CN115098275A - Multithreading processing system and method for B5G base station broadband digital baseband signal - Google Patents

Abstract

The invention discloses a multithreading processing system and a multithreading processing method for broadband digital baseband signals of a B5G base station, which comprise a master control thread, a plurality of management threads, a management thread pool, a plurality of worker threads, a worker thread pool, a task queue between the management threads and the worker threads, and a cache pool; the system adopts a mode of a public task queue to improve the communication efficiency between the management thread and the working thread and reduce the time delay caused by internal communication: each management thread governs a task queue and continuously sends newly generated tasks into the queue; the working threads are arranged in a queue, the working threads at the head of the queue continuously poll the task queue to obtain the task with the highest priority, one thread exits the queue after obtaining the task, and the task enters the queue after being executed. The invention can efficiently process the broadband digital baseband signal, the signals between different time slots can not generate mutual interference, and the time delay of the system can be effectively reduced.

Description

Multithreading processing system and method for B5G base station broadband digital baseband signal

Technical Field

The invention belongs to the technical field of wireless communication, and relates to a multithreading processing system and a multithreading processing method for broadband digital baseband signals of a B5G (Beyond 5G) base station.

Background

In B5G mobile communication, a base station needs to support massive MIMO antennas and process wideband baseband signals, and also needs to achieve high throughput and low latency, which puts high demands on the baseband signal processing capability of the base station.

The processing of digital baseband signals is done with a general-purpose processor, which needs to be accelerated in a parallel manner. The parallel implementation mode mainly comprises SIMD instructions and multithreading, wherein the prior art schemes of multithreading are mainly divided into two types, one type is a pipeline parallel mode for parallel processing in time domain, and the other type is a task parallel mode for parallel division of each processing module. However, these two types of multithreading schemes still have disadvantages: the pipeline parallel mode can improve the throughput of the system, but cannot reduce the time delay of the system; signals between different time slots of the task parallel mode can generate mutual interference, and once the corresponding signal processing work cannot be completed in one time slot, time delay accumulation can be caused.

Therefore, it is necessary to design a multi-thread system, and design a matched thread pool and inter-thread communication scheme for it, so that it can have enough baseband signal processing capability to meet the requirement of B5G mobile communication.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a multithreading processing system and a multithreading processing method for broadband digital baseband signals of a B5G base station, which can support large-scale MIMO antennas, can efficiently process the broadband digital baseband signals, cannot generate mutual interference among signals in different time slots, and can effectively reduce the time delay of the system.

In order to solve the technical problems, the invention adopts the following technical scheme.

The invention discloses a multithreading processing system of B5G base station broadband digital baseband signals, which comprises a master control thread, a plurality of management threads, a management thread pool, a plurality of worker threads, a worker thread pool, a task queue between the management threads and the worker threads, and a cache pool, wherein the master control thread is used for controlling the number of the worker threads;

the system adopts a mode of a public task queue to improve the communication efficiency between the management thread and the working thread and reduce the time delay caused by internal communication: each management thread governs a task queue and continuously sends newly generated tasks into the queue; the working threads are arranged in a queue, the task queue is polled by the working thread at the head of the queue continuously to obtain the task with the highest priority, one thread exits the queue after obtaining the task, and enters the queue after executing the task;

the task queue is a first-in first-out queue, and the interior of a program of the task queue can be globally accessed;

the cache pool comprises two continuous cache regions which are respectively used for storing single-precision complex type intermediate results and byte type intermediate results; the data types are respectively byte type and single-precision floating-point complex number type.

Furthermore, the program of the master control thread is always in a circulating running state after being started; the system comprises a radio frequency interface which can exchange sampling signals with a radio frequency device, and a management thread pool object which can be used for calling a management thread.

Furthermore, each management thread of the plurality of management threads is bound with a global task queue; the method comprises the following steps: the high-level interface of the protocol stack can exchange binary data with the high level, the built-in function can divide the baseband signal processing module in parallel, and the cache management object can apply for and release the cache from the cache region.

Furthermore, the thread management pool comprises a pointer vector for storing the pointer of the thread management and a vector which is used for storing the state of the thread management and corresponds to the pointer vector one by one.

Furthermore, internal functions of the worker threads can complete tasks of any module in baseband signal processing; a task queue interface that can poll all management threads' task queues, a worker thread pool interface that can access thread pool status.

Furthermore, the worker thread pool comprises a queue for storing pointers of worker threads in an idle state and a vector for storing working states and task information of the worker threads in the worker thread pool.

The invention discloses a multithreading processing method of B5G base station broadband digital baseband signals, which adopts the multithreading processing system of the B5G base station broadband digital baseband signals, and comprises the following steps:

step 1, a master control thread starts to run, initialization work is executed, a management thread pool and a worker thread pool are established, a management thread is established through the management thread pool, and a worker thread is established through the worker thread pool; the newly-built management thread initializes the task queue and enters an idle state; the worker thread enters a running state once being created, wherein the worker thread at the head of the queue continuously polls the task queue for tasks;

step 2, the master control thread enters a main cycle, and the cycle is carried out by taking a time slot as a cycle until a termination instruction is received; in the main cycle, the master control thread firstly takes out an idle management thread from a management thread pool, then completes the synchronization of signal receiving and sending according to a timestamp variable, and then stores a signal obtained from a radio frequency interface into a corresponding cache region after the synchronization, and finally starts the management thread to complete the specific work, and the master control thread completes the current cycle;

step 3, binding a buffer area with proper size in the buffer pool according to the bandwidth of the signal to be processed and the like after the management thread is started; dividing the task modules into multiple tasks one by one in parallel according to the received signal characteristics, and distributing cache for each task; after the tasks are divided, the management thread pushes the tasks into a task queue, and the transmitted task messages comprise task types, task priorities and addresses input into a cache region; after the downlink signals are processed, the management thread calls a radio frequency interface to send out the signals; after the management thread processes a signal of a time slot, releasing the bound cache and returning the bound cache to the thread pool to enter an idle state;

step 4, the worker thread enters an operation state after being created, firstly, whether the thread is positioned at the head of a thread pool queue is judged, if the thread is positioned at the head of the thread pool queue, task queues of all management threads are polled, and tasks are obtained according to priorities and quit the queues; and after the current task is executed, re-entering the thread pool queue for queuing.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. according to the invention, by combining pipeline parallel with task parallel, the throughput of the system is improved, the time delay is reduced, and meanwhile, the conflict of signal processing among different time slots is avoided. And aiming at various threads, a corresponding thread pool is designed according to the characteristics and the working requirements of the threads, and the efficient management and scheduling of multiple threads can be realized.

2. The invention designs a set of efficient scheduling mechanism for calling the bottom layer working thread: each management thread governs a task queue and continuously sends newly generated tasks into the queue; the working threads are arranged in a queue, the working threads at the head of the queue continuously poll the task queue to obtain the task with the highest priority, one thread exits the queue after obtaining the task, and the task enters the queue after being executed. The mode of adopting the public task queue can effectively improve the communication efficiency between the management thread and the working thread and reduce the time delay caused by internal communication.

3. The invention divides the signal processing in one time slot into a plurality of tasks, thereby designing a buffer area to exchange data among different working threads. The invention combines the characteristics of baseband signals and divides the cache area into two parts, namely a byte type cache area and a floating point complex type cache area. The design can avoid repeated application for releasing the cache, and is more convenient for managing the thread management cache region and informing the cache position of the working thread.

Drawings

FIG. 1 is a system framework diagram of an embodiment of the present invention.

FIG. 2 is a flow chart of a method according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a cache pool according to an embodiment of the present invention.

Detailed Description

The invention provides a multithreading processing system and a multithreading processing method for broadband digital baseband signals of a B5G base station, wherein the system comprises a physical layer receiving and transmitting master control thread, a plurality of management threads for parallel task division of a baseband signal processing module, a plurality of worker threads for processing baseband tasks, a management thread pool, a worker thread pool, a task queue between the management threads and the worker threads and a cache pool for storing intermediate results. According to the invention, by combining pipeline parallel with task parallel, the throughput of the system is improved, the time delay is reduced, and meanwhile, the conflict of signal processing among different time slots is avoided. And aiming at various threads, a corresponding thread pool is designed according to the characteristics and the working requirements of the threads, and the efficient management and scheduling of multiple threads can be realized. The invention can be applied to a large-scale MIMO-OFDM system base station with B5G standard, is used for processing broadband digital baseband signals, and can improve the system efficiency, the throughput and the time delay.

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in FIG. 1, the multi-thread processing system of the B5G base station broadband digital baseband signal comprises an overall control thread, a plurality of management threads, a management thread pool, a plurality of worker threads, a worker thread pool, a task queue between the management threads and the worker threads, and a buffer pool.

The program of the master control thread is always in a circulating running state after being started, the master control thread comprises a radio frequency interface which can exchange sampling signals with radio frequency equipment, and a management thread pool object is arranged in the master control thread and can be used for calling a management thread.

Each management thread is bound with a global task queue, comprises a radio frequency interface which can exchange sampling signals with radio frequency equipment, comprises a protocol stack high-level interface which can exchange binary data with a high level, and comprises a cache management object which can apply for and release cache from a cache region, wherein the baseband signal processing module can be divided in parallel by a built-in function.

The management thread pool internally comprises a pointer vector for storing the pointer of the management thread and a vector which is in one-to-one correspondence with the pointer vector and is used for storing the state of the management thread.

The internal function of the worker thread can complete the task of any module in the baseband signal processing, the task queue interface can poll the task queues of all management threads, and the worker thread pool interface can access the thread pool state.

The worker thread pool comprises a queue for storing pointers of worker threads in an idle state, and a vector for storing the working state and task information of the worker threads in the worker thread pool.

The task queue is a first-in first-out queue, and the inside of the program can be globally accessed.

The cache pool comprises two continuous cache regions which are respectively used for storing single-precision complex type intermediate results and byte type intermediate results. The data types are respectively byte type and single-precision floating-point complex number type.

As shown in fig. 2, the multithread processing method for B5G base station wideband digital baseband signal of the present invention includes the following steps:

step 1: and the master control thread starts to run, performs initialization work, completes the creation of a management thread pool and a worker thread pool, creates a management thread through the management thread pool, and creates a worker thread through the worker thread pool. The newly-built management thread initializes the task queue and enters an idle state; once created, the worker thread enters a run state in which the worker thread at the head of the queue continually polls the task queue for tasks.

And 2, step: and the master control thread enters a main cycle and circulates by taking a time slot as a cycle until a termination instruction is received. In the main cycle, the master control thread takes out an idle management thread from the management thread pool, then completes the synchronization of signal receiving and sending according to the timestamp variable, and then stores the signal obtained from the radio frequency interface into a corresponding buffer area after the synchronization, and finally starts the management thread to complete the specific work, and the master control thread completes the current cycle.

And step 3: after the management thread is started, a buffer area with a proper size in the buffer pool can be bound according to the bandwidth of a signal to be processed and the like; next, according to the received signal characteristics, dividing the task modules into multiple tasks one by one in parallel, and distributing cache for each task; after the tasks are divided, the management thread pushes the tasks into a task queue, and transmitted task messages comprise task types, task priorities and addresses input into a cache region; after the downlink signals are processed, the management thread calls a radio frequency interface to send out the signals; and after the management thread finishes processing the signal of one time slot, releasing the bound cache and returning to the thread pool to enter an idle state.

And 4, step 4: the worker thread enters an operating state after being created, whether the thread is at the head of a thread pool queue is judged, if the thread is at the head of the thread pool queue, task queues of all management threads are polled, and tasks are obtained according to priorities and exit the queues; and after the current task is executed, re-entering the thread pool queue for queuing.

As shown in fig. 3, the cache pool according to the present invention includes two continuous caches, which are respectively used for storing single-precision complex type intermediate results and byte type intermediate results.

Claims (7)

1. A multithreading processing system of B5G base station broadband digital baseband signals is characterized by comprising a master control thread, a plurality of management threads, a management thread pool, a plurality of worker threads, a worker thread pool, a task queue between the management threads and the worker threads, and a cache pool;

the system adopts a mode of a public task queue to improve the communication efficiency between the management thread and the working thread and reduce the time delay caused by internal communication: each management thread governs a task queue and continuously sends newly generated tasks into the queue; the working threads are arranged in a queue, the task queue is polled by the working thread at the head of the queue continuously to obtain the task with the highest priority, one thread exits the queue after obtaining the task, and enters the queue after executing the task;

the task queue is a first-in first-out queue, and the interior of a program of the task queue can be globally accessed;

the cache pool comprises two continuous cache regions which are respectively used for storing single-precision complex type intermediate results and byte type intermediate results; the data types are respectively byte type and single-precision floating-point complex number type.

2. The multithreading system of B5G base station broadband digital baseband signals according to claim 1, wherein the program of the master control thread is always in a loop running state after being started; the system comprises a radio frequency interface which can exchange sampling signals with a radio frequency device, and a management thread pool object which can be used for calling a management thread.

3. The system according to claim 1, wherein said plurality of management threads, each management thread bound to a global task queue; the method comprises the following steps: the high-level interface of the protocol stack can exchange binary data with the high level, the built-in function can divide the baseband signal processing module in parallel, and the cache management object can apply for and release the cache from the cache region.

4. The system of claim 1, wherein the management thread pool comprises a pointer vector for storing the management thread's pointer, a vector for storing the management thread's status and corresponding to the pointer vector.

5. The system of claim 1, wherein said worker threads have internal functions to perform tasks of any module in baseband signal processing; a task queue interface that can poll all management threads' task queues, a worker thread pool interface that can access thread pool status.

6. A system for multithreaded processing of B5G base station wideband digital baseband signals, according to claim 1, wherein said worker thread pool comprises a queue for holding pointers of worker threads in idle state, and a vector for holding worker thread work state and task information therein.

7. A multithreading processing method of B5G base station broadband digital baseband signals is characterized in that a multithreading processing system of B5G base station broadband digital baseband signals is adopted, and the multithreading processing system comprises a master control thread, a plurality of management threads, a management thread pool, a plurality of worker threads, a worker thread pool, a task queue between the management threads and the worker threads and a cache pool; the system adopts a mode of a public task queue to improve the communication efficiency between the management thread and the working thread and reduce the time delay caused by internal communication: each management thread governs a task queue and continuously sends newly generated tasks into the queue; the working threads are arranged in a queue, the task queue is polled by the working thread at the head of the queue continuously to obtain the task with the highest priority, one thread exits the queue after obtaining the task, and enters the queue after executing the task;

the task queue is a first-in first-out queue, and the interior of a program of the task queue can be globally accessed;

the cache pool comprises two continuous cache regions which are respectively used for storing single-precision complex type intermediate results and byte type intermediate results; the data types are respectively byte type and single-precision floating-point complex type;

the method comprises the following steps:

step 1, a master control thread starts to run, initialization work is executed, a management thread pool and a worker thread pool are established, a management thread is established through the management thread pool, and a worker thread is established through the worker thread pool; the newly-built management thread initializes the task queue and enters an idle state; the worker thread enters a running state once being created, wherein the worker thread at the head of the queue continuously polls the task queue for tasks;

step 2, the master control thread enters a main cycle, and the cycle is carried out by taking a time slot as a cycle until a termination instruction is received; in the main cycle, the master control thread firstly takes out an idle management thread from a management thread pool, then completes the synchronization of signal receiving and sending according to a timestamp variable, and then stores a signal obtained from a radio frequency interface into a corresponding cache region after the synchronization, and finally starts the management thread to complete the specific work, and the master control thread completes the current cycle;

step 3, binding a buffer area with proper size in the buffer pool according to the bandwidth of the signal to be processed and the like after the management thread is started; dividing the task modules into multiple tasks one by one in parallel according to the received signal characteristics, and distributing cache for each task; after the tasks are divided, the management thread pushes the tasks into a task queue, and transmitted task messages comprise task types, task priorities and addresses input into a cache region; after the downlink signals are processed, the management thread calls a radio frequency interface to send out the signals; after the management thread processes a signal of a time slot, releasing the bound cache and returning the bound cache to the thread pool to enter an idle state;

step 4, the worker thread enters an operation state after being created, firstly, whether the thread is positioned at the head of a thread pool queue is judged, if the thread is positioned at the head of the thread pool queue, task queues of all management threads are polled, and tasks are obtained according to priorities and quit the queues; and after the current task is executed, re-entering the thread pool queue for queuing.

Images