CN112469134B

CN112469134B - Method and terminal for scheduling MAC layer data reasonably

Info

Publication number: CN112469134B
Application number: CN202011370191.2A
Authority: CN
Inventors: 傅福星
Original assignee: Ankexun Fujian Technology Co ltd
Current assignee: Ankexun Fujian Technology Co ltd
Priority date: 2017-12-20
Filing date: 2017-12-20
Publication date: 2022-05-03
Anticipated expiration: 2037-12-20
Also published as: CN108024384B; CN112469134A; CN112469135A; CN108024384A; CN112469135B

Abstract

The invention discloses a method and a terminal for reasonably scheduling MAC layer data, which stores received data into corresponding queues according to a logic channel where the received data is located, wherein the queues comprise a high-priority queue and a low-priority queue; calculating the actual time t for the MAC scheduler to process data in each TTI; according to the actual time t, the maximum time t0 allowed by the MAC scheduler to operate and the operation state of the MAC scheduler, the number of the UE allowed to be processed by the MAC scheduler in each TTI, the number of the data in the high-priority queue and the number of the data in the low-priority queue are adjusted, so that the system can distribute pressure to each TTI when the load is heavy at a certain moment, the stability of the system is ensured on one hand, the performance of the system is maximized on the other hand, the MAC scheduler can process more users and larger service data volume, the data can be reasonably scheduled, and the performance and the stability of the system are ensured.

Description

Method and terminal for scheduling MAC layer data reasonably

The scheme is a divisional application of a parent application named as 'a method and a terminal for MAC layer data scheduling', wherein the application number is 201711381230.7, the application date is 2017, 12 and 20.

Technical Field

The invention relates to the field of network communication, in particular to a method and a terminal for scheduling MAC layer data reasonably.

Background

With the global spread of the fourth generation mobile communication system (4G), the accelerated popularization and growth of 4G commercial networks, and the continuous growth of wireless data services. 4G has become the most widely used communication method in daily life. The practical deployment of 4G networks faces challenges in terms of coverage, capacity, construction difficulty, and off-grid, especially in areas of interior, indoor, and underground spaces of a portion of a building complex. The small-sized base station is used for compensating a blind area which cannot be covered by the macro station 4G signal. However, at the present time when 4G users are increasing, the small base station has the defects of limited capacity and poor processing performance, which is the greatest defect. Therefore, it is desirable to provide a method for improving the system performance of the base station to support more users.

Each sublayer in the LTE protocol stack has its own function, where the Media Access Control (MAC) layer is the main one related to user capacity performance. The scheduler processing mechanism of the MAC layer is reasonably designed, so that the processing capacity of the system can be improved, the number of accessed users can be increased, and the smoothness and stability of the system can be ensured.

The existing base station has limited capacity and poor performance. For places with slightly dense crowds, the user experience effect is often poor. This is mainly due to the single design of the scheduler at the MAC layer and the incomplete consideration of the scheduling policy. The design of the scheduler usually depends on the direct Processing of Data Units (PDUs) transmitted by a radio link control layer (RLC), or the direct processing of data Buffer Status (BSR) reported by an end User (UE). And the number of users handled per time interval (TTI) is fixed and inflexible. Each TTI handles either 1 UE or multiple UEs. The processing mechanism can timely transmit uplink and downlink data services of the user and is simpler. But can only handle fewer UEs or less data traffic. Once the number of UEs is increased, the data service of the user reaches a peak value, when the load of the scheduler is heavy, the data services required to be processed by different TTIs are uneven, there are more TTIs for processing data services and fewer TTIs for processing data services, fewer problems are not great, if more TTIs are processed by the MAC scheduler, the MAC scheduler cannot be timely processed to cause frequent desynchronization with a physical layer (PHY), data is not timely transmitted to be sent to the UE, data loss is caused, and the system is also prone to abnormality.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the method and the terminal for scheduling the MAC layer data reasonably are provided, the data can be scheduled reasonably, and the performance and the stability of a system are ensured.

In order to solve the technical problems, the invention adopts a technical scheme that:

a method for reasonably scheduling MAC layer data comprises the following steps:

s1, storing the received data into corresponding queues according to the logic channels where the received data are located, wherein the queues comprise a high-priority queue and a low-priority queue;

s2, calculating the actual time t for the MAC scheduler to process data in each TTI;

and S3, adjusting the number of the UE, the data number of the high-priority queue and the data number of the low-priority queue which are allowed to be processed by the MAC scheduler in each TTI according to the actual time t, the maximum time t0 allowed to be operated by the MAC scheduler and the operation state of the MAC scheduler.

In order to solve the technical problem, the invention adopts another technical scheme as follows:

a terminal for fair scheduling of MAC layer data scheduling, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor when executing the computer program implementing the steps of:

The invention has the beneficial effects that: the received data is stored in different high-low priority queues according to the logic channel where the received data is located, the number of the UE allowed to be processed by each TTI, the number of the data in the high-priority queues and the number of the data in the low-priority queues of the MAC scheduler are dynamically adjusted through the comparison of the actual time of the MAC scheduler for processing the data in each TTI with the maximum time allowed to be operated and the operation state of the MAC scheduler, and the pressure can be distributed to each TTI when the load of the system is heavy at a certain moment.

Drawings

Fig. 1 is a flowchart of a method for scheduling MAC layer data reasonably according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a terminal for scheduling MAC layer data reasonably according to an embodiment of the present invention;

description of reference numerals:

1. a terminal for MAC layer data scheduling; 2. A memory; 3. A processor.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

The most key concept of the invention is as follows: and dynamically adjusting the number of the UE, the data number of the high-priority queue and the data number of the low-priority queue which are allowed to be processed by the MAC scheduler in each TTI through the comparison between the actual time of the MAC scheduler for processing the data in each TTI and the maximum time allowed to be operated by the MAC scheduler and the operation state of the MAC scheduler.

Referring to fig. 1, a method for scheduling MAC layer data reasonably includes the steps of:

As can be seen from the above description, the beneficial effects of the present invention are: the received data is stored in different high-low priority queues according to the logic channel where the received data is located, the number of the UE allowed to be processed by each TTI, the number of the data in the high-priority queues and the number of the data in the low-priority queues of the MAC scheduler are dynamically adjusted through the comparison of the actual time of the MAC scheduler for processing the data in each TTI with the maximum time allowed to be operated and the operation state of the MAC scheduler, and the pressure can be distributed to each TTI when the load of the system is heavy at a certain moment.

Further, before step S1, the method further includes the steps of:

s0, initializing the MAC scheduler, presetting N number of UE allowed to be processed by the MAC scheduler in each TTI, N number of data of a high priority queue and M number of data of a low priority queue, and setting the initial running state of the MAC scheduler to be S0.

As can be seen from the above description, initializing the MAC scheduler not only ensures the sequential performance of the subsequent steps, but also can set different initial parameters according to different scenarios to adapt to different application scenarios, and thus the flexibility is high.

Further, the step S1 specifically includes:

the queues comprise a retransmission high-priority queue, a retransmission low-priority queue, a new transmission high-priority queue and a new transmission low-priority queue;

when receiving a data, judging whether the data is the retransmission data or the new transmission data, and storing the data into a corresponding high priority queue or a corresponding low priority queue according to a logic channel where the data is located.

As can be seen from the above description, the data is classified according to the received data types, each data type is subdivided, and each data type is stored in the high-priority queue or the low-priority queue according to the logical channel in which the data type is located, so that the data with high priority can be preferentially processed while different data services are distinguished, and the reliability of data transmission can be ensured.

Further, the step S2 specifically includes:

ind, when the MAC scheduler receives an instruction from the PHY layer, starts timing as the start of the current TTI of the MAC scheduler, and ends timing when the MAC scheduler completes data processing, and the time t obtained by timing is used as the actual time t for the MAC scheduler to process data in each TTI.

As can be seen from the above description, the parameter adjustment is performed based on the actual time consumed by the MAC scheduler to perform data processing in each TTI, and the time can most directly reflect the processing capability of the MAC layer, so that the adjustment is more accurate and reliable, and the terminal access as many as possible can be supported.

Further, the step S3 specifically includes:

when the operation state of the MAC scheduler is S0, determining whether t is greater than t0, if yes, performing step S31, otherwise, performing step S32;

s31, judging whether the number of data in the high-priority queue is larger than or equal to N, if so, increasing the number of data in the high-priority queue allowed to be processed by the MAC scheduler in each TTI, reducing the number of data in the low-priority queue allowed to be processed by the MAC scheduler in each TTI, and converting the operation state of the MAC scheduler into S1, otherwise, judging whether the number of data in the low-priority queue is larger than or equal to M, if so, reducing the number of data in the low-priority queue allowed to be processed by the MAC scheduler in each TTI, and converting the operation state of the MAC scheduler into S2;

s32, increasing the number of UE allowed to be processed by the MAC scheduler in each TTI;

when the operation state of the MAC scheduler is S1, determining whether t is greater than t0, if yes, performing step S33, otherwise, performing step S34;

s33, reducing the number of UE allowed to be processed by the MAC scheduler in each TTI, resetting the number of data of a high-priority queue and the number of data of a low-priority queue allowed to be processed by the MAC scheduler in each TTI as N and M, and converting the running state of the MAC scheduler into S0;

s34, reducing the number of data of a high-priority queue allowed to be processed by the MAC scheduler in each TTI, increasing the number of data of a low-priority queue allowed to be processed by the MAC scheduler in each TTI, and if the number of the data of the high-priority queue and the number of the data of the low-priority queue allowed to be processed by the MAC scheduler in each TTI are respectively restored to N and M, converting the running state of the MAC scheduler into S0;

when the operation state of the MAC scheduler is s1, if the data of the low-priority queue overflows, reducing the number of the UE which is allowed to be processed by the MAC scheduler in each TTI, resetting the number of the data of the high-priority queue which is allowed to be processed by the MAC scheduler in each TTI as N and the number of the data of the low-priority queue as M, and converting the operation state of the MAC scheduler into s 0;

when the operation state of the MAC scheduler is S2, determining whether t is greater than t0, if yes, performing step S35, otherwise, performing step S36;

s35, reducing the number of UE allowed to be processed by the MAC scheduler in each TTI, resetting the number of data of a high-priority queue and the number of data of a low-priority queue allowed to be processed by the MAC scheduler in each TTI as N and M, and converting the running state of the MAC scheduler into S0;

s36, increasing the number of data of the low-priority queue allowed to be processed by the MAC scheduler in each TTI, and if the number of the data of the low-priority queue allowed to be processed by the MAC scheduler in each TTI is M, converting the running state of the MAC scheduler into S0;

when the operation state of the MAC scheduler is s2, if the data of the low-priority queue overflows, the number of the UE which is allowed to be processed by the MAC scheduler in each TTI is reduced, the number of the data of the high-priority queue which is allowed to be processed by the MAC scheduler in each TTI is reset to be N, the number of the data of the low-priority queue is reset to be M, and the operation state of the MAC scheduler is converted into s 0.

It can be known from the above description that, when adjusting the data allowed to be processed by the MAC scheduler, the number of data in the high-low priority queue allowed to be processed by the MAC scheduler is preferentially adjusted, and then the number of UEs allowed to be processed is adjusted, which does not affect the overall stability of the system, and can maximize the performance capacity, thereby ensuring that the processing capability of the system is smoothly transited from busy time to idle time under the optimal condition, improving the robustness of the system, and by adjusting the number of UEs, avoiding the abnormality of the system processing when the number of data of the same priority level is large, and improving the flexibility of the system itself.

Referring to fig. 2, a terminal for scheduling reasonable MAC layer data includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the following steps:

Further, before step S1, the method further includes the steps of:

Further, the step S1 specifically includes:

when receiving a data, judging whether the data is retransmitted or newly transmitted, and storing the data into a corresponding high-priority queue or a corresponding low-priority queue according to a logic channel where the data is located.

Further, the step S2 specifically includes:

Further, the step S3 specifically includes:

Example one

s0, initializing the MAC scheduler, presetting N number of UE, N number of data of a high priority queue and M number of data of a low priority queue which are allowed to be processed by the MAC scheduler in each TTI, and setting the initial running state of the MAC scheduler to be S0;

the queues comprise a retransmission high-priority queue, a retransmission low-priority queue, a new transmission high-priority queue and a new transmission low-priority queue, and the priority sequence of the queues is as follows: retransmitting the high priority queue, retransmitting the low priority queue, newly transmitting the high priority queue and newly transmitting the low priority queue;

when receiving a data, judging whether the data is retransmitted or newly transmitted data, and storing the data into a corresponding high-priority queue or low-priority queue according to a logical channel where the data is located, specifically, when the RLC data is retransmitted, analyzing the logical channel where the data is located, and storing the logical channel into a corresponding high-priority queue or low-priority queue for retransmission; when newly transmitted data is received, firstly analyzing a logic channel where the data is located, and storing the logic channel into a corresponding newly transmitted high-priority queue or a corresponding newly transmitted low-priority queue;

the specific steps of storing the received data into the corresponding queue according to the logical channel where the received data is located are as follows: if the real-time requirement of the received data is high, such as video voice service data, the received data is stored in a high-priority queue, and if the real-time requirement of the received data is low, such as common data service data, the received data is stored in a low-priority queue;

ind, starting timing as the start of the current TTI of the MAC scheduler when the MAC scheduler receives an instruction from a PHY layer, finishing timing when the MAC scheduler finishes data processing, and taking the time t obtained by timing as the actual time t for the MAC scheduler to process data in each TTI;

the actual time t for the MAC scheduler to process the data in each TTI is related to the amount of the data to be processed currently, if the data to be processed currently by the MAC scheduler is less, the data to be processed by the MAC scheduler in one TTI is less, and the time t consumed by corresponding processing of the data is shorter;

s3, adjusting the number of UE, the number of data of a high priority queue and the number of data of a low priority queue which are allowed to be processed by the MAC scheduler in each TTI according to the actual time t, the maximum time t0 allowed to be operated by the MAC scheduler and the operation state of the MAC scheduler;

for each group of high-priority queues and low-priority queues, the number of data of the high-priority queues and the number of data of the low-priority queues allowed to be processed by the corresponding MAC scheduler in each TTI (transmission time interval), namely, for the retransmission high-priority queues and the retransmission low-priority queues, the number of data of the new transmission high-priority queues and the number of data of the new transmission low-priority queues allowed to be processed by the corresponding MAC scheduler in each TTI;

when data is received, relevant parameters of high-priority queues and low-priority queues of queues corresponding to the data are adjusted, namely the number of data of the high-priority queues and the number of data of the low-priority queues allowed to be processed by an MAC scheduler corresponding to the high-priority queues or the low-priority queues in each TTI, wherein the high-priority queues and the low-priority queues are stored with the data;

specifically, when the operation state of the MAC scheduler is S0, it is determined whether t is greater than t0, if yes, step S31 is executed, otherwise, step S32 is executed;

s32, increasing the number of UE allowed to be processed by the MAC scheduler in each TTI, wherein the number of UE allowed to be processed by the MAC scheduler in each TTI has a maximum value n_maxThe value is the maximum number of access UEs that the system can support;

when the operation state of the MAC scheduler is s1, if the data of the low priority queue overflows, reducing the number of UE which is allowed to be processed by the MAC scheduler in each TTI, resetting the number of data of the high priority queue which is allowed to be processed by the MAC scheduler in each TTI as N and the number of data of the low priority queue as M, and converting the operation state of the MAC scheduler into s0,

s36, increasing the number of data of low priority queues allowed to be processed by the MAC scheduler in each TTI, if the number of the data of the low priority queues allowed to be processed by the MAC scheduler in each TTI is M, converting the running state of the MAC scheduler into S0;

Example two

Referring to fig. 2, a terminal 1 for scheduling MAC layer data reasonably includes a memory 2, a processor 3, and a computer program stored in the memory 2 and executable on the processor 3, where the processor 3 implements the steps in the first embodiment when executing the computer program.

In summary, the method and terminal for scheduling MAC layer data reasonably provided by the present invention store the received data into different high and low priority queues according to the logical channel where the received data is located, and dynamically adjust the number of UEs allowed to process in each TTI, the number of data in the high priority queue, and the number of data in the low priority queue by comparing the actual time of processing data in each TTI by the MAC scheduler with the maximum time allowed to operate, and the operating state of the MAC scheduler, so as to grasp the load level of the system time, dynamically adjust the variable representing the processing capability of the system, and during dynamic adjustment, it can be determined which data need to be processed preferentially and which data can be processed with delay, thereby performing reasonable scheduling, maximizing the performance capacity of the system, and because the adjusted number of data in the high and low priority queues allowed to be processed in each TTI by the MAC scheduler, the current data is not actually processed in each time slot, so the adjustment does not affect the overall stability of the system, but the adjustment of the number of UEs allowed to be processed by the MAC scheduler in each TTI affects the ability of the MAC scheduler to schedule users in the current period of time (for example, the number of users is large or the traffic is heavy in this period of time), but can ensure the stability of the system, and ensure that the system processing ability is smoothly transited from busy time to idle time under the optimal condition, thereby ensuring the stability of the system on the one hand, and maximizing the performance of the system on the other hand, so that the system can process more users and larger traffic data amount.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims

1. A method for reasonably scheduling MAC layer data is characterized by comprising the following steps:

s1, storing the received data into a corresponding queue according to the logic channel where the received data is located, wherein the queue comprises a high priority queue and a low priority queue;

s3, according to the actual time t, the maximum time t0 allowed by the MAC scheduler to operate and the operation state of the MAC scheduler, adjusting the number of UE allowed to be processed by the MAC scheduler in each TTI, the data number of a high-priority queue and the data number of a low-priority queue;

wherein, before step S1, the method further comprises the steps of:

the step S3 specifically includes:

when the operation state of the MAC scheduler is s1, if the data of the low-priority queue overflows, reducing the number of UE (user equipment) which are allowed to be processed by the MAC scheduler in each TTI, resetting the number of data of the high-priority queue which is allowed to be processed by the MAC scheduler in each TTI to be N and the number of data of the low-priority queue to be M, and converting the operation state of the MAC scheduler into s 0;

when the operation state of the MAC scheduler is s2, if the data of the low-priority queue overflows, reducing the number of UE (user equipment) which are allowed to be processed by the MAC scheduler in each TTI, resetting the number of data of the high-priority queue which is allowed to be processed by the MAC scheduler in each TTI to be N and the number of data of the low-priority queue to be M, and converting the operation state of the MAC scheduler into s 0;

the storing the received data into the corresponding queue according to the logical channel where the received data is located includes:

if the real-time requirement of the received data is high, the received data is stored in a high-priority queue, and if the real-time requirement of the received data is low, the received data is stored in a low-priority queue.

2. The method for MAC layer data scheduling with reasonable scheduling according to claim 1, wherein the step S1 specifically includes:

3. The method for MAC layer data scheduling with reasonable scheduling according to claim 1, wherein the step S2 specifically includes:

4. A terminal for fair scheduling of MAC layer data comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of:

wherein, before step S1, the method further comprises the steps of:

the step S3 specifically includes:

the storing the received data into the corresponding queue according to the logic channel where the received data is located includes:

5. The terminal of claim 4, wherein the step S1 specifically includes:

6. The terminal of claim 4, wherein the step S2 specifically includes: