-1 as the scheduling class layer, it can schedule resources of 1991 bytes, and the priority order of scheduling data is:

Select 200 Byte data of DataPriBuffer-1 under SchdLevel-1 for scheduling;

Select 400Byte data of DataPriBuffer-3 under SchdLevel-1 for scheduling;

Select 200 Byte data of DataPriBuffer-2 under SchdLevel-2 for scheduling;

Select 200 Byte data of DataPriBuffer-3 under SchdLevel-2 for scheduling;

Select 200 Byte data of DataPriBuffer-1 under SchdLevel-3 for scheduling;

Select 200Byte data of DataPriBuffer-2 under SchdLevel-3 for scheduling.

The embodiment and the process of the embodiment are exemplified in detail above, and the following is the implementation flow of the embodiment. Referring to FIG. 2, it is a flowchart of a data communication method for a satellite communication system according to Embodiment 1 of the present disclosure, which includes the following steps:

Step S201, the network side sets three scheduling class layers, each scheduling class layer includes a corresponding modulation and coding mode, a code rate, a spectrum efficiency, a frame, and a signal to noise ratio demodulation threshold value, and the number of stages of the scheduling class layer x and The signal-to-noise ratio demodulation threshold and the spectral efficiency are positively correlated;

Step S202, each scheduling class layer sets three scheduling priorities according to the QoS attribute of the data;

Step S203, the network side determines the terminal according to the value of the forward signal to noise ratio of the channel where the data of the access terminal is located. The data is divided into the scheduling class layer of the corresponding series;

Step S204, dividing the data into corresponding scheduling priorities according to QoS attributes of data in each scheduling class layer;

Step S205, the scheduling class layer with the highest scheduling filling efficiency of the selected frame is the current scheduling class layer, and the corresponding frame is the current frame, and the data of the current scheduling class is scheduled according to the scheduling priority from high to low;

Step S206, determining whether the current frame has remaining scheduling resources or whether there is data to be scheduled in the system, if there are remaining scheduling resources or data to be scheduled, step S207 is performed; if there is no remaining scheduling resources and there is no data to be scheduled, End the scheduling of the current frame;

S207. The current frame sequentially schedules data of the higher-level scheduling class layer from high to low according to the scheduling priority, and returns to step S206.

In this embodiment, the function of maximizing the forward scheduling capacity is realized, which has the characteristics of high functional spectrum efficiency and high scheduling and filling efficiency of the frame, and improves system bandwidth utilization on the basis of ensuring the QoS attribute of the data application.

Example 2

According to different modulation and coding modes, code rates, spectral efficiency, frames, and signal to noise ratio demodulation thresholds, multiple scheduling priority schemes can be set.

SchdLevel-1 is a level 1 scheduling class, and its corresponding modulation and coding mode is QPSK modulation, 1/4 code rate, spectral efficiency 0.47, SNR demodulation threshold -2dB, and the size of the scheduling data block of the frame is 1991. Bytes; SchdLevel-2 is a 2-level scheduling class layer, and its corresponding modulation and coding mode is 8PSK modulation, 3/5 code rate, spectral efficiency 1.71, signal-to-noise ratio demodulation threshold 5.5dB, frame scheduling data block The size of the block is 4826 bytes; SchdLevel-3 is a level 3 scheduling class, and its corresponding modulation and coding mode is 16APSK modulation, 2/3 code rate, spectral efficiency 2.57, signal to noise ratio demodulation threshold 9dB, frame The size of the scheduling data block is 5370 bytes.

The network side access terminals A, B, and C have forward signal-to-noise ratios of 3dB, 6dB, and 11dB, respectively. Among them, A has voice service data 200Byte and FTP service 400Byte data, and B has interactive service 200Byte and FTP service. 200 bytes of data, C has 200 bytes of voice service and 200 bytes of interactive service.

The network side selects a scheduling class layer of the current frame according to a scheduling priority scheme, and determines a scheduling attribute of the current frame. In this embodiment, the scheduling class layer with the highest scheduling filling efficiency of the selected frame is the current scheduling class layer, and its corresponding frame is the current frame.

The scheduling filling efficiency of the frame is proportional to the ratio N of the amount of data to be scheduled in the scheduling class layer to the scheduling data block of the corresponding frame of the scheduling class layer, and the larger the ratio N is, the larger the scheduling filling efficiency is. That is, N = the scheduling data block of the scheduling class layer to be scheduled data amount/scheduling class layer corresponding frame.

For example, the amount of data to be scheduled of the access terminals A, B, and C of the above access terminals is 200 Bytes of DataPriBuffer-1 to be scheduled under SchdLevel-1, and the amount of data to be scheduled under DataPriBuffer-3 is 400 Bytes, that is, a total of SchdLevel-1 600Byte to be scheduled data, N=600/1991=0.3; DataPriBuffer-2 under SchdLevel-2 has a data volume of 200 Bytes, and DataPriBuffer-3 has a data volume of 200 Bytes to be scheduled, that is, there are a total of 400 bytes of data to be scheduled under SchdLevel-2. N=400/4826=0.08; DataPriBuffer-1 under SchdLevel-3 has a data volume of 200 Bytes to be scheduled. The DataPriBuffer-2 data to be scheduled is 200 Bytes, that is, there are a total of 400 Bytes of data to be scheduled under SchdLevel-3, N=400/5370=0.07; then the system selects SchdLevel-1 as the current scheduling frame MCS selection.

After the current scheduling class layer and the current frame are determined, the data of the highest scheduling priority level in the current scheduling class layer is scheduled; when the amount of data to be scheduled on the highest scheduling priority of the scheduling class layer is insufficient, the scheduling class layer of the higher level is sequentially scheduled. Data of the highest scheduling priority in the current scheduling class; and when there is no data to be scheduled in the current scheduling class hierarchy and all higher than the highest scheduling priority in the current scheduling class, the data of the secondary scheduling priority in the current scheduling class layer is scheduled; When the secondary scheduling priority in the current scheduling class hierarchy has no data to be scheduled, the data of the secondary scheduling priority in the scheduling class layer of the higher level is sequentially scheduled, and the loop is repeated until the frame has no remaining scheduling resources or is not in the system. Until the data can be scheduled. For example, if the current frame selects SchdLevel-1 as the scheduling class layer, it can schedule resources of 1991 bytes, and the priority order of scheduling data is:

Scheduling 200 Byte data of DataPriBuffer-1 under SchdLevel-1;

Scheduling 200 Byte data of DataPriBuffer-1 under SchdLevel-3;

Scheduling 200 Byte data of DataPriBuffer-2 under SchdLevel-2;

Scheduling 200 Byte data of DataPriBuffer-2 under SchdLevel-3;

Scheduling 400Byte data of DataPriBuffer-3 under SchdLevel-1;

The 200 Byte data of DataPriBuffer-3 under SchdLevel-2 is scheduled.

The embodiment and the process of the embodiment are exemplified in detail above, and the following is the implementation flow of the embodiment. Please refer to FIG. 3 , which is a flowchart of a data communication method for a satellite communication system according to Embodiment 2 of the present disclosure, including the following steps:

Step S301, the network side sets three scheduling class layers, each scheduling class layer includes a corresponding modulation and coding mode, a code rate, a spectrum efficiency, a frame, and a signal to noise ratio demodulation threshold value, and the number of levels of the scheduling class layer is high or low. Positively correlated with the signal-to-noise ratio demodulation threshold and the magnitude of the spectral efficiency;

Step S302, each scheduling class layer sets three scheduling priorities according to the QoS attribute of the data;

Step S303, the network side divides the data of the terminal into a scheduling level of the corresponding level according to the size of the forward signal to noise ratio of the channel where the data of the access terminal is located;

Step S304, dividing the data into corresponding scheduling priorities according to QoS attributes of data in each scheduling class layer;

Step S305, the scheduling class layer with the highest scheduling filling efficiency of the selected frame is the current scheduling class layer, and the corresponding frame is the current frame, and the highest scheduling class and the highest scheduling class are sequentially higher than the current scheduling class. Scheduling priority data for scheduling;

Step S306, determining whether the current frame has no remaining scheduling resources or whether it has been scheduled to the highest scheduling class layer and the lowest scheduling priority data in the system, if there is no remaining scheduling resources or has been scheduled to the highest level of the scheduling class and in the system The lowest scheduling priority data, ending the scheduling of the current frame; if there is no remaining scheduling resources and not scheduled to the highest level of the scheduling class and the lowest scheduling priority data in the system, step S307;

In step S307, the data of the current scheduling class and the higher scheduling class is lower than the scheduling priority of the data of the previous scheduling by one step, and the process returns to step S306.

In this embodiment, the data is scheduled according to the requirements of the data QoS attribute. On the basis of ensuring the QoS attribute of the data application, the data is scheduled according to the scheduling class hierarchy from low to high, which can improve the functional spectrum efficiency and the frame scheduling. Filling efficiency can also increase system bandwidth utilization.

It should be noted that, according to different modulation and coding modes, code rates, spectral efficiencies, frames, and signal to noise ratio demodulation thresholds, multiple scheduling classes may be set, not limited to the three schedulings mentioned in the embodiments of the present disclosure. class. Moreover, each scheduling class layer may set a plurality of scheduling priorities according to QoS attributes of the data, and is not limited to the three scheduling priorities mentioned in the embodiments of the present disclosure. A plurality of scheduling priority schemes can be combined according to different scheduling classes and scheduling priorities.

The embodiment of the present disclosure further provides a satellite communication system data scheduling device to implement the satellite communication data scheduling method. Referring to FIG. 4, the apparatus includes a scheduling class layer dividing unit, a scheduling priority dividing unit, and a data scheduling unit.

The scheduling class layer dividing unit is configured to determine a scheduling level of data of the access terminal according to a forward signal to noise ratio of the channel in which the data of the access terminal is located and a preset condition. The conditions are:

The scheduling priority dividing unit is configured to determine a scheduling priority of the data according to a QoS attribute of the data in each of the scheduling levels. The scheduling priority is set according to the QoS attribute.

The data scheduling unit is configured to select a scheduling class layer with the highest scheduling filling efficiency of the frame in the scheduling class layer as the current scheduling class layer, and use the frame of the current scheduling class layer as the current frame, according to the scheduling class layer The level of the series and the level of the scheduling priority are used to schedule data of the current scheduling class layer and the higher level of the scheduling class than the current scheduling class.

And the data scheduling unit schedules, according to the level of the level of the scheduling class layer and the scheduling priority, the data of the current scheduling class layer and the scheduling class layer whose level is higher than the current scheduling class layer. There are two types of processes. The first process step is as follows:

The second process step is as follows:

The apparatus further includes a scheduling fill efficiency calculation unit configured to calculate a ratio of a data volume to be scheduled in the scheduling class layer to a scheduling data block of a frame of the scheduling class layer, and according to the ratio and the scheduling filling efficiency In proportion, the larger the ratio, the greater the corresponding scheduling fill efficiency.

Accordingly, the present disclosure also provides a base station including the satellite communication system data scheduling apparatus of the above embodiment. One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program that instructs the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware or in the form of a software function module. The present disclosure is not limited to any specific form of combination of hardware and software.

Embodiments of the present disclosure also provide a computer readable storage medium storing computer executable instructions arranged to perform the method of any of the above embodiments.

The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

The embodiment of the present disclosure further provides a schematic structural diagram of an electronic device. Referring to FIG. 5, the electronic device includes:

At least one processor 50, which is exemplified by a processor 50 in FIG. 5; and a memory 51, may further include a communication interface 52 and a bus 53. The processor 50, the communication interface 52, and the memory 51 can complete communication with each other through the bus 53. Communication interface 52 can be used for information transmission. Processor 50 can invoke logic instructions in memory 51 to perform the methods of the above-described embodiments.

Furthermore, the logic instructions in the memory 51 described above may be implemented in the form of software functional units and sold or used as separate products, and may be stored in a computer readable storage medium.

The memory 51 is used as a computer readable storage medium for storing software programs, computer executable programs, and program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 50 executes the function application and the data processing by running the software program, the instruction and the module stored in the memory 51, that is, the satellite communication system data scheduling method in the above method embodiment.

The memory 51 may include a storage program area and an storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to use of the terminal device, and the like. Further, the memory 51 may include a high speed random access memory, and may also include a nonvolatile memory.

The technical solution of the embodiment of the present disclosure may be embodied in the form of a software product, the computer software The product is stored in a storage medium and includes one or more instructions for causing 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 the embodiments of the present disclosure. The foregoing storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like. A medium that can store program code, or a transitory storage medium.

While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope is defined by the claims and their equivalents.

Industrial applicability

The data communication method, device and base station of the satellite communication system disclosed in the present application can not only ensure the QoS attributes of different application data, but also effectively improve the system spectrum utilization rate, and meet the system requirements for spectrum utilization and bandwidth resource application maximization.

Claims

A data communication method for a satellite communication system, comprising:

Determining a scheduling level of the data according to a forward signal to noise ratio and a preset condition of a channel where the data of the access terminal is located;

Determining a scheduling priority of the data according to a QoS attribute of the data in each of the scheduling levels;

Selecting a scheduling class layer with the highest scheduling filling efficiency of the frame in the scheduling class layer as the current scheduling class layer, and using the frame of the current scheduling class layer as the current frame, according to the level of the scheduling class layer The scheduling priority level is scheduled for the current scheduling class layer and the data of the scheduling class layer whose level is higher than the current scheduling class layer.
The method of claim 1 wherein said predetermined condition is:

The forward signal-to-noise ratio of the channel where the data of the access terminal is located satisfies the relationship: the signal-to-noise ratio demodulation threshold of the scheduling class layer of the x+1 level > the scheduling class layer of the forward signal to noise ratio ≥ x level The signal-to-noise ratio demodulation threshold value, the scheduling level corresponding to the data is x level;

When the forward signal to noise ratio is greater than or equal to the signal to noise ratio demodulation threshold of the scheduling level of the highest level, the scheduling class layer corresponding to the data is the scheduling level of the highest level.
The method according to claim 1, wherein said current scheduling class layer and the number of levels are more than said current scheduling class layer according to a level of said scheduling class layer and a level of said scheduling priority The steps of scheduling data of the high scheduling class layer include:

Arranging data of the current scheduling class layer and the higher scheduling class layer of the current scheduling class layer in descending order of the number of stages, the data of the scheduling class layer of each level is in accordance with the scheduling The priority is scheduled from high to low.
The method according to claim 1, wherein said scheduling of data of a current scheduling class layer and a higher-order scheduling class layer according to a level of said scheduling class layer and a level of said scheduling priority The steps include:

And scheduling, according to the scheduling priority, the current scheduling class layer and the data of the scheduling class layer having a higher level than the current scheduling class layer, and the data of each scheduling priority level according to the scheduling The number of levels of the scheduling class is scheduled from low to high.
The method of claim 1 wherein said scheduling fill efficiency is proportional to a ratio of a quantity of data to be scheduled in said scheduling class layer to a scheduling data block of a frame of said scheduling class layer.
The method of claim 1, wherein the voice service data, the interactive data, and the FTP data are sequentially lowered in accordance with respective QoS attributes.
The method of claim 1, wherein the level of the hierarchy of the scheduling class layer is positively correlated with a signal to noise ratio demodulation threshold of the scheduling class layer, and also with the spectral efficiency of the scheduling class layer Positive correlation.
A data communication device for a satellite communication system, comprising:

a scheduling class layer dividing unit configured to determine a scheduling level of the data according to a forward signal to noise ratio of the channel where the data of the access terminal is located and a preset condition;

a scheduling priority dividing unit configured to determine a scheduling priority of the data according to a QoS attribute of the data in each of the scheduling levels;

a data scheduling unit configured to select a scheduling class layer having a maximum scheduling filling efficiency of a frame in the scheduling class layer as a current scheduling class layer, and a frame of the current scheduling class layer as a current frame, according to the scheduling class layer The level of the series and the level of the scheduling priority are scheduled for the current scheduling class layer and the data of the scheduling class layer having a higher level than the current scheduling class.
The apparatus of claim 8 wherein said predetermined condition is:

The forward signal-to-noise ratio of the channel where the data of the access terminal is located satisfies the relationship: the signal-to-noise ratio demodulation threshold of the scheduling class layer of the x+1 level > the scheduling class layer of the forward signal to noise ratio ≥ x level The signal-to-noise ratio demodulation threshold value, the scheduling level corresponding to the data is x level;

When the forward signal to noise ratio is greater than or equal to the signal to noise ratio demodulation threshold of the scheduling level of the highest level, the scheduling class layer corresponding to the data is the scheduling level of the highest level.
The apparatus according to claim 8, wherein the data scheduling unit is configured to: sequentially rank the data of the current scheduling class layer and the higher scheduling class level of the current scheduling class layer from low to high in order of rank The scheduling is performed, and the data of the scheduling class layer of each level is scheduled according to the scheduling priority from high to low.
The apparatus according to claim 8, wherein the data scheduling unit is configured to: sequentially schedule the current scheduling class layer and the number of levels higher than the current scheduling class layer in order from highest to lowest according to the scheduling priority The data of the class layer is scheduled, and the data of each of the scheduling priorities is sequentially scheduled from low to high according to the number of stages of the scheduling class layer.
The apparatus of claim 8, wherein the apparatus further comprises a scheduling fill efficiency calculation unit configured to calculate a ratio of a data volume to be scheduled in the scheduling class layer to a scheduling data block of a frame of the scheduling class layer And scheduling the filling efficiency according to the confirmation of the ratio.
A base station comprising the satellite communication system data scheduling apparatus according to any one of claims 8 to 12.
A computer readable storage medium storing computer executable instructions arranged to perform the method of any of claims 1-7.